mirror of https://github.com/llvm/torch-mlir
TorchToTosa: Cast float constants to correct type to support bfloat16 (#2239)
Matthias Gehre
GitHub
parent
45e2188615
commit
6f420019cb
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@ -55,7 +55,8 @@ std::optional<Value> getZerosLikeTensor(PatternRewriter &rewriter,
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// To create INT48 TOSA constant, need to pass in llvm::APInt instead.
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template <typename T>
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std::optional<Value> getConstTensor(PatternRewriter &rewriter, Operation *op,
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ArrayRef<T> vec, ArrayRef<int64_t> shape);
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ArrayRef<T> vec, ArrayRef<int64_t> shape,
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std::optional<Type> dtype = {});
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LogicalResult tosaCastTensorToType(PatternRewriter &rewriter, Operation *op,
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Value src, Type destType, Value &result);
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@ -145,7 +145,7 @@ LogicalResult torchScalarToTosaTensor(ConversionPatternRewriter &rewriter,
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if (dtype.isa<mlir::FloatType>()) {
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tosaTensor = tosa::getConstTensor<float>(
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rewriter, op, (isFloat ? doubleValue : intValue), dshape)
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rewriter, op, (isFloat ? doubleValue : intValue), dshape, dtype)
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.value();
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} else if (auto intType = dtype.dyn_cast<mlir::IntegerType>()) {
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auto w = intType.getWidth();
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@ -200,8 +200,9 @@ LogicalResult torchAlphaToTosaTensor(ConversionPatternRewriter &rewriter,
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return rewriter.notifyMatchFailure(op,
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"Unsupported integer value for alpha");
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alphaTensor =
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mlir::tosa::getTosaConstTensorSingleF32(rewriter, op, alphaValue);
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alphaTensor = tosa::getConstTensor<float>(
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rewriter, op, {static_cast<float>(alphaValue)}, {}, dtype)
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.value();
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return success();
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}
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@ -604,7 +605,7 @@ LogicalResult ConvertAtenOp<AtenLeakyReluOp>::matchAndRewrite(
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op, "Negative slope needs to be a scalar constant for conversion to "
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"TOSA LeakyReLU operation");
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auto zero = tosa::getConstTensor<float>(rewriter, op, 0, {}).value();
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auto zero = tosa::getConstTensor<float>(rewriter, op, 0, {}, selfTy.getElementType()).value();
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auto cond = rewriter.create<tosa::GreaterEqualOp>(
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op->getLoc(),
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RankedTensorType::get(selfTy.getShape(), rewriter.getIntegerType(1)),
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@ -1006,17 +1007,17 @@ LogicalResult ConvertAtenOp<AtenPowTensorScalarOp>::matchAndRewrite(
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return rewriter.notifyMatchFailure(
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op, "Only floating-point datatype legalization supported");
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auto outType =
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getTypeConverter()->convertType(op.getType()).template cast<TensorType>();
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Value expTensor;
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Value expScalar = op.getExponent();
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if (failed(torchScalarToTosaTensor(rewriter, op, expScalar, expTensor,
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selfTy.getElementType(), {})))
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outType.getElementType(), {})))
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return rewriter.notifyMatchFailure(
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op, "Currently only scalar constants are supported for "
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"conversion in TOSA Pow operation");
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auto outType =
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getTypeConverter()->convertType(op.getType()).template cast<TensorType>();
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auto powOp = tosa::createBinaryOpAndCast<tosa::PowOp>(rewriter, op, outType,
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self, expTensor);
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rewriter.replaceOp(op, powOp.getResult());
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@ -2159,7 +2160,10 @@ LogicalResult ConvertAtenOp<AtenBatchNormOp>::matchAndRewrite(
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return rewriter.notifyMatchFailure(op, "eps must be a scalar constant");
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auto epsilonConst =
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mlir::tosa::getTosaConstTensorSingleF32(rewriter, op, eps);
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tosa::getConstTensor<float>(rewriter, op.getOperation(),
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{static_cast<float>(eps)}, {},
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meanType.getElementType())
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.value();
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auto batchNorm =
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computeBatchNorm(op, rewriter, outType, adaptor.getInput(), varianceVal,
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@ -2263,7 +2267,7 @@ LogicalResult ConvertAtenOp<AtenNativeLayerNormOp>::matchAndRewrite(
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auto elemCntConst =
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tosa::getConstTensor<float>(rewriter, op.getOperation(),
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{static_cast<float>(elemCnt)}, {1})
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{static_cast<float>(elemCnt)}, {1}, elemTy)
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.value();
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Value elemCntRcp = rewriter.create<tosa::ReciprocalOp>(
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op.getLoc(), elemCntConst.getType(), elemCntConst);
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@ -2318,7 +2322,9 @@ LogicalResult ConvertAtenOp<AtenNativeLayerNormOp>::matchAndRewrite(
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if (!matchPattern(op.getEps(), m_TorchConstantFloat(&eps)))
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return rewriter.notifyMatchFailure(op, "eps must be a scalar constant");
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auto epsilonConst =
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mlir::tosa::getTosaConstTensorSingleF32(rewriter, op, eps);
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tosa::getConstTensor<float>(rewriter, op.getOperation(),
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{static_cast<float>(eps)}, {}, elemTy)
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.value();
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// Compute layer norm.
