minor performance improvements, optional mouse, mouse cursor now drawn

[dosdemo] / src / util.h

diff --git a/src/util.h b/src/util.h
index eb3773d..b305d78 100644 (file)
--- a/src/util.h
+++ b/src/util.h
@@ -5,12 +5,15 @@
 
 #ifdef __GNUC__
 #define INLINE __inline
+#define PACKED __attribute__((packed))
 
 #elif defined(__WATCOMC__)
 #define INLINE __inline
+#define PACKED
 
 #else
 #define INLINE
+#define PACKED
 #endif
 
 /* fast conversion of double -> 32bit int
@@ -24,4 +27,104 @@ static INLINE int32_t cround64(double val)
        return *(int32_t*)&val;
 }
 
+extern uint32_t perf_start_count, perf_interval_count;
+
+#ifdef __WATCOMC__
+void perf_start(void);
+#pragma aux perf_start = \
+       "xor eax, eax" \
+       "cpuid" \
+       "rdtsc" \
+       "mov [perf_start_count], eax" \
+       modify[eax ebx ecx edx];
+
+void perf_end(void);
+#pragma aux perf_end = \
+       "xor eax, eax" \
+       "cpuid" \
+       "rdtsc" \
+       "sub eax, [perf_start_count]" \
+       "mov [perf_interval_count], eax" \
+       modify [eax ebx ecx edx];
+
+void debug_break(void);
+#pragma aux debug_break = "int 3";
+
+void halt(void);
+#pragma aux halt = "hlt";
+
+void memset16(void *ptr, int val, int count);
+#pragma aux memset16 = \
+       "rep stosw" \
+       parm[edi][eax][ecx];
+#endif
+
+#ifdef __GNUC__
+#define perf_start()  asm volatile ( \
+       "xor %%eax, %%eax\n" \
+       "cpuid\n" \
+       "rdtsc\n" \
+       "mov %%eax, %0\n" \
+       : "=m"(perf_start_count) \
+       :: "%eax", "%ebx", "%ecx", "%edx")
+
+#define perf_end() asm volatile ( \
+       "xor %%eax, %%eax\n" \
+       "cpuid\n" \
+       "rdtsc\n" \
+       "sub %1, %%eax\n" \
+       "mov %%eax, %0\n" \
+       : "=m"(perf_interval_count) \
+       : "m"(perf_start_count) \
+       : "%eax", "%ebx", "%ecx", "%edx")
+
+#define debug_break() \
+       asm volatile ("int $3")
+
+#define halt() \
+       asm volatile("hlt")
+
+#define memset16(ptr, val, count) asm volatile ( \
+       "rep stosw\n\t" \
+       :: "D"(ptr), "a"(val), "c"(count))
+#endif
+
+#ifdef _MSC_VER
+#define perf_start() \
+       do { \
+               __asm { \
+                       xor eax, eax \
+                       cpuid \
+                       rdtsc \
+                       mov [perf_start_count], eax \
+               } \
+       } while(0)
+
+#define perf_end() \
+       do { \
+               __asm { \
+                       xor eax, eax \
+                       cpuid \
+                       rdtsc \
+                       sub eax, [perf_start_count] \
+                       mov [perf_interval_count], eax \
+               } \
+       } while(0)
+
+#define debug_break() \
+       do { \
+               __asm { int 3 } \
+       } while(0)
+
+#define memset16(ptr, val, count) \
+       do { \
+               __asm { \
+                       mov edi, ptr \
+                       mov ecx, count \
+                       mov eax, val \
+                       rep stosw \
+               } \
+       } while(0)
+#endif
+
 #endif /* UTIL_H_ */