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[dxvk] Use only one spec constant for fragment shader output component mapping

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Let's trust the driver to be able to constant-fold bitfieldExtract operations.
This commit is contained in:
Philip Rebohle 2021-01-29 16:17:07 +01:00
parent 307f43ff1e
commit 3a993d0c5c
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GPG Key ID: C8CC613427A31C99
3 changed files with 11 additions and 14 deletions
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15
src/dxbc/dxbc_compiler.cpp
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@ -5904,16 +5904,15 @@ namespace dxvk {
uint32_t specTypeId = getScalarTypeId(DxbcScalarType::Uint32);
uint32_t compTypeId = getScalarTypeId(vector.type.ctype);
uint32_t specId = m_module.specConst32(specTypeId, 0x3210);
m_module.decorateSpecId(specId, uint32_t(DxvkSpecConstantId::ColorComponentMappings) + i);
m_module.setDebugName(specId, str::format("omap", i).c_str());
std::array<uint32_t, 4> scalars;
for (uint32_t c = 0; c < vector.type.ccount; c++) {
const char* components = "rgba";
uint32_t specId = m_module.specConst32(specTypeId, c);
m_module.decorateSpecId(specId, uint32_t(DxvkSpecConstantId::ColorComponentMappings) + 4 * i + c);
m_module.setDebugName(specId, str::format("omap", i, ".", components[c]).c_str());
scalars[c] = m_module.opVectorExtractDynamic(compTypeId, vector.id, specId);
scalars[c] = m_module.opVectorExtractDynamic(compTypeId, vector.id,
m_module.opBitFieldUExtract(specTypeId, specId,
m_module.constu32(4 * c), m_module.constu32(4)));
}
uint32_t typeId = getVectorTypeId(vector.type);

8
src/dxvk/dxvk_graphics.cpp
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@ -167,11 +167,9 @@ namespace dxvk {
for (uint32_t i = 0; i < MaxNumRenderTargets; i++) {
if ((m_fsOut & (1 << i)) != 0) {
uint32_t specId = uint32_t(DxvkSpecConstantId::ColorComponentMappings) + 4 * i;
specData.set(specId + 0, state.omSwizzle[i].rIndex(), 0u);
specData.set(specId + 1, state.omSwizzle[i].gIndex(), 1u);
specData.set(specId + 2, state.omSwizzle[i].bIndex(), 2u);
specData.set(specId + 3, state.omSwizzle[i].aIndex(), 3u);
specData.set(uint32_t(DxvkSpecConstantId::ColorComponentMappings) + i,
state.omSwizzle[i].rIndex() << 0 | state.omSwizzle[i].gIndex() << 4 |
state.omSwizzle[i].bIndex() << 8 | state.omSwizzle[i].aIndex() << 12, 0x3210u);
}
}

2
src/dxvk/dxvk_shader.h
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@ -29,7 +29,7 @@ namespace dxvk {
ColorComponentMappings = MaxNumResourceSlots,
// Specialization constants for pipeline state
SpecConstantRangeStart = ColorComponentMappings + MaxNumRenderTargets * 4,
SpecConstantRangeStart = ColorComponentMappings + MaxNumRenderTargets,
RasterizerSampleCount = SpecConstantRangeStart + 0,
FirstPipelineConstant
};