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auto layerNorm =
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@ -2471,9 +2477,9 @@ LogicalResult ConvertAtenOp<AtenLog2Op>::matchAndRewrite(
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// Constant value of ln2.
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SmallVector<int64_t> ln2Shape(selfType.getRank(), 1);
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auto ln2Op =
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tosa::getConstTensor<float>(rewriter, op, {0.69314718056}, ln2Shape)
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.value();
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auto ln2Op = tosa::getConstTensor<float>(rewriter, op, {0.69314718056},
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ln2Shape, selfType.getElementType())
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.value();
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auto rcpOp =
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rewriter.create<tosa::ReciprocalOp>(op.getLoc(), ln2Op.getType(), ln2Op);
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@ -2688,7 +2694,7 @@ LogicalResult ConvertAtenOp<AtenViewOp>::matchAndRewrite(
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}
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static Value approximateErfOp(ConversionPatternRewriter &rewriter,
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Operation *op, Value x) {
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Operation *op, Value x, Type dtype) {
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// Using:
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// https://en.wikipedia.org/wiki/Error_function#Numerical_approximations with
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// maximum error as 5 x 10^-4 where a1 = 0.278393, a2 = 0.230389, a3 =
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@ -2699,24 +2705,24 @@ static Value approximateErfOp(ConversionPatternRewriter &rewriter,
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auto outType = x.getType().cast<TensorType>();
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auto loc = op->getLoc();
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auto absX = rewriter.create<tosa::AbsOp>(loc, outType, x);
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auto zero = tosa::getConstTensor<float>(rewriter, op, 0, {}).value();
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auto one = tosa::getConstTensor<float>(rewriter, op, 1, {}).value();
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auto zero = tosa::getConstTensor<float>(rewriter, op, 0, {}, dtype).value();
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auto one = tosa::getConstTensor<float>(rewriter, op, 1, {}, dtype).value();
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auto a1 = tosa::getConstTensor<float>(rewriter, op, 0.278393, {}).value();
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auto a1 = tosa::getConstTensor<float>(rewriter, op, 0.278393, {}, dtype).value();
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auto a1X = rewriter.create<tosa::MulOp>(loc, outType, a1, absX, /*shift=*/0);
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auto sum = rewriter.create<tosa::AddOp>(loc, outType, a1X, one);
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auto a2 = tosa::getConstTensor<float>(rewriter, op, 0.230389, {}).value();
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auto a2 = tosa::getConstTensor<float>(rewriter, op, 0.230389, {}, dtype).value();
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auto x2 = rewriter.create<tosa::MulOp>(loc, outType, absX, absX, /*shift=*/0);
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auto a2X = rewriter.create<tosa::MulOp>(loc, outType, a2, x2, /*shift=*/0);
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sum = rewriter.create<tosa::AddOp>(loc, outType, sum, a2X);
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auto a3 = tosa::getConstTensor<float>(rewriter, op, 0.000972, {}).value();
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auto a3 = tosa::getConstTensor<float>(rewriter, op, 0.000972, {}, dtype).value();
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auto x3 = rewriter.create<tosa::MulOp>(loc, outType, x2, absX, /*shift=*/0);
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auto a3X = rewriter.create<tosa::MulOp>(loc, outType, a3, x3, /*shift=*/0);
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sum = rewriter.create<tosa::AddOp>(loc, outType, sum, a3X);
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auto a4 = tosa::getConstTensor<float>(rewriter, op, 0.078108, {}).value();
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auto a4 = tosa::getConstTensor<float>(rewriter, op, 0.078108, {}, dtype).value();
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auto x4 = rewriter.create<tosa::MulOp>(loc, outType, x3, absX, /*shift=*/0);
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auto a4X = rewriter.create<tosa::MulOp>(loc, outType, a4, x4, /*shift=*/0);
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sum = rewriter.create<tosa::AddOp>(loc, outType, sum, a4X);
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@ -2739,9 +2745,10 @@ static Value approximateErfOp(ConversionPatternRewriter &rewriter,
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}
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static Value buildUnitNormalCdf(ConversionPatternRewriter &rewriter,
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Operation *op, Value x) {
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auto zero = tosa::getConstTensor<float>(rewriter, op, 0, {}).value();
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auto one = tosa::getConstTensor<float>(rewriter, op, 1, {}).value();
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Operation *op, Value x, Type dtype) {
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auto zero = tosa::getConstTensor<float>(rewriter, op, 0, {}, dtype).value();
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auto one = tosa::getConstTensor<float>(rewriter, op, 1, {}, dtype).value();
