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fuchsia / third_party / capstone / refs/heads/upstream/next / . / arch / ARM / ARMDisassembler.c
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/* Capstone Disassembly Engine, http://www.capstone-engine.org */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2022, */
/* Rot127 <unisono@quyllur.org> 2022-2023 */
/* Automatically translated source file from LLVM. */
/* LLVM-commit: 464bda7750a3ba9e23823fc707d7e7b6fc38438d */
/* LLVM-tag: llvmorg-16.0.2-5-g464bda7750a3 */
/* Only small edits allowed. */
/* For multiple similar edits, please create a Patch for the translator. */
/* Capstone's C++ file translator: */
/* https://github.com/capstone-engine/capstone/tree/next/suite/auto-sync */
//===- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA ---------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <capstone/platform.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../../LEB128.h"
#include "../../MCDisassembler.h"
#include "../../MCFixedLenDisassembler.h"
#include "../../MCInst.h"
#include "../../MCInstrDesc.h"
#include "../../MCRegisterInfo.h"
#include "../../MathExtras.h"
#include "../../cs_priv.h"
#include "../../utils.h"
#include "ARMLinkage.h"
#include "ARMAddressingModes.h"
#include "ARMBaseInfo.h"
#include "ARMDisassemblerExtension.h"
#include "ARMMapping.h"
#define GET_INSTRINFO_MC_DESC
#include "ARMGenInstrInfo.inc"
#define CONCAT(a, b) CONCAT_(a, b)
#define CONCAT_(a, b) a##_##b
#define DEBUG_TYPE "arm-disassembler"
// Handles the condition code status of instructions in IT blocks
;
;
/// ARM disassembler for all ARM platforms.;
static DecodeStatus getInstruction(csh ud, const uint8_t *Bytes, size_t ByteLen,
MCInst *MI, uint16_t *Size, uint64_t Address,
void *Info);
DecodeStatus getARMInstruction(csh ud, const uint8_t *Bytes, size_t ByteLen,
MCInst *MI, uint16_t *Size, uint64_t Address,
void *Info);
DecodeStatus getThumbInstruction(csh ud, const uint8_t *Bytes, size_t ByteLen,
MCInst *MI, uint16_t *Size, uint64_t Address,
void *Info);
DecodeStatus AddThumbPredicate(MCInst *);
void UpdateThumbVFPPredicate(DecodeStatus, MCInst *);
;
// end anonymous namespace
// Forward declare these because the autogenerated code will reference them.
// Definitions are further down.
static DecodeStatus DecodeGPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeCLRMGPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodetGPROddRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodetGPREvenRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus
DecodeGPRwithAPSR_NZCVnospRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeGPRnopcRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeGPRnospRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeGPRwithAPSRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeGPRwithZRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeGPRwithZRnospRegisterClass(MCInst *Inst,
unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodetGPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodetcGPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecoderGPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeGPRPairRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeGPRPairnospRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeGPRspRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeHPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeSPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeDPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeDPR_8RegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeSPR_8RegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeQPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMQPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMQQPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMQQQQPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeDPairRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodePredicateOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeCCOutOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeRegListOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeSPRRegListOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeDPRRegListOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeBitfieldMaskOperand(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeCopMemInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeSORegMemOperand(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeAddrMode3Instruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeTSBInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeSORegImmOperand(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeSORegRegOperand(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst *Inst,
unsigned Insn,
uint64_t Adddress,
const void *Decoder);
static DecodeStatus DecodeT2MOVTWInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeArmMOVTWInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeSMLAInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeHINTInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeCPSInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeTSTInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeSETPANInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2CPSInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2HintSpaceInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeAddrModeImm12Operand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeAddrMode5Operand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeAddrMode5FP16Operand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeAddrMode7Operand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2BInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeBranchImmInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeAddrMode6Operand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLDST1Instruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLDST2Instruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLDST3Instruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLDST4Instruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLDInstruction(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeVSTInstruction(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeVLD1DupInstruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLD2DupInstruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLD3DupInstruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLD4DupInstruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVMOVModImmInstruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMVEModImmInstruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMVEVADCInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVSHLMaxInstruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeShiftRight8Imm(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeShiftRight16Imm(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeShiftRight32Imm(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeShiftRight64Imm(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeTBLInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodePostIdxReg(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeMveAddrModeRQ(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
#define DECLARE_DecodeMveAddrModeQ(shift) \
static DecodeStatus CONCAT(DecodeMveAddrModeQ, shift)( \
MCInst * Inst, unsigned Insn, uint64_t Address, \
const void *Decoder);
DECLARE_DecodeMveAddrModeQ(2) DECLARE_DecodeMveAddrModeQ(3)
static DecodeStatus
DecodeCoprocessor(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMemBarrierOption(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeInstSyncBarrierOption(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMSRMask(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeBankedReg(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeDoubleRegLoad(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeDoubleRegStore(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeLDRPreImm(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeLDRPreReg(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeSTRPreImm(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeSTRPreReg(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeVLD1LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLD2LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLD3LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVLD4LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVST1LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVST2LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVST3LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVST4LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVMOVSRR(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVMOVRRS(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeSwap(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVCVTD(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVCVTQ(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVCVTImmOperand(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeNEONComplexLane64Instruction(MCInst *Inst,
unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbAddSpecialReg(MCInst *Inst, uint16_t Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbBROperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2BROperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeThumbCmpBROperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbAddrModeRR(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbAddrModeIS(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbAddrModePC(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbAddrModeSP(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2AddrModeSOReg(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2LoadShift(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2LoadImm8(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2LoadImm12(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2LoadT(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2LoadLabel(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2Imm8S4(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2Imm7S4(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2AddrModeImm8s4(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2AddrModeImm7s4(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2Imm8(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder);
#define DECLARE_DecodeT2Imm7(shift) \
static DecodeStatus CONCAT(DecodeT2Imm7, shift)(MCInst * Inst, \
unsigned Val, \
uint64_t Address, \
const void *Decoder);
DECLARE_DecodeT2Imm7(0) DECLARE_DecodeT2Imm7(1) DECLARE_DecodeT2Imm7(2)
static DecodeStatus
DecodeT2AddrModeImm8(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder);
#define DECLARE_DecodeTAddrModeImm7(shift) \
static DecodeStatus CONCAT(DecodeTAddrModeImm7, shift)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder);
DECLARE_DecodeTAddrModeImm7(0) DECLARE_DecodeTAddrModeImm7(1)
#define DECLARE_DecodeT2AddrModeImm7(shift, WriteBack) \
static DecodeStatus CONCAT(DecodeT2AddrModeImm7, \
CONCAT(shift, WriteBack))( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder);
DECLARE_DecodeT2AddrModeImm7(0, 0) DECLARE_DecodeT2AddrModeImm7(1, 0)
DECLARE_DecodeT2AddrModeImm7(2, 0)
DECLARE_DecodeT2AddrModeImm7(0, 1)
DECLARE_DecodeT2AddrModeImm7(1, 1)
DECLARE_DecodeT2AddrModeImm7(2, 1)
static DecodeStatus
DecodeThumbAddSPImm(MCInst *Inst, uint16_t Val, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbAddSPReg(MCInst *Inst, uint16_t Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeThumbCPS(MCInst *Inst, uint16_t Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeQADDInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbBLXOffset(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2AddrModeImm12(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbTableBranch(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumb2BCCInstruction(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2SOImm(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbBCCTargetOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeThumbBLTargetOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeIT(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2LDRDPreInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2STRDPreInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2Adr(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2LdStPre(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2ShifterImmOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeLDR(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder);
static DecodeStatus DecoderForMRRC2AndMCRR2(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeForVMRSandVMSR(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
#define DECLARE_DecodeBFLabelOperand(isSigned, isNeg, zeroPermitted, size) \
static DecodeStatus CONCAT( \
DecodeBFLabelOperand, \
CONCAT(isSigned, CONCAT(isNeg, CONCAT(zeroPermitted, size))))( \
MCInst * Inst, unsigned val, uint64_t Address, \
const void *Decoder);
DECLARE_DecodeBFLabelOperand(false, false, false,
4) DECLARE_DecodeBFLabelOperand(true, false, true,
18)
DECLARE_DecodeBFLabelOperand(true, false, true, 12)
DECLARE_DecodeBFLabelOperand(true, false, true, 16)
DECLARE_DecodeBFLabelOperand(false, true, true, 11)
DECLARE_DecodeBFLabelOperand(false, false, true,
11)
static DecodeStatus
DecodeBFAfterTargetOperand(MCInst *Inst, unsigned val, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodePredNoALOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeLOLoop(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeLongShiftOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVSCCLRM(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVPTMaskOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeVpredROperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeRestrictedIPredicateOperand(MCInst *Inst,
unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeRestrictedSPredicateOperand(MCInst *Inst,
unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeRestrictedUPredicateOperand(MCInst *Inst,
unsigned Val,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeRestrictedFPPredicateOperand(MCInst *Inst,
unsigned Val,
uint64_t Address,
const void *Decoder);
#define DECLARE_DecodeVSTRVLDR_SYSREG(Writeback) \
static DecodeStatus CONCAT(DecodeVSTRVLDR_SYSREG, Writeback)( \
MCInst * Inst, unsigned Insn, uint64_t Address, \
const void *Decoder);
DECLARE_DecodeVSTRVLDR_SYSREG(false) DECLARE_DecodeVSTRVLDR_SYSREG(true)
#define DECLARE_DecodeMVE_MEM_1_pre(shift) \
static DecodeStatus CONCAT(DecodeMVE_MEM_1_pre, shift)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder);
DECLARE_DecodeMVE_MEM_1_pre(0) DECLARE_DecodeMVE_MEM_1_pre(1)
#define DECLARE_DecodeMVE_MEM_2_pre(shift) \
static DecodeStatus CONCAT(DecodeMVE_MEM_2_pre, shift)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder);
DECLARE_DecodeMVE_MEM_2_pre(0) DECLARE_DecodeMVE_MEM_2_pre(
1) DECLARE_DecodeMVE_MEM_2_pre(2)
#define DECLARE_DecodeMVE_MEM_3_pre(shift) \
static DecodeStatus CONCAT(DecodeMVE_MEM_3_pre, shift)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder);
DECLARE_DecodeMVE_MEM_3_pre(
2) DECLARE_DecodeMVE_MEM_3_pre(3)
#define DECLARE_DecodePowerTwoOperand(MinLog, MaxLog) \
static DecodeStatus CONCAT(DecodePowerTwoOperand, \
CONCAT(MinLog, MaxLog))( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder);
DECLARE_DecodePowerTwoOperand(0, 3)
#define DECLARE_DecodeMVEPairVectorIndexOperand(start) \
static DecodeStatus CONCAT(DecodeMVEPairVectorIndexOperand, start)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder);
DECLARE_DecodeMVEPairVectorIndexOperand(
2)
DECLARE_DecodeMVEPairVectorIndexOperand(
0)
static DecodeStatus
DecodeMVEVMOVQtoDReg(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMVEVMOVDRegtoQ(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeMVEVCVTt1fp(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
typedef DecodeStatus OperandDecoder(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder);
#define DECLARE_DecodeMVEVCMP(scalar, predicate_decoder) \
static DecodeStatus CONCAT(DecodeMVEVCMP, \
CONCAT(scalar, predicate_decoder))( \
MCInst * Inst, unsigned Insn, uint64_t Address, \
const void *Decoder);
DECLARE_DecodeMVEVCMP(false, DecodeRestrictedIPredicateOperand) DECLARE_DecodeMVEVCMP(
false, DecodeRestrictedUPredicateOperand)
DECLARE_DecodeMVEVCMP(false, DecodeRestrictedSPredicateOperand)
DECLARE_DecodeMVEVCMP(true, DecodeRestrictedIPredicateOperand)
DECLARE_DecodeMVEVCMP(true,
DecodeRestrictedUPredicateOperand)
DECLARE_DecodeMVEVCMP(
true, DecodeRestrictedSPredicateOperand)
DECLARE_DecodeMVEVCMP(
false,
DecodeRestrictedFPPredicateOperand)
DECLARE_DecodeMVEVCMP(
true,
DecodeRestrictedFPPredicateOperand)
static DecodeStatus
DecodeMveVCTP(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeMVEVPNOT(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeMVEOverlappingLongShift(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeT2AddSubSPImm(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
#include "ARMGenDisassemblerTables.inc"
// Post-decoding checks
static DecodeStatus checkDecodedInstruction(MCInst *MI, uint32_t Insn,
DecodeStatus Result)
{
switch (MCInst_getOpcode(MI)) {
case ARM_HVC: {
// HVC is undefined if condition = 0xf otherwise upredictable
// if condition != 0xe
uint32_t Cond = (Insn >> 28) & 0xF;
if (Cond == 0xF)
return MCDisassembler_Fail;
if (Cond != 0xE)
return MCDisassembler_SoftFail;
return Result;
}
case ARM_t2ADDri:
case ARM_t2ADDri12:
case ARM_t2ADDrr:
case ARM_t2ADDrs:
case ARM_t2SUBri:
case ARM_t2SUBri12:
case ARM_t2SUBrr:
case ARM_t2SUBrs:
if (MCOperand_getReg(MCInst_getOperand(MI, (0))) == ARM_SP &&
MCOperand_getReg(MCInst_getOperand(MI, (1))) != ARM_SP)
return MCDisassembler_SoftFail;
return Result;
default:
return Result;
}
}
static DecodeStatus getInstruction(csh ud, const uint8_t *Bytes,
size_t BytesLen, MCInst *MI, uint16_t *Size,
uint64_t Address, void *Info)
{
DecodeStatus Result = MCDisassembler_Fail;
if (MI->csh->mode & CS_MODE_THUMB)
Result = getThumbInstruction(ud, Bytes, BytesLen, MI, Size,
Address, Info);
else
Result = getARMInstruction(ud, Bytes, BytesLen, MI, Size,
Address, Info);
MCInst_handleWriteback(MI, ARMInsts);
return Result;
}
static inline uint32_t endianSensitiveOpcode32(MCInst *MI, const uint8_t *Bytes)
{
uint32_t Insn;
if (MODE_IS_BIG_ENDIAN(MI->csh->mode))
Insn = (Bytes[3] << 0) | (Bytes[2] << 8) | (Bytes[1] << 16) |
((uint32_t)Bytes[0] << 24);
else
Insn = ((uint32_t)Bytes[3] << 24) | (Bytes[2] << 16) |
(Bytes[1] << 8) | (Bytes[0] << 0);
return Insn;
}
static inline uint16_t endianSensitiveOpcode16(MCInst *MI, const uint8_t *Bytes)
{
uint16_t Insn;
if (MODE_IS_BIG_ENDIAN(MI->csh->mode))
Insn = (Bytes[0] << 8) | Bytes[1];
else
Insn = (Bytes[1] << 8) | Bytes[0];
return Insn;
}
DecodeStatus getARMInstruction(csh ud, const uint8_t *Bytes, size_t BytesLen,
MCInst *MI, uint16_t *Size, uint64_t Address,
void *Info)
{
// We want to read exactly 4 bytes of data.
if (BytesLen < 4) {
*Size = 0;
return MCDisassembler_Fail;
}
// Encoded as a 32-bit word in the stream.
uint32_t Insn = endianSensitiveOpcode32(MI, Bytes);
// Calling the auto-generated decoder function.
DecodeStatus Result =
decodeInstruction_4(DecoderTableARM32, MI, Insn, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
return checkDecodedInstruction(MI, Insn, Result);
}
typedef struct DecodeTable {
const uint8_t *P;
bool DecodePred;
} DecodeTable;
const DecodeTable Tables[] = {
{ DecoderTableVFP32, false },
{ DecoderTableVFPV832, false },
{ DecoderTableNEONData32, true },
{ DecoderTableNEONLoadStore32, true },
{ DecoderTableNEONDup32, true },
{ DecoderTablev8NEON32, false },
{ DecoderTablev8Crypto32, false },
};
for (int i = 0; i < (sizeof(Tables) / sizeof(Tables[0])); ++i) {
MCInst_clear(MI);
DecodeTable Table = Tables[i];
Result = decodeInstruction_4(Table.P, MI, Insn, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
// Add a fake predicate operand, because we share these instruction
// definitions with Thumb2 where these instructions are predicable.
if (Table.DecodePred &&
!DecodePredicateOperand(MI, 0xE, Address, Table.P))
return MCDisassembler_Fail;
return Result;
}
}
Result = decodeInstruction_4(DecoderTableCoProc32, MI, Insn, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
return checkDecodedInstruction(MI, Insn, Result);
}
*Size = 4;
return MCDisassembler_Fail;
}
extern const MCInstrDesc ARMInsts[];
/// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
/// immediate Value in the MCInst. The immediate Value has had any PC
/// adjustment made by the caller. If the instruction is a branch instruction
/// then isBranch is true, else false. If the getOpInfo() function was set as
/// part of the setupForSymbolicDisassembly() call then that function is called
/// to get any symbolic information at the Address for this instruction. If
/// that returns non-zero then the symbolic information it returns is used to
/// create an MCExpr and that is added as an operand to the MCInst. If
/// getOpInfo() returns zero and isBranch is true then a symbol look up for
/// Value is done and if a symbol is found an MCExpr is created with that, else
/// an MCExpr with Value is created. This function returns true if it adds an
/// operand to the MCInst and false otherwise.
static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
bool isBranch, uint64_t InstSize,
MCInst *MI, const void *Decoder)
{
// FIXME: Does it make sense for value to be negative?
// return Decoder->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address,
// isBranch, /*Offset=*/0, /*OpSize=*/0,
// InstSize);
return false;
}
/// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
/// referenced by a load instruction with the base register that is the Pc.
/// These can often be values in a literal pool near the Address of the
/// instruction. The Address of the instruction and its immediate Value are
/// used as a possible literal pool entry. The SymbolLookUp call back will
/// return the name of a symbol referenced by the literal pool's entry if
/// the referenced address is that of a symbol. Or it will return a pointer to
/// a literal 'C' string if the referenced address of the literal pool's entry
/// is an address into a section with 'C' string literals.
static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
const void *Decoder)
{
// Decoder->tryAddingPcLoadReferenceComment(Value, Address);
}
// Thumb1 instructions don't have explicit S bits. Rather, they
// implicitly set CPSR. Since it's not represented in the encoding, the
// auto-generated decoder won't inject the CPSR operand. We need to fix
// that as a post-pass.
static void AddThumb1SBit(MCInst *MI, bool InITBlock)
{
const MCOperandInfo *OpInfo = ARMInsts[MCInst_getOpcode(MI)].OpInfo;
unsigned short NumOps = ARMInsts[MCInst_getOpcode(MI)].NumOperands;
unsigned i;
for (i = 0; i < NumOps; ++i) {
if (i == MCInst_getNumOperands(MI))
break;
if (MCOperandInfo_isOptionalDef(&OpInfo[i]) &&
OpInfo[i].RegClass == ARM_CCRRegClassID) {
if (i > 0 && MCOperandInfo_isPredicate(&OpInfo[i - 1]))
continue;
MCInst_insert0(MI, i,
MCOperand_CreateReg1(
MI, (InITBlock ? 0 : ARM_CPSR)));
return;
}
}
MCInst_insert0(MI, i,
MCOperand_CreateReg1(MI, (InITBlock ? 0 : ARM_CPSR)));
}
static bool isVectorPredicable(unsigned Opcode)
{
const MCOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo;
unsigned short NumOps = ARMInsts[Opcode].NumOperands;
for (unsigned i = 0; i < NumOps; ++i) {
if (ARM_isVpred(OpInfo[i].OperandType))
return true;
}
return false;
}
// Most Thumb instructions don't have explicit predicates in the
// encoding, but rather get their predicates from IT context. We need
// to fix up the predicate operands using this context information as a
// post-pass.
DecodeStatus AddThumbPredicate(MCInst *MI)
{
DecodeStatus S = MCDisassembler_Success;
// A few instructions actually have predicates encoded in them. Don't
// try to overwrite it if we're seeing one of those.
switch (MCInst_getOpcode(MI)) {
case ARM_tBcc:
case ARM_t2Bcc:
case ARM_tCBZ:
case ARM_tCBNZ:
case ARM_tCPS:
case ARM_t2CPS3p:
case ARM_t2CPS2p:
case ARM_t2CPS1p:
case ARM_t2CSEL:
case ARM_t2CSINC:
case ARM_t2CSINV:
case ARM_t2CSNEG:
case ARM_tMOVSr:
case ARM_tSETEND:
// Some instructions (mostly conditional branches) are not
// allowed in IT blocks.
if (ITBlock_instrInITBlock(&(MI->csh->ITBlock)))
S = MCDisassembler_SoftFail;
else
return MCDisassembler_Success;
break;
case ARM_t2HINT:
if (MCOperand_getImm(MCInst_getOperand(MI, (0))) == 0x10 &&
(ARM_getFeatureBits(MI->csh->mode, ARM_FeatureRAS)) != 0)
S = MCDisassembler_SoftFail;
break;
case ARM_tB:
case ARM_t2B:
case ARM_t2TBB:
case ARM_t2TBH:
// Some instructions (mostly unconditional branches) can
// only appears at the end of, or outside of, an IT.
if (ITBlock_instrInITBlock(&(MI->csh->ITBlock)) &&
!ITBlock_instrLastInITBlock(&(MI->csh->ITBlock)))
S = MCDisassembler_SoftFail;
break;
default:
break;
}
// Warn on non-VPT predicable instruction in a VPT block and a VPT
// predicable instruction in an IT block
if ((!isVectorPredicable(MCInst_getOpcode(MI)) &&
VPTBlock_instrInVPTBlock(&(MI->csh->VPTBlock))) ||
(isVectorPredicable(MCInst_getOpcode(MI)) &&
ITBlock_instrInITBlock(&(MI->csh->ITBlock))))
S = MCDisassembler_SoftFail;
// If we're in an IT/VPT block, base the predicate on that. Otherwise,
// assume a predicate of AL.
unsigned CC = ARMCC_AL;
unsigned VCC = ARMVCC_None;
if (ITBlock_instrInITBlock(&(MI->csh->ITBlock))) {
CC = ITBlock_getITCC(&(MI->csh->ITBlock));
ITBlock_advanceITState(&(MI->csh->ITBlock));
} else if (VPTBlock_instrInVPTBlock(&(MI->csh->VPTBlock))) {
VCC = VPTBlock_getVPTPred(&(MI->csh->VPTBlock));
VPTBlock_advanceVPTState(&(MI->csh->VPTBlock));
}
const MCOperandInfo *OpInfo = ARMInsts[MCInst_getOpcode(MI)].OpInfo;
unsigned short NumOps = ARMInsts[MCInst_getOpcode(MI)].NumOperands;
unsigned i;
for (i = 0; i < NumOps; ++i) {
if (MCOperandInfo_isPredicate(&OpInfo[i]) ||
i == MCInst_getNumOperands(MI))
break;
}
if (MCInst_isPredicable(&ARMInsts[MCInst_getOpcode(MI)])) {
MCInst_insert0(MI, i, MCOperand_CreateImm1(MI, (CC)));
if (CC == ARMCC_AL)
MCInst_insert0(MI, i + 1,
MCOperand_CreateReg1(MI, (0)));
else
MCInst_insert0(MI, i + 1,
MCOperand_CreateReg1(MI, (ARM_CPSR)));
} else if (CC != ARMCC_AL) {
Check(&S, MCDisassembler_SoftFail);
}
unsigned VCCPos;
for (VCCPos = 0; VCCPos < NumOps; ++VCCPos) {
if (ARM_isVpred(OpInfo[VCCPos].OperandType) ||
VCCPos == MCInst_getNumOperands(MI))
break;
}
if (isVectorPredicable(MCInst_getOpcode(MI))) {
MCInst_insert0(MI, VCCPos, MCOperand_CreateImm1(MI, (VCC)));
if (VCC == ARMVCC_None)
MCInst_insert0(MI, VCCPos + 1,
MCOperand_CreateReg1(MI, (0)));
else
MCInst_insert0(MI, VCCPos + 1,
MCOperand_CreateReg1(MI, (ARM_P0)));
MCInst_insert0(MI, VCCPos + 2, MCOperand_CreateReg1(MI, (0)));
if (OpInfo[VCCPos].OperandType == ARM_OP_VPRED_R) {
int TiedOp = MCOperandInfo_getOperandConstraint(
&ARMInsts[MCInst_getOpcode(MI)], VCCPos + 3,
MCOI_TIED_TO);
assert(TiedOp >= 0 &&
"Inactive register in vpred_r is not tied to an output!");
// Copy the operand to ensure it's not invalidated when MI grows.
