| // RUN: llvm-tblgen -gen-disassembler -I %p/../../../include %s | FileCheck %s |
| |
| include "llvm/Target/Target.td" |
| |
| class I : Instruction { |
| let InOperandList = (ins i32imm:$op); |
| let OutOperandList = (outs); |
| } |
| |
| // Check that we don't try to read the second byte without ruling out |
| // 1-byte encodings first. This should actually be a decoding conflict, |
| // but DecoderEmitter heuristics decide that I8_0 and I8_1 are more specific |
| // than the rest and give them priority. |
| |
| // _______0 I8_0 |
| // _______1 I8_1 |
| // 00000000 ________ I16_0 |
| // 00000001 ________ I16_1 |
| // 00000010 ________ I16_2 |
| |
| // CHECK: MCD::OPC_ExtractField, 0, 1, // Inst{0} ... |
| // CHECK-NEXT: MCD::OPC_FilterValue, 0, 4, 0, // Skip to: 11 |
| // CHECK-NEXT: MCD::OPC_Decode, {{[0-9]+}}, 2, 0, // Opcode: I8_0, DecodeIdx: 0 |
| // CHECK-NEXT: MCD::OPC_FilterValue, 1, 4, 0, // Skip to: 19 |
| // CHECK-NEXT: MCD::OPC_Decode, {{[0-9]+}}, 2, 0, // Opcode: I8_1, DecodeIdx: 0 |
| // CHECK-NEXT: MCD::OPC_ExtractField, 8, 8, // Inst{15-8} ... |
| // CHECK-NEXT: MCD::OPC_FilterValue, 0, 4, 0, // Skip to: 30 |
| // CHECK-NEXT: MCD::OPC_Decode, {{[0-9]+}}, 2, 1, // Opcode: I16_0, DecodeIdx: 1 |
| // CHECK-NEXT: MCD::OPC_FilterValue, 1, 4, 0, // Skip to: 38 |
| // CHECK-NEXT: MCD::OPC_Decode, {{[0-9]+}}, 2, 1, // Opcode: I16_1, DecodeIdx: 1 |
| // CHECK-NEXT: MCD::OPC_FilterValueOrFail, 2, |
| // CHECK-NEXT: MCD::OPC_Decode, {{[0-9]+}}, 2, 1, // Opcode: I16_2, DecodeIdx: 1 |
| |
| def I8_0 : I { dag Inst = (descend (operand "$op", 7), 0b0); } |
| def I8_1 : I { dag Inst = (descend (operand "$op", 7), 0b1); } |
| def I16_0 : I { dag Inst = (descend 0b00000000, (operand "$op", 8)); } |
| def I16_1 : I { dag Inst = (descend 0b00000001, (operand "$op", 8)); } |
| def I16_2 : I { dag Inst = (descend 0b00000010, (operand "$op", 8)); } |
| |
| def II : InstrInfo; |
| |
| def MyTarget : Target { |
| let InstructionSet = II; |
| } |
