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annotate 68kinst.h @ 613:09d5adf8d1ca

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Fix opsize for sbcd in 68K instruction decoder. This fixes the timer bug in Strider 2
author Michael Pavone <pavone@retrodev.com>
date Sun, 28 Dec 2014 17:58:43 -0800
parents 775802dab98f
children 47123183c336
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rev   line source
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1 /*
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2 Copyright 2013 Michael Pavone
518
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
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6 #ifndef M68KINST_H_
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7 #define M68KINST_H_
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8
0
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9 #include <stdint.h>
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10
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11 typedef enum {
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12 BIT_MOVEP_IMMED = 0,
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13 MOVE_BYTE,
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14 MOVE_LONG,
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15 MOVE_WORD,
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16 MISC,
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17 QUICK_ARITH_LOOP,
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18 BRANCH,
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19 MOVEQ,
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20 OR_DIV_SBCD,
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21 SUB_SUBX,
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22 RESERVED,
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23 CMP_XOR,
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24 AND_MUL_ABCD_EXG,
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25 ADD_ADDX,
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26 SHIFT_ROTATE,
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27 COPROC
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28 } m68k_optypes;
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29
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30 typedef enum {
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31 M68K_ABCD,
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32 M68K_ADD,
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33 M68K_ADDX,
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34 M68K_AND,
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35 M68K_ANDI_CCR,
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36 M68K_ANDI_SR,
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37 M68K_ASL,
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38 M68K_ASR,
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39 M68K_BCC,
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40 M68K_BCHG,
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41 M68K_BCLR,
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42 M68K_BSET,
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43 M68K_BSR,
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44 M68K_BTST,
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45 M68K_CHK,
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46 M68K_CLR,
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47 M68K_CMP,
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48 M68K_DBCC,
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49 M68K_DIVS,
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50 M68K_DIVU,
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51 M68K_EOR,
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52 M68K_EORI_CCR,
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53 M68K_EORI_SR,
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54 M68K_EXG,
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55 M68K_EXT,
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56 M68K_ILLEGAL,
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57 M68K_JMP,
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58 M68K_JSR,
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59 M68K_LEA,
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60 M68K_LINK,
0
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61 M68K_LSL,
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62 M68K_LSR,
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63 M68K_MOVE,
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64 M68K_MOVE_CCR,
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65 M68K_MOVE_FROM_SR,
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66 M68K_MOVE_SR,
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67 M68K_MOVE_USP,
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68 M68K_MOVEM,
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69 M68K_MOVEP,
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70 M68K_MULS,
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71 M68K_MULU,
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72 M68K_NBCD,
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73 M68K_NEG,
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74 M68K_NEGX,
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75 M68K_NOP,
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76 M68K_NOT,
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77 M68K_OR,
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78 M68K_ORI_CCR,
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79 M68K_ORI_SR,
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80 M68K_PEA,
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81 M68K_RESET,
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82 M68K_ROL,
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83 M68K_ROR,
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84 M68K_ROXL,
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85 M68K_ROXR,
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86 M68K_RTE,
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87 M68K_RTR,
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88 M68K_RTS,
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89 M68K_SBCD,
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90 M68K_SCC,
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91 M68K_STOP,
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92 M68K_SUB,
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93 M68K_SUBX,
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94 M68K_SWAP,
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95 M68K_TAS,
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96 M68K_TRAP,
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97 M68K_TRAPV,
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98 M68K_TST,
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99 M68K_UNLK,
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100 M68K_INVALID
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101 } m68K_op;
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102
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103 typedef enum {
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104 VAR_NORMAL,
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105 VAR_QUICK,
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106 VAR_IMMEDIATE,
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107 VAR_BYTE,
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108 VAR_WORD,
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109 VAR_LONG
0
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110 } m68K_variant;
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111
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112 typedef enum {
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113 OPSIZE_BYTE=0,
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114 OPSIZE_WORD,
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115 OPSIZE_LONG,
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116 OPSIZE_INVALID,
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117 OPSIZE_UNSIZED
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118 } m68K_opsizes;
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119
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120 typedef enum {
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121 //actual addressing mode field values
0
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122 MODE_REG = 0,
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123 MODE_AREG,
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124 MODE_AREG_INDIRECT,
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125 MODE_AREG_POSTINC,