MCOperand Op = *MCInst_getOperand(MI, TiedOp);
MCInst_insert0(MI, VCCPos + 3, &Op);
}
} else if (VCC != ARMVCC_None) {
Check(&S, MCDisassembler_SoftFail);
}
return S;
}
// Thumb VFP instructions are a special case. Because we share their
// encodings between ARM and Thumb modes, and they are predicable in ARM
// mode, the auto-generated decoder will give them an (incorrect)
// predicate operand. We need to rewrite these operands based on the IT
// context as a post-pass.
void UpdateThumbVFPPredicate(DecodeStatus S, MCInst *MI)
{
unsigned CC;
CC = ITBlock_getITCC(&(MI->csh->ITBlock));
if (CC == 0xF)
CC = ARMCC_AL;
if (ITBlock_instrInITBlock(&(MI->csh->ITBlock)))
ITBlock_advanceITState(&(MI->csh->ITBlock));
else if (VPTBlock_instrInVPTBlock(&(MI->csh->VPTBlock))) {
CC = VPTBlock_getVPTPred(&(MI->csh->VPTBlock));
VPTBlock_advanceVPTState(&(MI->csh->VPTBlock));
}
const MCOperandInfo *OpInfo = ARMInsts[MCInst_getOpcode(MI)].OpInfo;
unsigned short NumOps = ARMInsts[MCInst_getOpcode(MI)].NumOperands;
for (unsigned i = 0; i < NumOps; ++i) {
if (MCOperandInfo_isPredicate(&OpInfo[i])) {
if (CC != ARMCC_AL &&
!MCInst_isPredicable(
&ARMInsts[MCInst_getOpcode(MI)]))
Check(&S, MCDisassembler_SoftFail);
MCOperand_setImm(MCInst_getOperand(MI, i), CC);
if (CC == ARMCC_AL)
MCOperand_setReg(MCInst_getOperand(MI, i + 1),
0);
else
MCOperand_setReg(MCInst_getOperand(MI, i + 1),
ARM_CPSR);
return;
}
}
}
DecodeStatus getThumbInstruction(csh ud, const uint8_t *Bytes, size_t BytesLen,
MCInst *MI, uint16_t *Size, uint64_t Address,
void *Info)
{
// We want to read exactly 2 bytes of data.
if (BytesLen < 2) {
*Size = 0;
return MCDisassembler_Fail;
}
uint16_t Insn16 = endianSensitiveOpcode16(MI, Bytes);
DecodeStatus Result =
decodeInstruction_2(DecoderTableThumb16, MI, Insn16, Address);
if (Result != MCDisassembler_Fail) {
*Size = 2;
Check(&Result, AddThumbPredicate(MI));
return Result;
}
Result = decodeInstruction_2(DecoderTableThumbSBit16, MI, Insn16,
Address);
if (Result) {
*Size = 2;
bool InITBlock = ITBlock_instrInITBlock(&(MI->csh->ITBlock));
Check(&Result, AddThumbPredicate(MI));
AddThumb1SBit(MI, InITBlock);
return Result;
}
Result = decodeInstruction_2(DecoderTableThumb216, MI, Insn16, Address);
if (Result != MCDisassembler_Fail) {
*Size = 2;
// Nested IT blocks are UNPREDICTABLE. Must be checked before we add
// the Thumb predicate.
if (MCInst_getOpcode(MI) == ARM_t2IT &&
ITBlock_instrInITBlock(&(MI->csh->ITBlock)))
Result = MCDisassembler_SoftFail;
Check(&Result, AddThumbPredicate(MI));
// If we find an IT instruction, we need to parse its condition
// code and mask operands so that we can apply them correctly
// to the subsequent instructions.
if (MCInst_getOpcode(MI) == ARM_t2IT) {
unsigned Firstcond =
MCOperand_getImm(MCInst_getOperand(MI, (0)));
unsigned Mask =
MCOperand_getImm(MCInst_getOperand(MI, (1)));
ITBlock_setITState(&(MI->csh->ITBlock), (char)Firstcond,
(char)Mask);
// An IT instruction that would give a 'NV' predicate is
// unpredictable. if (Firstcond == ARMCC_AL && !isPowerOf2_32(Mask))
// SStream_concat0(CS, "unpredictable IT predicate sequence");
}
return Result;
}
// We want to read exactly 4 bytes of data.
if (BytesLen < 4) {
*Size = 0;
return MCDisassembler_Fail;
}
uint32_t Insn32 = (uint32_t)Insn16 << 16 |
endianSensitiveOpcode16(MI, Bytes + 2);
Result = decodeInstruction_4(DecoderTableMVE32, MI, Insn32, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
// Nested VPT blocks are UNPREDICTABLE. Must be checked before we add
// the VPT predicate.
if (isVPTOpcode(MCInst_getOpcode(MI)) &&
VPTBlock_instrInVPTBlock(&(MI->csh->VPTBlock)))
Result = MCDisassembler_SoftFail;
Check(&Result, AddThumbPredicate(MI));
if (isVPTOpcode(MCInst_getOpcode(MI))) {
unsigned Mask =
MCOperand_getImm(MCInst_getOperand(MI, (0)));
VPTBlock_setVPTState(&(MI->csh->VPTBlock), Mask);
}
return Result;
}
Result = decodeInstruction_4(DecoderTableThumb32, MI, Insn32, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
bool InITBlock = ITBlock_instrInITBlock(&(MI->csh->ITBlock));
Check(&Result, AddThumbPredicate(MI));
AddThumb1SBit(MI, InITBlock);
return Result;
}
Result = decodeInstruction_4(DecoderTableThumb232, MI, Insn32, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
Check(&Result, AddThumbPredicate(MI));
return checkDecodedInstruction(MI, Insn32, Result);
}
if (fieldFromInstruction_4(Insn32, 28, 4) == 0xE) {
Result = decodeInstruction_4(DecoderTableVFP32, MI, Insn32,
Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
UpdateThumbVFPPredicate(Result, MI);
return Result;
}
}
Result = decodeInstruction_4(DecoderTableVFPV832, MI, Insn32, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
return Result;
}
if (fieldFromInstruction_4(Insn32, 28, 4) == 0xE) {
Result = decodeInstruction_4(DecoderTableNEONDup32, MI, Insn32,
Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
Check(&Result, AddThumbPredicate(MI));
return Result;
}
}
if (fieldFromInstruction_4(Insn32, 24, 8) == 0xF9) {
uint32_t NEONLdStInsn = Insn32;
NEONLdStInsn &= 0xF0FFFFFF;
NEONLdStInsn |= 0x04000000;
Result = decodeInstruction_4(DecoderTableNEONLoadStore32, MI,
NEONLdStInsn, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
Check(&Result, AddThumbPredicate(MI));
return Result;
}
}
if (fieldFromInstruction_4(Insn32, 24, 4) == 0xF) {
uint32_t NEONDataInsn = Insn32;
NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
NEONDataInsn |= (NEONDataInsn & 0x10000000) >>
4; // Move bit 28 to bit 24
NEONDataInsn |= 0x12000000; // Set bits 28 and 25
Result = decodeInstruction_4(DecoderTableNEONData32, MI,
NEONDataInsn, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
Check(&Result, AddThumbPredicate(MI));
return Result;
}
uint32_t NEONCryptoInsn = Insn32;
NEONCryptoInsn &= 0xF0FFFFFF; // Clear bits 27-24
NEONCryptoInsn |= (NEONCryptoInsn & 0x10000000) >>
4; // Move bit 28 to bit 24
NEONCryptoInsn |= 0x12000000; // Set bits 28 and 25
Result = decodeInstruction_4(DecoderTablev8Crypto32, MI,
NEONCryptoInsn, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
return Result;
}
uint32_t NEONv8Insn = Insn32;
NEONv8Insn &= 0xF3FFFFFF; // Clear bits 27-26
Result = decodeInstruction_4(DecoderTablev8NEON32, MI,
NEONv8Insn, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
return Result;
}
}
uint32_t Coproc = fieldFromInstruction_4(Insn32, 8, 4);
const uint8_t *DecoderTable = ARM_isCDECoproc(Coproc, MI) ?
DecoderTableThumb2CDE32 :
DecoderTableThumb2CoProc32;
Result = decodeInstruction_4(DecoderTable, MI, Insn32, Address);
if (Result != MCDisassembler_Fail) {
*Size = 4;
Check(&Result, AddThumbPredicate(MI));
return Result;
}
*Size = 0;
return MCDisassembler_Fail;
}
static const uint16_t GPRDecoderTable[] = { ARM_R0, ARM_R1, ARM_R2, ARM_R3,
ARM_R4, ARM_R5, ARM_R6, ARM_R7,
ARM_R8, ARM_R9, ARM_R10, ARM_R11,
ARM_R12, ARM_SP, ARM_LR, ARM_PC };
static const uint16_t CLRMGPRDecoderTable[] = {
ARM_R0, ARM_R1, ARM_R2, ARM_R3, ARM_R4, ARM_R5, ARM_R6, ARM_R7,
ARM_R8, ARM_R9, ARM_R10, ARM_R11, ARM_R12, 0, ARM_LR, ARM_APSR
};
static DecodeStatus DecodeGPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 15)
return MCDisassembler_Fail;
unsigned Register = GPRDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static DecodeStatus DecodeCLRMGPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 15)
return MCDisassembler_Fail;
unsigned Register = CLRMGPRDecoderTable[RegNo];
if (Register == 0)
return MCDisassembler_Fail;
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static DecodeStatus DecodeGPRnopcRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if (RegNo == 15)
S = MCDisassembler_SoftFail;
Check(&S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
return S;
}
static DecodeStatus DecodeGPRnospRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if (RegNo == 13)
S = MCDisassembler_SoftFail;
Check(&S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
return S;
}
static DecodeStatus DecodeGPRwithAPSRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if (RegNo == 15) {
MCOperand_CreateReg0(Inst, (ARM_APSR_NZCV));
return MCDisassembler_Success;
}
Check(&S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
return S;
}
static DecodeStatus DecodeGPRwithZRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if (RegNo == 15) {
MCOperand_CreateReg0(Inst, (ARM_ZR));
return MCDisassembler_Success;
}
if (RegNo == 13)
Check(&S, MCDisassembler_SoftFail);
Check(&S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
return S;
}
static DecodeStatus DecodeGPRwithZRnospRegisterClass(MCInst *Inst,
unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if (RegNo == 13)
return MCDisassembler_Fail;
Check(&S, DecodeGPRwithZRRegisterClass(Inst, RegNo, Address, Decoder));
return S;
}
static DecodeStatus DecodetGPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 7)
return MCDisassembler_Fail;
return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
}
static const uint16_t GPRPairDecoderTable[] = { ARM_R0_R1, ARM_R2_R3,
ARM_R4_R5, ARM_R6_R7,
ARM_R8_R9, ARM_R10_R11,
ARM_R12_SP };
static DecodeStatus DecodeGPRPairRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
// According to the Arm ARM RegNo = 14 is undefined, but we return fail
// rather than SoftFail as there is no GPRPair table entry for index 7.
if (RegNo > 13)
return MCDisassembler_Fail;
if (RegNo & 1)
S = MCDisassembler_SoftFail;
unsigned RegisterPair = GPRPairDecoderTable[RegNo / 2];
MCOperand_CreateReg0(Inst, (RegisterPair));
return S;
}
static DecodeStatus DecodeGPRPairnospRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 13)
return MCDisassembler_Fail;
unsigned RegisterPair = GPRPairDecoderTable[RegNo / 2];
MCOperand_CreateReg0(Inst, (RegisterPair));
if ((RegNo & 1) || RegNo > 10)
return MCDisassembler_SoftFail;
return MCDisassembler_Success;
}
static DecodeStatus DecodeGPRspRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo != 13)
return MCDisassembler_Fail;
unsigned Register = GPRDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static DecodeStatus DecodetcGPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
unsigned Register = 0;
switch (RegNo) {
case 0:
Register = ARM_R0;
break;
case 1:
Register = ARM_R1;
break;
case 2:
Register = ARM_R2;
break;
case 3:
Register = ARM_R3;
break;
case 9:
Register = ARM_R9;
break;
case 12:
Register = ARM_R12;
break;
default:
return MCDisassembler_Fail;
}
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static DecodeStatus DecoderGPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if ((RegNo == 13 &&
!ARM_getFeatureBits(Inst->csh->mode, ARM_HasV8Ops)) ||
RegNo == 15)
S = MCDisassembler_SoftFail;
Check(&S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
return S;
}
static const uint16_t SPRDecoderTable[] = {
ARM_S0, ARM_S1, ARM_S2, ARM_S3, ARM_S4, ARM_S5, ARM_S6, ARM_S7,
ARM_S8, ARM_S9, ARM_S10, ARM_S11, ARM_S12, ARM_S13, ARM_S14, ARM_S15,
ARM_S16, ARM_S17, ARM_S18, ARM_S19, ARM_S20, ARM_S21, ARM_S22, ARM_S23,
ARM_S24, ARM_S25, ARM_S26, ARM_S27, ARM_S28, ARM_S29, ARM_S30, ARM_S31
};
static DecodeStatus DecodeSPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 31)
return MCDisassembler_Fail;
unsigned Register = SPRDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static DecodeStatus DecodeHPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
return DecodeSPRRegisterClass(Inst, RegNo, Address, Decoder);
}
static const uint16_t DPRDecoderTable[] = {
ARM_D0, ARM_D1, ARM_D2, ARM_D3, ARM_D4, ARM_D5, ARM_D6, ARM_D7,
ARM_D8, ARM_D9, ARM_D10, ARM_D11, ARM_D12, ARM_D13, ARM_D14, ARM_D15,
ARM_D16, ARM_D17, ARM_D18, ARM_D19, ARM_D20, ARM_D21, ARM_D22, ARM_D23,
ARM_D24, ARM_D25, ARM_D26, ARM_D27, ARM_D28, ARM_D29, ARM_D30, ARM_D31
};
static DecodeStatus DecodeDPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
bool hasD32 = ARM_getFeatureBits(Inst->csh->mode, ARM_FeatureD32);
if (RegNo > 31 || (!hasD32 && RegNo > 15))
return MCDisassembler_Fail;
unsigned Register = DPRDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static DecodeStatus DecodeDPR_8RegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 7)
return MCDisassembler_Fail;
return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
}
static DecodeStatus DecodeSPR_8RegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 15)
return MCDisassembler_Fail;
return DecodeSPRRegisterClass(Inst, RegNo, Address, Decoder);
}
static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 15)
return MCDisassembler_Fail;
return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
}
static const uint16_t QPRDecoderTable[] = {
ARM_Q0, ARM_Q1, ARM_Q2, ARM_Q3, ARM_Q4, ARM_Q5, ARM_Q6, ARM_Q7,
ARM_Q8, ARM_Q9, ARM_Q10, ARM_Q11, ARM_Q12, ARM_Q13, ARM_Q14, ARM_Q15
};
static DecodeStatus DecodeQPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 31 || (RegNo & 1) != 0)
return MCDisassembler_Fail;
RegNo >>= 1;
unsigned Register = QPRDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static const uint16_t DPairDecoderTable[] = {
ARM_Q0, ARM_D1_D2, ARM_Q1, ARM_D3_D4, ARM_Q2, ARM_D5_D6,
ARM_Q3, ARM_D7_D8, ARM_Q4, ARM_D9_D10, ARM_Q5, ARM_D11_D12,
ARM_Q6, ARM_D13_D14, ARM_Q7, ARM_D15_D16, ARM_Q8, ARM_D17_D18,
ARM_Q9, ARM_D19_D20, ARM_Q10, ARM_D21_D22, ARM_Q11, ARM_D23_D24,
ARM_Q12, ARM_D25_D26, ARM_Q13, ARM_D27_D28, ARM_Q14, ARM_D29_D30,
ARM_Q15
};
static DecodeStatus DecodeDPairRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 30)
return MCDisassembler_Fail;
unsigned Register = DPairDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static const uint16_t DPairSpacedDecoderTable[] = {
ARM_D0_D2, ARM_D1_D3, ARM_D2_D4, ARM_D3_D5, ARM_D4_D6,
ARM_D5_D7, ARM_D6_D8, ARM_D7_D9, ARM_D8_D10, ARM_D9_D11,
ARM_D10_D12, ARM_D11_D13, ARM_D12_D14, ARM_D13_D15, ARM_D14_D16,
ARM_D15_D17, ARM_D16_D18, ARM_D17_D19, ARM_D18_D20, ARM_D19_D21,
ARM_D20_D22, ARM_D21_D23, ARM_D22_D24, ARM_D23_D25, ARM_D24_D26,
ARM_D25_D27, ARM_D26_D28, ARM_D27_D29, ARM_D28_D30, ARM_D29_D31
};
static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 29)
return MCDisassembler_Fail;
unsigned Register = DPairSpacedDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static DecodeStatus DecodePredicateOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if (Val == 0xF)
return MCDisassembler_Fail;
// AL predicate is not allowed on Thumb1 branches.
if (MCInst_getOpcode(Inst) == ARM_tBcc && Val == 0xE)
return MCDisassembler_Fail;
if (Val != ARMCC_AL &&
!MCInst_isPredicable(&ARMInsts[MCInst_getOpcode(Inst)]))
Check(&S, MCDisassembler_SoftFail);
MCOperand_CreateImm0(Inst, (Val));
if (Val == ARMCC_AL) {
MCOperand_CreateReg0(Inst, (0));
} else
MCOperand_CreateReg0(Inst, (ARM_CPSR));
return S;
}
static DecodeStatus DecodeCCOutOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
if (Val)
MCOperand_CreateReg0(Inst, (ARM_CPSR));
else
MCOperand_CreateReg0(Inst, (0));
return MCDisassembler_Success;
}
static DecodeStatus DecodeSORegImmOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rm = fieldFromInstruction_4(Val, 0, 4);
unsigned type = fieldFromInstruction_4(Val, 5, 2);
unsigned imm = fieldFromInstruction_4(Val, 7, 5);
// Register-immediate
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
ARM_AM_ShiftOpc Shift = ARM_AM_lsl;
switch (type) {
case 0:
Shift = ARM_AM_lsl;
break;
case 1:
Shift = ARM_AM_lsr;
break;
case 2:
Shift = ARM_AM_asr;
break;
case 3:
Shift = ARM_AM_ror;
break;
}
if (Shift == ARM_AM_ror && imm == 0)
Shift = ARM_AM_rrx;
unsigned Op = Shift | (imm << 3);
MCOperand_CreateImm0(Inst, (Op));
return S;
}
static DecodeStatus DecodeSORegRegOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rm = fieldFromInstruction_4(Val, 0, 4);
unsigned type = fieldFromInstruction_4(Val, 5, 2);
unsigned Rs = fieldFromInstruction_4(Val, 8, 4);
// Register-register
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
return MCDisassembler_Fail;
ARM_AM_ShiftOpc Shift = ARM_AM_lsl;
switch (type) {
case 0:
Shift = ARM_AM_lsl;
break;
case 1:
Shift = ARM_AM_lsr;
break;
case 2:
Shift = ARM_AM_asr;
break;
case 3:
Shift = ARM_AM_ror;
break;
}
MCOperand_CreateImm0(Inst, (Shift));
return S;
}
static DecodeStatus DecodeRegListOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
bool NeedDisjointWriteback = false;
unsigned WritebackReg = 0;
bool CLRM = false;
switch (MCInst_getOpcode(Inst)) {
default:
break;
case ARM_LDMIA_UPD:
case ARM_LDMDB_UPD:
case ARM_LDMIB_UPD:
case ARM_LDMDA_UPD:
case ARM_t2LDMIA_UPD:
case ARM_t2LDMDB_UPD:
case ARM_t2STMIA_UPD:
case ARM_t2STMDB_UPD:
NeedDisjointWriteback = true;
WritebackReg = MCOperand_getReg(MCInst_getOperand(Inst, (0)));
break;
case ARM_t2CLRM:
CLRM = true;
break;
}
// Empty register lists are not allowed.
if (Val == 0)
return MCDisassembler_Fail;
for (unsigned i = 0; i < 16; ++i) {
if (Val & (1 << i)) {
if (CLRM) {
if (!Check(&S, DecodeCLRMGPRRegisterClass(
Inst, i, Address,
Decoder))) {
return MCDisassembler_Fail;
}
} else {
if (!Check(&S, DecodeGPRRegisterClass(Inst, i,
Address,
Decoder)))
return MCDisassembler_Fail;
// Writeback not allowed if Rn is in the target list.
if (NeedDisjointWriteback &&
WritebackReg ==
MCOperand_getReg(&(
Inst->Operands[Inst->size -
1])))
Check(&S, MCDisassembler_SoftFail);
}
}
}
return S;
}
static DecodeStatus DecodeSPRRegListOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Vd = fieldFromInstruction_4(Val, 8, 5);
unsigned regs = fieldFromInstruction_4(Val, 0, 8);
// In case of unpredictable encoding, tweak the operands.
if (regs == 0 || (Vd + regs) > 32) {
regs = Vd + regs > 32 ? 32 - Vd : regs;
regs = regs > 1u ? regs : 1u;
S = MCDisassembler_SoftFail;
}
if (!Check(&S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
return MCDisassembler_Fail;
for (unsigned i = 0; i < (regs - 1); ++i) {
if (!Check(&S, DecodeSPRRegisterClass(Inst, ++Vd, Address,
Decoder)))
return MCDisassembler_Fail;
}
return S;
}
static DecodeStatus DecodeDPRRegListOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Vd = fieldFromInstruction_4(Val, 8, 5);
unsigned regs = fieldFromInstruction_4(Val, 1, 7);
// In case of unpredictable encoding, tweak the operands.
