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de-duplicate swp(b)

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This commit is contained in:
Jaklyy 2024-08-27 17:23:18 -04:00
parent a9aad74539
commit be290da23c
1 changed files with 20 additions and 23 deletions
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43
src/ARMInterpreter_LoadStore.cpp
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@ -360,48 +360,45 @@ A_IMPLEMENT_HD_LDRSTR(LDRSH)
void A_SWP(ARM* cpu)
template<bool byte>
inline void SWP(ARM* cpu)
{
u32 base = cpu->R[(cpu->CurInstr >> 16) & 0xF];
u32 rm = cpu->R[cpu->CurInstr & 0xF];
if ((cpu->CurInstr & 0xF) == 15) rm += 4;
u32 val;
if (cpu->DataRead32(base, &val))
if ((byte ? cpu->DataRead8 (base, &val)
: cpu->DataRead32(base, &val)))
{
u32 numD = cpu->DataCycles;
if (cpu->DataWrite32(base, rm))
if ((byte ? cpu->DataWrite8 (base, rm)
: cpu->DataWrite32(base, rm)))
{
// rd only gets updated if both read and write succeed
u32 rd = (cpu->CurInstr >> 12) & 0xF;
if (rd != 15) cpu->R[rd] = ROR(val, 8*(base&0x3));
else if (cpu->Num==1) cpu->JumpTo(ROR(val, 8*(base&0x3)) & ~1); // for some reason these jumps don't work on the arm 9?
if constexpr (!byte) val = ROR(val, 8*(base&0x3));
if (rd != 15) cpu->R[rd] = val;
else if (cpu->Num==1) cpu->JumpTo(val & ~1); // for some reason these jumps don't seem to work on the arm 9?
}
cpu->DataCycles += numD;
}
cpu->AddCycles_CDI();
}
void A_SWP(ARM* cpu)
{
void SWP<false>(ARM* cpu);
}
void A_SWPB(ARM* cpu)
{
u32 base = cpu->R[(cpu->CurInstr >> 16) & 0xF];
u32 rm = cpu->R[cpu->CurInstr & 0xF] & 0xFF;
if ((cpu->CurInstr & 0xF) == 15) rm += 4;
u32 val;
if (cpu->DataRead8(base, &val))
{
u32 numD = cpu->DataCycles;
if (cpu->DataWrite8(base, rm))
{
// rd only gets updated if both read and write succeed
u32 rd = (cpu->CurInstr >> 12) & 0xF;
if (rd != 15) cpu->R[rd] = val;
else if (cpu->Num==1) cpu->JumpTo(val & ~1); // for some reason these jumps don't work on the arm 9?
}
cpu->DataCycles += numD;
}
cpu->AddCycles_CDI();
void SWP<true>(ARM* cpu);
}