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1229 lines
49 KiB
C++
1229 lines
49 KiB
C++
//===- WinogradConv2D.cpp - Winograd Conv2D implementation ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Implement Winograd Conv2D algorithm. The implementation is based on the
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// paper: Fast Algorithms for Convolutional Neural Networks
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// (https://arxiv.org/abs/1509.09308)
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Dialect/Affine/IR/AffineOps.h"
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#include "mlir/Dialect/Arith/IR/Arith.h"
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#include "mlir/Dialect/Linalg/IR/Linalg.h"
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#include "mlir/Dialect/Linalg/Utils/Utils.h"
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#include "mlir/Dialect/Tensor/IR/Tensor.h"
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#include "mlir/Dialect/Utils/StaticValueUtils.h"
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#include "llvm/Support/MathExtras.h"
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namespace mlir {
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namespace linalg {
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namespace {
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// clang-format off
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/// Winograd Conv2D uses a minimal 2D filtering algorithm to calculate its
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/// result. The formula of minimal 2D filtering algorithm F(m x m, r x r),
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/// m is the output dimension and r is the filter dimension, is
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///
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/// Y = A^T x [ (G x g x G^T) x (B^T x d x B) ] x A
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///
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/// g is filter and d is input data. We need to prepare 6 constant
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/// transformation matrices, G, G^T, B^T, B, A^T, and A for this formula.
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///
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/// The following tables define these constant transformation matrices for
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/// F(2 x 2, 3 x 3), F(4 x 4, 3 x 3), and F(2 x 2, 5 x 5)
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///
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/// To add more transformation matrices, we need to add the following
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/// items:
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/// 1. Add the constant transformation matrix to the corresponding
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/// G, GT, BT, B, AT, or A array.
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/// 2. Add the corresponding TransformMatrix to the GMatrices, GTMatrices,
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/// BTMatrices, BMatrices, ATMatrices, or AMatrices map.
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/// 3. Add a enum value F_m_r to WinogradConv2DFmr enum.
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///
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constexpr float G_2x2_3x3[] = {
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-1, 0, 0,
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1./2, -1./2, 1./2,
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1./2, 1./2, 1./2,
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0, 0, 1
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};
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constexpr float GT_2x2_3x3[] = {
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-1, 1./2, 1./2, 0,
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0, -1./2, 1./2, 0,
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0, 1./2, 1./2, 1
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};
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constexpr float BT_2x2_3x3[] = {
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-1, 0, 1, 0,
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0, -1, 1, 0,
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0, 1, 1, 0,
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0, -1, 0, 1
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};
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constexpr float B_2x2_3x3[] = {
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-1, 0, 0, 0,
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0, -1, 1, -1,
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1, 1, 1, 0,
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0, 0, 0, 1
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};
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constexpr float AT_2x2_3x3[] = {
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1, 1, 1, 0,
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0, -1, 1, 1
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};
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constexpr float A_2x2_3x3[] = {
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1, 0,
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1, -1,
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1, 1,
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0, 1
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};
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constexpr float G_4x4_3x3[] = {
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1, 0, 0,
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-1./3, 1./3, -1./3,
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-1./3, -1./3, -1./3,
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1./12, -1./6, 1./3,
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1./12, 1./6, 1./3,
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0, 0, 1
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};
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constexpr float GT_4x4_3x3[] = {
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1, -1./3, -1./3, 1./12, 1./12, 0,
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0, 1./3, -1./3, -1./6, 1./6, 0,
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0, -1./3, -1./3, 1./3, 1./3, 1
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};
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constexpr float BT_4x4_3x3[] = {
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1./4, 0, -5./16, 0, 1./16, 0,
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0, 1./4, -1./4, -1./16, 1./16, 0,
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0, -1./4, -1./4, 1./16, 1./16, 0,
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0, 1./4, -1./8, -1./4, 1./8, 0,
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0, -1./4, -1./8, 1./4, 1./8, 0,
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0, 1./4, 0, -5./16, 0, 1./16
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};
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constexpr float B_4x4_3x3[] = {
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1./4, 0, 0, 0, 0, 0,
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0, 1./4, -1./4, 1./4, -1./4, 1./4,
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-5./16, -1./4, -1./4, -1./8, -1./8, 0,
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0, -1./16, 1./16, -1./4, 1./4, -5./16,
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1./16, 1./16, 1./16, 1./8, 1./8, 0,
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0, 0, 0, 0, 0, 1./16
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};
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constexpr float AT_4x4_3x3[] = {
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1./8, 1./4, 1./4, 1./8, 1./8, 0,
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0, -1./4, 1./4, -1./4, 1./4, 0,
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0, 1./4, 1./4, 1./2, 1./2, 0,
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0, -1./4, 1./4, -1, 1, 1./2
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};
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constexpr float A_4x4_3x3[] = {
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1./8, 0, 0, 0,
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1./4, -1./4, 1./4, -1./4,
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1./4, 1./4, 1./4, 1./4,
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1./8, -1./4, 1./2, -1,
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1./8, 1./4, 1./2, 1,
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0, 0, 0, 1./2
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};
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constexpr float G_2x2_5x5[] = {
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1, 0, 0, 0, 0,
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1./6, -1./6, 1./6, -1./6, 1./6,
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-1./6, -1./6, -1./6, -1./6, -1./6,
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-4./15, 2./15, -1./15, 1./30, -1./60,
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1./60, 1./30, 1./15, 2./15, 4./15,
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0, 0, 0, 0, 1
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};
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constexpr float GT_2x2_5x5[] = {
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1, 1./6, -1./6, -4./15, 1./60, 0,
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0, -1./6, -1./6, 2./15, 1./30, 0,
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0, 1./6, -1./6, -1./15, 1./15, 0,
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0, -1./6, -1./6, 1./30, 2./15, 0,
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0, 1./6, -1./6, -1./60, 4./15, 1
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};
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constexpr float BT_2x2_5x5[] = {
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1./8, 3./16, -1./4, -3./16, 1./8, 0,
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0, 1./8, 1./16, -5./16, 1./8, 0,
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0, -1./8, -5./16, -1./16, 1./8, 0,
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0, 1./4, -1./8, -1./4, 1./8, 0,
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0, -1./8, -1./4, 1./8, 1./4, 0,
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0, 1./8, 3./16, -1./4, -3./16, 1./8
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};
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constexpr float B_2x2_5x5[] = {
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1./8, 0, 0, 0, 0, 0,
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3./16, 1./8, -1./8, 1./4, -1./8, 1./8,
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-1./4, 1./16, -5./16, -1./8, -1./4, 3./16,
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-3./16, -5./16, -1./16, -1./4, 1./8, -1./4,
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1./8, 1./8, 1./8, 1./8, 1./4, -3./16,
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0, 0, 0, 0, 0, 1./8
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};
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constexpr float AT_2x2_5x5[] = {
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1./2, 1, 1, 2, 1, 0,
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0, -1, 1, -1, 2, 1./2
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};
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constexpr float A_2x2_5x5[] = {
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1./2, 0,
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1, -1,
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1, 1,
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2, -1,
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1, 2,
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0, 1./2
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};
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// clang-format on
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/// Structure to keep information of constant transform matrices.
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struct TransformMatrix {
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TransformMatrix(ArrayRef<float> table, int64_t rows, int64_t cols,
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int64_t scalarFactor = 1)
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: table(table), rows(rows), cols(cols), scalarFactor(scalarFactor) {}
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ArrayRef<float> table;
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int64_t rows;
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int64_t cols;
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int64_t scalarFactor;
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};
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/// Utility function to convert constant array to arith.constant Value.