if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
regs = Vd + regs > 32 ? 32 - Vd : regs;
regs = regs > 1u ? regs : 1u;
regs = regs < 16u ? regs : 16u;
S = MCDisassembler_SoftFail;
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
return MCDisassembler_Fail;
for (unsigned i = 0; i < (regs - 1); ++i) {
if (!Check(&S, DecodeDPRRegisterClass(Inst, ++Vd, Address,
Decoder)))
return MCDisassembler_Fail;
}
return S;
}
static DecodeStatus DecodeBitfieldMaskOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
// This operand encodes a mask of contiguous zeros between a specified MSB
// and LSB. To decode it, we create the mask of all bits MSB-and-lower,
// the mask of all bits LSB-and-lower, and then xor them to create
// the mask of that's all ones on [msb, lsb]. Finally we not it to
// create the final mask.
unsigned msb = fieldFromInstruction_4(Val, 5, 5);
unsigned lsb = fieldFromInstruction_4(Val, 0, 5);
DecodeStatus S = MCDisassembler_Success;
if (lsb > msb) {
Check(&S, MCDisassembler_SoftFail);
// The check above will cause the warning for the "potentially undefined
// instruction encoding" but we can't build a bad MCOperand value here
// with a lsb > msb or else printing the MCInst will cause a crash.
lsb = msb;
}
uint32_t msb_mask = 0xFFFFFFFF;
if (msb != 31)
msb_mask = (1U << (msb + 1)) - 1;
uint32_t lsb_mask = (1U << lsb) - 1;
MCOperand_CreateImm0(Inst, (~(msb_mask ^ lsb_mask)));
return S;
}
static DecodeStatus DecodeCopMemInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned P = fieldFromInstruction_4(Insn, 24, 1);
unsigned W = fieldFromInstruction_4(Insn, 21, 1);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
unsigned CRd = fieldFromInstruction_4(Insn, 12, 4);
unsigned coproc = fieldFromInstruction_4(Insn, 8, 4);
unsigned imm = fieldFromInstruction_4(Insn, 0, 8);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned U = fieldFromInstruction_4(Insn, 23, 1);
// Pre-Indexed implies writeback to Rn
bool IsPreIndexed = (P == 1) && (W == 1);
switch (MCInst_getOpcode(Inst)) {
case ARM_LDC_OFFSET:
case ARM_LDC_PRE:
case ARM_LDC_POST:
case ARM_LDC_OPTION:
case ARM_LDCL_OFFSET:
case ARM_LDCL_PRE:
case ARM_LDCL_POST:
case ARM_LDCL_OPTION:
case ARM_STC_OFFSET:
case ARM_STC_PRE:
case ARM_STC_POST:
case ARM_STC_OPTION:
case ARM_STCL_OFFSET:
case ARM_STCL_PRE:
case ARM_STCL_POST:
case ARM_STCL_OPTION:
case ARM_t2LDC_OFFSET:
case ARM_t2LDC_PRE:
case ARM_t2LDC_POST:
case ARM_t2LDC_OPTION:
case ARM_t2LDCL_OFFSET:
case ARM_t2LDCL_PRE:
case ARM_t2LDCL_POST:
case ARM_t2LDCL_OPTION:
case ARM_t2STC_OFFSET:
case ARM_t2STC_PRE:
case ARM_t2STC_POST:
case ARM_t2STC_OPTION:
case ARM_t2STCL_OFFSET:
case ARM_t2STCL_PRE:
case ARM_t2STCL_POST:
case ARM_t2STCL_OPTION:
case ARM_t2LDC2_OFFSET:
case ARM_t2LDC2L_OFFSET:
case ARM_t2LDC2_PRE:
case ARM_t2LDC2L_PRE:
case ARM_t2STC2_OFFSET:
case ARM_t2STC2L_OFFSET:
case ARM_t2STC2_PRE:
case ARM_t2STC2L_PRE:
case ARM_LDC2_OFFSET:
case ARM_LDC2L_OFFSET:
case ARM_LDC2_PRE:
case ARM_LDC2L_PRE:
case ARM_STC2_OFFSET:
case ARM_STC2L_OFFSET:
case ARM_STC2_PRE:
case ARM_STC2L_PRE:
case ARM_t2LDC2_OPTION:
case ARM_t2STC2_OPTION:
case ARM_t2LDC2_POST:
case ARM_t2LDC2L_POST:
case ARM_t2STC2_POST:
case ARM_t2STC2L_POST:
case ARM_LDC2_POST:
case ARM_LDC2L_POST:
case ARM_STC2_POST:
case ARM_STC2L_POST:
if (coproc == 0xA || coproc == 0xB ||
(ARM_getFeatureBits(Inst->csh->mode,
ARM_HasV8_1MMainlineOps) &&
(coproc == 0x8 || coproc == 0x9 || coproc == 0xA ||
coproc == 0xB || coproc == 0xE || coproc == 0xF)))
return MCDisassembler_Fail;
break;
default:
break;
}
if (ARM_getFeatureBits(Inst->csh->mode, ARM_HasV8Ops) && (coproc != 14))
return MCDisassembler_Fail;
if (IsPreIndexed)
// Dummy operand for Rn_wb.
MCOperand_CreateImm0(Inst, (0));
MCOperand_CreateImm0(Inst, (coproc));
MCOperand_CreateImm0(Inst, (CRd));
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDC2_OFFSET:
case ARM_t2LDC2L_OFFSET:
case ARM_t2LDC2_PRE:
case ARM_t2LDC2L_PRE:
case ARM_t2STC2_OFFSET:
case ARM_t2STC2L_OFFSET:
case ARM_t2STC2_PRE:
case ARM_t2STC2L_PRE:
case ARM_LDC2_OFFSET:
case ARM_LDC2L_OFFSET:
case ARM_LDC2_PRE:
case ARM_LDC2L_PRE:
case ARM_STC2_OFFSET:
case ARM_STC2L_OFFSET:
case ARM_STC2_PRE:
case ARM_STC2L_PRE:
case ARM_t2LDC_OFFSET:
case ARM_t2LDCL_OFFSET:
case ARM_t2LDC_PRE:
case ARM_t2LDCL_PRE:
case ARM_t2STC_OFFSET:
case ARM_t2STCL_OFFSET:
case ARM_t2STC_PRE:
case ARM_t2STCL_PRE:
case ARM_LDC_OFFSET:
case ARM_LDCL_OFFSET:
case ARM_LDC_PRE:
case ARM_LDCL_PRE:
case ARM_STC_OFFSET:
case ARM_STCL_OFFSET:
case ARM_STC_PRE:
case ARM_STCL_PRE:
imm = ARM_AM_getAM5Opc(U ? ARM_AM_add : ARM_AM_sub, imm);
MCOperand_CreateImm0(Inst, (imm));
break;
case ARM_t2LDC2_POST:
case ARM_t2LDC2L_POST:
case ARM_t2STC2_POST:
case ARM_t2STC2L_POST:
case ARM_LDC2_POST:
case ARM_LDC2L_POST:
case ARM_STC2_POST:
case ARM_STC2L_POST:
case ARM_t2LDC_POST:
case ARM_t2LDCL_POST:
case ARM_t2STC_POST:
case ARM_t2STCL_POST:
case ARM_LDC_POST:
case ARM_LDCL_POST:
case ARM_STC_POST:
case ARM_STCL_POST:
imm |= U << 8;
// fall through
default:
// The 'option' variant doesn't encode 'U' in the immediate since
// the immediate is unsigned [0,255].
MCOperand_CreateImm0(Inst, (imm));
break;
}
switch (MCInst_getOpcode(Inst)) {
case ARM_LDC_OFFSET:
case ARM_LDC_PRE:
case ARM_LDC_POST:
case ARM_LDC_OPTION:
case ARM_LDCL_OFFSET:
case ARM_LDCL_PRE:
case ARM_LDCL_POST:
case ARM_LDCL_OPTION:
case ARM_STC_OFFSET:
case ARM_STC_PRE:
case ARM_STC_POST:
case ARM_STC_OPTION:
case ARM_STCL_OFFSET:
case ARM_STCL_PRE:
case ARM_STCL_POST:
case ARM_STCL_OPTION:
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address,
Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
return S;
}
static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
unsigned reg = fieldFromInstruction_4(Insn, 25, 1);
unsigned P = fieldFromInstruction_4(Insn, 24, 1);
unsigned W = fieldFromInstruction_4(Insn, 21, 1);
// On stores, the writeback operand precedes Rt.
switch (MCInst_getOpcode(Inst)) {
case ARM_STR_POST_IMM:
case ARM_STR_POST_REG:
case ARM_STRB_POST_IMM:
case ARM_STRB_POST_REG:
case ARM_STRT_POST_REG:
case ARM_STRT_POST_IMM:
case ARM_STRBT_POST_REG:
case ARM_STRBT_POST_IMM:
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
// On loads, the writeback operand comes after Rt.
switch (MCInst_getOpcode(Inst)) {
case ARM_LDR_POST_IMM:
case ARM_LDR_POST_REG:
case ARM_LDRB_POST_IMM:
case ARM_LDRB_POST_REG:
case ARM_LDRBT_POST_REG:
case ARM_LDRBT_POST_IMM:
case ARM_LDRT_POST_REG:
case ARM_LDRT_POST_IMM:
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
ARM_AM_AddrOpc Op = ARM_AM_add;
if (!fieldFromInstruction_4(Insn, 23, 1))
Op = ARM_AM_sub;
bool writeback = (P == 0) || (W == 1);
unsigned idx_mode = 0;
if (P && writeback)
idx_mode = ARMII_IndexModePre;
else if (!P && writeback)
idx_mode = ARMII_IndexModePost;
if (writeback && (Rn == 15 || Rn == Rt))
S = MCDisassembler_SoftFail; // UNPREDICTABLE
if (reg) {
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rm, Address,
Decoder)))
return MCDisassembler_Fail;
ARM_AM_ShiftOpc Opc = ARM_AM_lsl;
switch (fieldFromInstruction_4(Insn, 5, 2)) {
case 0:
Opc = ARM_AM_lsl;
break;
case 1:
Opc = ARM_AM_lsr;
break;
case 2:
Opc = ARM_AM_asr;
break;
case 3:
Opc = ARM_AM_ror;
break;
default:
return MCDisassembler_Fail;
}
unsigned amt = fieldFromInstruction_4(Insn, 7, 5);
if (Opc == ARM_AM_ror && amt == 0)
Opc = ARM_AM_rrx;
imm = ARM_AM_getAM2Opc(Op, amt, Opc, idx_mode);
MCOperand_CreateImm0(Inst, (imm));
} else {
MCOperand_CreateReg0(Inst, (0));
unsigned tmp = ARM_AM_getAM2Opc(Op, imm, ARM_AM_lsl, idx_mode);
MCOperand_CreateImm0(Inst, (tmp));
}
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeSORegMemOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 13, 4);
unsigned Rm = fieldFromInstruction_4(Val, 0, 4);
unsigned type = fieldFromInstruction_4(Val, 5, 2);
unsigned imm = fieldFromInstruction_4(Val, 7, 5);
unsigned U = fieldFromInstruction_4(Val, 12, 1);
ARM_AM_ShiftOpc ShOp = ARM_AM_lsl;
switch (type) {
case 0:
ShOp = ARM_AM_lsl;
break;
case 1:
ShOp = ARM_AM_lsr;
break;
case 2:
ShOp = ARM_AM_asr;
break;
case 3:
ShOp = ARM_AM_ror;
break;
}
if (ShOp == ARM_AM_ror && imm == 0)
ShOp = ARM_AM_rrx;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
unsigned shift;
if (U)
shift = ARM_AM_getAM2Opc(ARM_AM_add, imm, ShOp, 0);
else
shift = ARM_AM_getAM2Opc(ARM_AM_sub, imm, ShOp, 0);
MCOperand_CreateImm0(Inst, (shift));
return S;
}
static DecodeStatus DecodeTSBInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
if (MCInst_getOpcode(Inst) != ARM_TSB &&
MCInst_getOpcode(Inst) != ARM_t2TSB)
return MCDisassembler_Fail;
// The "csync" operand is not encoded into the "tsb" instruction (as this is
// the only available operand), but LLVM expects the instruction to have one
// operand, so we need to add the csync when decoding.
MCOperand_CreateImm0(Inst, (ARM_TSB_CSYNC));
return MCDisassembler_Success;
}
static DecodeStatus DecodeAddrMode3Instruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned type = fieldFromInstruction_4(Insn, 22, 1);
unsigned imm = fieldFromInstruction_4(Insn, 8, 4);
unsigned U = ((~fieldFromInstruction_4(Insn, 23, 1)) & 1) << 8;
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
unsigned W = fieldFromInstruction_4(Insn, 21, 1);
unsigned P = fieldFromInstruction_4(Insn, 24, 1);
unsigned Rt2 = Rt + 1;
bool writeback = (W == 1) | (P == 0);
// For {LD,ST}RD, Rt must be even, else undefined.
switch (MCInst_getOpcode(Inst)) {
case ARM_STRD:
case ARM_STRD_PRE:
case ARM_STRD_POST:
case ARM_LDRD:
case ARM_LDRD_PRE:
case ARM_LDRD_POST:
if (Rt & 0x1)
S = MCDisassembler_SoftFail;
break;
default:
break;
}
switch (MCInst_getOpcode(Inst)) {
case ARM_STRD:
case ARM_STRD_PRE:
case ARM_STRD_POST:
if (P == 0 && W == 1)
S = MCDisassembler_SoftFail;
if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
S = MCDisassembler_SoftFail;
if (type && Rm == 15)
S = MCDisassembler_SoftFail;
if (Rt2 == 15)
S = MCDisassembler_SoftFail;
if (!type && fieldFromInstruction_4(Insn, 8, 4))
S = MCDisassembler_SoftFail;
break;
case ARM_STRH:
case ARM_STRH_PRE:
case ARM_STRH_POST:
if (Rt == 15)
S = MCDisassembler_SoftFail;
if (writeback && (Rn == 15 || Rn == Rt))
S = MCDisassembler_SoftFail;
if (!type && Rm == 15)
S = MCDisassembler_SoftFail;
break;
case ARM_LDRD:
case ARM_LDRD_PRE:
case ARM_LDRD_POST:
if (type && Rn == 15) {
if (Rt2 == 15)
S = MCDisassembler_SoftFail;
break;
}
if (P == 0 && W == 1)
S = MCDisassembler_SoftFail;
if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
S = MCDisassembler_SoftFail;
if (!type && writeback && Rn == 15)
S = MCDisassembler_SoftFail;
if (writeback && (Rn == Rt || Rn == Rt2))
S = MCDisassembler_SoftFail;
break;
case ARM_LDRH:
case ARM_LDRH_PRE:
case ARM_LDRH_POST:
if (type && Rn == 15) {
if (Rt == 15)
S = MCDisassembler_SoftFail;
break;
}
if (Rt == 15)
S = MCDisassembler_SoftFail;
if (!type && Rm == 15)
S = MCDisassembler_SoftFail;
if (!type && writeback && (Rn == 15 || Rn == Rt))
S = MCDisassembler_SoftFail;
break;
case ARM_LDRSH:
case ARM_LDRSH_PRE:
case ARM_LDRSH_POST:
case ARM_LDRSB:
case ARM_LDRSB_PRE:
case ARM_LDRSB_POST:
if (type && Rn == 15) {
if (Rt == 15)
S = MCDisassembler_SoftFail;
break;
}
if (type && (Rt == 15 || (writeback && Rn == Rt)))
S = MCDisassembler_SoftFail;
if (!type && (Rt == 15 || Rm == 15))
S = MCDisassembler_SoftFail;
if (!type && writeback && (Rn == 15 || Rn == Rt))
S = MCDisassembler_SoftFail;
break;
default:
break;
}
if (writeback) { // Writeback
if (P)
U |= ARMII_IndexModePre << 9;
else
U |= ARMII_IndexModePost << 9;
// On stores, the writeback operand precedes Rt.
switch (MCInst_getOpcode(Inst)) {
case ARM_STRD:
case ARM_STRD_PRE:
case ARM_STRD_POST:
case ARM_STRH:
case ARM_STRH_PRE:
case ARM_STRH_POST:
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address,
Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
switch (MCInst_getOpcode(Inst)) {
case ARM_STRD:
case ARM_STRD_PRE:
case ARM_STRD_POST:
case ARM_LDRD:
case ARM_LDRD_PRE:
case ARM_LDRD_POST:
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt + 1, Address,
Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
if (writeback) {
// On loads, the writeback operand comes after Rt.
switch (MCInst_getOpcode(Inst)) {
case ARM_LDRD:
case ARM_LDRD_PRE:
case ARM_LDRD_POST:
case ARM_LDRH:
case ARM_LDRH_PRE:
case ARM_LDRH_POST:
case ARM_LDRSH:
case ARM_LDRSH_PRE:
case ARM_LDRSH_POST:
case ARM_LDRSB:
case ARM_LDRSB_PRE:
case ARM_LDRSB_POST:
case ARM_LDRHTr:
case ARM_LDRSBTr:
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address,
Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (type) {
MCOperand_CreateReg0(Inst, (0));
MCOperand_CreateImm0(Inst, (U | (imm << 4) | Rm));
} else {
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (U));
}
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeRFEInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned mode = fieldFromInstruction_4(Insn, 23, 2);
switch (mode) {
case 0:
mode = ARM_AM_da;
break;
case 1:
mode = ARM_AM_ia;
break;
case 2:
mode = ARM_AM_db;
break;
case 3:
mode = ARM_AM_ib;
break;
}
MCOperand_CreateImm0(Inst, (mode));
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeQADDInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
if (pred == 0xF)
return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst *Inst,
unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
unsigned reglist = fieldFromInstruction_4(Insn, 0, 16);
if (pred == 0xF) {
// Ambiguous with RFE and SRS
switch (MCInst_getOpcode(Inst)) {
case ARM_LDMDA:
MCInst_setOpcode(Inst, (ARM_RFEDA));
break;
case ARM_LDMDA_UPD:
MCInst_setOpcode(Inst, (ARM_RFEDA_UPD));
break;
case ARM_LDMDB:
MCInst_setOpcode(Inst, (ARM_RFEDB));
break;
case ARM_LDMDB_UPD:
MCInst_setOpcode(Inst, (ARM_RFEDB_UPD));
break;
case ARM_LDMIA:
MCInst_setOpcode(Inst, (ARM_RFEIA));
break;
case ARM_LDMIA_UPD:
MCInst_setOpcode(Inst, (ARM_RFEIA_UPD));
break;
case ARM_LDMIB:
MCInst_setOpcode(Inst, (ARM_RFEIB));
break;
case ARM_LDMIB_UPD:
MCInst_setOpcode(Inst, (ARM_RFEIB_UPD));
break;
case ARM_STMDA:
MCInst_setOpcode(Inst, (ARM_SRSDA));
break;
case ARM_STMDA_UPD:
MCInst_setOpcode(Inst, (ARM_SRSDA_UPD));
break;
case ARM_STMDB:
MCInst_setOpcode(Inst, (ARM_SRSDB));
break;
case ARM_STMDB_UPD:
MCInst_setOpcode(Inst, (ARM_SRSDB_UPD));
break;
case ARM_STMIA:
MCInst_setOpcode(Inst, (ARM_SRSIA));
break;
case ARM_STMIA_UPD:
MCInst_setOpcode(Inst, (ARM_SRSIA_UPD));
break;
case ARM_STMIB:
MCInst_setOpcode(Inst, (ARM_SRSIB));
break;
case ARM_STMIB_UPD:
MCInst_setOpcode(Inst, (ARM_SRSIB_UPD));
break;
default:
return MCDisassembler_Fail;
}
// For stores (which become SRS's, the only operand is the mode.
if (fieldFromInstruction_4(Insn, 20, 1) == 0) {
// Check SRS encoding constraints
if (!(fieldFromInstruction_4(Insn, 22, 1) == 1 &&
fieldFromInstruction_4(Insn, 20, 1) == 0))
return MCDisassembler_Fail;
MCOperand_CreateImm0(
Inst, (fieldFromInstruction_4(Insn, 0, 4)));
return S;
}
return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail; // Tied
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
// Check for UNPREDICTABLE predicated ESB instruction
static DecodeStatus DecodeHINTInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
unsigned imm8 = fieldFromInstruction_4(Insn, 0, 8);
DecodeStatus S = MCDisassembler_Success;
MCOperand_CreateImm0(Inst, (imm8));
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
// ESB is unpredictable if pred != AL. Without the RAS extension, it is a
// NOP, so all predicates should be allowed.
if (imm8 == 0x10 && pred != 0xe &&
((ARM_getFeatureBits(Inst->csh->mode, ARM_FeatureRAS)) != 0))
S = MCDisassembler_SoftFail;
return S;
}
static DecodeStatus DecodeCPSInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
unsigned imod = fieldFromInstruction_4(Insn, 18, 2);
unsigned M = fieldFromInstruction_4(Insn, 17, 1);
unsigned iflags = fieldFromInstruction_4(Insn, 6, 3);
unsigned mode = fieldFromInstruction_4(Insn, 0, 5);
DecodeStatus S = MCDisassembler_Success;
// This decoder is called from multiple location that do not check
// the full encoding is valid before they do.
if (fieldFromInstruction_4(Insn, 5, 1) != 0 ||
fieldFromInstruction_4(Insn, 16, 1) != 0 ||
fieldFromInstruction_4(Insn, 20, 8) != 0x10)
return MCDisassembler_Fail;
// imod == '01' --> UNPREDICTABLE
// NOTE: Even though this is technically UNPREDICTABLE, we choose to
// return failure here. The '01' imod value is unprintable, so there's
// nothing useful we could do even if we returned UNPREDICTABLE.
if (imod == 1)
return MCDisassembler_Fail;
if (imod && M) {
MCInst_setOpcode(Inst, (ARM_CPS3p));
MCOperand_CreateImm0(Inst, (imod));
MCOperand_CreateImm0(Inst, (iflags));
MCOperand_CreateImm0(Inst, (mode));
} else if (imod && !M) {
MCInst_setOpcode(Inst, (ARM_CPS2p));
MCOperand_CreateImm0(Inst, (imod));
MCOperand_CreateImm0(Inst, (iflags));
if (mode)
S = MCDisassembler_SoftFail;
} else if (!imod && M) {
MCInst_setOpcode(Inst, (ARM_CPS1p));
MCOperand_CreateImm0(Inst, (mode));
if (iflags)
S = MCDisassembler_SoftFail;
} else {
// imod == '00' && M == '0' --> UNPREDICTABLE
MCInst_setOpcode(Inst, (ARM_CPS1p));
MCOperand_CreateImm0(Inst, (mode));
S = MCDisassembler_SoftFail;
}
return S;
}
static DecodeStatus DecodeT2CPSInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
unsigned imod = fieldFromInstruction_4(Insn, 9, 2);
unsigned M = fieldFromInstruction_4(Insn, 8, 1);
unsigned iflags = fieldFromInstruction_4(Insn, 5, 3);
unsigned mode = fieldFromInstruction_4(Insn, 0, 5);
DecodeStatus S = MCDisassembler_Success;
// imod == '01' --> UNPREDICTABLE
// NOTE: Even though this is technically UNPREDICTABLE, we choose to
// return failure here. The '01' imod value is unprintable, so there's
// nothing useful we could do even if we returned UNPREDICTABLE.
