mirror of
https://github.com/GerbilSoft/zlib-ng.git
synced 2025-06-18 11:35:35 -04:00
509f6b5818
it is time to replace the UNALIGNED_OK checks that have since really only been used to select the optimal comparison sizes for the arch instead.
73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
/* benchmark_compare256_rle.cc -- benchmark compare256_rle variants
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* Copyright (C) 2022 Nathan Moinvaziri
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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#include <stdio.h>
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#include <benchmark/benchmark.h>
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extern "C" {
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# include "zbuild.h"
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# include "zutil_p.h"
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# include "compare256_rle.h"
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}
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#define MAX_COMPARE_SIZE (256)
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class compare256_rle: public benchmark::Fixture {
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private:
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uint8_t *str1;
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uint8_t *str2;
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public:
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void SetUp(const ::benchmark::State& state) {
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str1 = (uint8_t *)zng_alloc(MAX_COMPARE_SIZE);
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assert(str1 != NULL);
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memset(str1, 'a', MAX_COMPARE_SIZE);
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str2 = (uint8_t *)zng_alloc(MAX_COMPARE_SIZE);
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assert(str2 != NULL);
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memset(str2, 'a', MAX_COMPARE_SIZE);
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}
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void Bench(benchmark::State& state, compare256_rle_func compare256_rle) {
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int32_t match_len = (int32_t)state.range(0) - 1;
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uint32_t len;
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str2[match_len] = 0;
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for (auto _ : state) {
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len = compare256_rle((const uint8_t *)str1, (const uint8_t *)str2);
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}
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str2[match_len] = 'a';
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benchmark::DoNotOptimize(len);
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}
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void TearDown(const ::benchmark::State& state) {
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zng_free(str1);
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zng_free(str2);
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}
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};
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#define BENCHMARK_COMPARE256_RLE(name, fptr, support_flag) \
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BENCHMARK_DEFINE_F(compare256_rle, name)(benchmark::State& state) { \
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if (!support_flag) { \
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state.SkipWithError("CPU does not support " #name); \
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} \
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Bench(state, fptr); \
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} \
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BENCHMARK_REGISTER_F(compare256_rle, name)->Range(1, MAX_COMPARE_SIZE);
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BENCHMARK_COMPARE256_RLE(c, compare256_rle_c, 1);
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#if BYTE_ORDER == LITTLE_ENDIAN && OPTIMAL_CMP >= 32
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BENCHMARK_COMPARE256_RLE(unaligned_16, compare256_rle_unaligned_16, 1);
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# if defined(HAVE_BUILTIN_CTZ)
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BENCHMARK_COMPARE256_RLE(unaligned_32, compare256_rle_unaligned_32, 1);
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# endif
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# if defined(HAVE_BUILTIN_CTZLL) && OPTIMAL_CMP >= 64
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BENCHMARK_COMPARE256_RLE(unaligned_64, compare256_rle_unaligned_64, 1);
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# endif
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#endif
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