feat: generic_kits: Add X64Chrono inside BenchKit.

refactor: libSystem: Refactored as a whole.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

2 files changed, 54 insertions, 9 deletions

diff --git a/dev/generic_kits/BenchKit/HardwareChrono.h b/dev/generic_kits/BenchKit/HardwareChrono.h
deleted file mode 100644
index f6f6fd8c..00000000
--- a/dev/generic_kits/BenchKit/HardwareChrono.h
+++ /dev/null
@@ -1,9 +0,0 @@
-/* -------------------------------------------
-
-Copyright (C) 2025, Amlal El Mahrouss, all rights reserved.
-
-------------------------------------------- */
-
-#pragma once
-
-#include <BenchKit/Chrono.h>
diff --git a/dev/generic_kits/BenchKit/X64Chrono.h b/dev/generic_kits/BenchKit/X64Chrono.h
new file mode 100644
index 00000000..192d1697
--- /dev/null
+++ b/dev/generic_kits/BenchKit/X64Chrono.h
@@ -0,0 +1,54 @@
+/* -------------------------------------------
+
+Copyright (C) 2025, Amlal El Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#pragma once
+
+#include <generic_kits/BenchKit/Chrono.h>
+
+#if defined(__NE_AMD64__)
+
+namespace Kernel {
+class X64Chrono;
+struct X64ChronoTraits;
+
+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 : public ChronoInterface {
+ 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 fStart - fStop; }
+
+ private:
+  UInt64 fStart = 0;
+  UInt64 fStop  = 0;
+};
+}  // namespace Kernel
+
+#endif  // defined(__NE_AMD64__)
\ No newline at end of file