267 lines
13 KiB
Plaintext
267 lines
13 KiB
Plaintext
/*******************************************************************************
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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 20.04.2018
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//
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#include<ops/declarable/helpers/transforms.h>
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#include <array/ResultSet.h>
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#include <helpers/ShapeUtils.h>
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#include <numeric>
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#include <NDArrayFactory.h>
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#include <helpers/TAD.h>
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#include <exceptions/cuda_exception.h>
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#include <PointersManager.h>
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#include <ConstantTadHelper.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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// x - input, y - paddings, z - output
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template<typename X, typename Y>
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__global__ static void padCuda(const int mode,
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const void *vx, const Nd4jLong *xShapeInfo,
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const void *vy, const Nd4jLong *yShapeInfo,
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void *vz, const Nd4jLong *zShapeInfo,
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const void *vPadVal) {
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const X padVal = *reinterpret_cast<const X*>(vPadVal);
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const auto x = reinterpret_cast<const X*>(vx);
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const auto y = reinterpret_cast<const Y*>(vy);
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auto z = reinterpret_cast<X*>(vz);
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__shared__ int rank, rankMinusOne;
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__shared__ Nd4jLong zLen, totalThreads, *coords, *xShape, *zShape, shift1, shift2, yStride0;
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if (threadIdx.x == 0) {
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extern __shared__ unsigned char shmem[];
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coords = reinterpret_cast<Nd4jLong*>(shmem);
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zLen = shape::length(zShapeInfo);
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xShape = shape::shapeOf(const_cast<Nd4jLong*>(xShapeInfo));
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zShape = shape::shapeOf(const_cast<Nd4jLong*>(zShapeInfo));
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yStride0 = shape::stride(const_cast<Nd4jLong*>(yShapeInfo))[0];
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rank = shape::rank(xShapeInfo);
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zLen = shape::length(zShapeInfo);
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rankMinusOne = rank - 1;
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totalThreads = gridDim.x * blockDim.x;
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shift1 = mode == 1 ? 0 : 1; // REFLECT : SYMMETRIC
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shift2 = mode == 1 ? 2 : 1; // REFLECT : SYMMETRIC
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}
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__syncthreads();
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auto xzCoord = coords + threadIdx.x * rank; // we use xzCoord storage both for x and z arrays
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const auto tid = blockIdx.x * blockDim.x + threadIdx.x;
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if(mode == 0) { // CONSTANT case
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for (Nd4jLong i = tid; i < zLen; i += totalThreads) {
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shape::index2coords(i, zShapeInfo, xzCoord);
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const auto zOffset = shape::getOffset(zShapeInfo, xzCoord);
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bool within = true;
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for(int j = rankMinusOne; j >= 0; --j) {
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if(xShape[j] == zShape[j]) continue;
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const auto left = y[shape::getIndexOffset(yStride0 * j, yShapeInfo)];
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if(xzCoord[j] < left || xzCoord[j] >= left + xShape[j]) {within = false; break;}
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else {xzCoord[j] = xzCoord[j] - left;}
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}
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if(within)
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z[zOffset] = x[shape::getOffset(xShapeInfo, xzCoord)];
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else
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z[zOffset] = padVal;
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}
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}
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else { // REFLECT and SYMMETRIC cases
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for (Nd4jLong i = tid; i < zLen; i += totalThreads) {
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shape::index2coords(i, zShapeInfo, xzCoord);
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const auto zOffset = shape::getOffset(zShapeInfo, xzCoord);
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for(int j = rankMinusOne; j >= 0; --j) {
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if(xShape[j] == zShape[j]) continue;
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xzCoord[j] = xzCoord[j] - y[shape::getIndexOffset(yStride0 * j, yShapeInfo)]; // are ready to fill middle (within input dimension range)
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if(xzCoord[j] < 0) xzCoord[j] = -xzCoord[j] - shift1; // means fill from left
