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[SM 6.10][LinAlg] Fixes float truncation and coordinate calculation in LinAlg exec tests #8420

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[SM 6.10][LinAlg] Fixes float truncation and coordinate calculation in LinAlg exec tests #8420

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106f381
Fixes float truncation and coordinate calculation in LinAlg exec tests
anupamachandra May 4, 2026
e8f988b
Update tools/clang/unittests/HLSLExec/LinAlgTests.cpp
anupamachandra May 6, 2026
b5c6442
Merge branch 'microsoft:main' into anupamac/linalg-exectest-fixes-01
anupamachandra May 6, 2026
cc624bd
Suffix fill value literals with F to ensure correct behavior outside …
anupamachandra May 6, 2026
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27 changes: 16 additions & 11 deletions tools/clang/unittests/HLSLExec/LinAlgTests.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -505,7 +505,7 @@ static void runSplatStore(ID3D12Device *Device,
const size_t BufferSize = Params.totalBytes();

std::stringstream ExtraDefs;
ExtraDefs << "-DFILL_VALUE=" << FillValue;
ExtraDefs << std::showpoint << "-DFILL_VALUE=" << FillValue << "F";

std::string Args = buildCompilerArgs(Params, ExtraDefs.str().c_str());

Expand Down Expand Up @@ -624,7 +624,7 @@ static const char ElementAccessShader[] = R"(
// flatten the 2D index into a 1D index then scale by element size
// Always store row-major and work it out in the test runner
uint coordToByteOffset(uint2 coord) {
return (coord.y * M_DIM + coord.x) * ELEM_SIZE;
return (coord.x * N_DIM + coord.y) * ELEM_SIZE;
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@tex3d tex3d May 4, 2026

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Good catch. It sure can be confusing for x to be row and y to be column, but makes most sense in context.

}

[WaveSize(4, 64)]
Expand Down Expand Up @@ -935,9 +935,10 @@ static void runMatMatMul(ID3D12Device *Device,
const size_t BufferSize = Params.totalBytes();

std::stringstream ExtraDefs;
ExtraDefs << std::showpoint;
ExtraDefs << " -DK_DIM=" << K;
ExtraDefs << " -DA_FILL=" << AFill;
ExtraDefs << " -DB_FILL=" << BFill;
ExtraDefs << " -DA_FILL=" << AFill << "F";
ExtraDefs << " -DB_FILL=" << BFill << "F";

std::string Args = buildCompilerArgs(Params, ExtraDefs.str().c_str());

Expand Down Expand Up @@ -1017,10 +1018,11 @@ static void runMatMatMulAccum(ID3D12Device *Device,
const size_t BufferSize = Params.totalBytes();

std::stringstream ExtraDefs;
ExtraDefs << std::showpoint;
ExtraDefs << " -DK_DIM=" << K;
ExtraDefs << " -DA_FILL=" << AFill;
ExtraDefs << " -DB_FILL=" << BFill;
ExtraDefs << " -DC_FILL=" << CFill;
ExtraDefs << " -DA_FILL=" << AFill << "F";
ExtraDefs << " -DB_FILL=" << BFill << "F";
ExtraDefs << " -DC_FILL=" << CFill << "F";

std::string Args = buildCompilerArgs(Params, ExtraDefs.str().c_str());

Expand Down Expand Up @@ -1094,8 +1096,9 @@ static void runMatAccum(ID3D12Device *Device,
const size_t BufferSize = Params.totalBytes();

std::stringstream ExtraDefs;
ExtraDefs << " -DLHS_FILL=" << LHSFill;
ExtraDefs << " -DRHS_FILL=" << RHSFill;
ExtraDefs << std::showpoint;
ExtraDefs << " -DLHS_FILL=" << LHSFill << "F";
ExtraDefs << " -DRHS_FILL=" << RHSFill << "F";

std::string Args = buildCompilerArgs(Params, ExtraDefs.str().c_str());

Expand Down Expand Up @@ -1551,8 +1554,9 @@ static void runStoreMemory(ID3D12Device *Device,
const size_t BufferSize = Params.totalBytes();

std::stringstream ExtraDefs;
ExtraDefs << std::showpoint;
ExtraDefs << " -DOFFSET=" << 0;
ExtraDefs << " -DFILL_VALUE=" << FillValue;
ExtraDefs << " -DFILL_VALUE=" << FillValue << "F";

std::string Args = buildCompilerArgs(Params, ExtraDefs.str().c_str());

Expand Down Expand Up @@ -1631,8 +1635,9 @@ static void runAccumulateMemory(ID3D12Device *Device,
const size_t BufferSize = Params.totalBytes();

std::stringstream ExtraDefs;
ExtraDefs << std::showpoint;
ExtraDefs << " -DOFFSET=" << 0;
ExtraDefs << " -DFILL_VALUE=" << FillValue;
ExtraDefs << " -DFILL_VALUE=" << FillValue << "F";

std::string Args = buildCompilerArgs(Params, ExtraDefs.str().c_str());

Expand Down
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