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dyncom: Add a helper function for addition with a carry

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This commit is contained in:
Lioncash
2015-01-12 00:01:46 -05:00
parent eacc2a501b
commit 9c2c89b7e1
3 changed files with 26 additions and 12 deletions
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21
src/core/arm/dyncom/arm_dyncom_interpreter.cpp
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@ -4003,16 +4003,13 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
}
ADC_INST:
{
adc_inst *inst_cream = (adc_inst *)inst_base->component;
if ((inst_base->cond == 0xe) || CondPassed(cpu, inst_base->cond)) {
u32 left = RN;
u32 right = SHIFTER_OPERAND;
if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
adc_inst* const inst_cream = (adc_inst*)inst_base->component;
u64 unsigned_sum = (left + right + cpu->CFlag);
s64 signed_sum = (s64)(s32)left + (s64)(s32)right + (s64)cpu->CFlag;
u32 result = (unsigned_sum & 0xFFFFFFFF);
bool carry;
bool overflow;
RD = AddWithCarry(RN, SHIFTER_OPERAND, cpu->CFlag, &carry, &overflow);
RD = result;
if (inst_cream->S && (inst_cream->Rd == 15)) {
if (CurrentModeHasSPSR) {
cpu->Cpsr = cpu->Spsr_copy;
@ -4020,10 +4017,10 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
LOAD_NZCVT;
}
} else if (inst_cream->S) {
UPDATE_NFLAG(result);
UPDATE_ZFLAG(result);
UPDATE_CFLAG_CARRY_FROM_ADD(left, right, cpu->CFlag);
cpu->VFlag = ((s64)(s32)result != signed_sum);
UPDATE_NFLAG(RD);
UPDATE_ZFLAG(RD);
cpu->CFlag = carry;
cpu->VFlag = overflow;
}
if (inst_cream->Rd == 15) {
INC_PC(sizeof(adc_inst));