if (imod == 1)
return MCDisassembler_Fail;
if (imod && M) {
MCInst_setOpcode(Inst, (ARM_t2CPS3p));
MCOperand_CreateImm0(Inst, (imod));
MCOperand_CreateImm0(Inst, (iflags));
MCOperand_CreateImm0(Inst, (mode));
} else if (imod && !M) {
MCInst_setOpcode(Inst, (ARM_t2CPS2p));
MCOperand_CreateImm0(Inst, (imod));
MCOperand_CreateImm0(Inst, (iflags));
if (mode)
S = MCDisassembler_SoftFail;
} else if (!imod && M) {
MCInst_setOpcode(Inst, (ARM_t2CPS1p));
MCOperand_CreateImm0(Inst, (mode));
if (iflags)
S = MCDisassembler_SoftFail;
} else {
// imod == '00' && M == '0' --> this is a HINT instruction
int imm = fieldFromInstruction_4(Insn, 0, 8);
// HINT are defined only for immediate in [0..4]
if (imm > 4)
return MCDisassembler_Fail;
MCInst_setOpcode(Inst, (ARM_t2HINT));
MCOperand_CreateImm0(Inst, (imm));
}
return S;
}
static DecodeStatus DecodeT2HintSpaceInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
unsigned imm = fieldFromInstruction_4(Insn, 0, 8);
unsigned Opcode = ARM_t2HINT;
if (imm == 0x0D) {
Opcode = ARM_t2PACBTI;
} else if (imm == 0x1D) {
Opcode = ARM_t2PAC;
} else if (imm == 0x2D) {
Opcode = ARM_t2AUT;
} else if (imm == 0x0F) {
Opcode = ARM_t2BTI;
}
MCInst_setOpcode(Inst, (Opcode));
if (Opcode == ARM_t2HINT) {
MCOperand_CreateImm0(Inst, (imm));
}
return MCDisassembler_Success;
}
static DecodeStatus DecodeT2MOVTWInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 8, 4);
unsigned imm = 0;
imm |= (fieldFromInstruction_4(Insn, 0, 8) << 0);
imm |= (fieldFromInstruction_4(Insn, 12, 3) << 8);
imm |= (fieldFromInstruction_4(Insn, 16, 4) << 12);
imm |= (fieldFromInstruction_4(Insn, 26, 1) << 11);
if (MCInst_getOpcode(Inst) == ARM_t2MOVTi16)
if (!Check(&S,
DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
MCOperand_CreateImm0(Inst, (imm));
return S;
}
static DecodeStatus DecodeArmMOVTWInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
unsigned imm = 0;
imm |= (fieldFromInstruction_4(Insn, 0, 12) << 0);
imm |= (fieldFromInstruction_4(Insn, 16, 4) << 12);
if (MCInst_getOpcode(Inst) == ARM_MOVTi16)
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rd, Address,
Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
MCOperand_CreateImm0(Inst, (imm));
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeSMLAInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 8, 4);
unsigned Ra = fieldFromInstruction_4(Insn, 12, 4);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
if (pred == 0xF)
return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeTSTInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Pred = fieldFromInstruction_4(Insn, 28, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
if (Pred == 0xF)
return DecodeSETPANInstruction(Inst, Insn, Address, Decoder);
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, Pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeSETPANInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Imm = fieldFromInstruction_4(Insn, 9, 1);
if (!ARM_getFeatureBits(Inst->csh->mode, ARM_HasV8_1aOps) ||
!ARM_getFeatureBits(Inst->csh->mode, ARM_HasV8Ops))
return MCDisassembler_Fail;
// Decoder can be called from DecodeTST, which does not check the full
// encoding is valid.
if (fieldFromInstruction_4(Insn, 20, 12) != 0xf11 ||
fieldFromInstruction_4(Insn, 4, 4) != 0)
return MCDisassembler_Fail;
if (fieldFromInstruction_4(Insn, 10, 10) != 0 ||
fieldFromInstruction_4(Insn, 0, 4) != 0)
S = MCDisassembler_SoftFail;
MCInst_setOpcode(Inst, (ARM_SETPAN));
MCOperand_CreateImm0(Inst, (Imm));
return S;
}
static DecodeStatus DecodeAddrModeImm12Operand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned add = fieldFromInstruction_4(Val, 12, 1);
unsigned imm = fieldFromInstruction_4(Val, 0, 12);
unsigned Rn = fieldFromInstruction_4(Val, 13, 4);
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!add)
imm *= -1;
if (imm == 0 && !add)
imm = INT32_MIN;
MCOperand_CreateImm0(Inst, (imm));
if (Rn == 15)
tryAddingPcLoadReferenceComment(Address, Address + imm + 8,
Decoder);
return S;
}
static DecodeStatus DecodeAddrMode5Operand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 9, 4);
// U == 1 to add imm, 0 to subtract it.
unsigned U = fieldFromInstruction_4(Val, 8, 1);
unsigned imm = fieldFromInstruction_4(Val, 0, 8);
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (U)
MCOperand_CreateImm0(Inst, (ARM_AM_getAM5Opc(ARM_AM_add, imm)));
else
MCOperand_CreateImm0(Inst, (ARM_AM_getAM5Opc(ARM_AM_sub, imm)));
return S;
}
static DecodeStatus DecodeAddrMode5FP16Operand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 9, 4);
// U == 1 to add imm, 0 to subtract it.
unsigned U = fieldFromInstruction_4(Val, 8, 1);
unsigned imm = fieldFromInstruction_4(Val, 0, 8);
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (U)
MCOperand_CreateImm0(Inst,
(ARM_AM_getAM5FP16Opc(ARM_AM_add, imm)));
else
MCOperand_CreateImm0(Inst,
(ARM_AM_getAM5FP16Opc(ARM_AM_sub, imm)));
return S;
}
static DecodeStatus DecodeAddrMode7Operand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
}
static DecodeStatus DecodeT2BInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus Status = MCDisassembler_Success;
// Note the J1 and J2 values are from the encoded instruction. So here
// change them to I1 and I2 values via as documented:
// I1 = NOT(J1 EOR S);
// I2 = NOT(J2 EOR S);
// and build the imm32 with one trailing zero as documented:
// imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
unsigned S = fieldFromInstruction_4(Insn, 26, 1);
unsigned J1 = fieldFromInstruction_4(Insn, 13, 1);
unsigned J2 = fieldFromInstruction_4(Insn, 11, 1);
unsigned I1 = !(J1 ^ S);
unsigned I2 = !(J2 ^ S);
unsigned imm10 = fieldFromInstruction_4(Insn, 16, 10);
unsigned imm11 = fieldFromInstruction_4(Insn, 0, 11);
unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) |
imm11;
int imm32 = SignExtend32((tmp << 1), 25);
if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4, true, 4,
Inst, Decoder))
MCOperand_CreateImm0(Inst, (imm32));
return Status;
}
static DecodeStatus DecodeBranchImmInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
unsigned imm = fieldFromInstruction_4(Insn, 0, 24) << 2;
if (pred == 0xF) {
MCInst_setOpcode(Inst, (ARM_BLXi));
imm |= fieldFromInstruction_4(Insn, 24, 1) << 1;
if (!tryAddingSymbolicOperand(
Address, Address + SignExtend32((imm), 26) + 8,
true, 4, Inst, Decoder))
MCOperand_CreateImm0(Inst, (SignExtend32((imm), 26)));
return S;
}
if (!tryAddingSymbolicOperand(Address,
Address + SignExtend32((imm), 26) + 8,
true, 4, Inst, Decoder))
MCOperand_CreateImm0(Inst, (SignExtend32((imm), 26)));
// We already have BL_pred for BL w/ predicate, no need to add addition
// predicate opreands for BL
if (MCInst_getOpcode(Inst) != ARM_BL)
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address,
Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeAddrMode6Operand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rm = fieldFromInstruction_4(Val, 0, 4);
unsigned align = fieldFromInstruction_4(Val, 4, 2);
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
if (!align)
MCOperand_CreateImm0(Inst, (0));
else
MCOperand_CreateImm0(Inst, (4 << align));
return S;
}
static DecodeStatus DecodeVLDInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned wb = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
Rn |= fieldFromInstruction_4(Insn, 4, 2) << 4;
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
// First output register
switch (MCInst_getOpcode(Inst)) {
case ARM_VLD1q16:
case ARM_VLD1q32:
case ARM_VLD1q64:
case ARM_VLD1q8:
case ARM_VLD1q16wb_fixed:
case ARM_VLD1q16wb_register:
case ARM_VLD1q32wb_fixed:
case ARM_VLD1q32wb_register:
case ARM_VLD1q64wb_fixed:
case ARM_VLD1q64wb_register:
case ARM_VLD1q8wb_fixed:
case ARM_VLD1q8wb_register:
case ARM_VLD2d16:
case ARM_VLD2d32:
case ARM_VLD2d8:
case ARM_VLD2d16wb_fixed:
case ARM_VLD2d16wb_register:
case ARM_VLD2d32wb_fixed:
case ARM_VLD2d32wb_register:
case ARM_VLD2d8wb_fixed:
case ARM_VLD2d8wb_register:
if (!Check(&S, DecodeDPairRegisterClass(Inst, Rd, Address,
Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VLD2b16:
case ARM_VLD2b32:
case ARM_VLD2b8:
case ARM_VLD2b16wb_fixed:
case ARM_VLD2b16wb_register:
case ARM_VLD2b32wb_fixed:
case ARM_VLD2b32wb_register:
case ARM_VLD2b8wb_fixed:
case ARM_VLD2b8wb_register:
if (!Check(&S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address,
Decoder)))
return MCDisassembler_Fail;
break;
default:
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
}
// Second output register
switch (MCInst_getOpcode(Inst)) {
case ARM_VLD3d8:
case ARM_VLD3d16:
case ARM_VLD3d32:
case ARM_VLD3d8_UPD:
case ARM_VLD3d16_UPD:
case ARM_VLD3d32_UPD:
case ARM_VLD4d8:
case ARM_VLD4d16:
case ARM_VLD4d32:
case ARM_VLD4d8_UPD:
case ARM_VLD4d16_UPD:
case ARM_VLD4d32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 1) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VLD3q8:
case ARM_VLD3q16:
case ARM_VLD3q32:
case ARM_VLD3q8_UPD:
case ARM_VLD3q16_UPD:
case ARM_VLD3q32_UPD:
case ARM_VLD4q8:
case ARM_VLD4q16:
case ARM_VLD4q32:
case ARM_VLD4q8_UPD:
case ARM_VLD4q16_UPD:
case ARM_VLD4q32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 2) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
// Third output register
switch (MCInst_getOpcode(Inst)) {
case ARM_VLD3d8:
case ARM_VLD3d16:
case ARM_VLD3d32:
case ARM_VLD3d8_UPD:
case ARM_VLD3d16_UPD:
case ARM_VLD3d32_UPD:
case ARM_VLD4d8:
case ARM_VLD4d16:
case ARM_VLD4d32:
case ARM_VLD4d8_UPD:
case ARM_VLD4d16_UPD:
case ARM_VLD4d32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 2) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VLD3q8:
case ARM_VLD3q16:
case ARM_VLD3q32:
case ARM_VLD3q8_UPD:
case ARM_VLD3q16_UPD:
case ARM_VLD3q32_UPD:
case ARM_VLD4q8:
case ARM_VLD4q16:
case ARM_VLD4q32:
case ARM_VLD4q8_UPD:
case ARM_VLD4q16_UPD:
case ARM_VLD4q32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 4) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
// Fourth output register
switch (MCInst_getOpcode(Inst)) {
case ARM_VLD4d8:
case ARM_VLD4d16:
case ARM_VLD4d32:
case ARM_VLD4d8_UPD:
case ARM_VLD4d16_UPD:
case ARM_VLD4d32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 3) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VLD4q8:
case ARM_VLD4q16:
case ARM_VLD4q32:
case ARM_VLD4q8_UPD:
case ARM_VLD4q16_UPD:
case ARM_VLD4q32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 6) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
// Writeback operand
switch (MCInst_getOpcode(Inst)) {
case ARM_VLD1d8wb_fixed:
case ARM_VLD1d16wb_fixed:
case ARM_VLD1d32wb_fixed:
case ARM_VLD1d64wb_fixed:
case ARM_VLD1d8wb_register:
case ARM_VLD1d16wb_register:
case ARM_VLD1d32wb_register:
case ARM_VLD1d64wb_register:
case ARM_VLD1q8wb_fixed:
case ARM_VLD1q16wb_fixed:
case ARM_VLD1q32wb_fixed:
case ARM_VLD1q64wb_fixed:
case ARM_VLD1q8wb_register:
case ARM_VLD1q16wb_register:
case ARM_VLD1q32wb_register:
case ARM_VLD1q64wb_register:
case ARM_VLD1d8Twb_fixed:
case ARM_VLD1d8Twb_register:
case ARM_VLD1d16Twb_fixed:
case ARM_VLD1d16Twb_register:
case ARM_VLD1d32Twb_fixed:
case ARM_VLD1d32Twb_register:
case ARM_VLD1d64Twb_fixed:
case ARM_VLD1d64Twb_register:
case ARM_VLD1d8Qwb_fixed:
case ARM_VLD1d8Qwb_register:
case ARM_VLD1d16Qwb_fixed:
case ARM_VLD1d16Qwb_register:
case ARM_VLD1d32Qwb_fixed:
case ARM_VLD1d32Qwb_register:
case ARM_VLD1d64Qwb_fixed:
case ARM_VLD1d64Qwb_register:
case ARM_VLD2d8wb_fixed:
case ARM_VLD2d16wb_fixed:
case ARM_VLD2d32wb_fixed:
case ARM_VLD2q8wb_fixed:
case ARM_VLD2q16wb_fixed:
case ARM_VLD2q32wb_fixed:
case ARM_VLD2d8wb_register:
case ARM_VLD2d16wb_register:
case ARM_VLD2d32wb_register:
case ARM_VLD2q8wb_register:
case ARM_VLD2q16wb_register:
case ARM_VLD2q32wb_register:
case ARM_VLD2b8wb_fixed:
case ARM_VLD2b16wb_fixed:
case ARM_VLD2b32wb_fixed:
case ARM_VLD2b8wb_register:
case ARM_VLD2b16wb_register:
case ARM_VLD2b32wb_register:
MCOperand_CreateImm0(Inst, (0));
break;
case ARM_VLD3d8_UPD:
case ARM_VLD3d16_UPD:
case ARM_VLD3d32_UPD:
case ARM_VLD3q8_UPD:
case ARM_VLD3q16_UPD:
case ARM_VLD3q32_UPD:
case ARM_VLD4d8_UPD:
case ARM_VLD4d16_UPD:
case ARM_VLD4d32_UPD:
case ARM_VLD4q8_UPD:
case ARM_VLD4q16_UPD:
case ARM_VLD4q32_UPD:
if (!Check(&S,
DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
// AddrMode6 Base (register+alignment)
if (!Check(&S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
// AddrMode6 Offset (register)
switch (MCInst_getOpcode(Inst)) {
default:
// The below have been updated to have explicit am6offset split
// between fixed and register offset. For those instructions not
// yet updated, we need to add an additional reg0 operand for the
// fixed variant.
//
// The fixed offset encodes as Rm == 0xd, so we check for that.
if (Rm == 0xd) {
MCOperand_CreateReg0(Inst, (0));
break;
}
// Fall through to handle the register offset variant.
// fall through
case ARM_VLD1d8wb_fixed:
case ARM_VLD1d16wb_fixed:
case ARM_VLD1d32wb_fixed:
case ARM_VLD1d64wb_fixed:
case ARM_VLD1d8Twb_fixed:
case ARM_VLD1d16Twb_fixed:
case ARM_VLD1d32Twb_fixed:
case ARM_VLD1d64Twb_fixed:
case ARM_VLD1d8Qwb_fixed:
case ARM_VLD1d16Qwb_fixed:
case ARM_VLD1d32Qwb_fixed:
case ARM_VLD1d64Qwb_fixed:
case ARM_VLD1d8wb_register:
case ARM_VLD1d16wb_register:
case ARM_VLD1d32wb_register:
case ARM_VLD1d64wb_register:
case ARM_VLD1q8wb_fixed:
case ARM_VLD1q16wb_fixed:
case ARM_VLD1q32wb_fixed:
case ARM_VLD1q64wb_fixed:
case ARM_VLD1q8wb_register:
case ARM_VLD1q16wb_register:
case ARM_VLD1q32wb_register:
case ARM_VLD1q64wb_register:
// The fixed offset post-increment encodes Rm == 0xd. The no-writeback
// variant encodes Rm == 0xf. Anything else is a register offset post-
// increment and we need to add the register operand to the instruction.
if (Rm != 0xD && Rm != 0xF &&
!Check(&S,
DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VLD2d8wb_fixed:
case ARM_VLD2d16wb_fixed:
case ARM_VLD2d32wb_fixed:
case ARM_VLD2b8wb_fixed:
case ARM_VLD2b16wb_fixed:
case ARM_VLD2b32wb_fixed:
case ARM_VLD2q8wb_fixed:
case ARM_VLD2q16wb_fixed:
case ARM_VLD2q32wb_fixed:
break;
}
return S;
}
static DecodeStatus DecodeVLDST1Instruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
unsigned type = fieldFromInstruction_4(Insn, 8, 4);
unsigned align = fieldFromInstruction_4(Insn, 4, 2);
if (type == 6 && (align & 2))
return MCDisassembler_Fail;
if (type == 7 && (align & 2))
return MCDisassembler_Fail;
if (type == 10 && align == 3)
return MCDisassembler_Fail;
unsigned load = fieldFromInstruction_4(Insn, 21, 1);
return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) :
DecodeVSTInstruction(Inst, Insn, Address, Decoder);
}
static DecodeStatus DecodeVLDST2Instruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
unsigned size = fieldFromInstruction_4(Insn, 6, 2);
if (size == 3)
return MCDisassembler_Fail;
unsigned type = fieldFromInstruction_4(Insn, 8, 4);
unsigned align = fieldFromInstruction_4(Insn, 4, 2);
if (type == 8 && align == 3)
return MCDisassembler_Fail;
if (type == 9 && align == 3)
return MCDisassembler_Fail;
unsigned load = fieldFromInstruction_4(Insn, 21, 1);
return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) :
DecodeVSTInstruction(Inst, Insn, Address, Decoder);
}
static DecodeStatus DecodeVLDST3Instruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
unsigned size = fieldFromInstruction_4(Insn, 6, 2);
if (size == 3)
return MCDisassembler_Fail;
unsigned align = fieldFromInstruction_4(Insn, 4, 2);
if (align & 2)
return MCDisassembler_Fail;
unsigned load = fieldFromInstruction_4(Insn, 21, 1);
return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) :
DecodeVSTInstruction(Inst, Insn, Address, Decoder);
}
static DecodeStatus DecodeVLDST4Instruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
unsigned size = fieldFromInstruction_4(Insn, 6, 2);
if (size == 3)
return MCDisassembler_Fail;
unsigned load = fieldFromInstruction_4(Insn, 21, 1);
return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder) :
DecodeVSTInstruction(Inst, Insn, Address, Decoder);
}
static DecodeStatus DecodeVSTInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned wb = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
Rn |= fieldFromInstruction_4(Insn, 4, 2) << 4;
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
// Writeback Operand
switch (MCInst_getOpcode(Inst)) {
case ARM_VST1d8wb_fixed:
case ARM_VST1d16wb_fixed:
case ARM_VST1d32wb_fixed:
case ARM_VST1d64wb_fixed:
case ARM_VST1d8wb_register:
case ARM_VST1d16wb_register:
case ARM_VST1d32wb_register:
case ARM_VST1d64wb_register:
case ARM_VST1q8wb_fixed:
case ARM_VST1q16wb_fixed:
case ARM_VST1q32wb_fixed:
case ARM_VST1q64wb_fixed:
case ARM_VST1q8wb_register:
case ARM_VST1q16wb_register:
case ARM_VST1q32wb_register:
case ARM_VST1q64wb_register:
case ARM_VST1d8Twb_fixed:
case ARM_VST1d16Twb_fixed:
case ARM_VST1d32Twb_fixed:
case ARM_VST1d64Twb_fixed:
case ARM_VST1d8Twb_register:
case ARM_VST1d16Twb_register:
case ARM_VST1d32Twb_register:
case ARM_VST1d64Twb_register:
case ARM_VST1d8Qwb_fixed:
case ARM_VST1d16Qwb_fixed:
case ARM_VST1d32Qwb_fixed:
case ARM_VST1d64Qwb_fixed:
case ARM_VST1d8Qwb_register:
case ARM_VST1d16Qwb_register:
case ARM_VST1d32Qwb_register:
case ARM_VST1d64Qwb_register:
case ARM_VST2d8wb_fixed:
case ARM_VST2d16wb_fixed:
case ARM_VST2d32wb_fixed:
case ARM_VST2d8wb_register:
case ARM_VST2d16wb_register:
case ARM_VST2d32wb_register:
case ARM_VST2q8wb_fixed:
case ARM_VST2q16wb_fixed:
case ARM_VST2q32wb_fixed:
case ARM_VST2q8wb_register:
case ARM_VST2q16wb_register:
case ARM_VST2q32wb_register:
case ARM_VST2b8wb_fixed:
case ARM_VST2b16wb_fixed:
case ARM_VST2b32wb_fixed:
case ARM_VST2b8wb_register:
case ARM_VST2b16wb_register:
case ARM_VST2b32wb_register:
if (Rm == 0xF)
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (0));
break;
case ARM_VST3d8_UPD:
case ARM_VST3d16_UPD:
case ARM_VST3d32_UPD:
case ARM_VST3q8_UPD:
case ARM_VST3q16_UPD:
case ARM_VST3q32_UPD:
case ARM_VST4d8_UPD:
case ARM_VST4d16_UPD:
case ARM_VST4d32_UPD:
case ARM_VST4q8_UPD:
case ARM_VST4q16_UPD:
case ARM_VST4q32_UPD:
if (!Check(&S,
DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
// AddrMode6 Base (register+alignment)
if (!Check(&S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
// AddrMode6 Offset (register)
switch (MCInst_getOpcode(Inst)) {
default:
if (Rm == 0xD)
MCOperand_CreateReg0(Inst, (0));
else if (Rm != 0xF) {
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address,
Decoder)))
return MCDisassembler_Fail;
}
break;
case ARM_VST1d8wb_fixed:
case ARM_VST1d16wb_fixed:
case ARM_VST1d32wb_fixed:
case ARM_VST1d64wb_fixed:
case ARM_VST1q8wb_fixed:
case ARM_VST1q16wb_fixed:
case ARM_VST1q32wb_fixed:
case ARM_VST1q64wb_fixed:
case ARM_VST1d8Twb_fixed:
case ARM_VST1d16Twb_fixed:
case ARM_VST1d32Twb_fixed:
case ARM_VST1d64Twb_fixed:
case ARM_VST1d8Qwb_fixed:
case ARM_VST1d16Qwb_fixed:
case ARM_VST1d32Qwb_fixed:
case ARM_VST1d64Qwb_fixed:
case ARM_VST2d8wb_fixed:
case ARM_VST2d16wb_fixed:
case ARM_VST2d32wb_fixed:
case ARM_VST2q8wb_fixed:
case ARM_VST2q16wb_fixed:
case ARM_VST2q32wb_fixed:
case ARM_VST2b8wb_fixed:
case ARM_VST2b16wb_fixed:
case ARM_VST2b32wb_fixed:
break;
}
// First input register
switch (MCInst_getOpcode(Inst)) {
case ARM_VST1q16:
case ARM_VST1q32:
case ARM_VST1q64:
case ARM_VST1q8:
case ARM_VST1q16wb_fixed:
case ARM_VST1q16wb_register:
case ARM_VST1q32wb_fixed:
case ARM_VST1q32wb_register:
case ARM_VST1q64wb_fixed:
case ARM_VST1q64wb_register:
case ARM_VST1q8wb_fixed:
case ARM_VST1q8wb_register:
case ARM_VST2d16:
case ARM_VST2d32:
case ARM_VST2d8:
case ARM_VST2d16wb_fixed:
case ARM_VST2d16wb_register:
case ARM_VST2d32wb_fixed:
case ARM_VST2d32wb_register:
case ARM_VST2d8wb_fixed:
case ARM_VST2d8wb_register:
if (!Check(&S, DecodeDPairRegisterClass(Inst, Rd, Address,
Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VST2b16:
case ARM_VST2b32:
case ARM_VST2b8:
case ARM_VST2b16wb_fixed:
case ARM_VST2b16wb_register:
case ARM_VST2b32wb_fixed:
case ARM_VST2b32wb_register:
case ARM_VST2b8wb_fixed:
case ARM_VST2b8wb_register:
if (!Check(&S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address,
Decoder)))
return MCDisassembler_Fail;
break;
default:
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
}
// Second input register
switch (MCInst_getOpcode(Inst)) {
case ARM_VST3d8:
case ARM_VST3d16:
case ARM_VST3d32:
case ARM_VST3d8_UPD:
case ARM_VST3d16_UPD:
case ARM_VST3d32_UPD:
case ARM_VST4d8:
case ARM_VST4d16:
case ARM_VST4d32:
case ARM_VST4d8_UPD:
case ARM_VST4d16_UPD:
case ARM_VST4d32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 1) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VST3q8:
case ARM_VST3q16:
case ARM_VST3q32:
case ARM_VST3q8_UPD:
case ARM_VST3q16_UPD:
case ARM_VST3q32_UPD:
case ARM_VST4q8:
case ARM_VST4q16:
case ARM_VST4q32:
case ARM_VST4q8_UPD:
case ARM_VST4q16_UPD:
case ARM_VST4q32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 2) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
// Third input register
switch (MCInst_getOpcode(Inst)) {
case ARM_VST3d8:
case ARM_VST3d16:
case ARM_VST3d32:
case ARM_VST3d8_UPD:
case ARM_VST3d16_UPD:
case ARM_VST3d32_UPD:
case ARM_VST4d8:
case ARM_VST4d16:
case ARM_VST4d32:
case ARM_VST4d8_UPD:
case ARM_VST4d16_UPD:
case ARM_VST4d32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 2) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VST3q8:
case ARM_VST3q16:
case ARM_VST3q32:
case ARM_VST3q8_UPD:
case ARM_VST3q16_UPD:
case ARM_VST3q32_UPD:
case ARM_VST4q8:
case ARM_VST4q16:
case ARM_VST4q32:
case ARM_VST4q8_UPD:
case ARM_VST4q16_UPD:
case ARM_VST4q32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 4) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
// Fourth input register
switch (MCInst_getOpcode(Inst)) {
case ARM_VST4d8:
case ARM_VST4d16:
case ARM_VST4d32:
case ARM_VST4d8_UPD:
case ARM_VST4d16_UPD:
case ARM_VST4d32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 3) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VST4q8:
case ARM_VST4q16:
case ARM_VST4q32:
case ARM_VST4q8_UPD:
case ARM_VST4q16_UPD:
case ARM_VST4q32_UPD:
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 6) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
return S;
}
static DecodeStatus DecodeVLD1DupInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned align = fieldFromInstruction_4(Insn, 4, 1);
unsigned size = fieldFromInstruction_4(Insn, 6, 2);
if (size == 0 && align == 1)
return MCDisassembler_Fail;
align *= (1 << size);
switch (MCInst_getOpcode(Inst)) {
case ARM_VLD1DUPq16:
case ARM_VLD1DUPq32:
case ARM_VLD1DUPq8:
case ARM_VLD1DUPq16wb_fixed:
case ARM_VLD1DUPq16wb_register:
case ARM_VLD1DUPq32wb_fixed:
case ARM_VLD1DUPq32wb_register:
case ARM_VLD1DUPq8wb_fixed:
case ARM_VLD1DUPq8wb_register:
if (!Check(&S, DecodeDPairRegisterClass(Inst, Rd, Address,
Decoder)))
return MCDisassembler_Fail;
break;
default:
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
break;
}
if (Rm != 0xF) {
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
// The fixed offset post-increment encodes Rm == 0xd. The no-writeback
// variant encodes Rm == 0xf. Anything else is a register offset post-
// increment and we need to add the register operand to the instruction.
