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[SM6.10][Exec][Bugfix] Add matrix layout conversion helpers, add post-dispatch callback, and re-enable OuterProduct test #8606

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[SM6.10][Exec][Bugfix] Add matrix layout conversion helpers, add post-dispatch callback, and re-enable OuterProduct test #8606

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d45ae90
Add matrix conversion helpers and enable outer product exec test
Icohedron Jul 3, 2026
c5f5a56
Convert source buffer into correct layout before conversion
Icohedron Jul 6, 2026
766b220
chore: autopublish 2026-07-06T20:29:53Z
github-actions[bot] Jul 6, 2026
2a915ec
Remove redundant HLSL_EXEC_LINALG_HOST_CONVERSION_AVAILABLE def
Icohedron Jul 7, 2026
6ea2dbb
Replace post-execute command list+queue with a post-dispatch callback
Icohedron Jul 8, 2026
5b626d2
Use .at for more robust resource acquisition
Icohedron Jul 9, 2026
d62a82d
LogErrorFmt OuterProduct test in HLK if no matrix conversion API is a…
Icohedron Jul 9, 2026
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67 changes: 65 additions & 2 deletions tools/clang/unittests/HLSLExec/HlslExecTestUtils.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -725,12 +725,15 @@ void addRootView(st::ShaderOp *Op, UINT Index, const char *ResName) {
std::shared_ptr<st::ShaderOpTestResult>
runShaderOp(ID3D12Device *Device, dxc::SpecificDllLoader &DxcSupport,
std::unique_ptr<st::ShaderOp> Op,
st::ShaderOpTest::TInitCallbackFn InitCallback) {
st::ShaderOpTest::TInitCallbackFn InitCallback,
st::ShaderOpTest::TCommandCallbackFn PostDispatchCallback) {
auto OpSet = std::make_shared<st::ShaderOpSet>();
OpSet->ShaderOps.push_back(std::move(Op));

return st::RunShaderOpTestAfterParse(
Device, DxcSupport, nullptr, std::move(InitCallback), std::move(OpSet));
Device, DxcSupport, nullptr, std::move(InitCallback),
/*pShaderCallback=*/nullptr, std::move(PostDispatchCallback),
std::move(OpSet));
}

void compileShader(dxc::SpecificDllLoader &DxcSupport, const char *Source,
Expand Down Expand Up @@ -796,3 +799,63 @@ void compileShader(dxc::SpecificDllLoader &DxcSupport, const char *Source,
VERIFY_SUCCEEDED(HR);
}
}

#if defined(DIRECT3D_LINEAR_ALGEBRA)
UINT getLinAlgMatrixByteSize(ID3D12Device *Device, UINT NumRows,
UINT NumColumns,
D3D12_LINEAR_ALGEBRA_DATATYPE DataType,
D3D12_LINEAR_ALGEBRA_MATRIX_LAYOUT Layout,
UINT Stride) {
CComPtr<ID3D12DevicePreview> DevicePreview;
VERIFY_SUCCEEDED(Device->QueryInterface(IID_PPV_ARGS(&DevicePreview)));

D3D12_LINEAR_ALGEBRA_MATRIX_CONVERSION_DEST_INFO Info = {};
Info.DestSize = 0;
Info.DestLayout = Layout;
Info.DestStride = Stride;
Info.NumRows = NumRows;
Info.NumColumns = NumColumns;
Info.DestDataType = DataType;
DevicePreview->GetLinearAlgebraMatrixConversionDestinationInfo(&Info);
return Info.DestSize;
}

void recordLinAlgMatrixConversion(
ID3D12GraphicsCommandList *List, ID3D12Resource *SrcBuffer, UINT SrcSize,
ID3D12Resource *DestBuffer, UINT DestSize, UINT NumRows, UINT NumColumns,
D3D12_LINEAR_ALGEBRA_DATATYPE DataType,
D3D12_LINEAR_ALGEBRA_MATRIX_LAYOUT SrcLayout, UINT SrcStride,
D3D12_LINEAR_ALGEBRA_MATRIX_LAYOUT DestLayout, UINT DestStride) {
CComPtr<ID3D12GraphicsCommandListPreview> PreviewList;
VERIFY_SUCCEEDED(List->QueryInterface(IID_PPV_ARGS(&PreviewList)));