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else if(xzCoord[j] >= xShape[j]) xzCoord[j] = 2 * xShape[j] - xzCoord[j] - shift2; // means fill from right
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}
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const auto xOffset = shape::getOffset(xShapeInfo, xzCoord);
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z[zOffset] = x[xOffset];
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}
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}
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}
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///////////////////////////////////////////////////////////////////
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template<typename X, typename Y>
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static void padCudaLauncher(const int blocksPerGrid, const int threadsPerBlock, const int sharedMem, const cudaStream_t *stream,
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const int mode,
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const void *vx, const Nd4jLong *xShapeInfo,
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const void *vy, const Nd4jLong *yShapeInfo,
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void *vz, const Nd4jLong *zShapeInfo,
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const void* padVal) {
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padCuda<X,Y><<<blocksPerGrid, threadsPerBlock, sharedMem, *stream>>>(mode, vx, xShapeInfo, vy, yShapeInfo, vz, zShapeInfo, padVal);
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}
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///////////////////////////////////////////////////////////////////
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void pad(nd4j::LaunchContext * context, const int mode, const NDArray& input, const NDArray& paddings, NDArray& output, const NDArray& padValue) {
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PointersManager manager(context, "pad");
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NDArray::prepareSpecialUse({&output}, {&input, &paddings, &padValue});
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const int threadsPerBlock = MAX_NUM_THREADS / 4;
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const int blocksPerGrid = (output.lengthOf() + threadsPerBlock - 1) / threadsPerBlock;
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const int sharedMem = 8 * threadsPerBlock * output.rankOf() + 128;
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const auto xType = input.dataType();
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const auto yType = paddings.dataType();
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BUILD_DOUBLE_SELECTOR(xType, yType, padCudaLauncher, (blocksPerGrid, threadsPerBlock, sharedMem, context->getCudaStream(), mode, input.getSpecialBuffer(), input.getSpecialShapeInfo(), paddings.getSpecialBuffer(), paddings.getSpecialShapeInfo(), output.getSpecialBuffer(), output.getSpecialShapeInfo(), padValue.getSpecialBuffer()), LIBND4J_TYPES, INDEXING_TYPES);
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NDArray::registerSpecialUse({&output}, {&input, &paddings, &padValue});
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manager.synchronize();
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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template <typename T>
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static __global__ void mirrorPadLinearKernel(void const* vx, Nd4jLong* xShape, void* vz, Nd4jLong* zShape, Nd4jLong leftSide, Nd4jLong leftSideCorrected, Nd4jLong xLen, Nd4jLong len, Nd4jLong zLen) {
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__shared__ T const* x;
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__shared__ T* z;
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if (threadIdx.x == 0) {
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x = reinterpret_cast<T const*>(vx);
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z = reinterpret_cast<T*>(vz);
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}
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__syncthreads();
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auto start = blockIdx.x * blockDim.x + threadIdx.x;
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auto step = blockDim.x * gridDim.x;
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for(int i = start; i < zLen; i+= step) {
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auto zIndex = shape::getIndexOffset(i, zShape);
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auto xIndex = shape::getIndexOffset(len - i, xShape);
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if (i < leftSide) // left side
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xIndex = shape::getIndexOffset(leftSideCorrected - i, xShape);
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else if(i >= leftSide && i < leftSide + xLen) // middle
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xIndex = shape::getIndexOffset(i - leftSide, xShape);
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// else // right side
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// z[i] = x[len - i];
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z[zIndex] = x[xIndex];
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}
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}
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template <typename F, typename I>
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static __global__ void mirrorPadKernel(void const* vx, Nd4jLong* xShape, void* vz, Nd4jLong* zShape, Nd4jLong outLen, void const* paddings, Nd4jLong* paddingShape, int reflBorder) {
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__shared__ F const* x;
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__shared__ I const* pads;
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__shared__ F* z;
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__shared__ Nd4jLong zRank, rank;
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__shared__ Nd4jLong* xIdx;
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if (threadIdx.x == 0) {
