| /* benchmark_compare256.cc -- benchmark compare256 variants |
| * Copyright (C) 2022 Nathan Moinvaziri |
| * For conditions of distribution and use, see copyright notice in zlib.h |
| */ |
| |
| #include <stdio.h> |
| |
| #include <benchmark/benchmark.h> |
| |
| extern "C" { |
| # include "zbuild.h" |
| # include "zutil_p.h" |
| # include "cpu_features.h" |
| } |
| |
| #define MAX_COMPARE_SIZE (256) |
| |
| class compare256: public benchmark::Fixture { |
| private: |
| uint8_t *str1; |
| uint8_t *str2; |
| |
| public: |
| void SetUp(const ::benchmark::State& state) { |
| str1 = (uint8_t *)zng_alloc(MAX_COMPARE_SIZE); |
| assert(str1 != NULL); |
| memset(str1, 'a', MAX_COMPARE_SIZE); |
| |
| str2 = (uint8_t *)zng_alloc(MAX_COMPARE_SIZE); |
| assert(str2 != NULL); |
| memset(str2, 'a', MAX_COMPARE_SIZE); |
| } |
| |
| void Bench(benchmark::State& state, compare256_func compare256) { |
| int32_t match_len = (int32_t)state.range(0) - 1; |
| uint32_t len; |
| |
| str2[match_len] = 0; |
| for (auto _ : state) { |
| len = compare256((const uint8_t *)str1, (const uint8_t *)str2); |
| } |
| str2[match_len] = 'a'; |
| |
| benchmark::DoNotOptimize(len); |
| } |
| |
| void TearDown(const ::benchmark::State& state) { |
| zng_free(str1); |
| zng_free(str2); |
| } |
| }; |
| |
| #define BENCHMARK_COMPARE256(name, fptr, support_flag) \ |
| BENCHMARK_DEFINE_F(compare256, name)(benchmark::State& state) { \ |
| if (!support_flag) { \ |
| state.SkipWithError("CPU does not support " #name); \ |
| } \ |
| Bench(state, fptr); \ |
| } \ |
| BENCHMARK_REGISTER_F(compare256, name)->Range(1, MAX_COMPARE_SIZE); |
| |
| BENCHMARK_COMPARE256(c, compare256_c, 1); |
| |
| #ifdef UNALIGNED_OK |
| BENCHMARK_COMPARE256(unaligned_16, compare256_unaligned_16, 1); |
| #ifdef HAVE_BUILTIN_CTZ |
| BENCHMARK_COMPARE256(unaligned_32, compare256_unaligned_32, 1); |
| #endif |
| #if defined(UNALIGNED64_OK) && defined(HAVE_BUILTIN_CTZLL) |
| BENCHMARK_COMPARE256(unaligned_64, compare256_unaligned_64, 1); |
| #endif |
| #endif |
| #if defined(X86_SSE2) && defined(HAVE_BUILTIN_CTZ) |
| BENCHMARK_COMPARE256(sse2, compare256_sse2, x86_cpu_has_sse2); |
| #endif |
| #if defined(X86_AVX2) && defined(HAVE_BUILTIN_CTZ) |
| BENCHMARK_COMPARE256(avx2, compare256_avx2, x86_cpu_has_avx2); |
| #endif |
| #if defined(ARM_NEON) && defined(HAVE_BUILTIN_CTZLL) |
| BENCHMARK_COMPARE256(neon, compare256_neon, arm_cpu_has_neon); |
| #endif |
| #ifdef POWER9 |
| BENCHMARK_COMPARE256(power9, compare256_power9, power_cpu_has_arch_3_00); |
| #endif |