// Per the linear-algebra spec, ConvertLinearAlgebraMatrix (legacy barriers)
// requires the source buffer in NON_PIXEL_SHADER_RESOURCE and the destination
// in UNORDERED_ACCESS. The caller passes both in UNORDERED_ACCESS (the
// ShaderOp default UAV state), so transition the source to the required read
// state; the destination is already in UNORDERED_ACCESS.
D3D12_RESOURCE_BARRIER Barrier = {};
Barrier.Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
Barrier.Transition.pResource = SrcBuffer;
Barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
Barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_UNORDERED_ACCESS;
Barrier.Transition.StateAfter =
D3D12_RESOURCE_STATE_NON_PIXEL_SHADER_RESOURCE;
List->ResourceBarrier(1, &Barrier);

D3D12_LINEAR_ALGEBRA_MATRIX_CONVERSION_INFO Info = {};
Info.DestInfo.DestSize = DestSize;
Info.DestInfo.DestLayout = DestLayout;
Info.DestInfo.DestStride = DestStride;
Info.DestInfo.NumRows = NumRows;
Info.DestInfo.NumColumns = NumColumns;
Info.DestInfo.DestDataType = DataType;
Info.SrcInfo.SrcSize = SrcSize;
Info.SrcInfo.SrcDataType = DataType;
Info.SrcInfo.SrcLayout = SrcLayout;
Info.SrcInfo.SrcStride = SrcStride;
Info.DataDesc.DestVA = DestBuffer->GetGPUVirtualAddress();
Info.DataDesc.SrcVA = SrcBuffer->GetGPUVirtualAddress();
PreviewList->ConvertLinearAlgebraMatrix(&Info, 1);
}
#endif // defined(DIRECT3D_LINEAR_ALGEBRA)
40 changes: 36 additions & 4 deletions tools/clang/unittests/HLSLExec/HlslExecTestUtils.h
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Original file line number Diff line number Diff line change
Expand Up @@ -96,15 +96,47 @@ void addSRVBuffer(st::ShaderOp *Op, const char *Name, UINT64 Width,
void addRootView(st::ShaderOp *Op, UINT Index, const char *ResName);

/// Run a programmatically-built ShaderOp and return the result.
std::shared_ptr<st::ShaderOpTestResult>
runShaderOp(ID3D12Device *Device, dxc::SpecificDllLoader &DxcSupport,
std::unique_ptr<st::ShaderOp> Op,
st::ShaderOpTest::TInitCallbackFn InitCallback = nullptr);
std::shared_ptr<st::ShaderOpTestResult> runShaderOp(
ID3D12Device *Device, dxc::SpecificDllLoader &DxcSupport,
std::unique_ptr<st::ShaderOp> Op,
st::ShaderOpTest::TInitCallbackFn InitCallback = nullptr,
st::ShaderOpTest::TCommandCallbackFn PostDispatchCallback = nullptr);

/// Compiles an HLSL shader using the DXC API to verify it is well-formed.
/// Fails the test on compile error.
void compileShader(dxc::SpecificDllLoader &DxcSupport, const char *Source,
const char *Target, const std::string &Args,
bool VerboseLogging = false);

// Host-side linear-algebra matrix-conversion helpers. These need the D3D12
// linear-algebra API (the D3D12_LINEAR_ALGEBRA_* types and the conversion
// methods on ID3D12DevicePreview / ID3D12GraphicsCommandListPreview), which is
// gated behind the preview SDK's DIRECT3D_LINEAR_ALGEBRA feature macro. When
// absent, these helpers and the tests using them are compiled out (they Skip at
// runtime).
#if defined(DIRECT3D_LINEAR_ALGEBRA)
/// Query the number of bytes required to store an NumRows x NumColumns matrix
/// of the given datatype in the specified device layout.
UINT getLinAlgMatrixByteSize(ID3D12Device *Device, UINT NumRows,
UINT NumColumns,
D3D12_LINEAR_ALGEBRA_DATATYPE DataType,
D3D12_LINEAR_ALGEBRA_MATRIX_LAYOUT Layout,
UINT Stride);

