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Obvious enhancements to load generation; should be a slight speedup. 

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@1253 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
magumagu9 2008-11-22 20:54:41 +00:00
parent a6d5a7ea9e
commit 9fe8f8b6dd
1 changed files with 12 additions and 11 deletions
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23
Source/Core/Core/Src/PowerPC/Jit64/Jit_Util.cpp
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@ -47,17 +47,18 @@ void UnsafeLoadRegToReg(X64Reg reg_addr, X64Reg reg_value, int accessSize, s32 o
#endif
if (accessSize == 32)
{
BSWAP(32, EAX);
BSWAP(32, reg_value);
}
else if (accessSize == 16)
{
BSWAP(32, EAX);
SHR(32, R(EAX), Imm8(16));
}
if (signExtend && accessSize < 32) {
// For 16-bit, this must be done AFTER the BSWAP.
BSWAP(32, reg_value);
if (signExtend)
SAR(32, R(reg_value), Imm8(16));
else
SHR(32, R(reg_value), Imm8(16));
} else if (signExtend) {
// TODO: bake 8-bit into the original load.
MOVSX(32, accessSize, EAX, R(EAX));
MOVSX(32, accessSize, reg_value, R(reg_value));
}
}
@ -66,10 +67,7 @@ void SafeLoadRegToEAX(X64Reg reg, int accessSize, s32 offset, bool signExtend)
if (offset)
ADD(32, R(reg), Imm32((u32)offset));
TEST(32, R(reg), Imm32(0x0C000000));
FixupBranch argh = J_CC(CC_NZ);
UnsafeLoadRegToReg(reg, EAX, accessSize, 0, signExtend);
FixupBranch arg2 = J();
SetJumpTarget(argh);
FixupBranch argh = J_CC(CC_Z);
switch (accessSize)
{
case 32: ABI_CallFunctionR(ProtectFunction((void *)&Memory::Read_U32, 1), reg); break;
@ -80,6 +78,9 @@ void SafeLoadRegToEAX(X64Reg reg, int accessSize, s32 offset, bool signExtend)
// Need to sign extend values coming from the Read_U* functions.
MOVSX(32, accessSize, EAX, R(EAX));
}
FixupBranch arg2 = J();
SetJumpTarget(argh);
UnsafeLoadRegToReg(reg, EAX, accessSize, 0, signExtend);
SetJumpTarget(arg2);
}