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[Shader JIT] Compile MAD to FMA when possible

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wheremyfoodat 2023-06-30 02:02:56 +03:00
parent cd04ed3770
commit 8a13b8c878
2 changed files with 20 additions and 9 deletions
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27
src/core/PICA/dynapica/shader_rec_emitter_x64.cpp
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@ -580,17 +580,26 @@ void ShaderEmitter::recMAD(const PICAShader& shader, u32 instruction) {
loadRegister<3>(src3_xmm, shader, src3, 0, operandDescriptor);
// TODO: Implement safe PICA mul
// Multiply src1 * src2
if (haveAVX) {
vmulps(scratch1, src1_xmm, src2_xmm);
} else {
movaps(scratch1, src1_xmm);
mulps(scratch1, src2_xmm);
// If we have FMA3, optimize MAD to use FMA
if (haveFMA3) {
vfmadd213ps(src1_xmm, src2_xmm, src3_xmm);
storeRegister(src1_xmm, shader, dest, operandDescriptor);
}
// If we don't have FMA3, do a multiplication and addition
else {
// Multiply src1 * src2
if (haveAVX) {
vmulps(scratch1, src1_xmm, src2_xmm);
} else {
movaps(scratch1, src1_xmm);
mulps(scratch1, src2_xmm);
}
// Add src3
addps(scratch1, src3_xmm);
storeRegister(scratch1, shader, dest, operandDescriptor);
// Add src3
addps(scratch1, src3_xmm);
storeRegister(scratch1, shader, dest, operandDescriptor);
}
}
void ShaderEmitter::recCMP(const PICAShader& shader, u32 instruction) {