/// Record a GPU matrix layout conversion onto \p List using
/// ID3D12GraphicsCommandListPreview::ConvertLinearAlgebraMatrix. Both
/// \p SrcBuffer (in \p SrcLayout) and \p DestBuffer (receiving \p DestLayout)
/// must be passed in the D3D12_RESOURCE_STATE_UNORDERED_ACCESS state; the
/// conversion requires the source in NON_PIXEL_SHADER_RESOURCE, so this helper
/// transitions it and leaves the destination in UNORDERED_ACCESS. The caller is
/// responsible for ensuring that writes to \p SrcBuffer have completed before
/// this conversion reads it.
void recordLinAlgMatrixConversion(
ID3D12GraphicsCommandList *List, ID3D12Resource *SrcBuffer, UINT SrcSize,
ID3D12Resource *DestBuffer, UINT DestSize, UINT NumRows, UINT NumColumns,
D3D12_LINEAR_ALGEBRA_DATATYPE DataType,
D3D12_LINEAR_ALGEBRA_MATRIX_LAYOUT SrcLayout, UINT SrcStride,
D3D12_LINEAR_ALGEBRA_MATRIX_LAYOUT DestLayout, UINT DestStride);
#endif // defined(DIRECT3D_LINEAR_ALGEBRA)

#endif // HLSLEXECTESTUTILS_H
83 changes: 74 additions & 9 deletions tools/clang/unittests/HLSLExec/LinAlgTests.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -349,9 +349,7 @@ class DxilConf_SM610_LinAlg {
// Matrix Vector Arithmetic
TEST_METHOD(MatVecMul_Thread_16x16_F16);
TEST_METHOD(MatVecMulAdd_Thread_16x16_F16);
#if 0
TEST_METHOD(OuterProduct_Thread_16x16_F16);
#endif

// Query Accumulator Layout
TEST_METHOD(QueryAccumLayout);
Expand Down Expand Up @@ -1321,7 +1319,29 @@ void DxilConf_SM610_LinAlg::MatVecMulAdd_Thread_16x16_F16() {
ComponentType::F16);
}

#if 0
// Map a DXIL ComponentType to the D3D12 linear-algebra datatype used by the
// host-side matrix conversion API.
#if defined(DIRECT3D_LINEAR_ALGEBRA)
static D3D12_LINEAR_ALGEBRA_DATATYPE toLinAlgDataType(ComponentType CT) {
switch (CT) {
case ComponentType::F16:
return D3D12_LINEAR_ALGEBRA_DATATYPE_FLOAT16;
case ComponentType::F32:
return D3D12_LINEAR_ALGEBRA_DATATYPE_FLOAT32;
case ComponentType::I16:
return D3D12_LINEAR_ALGEBRA_DATATYPE_SINT16;
case ComponentType::U16:
return D3D12_LINEAR_ALGEBRA_DATATYPE_UINT16;
case ComponentType::I32:
return D3D12_LINEAR_ALGEBRA_DATATYPE_SINT32;
case ComponentType::U32:
return D3D12_LINEAR_ALGEBRA_DATATYPE_UINT32;
default:
VERIFY_IS_TRUE(false, "Unsupported component type for linalg conversion");
return D3D12_LINEAR_ALGEBRA_DATATYPE_FLOAT16;
}
}

static const char OuterProductShader[] = R"(
#define USE_A 0
#define SCOPE_THREAD 0
Expand All @@ -1348,8 +1368,11 @@ static const char OuterProductShader[] = R"(
Mat;
__builtin_LinAlg_MatrixOuterProduct(Mat, VecA, VecB);

