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x86/x64: Minor vertex decoder optimization

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This commit is contained in:
Henrik Rydgard 2016-03-22 18:36:08 +01:00
parent b0329e8106
commit e270b955bb
1 changed files with 42 additions and 7 deletions
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49
GPU/Common/VertexDecoderX86.cpp
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@ -379,13 +379,48 @@ void VertexDecoderJitCache::Jit_WeightsU16ToFloat() {
void VertexDecoderJitCache::Jit_WeightsFloat() {
int j;
for (j = 0; j < dec_->nweights; j++) {
MOV(32, R(tempReg1), MDisp(srcReg, dec_->weightoff + j * 4));
MOV(32, MDisp(dstReg, dec_->decFmt.w0off + j * 4), R(tempReg1));
}
while (j & 3) { // Zero additional weights rounding up to 4.
MOV(32, MDisp(dstReg, dec_->decFmt.w0off + j * 4), Imm32(0));
j++;
switch (dec_->nweights) {
case 1:
// MOVSS: When the source operand is a memory location and destination operand is an XMM register, the three high-order doublewords of the destination operand are cleared to all 0s.
MOVSS(XMM3, MDisp(srcReg, dec_->weightoff));
MOVUPS(MDisp(dstReg, dec_->decFmt.w0off), XMM3);
break;
// Don't we have an emitter for MOVQ?
//case 2:
// MOVQ(XMM3, MDisp(srcReg, dec_->weightoff));
// MOVUPS(MDisp(dstReg, dec_->decFmt.w0off), XMM3);
// break;
case 4:
MOVUPS(XMM3, MDisp(srcReg, dec_->weightoff));
MOVUPS(MDisp(dstReg, dec_->decFmt.w0off), XMM3);
break;
case 5:
MOVUPS(XMM3, MDisp(srcReg, dec_->weightoff));
MOVSS(XMM4, MDisp(srcReg, dec_->weightoff + 16));
MOVUPS(MDisp(dstReg, dec_->decFmt.w0off), XMM3);
MOVUPS(MDisp(dstReg, dec_->decFmt.w0off + 16), XMM4);
break;
case 8:
MOVUPS(XMM3, MDisp(srcReg, dec_->weightoff));
MOVUPS(XMM4, MDisp(srcReg, dec_->weightoff + 16));
MOVUPS(MDisp(dstReg, dec_->decFmt.w0off), XMM3);
MOVUPS(MDisp(dstReg, dec_->decFmt.w0off + 16), XMM4);
break;
default:
for (j = 0; j < dec_->nweights; j++) {
MOV(32, R(tempReg1), MDisp(srcReg, dec_->weightoff + j * 4));
MOV(32, MDisp(dstReg, dec_->decFmt.w0off + j * 4), R(tempReg1));
}
while (j & 3) { // Zero additional weights rounding up to 4.
MOV(32, MDisp(dstReg, dec_->decFmt.w0off + j * 4), Imm32(0));
j++;
}
break;
}
}