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Value create2DTransformMatrix(OpBuilder &builder, Location loc,
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TransformMatrix transform, Type type) {
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assert(transform.table.size() ==
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static_cast<size_t>(transform.rows * transform.cols));
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assert(type.isFloat() && "Only floats are supported by Winograd");
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ArrayRef<float> constVec(transform.table.data(),
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transform.rows * transform.cols);
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auto constAttrVec =
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llvm::map_to_vector<>(constVec, [&](const float v) -> Attribute {
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return builder.getFloatAttr(type, v);
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});
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SmallVector<int64_t, 2> shape{transform.rows, transform.cols};
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return arith::ConstantOp::create(
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builder, loc,
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DenseFPElementsAttr::get(RankedTensorType::get(shape, type),
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constAttrVec));
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}
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/// Extract height x width data from 4D tensors.
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Value extract2DDataFrom4D(OpBuilder &builder, Location loc, Value source,
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Value loopNorFIndex, Value loopCorFIndex,
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Value heightOffset, Value widthOffset,
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int64_t extractHeight, int64_t extractWidth,
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int64_t loopNorFIdx, int64_t loopCorFIdx,
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int64_t heightIdx, int64_t widthIdx) {
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auto sourceType = cast<ShapedType>(source.getType());
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Type elementType = sourceType.getElementType();
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int64_t srcSize = sourceType.getRank();
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auto oneIndex = builder.getIndexAttr(1);
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SmallVector<OpFoldResult> offsets;
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offsets.resize(srcSize);
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offsets[loopNorFIdx] = loopNorFIndex;
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offsets[loopCorFIdx] = loopCorFIndex;
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offsets[heightIdx] = heightOffset;
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offsets[widthIdx] = widthOffset;
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SmallVector<OpFoldResult> sizes(srcSize, oneIndex);
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sizes[heightIdx] = builder.getIndexAttr(extractHeight);
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sizes[widthIdx] = builder.getIndexAttr(extractWidth);
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SmallVector<OpFoldResult> strides(srcSize, oneIndex);
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auto extractFilterType =
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RankedTensorType::get({extractHeight, extractWidth}, elementType);
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auto extractFilterOp = tensor::ExtractSliceOp::create(
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builder, loc, extractFilterType, source, offsets, sizes, strides);
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return extractFilterOp;
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}
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/// Extract height x width data from 6D tensors.
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Value extract2DDataFrom6D(OpBuilder &builder, Location loc, Value source,
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Value tileHIndex, Value tileWIndex,
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Value loopNorFIndex, Value loopCorFIndex,
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int64_t tileHIdx, int64_t tileWIdx,
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int64_t loopNorFIdx, int64_t loopCorFIdx,
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int64_t heightIdx, int64_t widthIdx) {
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auto sourceType = cast<ShapedType>(source.getType());
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Type elementType = sourceType.getElementType();
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auto sourceShape = sourceType.getShape();
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int64_t srcSize = sourceType.getRank();
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int64_t height = sourceShape[heightIdx];
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int64_t width = sourceShape[widthIdx];
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auto zeroIndex = builder.getIndexAttr(0);
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auto oneIndex = builder.getIndexAttr(1);
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SmallVector<OpFoldResult> offsets(srcSize, zeroIndex);
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offsets.resize(srcSize);
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offsets[tileHIdx] = tileHIndex;
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offsets[tileWIdx] = tileWIndex;
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offsets[loopNorFIdx] = loopNorFIndex;
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offsets[loopCorFIdx] = loopCorFIndex;
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SmallVector<OpFoldResult> sizes(srcSize, oneIndex);
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sizes[heightIdx] = builder.getIndexAttr(height);
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sizes[widthIdx] = builder.getIndexAttr(width);
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SmallVector<OpFoldResult> strides(srcSize, oneIndex);
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auto extractFilterType = RankedTensorType::get({height, width}, elementType);
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auto extractFilterOp = tensor::ExtractSliceOp::create(
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builder, loc, extractFilterType, source, offsets, sizes, strides);
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return extractFilterOp;
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}
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/// Insert transformed height x width data to 4D tensors which it is
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/// extracted from.
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Value insert2DDataTo4D(OpBuilder &builder, Location loc, Value source,
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Value dest, Value loopNorFIndex, Value loopCorFIndex,
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Value heightOffset, Value widthOffset, int64_t height,
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int64_t width, int64_t loopNorFIdx, int64_t loopCorFIdx,
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int64_t heightIdx, int64_t widthIdx) {
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int64_t destSize = cast<ShapedType>(dest.getType()).getRank();
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auto oneIndex = builder.getIndexAttr(1);
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SmallVector<OpFoldResult> retOffsets;
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retOffsets.resize(destSize);
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retOffsets[loopNorFIdx] = loopNorFIndex;
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retOffsets[loopCorFIdx] = loopCorFIndex;
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retOffsets[heightIdx] = heightOffset;
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retOffsets[widthIdx] = widthOffset;
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SmallVector<OpFoldResult> retSizes(destSize, oneIndex);
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retSizes[heightIdx] = builder.getIndexAttr(height);
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retSizes[widthIdx] = builder.getIndexAttr(width);
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SmallVector<OpFoldResult> strides(destSize, oneIndex);
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auto insertSliceOp = tensor::InsertSliceOp::create(
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builder, loc, source, dest, retOffsets, retSizes, strides);
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return insertSliceOp;
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}
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/// Insert transformed height x width data to 6D tensors which it is
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/// extracted from.
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Value insert2DDataTo6D(OpBuilder &builder, Location loc, Value source,
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Value dest, Value tileHIndex, Value tileWIndex,
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Value loopNorFIndex, Value loopCorFIndex, int64_t height,
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int64_t width, int64_t tileHIdx, int64_t tileWIdx,
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int64_t loopNorFIdx, int64_t loopCorFIdx,
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int64_t heightIdx, int64_t widthIdx) {
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int64_t destSize = cast<ShapedType>(dest.getType()).getRank();
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auto zeroIndex = builder.getIndexAttr(0);
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auto oneIndex = builder.getIndexAttr(1);
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SmallVector<OpFoldResult> retOffsets(destSize, zeroIndex);
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retOffsets.resize(destSize);
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retOffsets[tileHIdx] = tileHIndex;
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retOffsets[tileWIdx] = tileWIndex;
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retOffsets[loopNorFIdx] = loopNorFIndex;
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retOffsets[loopCorFIdx] = loopCorFIndex;
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SmallVector<OpFoldResult> retSizes(destSize, oneIndex);
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retSizes[heightIdx] = builder.getIndexAttr(height);
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retSizes[widthIdx] = builder.getIndexAttr(width);
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SmallVector<OpFoldResult> strides(destSize, oneIndex);
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auto insertSliceOp = tensor::InsertSliceOp::create(
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builder, loc, source, dest, retOffsets, retSizes, strides);
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return insertSliceOp;
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}
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/// This function transforms the filter. The data layout of the filter is FHWC.
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/// The transformation matrix is 2-dimension. We need to extract H x W from
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/// FHWC first. We need to generate 2 levels of loops to iterate on F and C.
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/// After the transformation, we get
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///
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/// scf.for %f = lo_f to hi_f step 1
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/// scf.for %c = lo_c to hi_c step 1
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/// %extracted = extract filter<h x w> from filter<f x h x w x c>
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/// %ret = linalg.matmul G, %extracted
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/// %ret = linalg.matmul %ret, GT
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/// %inserted = insert %ret into filter<h x w x c x f>
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Value filterTransform(RewriterBase &rewriter, Location loc, Value filter,
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Value retValue, WinogradConv2DFmr fmr,
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bool leftTransform = true, bool rightTransform = true) {
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// Map from (m, r) to G transform matrix.
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static const llvm::SmallDenseMap<WinogradConv2DFmr, TransformMatrix>
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GMatrices = {
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{WinogradConv2DFmr::F_2_3, TransformMatrix(G_2x2_3x3, 4, 3)},
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{WinogradConv2DFmr::F_4_3, TransformMatrix(G_4x4_3x3, 6, 3)},
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{WinogradConv2DFmr::F_2_5, TransformMatrix(G_2x2_5x5, 6, 5)},
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};
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// Map from (m, r) to GT transform matrix.
