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[dxbc] Handle workgroup-coherent UAVs more efficiently

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Some drivers don't handle the workgroup scope on stores and loads properly,
so let's just do the availability and visibility operation on barriers.
This commit is contained in:
Philip Rebohle 2022-09-12 18:18:39 +02:00
parent 8842af2ad6
commit eda366662c
2 changed files with 38 additions and 27 deletions
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59
src/dxbc/dxbc_compiler.cpp
View File

@ -2587,14 +2587,18 @@ namespace dxvk {
memoryScope = spv::ScopeWorkgroup;
memorySemantics |= spv::MemorySemanticsImageMemoryMask
| spv::MemorySemanticsUniformMemoryMask
| spv::MemorySemanticsAcquireReleaseMask;
| spv::MemorySemanticsAcquireReleaseMask
| spv::MemorySemanticsMakeAvailableMask
| spv::MemorySemanticsMakeVisibleMask;
}
if (flags.test(DxbcSyncFlag::UavMemoryGlobal)) {
memoryScope = spv::ScopeQueueFamily;
memoryScope = m_hasGloballyCoherentUav ? spv::ScopeQueueFamily : spv::ScopeWorkgroup;
memorySemantics |= spv::MemorySemanticsImageMemoryMask
| spv::MemorySemanticsUniformMemoryMask
| spv::MemorySemanticsAcquireReleaseMask;
| spv::MemorySemanticsAcquireReleaseMask
| spv::MemorySemanticsMakeAvailableMask
| spv::MemorySemanticsMakeVisibleMask;
}
if (executionScope != spv::ScopeInvocation) {
@ -5192,21 +5196,22 @@ namespace dxvk {
uint32_t coherence = bufferInfo.coherence;
if (isTgsm || coherence)
memoryOperands.flags = spv::MemoryAccessNonPrivatePointerMask;
if (isTgsm && m_moduleInfo.options.forceVolatileTgsmAccess) {
memoryOperands.flags |= spv::MemoryAccessVolatileMask;
coherence = spv::ScopeWorkgroup;
}
if (coherence) {
memoryOperands.flags |= spv::MemoryAccessMakePointerVisibleMask;
memoryOperands.makeVisible = m_module.constu32(coherence);
memoryOperands.flags |= spv::MemoryAccessNonPrivatePointerMask;
imageOperands.flags = spv::ImageOperandsNonPrivateTexelMask
| spv::ImageOperandsMakeTexelVisibleMask;
imageOperands.makeVisible = m_module.constu32(coherence);
if (coherence != spv::ScopeInvocation) {
memoryOperands.flags |= spv::MemoryAccessMakePointerVisibleMask;
memoryOperands.makeVisible = m_module.constu32(coherence);
imageOperands.flags = spv::ImageOperandsNonPrivateTexelMask
| spv::ImageOperandsMakeTexelVisibleMask;
imageOperands.makeVisible = m_module.constu32(coherence);
}
}
sparseFeedbackId = 0;
@ -5316,21 +5321,22 @@ namespace dxvk {
uint32_t coherence = bufferInfo.coherence;
if (isTgsm || coherence)
memoryOperands.flags = spv::MemoryAccessNonPrivatePointerMask;
if (isTgsm && m_moduleInfo.options.forceVolatileTgsmAccess) {
memoryOperands.flags |= spv::MemoryAccessVolatileMask;
coherence = spv::ScopeWorkgroup;
}
if (coherence) {
memoryOperands.flags |= spv::MemoryAccessMakePointerAvailableMask;
memoryOperands.makeAvailable = m_module.constu32(coherence);
memoryOperands.flags = spv::MemoryAccessNonPrivatePointerMask;
imageOperands.flags = spv::ImageOperandsNonPrivateTexelMask
| spv::ImageOperandsMakeTexelAvailableMask;
imageOperands.makeAvailable = m_module.constu32(coherence);
if (coherence != spv::ScopeInvocation) {
memoryOperands.flags |= spv::MemoryAccessMakePointerAvailableMask;
memoryOperands.makeAvailable = m_module.constu32(coherence);
imageOperands.flags = spv::ImageOperandsNonPrivateTexelMask
| spv::ImageOperandsMakeTexelAvailableMask;
imageOperands.makeAvailable = m_module.constu32(coherence);
}
}
for (uint32_t i = 0; i < 4; i++) {
@ -7609,7 +7615,7 @@ namespace dxvk {
spv::StorageClassWorkgroup);
result.varId = m_gRegs.at(registerId).varId;
result.stride = m_gRegs.at(registerId).elementStride;
result.coherence = 0;
result.coherence = spv::ScopeInvocation;
result.isSsbo = false;
return result;
} break;
@ -7798,7 +7804,7 @@ namespace dxvk {
}
uint32_t DxbcCompiler::getUavCoherence(uint32_t registerId, DxbcUavFlags flags) const {
uint32_t DxbcCompiler::getUavCoherence(uint32_t registerId, DxbcUavFlags flags) {
// Ignore any resources that can't both be read and written in
// the current shader, explicit availability/visibility operands
// are not useful in that case.
@ -7807,13 +7813,16 @@ namespace dxvk {
// If the globally coherent flag is set, the resource must be
// coherent across multiple workgroups of the same dispatch
if (flags.test(DxbcUavFlag::GloballyCoherent))
if (flags.test(DxbcUavFlag::GloballyCoherent)) {
m_hasGloballyCoherentUav = true;
return spv::ScopeQueueFamily;
}
// In compute shaders, UAVs are implicitly workgroup coherent.
// In all other stage, there are no coherence guarantees.
// In compute shaders, UAVs are implicitly workgroup coherent,
// but we can rely on memory barrier instructions to make any
// access available and visible to the entire workgroup.
if (m_programInfo.type() == DxbcProgramType::ComputeShader)
return spv::ScopeWorkgroup;
return spv::ScopeInvocation;
return 0;
}

6
src/dxbc/dxbc_compiler.h
View File

@ -450,7 +450,9 @@ namespace dxvk {
std::array<DxbcSampler, 16> m_samplers;
std::array<DxbcShaderResource, 128> m_textures;
std::array<DxbcUav, 64> m_uavs;
bool m_hasGloballyCoherentUav = false;
///////////////////////////////////////////////
// Control flow information. Stores labels for
// currently active if-else blocks and loops.
@ -1225,7 +1227,7 @@ namespace dxvk {
uint32_t getUavCoherence(
uint32_t registerId,
DxbcUavFlags flags) const;
DxbcUavFlags flags);
///////////////////////////
// Type definition methods