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// Copyright 2019 Google LLC
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree.
#pragma once
#include <cstddef>
#include <cstdint>
#include <benchmark/benchmark.h>
namespace benchmark {
namespace utils {
uint32_t WipeCache();
uint32_t PrefetchToL1(const void* ptr, size_t size);
// Disable support for denormalized numbers in floating-point units.
void DisableDenormals();
// Return clock rate, in Hz, for the currently used logical processor.
uint64_t GetCurrentCpuFrequency();
// Return maximum (across all cores/clusters/sockets) last level cache size.
// Can overestimate, but not underestimate LLC size.
size_t GetMaxCacheSize();
// Set multi-threading parameters appropriate for the processor.
void MultiThreadingParameters(benchmark::internal::Benchmark* benchmark);
typedef bool (*IsaCheckFunction)(benchmark::State& state);
// Check if either ARM VFPv2 or VFPv3 extension is supported.
// If VFP is unsupported, report error in benchmark state, and return false.
bool CheckVFP(benchmark::State& state);
// Check if ARM NEON-FP16-ARITH extension is supported.
// If NEON-FP16-ARITH is unsupported, report error in benchmark state, and return false.
bool CheckNEONFP16ARITH(benchmark::State& state);
// Check if ARM NEON extension is supported.
// If NEON is unsupported, report error in benchmark state, and return false.
bool CheckNEON(benchmark::State& state);
// Check if ARM NEON-FMA extension is supported.
// If NEON-FMA is unsupported, report error in benchmark state, and return false.
bool CheckNEONFMA(benchmark::State& state);
// Check if ARM DOT extension is supported.
// If DOT is unsupported, report error in benchmark state, and return false.
bool CheckNEONDOT(benchmark::State& state);
// Check if x86 SSSE3 extension is supported.
// If SSSE3 is unsupported, report error in benchmark state, and return false.
bool CheckSSSE3(benchmark::State& state);
// Check if x86 SSE4.1 extension is supported.
// If SSE4.1 is unsupported, report error in benchmark state, and return false.
bool CheckSSE41(benchmark::State& state);
// Check if x86 AVX extension is supported.
// If AVX is unsupported, report error in benchmark state, and return false.
bool CheckAVX(benchmark::State& state);
// Check if x86 XOP extension is supported.
// If XOP is unsupported, report error in benchmark state, and return false.
bool CheckXOP(benchmark::State& state);
// Check if x86 FMA3 extension is supported.
// If FMA3 is unsupported, report error in benchmark state, and return false.
bool CheckFMA3(benchmark::State& state);
// Check if x86 AVX2 extension is supported.
// If AVX2 is unsupported, report error in benchmark state, and return false.
bool CheckAVX2(benchmark::State& state);
// Check if x86 AVX512F extension is supported.
// If AVX512F is unsupported, report error in benchmark state, and return false.
bool CheckAVX512F(benchmark::State& state);
// Check if x86 SKX-level AVX512 extensions (AVX512F, AVX512CD, AVX512BW, AVX512DQ, and AVX512VL) are supported.
// If SKX-level AVX512 extensions are unsupported, report error in benchmark state, and return false.
bool CheckAVX512SKX(benchmark::State& state);
template <class T>
inline T DivideRoundUp(T x, T q) {
return x / q + T(x % q != 0);
}
template <class T>
inline T RoundUp(T x, T q) {
return q * DivideRoundUp(x, q);
}
template <class T>
inline T Doz(T a, T b) {
return a >= b ? a - b : T(0);
}
} // namespace utils
} // namespace benchmark