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VertexDecoder: Minor optimization for x86/64 CPUs not supporting SSE4. #18476

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Dec 5, 2023
Merged

VertexDecoder: Minor optimization for x86/64 CPUs not supporting SSE4. #18476

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28 changes: 6 additions & 22 deletions GPU/Common/VertexDecoderX86.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1496,16 +1496,12 @@ void VertexDecoderJitCache::Jit_PosFloatSkin() {
}

void VertexDecoderJitCache::Jit_AnyS8ToFloat(int srcoff) {
if (!cpu_info.bSSE4_1) {
PXOR(XMM3, R(XMM3));
}
MOVD_xmm(XMM1, MDisp(srcReg, srcoff));
if (cpu_info.bSSE4_1) {
PMOVSXBD(XMM1, R(XMM1));
} else {
PUNPCKLBW(XMM1, R(XMM3));
PUNPCKLWD(XMM1, R(XMM3));
PSLLD(XMM1, 24);
PUNPCKLBW(XMM1, R(XMM1));
PUNPCKLWD(XMM1, R(XMM1));
PSRAD(XMM1, 24);
}
CVTDQ2PS(XMM3, R(XMM1));
Expand All @@ -1518,15 +1514,11 @@ void VertexDecoderJitCache::Jit_AnyS8ToFloat(int srcoff) {
}

void VertexDecoderJitCache::Jit_AnyS16ToFloat(int srcoff) {
if (!cpu_info.bSSE4_1) {
PXOR(XMM3, R(XMM3));
}
MOVQ_xmm(XMM1, MDisp(srcReg, srcoff));
if (cpu_info.bSSE4_1) {
PMOVSXWD(XMM1, R(XMM1));
} else {
PUNPCKLWD(XMM1, R(XMM3));
PSLLD(XMM1, 16);
PUNPCKLWD(XMM1, R(XMM1));
PSRAD(XMM1, 16);
}
CVTDQ2PS(XMM3, R(XMM1));
Expand Down Expand Up @@ -1604,9 +1596,6 @@ void VertexDecoderJitCache::Jit_AnyU16ToFloat(int srcoff, u32 bits) {

void VertexDecoderJitCache::Jit_AnyS8Morph(int srcoff, int dstoff) {
MOV(PTRBITS, R(tempReg1), ImmPtr(&gstate_c.morphWeights[0]));
if (!cpu_info.bSSE4_1) {
PXOR(fpScratchReg4, R(fpScratchReg4));
}
if (RipAccessible(&by128)) {
MOVAPS(XMM5, M(&by128)); // rip accessible
} else {
Expand All @@ -1623,9 +1612,8 @@ void VertexDecoderJitCache::Jit_AnyS8Morph(int srcoff, int dstoff) {
if (cpu_info.bSSE4_1) {
PMOVSXBD(reg, R(reg));
} else {
PUNPCKLBW(reg, R(fpScratchReg4));
PUNPCKLWD(reg, R(fpScratchReg4));
PSLLD(reg, 24);
PUNPCKLBW(reg, R(reg));
PUNPCKLWD(reg, R(reg));
PSRAD(reg, 24);
}
CVTDQ2PS(reg, R(reg));
Expand All @@ -1648,9 +1636,6 @@ void VertexDecoderJitCache::Jit_AnyS8Morph(int srcoff, int dstoff) {

void VertexDecoderJitCache::Jit_AnyS16Morph(int srcoff, int dstoff) {
MOV(PTRBITS, R(tempReg1), ImmPtr(&gstate_c.morphWeights[0]));
if (!cpu_info.bSSE4_1) {
PXOR(fpScratchReg4, R(fpScratchReg4));
}
if (RipAccessible(&by32768)) {
MOVAPS(XMM5, M(&by32768)); // rip accessible
} else {
Expand All @@ -1667,8 +1652,7 @@ void VertexDecoderJitCache::Jit_AnyS16Morph(int srcoff, int dstoff) {
if (cpu_info.bSSE4_1) {
PMOVSXWD(reg, R(reg));
} else {
PUNPCKLWD(reg, R(fpScratchReg4));
PSLLD(reg, 16);
PUNPCKLWD(reg, R(reg));
PSRAD(reg, 16);
}
CVTDQ2PS(reg, R(reg));
Expand Down