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concat cuda helper 

Signed-off-by: raver119 <raver119@gmail.com>
master
raver119 2019-08-09 13:01:51 +03:00
parent 1a0a8b1497
commit 6ed03217b4
1 changed files with 54 additions and 0 deletions
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54
libnd4j/include/ops/declarable/helpers/cuda/concat.cu
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@ -73,6 +73,60 @@ namespace nd4j {
concatCuda<T><<<512, 512, 512, *stream>>>(numOfArrs, pVx, pxShapeInfo, pVz, pzShapeInfo);
}
BUILD_SINGLE_TEMPLATE(template void concatCudaLauncher, (const int numOfArrs, const cudaStream_t *stream, void* pVx, void* pxShapeInfo, void* pVz, void* pzShapeInfo), LIBND4J_TYPES);
//////////////////////////////////////////////////////////////////////////
void concat(nd4j::LaunchContext * context, const std::vector<NDArray*>& inArrs, NDArray& output, const int axis) {
const int numOfArrs = inArrs.size();
for(int i = 0; i < numOfArrs; ++i)
if(!inArrs[i]->isActualOnDeviceSide()) inArrs[i]->syncToDevice();
const int rank = inArrs[0]->rankOf();
const int rank2 = 2*rank;
std::vector<std::vector<Nd4jLong>> indices(numOfArrs, std::vector<Nd4jLong>(rank2,0));
// take into account indices for first array
indices[0][2 * axis + 1] = inArrs[0]->sizeAt(axis);
// loop through the rest of input arrays
for(int i = 1; i < numOfArrs; ++i) {
indices[i][2 * axis] = indices[i-1][2 * axis + 1]; // index start from
indices[i][2 * axis + 1] = indices[i-1][2 * axis + 1] + inArrs[i]->sizeAt(axis); // index end with (excluding)
}
std::vector<NDArray*> outSubArrs(numOfArrs);
for(int i = 0; i < numOfArrs; ++i)
outSubArrs[i] = new NDArray(output(indices[i], true));
// prepare arrays of pointers on buffers and shapes
std::vector<void*> hOutBuffers(numOfArrs), hInBuffers(numOfArrs);
std::vector<Nd4jLong*> hOutShapeInfo(numOfArrs), hInShapeInfo(numOfArrs);
for(int i = 0; i < numOfArrs; ++i) {
hOutBuffers[i] = outSubArrs[i]->getSpecialBuffer();
hInBuffers[i] = inArrs[i]->getSpecialBuffer();
hOutShapeInfo[i] = outSubArrs[i]->getSpecialShapeInfo();
hInShapeInfo[i] = inArrs[i]->getSpecialShapeInfo();
}
// allocate and copy all buffers and shapes arrays to global memory
PointersManager manager(context, "helpers::concat");
void* dOutBuffers = manager.replicatePointer(hOutBuffers.data(), hOutBuffers.size() * sizeof(void*));
void* dInBuffers = manager.replicatePointer(hInBuffers.data(), hInBuffers.size() * sizeof(void*));
void* dInShapeInfo = manager.replicatePointer(hInShapeInfo.data(), hInShapeInfo.size() * sizeof(Nd4jLong*));
void* dOutShapeInfo = manager.replicatePointer(hOutShapeInfo.data(), hOutShapeInfo.size() * sizeof(Nd4jLong*));
BUILD_SINGLE_SELECTOR(inArrs[0]->dataType(), concatCudaLauncher, (numOfArrs, context->getCudaStream(), dInBuffers, dInShapeInfo, dOutBuffers, dOutShapeInfo), LIBND4J_TYPES);
manager.synchronize();
for(int i = 0; i < numOfArrs; ++i)
delete outSubArrs[i];
for(int i = 0; i < numOfArrs; ++i)
inArrs[i]->tickReadHost();
output.tickWriteDevice();
}
}
}
}