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static const llvm::SmallDenseMap<WinogradConv2DFmr, TransformMatrix>
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GTMatrices = {
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{WinogradConv2DFmr::F_2_3, TransformMatrix(GT_2x2_3x3, 3, 4)},
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{WinogradConv2DFmr::F_4_3, TransformMatrix(GT_4x4_3x3, 3, 6)},
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{WinogradConv2DFmr::F_2_5, TransformMatrix(GT_2x2_5x5, 5, 6)},
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};
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auto filterType = cast<ShapedType>(filter.getType());
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Type elementType = filterType.getElementType();
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auto filterShape = filterType.getShape(); // F, H, W, C
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int64_t filterF = filterShape[0];
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int64_t filterH = filterShape[1];
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int64_t filterW = filterShape[2];
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int64_t filterC = filterShape[3];
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int64_t m, r;
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std::tie(m, r) = getFmrFromWinogradConv2DFmr(fmr);
|
|
if (filterH != r && filterH != 1)
|
|
return Value();
|
|
if (filterW != r && filterW != 1)
|
|
return Value();
|
|
|
|
Value zeroIdx = arith::ConstantIndexOp::create(rewriter, loc, 0);
|
|
auto buildBody = [&](OpBuilder &builder, Location loc, ValueRange ivs,
|
|
ValueRange args) -> scf::ValueVector {
|
|
Value FIter = ivs[0];
|
|
Value CIter = ivs[1];
|
|
|
|
// Extract (H, W) from (F, H, W, C).
|
|
auto extractFilter =
|
|
extract2DDataFrom4D(builder, loc, filter, FIter, CIter, zeroIdx,
|
|
zeroIdx, filterH, filterW, /*loopNorFIdx=*/0,
|
|
/*loopCorFIdx=*/3, /*heightIdx=*/1, /*widthIdx=*/2);
|
|
|
|
int64_t retRows = 1;
|
|
Value matmulRetValue = extractFilter;
|
|
Value zero = arith::ConstantOp::create(builder, loc,
|
|
rewriter.getZeroAttr(elementType));
|
|
if (leftTransform) {
|
|
// Get constant transform matrix G.
|
|
auto it = GMatrices.find(fmr);
|
|
if (it == GMatrices.end())
|
|
return {};
|
|
const TransformMatrix &GMatrix = it->second;
|
|
|
|
retRows = GMatrix.rows;
|
|
auto matmulType = RankedTensorType::get({retRows, filterW}, elementType);
|
|
auto empty = tensor::EmptyOp::create(builder, loc, matmulType.getShape(),
|
|
elementType)
|
|
.getResult();
|
|
auto init =
|
|
linalg::FillOp::create(builder, loc, zero, empty).getResult(0);
|
|
|
|
Value G = create2DTransformMatrix(builder, loc, GMatrix, elementType);
|
|
// Multiply G x g.
|
|
auto matmulOp = linalg::MatmulOp::create(builder, loc, matmulType,
|
|
ValueRange{G, extractFilter},
|
|
ValueRange{init});
|
|
matmulRetValue = matmulOp.getResult(0);
|
|
}
|
|
|
|
if (rightTransform) {
|
|
// Get constant transform matrix GT.
|
|
auto it = GTMatrices.find(fmr);
|
|
if (it == GTMatrices.end())
|
|
return {};
|
|
const TransformMatrix >Matrix = it->second;
|
|
|
|
auto matmulType =
|
|
RankedTensorType::get({retRows, GTMatrix.cols}, elementType);
|
|
auto empty = tensor::EmptyOp::create(builder, loc, matmulType.getShape(),
|
|
elementType)
|
|
.getResult();
|
|
auto init =
|
|
linalg::FillOp::create(builder, loc, zero, empty).getResult(0);
|
|
|
|
Value GT = create2DTransformMatrix(builder, loc, GTMatrix, elementType);
|
|
// Multiply u = (G x g) x GT.
|
|
auto matmulOp = linalg::MatmulOp::create(builder, loc, matmulType,
|
|
ValueRange{matmulRetValue, GT},
|
|
ValueRange{init});
|
|
matmulRetValue = matmulOp.getResult(0);
|
|
}
|
|
|
|
// Insert (H, W) to (H, W, C, F).
|
|
int64_t retHeight = leftTransform ? m + r - 1 : 1;
|
|
int64_t retWidth = rightTransform ? m + r - 1 : 1;
|
|
|
|
auto insertSliceOp =
|
|
insert2DDataTo4D(builder, loc, matmulRetValue, args[0], FIter, CIter,
|
|
zeroIdx, zeroIdx, retHeight, retWidth,
|
|
/*loopNorFIdx=*/3, /*loopCorFIdx=*/2,
|
|
/*heightIdx=*/0, /*widthIdx=*/1);
|
|
|
|
return {insertSliceOp};
|
|
};
|
|
|
|
auto fUpperBound = arith::ConstantIndexOp::create(rewriter, loc, filterF);
|
|
auto cUpperBound = arith::ConstantIndexOp::create(rewriter, loc, filterC);
|
|
auto oneStep = arith::ConstantIndexOp::create(rewriter, loc, 1);
|
|
scf::LoopNest loops = scf::buildLoopNest(
|
|
rewriter, loc, {zeroIdx, zeroIdx}, {fUpperBound, cUpperBound},
|
|
{oneStep, oneStep}, {retValue}, buildBody);
|
|
return loops.results[0];
|
|
}
|
|
|
|
/// This function transforms the input. The data layout of the input is NHWC.
|
|
/// The transformation matrix is 2-dimension. We need to extract H x W from
|
|
/// NHWC first. We need to generate 2 levels of loops to iterate on N and C.
|
|
/// After the transformation, we get
|
|
///
|
|
/// scf.for %h = 0 to tileH step 1
|
|
/// scf.for %w = 0 to tileW step 1
|
|
/// scf.for %n = 0 to N step 1
|
|
/// scf.for %c = 0 to C step 1
|
|
/// %extracted = extract %extracted<alphaH x alphaW> from
|
|
/// %input<N x H x W x C>
|
|
/// at [%n, (%h x m), (%w x m), %c]
|
|
/// %ret = linalg.matmul BT, %extracted
|
|
/// %ret = linalg.matmul %ret, B
|
|
/// %inserted = insert %ret<alphaH x alphaW> into
|
|
/// %output<alphaH x alphaW x tileH x tileW x N x C>
|
|
/// at [0, 0, %h, %w, %n, %c]
|
|
Value inputTransform(RewriterBase &rewriter, Location loc, Value input,
|
|
Value retValue, WinogradConv2DFmr fmr,
|
|
bool leftTransform = true, bool rightTransform = true) {
|
|
// Map from (m, r) to BT transform matrix.
|
|
static const llvm::SmallDenseMap<WinogradConv2DFmr, TransformMatrix>
|
|
BTMatrices = {
|
|
{WinogradConv2DFmr::F_2_3, TransformMatrix(BT_2x2_3x3, 4, 4)},
|
|
{WinogradConv2DFmr::F_4_3, TransformMatrix(BT_4x4_3x3, 6, 6)},
|
|
{WinogradConv2DFmr::F_2_5, TransformMatrix(BT_2x2_5x5, 6, 6)},
|
|
};
|
|
|
|
// Map from (m, r) to B transform matrix.
