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/* -------------------------------------------
Copyright (C) 2025, Amlal El Mahrouss, all rights reserved.
------------------------------------------- */
#pragma once
#include <misc/BenchKit/Chrono.h>
#if defined(__NE_AMD64__)
namespace Kernel {
class X64Chrono;
struct X64ChronoTraits;
/// @brief BenchKit chrono logic for x64.
struct X64ChronoTraits {
private:
STATIC UInt64 TickImpl_(void) {
UInt64 a = 0, d = 0;
asm volatile("rdtsc" : "=a"(a), "=d"(d));
return (d << 32) | a;
}
friend X64Chrono;
};
/// @brief X86_64 hardware chrono implementation using the `rdtsc` instruction.
class X64Chrono BENCHKIT_INTERFACE {
public:
X64Chrono() = default;
~X64Chrono() override = default;
NE_COPY_DEFAULT(X64Chrono)
public:
Void Start() override { fStart = X64ChronoTraits::TickImpl_(); }
Void Stop() override { fStop = X64ChronoTraits::TickImpl_(); }
Void Reset() override {
fStart = 0;
fStop = 0;
}
UInt64 GetElapsedTime() const override { return fStop - fStart; }
private:
UInt64 fStart{};
UInt64 fStop{};
};
} // namespace Kernel
#endif // defined(__NE_AMD64__)
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