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// Copyright (c) 2021-2025, Intel Corporation
// SPDX-License-Identifier: BSD-3-Clause
#include <cassert>
#include <iostream>
#include <string>
#if defined(_WIN32) || defined(_WIN64)
#include <malloc.h>
#else
#include <cstdlib>
#endif
#include "config.h"
// Set maximum alignment for existing ISPC targets.
#define ALIGNMENT 64
class Docs {
public:
Docs(std::string message) {
std::cout << "BENCHMARKS_ISPC_TARGETS: " << BENCHMARKS_ISPC_TARGETS << "\n";
std::cout << "BENCHMARKS_ISPC_FLAGS: " << BENCHMARKS_ISPC_FLAGS << "\n";
std::cout << message << "\n";
}
};
// Helper function to enabled allocated allocations.
// Despite aligned_alloc() is part of C++, MSVS doesn't support it.
void *aligned_alloc_helper(size_t size, size_t alignment = ALIGNMENT) {
assert(size % alignment == 0 && "Size is not multiple of alignment");
#if defined(_WIN32) || defined(_WIN64)
return _aligned_malloc(size, alignment);
#else
return aligned_alloc(alignment, size);
#endif
}
void aligned_free_helper(void *ptr) {
#if defined(_WIN32) || defined(_WIN64)
_aligned_free(ptr);
#else
free(ptr);
#endif
}
// Warm up run
// Despite other ways of CPU stabilization, on some CPUSs we need to do a "warm up" in order to get more stable results.
// This also helps stabilizing results when other ways to fix frequency are not available / not applicable.
#define WARM_UP_RUN() \
static void warm_up(benchmark::State &state) { \
int count = static_cast<int>(state.range(0)); \
float *src = static_cast<float *>(aligned_alloc_helper(sizeof(float) * count)); \
float *dst = static_cast<float *>(aligned_alloc_helper(sizeof(float) * count)); \
for (int i = 0; i < count; i++) { \
src[i] = 1.0f; \
dst[i] = 0.0f; \
} \
\
for (auto _ : state) { \
for (int i = 0; i < count; i++) { \
benchmark::DoNotOptimize(dst[i] = src[i] * 2.0f + 3.0f); \
} \
} \
\
aligned_free_helper(src); \
aligned_free_helper(dst); \
} \
BENCHMARK(warm_up)->Arg(256)->Arg(256 << 4)->Arg(256 << 7)->Arg(256 << 12);
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