|
|
static const llvm::SmallDenseMap<WinogradConv2DFmr, TransformMatrix>
|
|
BMatrices = {
|
|
{WinogradConv2DFmr::F_2_3, TransformMatrix(B_2x2_3x3, 4, 4)},
|
|
{WinogradConv2DFmr::F_4_3, TransformMatrix(B_4x4_3x3, 6, 6)},
|
|
{WinogradConv2DFmr::F_2_5, TransformMatrix(B_2x2_5x5, 6, 6)},
|
|
};
|
|
|
|
int64_t m, r;
|
|
std::tie(m, r) = getFmrFromWinogradConv2DFmr(fmr);
|
|
auto inputType = cast<ShapedType>(input.getType());
|
|
Type elementType = inputType.getElementType();
|
|
auto inputShape = inputType.getShape(); // N, H, W, C
|
|
int64_t inputN = inputShape[0];
|
|
int64_t inputC = inputShape[3];
|
|
auto valueType = cast<ShapedType>(retValue.getType());
|
|
auto valueShape = valueType.getShape(); // alphaH, alphaW, HTile, WTile, N, C
|
|
int64_t tileH = valueShape[2];
|
|
int64_t tileW = valueShape[3];
|
|
int64_t alphaH = leftTransform ? m + r - 1 : 1;
|
|
int64_t alphaW = rightTransform ? m + r - 1 : 1;
|
|
|
|
auto buildBody = [&](OpBuilder &builder, Location loc, ValueRange ivs,
|
|
ValueRange args) -> scf::ValueVector {
|
|
Value tileHIter = ivs[0];
|
|
Value tileWIter = ivs[1];
|
|
Value NIter = ivs[2];
|
|
Value CIter = ivs[3];
|
|
|
|
auto *context = builder.getContext();
|
|
|
|
auto identityAffineMap = rewriter.getMultiDimIdentityMap(1);
|
|
auto affineMap =
|
|
AffineMap::get(1, 0, {builder.getAffineDimExpr(0) * m}, context);
|
|
Value heightOffset = affine::AffineApplyOp::create(
|
|
builder, loc, leftTransform ? affineMap : identityAffineMap, tileHIter);
|
|
Value widthOffset = affine::AffineApplyOp::create(
|
|
builder, loc, rightTransform ? affineMap : identityAffineMap,
|
|
tileWIter);
|
|
|
|
// Extract (H, W) from (N, H, W, C).
|
|
auto extractInput =
|
|
extract2DDataFrom4D(builder, loc, input, NIter, CIter, heightOffset,
|
|
widthOffset, alphaH, alphaW, /*loopNorFIdx=*/0,
|
|
/*loopCorFIdx=*/3, /*heightIdx=*/1, /*widthIdx=*/2);
|
|
|
|
int64_t retRows = 1;
|
|
int64_t retCols = 1;
|
|
Value matmulRetValue = extractInput;
|
|
Value zero = arith::ConstantOp::create(builder, loc,
|
|
rewriter.getZeroAttr(elementType));
|
|
if (leftTransform) {
|
|
// Get constant transform matrix BT.
|
|
auto it = BTMatrices.find(fmr);
|
|
if (it == BTMatrices.end())
|
|
return {};
|
|
const TransformMatrix &BTMatrix = it->second;
|
|
|
|
retRows = BTMatrix.rows;
|
|
auto matmulType = RankedTensorType::get({retRows, alphaW}, elementType);
|
|
auto empty = tensor::EmptyOp::create(builder, loc, matmulType.getShape(),
|
|
elementType)
|
|
.getResult();
|
|
auto init =
|
|
linalg::FillOp::create(builder, loc, zero, empty).getResult(0);
|
|
|
|
Value BT = create2DTransformMatrix(builder, loc, BTMatrix, elementType);
|
|
// Multiply BT x d.
|
|
auto matmulOp = linalg::MatmulOp::create(builder, loc, matmulType,
|
|
ValueRange{BT, matmulRetValue},
|
|
ValueRange{init});
|
|
matmulRetValue = matmulOp.getResult(0);
|
|
}
|
|
|
|
if (rightTransform) {
|
|
// Get constant transform matrix B.
|
|
auto it = BMatrices.find(fmr);
|
|
if (it == BMatrices.end())
|
|
return {};
|
|
const TransformMatrix &BMatrix = it->second;
|
|
|
|
retCols = BMatrix.cols;
|
|
auto matmulType = RankedTensorType::get({retRows, retCols}, elementType);
|
|
auto empty = tensor::EmptyOp::create(builder, loc, matmulType.getShape(),
|
|
elementType)
|
|
.getResult();
|
|
auto init =
|
|
linalg::FillOp::create(builder, loc, zero, empty).getResult(0);
|
|
Value B = create2DTransformMatrix(builder, loc, BMatrix, elementType);
|
|
// Multiply v = (BT x d) x B.
|
|
auto matmulOp = linalg::MatmulOp::create(builder, loc, matmulType,
|
|
ValueRange{matmulRetValue, B},
|
|
ValueRange{init});
|
|
matmulRetValue = matmulOp.getResult(0);
|
|
}
|
|
|
|
// Insert (H, W) to (H, W, tileH, tileW, N, C).
|
|
auto combinedVal = insert2DDataTo6D(
|
|
builder, loc, matmulRetValue, args[0], tileHIter, tileWIter, NIter,
|
|
CIter, retRows, retCols, 2, 3, /*loopNorFIdx=*/4, /*loopCorFIdx=*/5,
|
|
/*heightIdx=*/0, /*widthIdx=*/1);
|
|
|
|
return {combinedVal};
|
|
};
|
|
|
|
auto zeroIdx = arith::ConstantIndexOp::create(rewriter, loc, 0);
|
|
auto tileHBound = arith::ConstantIndexOp::create(rewriter, loc, tileH);
|
|
auto tileWBound = arith::ConstantIndexOp::create(rewriter, loc, tileW);
|
|
auto nUpperBound = arith::ConstantIndexOp::create(rewriter, loc, inputN);
|
|
auto cUpperBound = arith::ConstantIndexOp::create(rewriter, loc, inputC);
|
|
auto oneStep = arith::ConstantIndexOp::create(rewriter, loc, 1);
|
|
scf::LoopNest loops = scf::buildLoopNest(
|
|
rewriter, loc, {zeroIdx, zeroIdx, zeroIdx, zeroIdx},
|
|
{tileHBound, tileWBound, nUpperBound, cUpperBound},
|
|
{oneStep, oneStep, oneStep, oneStep}, {retValue}, buildBody);
|
|
return loops.results[0];
|
|
}
|
|
|
|
/// This function generates linalg.batch_matmul to multiply input with filter.
|
|
/// linalg.batch_matmul only supports 3-dimensional inputs. We can treat
|
|
/// tileH x tileW x H x W data as the 1-dimensional data array. That is to
|
|
/// convert [tileH, tileW, H, W, N, C] to [tileH x tileW x H x W, N, C]. In this
|
|
/// way, we can convert 6-dimensional inputs to 3-dimensional representation
|
|
/// that is suitable for linalg.batch_matmul.
|
|
///
|
|
/// Batched matmul will do the matrix multiply with the reduction on channel.
|
|
///
|
|
/// We get
|
|
///
|
|
/// %collapsed_input = tensor.collapse_shape %input
|
|
/// %collapsed_filter = tensor.collapse_shape %filter
|
|
/// %ret = linalg.batch_matmul %collapsed_input, %collapsed_filter
|
|
/// %expanded_ret = tensor.expand_shape %ret
|
|
///
|
|
/// After this function, we get return value with data layout
|
|
/// (tileH, tileW, H, W, N, F).
|
|
static Value matrixMultiply(RewriterBase &rewriter, Location loc,
|
|
Value transformedFilter, Value transformedInput,
|
|
Type outputElementType) {
|
|
// Convert (alphaH, alphaW, C, F) to (alphaH x alphaW, C, F) for filter.
