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annotate jagcpu_x86.c @ 1587:ea687ca7d845

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Fix missing include in bindings.c
author Michael Pavone <pavone@retrodev.com>
date Tue, 19 Jun 2018 23:47:36 -0700
parents c1e78a101912
children 137dbd05ceab
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1 #include <stdint.h>
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2 #include "backend.h"
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3 #include "jagcpu.h"
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4 #include "gen_x86.h"
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5
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6 void jag_check_resultwrite(jag_cpu_options *opts, uint8_t src, uint8_t dst)
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7 {
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8 code_info *code = &opts->gen.code;
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9 cmp_ir(code, JAGCPU_NOREG, opts->resultreg, SZ_B);
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10 code_ptr no_result = code->cur + 1;
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11 jcc(code, CC_Z, no_result + 1);
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12 //save result to current bank
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13 movzx_rr(code, opts->resultreg, opts->scratch1, SZ_B, SZ_D);
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14 mov_rrindex(code, opts->result, opts->bankptr, opts->scratch1, 4, SZ_D);
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15
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16 code_ptr writeback_penatly;
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17 if (dst == src) {
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18 //unclear if src and dst read can share a port if it's the same register
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19 //assume that is the case for now
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20 writeback_penalty = NULL;
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21 } else {
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22 cmp_ir(code, JAGCPU_NOREG, opts->writeback, SZ_B);
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23 code_ptr no_writeback_penalty = code->cur + 1;
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24 jcc(code, CC_Z, no_writeback_penalty + 1);
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25 cmp_ir(code, src, opts->writeback, SZ_B);
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26 code_ptr no_writeback_penalty2 = code->cur + 1;
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27 jcc(code, CC_Z, no_writeback_penalty2 + 1);
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28 cmp_ir(code, dst, opts->writeback, SZ_B);
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29 writeback_penalty = code->cur + 1;
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30 jcc(code, CC_NZ, writeback_penalty + 1);
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31 *no_writeback_penalty = code->cur - (no_writeback_penalty + 1);
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32 *no_writeback_penalty2 = code->cur - (no_writeback_penalty2 + 1);
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33 }
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34 cmp_ir(code, src, opts->resultreg, SZ_B);
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35 code_ptr no_result_penalty;
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36 if (dst == src) {
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37 no_result_penalty = code->cur+1;
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38 jcc(code, CC_NZ, no_result_penalty+1);
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39 } else {
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40 code_ptr result_penalty = code->cur + 1;
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41 jcc(code, CC_Z, result_penalty+1);
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42 cmp_ir(code, dst, opts->resultreg, SZ_B);
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43 no_result_penalty = code->cur+1;
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44 jcc(code, CC_NZ, no_result_penalty+1);
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45 *result_penalty = code->cur - (result_penalty + 1);
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46 }
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47 code_ptr penalty = code->cur;
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48 cycles(code, 1);
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49 *no_result_penalty = code->cur - (no_result_penalty + 1);
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50 code_ptr end = code->cur + 1;
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51 jmp(end + 1);
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52 //No result to save, but there could still be a writeback, source read conflict
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53 code_ptr end2 = NULL;
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54
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55 cmp_ir(code, JAGCPU_NOREG, opts->writeback, SZ_B);
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56 code_ptr no_resultreg_move = code->cur + 1;
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57 jcc(code, CC_Z, no_resultreg_move+1);
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58
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59 if (src != dst) {
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60 //unclear if src and dst read can share a port if it's the same register
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61 //assume that is the case for now
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62 cmp_ir(code, src, opts->writeback, SZ_B);
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63 end2 = code->cur + 1;
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64 jcc(code, CC_Z, end2+1);
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65 cmp_ir(code, src, opts->writeback, SZ_B);
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66 jcc(code, CC_NZ, penalty)
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67 }
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68 *end = code->cur - (end + 1);
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69 if (end2) {
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70 *end2 = code->cur - (end2 + 1);
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71 }
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72 *no_result = code->cur - (no_result + 1);
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73 mov_rr(code, opts->resultreg, opts->writeback, SZ_B);
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74 *no_resultreg_move = code->cur - (no_resultreg_move + 1);
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75 }
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76
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77 void jag_check_resultwrite_noread(jag_cpu_options *opts)
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78 {
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79 code_info *code = &opts->gen.code;
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80 cmp_ir(code, JAGCPU_NOREG, opts->resultreg, SZ_B);
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81 code_ptr no_result = code->cur + 1;
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82 jcc(code, CC_Z, no_result + 1);
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83 //save result to current bank
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84 movzx_rr(code, opts->resultreg, opts->scratch1, SZ_B, SZ_D);
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85 mov_rrindex(code, opts->result, opts->bankptr, opts->scratch1, 4, SZ_D);
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86 *no_result = code->cur - (no_result + 1);
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87 mov_rr(code, opts->resultreg, opts->writeback, SZ_B);
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88 }
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89
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90 void jag_check_resultwrite_singleread(jag_cpu options *opts, uint8_t reg)
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91 {
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92 code_info *code = &opts->gen.code;
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93 cmp_ir(code, JAGCPU_NOREG, opts->resultreg, SZ_B);
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94 code_ptr no_result = code->cur + 1;
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95 jcc(code, CC_Z, no_result + 1);
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96 //save result to current bank
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97 movzx_rr(code, opts->resultreg, opts->scratch1, SZ_B, SZ_D);
