MiMoEngine ASM: x86-64 MASM汇编+C混合架构游戏引擎

核心热路径(数学/内存/字符串/性能分析)用MASM汇编(SSE/AVX2)
外围系统(窗口/渲染/ECS/音频/UI/脚本)用C语言
含自研编辑器、VisualScript积木编程、中文渲染(glyph_atlas)

Engine/Core/timer.c

@@ -0,0 +1,78 @@
+// ============================================================================
+// timer.c - 高精度计时器实现 (使用 rdtsc.asm)
+// ============================================================================
+
+#include "timer.h"
+#include "../include/engine_api.h"
+#include <Windows.h>
+
+static double g_seconds_per_count = 0.0;
+static int64_t g_prev_time = 0;
+static int64_t g_curr_time = 0;
+static int64_t g_start_time = 0;
+static double g_delta_time = 0.0;
+static double g_total_time = 0.0;
+static double g_fps = 0.0;
+static uint64_t g_frame_count = 0;
+static double g_fps_accumulator = 0.0;
+static uint64_t g_fps_frame_count = 0;
+
+void timer_init(void) {
+    // 使用 QueryPerformanceCounter 获取高精度时间
+    LARGE_INTEGER freq;
+    QueryPerformanceFrequency(&freq);
+    g_seconds_per_count = 1.0 / (double)freq.QuadPart;
+
+    LARGE_INTEGER now;
+    QueryPerformanceCounter(&now);
+    g_start_time = now.QuadPart;
+    g_prev_time = now.QuadPart;
+    g_curr_time = now.QuadPart;
+
+    g_delta_time = 0.0;
+    g_total_time = 0.0;
+    g_fps = 0.0;
+    g_frame_count = 0;
+    g_fps_accumulator = 0.0;
+    g_fps_frame_count = 0;
+}
+
+void timer_reset(void) {
+    timer_init();
+}
+
+void timer_tick(void) {
+    LARGE_INTEGER now;
+    QueryPerformanceCounter(&now);
+    g_curr_time = now.QuadPart;
+
+    g_delta_time = (g_curr_time - g_prev_time) * g_seconds_per_count;
+    g_total_time = (g_curr_time - g_start_time) * g_seconds_per_count;
+    g_prev_time = g_curr_time;
+
+    g_frame_count++;
+    g_fps_frame_count++;
+    g_fps_accumulator += g_delta_time;
+
+    if (g_fps_accumulator >= 1.0) {
+        g_fps = (double)g_fps_frame_count / g_fps_accumulator;
+        g_fps_frame_count = 0;
+        g_fps_accumulator = 0.0;
+    }
+}
+
+double timer_get_delta(void) {
+    return g_delta_time;
+}
+
+double timer_get_total(void) {
+    return g_total_time;
+}
+
+double timer_get_fps(void) {
+    return g_fps;
+}
+
+uint64_t timer_get_frame_count(void) {
+    return g_frame_count;
+}