|
|
auto filterType = cast<ShapedType>(transformedFilter.getType());
|
|
assert(filterType.hasStaticShape() && "only support static shapes.");
|
|
ArrayRef<int64_t> filterShape = filterType.getShape();
|
|
Type filterElementType = filterType.getElementType();
|
|
auto filterReassocType = RankedTensorType::get(
|
|
{filterShape[0] * filterShape[1], filterShape[2], filterShape[3]},
|
|
filterElementType);
|
|
SmallVector<ReassociationIndices> filterReassoc = {{0, 1}, {2}, {3}};
|
|
Value collapseFilter = tensor::CollapseShapeOp::create(
|
|
rewriter, loc, filterReassocType, transformedFilter, filterReassoc);
|
|
|
|
// Convert (alphaH, alphaW, tileH, tileW, N, C) to
|
|
// (alphaH x alphaW, tileH x tileW x N, C) for input.
|
|
auto inputType = cast<ShapedType>(transformedInput.getType());
|
|
assert(inputType.hasStaticShape() && "only support static shapes.");
|
|
ArrayRef<int64_t> inputShape = inputType.getShape();
|
|
Type inputElementType = inputType.getElementType();
|
|
auto inputReassocType = RankedTensorType::get(
|
|
{inputShape[0] * inputShape[1],
|
|
inputShape[2] * inputShape[3] * inputShape[4], inputShape[5]},
|
|
inputElementType);
|
|
SmallVector<ReassociationIndices> inputReassoc = {{0, 1}, {2, 3, 4}, {5}};
|
|
Value collapseInput = tensor::CollapseShapeOp::create(
|
|
rewriter, loc, inputReassocType, transformedInput, inputReassoc);
|
|
|
|
// Batched matrix multiply.
|
|
auto matmulType = RankedTensorType::get(
|
|
{inputShape[0] * inputShape[1],
|
|
inputShape[2] * inputShape[3] * inputShape[4], filterShape[3]},
|
|
outputElementType);
|
|
Value empty = tensor::EmptyOp::create(rewriter, loc, matmulType.getShape(),
|
|
outputElementType)
|
|
.getResult();
|
|
Value zero = arith::ConstantOp::create(
|
|
rewriter, loc, rewriter.getZeroAttr(outputElementType));
|
|
Value init = linalg::FillOp::create(rewriter, loc, zero, empty).getResult(0);
|
|
|
|
auto matmulOp = linalg::BatchMatmulOp::create(
|
|
rewriter, loc, matmulType, ValueRange({collapseInput, collapseFilter}),
|
|
ValueRange{init});
|
|
|
|
// The result shape of batch matmul is (alphaH x alphaW, tileH x tileW x N, F)
|
|
// Expand matmul result to (alphaH, alphaW, tileH, tileW, N, F).
|
|
SmallVector<ReassociationIndices> outputReassoc = {{0, 1}, {2, 3, 4}, {5}};
|
|
auto outputReassocType =
|
|
RankedTensorType::get({inputShape[0], inputShape[1], inputShape[2],
|
|
inputShape[3], inputShape[4], filterShape[3]},
|
|
outputElementType);
|
|
auto expandOutput = tensor::ExpandShapeOp::create(
|
|
rewriter, loc, outputReassocType, matmulOp.getResult(0), outputReassoc);
|
|
return expandOutput;
|
|
}
|
|
|
|
/// This function transforms the output. The data layout of the output is HWNF.
|
|
/// The transformation matrix is 2-dimension. We need to extract H x W from
|
|
/// HWNF first. We need to generate 2 levels of loops to iterate on N and F.
|
|
/// After the transformation, we get
|
|
///
|
|
/// scf.for %h = 0 to tileH step 1
|
|
/// scf.for %w = 0 to tileW step 1
|
|
/// scf.for %n = 0 to N step 1
|
|
/// scf.for %f = 0 to F step 1
|
|
/// %extracted = extract %extracted<alphaH x alphaW> from
|
|
/// %input<alphaH x alphaW x tileH x tileW x N x F>
|
|
/// at [0, 0, %h, %w, %n, %f]
|
|
/// %ret = linalg.matmul AT, %extracted
|
|
/// %ret = linalg.matmul %ret, A
|
|
/// %inserted = insert %ret<alphaH x alphaW> into
|
|
/// output<N x H x W x F>
|
|
/// at [%n, (%h x m), (%w x m), %f]
|
|
Value outputTransform(RewriterBase &rewriter, Location loc, Value value,
|
|
Value output, WinogradConv2DFmr fmr,
|
|
bool leftTransform = true, bool rightTransform = true) {
|
|
// Map from (m, r) to AT transform matrix.
|
|
static const llvm::SmallDenseMap<WinogradConv2DFmr, TransformMatrix>
|
|
ATMatrices = {
|
|
{WinogradConv2DFmr::F_2_3, TransformMatrix(AT_2x2_3x3, 2, 4)},
|
|
{WinogradConv2DFmr::F_4_3, TransformMatrix(AT_4x4_3x3, 4, 6, 32)},
|
|
{WinogradConv2DFmr::F_2_5, TransformMatrix(AT_2x2_5x5, 2, 6, 16)},
|
|
};
|
|
|
|
// Map from (m, r) to A transform matrix.
|
|
static const llvm::SmallDenseMap<WinogradConv2DFmr, TransformMatrix>
|
|
AMatrices = {
|
|
{WinogradConv2DFmr::F_2_3, TransformMatrix(A_2x2_3x3, 4, 2)},
|
|
{WinogradConv2DFmr::F_4_3, TransformMatrix(A_4x4_3x3, 6, 4, 32)},
|
|
{WinogradConv2DFmr::F_2_5, TransformMatrix(A_2x2_5x5, 6, 2, 16)},
|
|
};
|
|
|
|
int64_t m, r;
|
|
std::tie(m, r) = getFmrFromWinogradConv2DFmr(fmr);
|
|
auto valueType = cast<ShapedType>(value.getType());
|
|
Type elementType = valueType.getElementType();
|
|
auto valueShape = valueType.getShape(); // H, W, TileH, TileW, N, F
|
|
int64_t valueH = valueShape[0];
|
|
int64_t valueW = valueShape[1];
|
|
int64_t valueN = valueShape[4];
|
|
int64_t valueF = valueShape[5];
|
|
int64_t alphaH = leftTransform ? m + r - 1 : 1;
|
|
int64_t alphaW = rightTransform ? m + r - 1 : 1;
|
|
|
|
if (valueH != alphaH && valueH != 1)
|
|
return Value();
|
|
if (valueW != alphaW && valueW != 1)
|
|
return Value();
|
|
|
|
auto buildBody = [&](OpBuilder &builder, Location loc, ValueRange ivs,
|
|
ValueRange args) -> scf::ValueVector {
|
|
auto *context = builder.getContext();
|
|
Value tileHIter = ivs[0];
|
|
Value tileWIter = ivs[1];
|
|
Value NIter = ivs[2];
|
|
Value FIter = ivs[3];
|
|
|
|
// Extract (H, W) from (H, W, tileH, tileW, N, F).