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auto loc = op->getLoc();
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// buildNormalCdf, mean = zero, sigma = one
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@ -2750,12 +2757,14 @@ static Value buildUnitNormalCdf(ConversionPatternRewriter &rewriter,
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Value xMinusMean = rewriter.create<tosa::SubOp>(loc, outType, x, mean);
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// rsqrt of 2
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Value rsqrt2 =
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tosa::getConstTensor<float>(rewriter, op, 0.70710678, {}).value();
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tosa::getConstTensor<float>(rewriter, op, 0.70710678, {}, dtype).value();
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Value erfArg = rewriter.create<tosa::MulOp>(loc, outType, xMinusMean, rsqrt2,
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/*shift=*/0);
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Value erf = approximateErfOp(rewriter, op, erfArg);
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Value erf = approximateErfOp(rewriter, op, erfArg, dtype);
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Value erfPlus1 = rewriter.create<tosa::AddOp>(loc, outType, one, erf);
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Value oneHalf = tosa::getConstTensor<float>(rewriter, op, 0.5, {}).value();
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Value oneHalf = tosa::getConstTensor<float>(rewriter, op, 0.5, {}, dtype).value();
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Value normalCdf = rewriter.create<tosa::MulOp>(loc, outType, oneHalf,
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erfPlus1, /*shift=*/0);
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return normalCdf;
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@ -2786,7 +2795,10 @@ LogicalResult ConvertAtenOp<AtenGeluOp>::matchAndRewrite(
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return rewriter.notifyMatchFailure(op, "Unsupported value of approximate");
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}
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Value cdf = buildUnitNormalCdf(rewriter, op, adaptor.getSelf());
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Value cdf = buildUnitNormalCdf(rewriter, op, adaptor.getSelf(), selfElemTy);
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cdf = rewriter.createOrFold<tosa::CastOp>(
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op->getLoc(), cast<RankedTensorType>(cdf.getType()).cloneWith({}, selfElemTy), cdf);
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rewriter.replaceOpWithNewOp<tosa::MulOp>(
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op, getTypeConverter()->convertType(op.getType()), adaptor.getSelf(), cdf,
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/*shift=*/0);
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@ -2827,16 +2839,16 @@ LogicalResult ConvertAtenOp<AtenGeluBackwardOp>::matchAndRewrite(
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const double kAlpha = cstAlpha0 * cstAlpha1;
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Value kAlphaHalf =
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tosa::getConstTensor<float>(rewriter, op, kAlpha * oneHalf, {}).value();
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tosa::getConstTensor<float>(rewriter, op, kAlpha * oneHalf, {}, selfElemTy).value();
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Value negOneHalf =
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tosa::getConstTensor<float>(rewriter, op, -0.5, {}).value();
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tosa::getConstTensor<float>(rewriter, op, -0.5, {}, selfElemTy).value();
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Value inputSquared = rewriter.create<tosa::MulOp>(
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loc, selfType, adaptor.getSelf(), adaptor.getSelf(), /*shift=*/0);
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Value negHalfInputSquared = rewriter.create<tosa::MulOp>(
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loc, selfType, inputSquared, negOneHalf, /*shift=*/0);
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Value dinput =
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rewriter.create<tosa::ExpOp>(loc, selfType, negHalfInputSquared);
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Value cdf = buildUnitNormalCdf(rewriter, op, adaptor.getSelf());
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Value cdf = buildUnitNormalCdf(rewriter, op, adaptor.getSelf(), selfElemTy);
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Value dinputInput = rewriter.create<tosa::MulOp>(
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loc, selfType, dinput, adaptor.getSelf(), /*shift=*/0);
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Value dinputInputAlpha = rewriter.create<tosa::MulOp>(
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@ -2900,7 +2912,7 @@ LogicalResult ConvertAtenOp<AtenHardtanhBackwardOp>::matchAndRewrite(
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return rewriter.notifyMatchFailure(op, "Only scalar constant is supported");
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}
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Value replace = tosa::getConstTensor<float>(rewriter, op, 0, {}).value();
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Value replace = tosa::getConstTensor<float>(rewriter, op, 0, {}, selfElemTy).value();
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Type outType = getTypeConverter()->convertType(op.getType());
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Value lesser = rewriter.create<tosa::GreaterOp>(
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@ -174,7 +174,7 @@ std::optional<Value> getZerosLikeTensor(PatternRewriter &rewriter,
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// Default template creates a constant tensor in T.
