X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Futil.h;h=b305d78697816a40303d98f012219d92750a2ddd;hp=6d869ebec22169441afcde79fb10f102e8220e47;hb=e8b26db00c934d141f16652cb8dcbeae23b17e48;hpb=2c4602e53eaab44272ea5cd62667c939e6d2f61b

diff --git a/src/util.h b/src/util.h
index 6d869eb..b305d78 100644
--- a/src/util.h
+++ b/src/util.h
@@ -49,6 +49,14 @@ void perf_end(void);
 
 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__
@@ -72,6 +80,13 @@ void debug_break(void);
 
 #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
@@ -100,6 +115,16 @@ void debug_break(void);
 	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_ */