void Jit64::ComputeRC(const Gen::OpArg & arg) {
if( arg.IsImm() )
{
s32 value = (s32)arg.offset;
if( value < 0 )
MOV(8, M(&PowerPC::ppcState.cr_fast[0]), Imm8(0x8));
else if( value > 0 )
MOV(8, M(&PowerPC::ppcState.cr_fast[0]), Imm8(0x4));
else
MOV(8, M(&PowerPC::ppcState.cr_fast[0]), Imm8(0x2));
}
else
{
if (arg.IsSimpleReg())
TEST(32, arg, arg);
else
CMP(32, arg, Imm8(0));
FixupBranch pLesser = J_CC(CC_L);
FixupBranch pGreater = J_CC(CC_G);
MOV(8, M(&PowerPC::ppcState.cr_fast[0]), Imm8(0x2)); // _x86Reg == 0
FixupBranch continue1 = J();
SetJumpTarget(pGreater);
MOV(8, M(&PowerPC::ppcState.cr_fast[0]), Imm8(0x4)); // _x86Reg > 0
FixupBranch continue2 = J();
SetJumpTarget(pLesser);
MOV(8, M(&PowerPC::ppcState.cr_fast[0]), Imm8(0x8)); // _x86Reg < 0
SetJumpTarget(continue1);
SetJumpTarget(continue2);
}
}
void Jit64::ComputeRC(const Gen::OpArg & arg)
{
if (arg.IsImm())
{
MOV(64, M(&PowerPC::ppcState.cr_val[0]), Imm32((s32)arg.offset));
}
else
{
MOVSX(64, 32, RAX, arg);
MOV(64, M(&PowerPC::ppcState.cr_val[0]), R(RAX));
}
}
void EmuCodeBlock::UnsafeLoadToEAX(const Gen::OpArg & opAddress, int accessSize, s32 offset, bool signExtend)
{
#ifdef _M_X64
if (opAddress.IsSimpleReg())
{
MOVZX(32, accessSize, EAX, MComplex(RBX, opAddress.GetSimpleReg(), SCALE_1, offset));
}
else
{
MOV(32, R(EAX), opAddress);
MOVZX(32, accessSize, EAX, MComplex(RBX, EAX, SCALE_1, offset));
}
#else
if (opAddress.IsImm())
{
MOVZX(32, accessSize, EAX, M(Memory::base + (((u32)opAddress.offset + offset) & Memory::MEMVIEW32_MASK)));
}
else
{
if (!opAddress.IsSimpleReg(EAX))
MOV(32, R(EAX), opAddress);
AND(32, R(EAX), Imm32(Memory::MEMVIEW32_MASK));
MOVZX(32, accessSize, EAX, MDisp(EAX, (u32)Memory::base + offset));
}
#endif
// Add a 2 bytes NOP to have some space for the backpatching
if (accessSize == 8)
NOP(2);
if (accessSize == 32)
{
BSWAP(32, EAX);
}
else if (accessSize == 16)
{
BSWAP(32, EAX);
if (signExtend)
SAR(32, R(EAX), Imm8(16));
else
SHR(32, R(EAX), Imm8(16));
}
else if (signExtend)
{
// TODO: bake 8-bit into the original load.
MOVSX(32, accessSize, EAX, R(EAX));
}
}
void EmuCodeBlock::SafeLoadToEAX(const Gen::OpArg & opAddress, int accessSize, s32 offset, bool signExtend)
{
#if defined(_M_X64)
#ifdef ENABLE_MEM_CHECK
if (!Core::g_CoreStartupParameter.bMMU && !Core::g_CoreStartupParameter.bEnableDebugging)
#else
if (!Core::g_CoreStartupParameter.bMMU)
#endif
{
UnsafeLoadToEAX(opAddress, accessSize, offset, signExtend);
}
else
#endif
{
u32 mem_mask = Memory::ADDR_MASK_HW_ACCESS;
if (Core::g_CoreStartupParameter.bMMU || Core::g_CoreStartupParameter.iTLBHack)
{
mem_mask |= Memory::ADDR_MASK_MEM1;
}
#ifdef ENABLE_MEM_CHECK
if (Core::g_CoreStartupParameter.bEnableDebugging)
{
mem_mask |= Memory::EXRAM_MASK;
}
#endif
if (opAddress.IsImm())
{
u32 address = (u32)opAddress.offset + offset;
if ((address & mem_mask) == 0)
{
UnsafeLoadToEAX(opAddress, accessSize, offset, signExtend);
}
else
{
switch (accessSize)
{
case 32: ABI_CallFunctionC(thunks.ProtectFunction((void *)&Memory::Read_U32, 1), address); break;
case 16: ABI_CallFunctionC(thunks.ProtectFunction((void *)&Memory::Read_U16_ZX, 1), address); break;
case 8: ABI_CallFunctionC(thunks.ProtectFunction((void *)&Memory::Read_U8_ZX, 1), address); break;
}
if (signExtend && accessSize < 32)
{
// Need to sign extend values coming from the Read_U* functions.
MOVSX(32, accessSize, EAX, R(EAX));
}
}
}
else
{
if (offset)
{
MOV(32, R(EAX), opAddress);
ADD(32, R(EAX), Imm32(offset));
TEST(32, R(EAX), Imm32(mem_mask));
FixupBranch fast = J_CC(CC_Z);
switch (accessSize)
{
case 32: ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U32, 1), EAX); break;
case 16: ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U16_ZX, 1), EAX); break;
case 8: ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U8_ZX, 1), EAX); break;
}
if (signExtend && accessSize < 32)
{
// Need to sign extend values coming from the Read_U* functions.
MOVSX(32, accessSize, EAX, R(EAX));
}
FixupBranch exit = J();
SetJumpTarget(fast);
UnsafeLoadToEAX(R(EAX), accessSize, 0, signExtend);
SetJumpTarget(exit);
}
else
{
TEST(32, opAddress, Imm32(mem_mask));
FixupBranch fast = J_CC(CC_Z);
switch (accessSize)
{
case 32: ABI_CallFunctionA(thunks.ProtectFunction((void *)&Memory::Read_U32, 1), opAddress); break;
case 16: ABI_CallFunctionA(thunks.ProtectFunction((void *)&Memory::Read_U16_ZX, 1), opAddress); break;
case 8: ABI_CallFunctionA(thunks.ProtectFunction((void *)&Memory::Read_U8_ZX, 1), opAddress); break;
}
if (signExtend && accessSize < 32)
{
// Need to sign extend values coming from the Read_U* functions.
MOVSX(32, accessSize, EAX, R(EAX));
}
FixupBranch exit = J();
SetJumpTarget(fast);
UnsafeLoadToEAX(opAddress, accessSize, offset, signExtend);
SetJumpTarget(exit);
}
}
}
}
