48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
#include <benchmark/benchmark.h>
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#include <fxdiv.h>
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static void fxdiv_round_down_uint32_t(benchmark::State& state) {
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const fxdiv_divisor_uint32_t multiple = fxdiv_init_uint32_t(UINT32_C(65537));
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uint32_t x = 0;
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while (state.KeepRunning()) {
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const uint32_t rounded_x = fxdiv_round_down_uint32_t(x++, multiple);
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benchmark::DoNotOptimize(rounded_x);
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}
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}
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BENCHMARK(fxdiv_round_down_uint32_t);
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static void fxdiv_round_down_uint64_t(benchmark::State& state) {
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const fxdiv_divisor_uint64_t multiple = fxdiv_init_uint64_t(UINT64_C(4294967311));
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uint64_t x = 0;
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while (state.KeepRunning()) {
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const uint64_t rounded_x = fxdiv_round_down_uint64_t(x++, multiple);
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benchmark::DoNotOptimize(rounded_x);
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}
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}
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BENCHMARK(fxdiv_round_down_uint64_t);
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static void native_round_down_uint32_t(benchmark::State& state) {
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uint32_t multiple = UINT32_C(65537);
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benchmark::DoNotOptimize(&multiple);
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uint32_t x = 0;
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while (state.KeepRunning()) {
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const uint32_t rounded_x = x++ / multiple * multiple;
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benchmark::DoNotOptimize(rounded_x);
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}
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}
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BENCHMARK(native_round_down_uint32_t);
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static void native_round_down_uint64_t(benchmark::State& state) {
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uint64_t multiple = UINT64_C(4294967311);
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benchmark::DoNotOptimize(&multiple);
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uint64_t x = 0;
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while (state.KeepRunning()) {
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const uint64_t rounded_x = x++ / multiple * multiple;
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benchmark::DoNotOptimize(rounded_x);
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}
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}
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BENCHMARK(native_round_down_uint64_t);
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BENCHMARK_MAIN();
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