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98 mov_rrindex(code, opts->result, opts->bankptr, opts->scratch1, 4, SZ_D);
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99
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100 //check for a scoreboard delay
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101 cmp_ir(code, reg, opts->resultreg, SZ_B);
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102 code_ptr no_delay = code-.cur + 1;
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103 jcc(code, CC_NZ, no_delay + 1);
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104 ccylces(code, 1);
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105 *no_delay = code->cur - (no_delay = 1);
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106 *no_result = code->cur - (no_result + 1);
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107 mov_rr(code, opts->resultreg, opts->writeback, SZ_B);
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108 }
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109
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110 void translate_jag_quickimmed(jag_cpu_options *opts, uint32_t address, uint16_t opcode, uint32_t value, uint16_t dest)
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111 {
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112 jag_check_resultwrite_singleread(opts, dest);
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113 switch (opcode)
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114 {
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115 case ADDQ:
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116 break;
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117 case ADDQT:
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118 break;
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119 }
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120 }
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121
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122
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123 uint16_t *translate_jag_inst(uint16_t *stream, jag_cpu_options *opts, uint32_t address)
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124 {
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125 uint16_t inst = *stream
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126 ++stream;
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127 uint16_t opcode = jag_opcode(inst, opts->is_gpu);
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128 check_cycles_int(&opts->gen, address);
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129 code_info *code = &opts->gen.code;
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130 switch (opcode)
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131 {
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132 case JAG_MOVEI: {
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133 uint32_t value = *stream;
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134 ++stream;
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135 value |= *stream << 16;
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136 ++stream;
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137
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138 jag_check_resultwrite_noread(opts);
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139 mov_ir(code, value, opts->result, SZ_D);
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140 mov_ir(code, jag_reg2(inst), opts->resultreg, SZ_B);
c1e78a101912 WIP Jaguar GPU/DSP emulation
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141 break;
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
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142 }
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
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143 case JAG_MOVE: {
c1e78a101912 WIP Jaguar GPU/DSP emulation
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144 uint8_t src = jag_reg1(inst), dst = jag_reg2(inst);
c1e78a101912 WIP Jaguar GPU/DSP emulation
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145 jag_check_resultwrite_singleread(opts, src);
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146 //move has a shorter pipeline than normal instructions
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diff changeset
147 if (src != dst) {
c1e78a101912 WIP Jaguar GPU/DSP emulation
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148 mov_rdispr(code, opts->bankptr, src * 4, opts->gen.scratch1, SZ_D);
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149 mov_rrdisp(code, opts->gen.scratch1, opts->bankptr, dst * 4, SZ_D);
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150 }
c1e78a101912 WIP Jaguar GPU/DSP emulation
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diff changeset
151 mov_ir(code, dst, opts->writeback, SZ_B);
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parents:
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152 mov_ir(code, JAGCPU_NOREG, opts->resultreg, SZ_B);
c1e78a101912 WIP Jaguar GPU/DSP emulation
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153 break;
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
154 }
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
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diff changeset
155 case JAG_MOVEQ: {
c1e78a101912 WIP Jaguar GPU/DSP emulation
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156 uint8_t dst = jag_reg2(inst);
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157 jag_check_resultwrite_noread(opts);
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158 //moveq has a shorter pipeline than normal instructions
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diff changeset
159 mov_irdisp(code, jag_quick(inst), opts->bankptr, dst * 4, SZ_D);
c1e78a101912 WIP Jaguar GPU/DSP emulation
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diff changeset
160 mov_ir(code, dst, opts->writeback, SZ_B);
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parents:
diff changeset
161 mov_ir(code, JAGCPU_NOREG, opts->resultreg, SZ_B);
c1e78a101912 WIP Jaguar GPU/DSP emulation
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parents:
diff changeset
162 }
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
163 break;
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
164 case JAG_JR: {
c1e78a101912 WIP Jaguar GPU/DSP emulation
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parents:
diff changeset
165 jag_check_resultwrite_noread(opts);
c1e78a101912 WIP Jaguar GPU/DSP emulation
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parents:
diff changeset
166 //TODO: Pipeline stalls on flag readiness
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diff changeset
167 uint16_t cond = jag_reg2(inst);
c1e78a101912 WIP Jaguar GPU/DSP emulation
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diff changeset
168 if (jag_is_always_false(cond)) {
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
169 } else {
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
170 int32_t offset = jag_quick(inst);
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
171 if (offset & 0x10) {
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
172 offset = -16 + (offset & 0xF);
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
173 }
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
174 }
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
175
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
176 }
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
177 break;
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
178 default:
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
179 if (is_quick_1_32_opcode(opcode, opts->is_gpu)) {
c1e78a101912 WIP Jaguar GPU/DSP emulation
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parents:
diff changeset
180 translate_jag_quickimmed(opts, address, jag_quick(inst), jag_reg2(inst));
c1e78a101912 WIP Jaguar GPU/DSP emulation
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parents:
diff changeset
181 } else if (is_quick_0_31_opcode(opcode)) {
c1e78a101912 WIP Jaguar GPU/DSP emulation
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parents:
diff changeset
182 translate_jag_quickimmed(opts, address, jag_reg1(inst), jag_reg2(inst));
c1e78a101912 WIP Jaguar GPU/DSP emulation
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parents:
diff changeset
183 } else if (is_single_source(opcode, opts->is_gpu)) {
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
184 translate_jag_single_source(opts, address, jag_reg2(isnt));
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
185 } else {
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
186 translate_jag_normal(opts, address, jag_reg1(inst), jag_reg2(inst));
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
187 }
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
188 }
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
189 return stream;
c1e78a101912 WIP Jaguar GPU/DSP emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
190 }