// Outer product accumulators are stored in the OuterProductOptimal layout
// with stride 0 and no alignment requirement (align 0), matching the
// dx::linalg header's thread-scoped InterlockedAccumulate.
__builtin_LinAlg_MatrixAccumulateToDescriptor(
Mat, Output, 0, STRIDE, LAYOUT, 128);
Mat, Output, 0, STRIDE, LAYOUT, 0);
}
)";

Expand All @@ -1359,7 +1382,18 @@ static void runOuterProduct(ID3D12Device *Device,
const size_t NumVecElements = Params.M + Params.N;
const size_t InBuffSize = NumVecElements * elementSize(Params.CompType);
const size_t NumMatElements = Params.totalElements();
const size_t OutBufferSize = Params.totalBytes();
const D3D12_LINEAR_ALGEBRA_DATATYPE DataType =
toLinAlgDataType(Params.CompType);

const UINT OutBufferSize = getLinAlgMatrixByteSize(
Device, Params.M, Params.N, DataType,
D3D12_LINEAR_ALGEBRA_MATRIX_LAYOUT_OUTER_PRODUCT_OPTIMAL, /*Stride=*/0);

const UINT RowMajorStride =
static_cast<UINT>(Params.N * elementSize(Params.CompType));
const UINT RowMajorSize = getLinAlgMatrixByteSize(
Device, Params.M, Params.N, DataType,
D3D12_LINEAR_ALGEBRA_MATRIX_LAYOUT_ROW_MAJOR, RowMajorStride);

std::string Args = buildCompilerArgs(Params);

Expand All @@ -1371,7 +1405,8 @@ static void runOuterProduct(ID3D12Device *Device,
auto Op = createComputeOp(OuterProductShader, "cs_6_10", "UAV(u0), UAV(u1)",
Args.c_str());
addUAVBuffer(Op.get(), "Input", InBuffSize, false, "byname");
addUAVBuffer(Op.get(), "Output", OutBufferSize, true);
addUAVBuffer(Op.get(), "Output", OutBufferSize, /*ReadBack=*/false);

@bob80905 bob80905 Jul 7, 2026

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Maybe I'm wrong, but I see you using GetResource on the "Output" buffer, in the code below. Doesn't that mean that this ReadBack bool should remain true?

@Icohedron Icohedron Jul 7, 2026 •
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The "Output" buffer is not being read by the CPU, so the ReadBack bool is false. The "Output" buffer is also in the opaque outer-product-optimal layout, so we shouldn't even try to interpret it without first converting it to a layout we do know how to read.

The GetResource just obtains a handle to be able to refer to the "Output" buffer so that we can record a ConvertLinearAlgebraMatrix command into the command list to tell the GPU to convert it into row-major order and store it into "OutputRowMajor", which the CPU does read back.

addUAVBuffer(Op.get(), "OutputRowMajor", RowMajorSize, /*ReadBack=*/true);
addRootView(Op.get(), 0, "Input");
addRootView(Op.get(), 1, "Output");

Expand All @@ -1383,27 +1418,57 @@ static void runOuterProduct(ID3D12Device *Device,
NumVecElements,
/*StartingVal=*/2, /*Increment=*/false),
"Saw unsupported component type");
},
[OutBufferSize, RowMajorSize, RowMajorStride, DataType,
Params](ID3D12GraphicsCommandList *List, st::ShaderOpTest *Test) {
ID3D12Resource *OptimalBuffer = nullptr;
ID3D12Resource *RowMajorBuffer = nullptr;
Test->GetResource("Output", &OptimalBuffer);
Test->GetResource("OutputRowMajor", &RowMajorBuffer);
recordLinAlgMatrixConversion(
List, OptimalBuffer, OutBufferSize, RowMajorBuffer, RowMajorSize,
Params.M, Params.N, DataType,
D3D12_LINEAR_ALGEBRA_MATRIX_LAYOUT_OUTER_PRODUCT_OPTIMAL,
/*SrcStride=*/0, D3D12_LINEAR_ALGEBRA_MATRIX_LAYOUT_ROW_MAJOR,
RowMajorStride);
});

