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authorLioncash <mathew1800@gmail.com>2015-01-12 06:43:12 +0100
committerLioncash <mathew1800@gmail.com>2015-01-12 07:03:58 +0100
commit3ace75a49f54d73a1d3ba876ef8dc0b03adc677f (patch)
tree19d25fb8240bdb0759e3e61364a26aa37e2af03b /src/core/arm
parentdyncom: Add a helper function for addition with a carry (diff)
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Diffstat (limited to 'src/core/arm')
-rw-r--r--src/core/arm/dyncom/arm_dyncom_interpreter.cpp79
1 files changed, 41 insertions, 38 deletions
diff --git a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
index 4c0a8f5cb..88982d5fb 100644
--- a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
+++ b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp
@@ -4034,14 +4034,17 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
}
ADD_INST:
{
- add_inst *inst_cream = (add_inst *)inst_base->component;
- if ((inst_base->cond == 0xe) || CondPassed(cpu, inst_base->cond)) {
- lop = RN;
- if (inst_cream->Rn == 15) {
- lop += 2 * GET_INST_SIZE(cpu);
- }
- rop = SHIFTER_OPERAND;
- RD = dst = lop + rop;
+ if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
+ add_inst* const inst_cream = (add_inst*)inst_base->component;
+
+ u32 rn_val = RN;
+ if (inst_cream->Rn == 15)
+ rn_val += 2 * GET_INST_SIZE(cpu);
+
+ bool carry;
+ bool overflow;
+ RD = AddWithCarry(rn_val, SHIFTER_OPERAND, 0, &carry, &overflow);
+
if (inst_cream->S && (inst_cream->Rd == 15)) {
if (CurrentModeHasSPSR) {
cpu->Cpsr = cpu->Spsr_copy;
@@ -4049,10 +4052,10 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
LOAD_NZCVT;
}
} else if (inst_cream->S) {
- UPDATE_NFLAG(dst);
- UPDATE_ZFLAG(dst);
- UPDATE_CFLAG(dst, lop, rop);
- UPDATE_VFLAG((int)dst, (int)lop, (int)rop);
+ UPDATE_NFLAG(RD);
+ UPDATE_ZFLAG(RD);
+ cpu->CFlag = carry;
+ cpu->VFlag = overflow;
}
if (inst_cream->Rd == 15) {
INC_PC(sizeof(add_inst));
@@ -5459,11 +5462,13 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
SBC_INST:
{
- sbc_inst *inst_cream = (sbc_inst *)inst_base->component;
- if ((inst_base->cond == 0xe) || CondPassed(cpu, inst_base->cond)) {
- lop = SHIFTER_OPERAND + !cpu->CFlag;
- rop = RN;
- RD = dst = rop - lop;
+ if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
+ sbc_inst* const inst_cream = (sbc_inst*)inst_base->component;
+
+ bool carry;
+ bool overflow;
+ RD = AddWithCarry(RN, ~SHIFTER_OPERAND, cpu->CFlag, &carry, &overflow);
+
if (inst_cream->S && (inst_cream->Rd == 15)) {
if (CurrentModeHasSPSR) {
cpu->Cpsr = cpu->Spsr_copy;
@@ -5471,15 +5476,10 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
LOAD_NZCVT;
}
} else if (inst_cream->S) {
- UPDATE_NFLAG(dst);
- UPDATE_ZFLAG(dst);
-
- if(rop >= !cpu->CFlag)
- UPDATE_CFLAG_NOT_BORROW_FROM(rop - !cpu->CFlag, SHIFTER_OPERAND);
- else
- UPDATE_CFLAG_NOT_BORROW_FROM(rop, !cpu->CFlag);
-
- UPDATE_VFLAG_OVERFLOW_FROM(dst, rop, lop);
+ UPDATE_NFLAG(RD);
+ UPDATE_ZFLAG(RD);
+ cpu->CFlag = carry;
+ cpu->VFlag = overflow;
}
if (inst_cream->Rd == 15) {
INC_PC(sizeof(sbc_inst));
@@ -6257,14 +6257,17 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
}
SUB_INST:
{
- sub_inst *inst_cream = (sub_inst *)inst_base->component;
- if ((inst_base->cond == 0xe) || CondPassed(cpu, inst_base->cond)) {
- lop = RN;
- if (inst_cream->Rn == 15) {
- lop += 8;
- }
- rop = SHIFTER_OPERAND;
- RD = dst = lop - rop;
+ if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) {
+ sub_inst* const inst_cream = (sub_inst*)inst_base->component;
+
+ u32 rn_val = RN;
+ if (inst_cream->Rn == 15)
+ rn_val += 8;
+
+ bool carry;
+ bool overflow;
+ RD = AddWithCarry(rn_val, ~SHIFTER_OPERAND, 1, &carry, &overflow);
+
if (inst_cream->S && (inst_cream->Rd == 15)) {
if (CurrentModeHasSPSR) {
cpu->Cpsr = cpu->Spsr_copy;
@@ -6272,10 +6275,10 @@ unsigned InterpreterMainLoop(ARMul_State* state) {
LOAD_NZCVT;
}
} else if (inst_cream->S) {
- UPDATE_NFLAG(dst);
- UPDATE_ZFLAG(dst);
- UPDATE_CFLAG_NOT_BORROW_FROM(lop, rop);
- UPDATE_VFLAG_OVERFLOW_FROM(dst, lop, rop);
+ UPDATE_NFLAG(RD);
+ UPDATE_ZFLAG(RD);
+ cpu->CFlag = carry;
+ cpu->VFlag = overflow;
}
if (inst_cream->Rd == 15) {
INC_PC(sizeof(sub_inst));