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[dxso] normalize 0 to 0 with strict float emulation

This commit is contained in:
Georg Lehmann 2022-08-19 10:27:23 +02:00 committed by Joshie
parent 85cc87e42a
commit 155944c2b4
1 changed files with 9 additions and 9 deletions
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18
src/dxso/dxso_compiler.cpp
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@ -2070,18 +2070,18 @@ namespace dxvk {
DxsoRegMask srcMask(true, true, true, false);
auto vec3 = emitRegisterLoad(src[0], srcMask);
DxsoRegisterValue dot = emitDot(vec3, vec3);
dot.id = m_module.opInverseSqrt (scalarTypeId, dot.id);
// No need for emitDot, either both arguments or none are zero.
// mul_zero has the same result as ieee mul.
uint32_t dot = m_module.opDot(scalarTypeId, vec3.id, vec3.id);
DxsoRegisterValue rcpLength;
rcpLength.type = scalarType;
rcpLength.id = m_module.opInverseSqrt(scalarTypeId, dot);
if (m_moduleInfo.options.d3d9FloatEmulation == D3D9FloatEmulation::Enabled) {
dot.id = m_module.opNMin (scalarTypeId, dot.id,
m_module.constf32(FLT_MAX));
rcpLength.id = m_module.opNMin(scalarTypeId, rcpLength.id, m_module.constf32(FLT_MAX));
}
// r * rsq(r . r);
result.id = m_module.opVectorTimesScalar(
typeId,
emitRegisterLoad(src[0], mask).id,
dot.id);
// r * rsq(r . r)
result.id = emitMul(vec3, emitRegisterExtend(rcpLength, 3)).id;
break;
}
case DxsoOpcode::SinCos: {