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extern __shared__ unsigned char shmem[];
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xIdx = reinterpret_cast<Nd4jLong*>(shmem);
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rank = shape::rank(xShape);
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x = reinterpret_cast<F const*>(vx);//
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pads = reinterpret_cast<I const*>(paddings);
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z = reinterpret_cast<F*>(vz);
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}
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__syncthreads();
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auto start = threadIdx.x + blockIdx.x * blockDim.x;
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auto step = blockDim.x * gridDim.x;
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for(Nd4jLong i = start; i < outLen; i+= step) {
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auto xzCoord = xIdx + threadIdx.x * rank;
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//auto zxCoord = xIdx + (threadIdx.x + threadIdx.x % 2 + 1) * rank;
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shape::index2coords(i, zShape, xzCoord);
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auto outOffset = shape::getOffset(zShape, xzCoord);
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// auto intStep = blockDim.y * gridDim.y;
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for(int j = 0; j < rank; j++) {
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const Nd4jLong inLen = shape::sizeAt(xShape, j);
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Nd4jLong coords[2] = {j, 0};
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auto padOffset = shape::getOffset(paddingShape, coords); // padding already has rank 2
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const auto leftSide = pads[padOffset];
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const auto leftSideCorrected = leftSide - reflBorder;
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const Nd4jLong len = 2 * (inLen - 1) + leftSide + reflBorder;
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if(xzCoord[j] < leftSide) // left side
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xzCoord[j] = leftSideCorrected - xzCoord[j];
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else if(xzCoord[j] >= leftSide && xzCoord[j] < leftSide + inLen) // middle
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xzCoord[j] = xzCoord[j] - leftSide;
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else if (len > xzCoord[j]) // right side
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xzCoord[j] = len - xzCoord[j];
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else
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xzCoord[j] = xzCoord[j] - len;
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}
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auto inOffset = shape::getOffset(xShape, xzCoord);
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z[outOffset] = x[inOffset];
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}
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}
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template<typename F, typename I>
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static void mirrorPad_(nd4j::LaunchContext * context, const NDArray& input, const NDArray& paddings, NDArray& output, const int mode) {
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// mode: 0 - REFLECT, else - SYMMETRIC
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const int reflBorder = (bool)mode ? 1 : 0;
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const int rank = input.rankOf();
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const Nd4jLong outLen = output.lengthOf();
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auto stream = context->getCudaStream();
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NDArray::prepareSpecialUse({&output}, {&input, &paddings});
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if(rank <= 1) {
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const Nd4jLong inLen = input.lengthOf();
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const auto leftSide = paddings.e<Nd4jLong>(0);
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const auto leftSideCorrected = leftSide - reflBorder;
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const Nd4jLong len = 2*(inLen-1) + leftSide + reflBorder;
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mirrorPadLinearKernel<F><<<256, 512, 256, *stream>>>(input.getSpecialBuffer(), input.getSpecialShapeInfo(), output.specialBuffer(), output.specialShapeInfo(), leftSide, leftSideCorrected, inLen, len, outLen);
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nd4j::DebugHelper::checkErrorCode(stream, "helpers::mirrorPadLinearKernel(...) failed");
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}
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else {
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mirrorPadKernel<F, I><<<256, 256, 8192, *stream>>>(input.getSpecialBuffer(), input.getSpecialShapeInfo(), output.specialBuffer(), output.specialShapeInfo(), outLen, paddings.getSpecialBuffer(), paddings.getSpecialShapeInfo(), reflBorder);
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nd4j::DebugHelper::checkErrorCode(stream, "helpers::mirrorPadKernel(...) failed");
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}
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NDArray::registerSpecialUse({&output}, {&input, &paddings});
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}
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void mirrorPad(nd4j::LaunchContext * context, const NDArray& input, const NDArray& paddings, NDArray& output, const int mode) {
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BUILD_DOUBLE_SELECTOR(input.dataType(), paddings.dataType(), mirrorPad_, (context, input, paddings, output, mode), LIBND4J_TYPES, INDEXING_TYPES);
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}
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}
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}
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} |