if (Rm != 0xD && Rm != 0xF &&
!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeVLD2DupInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned align = fieldFromInstruction_4(Insn, 4, 1);
unsigned size = 1 << fieldFromInstruction_4(Insn, 6, 2);
align *= 2 * size;
switch (MCInst_getOpcode(Inst)) {
case ARM_VLD2DUPd16:
case ARM_VLD2DUPd32:
case ARM_VLD2DUPd8:
case ARM_VLD2DUPd16wb_fixed:
case ARM_VLD2DUPd16wb_register:
case ARM_VLD2DUPd32wb_fixed:
case ARM_VLD2DUPd32wb_register:
case ARM_VLD2DUPd8wb_fixed:
case ARM_VLD2DUPd8wb_register:
if (!Check(&S, DecodeDPairRegisterClass(Inst, Rd, Address,
Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VLD2DUPd16x2:
case ARM_VLD2DUPd32x2:
case ARM_VLD2DUPd8x2:
case ARM_VLD2DUPd16x2wb_fixed:
case ARM_VLD2DUPd16x2wb_register:
case ARM_VLD2DUPd32x2wb_fixed:
case ARM_VLD2DUPd32x2wb_register:
case ARM_VLD2DUPd8x2wb_fixed:
case ARM_VLD2DUPd8x2wb_register:
if (!Check(&S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address,
Decoder)))
return MCDisassembler_Fail;
break;
default:
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
break;
}
if (Rm != 0xF)
MCOperand_CreateImm0(Inst, (0));
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
if (Rm != 0xD && Rm != 0xF) {
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
}
return S;
}
static DecodeStatus DecodeVLD3DupInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned inc = fieldFromInstruction_4(Insn, 5, 1) + 1;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + inc) % 32, Address,
Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 2 * inc) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
if (Rm != 0xF) {
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (0));
if (Rm == 0xD)
MCOperand_CreateReg0(Inst, (0));
else if (Rm != 0xF) {
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
}
return S;
}
static DecodeStatus DecodeVLD4DupInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned size = fieldFromInstruction_4(Insn, 6, 2);
unsigned inc = fieldFromInstruction_4(Insn, 5, 1) + 1;
unsigned align = fieldFromInstruction_4(Insn, 4, 1);
if (size == 0x3) {
if (align == 0)
return MCDisassembler_Fail;
align = 16;
} else {
if (size == 2) {
align *= 8;
} else {
size = 1 << size;
align *= 4 * size;
}
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + inc) % 32, Address,
Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 2 * inc) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd + 3 * inc) % 32,
Address, Decoder)))
return MCDisassembler_Fail;
if (Rm != 0xF) {
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
if (Rm == 0xD)
MCOperand_CreateReg0(Inst, (0));
else if (Rm != 0xF) {
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
}
return S;
}
static DecodeStatus DecodeVMOVModImmInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned imm = fieldFromInstruction_4(Insn, 0, 4);
imm |= fieldFromInstruction_4(Insn, 16, 3) << 4;
imm |= fieldFromInstruction_4(Insn, 24, 1) << 7;
imm |= fieldFromInstruction_4(Insn, 8, 4) << 8;
imm |= fieldFromInstruction_4(Insn, 5, 1) << 12;
unsigned Q = fieldFromInstruction_4(Insn, 6, 1);
if (Q) {
if (!Check(&S,
DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
} else {
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
}
MCOperand_CreateImm0(Inst, (imm));
switch (MCInst_getOpcode(Inst)) {
case ARM_VORRiv4i16:
case ARM_VORRiv2i32:
case ARM_VBICiv4i16:
case ARM_VBICiv2i32:
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
break;
case ARM_VORRiv8i16:
case ARM_VORRiv4i32:
case ARM_VBICiv8i16:
case ARM_VBICiv4i32:
if (!Check(&S,
DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
break;
default:
break;
}
return S;
}
static DecodeStatus DecodeMVEModImmInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Qd = ((fieldFromInstruction_4(Insn, 22, 1) << 3) |
fieldFromInstruction_4(Insn, 13, 3));
unsigned cmode = fieldFromInstruction_4(Insn, 8, 4);
unsigned imm = fieldFromInstruction_4(Insn, 0, 4);
imm |= fieldFromInstruction_4(Insn, 16, 3) << 4;
imm |= fieldFromInstruction_4(Insn, 28, 1) << 7;
imm |= cmode << 8;
imm |= fieldFromInstruction_4(Insn, 5, 1) << 12;
if (cmode == 0xF && MCInst_getOpcode(Inst) == ARM_MVE_VMVNimmi32)
return MCDisassembler_Fail;
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (imm));
MCOperand_CreateImm0(Inst, (ARMVCC_None));
MCOperand_CreateReg0(Inst, (0));
MCOperand_CreateImm0(Inst, (0));
return S;
}
static DecodeStatus DecodeMVEVADCInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Qd = fieldFromInstruction_4(Insn, 13, 3);
Qd |= fieldFromInstruction_4(Insn, 22, 1) << 3;
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateReg0(Inst, (ARM_FPSCR_NZCV));
unsigned Qn = fieldFromInstruction_4(Insn, 17, 3);
Qn |= fieldFromInstruction_4(Insn, 7, 1) << 3;
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qn, Address, Decoder)))
return MCDisassembler_Fail;
unsigned Qm = fieldFromInstruction_4(Insn, 1, 3);
Qm |= fieldFromInstruction_4(Insn, 5, 1) << 3;
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qm, Address, Decoder)))
return MCDisassembler_Fail;
if (!fieldFromInstruction_4(Insn, 12,
1)) // I bit clear => need input FPSCR
MCOperand_CreateReg0(Inst, (ARM_FPSCR_NZCV));
MCOperand_CreateImm0(Inst, (Qd));
return S;
}
static DecodeStatus DecodeVSHLMaxInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
Rm |= fieldFromInstruction_4(Insn, 5, 1) << 4;
unsigned size = fieldFromInstruction_4(Insn, 18, 2);
if (!Check(&S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (8 << size));
return S;
}
static DecodeStatus DecodeShiftRight8Imm(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
MCOperand_CreateImm0(Inst, (8 - Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodeShiftRight16Imm(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
MCOperand_CreateImm0(Inst, (16 - Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodeShiftRight32Imm(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
MCOperand_CreateImm0(Inst, (32 - Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodeShiftRight64Imm(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
MCOperand_CreateImm0(Inst, (64 - Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodeTBLInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
Rn |= fieldFromInstruction_4(Insn, 7, 1) << 4;
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
Rm |= fieldFromInstruction_4(Insn, 5, 1) << 4;
unsigned op = fieldFromInstruction_4(Insn, 6, 1);
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (op) {
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail; // Writeback
}
switch (MCInst_getOpcode(Inst)) {
case ARM_VTBL2:
case ARM_VTBX2:
if (!Check(&S, DecodeDPairRegisterClass(Inst, Rn, Address,
Decoder)))
return MCDisassembler_Fail;
break;
default:
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeThumbAddSpecialReg(MCInst *Inst, uint16_t Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned dst = fieldFromInstruction_2(Insn, 8, 3);
unsigned imm = fieldFromInstruction_2(Insn, 0, 8);
if (!Check(&S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
return MCDisassembler_Fail;
switch (MCInst_getOpcode(Inst)) {
default:
return MCDisassembler_Fail;
case ARM_tADR:
break; // tADR does not explicitly represent the PC as an operand.
case ARM_tADDrSPi:
MCOperand_CreateReg0(Inst, (ARM_SP));
break;
}
MCOperand_CreateImm0(Inst, (imm));
return S;
}
static DecodeStatus DecodeThumbBROperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
if (!tryAddingSymbolicOperand(
Address, Address + SignExtend32((Val << 1), 12) + 4, true,
2, Inst, Decoder))
MCOperand_CreateImm0(Inst, (SignExtend32((Val << 1), 12)));
return MCDisassembler_Success;
}
static DecodeStatus DecodeT2BROperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
if (!tryAddingSymbolicOperand(Address,
Address + SignExtend32((Val), 21) + 4,
true, 4, Inst, Decoder))
MCOperand_CreateImm0(Inst, (SignExtend32((Val), 21)));
return MCDisassembler_Success;
}
static DecodeStatus DecodeThumbCmpBROperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
if (!tryAddingSymbolicOperand(Address, Address + (Val << 1) + 4, true,
2, Inst, Decoder))
MCOperand_CreateImm0(Inst, (Val << 1));
return MCDisassembler_Success;
}
static DecodeStatus DecodeThumbAddrModeRR(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 0, 3);
unsigned Rm = fieldFromInstruction_4(Val, 3, 3);
if (!Check(&S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeThumbAddrModeIS(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 0, 3);
unsigned imm = fieldFromInstruction_4(Val, 3, 5);
if (!Check(&S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (imm));
return S;
}
static DecodeStatus DecodeThumbAddrModePC(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
unsigned imm = Val << 2;
MCOperand_CreateImm0(Inst, (imm));
tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4,
Decoder);
return MCDisassembler_Success;
}
static DecodeStatus DecodeThumbAddrModeSP(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
MCOperand_CreateReg0(Inst, (ARM_SP));
MCOperand_CreateImm0(Inst, (Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodeT2AddrModeSOReg(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 6, 4);
unsigned Rm = fieldFromInstruction_4(Val, 2, 4);
unsigned imm = fieldFromInstruction_4(Val, 0, 2);
// Thumb stores cannot use PC as dest register.
switch (MCInst_getOpcode(Inst)) {
case ARM_t2STRHs:
case ARM_t2STRBs:
case ARM_t2STRs:
if (Rn == 15)
return MCDisassembler_Fail;
break;
default:
break;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (imm));
return S;
}
static DecodeStatus DecodeT2LoadShift(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
bool hasMP = ARM_getFeatureBits(Inst->csh->mode, ARM_FeatureMP);
bool hasV7Ops = ARM_getFeatureBits(Inst->csh->mode, ARM_HasV7Ops);
if (Rn == 15) {
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDRBs:
MCInst_setOpcode(Inst, (ARM_t2LDRBpci));
break;
case ARM_t2LDRHs:
MCInst_setOpcode(Inst, (ARM_t2LDRHpci));
break;
case ARM_t2LDRSHs:
MCInst_setOpcode(Inst, (ARM_t2LDRSHpci));
break;
case ARM_t2LDRSBs:
MCInst_setOpcode(Inst, (ARM_t2LDRSBpci));
break;
case ARM_t2LDRs:
MCInst_setOpcode(Inst, (ARM_t2LDRpci));
break;
case ARM_t2PLDs:
MCInst_setOpcode(Inst, (ARM_t2PLDpci));
break;
case ARM_t2PLIs:
MCInst_setOpcode(Inst, (ARM_t2PLIpci));
break;
default:
return MCDisassembler_Fail;
}
return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
}
if (Rt == 15) {
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDRSHs:
return MCDisassembler_Fail;
case ARM_t2LDRHs:
MCInst_setOpcode(Inst, (ARM_t2PLDWs));
break;
case ARM_t2LDRSBs:
MCInst_setOpcode(Inst, (ARM_t2PLIs));
break;
default:
break;
}
}
switch (MCInst_getOpcode(Inst)) {
case ARM_t2PLDs:
break;
case ARM_t2PLIs:
if (!hasV7Ops)
return MCDisassembler_Fail;
break;
case ARM_t2PLDWs:
if (!hasV7Ops || !hasMP)
return MCDisassembler_Fail;
break;
default:
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
}
unsigned addrmode = fieldFromInstruction_4(Insn, 4, 2);
addrmode |= fieldFromInstruction_4(Insn, 0, 4) << 2;
addrmode |= fieldFromInstruction_4(Insn, 16, 4) << 6;
if (!Check(&S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeT2LoadImm8(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned U = fieldFromInstruction_4(Insn, 9, 1);
unsigned imm = fieldFromInstruction_4(Insn, 0, 8);
imm |= (U << 8);
imm |= (Rn << 9);
unsigned add = fieldFromInstruction_4(Insn, 9, 1);
bool hasMP = ARM_getFeatureBits(Inst->csh->mode, ARM_FeatureMP);
bool hasV7Ops = ARM_getFeatureBits(Inst->csh->mode, ARM_HasV7Ops);
if (Rn == 15) {
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDRi8:
MCInst_setOpcode(Inst, (ARM_t2LDRpci));
break;
case ARM_t2LDRBi8:
MCInst_setOpcode(Inst, (ARM_t2LDRBpci));
break;
case ARM_t2LDRSBi8:
MCInst_setOpcode(Inst, (ARM_t2LDRSBpci));
break;
case ARM_t2LDRHi8:
MCInst_setOpcode(Inst, (ARM_t2LDRHpci));
break;
case ARM_t2LDRSHi8:
MCInst_setOpcode(Inst, (ARM_t2LDRSHpci));
break;
case ARM_t2PLDi8:
MCInst_setOpcode(Inst, (ARM_t2PLDpci));
break;
case ARM_t2PLIi8:
MCInst_setOpcode(Inst, (ARM_t2PLIpci));
break;
default:
return MCDisassembler_Fail;
}
return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
}
if (Rt == 15) {
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDRSHi8:
return MCDisassembler_Fail;
case ARM_t2LDRHi8:
if (!add)
MCInst_setOpcode(Inst, (ARM_t2PLDWi8));
break;
case ARM_t2LDRSBi8:
MCInst_setOpcode(Inst, (ARM_t2PLIi8));
break;
default:
break;
}
}
switch (MCInst_getOpcode(Inst)) {
case ARM_t2PLDi8:
break;
case ARM_t2PLIi8:
if (!hasV7Ops)
return MCDisassembler_Fail;
break;
case ARM_t2PLDWi8:
if (!hasV7Ops || !hasMP)
return MCDisassembler_Fail;
break;
default:
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeT2LoadImm12(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
imm |= (Rn << 13);
bool hasMP = ARM_getFeatureBits(Inst->csh->mode, ARM_FeatureMP);
bool hasV7Ops = ARM_getFeatureBits(Inst->csh->mode, ARM_HasV7Ops);
if (Rn == 15) {
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDRi12:
MCInst_setOpcode(Inst, (ARM_t2LDRpci));
break;
case ARM_t2LDRHi12:
MCInst_setOpcode(Inst, (ARM_t2LDRHpci));
break;
case ARM_t2LDRSHi12:
MCInst_setOpcode(Inst, (ARM_t2LDRSHpci));
break;
case ARM_t2LDRBi12:
MCInst_setOpcode(Inst, (ARM_t2LDRBpci));
break;
case ARM_t2LDRSBi12:
MCInst_setOpcode(Inst, (ARM_t2LDRSBpci));
break;
case ARM_t2PLDi12:
MCInst_setOpcode(Inst, (ARM_t2PLDpci));
break;
case ARM_t2PLIi12:
MCInst_setOpcode(Inst, (ARM_t2PLIpci));
break;
default:
return MCDisassembler_Fail;
}
return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
}
if (Rt == 15) {
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDRSHi12:
return MCDisassembler_Fail;
case ARM_t2LDRHi12:
MCInst_setOpcode(Inst, (ARM_t2PLDWi12));
break;
case ARM_t2LDRSBi12:
MCInst_setOpcode(Inst, (ARM_t2PLIi12));
break;
default:
break;
}
}
switch (MCInst_getOpcode(Inst)) {
case ARM_t2PLDi12:
break;
case ARM_t2PLIi12:
if (!hasV7Ops)
return MCDisassembler_Fail;
break;
case ARM_t2PLDWi12:
if (!hasV7Ops || !hasMP)
return MCDisassembler_Fail;
break;
default:
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeT2AddrModeImm12(Inst, imm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeT2LoadT(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned imm = fieldFromInstruction_4(Insn, 0, 8);
imm |= (Rn << 9);
if (Rn == 15) {
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDRT:
MCInst_setOpcode(Inst, (ARM_t2LDRpci));
break;
case ARM_t2LDRBT:
MCInst_setOpcode(Inst, (ARM_t2LDRBpci));
break;
case ARM_t2LDRHT:
MCInst_setOpcode(Inst, (ARM_t2LDRHpci));
break;
case ARM_t2LDRSBT:
MCInst_setOpcode(Inst, (ARM_t2LDRSBpci));
break;
case ARM_t2LDRSHT:
MCInst_setOpcode(Inst, (ARM_t2LDRSHpci));
break;
default:
return MCDisassembler_Fail;
}
return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
}
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeT2LoadLabel(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned U = fieldFromInstruction_4(Insn, 23, 1);
int imm = fieldFromInstruction_4(Insn, 0, 12);
bool hasV7Ops = ARM_getFeatureBits(Inst->csh->mode, ARM_HasV7Ops);
if (Rt == 15) {
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDRBpci:
case ARM_t2LDRHpci:
MCInst_setOpcode(Inst, (ARM_t2PLDpci));
break;
case ARM_t2LDRSBpci:
MCInst_setOpcode(Inst, (ARM_t2PLIpci));
break;
case ARM_t2LDRSHpci:
return MCDisassembler_Fail;
default:
break;
}
}
switch (MCInst_getOpcode(Inst)) {
case ARM_t2PLDpci:
break;
case ARM_t2PLIpci:
if (!hasV7Ops)
return MCDisassembler_Fail;
break;
default:
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!U) {
// Special case for #-0.
if (imm == 0)
imm = INT32_MIN;
else
imm = -imm;
}
MCOperand_CreateImm0(Inst, (imm));
return S;
}
static DecodeStatus DecodeT2Imm8S4(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder)
{
if (Val == 0)
MCOperand_CreateImm0(Inst, (INT32_MIN));
else {
int imm = Val & 0xFF;
if (!(Val & 0x100))
imm *= -1;
MCOperand_CreateImm0(Inst, (imm * 4));
}
return MCDisassembler_Success;
}
static DecodeStatus DecodeT2Imm7S4(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder)
{
if (Val == 0)
MCOperand_CreateImm0(Inst, (INT32_MIN));
else {
int imm = Val & 0x7F;
if (!(Val & 0x80))
imm *= -1;
MCOperand_CreateImm0(Inst, (imm * 4));
}
return MCDisassembler_Success;
}
static DecodeStatus DecodeT2AddrModeImm8s4(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 9, 4);
unsigned imm = fieldFromInstruction_4(Val, 0, 9);
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeT2AddrModeImm7s4(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 8, 4);
unsigned imm = fieldFromInstruction_4(Val, 0, 8);
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeT2Imm7S4(Inst, imm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 8, 4);
unsigned imm = fieldFromInstruction_4(Val, 0, 8);
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (imm));
return S;
}
static DecodeStatus DecodeT2Imm8(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder)
{
int imm = Val & 0xFF;
if (Val == 0)
imm = INT32_MIN;
else if (!(Val & 0x100))
imm *= -1;
MCOperand_CreateImm0(Inst, (imm));
return MCDisassembler_Success;
}
#define DEFINE_DecodeT2Imm7(shift) \
static DecodeStatus CONCAT(DecodeT2Imm7, shift)(MCInst * Inst, \
unsigned Val, \
uint64_t Address, \
const void *Decoder) \
{ \
int imm = Val & 0x7F; \
if (Val == 0) \
imm = INT32_MIN; \
else if (!(Val & 0x80)) \
imm *= -1; \
if (imm != INT32_MIN) \
imm *= (1U << shift); \
MCOperand_CreateImm0(Inst, (imm)); \
\
return MCDisassembler_Success; \
}
DEFINE_DecodeT2Imm7(0) DEFINE_DecodeT2Imm7(1) DEFINE_DecodeT2Imm7(2)
static DecodeStatus
DecodeT2AddrModeImm8(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 9, 4);
unsigned imm = fieldFromInstruction_4(Val, 0, 9);
// Thumb stores cannot use PC as dest register.
switch (MCInst_getOpcode(Inst)) {
case ARM_t2STRT:
case ARM_t2STRBT:
case ARM_t2STRHT:
case ARM_t2STRi8:
case ARM_t2STRHi8:
case ARM_t2STRBi8:
if (Rn == 15)
return MCDisassembler_Fail;
break;
default:
break;
}
// Some instructions always use an additive offset.