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126 MODE_AREG_PREDEC,
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127 MODE_AREG_DISPLACE,
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128 MODE_AREG_INDEX_MEM, //bunch of relatively complicated modes
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129 MODE_PC_INDIRECT_ABS_IMMED, //Modes that use the program counter, an absolute address or immediate value
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130 //expanded values
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131 MODE_AREG_INDEX_DISP8,
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132 #ifdef M68020
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133 MODE_AREG_INDEX_DISP32,
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134 #endif
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135 MODE_ABSOLUTE_SHORT,
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136 MODE_ABSOLUTE,
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137 MODE_PC_DISPLACE,
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138 MODE_PC_INDEX_DISP8,
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139 #ifdef M68020
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140 MODE_PC_INDEX_DISP32,
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141 #endif
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142 MODE_IMMEDIATE,
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143 MODE_IMMEDIATE_WORD,//used to indicate an immediate operand that only uses a single extension word even for a long operation
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144 MODE_UNUSED
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145 } m68k_addr_modes;
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146
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147 typedef enum {
2
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148 COND_TRUE,
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149 COND_FALSE,
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150 COND_HIGH,
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151 COND_LOW_SAME,
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152 COND_CARRY_CLR,
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153 COND_CARRY_SET,
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154 COND_NOT_EQ,
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155 COND_EQ,
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156 COND_OVERF_CLR,
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157 COND_OVERF_SET,
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158 COND_PLUS,
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159 COND_MINUS,
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160 COND_GREATER_EQ,
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161 COND_LESS,
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162 COND_GREATER,
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163 COND_LESS_EQ
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164 } m68K_condition;
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165
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166 typedef struct {
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167 uint8_t addr_mode;
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168 union {
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169 struct {
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170 uint8_t pri;
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171 uint8_t sec;
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172 int32_t displacement;
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173 } regs;
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174 uint32_t immed;
0
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175 } params;
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176 } m68k_op_info;
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177
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178 typedef struct m68kinst {
0
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179 uint8_t op;
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180 uint8_t variant;
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181 union {
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182 uint8_t size;
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183 uint8_t cond;
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184 } extra;
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185 uint32_t address;
0
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186 m68k_op_info src;
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187 m68k_op_info dst;
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188 } m68kinst;
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189
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190 typedef enum {
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191 VECTOR_RESET_STACK,
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192 VECTOR_RESET_PC,
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193 VECTOR_ACCESS_FAULT,
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194 VECTOR_ADDRESS_ERROR,
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195 VECTOR_ILLEGAL_INST,
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196 VECTOR_INT_DIV_ZERO,
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197 VECTOR_CHK,
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198 VECTOR_TRAPV,
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199 VECTOR_PRIV_VIOLATION,
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200 VECTOR_TRACE,
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201 VECTOR_LINE_1010,
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202 VECTOR_LINE_1111,
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203 VECTOR_COPROC_VIOLATION=13,
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204 VECTOR_FORMAT_ERROR,
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205 VECTOR_UNINIT_INTERRUPT,
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206 VECTOR_SPURIOUS_INTERRUPT=24,
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207 VECTOR_INT_1,
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208 VECTOR_INT_2,
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209 VECTOR_INT_3,
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210 VECTOR_INT_4,
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211 VECTOR_INT_5,
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212 VECTOR_INT_6,
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213 VECTOR_INT_7,
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214 VECTOR_TRAP_0,
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215 VECTOR_TRAP_1,
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216 VECTOR_TRAP_2,
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217 VECTOR_TRAP_3,
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218 VECTOR_TRAP_4,
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219 VECTOR_TRAP_5,
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220 VECTOR_TRAP_6,
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221 VECTOR_TRAP_7,
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222 VECTOR_TRAP_8,
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223 VECTOR_TRAP_9,
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224 VECTOR_TRAP_10,
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225 VECTOR_TRAP_11,
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226 VECTOR_TRAP_12,
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227 VECTOR_TRAP_13,
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228 VECTOR_TRAP_14,
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229 VECTOR_TRAP_15
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230 } m68k_vector;
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231
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232 uint16_t * m68k_decode(uint16_t * istream, m68kinst * dst, uint32_t address);
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233 uint32_t m68k_branch_target(m68kinst * inst, uint32_t *dregs, uint32_t *aregs);
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234 uint8_t m68k_is_branch(m68kinst * inst);
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235 uint8_t m68k_is_noncall_branch(m68kinst * inst);
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236 int m68k_disasm(m68kinst * decoded, char * dst);
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237 int m68k_disasm_labels(m68kinst * decoded, char * dst);
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238
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239 #endif
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240