forked from OSchip/llvm-project
67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
//===-------- Benchmark memset implementation -----------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "LibcBenchmark.h"
|
|
#include "LibcMemoryBenchmark.h"
|
|
#include "LibcMemoryBenchmarkMain.h"
|
|
#include "llvm/ADT/StringSwitch.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
namespace llvm {
|
|
namespace libc_benchmarks {
|
|
|
|
// The context encapsulates the buffers, parameters and the measure.
|
|
struct MemsetContext : public BenchmarkRunner {
|
|
using FunctionPrototype = void *(*)(void *, int, size_t);
|
|
|
|
struct ParameterType {
|
|
uint16_t DstOffset = 0;
|
|
};
|
|
|
|
explicit MemsetContext(const StudyConfiguration &Conf)
|
|
: OD(Conf), DstBuffer(Conf.BufferSize), MemsetValue(Conf.MemsetValue),
|
|
PP(*this) {}
|
|
|
|
// Needed by the ParameterProvider to update the current batch of parameter.
|
|
void Randomize(MutableArrayRef<ParameterType> Parameters) {
|
|
for (auto &P : Parameters) {
|
|
P.DstOffset = OD(Gen);
|
|
}
|
|
}
|
|
|
|
ArrayRef<StringRef> getFunctionNames() const override {
|
|
static std::array<StringRef, 1> kFunctionNames = {"memset"};
|
|
return kFunctionNames;
|
|
}
|
|
|
|
BenchmarkResult benchmark(const BenchmarkOptions &Options,
|
|
StringRef FunctionName, size_t Size) override {
|
|
FunctionPrototype Function =
|
|
StringSwitch<FunctionPrototype>(FunctionName).Case("memset", &::memset);
|
|
return llvm::libc_benchmarks::benchmark(
|
|
Options, PP, [this, Function, Size](ParameterType p) {
|
|
Function(DstBuffer + p.DstOffset, MemsetValue, Size);
|
|
return DstBuffer + p.DstOffset;
|
|
});
|
|
}
|
|
|
|
private:
|
|
std::default_random_engine Gen;
|
|
OffsetDistribution OD;
|
|
AlignedBuffer DstBuffer;
|
|
const uint8_t MemsetValue;
|
|
SmallParameterProvider<MemsetContext> PP;
|
|
};
|
|
|
|
std::unique_ptr<BenchmarkRunner> getRunner(const StudyConfiguration &Conf) {
|
|
return std::make_unique<MemsetContext>(Conf);
|
|
}
|
|
|
|
} // namespace libc_benchmarks
|
|
} // namespace llvm
|