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Differential D127879

[mlir][GPUToNVVM] Fix bug in mma elementwise lowering
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Authored by ThomasRaoux on Jun 15 2022, 10:19 AM.

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antiagainst
herhut
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rGa6f2c2291ede: [mlir][GPUToNVVM] Fix bug in mma elementwise lowering
Summary

The maxf implementation of wmma elementwise op was incorrect as the
operands of the select to check for Nan were swapped.

Diff Detail

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ThomasRaoux created this revision.Jun 15 2022, 10:19 AM
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ThomasRaoux requested review of this revision.Jun 15 2022, 10:19 AM
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antiagainst accepted this revision.Jun 15 2022, 10:21 AM
This revision is now accepted and ready to land.Jun 15 2022, 10:21 AM
This revision was landed with ongoing or failed builds.Jun 15 2022, 10:23 AM
Closed by commit rGa6f2c2291ede: [mlir][GPUToNVVM] Fix bug in mma elementwise lowering (authored by ThomasRaoux). · Explain Why
This revision was automatically updated to reflect the committed changes.
ThomasRaoux added a commit: rGa6f2c2291ede: [mlir][GPUToNVVM] Fix bug in mma elementwise lowering.
Harbormaster completed remote builds in B170038: Diff 437236.Jun 15 2022, 11:39 AM

Revision Contents

PathSize
mlir/
lib/
Conversion/
GPUToNVVM/
2 lines
test/
Conversion/
GPUToNVVM/
40 lines

Diff 437238

mlir/lib/Conversion/GPUToNVVM/WmmaOpsToNvvm.cpp

Show First 20 Lines • Show All 287 Lines • ▼ Show 20 Lines Value cmp = builder.create<LLVM::FCmpOp>(
lhs, rhs); lhs, rhs);
Value sel = builder.create<LLVM::SelectOp>(loc, cmp, lhs, rhs); Value sel = builder.create<LLVM::SelectOp>(loc, cmp, lhs, rhs);
Value isNan = builder.create<LLVM::FCmpOp>( Value isNan = builder.create<LLVM::FCmpOp>(
loc, i1Type, LLVM::FCmpPredicate::uno, lhs, rhs); loc, i1Type, LLVM::FCmpPredicate::uno, lhs, rhs);
Value nan = builder.create<LLVM::ConstantOp>( Value nan = builder.create<LLVM::ConstantOp>(
loc, lhs.getType(), loc, lhs.getType(),
builder.getFloatAttr(floatType, builder.getFloatAttr(floatType,
APFloat::getQNaN(floatType.getFloatSemantics()))); APFloat::getQNaN(floatType.getFloatSemantics())));
return builder.create<LLVM::SelectOp>(loc, isNan, sel, nan); return builder.create<LLVM::SelectOp>(loc, isNan, nan, sel);
} }
static Value createScalarOp(OpBuilder &builder, Location loc, static Value createScalarOp(OpBuilder &builder, Location loc,
gpu::MMAElementwiseOp op, gpu::MMAElementwiseOp op,
ArrayRef<Value> operands) { ArrayRef<Value> operands) {
switch (op) { switch (op) {
case gpu::MMAElementwiseOp::ADDF: case gpu::MMAElementwiseOp::ADDF:
return builder.create<LLVM::FAddOp>(loc, operands[0].getType(), operands); return builder.create<LLVM::FAddOp>(loc, operands[0].getType(), operands);
▲ Show 20 Lines • Show All 72 Lines • Show Last 20 Lines

