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[dxbc] Generate smallest possible vectors for local arrays

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FXC is buggy and always emits vec4 in the array declaration,
so we'll have to analyze the used components ourselves.
This commit is contained in:
Philip Rebohle 2022-03-24 12:43:39 +01:00
parent b2f22d5719
commit c590736fec
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GPG Key ID: C8CC613427A31C99
3 changed files with 15 additions and 6 deletions
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9
src/dxbc/dxbc_analysis.cpp
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@ -78,7 +78,14 @@ namespace dxvk {
} break;
default:
return;
break;
}
for (uint32_t i = 0; i < ins.dstCount; i++) {
if (ins.dst[0].type == DxbcOperandType::IndexableTemp) {
uint32_t index = ins.dst[0].idx[0].offset;
m_analysis->xRegMasks[index] |= ins.dst[0].mask;
}
}
}

1
src/dxbc/dxbc_analysis.h
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@ -35,6 +35,7 @@ namespace dxvk {
*/
struct DxbcAnalysisInfo {
std::array<DxbcUavInfo, 64> uavInfos;
std::array<DxbcRegMask, 4096> xRegMasks;
DxbcClipCullInfo clipCullIn;
DxbcClipCullInfo clipCullOut;

9
src/dxbc/dxbc_compiler.cpp
View File

@ -381,15 +381,16 @@ namespace dxvk {
// dcl_indexable_temps has three operands:
// (imm0) Array register index (x#)
// (imm1) Number of vectors stored in the array
// (imm2) Component count of each individual vector
// (imm2) Component count of each individual vector. This is
// always 4 in fxc-generated binaries and therefore useless.
const uint32_t regId = ins.imm[0].u32;
DxbcRegisterInfo info;
info.type.ctype = DxbcScalarType::Float32;
info.type.ccount = ins.imm[2].u32;
info.type.ccount = m_analysis->xRegMasks.at(regId).minComponents();
info.type.alength = ins.imm[1].u32;
info.sclass = spv::StorageClassPrivate;
const uint32_t regId = ins.imm[0].u32;
if (regId >= m_xRegs.size())
m_xRegs.resize(regId + 1);