1/* Table of opcodes for the OpenRISC 1000 ISA. 2 Copyright 2002, 2003 Free Software Foundation, Inc. 3 Contributed by Damjan Lampret (lampret@opencores.org). 4 5 This file is part of or1k_gen_isa, or1ksim, GDB and GAS. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 20 21/* We treat all letters the same in encode/decode routines so 22 we need to assign some characteristics to them like signess etc. */ 23 24#ifndef OR32_H_ISA 25#define OR32_H_ISA 26 27#define NUM_UNSIGNED (0) 28#define NUM_SIGNED (1) 29 30#define MAX_GPRS 32 31#define PAGE_SIZE 4096 32#undef __HALF_WORD_INSN__ 33 34#define OPERAND_DELIM (',') 35 36#define OR32_IF_DELAY (1) 37#define OR32_W_FLAG (2) 38#define OR32_R_FLAG (4) 39 40struct or32_letter 41{ 42 char letter; 43 int sign; 44 /* int reloc; relocation per letter ?? */ 45}; 46 47/* Main instruction specification array. */ 48struct or32_opcode 49{ 50 /* Name of the instruction. */ 51 char *name; 52 53 /* A string of characters which describe the operands. 54 Valid characters are: 55 ,() Itself. Characters appears in the assembly code. 56 rA Register operand. 57 rB Register operand. 58 rD Register operand. 59 I An immediate operand, range -32768 to 32767. 60 J An immediate operand, range . (unused) 61 K An immediate operand, range 0 to 65535. 62 L An immediate operand, range 0 to 63. 63 M An immediate operand, range . (unused) 64 N An immediate operand, range -33554432 to 33554431. 65 O An immediate operand, range . (unused). */ 66 char *args; 67 68 /* Opcode and operand encoding. */ 69 char *encoding; 70 void (*exec) (void); 71 unsigned int flags; 72}; 73 74#define OPTYPE_LAST (0x80000000) 75#define OPTYPE_OP (0x40000000) 76#define OPTYPE_REG (0x20000000) 77#define OPTYPE_SIG (0x10000000) 78#define OPTYPE_DIS (0x08000000) 79#define OPTYPE_DST (0x04000000) 80#define OPTYPE_SBIT (0x00001F00) 81#define OPTYPE_SHR (0x0000001F) 82#define OPTYPE_SBIT_SHR (8) 83 84/* MM: Data how to decode operands. */ 85extern struct insn_op_struct 86{ 87 unsigned long type; 88 unsigned long data; 89} **op_start; 90 91#ifdef HAS_EXECUTION 92extern void l_invalid (void); 93extern void l_sfne (void); 94extern void l_bf (void); 95extern void l_add (void); 96extern void l_sw (void); 97extern void l_sb (void); 98extern void l_sh (void); 99extern void l_lwz (void); 100extern void l_lbs (void); 101extern void l_lbz (void); 102extern void l_lhs (void); 103extern void l_lhz (void); 104extern void l_movhi (void); 105extern void l_and (void); 106extern void l_or (void); 107extern void l_xor (void); 108extern void l_sub (void); 109extern void l_mul (void); 110extern void l_div (void); 111extern void l_divu (void); 112extern void l_sll (void); 113extern void l_sra (void); 114extern void l_srl (void); 115extern void l_j (void); 116extern void l_jal (void); 117extern void l_jalr (void); 118extern void l_jr (void); 119extern void l_rfe (void); 120extern void l_nop (void); 121extern void l_bnf (void); 122extern void l_sfeq (void); 123extern void l_sfgts (void); 124extern void l_sfges (void); 125extern void l_sflts (void); 126extern void l_sfles (void); 127extern void l_sfgtu (void); 128extern void l_sfgeu (void); 129extern void l_sfltu (void); 130extern void l_sfleu (void); 131extern void l_mtspr (void); 132extern void l_mfspr (void); 133extern void l_sys (void); 134extern void l_trap (void); /* CZ 21/06/01. */ 135extern void l_macrc (void); 136extern void l_mac (void); 137extern void l_msb (void); 138extern void l_invalid (void); 139extern void l_cust1 (void); 140extern void l_cust2 (void); 141extern void l_cust3 (void); 142extern void l_cust4 (void); 143#endif 144extern void l_none (void); 145 146extern const struct or32_letter or32_letters[]; 147 148extern const struct or32_opcode or32_opcodes[]; 149 150extern const unsigned int or32_num_opcodes; 151 152/* Calculates instruction length in bytes. Always 4 for OR32. */ 153extern int insn_len (int); 154 155/* Is individual insn's operand signed or unsigned? */ 156extern int letter_signed (char); 157 158/* Number of letters in the individual lettered operand. */ 159extern int letter_range (char); 160 161/* MM: Returns index of given instruction name. */ 162extern int insn_index (char *); 163 164/* MM: Returns instruction name from index. */ 165extern const char *insn_name (int); 166 167/* MM: Constructs new FSM, based on or32_opcodes. */ 168extern void build_automata (void); 169 170/* MM: Destructs FSM. */ 171extern void destruct_automata (void); 172 173/* MM: Decodes instruction using FSM. Call build_automata first. */ 174extern int insn_decode (unsigned int); 175 176/* Disassemble one instruction from insn to disassemble. 177 Return the size of the instruction. */ 178int disassemble_insn (unsigned long); 179 180#endif 181