mlir/test/Conversion/GPUToNVVM/wmma-ops-to-nvvm.mlir

Show First 20 Lines • Show All 225 Lines • ▼ Show 20 Lines
// CHECK: %[[A2:.*]] = llvm.extractvalue %{{.*}}[2 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)> // CHECK: %[[A2:.*]] = llvm.extractvalue %{{.*}}[2 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[B2:.*]] = llvm.extractvalue %{{.*}}[2 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)> // CHECK: %[[B2:.*]] = llvm.extractvalue %{{.*}}[2 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[C2:.*]] = llvm.fadd %[[A2]], %[[B2]] : vector<2xf16> // CHECK: %[[C2:.*]] = llvm.fadd %[[A2]], %[[B2]] : vector<2xf16>
// CHECK: %[[M3:.*]] = llvm.insertvalue %[[C2]], %[[M2]][2 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)> // CHECK: %[[M3:.*]] = llvm.insertvalue %[[C2]], %[[M2]][2 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[A3:.*]] = llvm.extractvalue %{{.*}}[3 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)> // CHECK: %[[A3:.*]] = llvm.extractvalue %{{.*}}[3 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[B3:.*]] = llvm.extractvalue %{{.*}}[3 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)> // CHECK: %[[B3:.*]] = llvm.extractvalue %{{.*}}[3 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[C3:.*]] = llvm.fadd %[[A3]], %[[B3]] : vector<2xf16> // CHECK: %[[C3:.*]] = llvm.fadd %[[A3]], %[[B3]] : vector<2xf16>
// CHECK: %[[M4:.*]] = llvm.insertvalue %[[C3]], %[[M3]][3 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)> // CHECK: %[[M4:.*]] = llvm.insertvalue %[[C3]], %[[M3]][3 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: llvm.return %[[M4]] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[M0:.*]] = llvm.mlir.undef : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[A0:.*]] = llvm.extractvalue %{{.*}}[0 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[B0:.*]] = llvm.extractvalue %{{.*}}[0 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[CMP0:.*]] = llvm.fcmp "ogt" %[[A0]], %[[B0]] : vector<2xf16>
// CHECK: %[[SEL0:.*]] = llvm.select %[[CMP0]], %[[A0]], %[[B0]] : vector<2xi1>, vector<2xf16>
// CHECK: %[[CMP1:.*]] = llvm.fcmp "uno" %[[A0]], %[[B0]] : vector<2xf16>
// CHECK: %[[NAN:.*]] = llvm.mlir.constant(0x7E00 : f16) : vector<2xf16>
// CHECK: %[[C0:.*]] = llvm.select %[[CMP1]], %[[NAN]], %[[SEL0]] : vector<2xi1>, vector<2xf16>
// CHECK: %[[M1:.*]] = llvm.insertvalue %[[C0]], %[[M0]][0 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[A1:.*]] = llvm.extractvalue %{{.*}}[1 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[B1:.*]] = llvm.extractvalue %{{.*}}[1 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[CMP2:.*]] = llvm.fcmp "ogt" %[[A1]], %[[B1]] : vector<2xf16>
// CHECK: %[[SEL1:.*]] = llvm.select %[[CMP2]], %[[A1]], %[[B1]] : vector<2xi1>, vector<2xf16>
// CHECK: %[[CMP3:.*]] = llvm.fcmp "uno" %[[A1]], %[[B1]] : vector<2xf16>
// CHECK: %[[NAN:.*]] = llvm.mlir.constant(0x7E00 : f16) : vector<2xf16>
// CHECK: %[[C1:.*]] = llvm.select %[[CMP3]], %[[NAN]], %[[SEL1]] : vector<2xi1>, vector<2xf16>
// CHECK: %[[M2:.*]] = llvm.insertvalue %[[C1]], %[[M1]][1 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[A2:.*]] = llvm.extractvalue %{{.*}}[2 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[B2:.*]] = llvm.extractvalue %{{.*}}[2 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[CMP4:.*]] = llvm.fcmp "ogt" %[[A2]], %[[B2]] : vector<2xf16>
// CHECK: %[[SEL2:.*]] = llvm.select %[[CMP4]], %[[A2]], %[[B2]] : vector<2xi1>, vector<2xf16>
// CHECK: %[[CMP5:.*]] = llvm.fcmp "uno" %[[A2]], %[[B2]] : vector<2xf16>
// CHECK: %[[NAN:.*]] = llvm.mlir.constant(0x7E00 : f16) : vector<2xf16>
// CHECK: %[[C2:.*]] = llvm.select %[[CMP5]], %[[NAN]], %[[SEL2]] : vector<2xi1>, vector<2xf16>
// CHECK: %[[M3:.*]] = llvm.insertvalue %[[C2]], %[[M2]][2 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[A3:.*]] = llvm.extractvalue %{{.*}}[3 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[B3:.*]] = llvm.extractvalue %{{.*}}[3 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: %[[CMP6:.*]] = llvm.fcmp "ogt" %[[A3]], %[[B3]] : vector<2xf16>
// CHECK: %[[SEL3:.*]] = llvm.select %[[CMP6]], %[[A3]], %[[B3]] : vector<2xi1>, vector<2xf16>
// CHECK: %[[CMP7:.*]] = llvm.fcmp "uno" %[[A3]], %[[B3]] : vector<2xf16>
// CHECK: %[[NAN:.*]] = llvm.mlir.constant(0x7E00 : f16) : vector<2xf16>
// CHECK: %[[C3:.*]] = llvm.select %[[CMP7]], %[[NAN]], %[[SEL3]] : vector<2xi1>, vector<2xf16>
// CHECK: %[[M5:.*]] = llvm.insertvalue %[[C3]], %[[M3]][3 : i32] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
// CHECK: llvm.return %[[M5]] : !llvm.struct<(vector<2xf16>, vector<2xf16>, vector<2xf16>, vector<2xf16>)>
func.func @gpu_wmma_elementwise(%A : !gpu.mma_matrix<16x16xf16, "COp">, %B : !gpu.mma_matrix<16x16xf16, "COp">) ->(!gpu.mma_matrix<16x16xf16, "COp">) { func.func @gpu_wmma_elementwise(%A : !gpu.mma_matrix<16x16xf16, "COp">, %B : !gpu.mma_matrix<16x16xf16, "COp">) ->(!gpu.mma_matrix<16x16xf16, "COp">) {
%C = gpu.subgroup_mma_elementwise addf %A, %B : (!gpu.mma_matrix<16x16xf16, "COp">, !gpu.mma_matrix<16x16xf16, "COp">) -> !gpu.mma_matrix<16x16xf16, "COp"> %C = gpu.subgroup_mma_elementwise addf %A, %B : (!gpu.mma_matrix<16x16xf16, "COp">, !gpu.mma_matrix<16x16xf16, "COp">) -> !gpu.mma_matrix<16x16xf16, "COp">
return %C : !gpu.mma_matrix<16x16xf16, "COp"> %D = gpu.subgroup_mma_elementwise maxf %C, %B : (!gpu.mma_matrix<16x16xf16, "COp">, !gpu.mma_matrix<16x16xf16, "COp">) -> !gpu.mma_matrix<16x16xf16, "COp">
return %D : !gpu.mma_matrix<16x16xf16, "COp">
} }
} }