Evgeny Mankov
82 línte
3.0 KiB
C++
82 línte
3.0 KiB
C++
/*
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Copyright (c) 2015-present Advanced Micro Devices, Inc. All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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// Simple test showing how to use HC syntax with array.
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// Array provides a type-safe C++ mechanism to allocate accelerator memory.
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// Like array_view, hc::array provides multi-dimensional indexing capability,
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// and is typed. However, unlike array_view, hc::array does not provide
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// automatic data management capabilities - instead the programmer
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// takes the reins and controls when copies are executed.
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#if defined(HC_NEXT)
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#include <hc/hc.hpp>
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#else
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#include <hc.hpp>
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#endif
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int main(int argc, char* argv[]) {
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int sizeElements = 1000000;
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size_t sizeBytes = sizeElements * sizeof(float);
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bool pass = true;
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// Allocate host memory
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float* A_h = (float*)malloc(sizeBytes);
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float* B_h = (float*)malloc(sizeBytes);
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float* C_h = (float*)malloc(sizeBytes);
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// Allocate device arrays<>
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// Unlike array_view, these must be explicitly managed by user:
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hc::array<float> A_d(sizeElements);
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hc::array<float> B_d(sizeElements);
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hc::array<float> C_d(sizeElements);
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// Initialize host data
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for (int i = 0; i < sizeElements; i++) {
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A_h[i] = 1.618f * i;
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B_h[i] = 3.142f * i;
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}
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hc::copy(A_h, A_d); // C++ copy H2D
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hc::copy(B_h, B_d); // C++ copy H2D
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// Launch kernel onto default accelerator:
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// array<> types are not implicitly copied, so we performed copies above.
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hc::parallel_for_each(hc::extent<1>(sizeElements), [&](hc::index<1> idx)[[hc]] {
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int i = idx[0];
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C_d[i] = A_d[i] + B_d[i];
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});
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// HCC runtime knows that C_d depends on previous PFE and will force the copy to wait for the
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// PFE to complte.
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hc::copy(C_d, C_h); // C++ copy D2H
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for (int i = 0; i < sizeElements; i++) {
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float ref = 1.618f * i + 3.142f * i;
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if (C_h[i] != ref) {
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printf("error:%d computed=%6.2f, reference=%6.2f\n", i, C_h[i], ref);
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pass = false;
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}
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};
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if (pass) printf("PASSED!\n");
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}
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