1 | /* Table of opcodes for the OpenRISC 1000 ISA. |
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2 | Copyright 2002, 2003, 2010 Free Software Foundation, Inc. |
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3 | Contributed by Damjan Lampret (lampret@opencores.org). |
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4 | |
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5 | This file is part of or1k_gen_isa, or1ksim, GDB and GAS. |
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6 | |
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7 | This program is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation; either version 3 of the License, or |
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10 | (at your option) any later version. |
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11 | |
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12 | This program is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | GNU General Public License for more details. |
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16 | |
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17 | You should have received a copy of the GNU General Public License |
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18 | along with this program; if not, write to the Free Software |
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19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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20 | MA 02110-1301, USA. */ |
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21 | |
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22 | /* We treat all letters the same in encode/decode routines so |
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23 | we need to assign some characteristics to them like signess etc. */ |
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24 | |
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25 | #ifndef OR32_H_ISA |
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26 | #define OR32_H_ISA |
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27 | |
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28 | #define NUM_UNSIGNED (0) |
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29 | #define NUM_SIGNED (1) |
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30 | |
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31 | #define MAX_GPRS 32 |
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32 | #define PAGE_SIZE 4096 |
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33 | #undef __HALF_WORD_INSN__ |
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34 | |
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35 | #define OPERAND_DELIM (',') |
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36 | |
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37 | #define OR32_IF_DELAY (1) |
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38 | #define OR32_W_FLAG (2) |
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39 | #define OR32_R_FLAG (4) |
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40 | |
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41 | struct or32_letter |
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42 | { |
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43 | char letter; |
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44 | int sign; |
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45 | /* int reloc; relocation per letter ?? */ |
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46 | }; |
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47 | |
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48 | /* Main instruction specification array. */ |
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49 | struct or32_opcode |
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50 | { |
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51 | /* Name of the instruction. */ |
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52 | char *name; |
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53 | |
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54 | /* A string of characters which describe the operands. |
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55 | Valid characters are: |
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56 | ,() Itself. Characters appears in the assembly code. |
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57 | rA Register operand. |
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58 | rB Register operand. |
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59 | rD Register operand. |
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60 | I An immediate operand, range -32768 to 32767. |
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61 | J An immediate operand, range . (unused) |
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62 | K An immediate operand, range 0 to 65535. |
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63 | L An immediate operand, range 0 to 63. |
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64 | M An immediate operand, range . (unused) |
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65 | N An immediate operand, range -33554432 to 33554431. |
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66 | O An immediate operand, range . (unused). */ |
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67 | char *args; |
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68 | |
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69 | /* Opcode and operand encoding. */ |
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70 | char *encoding; |
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71 | void (*exec) (void); |
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72 | unsigned int flags; |
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73 | }; |
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74 | |
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75 | #define OPTYPE_LAST (0x80000000) |
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76 | #define OPTYPE_OP (0x40000000) |
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77 | #define OPTYPE_REG (0x20000000) |
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78 | #define OPTYPE_SIG (0x10000000) |
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79 | #define OPTYPE_DIS (0x08000000) |
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80 | #define OPTYPE_DST (0x04000000) |
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81 | #define OPTYPE_SBIT (0x00001F00) |
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82 | #define OPTYPE_SHR (0x0000001F) |
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83 | #define OPTYPE_SBIT_SHR (8) |
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84 | |
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85 | /* MM: Data how to decode operands. */ |
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86 | extern struct insn_op_struct |
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87 | { |
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88 | unsigned long type; |
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89 | unsigned long data; |
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90 | } **op_start; |
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91 | |
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92 | #ifdef HAS_EXECUTION |
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93 | extern void l_invalid (void); |
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94 | extern void l_sfne (void); |
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95 | extern void l_bf (void); |
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96 | extern void l_add (void); |
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97 | extern void l_sw (void); |
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98 | extern void l_sb (void); |
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99 | extern void l_sh (void); |
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100 | extern void l_lwz (void); |
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101 | extern void l_lbs (void); |
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102 | extern void l_lbz (void); |
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103 | extern void l_lhs (void); |
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104 | extern void l_lhz (void); |
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105 | extern void l_movhi (void); |
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106 | extern void l_and (void); |
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107 | extern void l_or (void); |
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108 | extern void l_xor (void); |
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109 | extern void l_sub (void); |
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110 | extern void l_mul (void); |
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111 | extern void l_div (void); |
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112 | extern void l_divu (void); |
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113 | extern void l_sll (void); |
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114 | extern void l_sra (void); |
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115 | extern void l_srl (void); |
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116 | extern void l_j (void); |
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117 | extern void l_jal (void); |
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118 | extern void l_jalr (void); |
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119 | extern void l_jr (void); |
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120 | extern void l_rfe (void); |
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121 | extern void l_nop (void); |
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122 | extern void l_bnf (void); |
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123 | extern void l_sfeq (void); |
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124 | extern void l_sfgts (void); |
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125 | extern void l_sfges (void); |
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126 | extern void l_sflts (void); |
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127 | extern void l_sfles (void); |
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128 | extern void l_sfgtu (void); |
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129 | extern void l_sfgeu (void); |
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130 | extern void l_sfltu (void); |
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131 | extern void l_sfleu (void); |
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132 | extern void l_mtspr (void); |
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133 | extern void l_mfspr (void); |
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134 | extern void l_sys (void); |
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135 | extern void l_trap (void); /* CZ 21/06/01. */ |
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136 | extern void l_macrc (void); |
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137 | extern void l_mac (void); |
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138 | extern void l_msb (void); |
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139 | extern void l_invalid (void); |
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140 | extern void l_cust1 (void); |
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141 | extern void l_cust2 (void); |
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142 | extern void l_cust3 (void); |
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143 | extern void l_cust4 (void); |
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144 | #endif |
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145 | extern void l_none (void); |
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146 | |
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147 | extern const struct or32_letter or32_letters[]; |
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148 | |
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149 | extern const struct or32_opcode or32_opcodes[]; |
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150 | |
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151 | extern const unsigned int or32_num_opcodes; |
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152 | |
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153 | /* Calculates instruction length in bytes. Always 4 for OR32. */ |
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154 | extern int insn_len (int); |
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155 | |
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156 | /* Is individual insn's operand signed or unsigned? */ |
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157 | extern int letter_signed (char); |
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158 | |
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159 | /* Number of letters in the individual lettered operand. */ |
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160 | extern int letter_range (char); |
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161 | |
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162 | /* MM: Returns index of given instruction name. */ |
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163 | extern int insn_index (char *); |
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164 | |
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165 | /* MM: Returns instruction name from index. */ |
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166 | extern const char *insn_name (int); |
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167 | |
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168 | /* MM: Constructs new FSM, based on or32_opcodes. */ |
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169 | extern void build_automata (void); |
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170 | |
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171 | /* MM: Destructs FSM. */ |
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172 | extern void destruct_automata (void); |
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173 | |
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174 | /* MM: Decodes instruction using FSM. Call build_automata first. */ |
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175 | extern int insn_decode (unsigned int); |
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176 | |
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177 | /* Disassemble one instruction from insn to disassemble. |
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178 | Return the size of the instruction. */ |
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179 | int disassemble_insn (unsigned long); |
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180 | |
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181 | #endif |
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