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https://github.com/NVIDIA/cuda-samples.git
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68 lines
3.3 KiB
C++
68 lines
3.3 KiB
C++
/* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of NVIDIA CORPORATION nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Example of integrating CUDA functions into an existing
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* application / framework.
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* Reference solution computation.
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*/
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// Required header to support CUDA vector types
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#include <vector_types.h>
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////////////////////////////////////////////////////////////////////////////////
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// export C interface
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extern "C" void computeGold(char *reference, char *idata,
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const unsigned int len);
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extern "C" void computeGold2(int2 *reference, int2 *idata,
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const unsigned int len);
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////////////////////////////////////////////////////////////////////////////////
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//! Compute reference data set
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//! Each element is multiplied with the number of threads / array length
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//! @param reference reference data, computed but preallocated
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//! @param idata input data as provided to device
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//! @param len number of elements in reference / idata
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////////////////////////////////////////////////////////////////////////////////
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void computeGold(char *reference, char *idata, const unsigned int len) {
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for (unsigned int i = 0; i < len; ++i) reference[i] = idata[i] - 10;
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}
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////////////////////////////////////////////////////////////////////////////////
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//! Compute reference data set for int2 version
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//! Each element is multiplied with the number of threads / array length
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//! @param reference reference data, computed but preallocated
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//! @param idata input data as provided to device
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//! @param len number of elements in reference / idata
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////////////////////////////////////////////////////////////////////////////////
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void computeGold2(int2 *reference, int2 *idata, const unsigned int len) {
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for (unsigned int i = 0; i < len; ++i) {
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reference[i].x = idata[i].x - idata[i].y;
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reference[i].y = idata[i].y;
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}
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}
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