MappedData OutData;
Result->Test->GetReadBackData("Output", &OutData);
Result->Test->GetReadBackData("OutputRowMajor", &OutData);

VERIFY_IS_TRUE(verifyComponentBuffer(Params.CompType, OutData.data(),
Expected, NumMatElements, Verbose));
}
#endif // defined(DIRECT3D_LINEAR_ALGEBRA)

void DxilConf_SM610_LinAlg::OuterProduct_Thread_16x16_F16() {
#if defined(DIRECT3D_LINEAR_ALGEBRA)
MatrixParams Params = {};
Params.CompType = ComponentType::F16;
Params.M = 16;
Params.N = 16;
Params.Scope = MatrixScope::Thread;
Params.Layout = LinalgMatrixLayout::RowMajor;
Params.Layout = LinalgMatrixLayout::OuterProductOptimal;
Params.NumThreads = 1;
Params.Enable16Bit = true;
runOuterProduct(D3DDevice, DxcSupport, Params, VerboseLogging);
#else
#ifdef _HLK_CONF
// HLK forbids skipping, so treat the missing linear-algebra matrix-conversion
// API as a failure rather than emitting a (compiled-out) skip.
hlsl_test::LogErrorFmt(L"OuterProduct_Thread_16x16_F16 requires the "
L"linear-algebra matrix-conversion API "
L"(DIRECT3D_LINEAR_ALGEBRA), which this build lacks");
#else
WEX::Logging::Log::Comment(

@V-FEXrt V-FEXrt Jul 8, 2026 •
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Why is it sometimes required to compile out this test?

@Icohedron Icohedron Jul 8, 2026 •
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The test requires compiling against the preview Agility SDK whose headers provide the linear algebra matrix conversion APIs. Without it, the matrix can not be converted and therefore the output can not be validated.

L"Skipping OuterProduct_Thread_16x16_F16: built against a D3D12 SDK "
L"without the linear-algebra matrix-conversion API "
L"(DIRECT3D_LINEAR_ALGEBRA undefined); the host-side conversion helpers "
L"are compiled out.");
WEX::Logging::Log::Result(WEX::Logging::TestResults::Skipped);

@alsepkow alsepkow Jul 8, 2026

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We can't skip HLK tests. Only exec tests.
You can compile this skip out for HLK builds. See: https://github.com/Icohedron/DirectXShaderCompiler/blob/6ea2dbb1776de31d2dde70773bd9f81cc96b12ea/tools/clang/unittests/HLSLExec/LinAlgTests.cpp#L384

#endif // _HLK_CONF
#endif // defined(DIRECT3D_LINEAR_ALGEBRA)
}
#endif

static const char QueryAccumLayoutShader[] = R"(
RWByteAddressBuffer Output : register(u0);
Expand Down
38 changes: 31 additions & 7 deletions tools/clang/unittests/HLSLExec/ShaderOpTest.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -928,6 +928,13 @@ void ShaderOpTest::GetReadBackData(LPCSTR pResourceName, MappedData *pData) {
pData->reset(D.ReadBack, sizeInBytes);
}

void ShaderOpTest::GetResource(LPCSTR pResourceName,
ID3D12Resource **ppResource) {
pResourceName = m_pShaderOp->Strings.insert(pResourceName); // Unique
ShaderOpResourceData &D = m_ResourceData.at(pResourceName);
*ppResource = D.Resource.p;
}

