131 lines
5.5 KiB
C++
131 lines
5.5 KiB
C++
/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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//
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// @author Yurii Shyrma (iuriish@yahoo.com), created on 19.09.2018
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//
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#include <ops/declarable/helpers/im2col.h>
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namespace nd4j {
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namespace ops {
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namespace helpers {
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//////////////////////////////////////////////////////////////////////////
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template <typename T>
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static void im2col_(nd4j::LaunchContext & context, const NDArray& input, NDArray& output, const int kH, const int kW, const int sH, const int sW, const int pH, const int pW, const int dH, const int dW, const NDArray& arrZeroPadVal) {
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// input [bS, iC, iH, iW] is convoluted to output [bS, iC, kH, kW, oH, oW]
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auto imBuff = static_cast<T*>(input.getBuffer());
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auto colBuff = static_cast<T*>(output.getBuffer());
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auto imShapeBuffer = input.getShapeInfo();
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auto colShapeBuffer = output.getShapeInfo();
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auto colShape = shape::shapeOf(colShapeBuffer);
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auto colStride = shape::stride(colShapeBuffer);
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auto imShape = shape::shapeOf(imShapeBuffer);
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auto imStride = shape::stride(imShapeBuffer);
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const T zeroPadVal = arrZeroPadVal.e<T>(0);
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const int bS = imShape[0];
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const int iC = imShape[1];
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const int iH = imShape[2];
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const int iW = imShape[3];
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const int oH = colShape[4];
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const int oW = colShape[5];
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const Nd4jLong colStride0 = colStride[0];
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const Nd4jLong colStride1 = colStride[1];
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const Nd4jLong colStride2 = colStride[2];
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const Nd4jLong colStride3 = colStride[3];
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const Nd4jLong colStride4 = colStride[4];
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const Nd4jLong colStride5 = colStride[5];
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const Nd4jLong imStride0 = imStride[0];
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const Nd4jLong imStride1 = imStride[1];
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const Nd4jLong imStride2 = imStride[2];
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const Nd4jLong imStride3 = imStride[3];
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T *col, *im;
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int imRow, imCol;
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if (shape::order(imShapeBuffer) == 'c' && shape::order(colShapeBuffer) == 'c' && shape::strideDescendingCAscendingF(imShapeBuffer) && shape::strideDescendingCAscendingF(colShapeBuffer)) {
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PRAGMA_OMP_PARALLEL_FOR_SIMD_ARGS(private(col, im, imRow, imCol) collapse(2))
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for (int b = 0; b < bS; b++) {
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for (int c = 0; c < iC; ++c) {
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for (int kRow = 0; kRow < kH; ++kRow) {
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for (int kCol = 0; kCol < kW; ++kCol) {
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for (int colH = 0; colH < oH; ++colH) {
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for (int colW = 0; colW < oW; ++colW) {
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imRow = (-pH + kRow * dH) + colH*sH;
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imCol = (-pW + kCol * dW) + colW*sW;
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col = colBuff + b*colStride0 + c*colStride1 + kRow*colStride2 + kCol*colStride3 + colH*colStride4 + colW*colStride5;
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if (static_cast<unsigned>(imRow) >= static_cast<unsigned>(iH) || static_cast<unsigned>(imCol) >= static_cast<unsigned>(iW))
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*col = zeroPadVal;
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else {
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im = imBuff + b*imStride0 + c*imStride1 + imRow*imStride2 + imCol*imStride3;
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*col = *im;
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}
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}
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}
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}
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}
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}
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}
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}
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else {
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PRAGMA_OMP_PARALLEL_FOR_SIMD_ARGS(private(im, col, imRow, imCol) collapse(2))
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for (int b = 0; b < bS; b++) {
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for (int colH = 0; colH < oH; ++colH) {
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for (int colW = 0; colW < oW; ++colW) {
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for (int c = 0; c < iC; ++c) {
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for (int kRow = 0; kRow < kH; ++kRow) {
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for (int kCol = 0; kCol < kW; ++kCol) {
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imRow = (-pH + kRow * dH) + colH*sH;
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imCol = (-pW + kCol * dW) + colW*sW;
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col = colBuff + b*colStride0 + c*colStride1 + kRow*colStride2 + kCol*colStride3 + colH*colStride4 + colW*colStride5;
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if (static_cast<unsigned>(imRow) >= static_cast<unsigned>(iH) || static_cast<unsigned>(imCol) >= static_cast<unsigned>(iW))
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*col = zeroPadVal;
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else {
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im = imBuff + b*imStride0 + c*imStride1 + imRow*imStride2 + imCol*imStride3;
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*col = *im;
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}
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}
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}
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}
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}
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}
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}
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}
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}
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void im2col(nd4j::LaunchContext & context, const NDArray& im, NDArray& col, const int kH, const int kW, const int sH, const int sW, const int pH, const int pW, const int dH, const int dW, const NDArray& arrZeroPadVal) {
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BUILD_SINGLE_SELECTOR(im.dataType(), im2col_, (context, im, col, kH, kW, sH, sW, pH, pW, dH, dW, arrZeroPadVal), FLOAT_TYPES);
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}
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}
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}
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} |