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template <typename T>
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std::optional<Value> getConstTensor(PatternRewriter &rewriter, Operation *op,
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ArrayRef<T> vec, ArrayRef<int64_t> shape) {
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ArrayRef<T> vec, ArrayRef<int64_t> shape, std::optional<Type> dtype) {
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uint64_t num_total_elements = 1;
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for (int64_t a : shape) {
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num_total_elements *= a;
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@ -191,6 +191,11 @@ std::optional<Value> getConstTensor(PatternRewriter &rewriter, Operation *op,
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auto const_op =
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rewriter.create<tosa::ConstOp>(op->getLoc(), const_type, const_attr);
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if (dtype) {
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return rewriter.createOrFold<tosa::CastOp>(
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op->getLoc(), RankedTensorType::get(shape, *dtype), const_op);
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}
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return const_op.getResult();
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}
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@ -198,7 +203,7 @@ std::optional<Value> getConstTensor(PatternRewriter &rewriter, Operation *op,
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template <>
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std::optional<Value> getConstTensor<APInt>(PatternRewriter &rewriter,
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Operation *op, ArrayRef<APInt> vec,
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ArrayRef<int64_t> shape) {
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ArrayRef<int64_t> shape, std::optional<Type> dtype) {
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uint64_t num_total_elements = 1;
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for (int64_t a : shape) {
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num_total_elements *= a;
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@ -215,6 +220,11 @@ std::optional<Value> getConstTensor<APInt>(PatternRewriter &rewriter,
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auto const_op =
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rewriter.create<tosa::ConstOp>(op->getLoc(), const_type, const_attr);
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if (dtype) {
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return rewriter.createOrFold<tosa::CastOp>(
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op->getLoc(), RankedTensorType::get(shape, *dtype), const_op);
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}
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return const_op.getResult();
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}
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@ -222,7 +232,7 @@ std::optional<Value> getConstTensor<APInt>(PatternRewriter &rewriter,
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template <>
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std::optional<Value> getConstTensor<float>(PatternRewriter &rewriter,
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Operation *op, ArrayRef<float> vec,
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ArrayRef<int64_t> shape) {
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ArrayRef<int64_t> shape, std::optional<Type> dtype) {
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uint64_t num_total_elements = 1;
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for (int64_t a : shape) {
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num_total_elements *= a;
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@ -238,6 +248,11 @@ std::optional<Value> getConstTensor<float>(PatternRewriter &rewriter,
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auto const_op =
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rewriter.create<tosa::ConstOp>(op->getLoc(), const_type, const_attr);
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if (dtype) {
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return rewriter.createOrFold<tosa::CastOp>(
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op->getLoc(), RankedTensorType::get(shape, *dtype), const_op);
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}
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return const_op.getResult();
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}
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@ -329,12 +344,14 @@ Value promoteType(PatternRewriter &rewriter, Value input, TensorType outType) {
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template std::optional<Value> getConstTensor<int32_t>(PatternRewriter &,
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Operation *,
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ArrayRef<int32_t> vec,
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ArrayRef<int64_t> shape);
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ArrayRef<int64_t> shape,
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std::optional<Type> dtype);
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template std::optional<Value> getConstTensor<int64_t>(PatternRewriter &,
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Operation *,
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ArrayRef<int64_t> vec,
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ArrayRef<int64_t> shape);
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ArrayRef<int64_t> shape,
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std::optional<Type> dtype);
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LogicalResult getAvgPool2dAccType(PatternRewriter &rewriter, Value input,
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TypeAttr &accType) {
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