93 lines
4.1 KiB
Plaintext
93 lines
4.1 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 raver119@gmail.com
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// @author Yurii Shyrma, created on 15.11.2018
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//
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#include <loops/special_kernels.h>
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namespace nd4j {
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///////////////////////////////////////////////////////////////////////
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template<typename T>
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__device__ void pullRowsKernel(void *vx,
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void *vz,
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Nd4jLong len,
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Nd4jLong *indexes,
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Nd4jLong *tadShapeInfo, Nd4jLong *tadOffsets,
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Nd4jLong *zTadShapeInfo, Nd4jLong *zTadOffsets) {
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auto x = reinterpret_cast<T *>(vx);
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auto z = reinterpret_cast<T *>(vz);
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auto xEWS = shape::elementWiseStride(tadShapeInfo);
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auto zEWS = shape::elementWiseStride(zTadShapeInfo);
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auto tadLength = shape::length(tadShapeInfo);
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if (xEWS >= 1 && zEWS >= 1) {
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for (int idx = blockIdx.x; idx < len; idx += gridDim.x) {
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T *rX = x + tadOffsets[indexes[idx]];
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T *rZ = z + zTadOffsets[idx];
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for (int i = threadIdx.x; i < tadLength; i += blockDim.x) {
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rZ[i * zEWS] = rX[i * xEWS];
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}
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}
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} else {
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for (int idx = blockIdx.x; idx < len; idx += gridDim.x) {
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T *rX = x + tadOffsets[indexes[idx]];
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T *rZ = z + zTadOffsets[idx];
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for (int i = threadIdx.x; i < tadLength; i += blockDim.x) {
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auto xOffset = shape::getIndexOffset(i, tadShapeInfo, tadLength);
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auto zOffset = shape::getIndexOffset(i, zTadShapeInfo, tadLength);
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rZ[zOffset] = rX[xOffset];
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}
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}
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}
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}
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///////////////////////////////////////////////////////////////////////
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template<typename T>
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__global__ void execPullRowsKernel(void *vx,
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void *vz,
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Nd4jLong len,
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Nd4jLong *indexes,
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Nd4jLong *tadShapeInfo, Nd4jLong *tadOffsets,
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Nd4jLong *zTadShapeInfo, Nd4jLong *zTadOffsets) {
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pullRowsKernel<T>(vx, vz, len, indexes, tadShapeInfo, tadOffsets, zTadShapeInfo, zTadOffsets);
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}
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///////////////////////////////////////////////////////////////////////
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template<typename T>
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__host__ void pullRowsKernelGeneric(dim3 &launchDims, cudaStream_t *stream,
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void *vx,
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void *vz,
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Nd4jLong len,
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Nd4jLong *indexes,
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Nd4jLong *tadShapeInfo, Nd4jLong *tadOffsets,
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Nd4jLong *zTadShapeInfo, Nd4jLong *zTadOffsets) {
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execPullRowsKernel<T><<<launchDims.x, launchDims.y, launchDims.z, *stream>>>(vx, vz, len, indexes, tadShapeInfo, tadOffsets, zTadShapeInfo, zTadOffsets);
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nd4j::DebugHelper::checkErrorCode(stream, "pullRows(...) failed");
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}
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BUILD_SINGLE_TEMPLATE(template void ND4J_EXPORT pullRowsKernelGeneric, (dim3 & launchDims, cudaStream_t * stream, void * vx, void * vz, Nd4jLong len, Nd4jLong * indexes, Nd4jLong * tadShapeInfo, Nd4jLong * tadOffsets, Nd4jLong *zTadShapeInfo, Nd4jLong * zTadOffsets), LIBND4J_TYPES);
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}
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