50 lines
1.8 KiB
Plaintext
50 lines
1.8 KiB
Plaintext
/*
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Copyright 2013--2018 James E. McClure, Virginia Polytechnic & State University
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Copyright Equnior ASA
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This file is part of the Open Porous Media project (OPM).
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OPM is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OPM is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OPM. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Basic cuda functions callable from C/C++ code
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#include <cuda.h>
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extern "C" void dvc_AllocateDeviceMemory(void** address, size_t size){
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cudaMalloc(address,size);
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cudaMemset(*address,0,size);
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}
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extern "C" void dvc_CopyToDevice(void* dest, void* source, size_t size){
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cudaMemcpy(dest,source,size,cudaMemcpyHostToDevice);
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}
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extern "C" void dvc_CopyToHost(void* dest, void* source, size_t size){
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cudaMemcpy(dest,source,size,cudaMemcpyDeviceToHost);
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}
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extern "C" void dvc_Barrier(){
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cudaDeviceSynchronize();
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}
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/*
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#if __CUDA_ARCH__ < 600
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__device__ double atomicAdd(double* address, double val) {
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unsigned long long int* address_as_ull = (unsigned long long int*)address; unsigned long long int old = *address_as_ull, assumed;
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do {
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assumed = old;
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old = atomicCAS(address_as_ull, assumed, __double_as_longlong(val + __longlong_as_double(assumed)));
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// Note: uses integer comparison to avoid hang in case of NaN (since NaN != NaN)
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}
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while (assumed != old); return __longlong_as_double(old);
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}
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#endif
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*/ |