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comparison gen_x86.c @ 1216:0649cd8ca097

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Cycle accurate MULU/MULS emulation
author Michael Pavone <pavone@retrodev.com>
date Sat, 04 Feb 2017 00:41:15 -0800
parents 2ec5e6eaf81d
children d5a47597b61f
comparison
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1215:cf69a179aeaf 1216:0649cd8ca097
29 #define PRE_REX 0x40 29 #define PRE_REX 0x40
30 #define OP_PUSH 0x50 30 #define OP_PUSH 0x50
31 #define OP_POP 0x58 31 #define OP_POP 0x58
32 #define OP_MOVSXD 0x63 32 #define OP_MOVSXD 0x63
33 #define PRE_SIZE 0x66 33 #define PRE_SIZE 0x66
34 #define OP_IMUL 0x69
34 #define OP_JCC 0x70 35 #define OP_JCC 0x70
35 #define OP_IMMED_ARITH 0x80 36 #define OP_IMMED_ARITH 0x80
36 #define OP_TEST 0x84 37 #define OP_TEST 0x84
37 #define OP_XCHG 0x86 38 #define OP_XCHG 0x86
38 #define OP_MOV 0x88 39 #define OP_MOV 0x88
528 opcode |= BIT_DIR; 529 opcode |= BIT_DIR;
529 } 530 }
530 if (size == SZ_W) { 531 if (size == SZ_W) {
531 *(out++) = PRE_SIZE; 532 *(out++) = PRE_SIZE;
532 } 533 }
533 if (dst == RAX && !sign_extend) { 534 if (dst == RAX && !sign_extend && al_opcode) {
534 if (size != SZ_B) { 535 if (size != SZ_B) {
535 al_opcode |= BIT_SIZE; 536 al_opcode |= BIT_SIZE;
536 if (size == SZ_Q) { 537 if (size == SZ_Q) {
537 #ifdef X86_64 538 #ifdef X86_64
538 *out = PRE_REX | REX_QUAD; 539 *out = PRE_REX | REX_QUAD;
1142 } 1143 }
1143 1144
1144 void imul_rdispr(code_info *code, uint8_t src_base, int32_t disp, uint8_t dst, uint8_t size) 1145 void imul_rdispr(code_info *code, uint8_t src_base, int32_t disp, uint8_t dst, uint8_t size)
1145 { 1146 {
1146 x86_rrdisp_sizedir(code, OP2_IMUL | (PRE_2BYTE << 8), dst, src_base, disp, size, 0); 1147 x86_rrdisp_sizedir(code, OP2_IMUL | (PRE_2BYTE << 8), dst, src_base, disp, size, 0);
1148 }
1149
1150 void imul_irr(code_info *code, int32_t val, uint8_t src, uint8_t dst, uint8_t size)
1151 {
1152 if (size == SZ_B) {
1153 fatal_error("imul immediate only supports 16-bit sizes and up");
1154 }
1155
1156 x86_ir(code, OP_IMUL, dst, 0, val, src, size);
1147 } 1157 }
1148 1158
1149 void not_r(code_info *code, uint8_t dst, uint8_t size) 1159 void not_r(code_info *code, uint8_t dst, uint8_t size)
1150 { 1160 {
1151 x86_r_size(code, OP_NOT_NEG, OP_EX_NOT, dst, size); 1161 x86_r_size(code, OP_NOT_NEG, OP_EX_NOT, dst, size);