|
|
auto extractValue =
|
|
extract2DDataFrom6D(builder, loc, value, tileHIter, tileWIter, NIter,
|
|
FIter, 2, 3, /*loopNorFIdx=*/4,
|
|
/*loopCorFIdx=*/5, /*heightIdx=*/0, /*widthIdx=*/1);
|
|
|
|
const TransformMatrix &AMatrix = AMatrices.at(fmr);
|
|
const TransformMatrix &ATMatrix = ATMatrices.at(fmr);
|
|
int64_t scalarFactor = (rightTransform ? AMatrix.scalarFactor : 1) *
|
|
(leftTransform ? ATMatrix.scalarFactor : 1);
|
|
int64_t retCols = rightTransform ? AMatrix.cols : 1;
|
|
int64_t retRows = leftTransform ? ATMatrix.rows : 1;
|
|
|
|
Value matmulRetValue = extractValue;
|
|
Value zero = arith::ConstantOp::create(builder, loc,
|
|
rewriter.getZeroAttr(elementType));
|
|
|
|
auto identityAffineMap = rewriter.getMultiDimIdentityMap(1);
|
|
auto affineMap =
|
|
AffineMap::get(1, 0, {builder.getAffineDimExpr(0) * m}, context);
|
|
Value heightOffset = affine::AffineApplyOp::create(
|
|
builder, loc, leftTransform ? affineMap : identityAffineMap, tileHIter);
|
|
Value widthOffset = affine::AffineApplyOp::create(
|
|
builder, loc, rightTransform ? affineMap : identityAffineMap,
|
|
tileWIter);
|
|
|
|
Value outInitVal =
|
|
extract2DDataFrom4D(builder, loc, args[0], NIter, FIter, heightOffset,
|
|
widthOffset, retRows, retCols,
|
|
/*loopNorFIdx=*/0,
|
|
/*loopCorFIdx=*/3, /*heightIdx=*/1,
|
|
/*widthIdx=*/2);
|
|
if (leftTransform) {
|
|
auto matmulType = RankedTensorType::get({retRows, valueW}, elementType);
|
|
Value init = outInitVal;
|
|
if (rightTransform || scalarFactor != 1) {
|
|
auto empty = tensor::EmptyOp::create(builder, loc,
|
|
matmulType.getShape(), elementType)
|
|
.getResult();
|
|
init = linalg::FillOp::create(builder, loc, zero, empty).getResult(0);
|
|
}
|
|
|
|
Value AT = create2DTransformMatrix(builder, loc, ATMatrix, elementType);
|
|
// Multiply AT x m.
|
|
auto matmulOp = linalg::MatmulOp::create(builder, loc, matmulType,
|
|
ValueRange{AT, matmulRetValue},
|
|
ValueRange{init});
|
|
matmulRetValue = matmulOp.getResult(0);
|
|
}
|
|
|
|
if (rightTransform) {
|
|
auto matmulType =
|
|
RankedTensorType::get({retRows, AMatrix.cols}, elementType);
|
|
Value init = outInitVal;
|
|
if (scalarFactor != 1) {
|
|
auto empty = tensor::EmptyOp::create(builder, loc,
|
|
matmulType.getShape(), elementType)
|
|
.getResult();
|
|
init = linalg::FillOp::create(builder, loc, zero, empty).getResult(0);
|
|
}
|
|
|
|
Value A = create2DTransformMatrix(builder, loc, AMatrix, elementType);
|
|
// Multiply y = (AT x m) x A.
|
|
auto matmulOp = linalg::MatmulOp::create(builder, loc, matmulType,
|
|
ValueRange{matmulRetValue, A},
|
|
ValueRange{init});
|
|
matmulRetValue = matmulOp.getResult(0);
|
|
}
|
|
|
|
if (scalarFactor != 1) {
|
|
// Multiply by scalar factor and add outInitVal.
|
|
Value scalarFactorValue = arith::ConstantOp::create(
|
|
builder, loc, FloatAttr::get(elementType, scalarFactor));
|
|
auto matmulType = RankedTensorType::get({retRows, retCols}, elementType);
|
|
auto identityAffineMap = rewriter.getMultiDimIdentityMap(2);
|
|
SmallVector<AffineMap> affineMaps = {
|
|
AffineMap::get(2, 0, context), identityAffineMap, identityAffineMap};
|
|
|
|
matmulRetValue =
|
|
linalg::GenericOp::create(
|
|
rewriter, loc, matmulType,
|
|
ValueRange{scalarFactorValue, matmulRetValue},
|
|
ValueRange{outInitVal}, affineMaps,
|
|
llvm::ArrayRef<utils::IteratorType>{
|
|
utils::IteratorType::parallel, utils::IteratorType::parallel},
|
|
[&](OpBuilder &nestedBuilder, Location nestedLoc,
|
|
ValueRange args) {
|
|
auto mulf = arith::MulFOp::create(nestedBuilder, nestedLoc,
|
|
args[0], args[1]);
|
|
auto addf = arith::AddFOp::create(nestedBuilder, nestedLoc,
|
|
mulf.getResult(), args[2]);
|
|
linalg::YieldOp::create(nestedBuilder, nestedLoc,
|
|
addf.getResult());
|
|
})
|
|
.getResult(0);
|
|
}
|
|
|
|
// Insert (H, W) to (N, H, W, F).
|
|
Value combinedVal =
|
|
insert2DDataTo4D(builder, loc, matmulRetValue, args[0], NIter, FIter,
|
|
heightOffset, widthOffset, retRows, retCols,
|
|
/*loopNorFIdx=*/0,
|
|
/*loopCorFIdx=*/3, /*heightIdx=*/1,
|
|
/*widthIdx=*/2);
|
|
|
|
return {combinedVal};
|
|
};
|
|
|
|
int64_t tilwH = valueShape[2];
|
|
int64_t tileW = valueShape[3];
|
|
auto zeroIdx = arith::ConstantIndexOp::create(rewriter, loc, 0);
|
|
auto tileHBound = arith::ConstantIndexOp::create(rewriter, loc, tilwH);
|
|
auto tileWBound = arith::ConstantIndexOp::create(rewriter, loc, tileW);
|
|
auto nUpperBound = arith::ConstantIndexOp::create(rewriter, loc, valueN);
|
|
auto fUpperBound = arith::ConstantIndexOp::create(rewriter, loc, valueF);
|
|
auto oneStep = arith::ConstantIndexOp::create(rewriter, loc, 1);
|
|
scf::LoopNest loops = scf::buildLoopNest(
|
|
rewriter, loc, {zeroIdx, zeroIdx, zeroIdx, zeroIdx},
|
|
{tileHBound, tileWBound, nUpperBound, fUpperBound},
|
|
{oneStep, oneStep, oneStep, oneStep}, {output}, buildBody);
|
|
return loops.results[0];
|
|
}
|
|
|
|
/// Create an empty tensor with alignedType and insert the value into the
|
|
/// created empty tensor with aligned size.
|
|
static Value padToAlignedTensor(RewriterBase &rewriter, Location loc,
|
|
Value value, ArrayRef<int64_t> alignedShape) {
|
|
auto valueType = cast<ShapedType>(value.getType());
|
|
Type elementType = valueType.getElementType();
|
|
auto alignedType = RankedTensorType::get(alignedShape, elementType);
|
|
Value padValue = arith::ConstantOp::create(rewriter, loc, elementType,
|
|
rewriter.getZeroAttr(elementType));
|
|
|
|
return linalg::makeComposedPadHighOp(rewriter, loc, alignedType, value,
|
|
padValue, false);
|
|
}
|
|
|
|
/// Extract sub-tensor with extractedType from value.
|
|
static Value extractFromAlignedTensor(RewriterBase &rewriter, Location loc,
|
|
Value value,
|
|
RankedTensorType extractedType) {
|
|
OpFoldResult zeroIndex = rewriter.getIndexAttr(0);
|
|
OpFoldResult oneIndex = rewriter.getIndexAttr(1);
|
|
SmallVector<OpFoldResult, 4> offsets(4, zeroIndex);
|
|
SmallVector<OpFoldResult, 4> strides(4, oneIndex);
|
|
|
|
ArrayRef<int64_t> extractedShape = extractedType.getShape();
|
|
SmallVector<OpFoldResult> sizes =
|
|
getAsOpFoldResult(rewriter.getI64ArrayAttr(extractedShape));
|
|
|
|
return tensor::ExtractSliceOp::create(rewriter, loc, extractedType, value,
|
|
offsets, sizes, strides);
|
|
}
|
|
|
|
/// Utility function to check all values in the attribute are 1.
