wehub-resource-sync
124 lines
4.8 KiB
C++
124 lines
4.8 KiB
C++
/* ******************************************************************************
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*
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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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* See the NOTICE file distributed with this work for additional
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* information regarding copyright ownership.
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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 <execution/Threads.h>
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#include <ops/declarable/helpers/im2col.h>
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#if NOT_EXCLUDED(OP_im2col)
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namespace sd {
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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_(sd::LaunchContext& context, NDArray& input, NDArray& output, const LongType kH,
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const LongType kW, const LongType sH, const LongType sW, const LongType pH, const LongType pW,
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const LongType dH, const LongType dW, 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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if(input.rankOf() != 4) {
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THROW_EXCEPTION("ops::helpers::im2col: input array must have rank = 4");
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}
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if(output.rankOf() != 6) {
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THROW_EXCEPTION("ops::helpers::im2col: output array must have rank = 6");
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}
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auto imBuff = static_cast<T const*>(input.buffer());
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auto colBuff = static_cast<T*>(output.buffer());
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auto imShapeBuffer = input.shapeInfo();
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auto colShapeBuffer = output.shapeInfo();
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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 LongType bS = imShape[0];
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const LongType iC = imShape[1];
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const LongType iH = imShape[2];
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const LongType iW = imShape[3];
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const LongType oH = colShape[4];
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const LongType oW = colShape[5];
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const sd::LongType colStride0 = colStride[0];
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const sd::LongType colStride1 = colStride[1];
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const sd::LongType colStride2 = colStride[2];
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const sd::LongType colStride3 = colStride[3];
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const sd::LongType colStride4 = colStride[4];
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const sd::LongType colStride5 = colStride[5];
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const sd::LongType imStride0 = imStride[0];
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const sd::LongType imStride1 = imStride[1];
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const sd::LongType imStride2 = imStride[2];
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const sd::LongType imStride3 = imStride[3];
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auto func = PRAGMA_THREADS_FOR_2D {
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sd::LongType imRow, imCol, colIndex, imIndex;
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for (auto b = start_x; b < stop_x; b += inc_x) {
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for (auto colH = start_y; colH < stop_y; colH += inc_y) {
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for (sd::LongType colW = 0; colW < oW; ++colW) {
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for (sd::LongType c = 0; c < iC; ++c) {
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for (sd::LongType kRow = 0; kRow < kH; ++kRow) {
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for (sd::LongType 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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colIndex = b * colStride0 + c * colStride1 + kRow * colStride2 + kCol * colStride3 +
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colH * colStride4 + colW * colStride5;
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if (static_cast<LongType>(imRow) >= static_cast<LongType>(iH) ||
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static_cast<LongType>(imRow) < 0 ||
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static_cast<LongType>(imCol) >= static_cast<LongType>(iW) ||
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static_cast<LongType>(imCol) < 0) {
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if (colIndex < output.lengthOf()) {
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colBuff[colIndex] = zeroPadVal;
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}
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} else {
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imIndex = b * imStride0 + c * imStride1 + imRow * imStride2 + imCol * imStride3;
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if (colIndex < output.lengthOf() && imIndex < input.lengthOf()) {
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colBuff[colIndex] = static_cast<T>(imBuff[imIndex]);
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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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samediff::Threads::parallel_for(func, 0, bS, 1, 0, oH, 1);
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}
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void im2col(sd::LaunchContext& context, NDArray& im, NDArray& col, const LongType kH, const LongType kW,
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const LongType sH, const LongType sW, const LongType pH, const LongType pW, const LongType dH,
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const LongType dW, NDArray& arrZeroPadVal) {
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BUILD_SINGLE_SELECTOR(im.dataType(), im2col_, (context, im, col, kH, kW, sH, sW, pH, pW, dH, dW, arrZeroPadVal),
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SD_FLOAT_TYPES);
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}
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} // namespace helpers
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} // namespace ops
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} // namespace sd
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#endif |