================ @@ -0,0 +1,304 @@ +//===- LowerContractionToSMMLAPattern.cpp - Contract to SMMLA ---*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// This file implements lowering patterns from vector.contract to +// SVE I8MM operations. +// +//===--- + +#include "mlir/Dialect/Arith/IR/Arith.h" +#include "mlir/Dialect/ArmSVE/IR/ArmSVEDialect.h" +#include "mlir/Dialect/ArmSVE/Transforms/Transforms.h" +#include "mlir/Dialect/Func/IR/FuncOps.h" +#include "mlir/Dialect/LLVMIR/LLVMDialect.h" +#include "mlir/Dialect/Utils/IndexingUtils.h" +#include "mlir/Dialect/Vector/IR/VectorOps.h" +#include "mlir/IR/AffineMap.h" +#include "mlir/IR/PatternMatch.h" +#include "mlir/Transforms/GreedyPatternRewriteDriver.h" + +#include "mlir/Dialect/UB/IR/UBOps.h" + +#define DEBUG_TYPE "lower-contract-to-arm-sve-i8mm" + +using namespace mlir; +using namespace mlir::arm_sve; + +namespace { +// Check if the given value is a result of the operation `T` (which must be +// sign- or zero- extend) from i8 to i32. Return the value before the extension. +template <typename T> +inline std::enable_if_t<(std::is_base_of_v<arith::ExtSIOp, T> || + std::is_base_of_v<arith::ExtUIOp, T>), + std::optional<Value>> +extractExtOperand(Value v, Type i8Ty, Type i32Ty) { + auto extOp = dyn_cast_or_null<T>(v.getDefiningOp()); + if (!extOp) + return {}; + + auto inOp = extOp.getIn(); + auto inTy = dyn_cast<VectorType>(inOp.getType()); + if (!inTy || inTy.getElementType() != i8Ty) + return {}; + + auto outTy = dyn_cast<VectorType>(extOp.getType()); + if (!outTy || outTy.getElementType() != i32Ty) + return {}; + + return inOp; +} + +// Designate the operation (resp. instruction) used to do sub-tile matrix +// multiplications. +enum class MMLA { + Signed, // smmla + Unsigned, // ummla + Mixed, // usmmla + MixedSwapped // usmmla with LHS and RHS swapped +}; + +// Create the matrix multply and accumulate operation according to `op`. +Value createMMLA(PatternRewriter &rewriter, MMLA op, Location loc, + mlir::VectorType accType, Value acc, Value lhs, Value rhs) { + switch (op) { + case MMLA::Signed: + return rewriter.create<arm_sve::SmmlaOp>(loc, accType, acc, lhs, rhs); + case MMLA::Unsigned: + return rewriter.create<arm_sve::UmmlaOp>(loc, accType, acc, lhs, rhs); + case MMLA::Mixed: + return rewriter.create<arm_sve::UsmmlaOp>(loc, accType, acc, lhs, rhs); + case MMLA::MixedSwapped: + // The accumulator comes transposed and the result will be transposed + // later, so all we have to do here is swap the operands. + return rewriter.create<arm_sve::UsmmlaOp>(loc, accType, acc, rhs, lhs); + } +} + +class LowerContractionToSVEI8MMPattern + : public OpRewritePattern<vector::ContractionOp> { +public: + using OpRewritePattern::OpRewritePattern; + LogicalResult matchAndRewrite(vector::ContractionOp op, + PatternRewriter &rewriter) const override { + + Location loc = op.getLoc(); + mlir::VectorType lhsType = op.getLhsType(); + mlir::VectorType rhsType = op.getRhsType(); + + // For now handle LHS<Mx8> and RHS<8x[N]> - these are the types we + // eventually expect from MMT4D. M and N dimensions must be even and at + // least 2. + if (!lhsType.hasRank() || lhsType.getRank() != 2 || !rhsType.hasRank() || ---------------- banach-space wrote:
IIRC, inputs to `vector.contract` are required to be vectors, hence `lhsType.hasRank()` should always be true, no? https://github.com/llvm/llvm-project/pull/135636 _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
