diff options
| -rw-r--r-- | src/arch/x86/lib/memcpy.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/arch/x86/lib/memcpy.c b/src/arch/x86/lib/memcpy.c index f8607cfc50..7f079ce9d6 100644 --- a/src/arch/x86/lib/memcpy.c +++ b/src/arch/x86/lib/memcpy.c @@ -5,11 +5,13 @@ void *memcpy(void *dest, const void *src, size_t n) unsigned long d0, d1, d2; asm volatile( - "rep movsb" - : "=S"(d0), "=D"(d1), "=c"(d2) - : "0"(src), "1"(dest), "2"(n) + "rep ; movsl\n\t" + "movl %4,%%ecx\n\t" + "rep ; movsb\n\t" + : "=&c" (d0), "=&D" (d1), "=&S" (d2) + : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) : "memory" - ); + ); return dest; } |