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#include <library/cpp/testing/benchmark/bench.h>
#include <util/generic/vector.h>
#include <util/generic/xrange.h>
#include <util/generic/singleton.h>
#include <util/random/fast.h>
namespace {
template <typename T>
struct TExample {
T Value;
ui8 Shift;
};
template <typename T, size_t N>
struct TExamplesHolder {
TExamplesHolder()
: Examples(N)
{
TFastRng<ui64> prng{42u * sizeof(T) * N};
for (auto& e : Examples) {
e.Value = prng();
e.Shift = prng() % (8 * sizeof(T));
}
}
TVector<TExample<T>> Examples;
};
}
#define DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(type, count) \
Y_CPU_BENCHMARK(LeftRotate_##type##_##count, iface) { \
const auto& examples = Default<TExamplesHolder<type, count>>().Examples; \
for (const auto i : xrange(iface.Iterations())) { \
Y_UNUSED(i); \
for (const auto e : examples) { \
Y_DO_NOT_OPTIMIZE_AWAY(RotateBitsLeft(e.Value, e.Shift)); \
} \
} \
} \
\
Y_CPU_BENCHMARK(RightRotate_##type##_##count, iface) { \
const auto& examples = Default<TExamplesHolder<type, count>>().Examples; \
for (const auto i : xrange(iface.Iterations())) { \
Y_UNUSED(i); \
for (const auto e : examples) { \
Y_DO_NOT_OPTIMIZE_AWAY(RotateBitsRight(e.Value, e.Shift)); \
} \
} \
}
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui8, 1)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui8, 10)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui8, 100)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui16, 1)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui16, 10)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui16, 100)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui32, 1)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui32, 10)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui32, 100)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui64, 1)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui64, 10)
DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES(ui64, 100)
#undef DEFINE_BENCHMARKS_FOR_UNSIGNED_TYPES
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