|
|
static bool hasAllOneValues(DenseIntElementsAttr attr) {
|
|
return llvm::all_of(
|
|
attr, [](const APInt &element) { return element.getSExtValue() == 1; });
|
|
}
|
|
|
|
/// A helper function to convert linalg.conv_2d_nhwc_fhwc to
|
|
/// linalg.winograd_*_transform ops.
|
|
static FailureOr<Operation *>
|
|
winogradConv2DHelper(RewriterBase &rewriter, linalg::Conv2DNhwcFhwcOp convOp,
|
|
WinogradConv2DFmr fmr) {
|
|
if (!convOp.hasPureTensorSemantics())
|
|
return rewriter.notifyMatchFailure(
|
|
convOp, "expected pure tensor semantics for linalg.conv_2d_nhwc_fhwc");
|
|
|
|
Value input = convOp.getInputs()[0];
|
|
Value filter = convOp.getInputs()[1];
|
|
Value output = convOp.getOutputs()[0];
|
|
auto inputType = cast<ShapedType>(input.getType());
|
|
auto filterType = cast<ShapedType>(filter.getType());
|
|
auto outputType = cast<ShapedType>(output.getType());
|
|
|
|
if (!inputType.hasStaticShape())
|
|
return rewriter.notifyMatchFailure(convOp,
|
|
"expected a static shape for the input");
|
|
|
|
if (!filterType.hasStaticShape())
|
|
return rewriter.notifyMatchFailure(
|
|
convOp, "expected a static shape for the filter");
|
|
|
|
if (!hasAllOneValues(convOp.getDilations()))
|
|
return rewriter.notifyMatchFailure(convOp,
|
|
"expected all ones for dilations");
|
|
|
|
if (!hasAllOneValues(convOp.getStrides()))
|
|
return rewriter.notifyMatchFailure(convOp, "expected all ones for strides");
|
|
|
|
ArrayRef<int64_t> filterShape = filterType.getShape();
|
|
int64_t filterF = filterShape[0];
|
|
int64_t filterH = filterShape[1];
|
|
int64_t filterW = filterShape[2];
|
|
int64_t filterC = filterShape[3];
|
|
ArrayRef<int64_t> inputShape = inputType.getShape();
|
|
int64_t inputN = inputShape[0];
|
|
int64_t inputH = inputShape[1];
|
|
int64_t inputW = inputShape[2];
|
|
int64_t inputC = inputShape[3];
|
|
ArrayRef<int64_t> outputShape = outputType.getShape();
|
|
int64_t outputN = outputShape[0];
|
|
int64_t outputH = outputShape[1];
|
|
int64_t outputW = outputShape[2];
|
|
int64_t outputF = outputShape[3];
|
|
|
|
int64_t m, r;
|
|
std::tie(m, r) = getFmrFromWinogradConv2DFmr(fmr);
|
|
// Only support F(m x m, r x r), F(m x 1, r x 1) or F(1 x m, 1 x r).
|
|
bool isSupportedFilter = false;
|
|
if (filterH == filterW && filterH == r)
|
|
isSupportedFilter = true;
|
|
if (filterH == r && filterW == 1)
|
|
isSupportedFilter = true;
|
|
if (filterH == 1 && filterW == r)
|
|
isSupportedFilter = true;
|
|
|
|
if (!isSupportedFilter)
|
|
return rewriter.notifyMatchFailure(
|
|
convOp, "only support filter (r x r), (r x 1) or (1 x r)");
|
|
|
|
// All the criterias are satisfied. We can do Winograd Conv2D.
|
|
Location loc = convOp.getLoc();
|
|
|
|
// For F(m x 1, r x 1), we only need to do left side transform.
|
|
bool leftTransform = filterH != 1;
|
|
// For F(1 x m, 1 x r), we only need to do right side transform.
|
|
bool rightTransform = filterW != 1;
|
|
int64_t heightM = leftTransform ? m : 1;
|
|
int64_t widthM = rightTransform ? m : 1;
|
|
int64_t heightR = leftTransform ? r : 1;
|
|
int64_t widthR = rightTransform ? r : 1;
|
|
|
|
// --- Create operation for filter transform ---
|
|
Type filterElementType = filterType.getElementType();
|
|
int64_t alphaH = heightM + heightR - 1;
|
|
int64_t alphaW = widthM + widthR - 1;
|
|
int64_t tileH = llvm::divideCeilSigned(outputH, heightM);
|
|
int64_t tileW = llvm::divideCeilSigned(outputW, widthM);
|
|
auto retType = RankedTensorType::get({alphaH, alphaW, filterC, filterF},
|
|
filterElementType);
|
|
Value retValue = tensor::EmptyOp::create(rewriter, loc, retType.getShape(),
|
|
filterElementType);
|
|
auto transformedFilter = linalg::WinogradFilterTransformOp::create(
|
|
rewriter, loc, retType, filter, retValue, fmr);
|
|
|
|
// --- Create operation for input transform ---
|
|
|
|
// When input size - (r - 1) is not aligned with output tile size, we need to
|
|
// pad the input data to create the full tiles as tiling.
|
|
Type inputElementType = inputType.getElementType();
|
|
int64_t alignedInputH = tileH * heightM + (heightR - 1);
|
|
int64_t alignedInputW = tileW * widthM + (widthR - 1);
|
|
if (alignedInputH != inputH || alignedInputW != inputW) {
|
|
input = padToAlignedTensor(rewriter, loc, input,
|
|
{inputN, alignedInputH, alignedInputW, inputC});
|
|
}
|
|
|
|
retType = RankedTensorType::get(
|
|
{alphaH, alphaW, tileH, tileW, inputN, inputC}, inputElementType);
|
|
retValue = tensor::EmptyOp::create(rewriter, loc, retType.getShape(),
|
|
inputElementType);
|
|
auto transformedInput = linalg::WinogradInputTransformOp::create(
|
|
rewriter, loc, retType, input, retValue, fmr);
|
|
|
|
Type outputElementType = outputType.getElementType();
|
|
Value matmulRet = matrixMultiply(rewriter, loc, transformedFilter,
|
|
transformedInput, outputElementType);
|
|
|
|
// --- Create operation for output transform ---
|
|
|
|
// When output size is not aligned with output tile size, we need to pad the
|
|
// output buffer to insert the full tiles after tiling.
|
|
int64_t alignedOutputH = tileH * heightM;
|
|
int64_t alignedOutputW = tileW * widthM;
|
|
bool isOutputUnaligned =
|
|
((alignedOutputH != outputH) || (alignedOutputW != outputW));
|
|
if (isOutputUnaligned) {
|
|
auto alignedOutputType = RankedTensorType::get(
|
|
{outputN, alignedOutputH, alignedOutputW, outputF}, outputElementType);
|
|
output =
|
|
padToAlignedTensor(rewriter, loc, output, alignedOutputType.getShape());
|
|
outputType = alignedOutputType;
|
|
}
|
|
|
|
Value transformedOutput = linalg::WinogradOutputTransformOp::create(
|
|
rewriter, loc, outputType, matmulRet, output, fmr);
|
|
|
|
// When output size is not aligned with output tile size, extract the
|
|
// value from the padded buffer.
|
|
if (isOutputUnaligned) {
|
|
transformedOutput = extractFromAlignedTensor(
|
|
rewriter, loc, transformedOutput,
|
|
RankedTensorType::get({outputN, outputH, outputW, outputF},
|
|
outputElementType));
|
|
}
|
|
|
|
rewriter.replaceOp(convOp, transformedOutput);
|
|
|
|
return transformedOutput.getDefiningOp();
|
|
}
|
|
|
|
/// A helper function to decompose linalg.winograd_filter_transform.
|
|
FailureOr<Operation *>
|
|
decomposeWinogradFilterTransformHelper(RewriterBase &rewriter,
|
|
linalg::WinogradFilterTransformOp op) {
|
|
Location loc = op.getLoc();
|
|
Value filter = op.getFilter();
|
|
auto filterType = cast<ShapedType>(filter.getType());
|
|
auto filterShape = filterType.getShape();
|
|
int64_t filterH = filterShape[1];
|
|
int64_t filterW = filterShape[2];
|
|
|
|
// For F(m x 1, r x 1), we only need to do left side transform.