static void SetDescriptorHeaps(ID3D12GraphicsCommandList *pList,
std::vector<ID3D12DescriptorHeap *> &heaps) {
if (heaps.empty())
Expand All @@ -951,6 +958,8 @@ void ShaderOpTest::RunCommandList() {
SetRootValues(pList, m_pShaderOp->IsCompute());
pList->Dispatch(m_pShaderOp->DispatchX, m_pShaderOp->DispatchY,
m_pShaderOp->DispatchZ);
if (m_PostDispatchCallbackFn)
m_PostDispatchCallbackFn(pList, this);
} else {
pList->SetPipelineState(m_pPSO);
SetDescriptorHeaps(pList, m_DescriptorHeaps);
Expand Down Expand Up @@ -1150,6 +1159,10 @@ void ShaderOpTest::SetInitCallback(TInitCallbackFn InitCallbackFn) {
void ShaderOpTest::SetShaderCallback(TShaderCallbackFn ShaderCallbackFn) {
m_ShaderCallbackFn = ShaderCallbackFn;
}
void ShaderOpTest::SetPostDispatchCallback(
TCommandCallbackFn PostDispatchCallbackFn) {
m_PostDispatchCallbackFn = PostDispatchCallbackFn;
}

void ShaderOpTest::SetupRenderTarget(ShaderOp *pShaderOp, ID3D12Device *pDevice,
ID3D12CommandQueue *pCommandQueue,
Expand Down Expand Up @@ -2750,12 +2763,12 @@ bool ShaderOpParser::ReadAtElementName(IXmlReader *pReader, LPCWSTR pName) {
}
}

std::shared_ptr<ShaderOpTestResult>
RunShaderOpTestAfterParse(ID3D12Device *pDevice,
dxc::SpecificDllLoader &support, LPCSTR pName,
st::ShaderOpTest::TInitCallbackFn pInitCallback,
st::ShaderOpTest::TShaderCallbackFn pShaderCallback,
std::shared_ptr<st::ShaderOpSet> ShaderOpSet) {
std::shared_ptr<ShaderOpTestResult> RunShaderOpTestAfterParse(
ID3D12Device *pDevice, dxc::SpecificDllLoader &support, LPCSTR pName,
st::ShaderOpTest::TInitCallbackFn pInitCallback,
st::ShaderOpTest::TShaderCallbackFn pShaderCallback,
st::ShaderOpTest::TCommandCallbackFn pPostDispatchCallback,
std::shared_ptr<st::ShaderOpSet> ShaderOpSet) {
st::ShaderOp *pShaderOp;
if (pName == nullptr) {
if (ShaderOpSet->ShaderOps.size() != 1) {
Expand Down Expand Up @@ -2786,6 +2799,7 @@ RunShaderOpTestAfterParse(ID3D12Device *pDevice,
test->SetSpecificDllLoader(&support);
test->SetInitCallback(pInitCallback);
test->SetShaderCallback(pShaderCallback);
test->SetPostDispatchCallback(pPostDispatchCallback);
test->SetDevice(pDevice);
test->RunShaderOp(pShaderOp);

Expand All @@ -2797,13 +2811,23 @@ RunShaderOpTestAfterParse(ID3D12Device *pDevice,
return result;
}

std::shared_ptr<ShaderOpTestResult>
RunShaderOpTestAfterParse(ID3D12Device *pDevice,
dxc::SpecificDllLoader &support, LPCSTR pName,
st::ShaderOpTest::TInitCallbackFn pInitCallback,
st::ShaderOpTest::TShaderCallbackFn pShaderCallback,
std::shared_ptr<st::ShaderOpSet> ShaderOpSet) {
return RunShaderOpTestAfterParse(pDevice, support, pName, pInitCallback,
pShaderCallback, nullptr, ShaderOpSet);
}

std::shared_ptr<ShaderOpTestResult>
RunShaderOpTestAfterParse(ID3D12Device *pDevice,
dxc::SpecificDllLoader &support, LPCSTR pName,
st::ShaderOpTest::TInitCallbackFn pInitCallback,
std::shared_ptr<st::ShaderOpSet> ShaderOpSet) {
return RunShaderOpTestAfterParse(pDevice, support, pName, pInitCallback,
nullptr, ShaderOpSet);
nullptr, nullptr, ShaderOpSet);
}

std::shared_ptr<ShaderOpTestResult>
Expand Down
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