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDRT:
case ARM_t2LDRBT:
case ARM_t2LDRHT:
case ARM_t2LDRSBT:
case ARM_t2LDRSHT:
case ARM_t2STRT:
case ARM_t2STRBT:
case ARM_t2STRHT:
imm |= 0x100;
break;
default:
break;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
#define DEFINE_DecodeTAddrModeImm7(shift) \
static DecodeStatus CONCAT(DecodeTAddrModeImm7, shift)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder) \
{ \
DecodeStatus S = MCDisassembler_Success; \
\
unsigned Rn = fieldFromInstruction_4(Val, 8, 3); \
unsigned imm = fieldFromInstruction_4(Val, 0, 8); \
\
if (!Check(&S, DecodetGPRRegisterClass(Inst, Rn, Address, \
Decoder))) \
return MCDisassembler_Fail; \
if (!Check(&S, CONCAT(DecodeT2Imm7, shift)(Inst, imm, Address, \
Decoder))) \
return MCDisassembler_Fail; \
\
return S; \
}
DEFINE_DecodeTAddrModeImm7(0) DEFINE_DecodeTAddrModeImm7(1)
#define DEFINE_DecodeT2AddrModeImm7(shift, WriteBack) \
static DecodeStatus CONCAT(DecodeT2AddrModeImm7, \
CONCAT(shift, WriteBack))( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder) \
{ \
DecodeStatus S = MCDisassembler_Success; \
\
unsigned Rn = fieldFromInstruction_4(Val, 8, 4); \
unsigned imm = fieldFromInstruction_4(Val, 0, 8); \
if (WriteBack) { \
if (!Check(&S, DecoderGPRRegisterClass( \
Inst, Rn, Address, Decoder))) \
return MCDisassembler_Fail; \
} else if (!Check(&S, DecodeGPRnopcRegisterClass( \
Inst, Rn, Address, Decoder))) \
return MCDisassembler_Fail; \
if (!Check(&S, CONCAT(DecodeT2Imm7, shift)(Inst, imm, Address, \
Decoder))) \
return MCDisassembler_Fail; \
\
return S; \
}
DEFINE_DecodeT2AddrModeImm7(0, 0) DEFINE_DecodeT2AddrModeImm7(1, 0)
DEFINE_DecodeT2AddrModeImm7(2, 0)
DEFINE_DecodeT2AddrModeImm7(0, 1)
DEFINE_DecodeT2AddrModeImm7(1, 1)
DEFINE_DecodeT2AddrModeImm7(2, 1)
static DecodeStatus
DecodeT2LdStPre(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned addr = fieldFromInstruction_4(Insn, 0, 8);
addr |= fieldFromInstruction_4(Insn, 9, 1) << 8;
addr |= Rn << 9;
unsigned load = fieldFromInstruction_4(Insn, 20, 1);
if (Rn == 15) {
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LDR_PRE:
case ARM_t2LDR_POST:
MCInst_setOpcode(Inst, (ARM_t2LDRpci));
break;
case ARM_t2LDRB_PRE:
case ARM_t2LDRB_POST:
MCInst_setOpcode(Inst, (ARM_t2LDRBpci));
break;
case ARM_t2LDRH_PRE:
case ARM_t2LDRH_POST:
MCInst_setOpcode(Inst, (ARM_t2LDRHpci));
break;
case ARM_t2LDRSB_PRE:
case ARM_t2LDRSB_POST:
if (Rt == 15)
MCInst_setOpcode(Inst, (ARM_t2PLIpci));
else
MCInst_setOpcode(Inst, (ARM_t2LDRSBpci));
break;
case ARM_t2LDRSH_PRE:
case ARM_t2LDRSH_POST:
MCInst_setOpcode(Inst, (ARM_t2LDRSHpci));
break;
default:
return MCDisassembler_Fail;
}
return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
}
if (!load) {
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (load) {
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeT2AddrModeImm12(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 13, 4);
unsigned imm = fieldFromInstruction_4(Val, 0, 12);
// Thumb stores cannot use PC as dest register.
switch (MCInst_getOpcode(Inst)) {
case ARM_t2STRi12:
case ARM_t2STRBi12:
case ARM_t2STRHi12:
if (Rn == 15)
return MCDisassembler_Fail;
break;
default:
break;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (imm));
return S;
}
static DecodeStatus DecodeThumbAddSPImm(MCInst *Inst, uint16_t Insn,
uint64_t Address, const void *Decoder)
{
unsigned imm = fieldFromInstruction_2(Insn, 0, 7);
MCOperand_CreateReg0(Inst, (ARM_SP));
MCOperand_CreateReg0(Inst, (ARM_SP));
MCOperand_CreateImm0(Inst, (imm));
return MCDisassembler_Success;
}
static DecodeStatus DecodeThumbAddSPReg(MCInst *Inst, uint16_t Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if (MCInst_getOpcode(Inst) == ARM_tADDrSP) {
unsigned Rdm = fieldFromInstruction_2(Insn, 0, 3);
Rdm |= fieldFromInstruction_2(Insn, 7, 1) << 3;
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateReg0(Inst, (ARM_SP));
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
return MCDisassembler_Fail;
} else if (MCInst_getOpcode(Inst) == ARM_tADDspr) {
unsigned Rm = fieldFromInstruction_2(Insn, 3, 4);
MCOperand_CreateReg0(Inst, (ARM_SP));
MCOperand_CreateReg0(Inst, (ARM_SP));
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
}
return S;
}
static DecodeStatus DecodeThumbCPS(MCInst *Inst, uint16_t Insn,
uint64_t Address, const void *Decoder)
{
unsigned imod = fieldFromInstruction_2(Insn, 4, 1) | 0x2;
unsigned flags = fieldFromInstruction_2(Insn, 0, 3);
MCOperand_CreateImm0(Inst, (imod));
MCOperand_CreateImm0(Inst, (flags));
return MCDisassembler_Success;
}
static DecodeStatus DecodePostIdxReg(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned add = fieldFromInstruction_4(Insn, 4, 1);
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (add));
return S;
}
static DecodeStatus DecodeMveAddrModeRQ(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 3, 4);
unsigned Qm = fieldFromInstruction_4(Insn, 0, 3);
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
#define DEFINE_DecodeMveAddrModeQ(shift) \
static DecodeStatus CONCAT(DecodeMveAddrModeQ, shift)( \
MCInst * Inst, unsigned Insn, uint64_t Address, \
const void *Decoder) \
{ \
DecodeStatus S = MCDisassembler_Success; \
unsigned Qm = fieldFromInstruction_4(Insn, 8, 3); \
int imm = fieldFromInstruction_4(Insn, 0, 7); \
\
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qm, Address, \
Decoder))) \
return MCDisassembler_Fail; \
\
if (!fieldFromInstruction_4(Insn, 7, 1)) { \
if (imm == 0) \
imm = INT32_MIN; \
else \
imm *= -1; \
} \
if (imm != INT32_MIN) \
imm *= (1U << shift); \
MCOperand_CreateImm0(Inst, (imm)); \
\
return S; \
}
DEFINE_DecodeMveAddrModeQ(2) DEFINE_DecodeMveAddrModeQ(3)
static DecodeStatus
DecodeThumbBLXOffset(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder)
{
// Val is passed in as S:J1:J2:imm10H:imm10L:'0'
// Note only one trailing zero not two. Also the J1 and J2 values are from
// the encoded instruction. So here change to I1 and I2 values via:
// I1 = NOT(J1 EOR S);
// I2 = NOT(J2 EOR S);
// and build the imm32 with two trailing zeros as documented:
// imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
unsigned S = (Val >> 23) & 1;
unsigned J1 = (Val >> 22) & 1;
unsigned J2 = (Val >> 21) & 1;
unsigned I1 = !(J1 ^ S);
unsigned I2 = !(J2 ^ S);
unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
int imm32 = SignExtend32((tmp << 1), 25);
if (!tryAddingSymbolicOperand(Address, (Address & ~2u) + imm32 + 4,
true, 4, Inst, Decoder))
MCOperand_CreateImm0(Inst, (imm32));
return MCDisassembler_Success;
}
static DecodeStatus DecodeCoprocessor(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
if (Val == 0xA || Val == 0xB)
return MCDisassembler_Fail;
if (!isValidCoprocessorNumber(Inst, Val))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodeThumbTableBranch(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
if (Rn == 13 && !ARM_getFeatureBits(Inst->csh->mode, ARM_HasV8Ops))
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeThumb2BCCInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned pred = fieldFromInstruction_4(Insn, 22, 4);
if (pred == 0xE || pred == 0xF) {
unsigned opc = fieldFromInstruction_4(Insn, 4, 28);
switch (opc) {
default:
return MCDisassembler_Fail;
case 0xf3bf8f4:
MCInst_setOpcode(Inst, (ARM_t2DSB));
break;
case 0xf3bf8f5:
MCInst_setOpcode(Inst, (ARM_t2DMB));
break;
case 0xf3bf8f6:
MCInst_setOpcode(Inst, (ARM_t2ISB));
break;
}
unsigned imm = fieldFromInstruction_4(Insn, 0, 4);
return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
}
unsigned brtarget = fieldFromInstruction_4(Insn, 0, 11) << 1;
brtarget |= fieldFromInstruction_4(Insn, 11, 1) << 19;
brtarget |= fieldFromInstruction_4(Insn, 13, 1) << 18;
brtarget |= fieldFromInstruction_4(Insn, 16, 6) << 12;
brtarget |= fieldFromInstruction_4(Insn, 26, 1) << 20;
if (!Check(&S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
// Decode a shifted immediate operand. These basically consist
// of an 8-bit value, and a 4-bit directive that specifies either
// a splat operation or a rotation.
static DecodeStatus DecodeT2SOImm(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder)
{
unsigned ctrl = fieldFromInstruction_4(Val, 10, 2);
if (ctrl == 0) {
unsigned byte = fieldFromInstruction_4(Val, 8, 2);
unsigned imm = fieldFromInstruction_4(Val, 0, 8);
switch (byte) {
case 0:
MCOperand_CreateImm0(Inst, (imm));
break;
case 1:
MCOperand_CreateImm0(Inst, ((imm << 16) | imm));
break;
case 2:
MCOperand_CreateImm0(Inst, ((imm << 24) | (imm << 8)));
break;
case 3:
MCOperand_CreateImm0(Inst, ((imm << 24) | (imm << 16) |
(imm << 8) | imm));
break;
}
} else {
unsigned unrot = fieldFromInstruction_4(Val, 0, 7) | 0x80;
unsigned rot = fieldFromInstruction_4(Val, 7, 5);
unsigned imm = (unrot >> rot) | (unrot << ((32 - rot) & 31));
MCOperand_CreateImm0(Inst, (imm));
}
return MCDisassembler_Success;
}
static DecodeStatus DecodeThumbBCCTargetOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
if (!tryAddingSymbolicOperand(Address,
Address + SignExtend32((Val << 1), 9) + 4,
true, 2, Inst, Decoder))
MCOperand_CreateImm0(Inst, (SignExtend32((Val << 1), 9)));
return MCDisassembler_Success;
}
static DecodeStatus DecodeThumbBLTargetOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
// Val is passed in as S:J1:J2:imm10:imm11
// Note no trailing zero after imm11. Also the J1 and J2 values are from
// the encoded instruction. So here change to I1 and I2 values via:
// I1 = NOT(J1 EOR S);
// I2 = NOT(J2 EOR S);
// and build the imm32 with one trailing zero as documented:
// imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
unsigned S = (Val >> 23) & 1;
unsigned J1 = (Val >> 22) & 1;
unsigned J2 = (Val >> 21) & 1;
unsigned I1 = !(J1 ^ S);
unsigned I2 = !(J2 ^ S);
unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
int imm32 = SignExtend32((tmp << 1), 25);
if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4, true, 4,
Inst, Decoder))
MCOperand_CreateImm0(Inst, (imm32));
return MCDisassembler_Success;
}
static DecodeStatus DecodeMemBarrierOption(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
if (Val & ~0xf)
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodeInstSyncBarrierOption(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
if (Val & ~0xf)
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodeMSRMask(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if (ARM_getFeatureBits(Inst->csh->mode, ARM_FeatureMClass)) {
unsigned ValLow = Val & 0xff;
// Validate the SYSm value first.
switch (ValLow) {
case 0: // apsr
case 1: // iapsr
case 2: // eapsr
case 3: // xpsr
case 5: // ipsr
case 6: // epsr
case 7: // iepsr
case 8: // msp
case 9: // psp
case 16: // primask
case 20: // control
break;
case 17: // basepri
case 18: // basepri_max
case 19: // faultmask
if (!(ARM_getFeatureBits(Inst->csh->mode,
ARM_HasV7Ops)))
// Values basepri, basepri_max and faultmask are only valid for
// v7m.
return MCDisassembler_Fail;
break;
case 0x8a: // msplim_ns
case 0x8b: // psplim_ns
case 0x91: // basepri_ns
case 0x93: // faultmask_ns
if (!(ARM_getFeatureBits(Inst->csh->mode,
ARM_HasV8MMainlineOps)))
return MCDisassembler_Fail;
// fall through
case 10: // msplim
case 11: // psplim
case 0x88: // msp_ns
case 0x89: // psp_ns
case 0x90: // primask_ns
case 0x94: // control_ns
case 0x98: // sp_ns
if (!(ARM_getFeatureBits(Inst->csh->mode,
ARM_Feature8MSecExt)))
return MCDisassembler_Fail;
break;
case 0x20: // pac_key_p_0
case 0x21: // pac_key_p_1
case 0x22: // pac_key_p_2
case 0x23: // pac_key_p_3
case 0x24: // pac_key_u_0
case 0x25: // pac_key_u_1
case 0x26: // pac_key_u_2
case 0x27: // pac_key_u_3
case 0xa0: // pac_key_p_0_ns
case 0xa1: // pac_key_p_1_ns
case 0xa2: // pac_key_p_2_ns
case 0xa3: // pac_key_p_3_ns
case 0xa4: // pac_key_u_0_ns
case 0xa5: // pac_key_u_1_ns
case 0xa6: // pac_key_u_2_ns
case 0xa7: // pac_key_u_3_ns
if (!(ARM_getFeatureBits(Inst->csh->mode,
ARM_FeaturePACBTI)))
return MCDisassembler_Fail;
break;
default:
// Architecturally defined as unpredictable
S = MCDisassembler_SoftFail;
break;
}
if (MCInst_getOpcode(Inst) == ARM_t2MSR_M) {
unsigned Mask = fieldFromInstruction_4(Val, 10, 2);
if (!(ARM_getFeatureBits(Inst->csh->mode,
ARM_HasV7Ops))) {
// The ARMv6-M MSR bits {11-10} can be only 0b10, other values
// are unpredictable.
if (Mask != 2)
S = MCDisassembler_SoftFail;
} else {
// The ARMv7-M architecture stores an additional 2-bit mask
// value in MSR bits {11-10}. The mask is used only with apsr,
// iapsr, eapsr and xpsr, it has to be 0b10 in other cases. Bit
// mask{1} indicates if the NZCVQ bits should be moved by the
// instruction. Bit mask{0} indicates the move for the GE{3:0}
// bits, the mask{0} bit can be set only if the processor
// includes the DSP extension.
