X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Futil.h;fp=src%2Futil.h;h=6d200b7824f14dbcff470db501150d193d6b7920;hp=f8ae175a8af4128ac6268cf8db87ed8b059e41ad;hb=8c475e1fd504f46cbb8a882e760714925c012890;hpb=95432d94ee6d5cd0c1f71c36b78e195f1b96892f

diff --git a/src/util.h b/src/util.h
index f8ae175..6d200b7 100644
--- a/src/util.h
+++ b/src/util.h
@@ -24,42 +24,53 @@ static INLINE int32_t cround64(double val)
 	return *(int32_t*)&val;
 }
 
-uint32_t perf_start_count, perf_interval_count;
+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 edx];
+	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 edx];
+	modify [eax ebx ecx edx];
 #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", "%edx")
+	: "=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", "%edx")
+	: "%eax", "%ebx", "%ecx", "%edx")
 #endif
 
 #ifdef _MSC_VER
 #define perf_start() \
 	do { \
 		__asm { \
+			xor eax, eax \
+			cpuid \
 			rdtsc \
 			mov [perf_start_count], eax \
 		} \
@@ -68,6 +79,8 @@ void perf_end(void);
 #define perf_end() \
 	do { \
 		__asm { \
+			xor eax, eax \
+			cpuid \
 			rdtsc \
 			sub eax, [perf_start_count] \
 			mov [perf_interval_count], eax \