49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
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// Copyright 2009-2020 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#include "parallel_prefix_sum.h"
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#include "../sys/regression.h"
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namespace embree
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{
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struct parallel_prefix_sum_regression_test : public RegressionTest
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{
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parallel_prefix_sum_regression_test(const char* name) : RegressionTest(name) {
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registerRegressionTest(this);
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}
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bool run ()
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{
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bool passed = true;
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const size_t M = 10;
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for (size_t N=10; N<10000000; N=size_t(2.1*N))
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{
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/* initialize array with random numbers */
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uint32_t sum0 = 0;
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std::vector<uint32_t> src(N);
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for (size_t i=0; i<N; i++) {
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sum0 += src[i] = rand();
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}
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/* calculate parallel prefix sum */
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std::vector<uint32_t> dst(N);
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for (auto& v : dst) v = 0;
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for (size_t i=0; i<M; i++) {
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uint32_t sum1 = parallel_prefix_sum(src,dst,N,0,std::plus<uint32_t>());
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passed &= (sum0 == sum1);
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}
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/* check if prefix sum is correct */
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for (size_t i=0, sum=0; i<N; sum+=src[i++])
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passed &= ((uint32_t)sum == dst[i]);
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}
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return passed;
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}
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};
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parallel_prefix_sum_regression_test parallel_prefix_sum_regression("parallel_prefix_sum_regression");
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}
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