if (Mask == 0 || (Mask != 2 && ValLow > 3) ||
(!(ARM_getFeatureBits(Inst->csh->mode,
ARM_FeatureDSP)) &&
(Mask & 1)))
S = MCDisassembler_SoftFail;
}
}
} else {
// A/R class
if (Val == 0)
return MCDisassembler_Fail;
}
MCOperand_CreateImm0(Inst, (Val));
return S;
}
static DecodeStatus DecodeBankedReg(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
unsigned R = fieldFromInstruction_4(Val, 5, 1);
unsigned SysM = fieldFromInstruction_4(Val, 0, 5);
// The table of encodings for these banked registers comes from B9.2.3 of
// the ARM ARM. There are patterns, but nothing regular enough to make this
// logic neater. So by fiat, these values are UNPREDICTABLE:
if (!ARMBankedReg_lookupBankedRegByEncoding((R << 5) | SysM))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodeDoubleRegLoad(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
if (Rn == 0xF)
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeDoubleRegStore(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rt = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt + 1)
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeLDRPreImm(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
imm |= fieldFromInstruction_4(Insn, 16, 4) << 13;
imm |= fieldFromInstruction_4(Insn, 23, 1) << 12;
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
if (Rn == 0xF || Rn == Rt)
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeLDRPreReg(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
imm |= fieldFromInstruction_4(Insn, 16, 4) << 13;
imm |= fieldFromInstruction_4(Insn, 23, 1) << 12;
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
if (Rn == 0xF || Rn == Rt)
S = MCDisassembler_SoftFail;
if (Rm == 0xF)
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeSTRPreImm(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
imm |= fieldFromInstruction_4(Insn, 16, 4) << 13;
imm |= fieldFromInstruction_4(Insn, 23, 1) << 12;
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
if (Rn == 0xF || Rn == Rt)
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeSTRPreReg(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
imm |= fieldFromInstruction_4(Insn, 16, 4) << 13;
imm |= fieldFromInstruction_4(Insn, 23, 1) << 12;
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
if (Rn == 0xF || Rn == Rt)
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeVLD1LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
switch (size) {
default:
return MCDisassembler_Fail;
case 0:
if (fieldFromInstruction_4(Insn, 4, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 5, 3);
break;
case 1:
if (fieldFromInstruction_4(Insn, 5, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 6, 2);
if (fieldFromInstruction_4(Insn, 4, 1))
align = 2;
break;
case 2:
if (fieldFromInstruction_4(Insn, 6, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 7, 1);
switch (fieldFromInstruction_4(Insn, 4, 2)) {
case 0:
align = 0;
break;
case 3:
align = 4;
break;
default:
return MCDisassembler_Fail;
}
break;
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (Rm != 0xF) { // Writeback
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
if (Rm != 0xF) {
if (Rm != 0xD) {
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address,
Decoder)))
return MCDisassembler_Fail;
} else
MCOperand_CreateReg0(Inst, (0));
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (index));
return S;
}
static DecodeStatus DecodeVST1LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
switch (size) {
default:
return MCDisassembler_Fail;
case 0:
if (fieldFromInstruction_4(Insn, 4, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 5, 3);
break;
case 1:
if (fieldFromInstruction_4(Insn, 5, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 6, 2);
if (fieldFromInstruction_4(Insn, 4, 1))
align = 2;
break;
case 2:
if (fieldFromInstruction_4(Insn, 6, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 7, 1);
switch (fieldFromInstruction_4(Insn, 4, 2)) {
case 0:
align = 0;
break;
case 3:
align = 4;
break;
default:
return MCDisassembler_Fail;
}
break;
}
if (Rm != 0xF) { // Writeback
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
if (Rm != 0xF) {
if (Rm != 0xD) {
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address,
Decoder)))
return MCDisassembler_Fail;
} else
MCOperand_CreateReg0(Inst, (0));
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (index));
return S;
}
static DecodeStatus DecodeVLD2LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
unsigned inc = 1;
switch (size) {
default:
return MCDisassembler_Fail;
case 0:
index = fieldFromInstruction_4(Insn, 5, 3);
if (fieldFromInstruction_4(Insn, 4, 1))
align = 2;
break;
case 1:
index = fieldFromInstruction_4(Insn, 6, 2);
if (fieldFromInstruction_4(Insn, 4, 1))
align = 4;
if (fieldFromInstruction_4(Insn, 5, 1))
inc = 2;
break;
case 2:
if (fieldFromInstruction_4(Insn, 5, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 7, 1);
if (fieldFromInstruction_4(Insn, 4, 1) != 0)
align = 8;
if (fieldFromInstruction_4(Insn, 6, 1))
inc = 2;
break;
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd + inc, Address, Decoder)))
return MCDisassembler_Fail;
if (Rm != 0xF) { // Writeback
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
if (Rm != 0xF) {
if (Rm != 0xD) {
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address,
Decoder)))
return MCDisassembler_Fail;
} else
MCOperand_CreateReg0(Inst, (0));
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd + inc, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (index));
return S;
}
static DecodeStatus DecodeVST2LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
unsigned inc = 1;
switch (size) {
default:
return MCDisassembler_Fail;
case 0:
index = fieldFromInstruction_4(Insn, 5, 3);
if (fieldFromInstruction_4(Insn, 4, 1))
align = 2;
break;
case 1:
index = fieldFromInstruction_4(Insn, 6, 2);
if (fieldFromInstruction_4(Insn, 4, 1))
align = 4;
if (fieldFromInstruction_4(Insn, 5, 1))
inc = 2;
break;
case 2:
if (fieldFromInstruction_4(Insn, 5, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 7, 1);
if (fieldFromInstruction_4(Insn, 4, 1) != 0)
align = 8;
if (fieldFromInstruction_4(Insn, 6, 1))
inc = 2;
break;
}
if (Rm != 0xF) { // Writeback
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
if (Rm != 0xF) {
if (Rm != 0xD) {
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address,
Decoder)))
return MCDisassembler_Fail;
} else
MCOperand_CreateReg0(Inst, (0));
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd + inc, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (index));
return S;
}
static DecodeStatus DecodeVLD3LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
unsigned inc = 1;
switch (size) {
default:
return MCDisassembler_Fail;
case 0:
if (fieldFromInstruction_4(Insn, 4, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 5, 3);
break;
case 1:
if (fieldFromInstruction_4(Insn, 4, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 6, 2);
if (fieldFromInstruction_4(Insn, 5, 1))
inc = 2;
break;
case 2:
if (fieldFromInstruction_4(Insn, 4, 2))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 7, 1);
if (fieldFromInstruction_4(Insn, 6, 1))
inc = 2;
break;
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd + inc, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd + 2 * inc, Address,
Decoder)))
return MCDisassembler_Fail;
if (Rm != 0xF) { // Writeback
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
if (Rm != 0xF) {
if (Rm != 0xD) {
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address,
Decoder)))
return MCDisassembler_Fail;
} else
MCOperand_CreateReg0(Inst, (0));
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd + inc, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd + 2 * inc, Address,
Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (index));
return S;
}
static DecodeStatus DecodeVST3LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
unsigned inc = 1;
switch (size) {
default:
return MCDisassembler_Fail;
case 0:
if (fieldFromInstruction_4(Insn, 4, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 5, 3);
break;
case 1:
if (fieldFromInstruction_4(Insn, 4, 1))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 6, 2);
if (fieldFromInstruction_4(Insn, 5, 1))
inc = 2;
break;
case 2:
if (fieldFromInstruction_4(Insn, 4, 2))
return MCDisassembler_Fail; // UNDEFINED
index = fieldFromInstruction_4(Insn, 7, 1);
if (fieldFromInstruction_4(Insn, 6, 1))
inc = 2;
break;
}
if (Rm != 0xF) { // Writeback
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
if (Rm != 0xF) {
if (Rm != 0xD) {
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address,
Decoder)))
return MCDisassembler_Fail;
} else
MCOperand_CreateReg0(Inst, (0));
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd + inc, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd + 2 * inc, Address,
Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (index));
return S;
}
static DecodeStatus DecodeVLD4LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
unsigned inc = 1;
switch (size) {
default:
return MCDisassembler_Fail;
case 0:
if (fieldFromInstruction_4(Insn, 4, 1))
align = 4;
index = fieldFromInstruction_4(Insn, 5, 3);
break;
case 1:
if (fieldFromInstruction_4(Insn, 4, 1))
align = 8;
index = fieldFromInstruction_4(Insn, 6, 2);
if (fieldFromInstruction_4(Insn, 5, 1))
inc = 2;
break;
case 2:
switch (fieldFromInstruction_4(Insn, 4, 2)) {
case 0:
align = 0;
break;
case 3:
return MCDisassembler_Fail;
default:
align = 4 << fieldFromInstruction_4(Insn, 4, 2);
break;
}
index = fieldFromInstruction_4(Insn, 7, 1);
if (fieldFromInstruction_4(Insn, 6, 1))
inc = 2;
break;
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd + inc, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd + 2 * inc, Address,
Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd + 3 * inc, Address,
Decoder)))
return MCDisassembler_Fail;
if (Rm != 0xF) { // Writeback
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
if (Rm != 0xF) {
if (Rm != 0xD) {
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address,
Decoder)))
return MCDisassembler_Fail;
} else
MCOperand_CreateReg0(Inst, (0));
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd + inc, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd + 2 * inc, Address,
Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd + 3 * inc, Address,
Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (index));
return S;
}
static DecodeStatus DecodeVST4LN(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
unsigned inc = 1;
switch (size) {
default:
return MCDisassembler_Fail;
case 0:
if (fieldFromInstruction_4(Insn, 4, 1))
align = 4;
index = fieldFromInstruction_4(Insn, 5, 3);
break;
case 1:
if (fieldFromInstruction_4(Insn, 4, 1))
align = 8;
index = fieldFromInstruction_4(Insn, 6, 2);
if (fieldFromInstruction_4(Insn, 5, 1))
inc = 2;
break;
case 2:
switch (fieldFromInstruction_4(Insn, 4, 2)) {
case 0:
align = 0;
break;
case 3:
return MCDisassembler_Fail;
default:
align = 4 << fieldFromInstruction_4(Insn, 4, 2);
break;
}
index = fieldFromInstruction_4(Insn, 7, 1);
if (fieldFromInstruction_4(Insn, 6, 1))
inc = 2;
break;
}
if (Rm != 0xF) { // Writeback
if (!Check(&S,
DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
}
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (align));
if (Rm != 0xF) {
if (Rm != 0xD) {
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address,
Decoder)))
return MCDisassembler_Fail;
} else
MCOperand_CreateReg0(Inst, (0));
}
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodeDPRRegisterClass(Inst, Rd + inc, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd + 2 * inc, Address,
Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd + 3 * inc, Address,
Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (index));
return S;
}
static DecodeStatus DecodeVMOVSRR(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rt2 = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 5, 1);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
Rm |= fieldFromInstruction_4(Insn, 0, 4) << 1;
if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeSPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeSPRRegisterClass(Inst, Rm + 1, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt2, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeVMOVRRS(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rt2 = fieldFromInstruction_4(Insn, 16, 4);
unsigned Rm = fieldFromInstruction_4(Insn, 5, 1);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
Rm |= fieldFromInstruction_4(Insn, 0, 4) << 1;
if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt2, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeSPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeSPRRegisterClass(Inst, Rm + 1, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeIT(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned pred = fieldFromInstruction_4(Insn, 4, 4);
unsigned mask = fieldFromInstruction_4(Insn, 0, 4);
if (pred == 0xF) {
pred = 0xE;
S = MCDisassembler_SoftFail;
}
if (mask == 0x0)
return MCDisassembler_Fail;
// IT masks are encoded as a sequence of replacement low-order bits
// for the condition code. So if the low bit of the starting
// condition code is 1, then we have to flip all the bits above the
// terminating bit (which is the lowest 1 bit).
if (pred & 1) {
unsigned LowBit = mask & -mask;
unsigned BitsAboveLowBit = 0xF & (-LowBit << 1);
mask ^= BitsAboveLowBit;
}
MCOperand_CreateImm0(Inst, (pred));
MCOperand_CreateImm0(Inst, (mask));
return S;
}
static DecodeStatus DecodeT2LDRDPreInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rt2 = fieldFromInstruction_4(Insn, 8, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned addr = fieldFromInstruction_4(Insn, 0, 8);
unsigned W = fieldFromInstruction_4(Insn, 21, 1);
unsigned U = fieldFromInstruction_4(Insn, 23, 1);
unsigned P = fieldFromInstruction_4(Insn, 24, 1);
bool writeback = (W == 1) | (P == 0);
addr |= (U << 8) | (Rn << 9);
if (writeback && (Rn == Rt || Rn == Rt2))
Check(&S, MCDisassembler_SoftFail);
if (Rt == Rt2)
Check(&S, MCDisassembler_SoftFail);
// Rt
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
// Rt2
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
return MCDisassembler_Fail;
// Writeback operand
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
// addr
if (!Check(&S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeT2STRDPreInstruction(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rt2 = fieldFromInstruction_4(Insn, 8, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned addr = fieldFromInstruction_4(Insn, 0, 8);
unsigned W = fieldFromInstruction_4(Insn, 21, 1);
unsigned U = fieldFromInstruction_4(Insn, 23, 1);
unsigned P = fieldFromInstruction_4(Insn, 24, 1);
bool writeback = (W == 1) | (P == 0);
addr |= (U << 8) | (Rn << 9);
if (writeback && (Rn == Rt || Rn == Rt2))
Check(&S, MCDisassembler_SoftFail);
// Writeback operand
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
// Rt
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
// Rt2
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
return MCDisassembler_Fail;
// addr
if (!Check(&S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeT2Adr(MCInst *Inst, uint32_t Insn, uint64_t Address,
const void *Decoder)
{
unsigned sign1 = fieldFromInstruction_4(Insn, 21, 1);
unsigned sign2 = fieldFromInstruction_4(Insn, 23, 1);
if (sign1 != sign2)
return MCDisassembler_Fail;
const unsigned Rd = fieldFromInstruction_4(Insn, 8, 4);
DecodeStatus S = DecoderGPRRegisterClass(Inst, Rd, Address, Decoder);
unsigned Val = fieldFromInstruction_4(Insn, 0, 8);
Val |= fieldFromInstruction_4(Insn, 12, 3) << 8;
Val |= fieldFromInstruction_4(Insn, 26, 1) << 11;
// If sign, then it is decreasing the address.
if (sign1) {
// Following ARMv7 Architecture Manual, when the offset
// is zero, it is decoded as a subw, not as a adr.w
if (!Val) {
MCInst_setOpcode(Inst, (ARM_t2SUBri12));
MCOperand_CreateReg0(Inst, (ARM_PC));
} else
Val = -Val;
}
MCOperand_CreateImm0(Inst, (Val));
return S;
}
static DecodeStatus DecodeT2ShifterImmOperand(MCInst *Inst, uint32_t Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
// Shift of "asr #32" is not allowed in Thumb2 mode.
if (Val == 0x20)
S = MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (Val));
return S;
}
static DecodeStatus DecodeSwap(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
unsigned Rt2 = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
if (pred == 0xF)
return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
DecodeStatus S = MCDisassembler_Success;
if (Rt == Rn || Rn == Rt2)
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeVCVTD(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
bool hasFullFP16 =
ARM_getFeatureBits(Inst->csh->mode, ARM_FeatureFullFP16);
unsigned Vd = (fieldFromInstruction_4(Insn, 12, 4) << 0);
Vd |= (fieldFromInstruction_4(Insn, 22, 1) << 4);
unsigned Vm = (fieldFromInstruction_4(Insn, 0, 4) << 0);
Vm |= (fieldFromInstruction_4(Insn, 5, 1) << 4);
unsigned imm = fieldFromInstruction_4(Insn, 16, 6);
unsigned cmode = fieldFromInstruction_4(Insn, 8, 4);
unsigned op = fieldFromInstruction_4(Insn, 5, 1);
DecodeStatus S = MCDisassembler_Success;
// If the top 3 bits of imm are clear, this is a VMOV (immediate)
if (!(imm & 0x38)) {
if (cmode == 0xF) {
if (op == 1)
return MCDisassembler_Fail;
MCInst_setOpcode(Inst, (ARM_VMOVv2f32));
}
if (hasFullFP16) {
if (cmode == 0xE) {
if (op == 1) {
MCInst_setOpcode(Inst, (ARM_VMOVv1i64));
} else {
MCInst_setOpcode(Inst, (ARM_VMOVv8i8));
}
}
if (cmode == 0xD) {
if (op == 1) {
MCInst_setOpcode(Inst, (ARM_VMVNv2i32));
} else {
MCInst_setOpcode(Inst, (ARM_VMOVv2i32));
}
}
if (cmode == 0xC) {
if (op == 1) {
MCInst_setOpcode(Inst, (ARM_VMVNv2i32));
} else {
MCInst_setOpcode(Inst, (ARM_VMOVv2i32));
}
}
}
return DecodeVMOVModImmInstruction(Inst, Insn, Address,
Decoder);
}
if (!(imm & 0x20))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (64 - imm));
return S;
}
static DecodeStatus DecodeVCVTQ(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
bool hasFullFP16 =
ARM_getFeatureBits(Inst->csh->mode, ARM_FeatureFullFP16);
unsigned Vd = (fieldFromInstruction_4(Insn, 12, 4) << 0);
Vd |= (fieldFromInstruction_4(Insn, 22, 1) << 4);
unsigned Vm = (fieldFromInstruction_4(Insn, 0, 4) << 0);
Vm |= (fieldFromInstruction_4(Insn, 5, 1) << 4);
unsigned imm = fieldFromInstruction_4(Insn, 16, 6);
unsigned cmode = fieldFromInstruction_4(Insn, 8, 4);
unsigned op = fieldFromInstruction_4(Insn, 5, 1);
DecodeStatus S = MCDisassembler_Success;
// If the top 3 bits of imm are clear, this is a VMOV (immediate)
if (!(imm & 0x38)) {
if (cmode == 0xF) {
if (op == 1)
return MCDisassembler_Fail;
MCInst_setOpcode(Inst, (ARM_VMOVv4f32));
}
if (hasFullFP16) {
if (cmode == 0xE) {
if (op == 1) {
MCInst_setOpcode(Inst, (ARM_VMOVv2i64));
} else {
MCInst_setOpcode(Inst, (ARM_VMOVv16i8));
}
}
if (cmode == 0xD) {
if (op == 1) {
MCInst_setOpcode(Inst, (ARM_VMVNv4i32));
} else {
MCInst_setOpcode(Inst, (ARM_VMOVv4i32));
}
}
if (cmode == 0xC) {
if (op == 1) {
MCInst_setOpcode(Inst, (ARM_VMVNv4i32));
} else {
MCInst_setOpcode(Inst, (ARM_VMOVv4i32));
}
}
}
return DecodeVMOVModImmInstruction(Inst, Insn, Address,
Decoder);
}
if (!(imm & 0x20))
return MCDisassembler_Fail;
if (!Check(&S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (64 - imm));
return S;
}
static DecodeStatus DecodeNEONComplexLane64Instruction(MCInst *Inst,
unsigned Insn,
uint64_t Address,
const void *Decoder)
{
unsigned Vd = (fieldFromInstruction_4(Insn, 12, 4) << 0);
Vd |= (fieldFromInstruction_4(Insn, 22, 1) << 4);
unsigned Vn = (fieldFromInstruction_4(Insn, 16, 4) << 0);
Vn |= (fieldFromInstruction_4(Insn, 7, 1) << 4);
unsigned Vm = (fieldFromInstruction_4(Insn, 0, 4) << 0);
Vm |= (fieldFromInstruction_4(Insn, 5, 1) << 4);
unsigned q = (fieldFromInstruction_4(Insn, 6, 1) << 0);
unsigned rotate = (fieldFromInstruction_4(Insn, 20, 2) << 0);
DecodeStatus S = MCDisassembler_Success;
typedef DecodeStatus (*DecoderFunction)(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
DecoderFunction DestRegDecoder = q ? DecodeQPRRegisterClass :
DecodeDPRRegisterClass;
if (!Check(&S, DestRegDecoder(Inst, Vd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DestRegDecoder(Inst, Vd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DestRegDecoder(Inst, Vn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
return MCDisassembler_Fail;
// The lane index does not have any bits in the encoding, because it can
// only be 0.
MCOperand_CreateImm0(Inst, (0));
MCOperand_CreateImm0(Inst, (rotate));
return S;
}
static DecodeStatus DecodeLDR(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rn = fieldFromInstruction_4(Val, 16, 4);
unsigned Rt = fieldFromInstruction_4(Val, 12, 4);
unsigned Rm = fieldFromInstruction_4(Val, 0, 4);
Rm |= (fieldFromInstruction_4(Val, 23, 1) << 4);
unsigned Cond = fieldFromInstruction_4(Val, 28, 4);
if (fieldFromInstruction_4(Val, 8, 4) != 0 || Rn == Rt)
S = MCDisassembler_SoftFail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecoderForMRRC2AndMCRR2(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned CRm = fieldFromInstruction_4(Val, 0, 4);
unsigned opc1 = fieldFromInstruction_4(Val, 4, 4);
unsigned cop = fieldFromInstruction_4(Val, 8, 4);
unsigned Rt = fieldFromInstruction_4(Val, 12, 4);
unsigned Rt2 = fieldFromInstruction_4(Val, 16, 4);
if ((cop & ~0x1) == 0xa)
return MCDisassembler_Fail;
if (Rt == Rt2)
S = MCDisassembler_SoftFail;
// We have to check if the instruction is MRRC2
// or MCRR2 when constructing the operands for
// Inst. Reason is because MRRC2 stores to two
// registers so it's tablegen desc has has two
// outputs whereas MCRR doesn't store to any
// registers so all of its operands are listed
// as inputs, therefore the operand order for
// MRRC2 needs to be [Rt, Rt2, cop, opc1, CRm]
// and MCRR2 operand order is [cop, opc1, Rt, Rt2, CRm]
if (MCInst_getOpcode(Inst) == ARM_MRRC2) {
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt, Address,
Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address,
Decoder)))
return MCDisassembler_Fail;
}
MCOperand_CreateImm0(Inst, (cop));
MCOperand_CreateImm0(Inst, (opc1));
if (MCInst_getOpcode(Inst) == ARM_MCRR2) {
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt, Address,
Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address,
Decoder)))
return MCDisassembler_Fail;
}
MCOperand_CreateImm0(Inst, (CRm));
return S;
}
static DecodeStatus DecodeForVMRSandVMSR(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
// Add explicit operand for the destination sysreg, for cases where
// we have to model it for code generation purposes.
switch (MCInst_getOpcode(Inst)) {
case ARM_VMSR_FPSCR_NZCVQC:
MCOperand_CreateReg0(Inst, (ARM_FPSCR_NZCV));
break;
case ARM_VMSR_P0:
MCOperand_CreateReg0(Inst, (ARM_VPR));
break;
}
if (MCInst_getOpcode(Inst) != ARM_FMSTAT) {
unsigned Rt = fieldFromInstruction_4(Val, 12, 4);
if (ARM_getFeatureBits(Inst->csh->mode, ARM_ModeThumb) &&
!ARM_getFeatureBits(Inst->csh->mode, ARM_HasV8Ops)) {
if (Rt == 13 || Rt == 15)
S = MCDisassembler_SoftFail;
Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address,
Decoder));
} else
Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt, Address,
Decoder));
}
// Add explicit operand for the source sysreg, similarly to above.
switch (MCInst_getOpcode(Inst)) {
case ARM_VMRS_FPSCR_NZCVQC:
MCOperand_CreateReg0(Inst, (ARM_FPSCR_NZCV));
break;
case ARM_VMRS_P0:
MCOperand_CreateReg0(Inst, (ARM_VPR));
break;
}
if (ARM_getFeatureBits(Inst->csh->mode, ARM_ModeThumb)) {
MCOperand_CreateImm0(Inst, (ARMCC_AL));
MCOperand_CreateReg0(Inst, (0));
} else {
unsigned pred = fieldFromInstruction_4(Val, 28, 4);
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address,
Decoder)))
return MCDisassembler_Fail;
}
return S;
}
#define DEFINE_DecodeBFLabelOperand(isSigned, isNeg, zeroPermitted, size) \
static DecodeStatus CONCAT( \
DecodeBFLabelOperand, \
CONCAT(isSigned, CONCAT(isNeg, CONCAT(zeroPermitted, size))))( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder) \
{ \
DecodeStatus S = MCDisassembler_Success; \
if (Val == 0 && !zeroPermitted) \
S = MCDisassembler_Fail; \
\
uint64_t DecVal; \
if (isSigned) \
DecVal = SignExtend32((Val << 1), size + 1); \
else \
DecVal = (Val << 1); \
\
if (!tryAddingSymbolicOperand(Address, Address + DecVal + 4, \
true, 4, Inst, Decoder)) \
MCOperand_CreateImm0(Inst, \
(isNeg ? -DecVal : DecVal)); \
return S; \
}
DEFINE_DecodeBFLabelOperand(false, false, false, 4)
DEFINE_DecodeBFLabelOperand(true, false, true,
18) DEFINE_DecodeBFLabelOperand(true, false,
true, 12)
DEFINE_DecodeBFLabelOperand(true, false, true, 16)
DEFINE_DecodeBFLabelOperand(false, true, true, 11)
DEFINE_DecodeBFLabelOperand(false, false, true,
11)
static DecodeStatus
DecodeBFAfterTargetOperand(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder)
{
uint64_t LocImm = MCOperand_getImm(MCInst_getOperand(Inst, (0)));
Val = LocImm + (2 << Val);
if (!tryAddingSymbolicOperand(Address, Address + Val + 4, true, 4, Inst,
Decoder))
MCOperand_CreateImm0(Inst, (Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodePredNoALOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
if (Val >= ARMCC_AL) // also exclude the non-condition NV
return MCDisassembler_Fail;
MCOperand_CreateImm0(Inst, (Val));
return MCDisassembler_Success;
}
static DecodeStatus DecodeLOLoop(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if (MCInst_getOpcode(Inst) == ARM_MVE_LCTP)
return S;
unsigned Imm = fieldFromInstruction_4(Insn, 11, 1) |
fieldFromInstruction_4(Insn, 1, 10) << 1;
switch (MCInst_getOpcode(Inst)) {
case ARM_t2LEUpdate:
case ARM_MVE_LETP:
MCOperand_CreateReg0(Inst, (ARM_LR));
MCOperand_CreateReg0(Inst, (ARM_LR));
// fall through
case ARM_t2LE:
if (!Check(&S, CONCAT(DecodeBFLabelOperand,
CONCAT(false,
CONCAT(true, CONCAT(true, 11))))(
Inst, Imm, Address, Decoder)))
return MCDisassembler_Fail;
break;
case ARM_t2WLS:
case ARM_MVE_WLSTP_8:
case ARM_MVE_WLSTP_16:
case ARM_MVE_WLSTP_32:
case ARM_MVE_WLSTP_64:
MCOperand_CreateReg0(Inst, (ARM_LR));
if (!Check(&S,
DecoderGPRRegisterClass(
Inst, fieldFromInstruction_4(Insn, 16, 4),
Address, Decoder)) ||
!Check(&S, CONCAT(DecodeBFLabelOperand,
CONCAT(false,
CONCAT(false, CONCAT(true, 11))))(
Inst, Imm, Address, Decoder)))
return MCDisassembler_Fail;
break;
case ARM_t2DLS:
case ARM_MVE_DLSTP_8:
case ARM_MVE_DLSTP_16:
case ARM_MVE_DLSTP_32:
case ARM_MVE_DLSTP_64: {
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
if (Rn == 0xF) {
// Enforce all the rest of the instruction bits in LCTP, which
// won't have been reliably checked based on LCTP's own tablegen
// record, because we came to this decode by a roundabout route.
