Use stosl in memset; makes boot time bearable

1 files changed, 9 insertions, 0 deletions

diff --git a/x86.h b/x86.h
index 828d5bc..0c3feae 100644
--- a/x86.h
+++ b/x86.h
@@ -48,6 +48,15 @@ stosb(void *addr, int data, int cnt)
                "memory", "cc");
 }
 
+static inline void
+stosl(void *addr, int data, int cnt)
+{
+  asm volatile("cld; rep stosl" :
+               "=D" (addr), "=c" (cnt) :
+               "0" (addr), "1" (cnt), "a" (data) :
+               "memory", "cc");
+}
+
 struct segdesc;
 
 static inline void