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Fixing up FPU opcodes further

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dingusdev 2020-01-11 21:17:29 -07:00
parent ea7c34f0d9
commit fbe82010f8
1 changed files with 32 additions and 8 deletions
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40
cpu/ppc/ppcfpopcodes.cpp
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@ -126,7 +126,7 @@ void ppc_divbyzero(uint64_t input_a, uint64_t input_b, bool is_single){
} }
void ppc_confirm_inf_nan(uint64_t input_a, uint64_t input_b, bool is_single, uint32_t op){ bool ppc_confirm_inf_nan(uint64_t input_a, uint64_t input_b, bool is_single, uint32_t op){
if (is_single){ if (is_single){
uint32_t exp_a = (input_a >> 23) & 0xff; uint32_t exp_a = (input_a >> 23) & 0xff;
uint32_t exp_b = (input_b >> 23) & 0xff; uint32_t exp_b = (input_b >> 23) & 0xff;
@ -137,19 +137,30 @@ void ppc_confirm_inf_nan(uint64_t input_a, uint64_t input_b, bool is_single, uin
case 36: case 36:
if ((exp_a == 0xff) & (exp_b == 0xff)){ if ((exp_a == 0xff) & (exp_b == 0xff)){
ppc_state.ppc_fpscr |= 0x80400000; ppc_state.ppc_fpscr |= 0x80400000;
return true;
} }
else if ((input_a == 0) & (input_b == 0)){ else if ((input_a == 0) & (input_b == 0)){
ppc_state.ppc_fpscr |= 0x80200000; ppc_state.ppc_fpscr |= 0x80200000;
return true;
} }
break; break;
case 40: case 40:
if ((exp_a == 0xff) & (exp_b == 0xff)){ if ((exp_a == 0xff) & (exp_b == 0xff)){
ppc_state.ppc_fpscr |= 0x80800000; ppc_state.ppc_fpscr |= 0x80800000;
return true;
} }
break; break;
case 50: case 50:
if (((exp_a == 0xff) & (input_b == 0)) | ((exp_b == 0xff) & (input_a == 0))){ if (((exp_a == 0xff) & (input_b == 0)) | ((exp_b == 0xff) & (input_a == 0))){
ppc_state.ppc_fpscr |= 0x80100000; ppc_state.ppc_fpscr |= 0x80100000;
return true;
}
break;
case 56:
case 58:
if ((exp_a == 0xff) & (exp_b == 0xff)) {
ppc_state.ppc_fpscr |= 0x80800000;
return true;
} }
break; break;
} }
@ -164,19 +175,30 @@ void ppc_confirm_inf_nan(uint64_t input_a, uint64_t input_b, bool is_single, uin
case 36: case 36:
if ((exp_a == 0x7ff) & (exp_b == 0x7ff)){ if ((exp_a == 0x7ff) & (exp_b == 0x7ff)){
ppc_state.ppc_fpscr |= 0x80400000; ppc_state.ppc_fpscr |= 0x80400000;
return true;
} }
else if ((input_a == 0) & (input_b == 0)){ else if ((input_a == 0) & (input_b == 0)){
ppc_state.ppc_fpscr |= 0x80200000; ppc_state.ppc_fpscr |= 0x80200000;
return true;
} }
break; break;
case 40: case 40:
if ((exp_a == 0x7ff) & (exp_b == 0x7ff)){ if ((exp_a == 0x7ff) & (exp_b == 0x7ff)){
ppc_state.ppc_fpscr |= 0x80800000; ppc_state.ppc_fpscr |= 0x80800000;
return true;
} }
break; break;
case 50: case 50:
if (((exp_a == 0x7ff) & (input_b == 0)) | ((exp_b == 0x7ff) & (input_a == 0))){ if (((exp_a == 0x7ff) & (input_b == 0)) | ((exp_b == 0x7ff) & (input_a == 0))){
ppc_state.ppc_fpscr |= 0x80100000; ppc_state.ppc_fpscr |= 0x80100000;
return true;
}
break;
case 56:
case 58:
if ((exp_a == 0xff) & (exp_b == 0xff)) {
ppc_state.ppc_fpscr |= 0x80800000;
return true;
} }
break; break;
} }
@ -216,16 +238,18 @@ void ppc_changecrf1(){
} }
//Floating Point Arithmetic //Floating Point Arithmetic
void ppc_fadd(){ void ppc_fadd() {
ppc_grab_regsfpdab(); ppc_grab_regsfpdab();
double testd1 = (double)ppc_result64_a; double testd1 = (double)ppc_result64_a;
double testd2 = (double)ppc_result64_b; double testd2 = (double)ppc_result64_b;
double testd3 = testd1 + testd2; if (!ppc_confirm_inf_nan(ppc_result64_a, ppc_result64_b, false, 58)) {
double testd3 = testd1 + testd2;
uint64_t *pre_final = (uint64_t *)&testd3; uint64_t* pre_final = (uint64_t*)&testd3;
ppc_result64_d = *pre_final; ppc_result64_d = *pre_final;
ppc_store_dfpresult(); ppc_store_dfpresult();
}
} }
void ppc_fadddot(){ void ppc_fadddot(){
@ -1070,8 +1094,8 @@ void ppc_mtfsf(){
} }
void ppc_mtfsfdot(){ void ppc_mtfsfdot(){
uint32_t quickfprval = (ppc_cur_instruction >> 12) & 15; reg_b = (ppc_cur_instruction >> 11) & 31;
ppc_result_d = (ppc_cur_instruction >> 23) & 7; uint32_t fm_mask = (ppc_cur_instruction >> 17) & 255;
crm = ((fm_mask & 1) == 1)? 0xF0000000 : 0x00000000; crm = ((fm_mask & 1) == 1)? 0xF0000000 : 0x00000000;
crm += (((fm_mask >> 1) & 1) == 1)? 0x0F000000 : 0x00000000; crm += (((fm_mask >> 1) & 1) == 1)? 0x0F000000 : 0x00000000;
crm += (((fm_mask >> 2) & 1) == 1)? 0x00F00000 : 0x00000000; crm += (((fm_mask >> 2) & 1) == 1)? 0x00F00000 : 0x00000000;