uint32_t CanonicalLCTP = 0xF00FE001,
SBZMask = 0x00300FFE;
if ((Insn & ~SBZMask) != CanonicalLCTP)
return MCDisassembler_Fail; // a mandatory bit is wrong: hard
// fail
if (Insn != CanonicalLCTP)
Check(&S,
MCDisassembler_SoftFail); // an SBZ bit is wrong: soft fail
MCInst_setOpcode(Inst, (ARM_MVE_LCTP));
} else {
MCOperand_CreateReg0(Inst, (ARM_LR));
if (!Check(&S,
DecoderGPRRegisterClass(
Inst,
fieldFromInstruction_4(Insn, 16, 4),
Address, Decoder)))
return MCDisassembler_Fail;
}
break;
}
}
return S;
}
static DecodeStatus DecodeLongShiftOperand(MCInst *Inst, unsigned Val,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
if (Val == 0)
Val = 32;
MCOperand_CreateImm0(Inst, (Val));
return S;
}
static DecodeStatus DecodetGPROddRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if ((RegNo) + 1 > 11)
return MCDisassembler_Fail;
unsigned Register = GPRDecoderTable[(RegNo) + 1];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static DecodeStatus DecodetGPREvenRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if ((RegNo) > 14)
return MCDisassembler_Fail;
unsigned Register = GPRDecoderTable[(RegNo)];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static DecodeStatus DecodeGPRwithAPSR_NZCVnospRegisterClass(MCInst *Inst,
unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo == 15) {
MCOperand_CreateReg0(Inst, (ARM_APSR_NZCV));
return MCDisassembler_Success;
}
unsigned Register = GPRDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
if (RegNo == 13)
return MCDisassembler_SoftFail;
return MCDisassembler_Success;
}
static DecodeStatus DecodeVSCCLRM(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
MCOperand_CreateImm0(Inst, (ARMCC_AL));
MCOperand_CreateReg0(Inst, (0));
if (MCInst_getOpcode(Inst) == ARM_VSCCLRMD) {
unsigned reglist = (fieldFromInstruction_4(Insn, 1, 7) << 1) |
(fieldFromInstruction_4(Insn, 12, 4) << 8) |
(fieldFromInstruction_4(Insn, 22, 1) << 12);
if (!Check(&S, DecodeDPRRegListOperand(Inst, reglist, Address,
Decoder))) {
return MCDisassembler_Fail;
}
} else {
unsigned reglist = fieldFromInstruction_4(Insn, 0, 8) |
(fieldFromInstruction_4(Insn, 22, 1) << 8) |
(fieldFromInstruction_4(Insn, 12, 4) << 9);
if (!Check(&S, DecodeSPRRegListOperand(Inst, reglist, Address,
Decoder))) {
return MCDisassembler_Fail;
}
}
MCOperand_CreateReg0(Inst, (ARM_VPR));
return S;
}
static DecodeStatus DecodeMQPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 7)
return MCDisassembler_Fail;
unsigned Register = QPRDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static const uint16_t QQPRDecoderTable[] = { ARM_Q0_Q1, ARM_Q1_Q2, ARM_Q2_Q3,
ARM_Q3_Q4, ARM_Q4_Q5, ARM_Q5_Q6,
ARM_Q6_Q7 };
static DecodeStatus DecodeMQQPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 6)
return MCDisassembler_Fail;
unsigned Register = QQPRDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static const uint16_t QQQQPRDecoderTable[] = { ARM_Q0_Q1_Q2_Q3, ARM_Q1_Q2_Q3_Q4,
ARM_Q2_Q3_Q4_Q5, ARM_Q3_Q4_Q5_Q6,
ARM_Q4_Q5_Q6_Q7 };
static DecodeStatus DecodeMQQQQPRRegisterClass(MCInst *Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder)
{
if (RegNo > 4)
return MCDisassembler_Fail;
unsigned Register = QQQQPRDecoderTable[RegNo];
MCOperand_CreateReg0(Inst, (Register));
return MCDisassembler_Success;
}
static DecodeStatus DecodeVPTMaskOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
// Parse VPT mask and encode it in the MCInst as an immediate with the same
// format as the it_mask. That is, from the second 'e|t' encode 'e' as 1
// and 't' as 0 and finish with a 1.
unsigned Imm = 0;
// We always start with a 't'.
unsigned CurBit = 0;
for (int i = 3; i >= 0; --i) {
// If the bit we are looking at is not the same as last one, invert the
// CurBit, if it is the same leave it as is.
CurBit ^= (Val >> i) & 1U;
// Encode the CurBit at the right place in the immediate.
Imm |= (CurBit << i);
// If we are done, finish the encoding with a 1.
if ((Val & ~(~0U << i)) == 0) {
Imm |= 1U << i;
break;
}
}
MCOperand_CreateImm0(Inst, (Imm));
return S;
}
static DecodeStatus DecodeVpredROperand(MCInst *Inst, unsigned RegNo,
uint64_t Address, const void *Decoder)
{
// The vpred_r operand type includes an MQPR register field derived
// from the encoding. But we don't actually want to add an operand
// to the MCInst at this stage, because AddThumbPredicate will do it
// later, and will infer the register number from the TIED_TO
// constraint. So this is a deliberately empty decoder method that
// will inhibit the auto-generated disassembly code from adding an
// operand at all.
return MCDisassembler_Success;
}
static DecodeStatus DecodeRestrictedIPredicateOperand(MCInst *Inst,
unsigned Val,
uint64_t Address,
const void *Decoder)
{
MCOperand_CreateImm0(Inst, ((Val & 0x1) == 0 ? ARMCC_EQ : ARMCC_NE));
return MCDisassembler_Success;
}
static DecodeStatus DecodeRestrictedSPredicateOperand(MCInst *Inst,
unsigned Val,
uint64_t Address,
const void *Decoder)
{
unsigned Code;
switch (Val & 0x3) {
case 0:
Code = ARMCC_GE;
break;
case 1:
Code = ARMCC_LT;
break;
case 2:
Code = ARMCC_GT;
break;
case 3:
Code = ARMCC_LE;
break;
}
MCOperand_CreateImm0(Inst, (Code));
return MCDisassembler_Success;
}
static DecodeStatus DecodeRestrictedUPredicateOperand(MCInst *Inst,
unsigned Val,
uint64_t Address,
const void *Decoder)
{
MCOperand_CreateImm0(Inst, ((Val & 0x1) == 0 ? ARMCC_HS : ARMCC_HI));
return MCDisassembler_Success;
}
static DecodeStatus DecodeRestrictedFPPredicateOperand(MCInst *Inst,
unsigned Val,
uint64_t Address,
const void *Decoder)
{
unsigned Code;
switch (Val) {
default:
return MCDisassembler_Fail;
case 0:
Code = ARMCC_EQ;
break;
case 1:
Code = ARMCC_NE;
break;
case 4:
Code = ARMCC_GE;
break;
case 5:
Code = ARMCC_LT;
break;
case 6:
Code = ARMCC_GT;
break;
case 7:
Code = ARMCC_LE;
break;
}
MCOperand_CreateImm0(Inst, (Code));
return MCDisassembler_Success;
}
static DecodeStatus DecodeVCVTImmOperand(MCInst *Inst, unsigned Val,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned DecodedVal = 64 - Val;
switch (MCInst_getOpcode(Inst)) {
case ARM_MVE_VCVTf16s16_fix:
case ARM_MVE_VCVTs16f16_fix:
case ARM_MVE_VCVTf16u16_fix:
case ARM_MVE_VCVTu16f16_fix:
if (DecodedVal > 16)
return MCDisassembler_Fail;
break;
case ARM_MVE_VCVTf32s32_fix:
case ARM_MVE_VCVTs32f32_fix:
case ARM_MVE_VCVTf32u32_fix:
case ARM_MVE_VCVTu32f32_fix:
if (DecodedVal > 32)
return MCDisassembler_Fail;
break;
}
MCOperand_CreateImm0(Inst, (64 - Val));
return S;
}
static unsigned FixedRegForVSTRVLDR_SYSREG(unsigned Opcode)
{
switch (Opcode) {
case ARM_VSTR_P0_off:
case ARM_VSTR_P0_pre:
case ARM_VSTR_P0_post:
case ARM_VLDR_P0_off:
case ARM_VLDR_P0_pre:
case ARM_VLDR_P0_post:
return ARM_P0;
default:
return 0;
}
}
#define DEFINE_DecodeVSTRVLDR_SYSREG(Writeback) \
static DecodeStatus CONCAT(DecodeVSTRVLDR_SYSREG, Writeback)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder) \
{ \
switch (MCInst_getOpcode(Inst)) { \
case ARM_VSTR_FPSCR_pre: \
case ARM_VSTR_FPSCR_NZCVQC_pre: \
case ARM_VLDR_FPSCR_pre: \
case ARM_VLDR_FPSCR_NZCVQC_pre: \
case ARM_VSTR_FPSCR_off: \
case ARM_VSTR_FPSCR_NZCVQC_off: \
case ARM_VLDR_FPSCR_off: \
case ARM_VLDR_FPSCR_NZCVQC_off: \
case ARM_VSTR_FPSCR_post: \
case ARM_VSTR_FPSCR_NZCVQC_post: \
case ARM_VLDR_FPSCR_post: \
case ARM_VLDR_FPSCR_NZCVQC_post: \
\
if (!ARM_getFeatureBits(Inst->csh->mode, \
ARM_HasMVEIntegerOps) && \
!ARM_getFeatureBits(Inst->csh->mode, \
ARM_FeatureVFP2)) \
return MCDisassembler_Fail; \
} \
\
DecodeStatus S = MCDisassembler_Success; \
unsigned Sysreg = \
FixedRegForVSTRVLDR_SYSREG(MCInst_getOpcode(Inst)); \
if (Sysreg) \
MCOperand_CreateReg0(Inst, (Sysreg)); \
unsigned Rn = fieldFromInstruction_4(Val, 16, 4); \
unsigned addr = fieldFromInstruction_4(Val, 0, 7) | \
(fieldFromInstruction_4(Val, 23, 1) << 7) | \
(Rn << 8); \
\
if (Writeback) { \
if (!Check(&S, DecodeGPRnopcRegisterClass( \
Inst, Rn, Address, Decoder))) \
return MCDisassembler_Fail; \
} \
if (!Check(&S, DecodeT2AddrModeImm7s4(Inst, addr, Address, \
Decoder))) \
return MCDisassembler_Fail; \
\
MCOperand_CreateImm0(Inst, (ARMCC_AL)); \
MCOperand_CreateReg0(Inst, (0)); \
\
return S; \
}
DEFINE_DecodeVSTRVLDR_SYSREG(false) DEFINE_DecodeVSTRVLDR_SYSREG(true)
static inline DecodeStatus
DecodeMVE_MEM_pre(MCInst *Inst, unsigned Val, uint64_t Address,
const void *Decoder, unsigned Rn,
OperandDecoder RnDecoder, OperandDecoder AddrDecoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Qd = fieldFromInstruction_4(Val, 13, 3);
unsigned addr = fieldFromInstruction_4(Val, 0, 7) |
(fieldFromInstruction_4(Val, 23, 1) << 7) | (Rn << 8);
if (!Check(&S, RnDecoder(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, AddrDecoder(Inst, addr, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
#define DEFINE_DecodeMVE_MEM_1_pre(shift) \
static DecodeStatus CONCAT(DecodeMVE_MEM_1_pre, shift)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder) \
{ \
return DecodeMVE_MEM_pre(Inst, Val, Address, Decoder, \
fieldFromInstruction_4(Val, 16, 3), \
DecodetGPRRegisterClass, \
CONCAT(DecodeTAddrModeImm7, shift)); \
}
DEFINE_DecodeMVE_MEM_1_pre(0) DEFINE_DecodeMVE_MEM_1_pre(1)
#define DEFINE_DecodeMVE_MEM_2_pre(shift) \
static DecodeStatus CONCAT(DecodeMVE_MEM_2_pre, shift)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder) \
{ \
return DecodeMVE_MEM_pre(Inst, Val, Address, Decoder, \
fieldFromInstruction_4(Val, 16, 4), \
DecoderGPRRegisterClass, \
CONCAT(DecodeT2AddrModeImm7, \
CONCAT(shift, 1))); \
}
DEFINE_DecodeMVE_MEM_2_pre(0) DEFINE_DecodeMVE_MEM_2_pre(
1) DEFINE_DecodeMVE_MEM_2_pre(2)
#define DEFINE_DecodeMVE_MEM_3_pre(shift) \
static DecodeStatus CONCAT(DecodeMVE_MEM_3_pre, shift)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder) \
{ \
return DecodeMVE_MEM_pre(Inst, Val, Address, Decoder, \
fieldFromInstruction_4(Val, 17, 3), \
DecodeMQPRRegisterClass, \
CONCAT(DecodeMveAddrModeQ, shift)); \
}
DEFINE_DecodeMVE_MEM_3_pre(2) DEFINE_DecodeMVE_MEM_3_pre(3)
#define DEFINE_DecodePowerTwoOperand(MinLog, MaxLog) \
static DecodeStatus CONCAT(DecodePowerTwoOperand, \
CONCAT(MinLog, MaxLog))( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder) \
{ \
DecodeStatus S = MCDisassembler_Success; \
\
if (Val < MinLog || Val > MaxLog) \
return MCDisassembler_Fail; \
\
MCOperand_CreateImm0(Inst, (1LL << Val)); \
return S; \
}
DEFINE_DecodePowerTwoOperand(0, 3)
#define DEFINE_DecodeMVEPairVectorIndexOperand(start) \
static DecodeStatus CONCAT(DecodeMVEPairVectorIndexOperand, start)( \
MCInst * Inst, unsigned Val, uint64_t Address, \
const void *Decoder) \
{ \
DecodeStatus S = MCDisassembler_Success; \
\
MCOperand_CreateImm0(Inst, (start + Val)); \
\
return S; \
}
DEFINE_DecodeMVEPairVectorIndexOperand(2)
DEFINE_DecodeMVEPairVectorIndexOperand(0)
static DecodeStatus
DecodeMVEVMOVQtoDReg(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rt2 = fieldFromInstruction_4(Insn, 16, 4);
unsigned Qd = ((fieldFromInstruction_4(Insn, 22, 1) << 3) |
fieldFromInstruction_4(Insn, 13, 3));
unsigned index = fieldFromInstruction_4(Insn, 4, 1);
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt2, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, CONCAT(DecodeMVEPairVectorIndexOperand,
2)(Inst, index, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, CONCAT(DecodeMVEPairVectorIndexOperand,
0)(Inst, index, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeMVEVMOVDRegtoQ(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Rt = fieldFromInstruction_4(Insn, 0, 4);
unsigned Rt2 = fieldFromInstruction_4(Insn, 16, 4);
unsigned Qd = ((fieldFromInstruction_4(Insn, 22, 1) << 3) |
fieldFromInstruction_4(Insn, 13, 3));
unsigned index = fieldFromInstruction_4(Insn, 4, 1);
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt2, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, CONCAT(DecodeMVEPairVectorIndexOperand,
2)(Inst, index, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, CONCAT(DecodeMVEPairVectorIndexOperand,
0)(Inst, index, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeMVEOverlappingLongShift(MCInst *Inst, unsigned Insn,
uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned RdaLo = fieldFromInstruction_4(Insn, 17, 3) << 1;
unsigned RdaHi = fieldFromInstruction_4(Insn, 9, 3) << 1;
unsigned Rm = fieldFromInstruction_4(Insn, 12, 4);
if (RdaHi == 14) {
// This value of RdaHi (really indicating pc, because RdaHi has to
// be an odd-numbered register, so the low bit will be set by the
// decode function below) indicates that we must decode as SQRSHR
// or UQRSHL, which both have a single Rda register field with all
// four bits.
unsigned Rda = fieldFromInstruction_4(Insn, 16, 4);
switch (MCInst_getOpcode(Inst)) {
case ARM_MVE_ASRLr:
case ARM_MVE_SQRSHRL:
MCInst_setOpcode(Inst, (ARM_MVE_SQRSHR));
break;
case ARM_MVE_LSLLr:
case ARM_MVE_UQRSHLL:
MCInst_setOpcode(Inst, (ARM_MVE_UQRSHL));
break;
default:
// llvm_unreachable("Unexpected starting opcode!");
break;
}
// Rda as output parameter
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rda, Address,
Decoder)))
return MCDisassembler_Fail;
// Rda again as input parameter
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rda, Address,
Decoder)))
return MCDisassembler_Fail;
// Rm, the amount to shift by
if (!Check(&S,
DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
if (fieldFromInstruction_4(Insn, 6, 3) != 4)
return MCDisassembler_SoftFail;
if (Rda == Rm)
return MCDisassembler_SoftFail;
return S;
}
// Otherwise, we decode as whichever opcode our caller has already
// put into Inst. Those all look the same:
// RdaLo,RdaHi as output parameters
if (!Check(&S,
DecodetGPREvenRegisterClass(Inst, RdaLo, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodetGPROddRegisterClass(Inst, RdaHi, Address, Decoder)))
return MCDisassembler_Fail;
// RdaLo,RdaHi again as input parameters
if (!Check(&S,
DecodetGPREvenRegisterClass(Inst, RdaLo, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S,
DecodetGPROddRegisterClass(Inst, RdaHi, Address, Decoder)))
return MCDisassembler_Fail;
// Rm, the amount to shift by
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler_Fail;
if (MCInst_getOpcode(Inst) == ARM_MVE_SQRSHRL ||
MCInst_getOpcode(Inst) == ARM_MVE_UQRSHLL) {
unsigned Saturate = fieldFromInstruction_4(Insn, 7, 1);
// Saturate, the bit position for saturation
MCOperand_CreateImm0(Inst, (Saturate));
}
return S;
}
static DecodeStatus DecodeMVEVCVTt1fp(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
unsigned Qd = ((fieldFromInstruction_4(Insn, 22, 1) << 3) |
fieldFromInstruction_4(Insn, 13, 3));
unsigned Qm = ((fieldFromInstruction_4(Insn, 5, 1) << 3) |
fieldFromInstruction_4(Insn, 1, 3));
unsigned imm6 = fieldFromInstruction_4(Insn, 16, 6);
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qd, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qm, Address, Decoder)))
return MCDisassembler_Fail;
if (!Check(&S, DecodeVCVTImmOperand(Inst, imm6, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
#define DEFINE_DecodeMVEVCMP(scalar, predicate_decoder) \
static DecodeStatus CONCAT(DecodeMVEVCMP, \
CONCAT(scalar, predicate_decoder))( \
MCInst * Inst, unsigned Insn, uint64_t Address, \
const void *Decoder) \
{ \
DecodeStatus S = MCDisassembler_Success; \
MCOperand_CreateReg0(Inst, (ARM_VPR)); \
unsigned Qn = fieldFromInstruction_4(Insn, 17, 3); \
if (!Check(&S, DecodeMQPRRegisterClass(Inst, Qn, Address, \
Decoder))) \
return MCDisassembler_Fail; \
\
unsigned fc; \
\
if (scalar) { \
fc = fieldFromInstruction_4(Insn, 12, 1) << 2 | \
fieldFromInstruction_4(Insn, 7, 1) | \
fieldFromInstruction_4(Insn, 5, 1) << 1; \
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4); \
if (!Check(&S, DecodeGPRwithZRRegisterClass( \
Inst, Rm, Address, Decoder))) \
return MCDisassembler_Fail; \
} else { \
fc = fieldFromInstruction_4(Insn, 12, 1) << 2 | \
fieldFromInstruction_4(Insn, 7, 1) | \
fieldFromInstruction_4(Insn, 0, 1) << 1; \
unsigned Qm = fieldFromInstruction_4(Insn, 5, 1) \
<< 4 | \
fieldFromInstruction_4(Insn, 1, 3); \
if (!Check(&S, DecodeMQPRRegisterClass( \
Inst, Qm, Address, Decoder))) \
return MCDisassembler_Fail; \
} \
\
if (!Check(&S, predicate_decoder(Inst, fc, Address, Decoder))) \
return MCDisassembler_Fail; \
\
MCOperand_CreateImm0(Inst, (ARMVCC_None)); \
MCOperand_CreateReg0(Inst, (0)); \
MCOperand_CreateImm0(Inst, (0)); \
\
return S; \
}
DEFINE_DecodeMVEVCMP(false, DecodeRestrictedIPredicateOperand) DEFINE_DecodeMVEVCMP(
false, DecodeRestrictedUPredicateOperand)
DEFINE_DecodeMVEVCMP(false, DecodeRestrictedSPredicateOperand)
DEFINE_DecodeMVEVCMP(true, DecodeRestrictedIPredicateOperand)
DEFINE_DecodeMVEVCMP(true,
DecodeRestrictedUPredicateOperand)
DEFINE_DecodeMVEVCMP(
true, DecodeRestrictedSPredicateOperand)
DEFINE_DecodeMVEVCMP(
false,
DecodeRestrictedFPPredicateOperand)
DEFINE_DecodeMVEVCMP(
true,
DecodeRestrictedFPPredicateOperand)
static DecodeStatus
DecodeMveVCTP(MCInst *Inst, unsigned Insn, uint64_t Address,
const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
MCOperand_CreateReg0(Inst, (ARM_VPR));
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler_Fail;
return S;
}
static DecodeStatus DecodeMVEVPNOT(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
DecodeStatus S = MCDisassembler_Success;
MCOperand_CreateReg0(Inst, (ARM_VPR));
MCOperand_CreateReg0(Inst, (ARM_VPR));
return S;
}
static DecodeStatus DecodeT2AddSubSPImm(MCInst *Inst, unsigned Insn,
uint64_t Address, const void *Decoder)
{
const unsigned Rd = fieldFromInstruction_4(Insn, 8, 4);
const unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
const unsigned Imm12 = fieldFromInstruction_4(Insn, 26, 1) << 11 |
fieldFromInstruction_4(Insn, 12, 3) << 8 |
fieldFromInstruction_4(Insn, 0, 8);
const unsigned TypeT3 = fieldFromInstruction_4(Insn, 25, 1);
unsigned sign1 = fieldFromInstruction_4(Insn, 21, 1);
unsigned sign2 = fieldFromInstruction_4(Insn, 23, 1);
unsigned S = fieldFromInstruction_4(Insn, 20, 1);
if (sign1 != sign2)
return MCDisassembler_Fail;
// T3 does a zext of imm12, where T2 does a ThumbExpandImm (T2SOImm)
DecodeStatus DS = MCDisassembler_Success;
if ((!Check(&DS, DecodeGPRspRegisterClass(Inst, Rd, Address,
Decoder))) || // dst
(!Check(&DS, DecodeGPRspRegisterClass(Inst, Rn, Address, Decoder))))
return MCDisassembler_Fail;
if (TypeT3) {
MCInst_setOpcode(Inst,
(sign1 ? ARM_t2SUBspImm12 : ARM_t2ADDspImm12));
MCOperand_CreateImm0(Inst, (Imm12)); // zext imm12
} else {
MCInst_setOpcode(Inst,
(sign1 ? ARM_t2SUBspImm : ARM_t2ADDspImm));
if (!Check(&DS, DecodeT2SOImm(Inst, Imm12, Address,
Decoder))) // imm12
return MCDisassembler_Fail;
if (!Check(&DS, DecodeCCOutOperand(Inst, S, Address,
Decoder))) // cc_out
return MCDisassembler_Fail;
}
return DS;
}
DecodeStatus ARM_LLVM_getInstruction(csh handle, const uint8_t *code,
size_t code_len, MCInst *instr,
uint16_t *size, uint64_t address,
void *info)
{
return getInstruction(handle, code, code_len, instr, size, address,
info);
}