|
|
bool leftTransform = filterH != 1;
|
|
// For F(1 x m, 1 x r), we only need to do right side transform.
|
|
bool rightTransform = filterW != 1;
|
|
Value transformedFilter =
|
|
filterTransform(rewriter, loc, filter, op.getOutput(), op.getFmr(),
|
|
leftTransform, rightTransform);
|
|
if (!transformedFilter)
|
|
return failure();
|
|
|
|
rewriter.replaceOp(op, transformedFilter);
|
|
|
|
return transformedFilter.getDefiningOp();
|
|
}
|
|
|
|
/// A helper function to decompose linalg.winograd_input_transform.
|
|
FailureOr<Operation *>
|
|
decomposeWinogradInputTransformHelper(RewriterBase &rewriter,
|
|
linalg::WinogradInputTransformOp op) {
|
|
Location loc = op.getLoc();
|
|
Value output = op.getOutput();
|
|
auto outputType = cast<ShapedType>(output.getType());
|
|
auto outputShape = outputType.getShape();
|
|
|
|
int64_t outputH = outputShape[0];
|
|
int64_t outputW = outputShape[1];
|
|
|
|
// For F(m x 1, r x 1), we only need to do left side transform.
|
|
bool leftTransform = outputH != 1;
|
|
// For F(1 x m, 1 x r), we only need to do right side transform.
|
|
bool rightTransform = outputW != 1;
|
|
Value transformedInput =
|
|
inputTransform(rewriter, loc, op.getInput(), op.getOutput(), op.getFmr(),
|
|
leftTransform, rightTransform);
|
|
if (!transformedInput)
|
|
return failure();
|
|
|
|
rewriter.replaceOp(op, transformedInput);
|
|
|
|
return transformedInput.getDefiningOp();
|
|
}
|
|
|
|
/// A helper function to decompose linalg.winograd_output_transform.
|
|
FailureOr<Operation *>
|
|
decomposeWinogradOutputTransformHelper(RewriterBase &rewriter,
|
|
linalg::WinogradOutputTransformOp op) {
|
|
Location loc = op.getLoc();
|
|
Value value = op.getValue();
|
|
auto valueType = cast<ShapedType>(value.getType());
|
|
auto valueShape = valueType.getShape();
|
|
int64_t valueH = valueShape[0];
|
|
int64_t valueW = valueShape[1];
|
|
|
|
// For F(m x 1, r x 1), we only need to do left side transform.
|
|
bool leftTransform = valueH != 1;
|
|
// For F(1 x m, 1 x r), we only need to do right side transform.
|
|
bool rightTransform = valueW != 1;
|
|
Value transformedOutput =
|
|
outputTransform(rewriter, loc, value, op.getOutput(), op.getFmr(),
|
|
leftTransform, rightTransform);
|
|
if (!transformedOutput)
|
|
return failure();
|
|
|
|
rewriter.replaceOp(op, transformedOutput);
|
|
|
|
return transformedOutput.getDefiningOp();
|
|
}
|
|
|
|
/// A rewrite pattern to decompose linalg.winograd_filter_transform operations.
|
|
class DecomposeWinogradFilterTransform final
|
|
: public OpRewritePattern<linalg::WinogradFilterTransformOp> {
|
|
public:
|
|
using OpRewritePattern::OpRewritePattern;
|
|
|
|
LogicalResult matchAndRewrite(linalg::WinogradFilterTransformOp op,
|
|
PatternRewriter &rewriter) const override {
|
|
return decomposeWinogradFilterTransformHelper(rewriter, op);
|
|
}
|
|
};
|
|
|
|
/// A rewrite pattern to decompose linalg.winograd_input_transform operations.
|
|
class DecomposeWinogradInputTransform final
|
|
: public OpRewritePattern<linalg::WinogradInputTransformOp> {
|
|
public:
|
|
using OpRewritePattern::OpRewritePattern;
|
|
|
|
LogicalResult matchAndRewrite(linalg::WinogradInputTransformOp op,
|
|
PatternRewriter &rewriter) const override {
|
|
return decomposeWinogradInputTransformHelper(rewriter, op);
|
|
}
|
|
};
|
|
|
|
/// A rewrite pattern to decompose linalg.winograd_output_transform operations.
|
|
class DecomposeWinogradOutputTransform final
|
|
: public OpRewritePattern<linalg::WinogradOutputTransformOp> {
|
|
public:
|
|
using OpRewritePattern::OpRewritePattern;
|
|
|
|
LogicalResult matchAndRewrite(linalg::WinogradOutputTransformOp op,
|
|
PatternRewriter &rewriter) const override {
|
|
return decomposeWinogradOutputTransformHelper(rewriter, op);
|
|
}
|
|
};
|
|
|
|
/// A rewrite pattern for Winograd Conv2D algorithm.
|
|
class WinogradConv2DNhwcFhwc final
|
|
: public OpRewritePattern<linalg::Conv2DNhwcFhwcOp> {
|
|
public:
|
|
using OpRewritePattern::OpRewritePattern;
|
|
WinogradConv2DNhwcFhwc(mlir::MLIRContext *context, WinogradConv2DFmr fmr)
|
|
: OpRewritePattern(context), fmr(fmr) {}
|
|
|
|
LogicalResult matchAndRewrite(linalg::Conv2DNhwcFhwcOp convOp,
|
|
PatternRewriter &rewriter) const override {
|
|
if (failed(winogradConv2DHelper(rewriter, convOp, fmr)))
|
|
return failure();
|
|
|
|
return success();
|
|
}
|
|
|
|
private:
|
|
WinogradConv2DFmr fmr;
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
FailureOr<Operation *> winogradConv2D(RewriterBase &rewriter,
|
|
linalg::Conv2DNhwcFhwcOp op,
|
|
linalg::WinogradConv2DFmr fmr) {
|
|
return winogradConv2DHelper(rewriter, op, fmr);
|
|
}
|
|
|
|
FailureOr<Operation *>
|
|
decomposeWinogradFilterTransformOp(RewriterBase &rewriter,
|
|
linalg::WinogradFilterTransformOp op) {
|
|
return decomposeWinogradFilterTransformHelper(rewriter, op);
|
|
}
|
|
|
|
FailureOr<Operation *>
|
|
decomposeWinogradInputTransformOp(RewriterBase &rewriter,
|
|
linalg::WinogradInputTransformOp op) {
|
|
return decomposeWinogradInputTransformHelper(rewriter, op);
|
|
}
|
|
|
|
FailureOr<Operation *>
|
|
decomposeWinogradOutputTransformOp(RewriterBase &rewriter,
|
|
linalg::WinogradOutputTransformOp op) {
|
|
return decomposeWinogradOutputTransformHelper(rewriter, op);
|
|
}
|
|
|
|
void populateWinogradConv2DPatterns(RewritePatternSet &patterns,
|
|
WinogradConv2DFmr fmr) {
|
|
MLIRContext *context = patterns.getContext();
|
|
// TODO: Support more Conv2D data layout, e.g., conv_2d_nchw_fchw
|
|
patterns.insert<WinogradConv2DNhwcFhwc>(context, fmr);
|
|
}
|
|
|
|
void populateDecomposeWinogradOpsPatterns(RewritePatternSet &patterns) {
|
|
MLIRContext *context = patterns.getContext();
|
|
patterns
|
|
.insert<DecomposeWinogradFilterTransform, DecomposeWinogradInputTransform,
|
|
DecomposeWinogradOutputTransform>(context);
|
|
}
|
|
|
|
} // end namespace linalg
|
|
} // end namespace mlir
|