| /* Table of opcodes for the OpenRISC 1000 ISA. |
| Copyright 2002, 2003 Free Software Foundation, Inc. |
| Contributed by Damjan Lampret (lampret@opencores.org). |
| |
| This file is part of or1k_gen_isa, or1ksim, GDB and GAS. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| |
| /* We treat all letters the same in encode/decode routines so |
| we need to assign some characteristics to them like signess etc. */ |
| |
| #ifndef OR32_H_ISA |
| #define OR32_H_ISA |
| |
| #define NUM_UNSIGNED (0) |
| #define NUM_SIGNED (1) |
| |
| #define MAX_GPRS 32 |
| #define PAGE_SIZE 4096 |
| #undef __HALF_WORD_INSN__ |
| |
| #define OPERAND_DELIM (',') |
| |
| #define OR32_IF_DELAY (1) |
| #define OR32_W_FLAG (2) |
| #define OR32_R_FLAG (4) |
| |
| struct or32_letter |
| { |
| char letter; |
| int sign; |
| /* int reloc; relocation per letter ?? */ |
| }; |
| |
| /* Main instruction specification array. */ |
| struct or32_opcode |
| { |
| /* Name of the instruction. */ |
| char *name; |
| |
| /* A string of characters which describe the operands. |
| Valid characters are: |
| ,() Itself. Characters appears in the assembly code. |
| rA Register operand. |
| rB Register operand. |
| rD Register operand. |
| I An immediate operand, range -32768 to 32767. |
| J An immediate operand, range . (unused) |
| K An immediate operand, range 0 to 65535. |
| L An immediate operand, range 0 to 63. |
| M An immediate operand, range . (unused) |
| N An immediate operand, range -33554432 to 33554431. |
| O An immediate operand, range . (unused). */ |
| char *args; |
| |
| /* Opcode and operand encoding. */ |
| char *encoding; |
| void (*exec) (void); |
| unsigned int flags; |
| }; |
| |
| #define OPTYPE_LAST (0x80000000) |
| #define OPTYPE_OP (0x40000000) |
| #define OPTYPE_REG (0x20000000) |
| #define OPTYPE_SIG (0x10000000) |
| #define OPTYPE_DIS (0x08000000) |
| #define OPTYPE_DST (0x04000000) |
| #define OPTYPE_SBIT (0x00001F00) |
| #define OPTYPE_SHR (0x0000001F) |
| #define OPTYPE_SBIT_SHR (8) |
| |
| /* MM: Data how to decode operands. */ |
| extern struct insn_op_struct |
| { |
| unsigned long type; |
| unsigned long data; |
| } **op_start; |
| |
| #ifdef HAS_EXECUTION |
| extern void l_invalid (void); |
| extern void l_sfne (void); |
| extern void l_bf (void); |
| extern void l_add (void); |
| extern void l_sw (void); |
| extern void l_sb (void); |
| extern void l_sh (void); |
| extern void l_lwz (void); |
| extern void l_lbs (void); |
| extern void l_lbz (void); |
| extern void l_lhs (void); |
| extern void l_lhz (void); |
| extern void l_movhi (void); |
| extern void l_and (void); |
| extern void l_or (void); |
| extern void l_xor (void); |
| extern void l_sub (void); |
| extern void l_mul (void); |
| extern void l_div (void); |
| extern void l_divu (void); |
| extern void l_sll (void); |
| extern void l_sra (void); |
| extern void l_srl (void); |
| extern void l_j (void); |
| extern void l_jal (void); |
| extern void l_jalr (void); |
| extern void l_jr (void); |
| extern void l_rfe (void); |
| extern void l_nop (void); |
| extern void l_bnf (void); |
| extern void l_sfeq (void); |
| extern void l_sfgts (void); |
| extern void l_sfges (void); |
| extern void l_sflts (void); |
| extern void l_sfles (void); |
| extern void l_sfgtu (void); |
| extern void l_sfgeu (void); |
| extern void l_sfltu (void); |
| extern void l_sfleu (void); |
| extern void l_mtspr (void); |
| extern void l_mfspr (void); |
| extern void l_sys (void); |
| extern void l_trap (void); /* CZ 21/06/01. */ |
| extern void l_macrc (void); |
| extern void l_mac (void); |
| extern void l_msb (void); |
| extern void l_invalid (void); |
| extern void l_cust1 (void); |
| extern void l_cust2 (void); |
| extern void l_cust3 (void); |
| extern void l_cust4 (void); |
| #endif |
| extern void l_none (void); |
| |
| extern const struct or32_letter or32_letters[]; |
| |
| extern const struct or32_opcode or32_opcodes[]; |
| |
| extern const unsigned int or32_num_opcodes; |
| |
| /* Calculates instruction length in bytes. Always 4 for OR32. */ |
| extern int insn_len (int); |
| |
| /* Is individual insn's operand signed or unsigned? */ |
| extern int letter_signed (char); |
| |
| /* Number of letters in the individual lettered operand. */ |
| extern int letter_range (char); |
| |
| /* MM: Returns index of given instruction name. */ |
| extern int insn_index (char *); |
| |
| /* MM: Returns instruction name from index. */ |
| extern const char *insn_name (int); |
| |
| /* MM: Constructs new FSM, based on or32_opcodes. */ |
| extern void build_automata (void); |
| |
| /* MM: Destructs FSM. */ |
| extern void destruct_automata (void); |
| |
| /* MM: Decodes instruction using FSM. Call build_automata first. */ |
| extern int insn_decode (unsigned int); |
| |
| /* Disassemble one instruction from insn to disassemble. |
| Return the size of the instruction. */ |
| int disassemble_insn (unsigned long); |
| |
| #endif |