diff options
Diffstat (limited to 'src/arch/x86')
| -rw-r--r-- | src/arch/x86/lib/memcpy.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/arch/x86/lib/memcpy.c b/src/arch/x86/lib/memcpy.c index 7f079ce9d6..4915a9eb51 100644 --- a/src/arch/x86/lib/memcpy.c +++ b/src/arch/x86/lib/memcpy.c @@ -5,8 +5,13 @@ void *memcpy(void *dest, const void *src, size_t n) unsigned long d0, d1, d2; asm volatile( +#ifdef __x86_64__ + "rep ; movsd\n\t" + "mov %4,%%rcx\n\t" +#else "rep ; movsl\n\t" "movl %4,%%ecx\n\t" +#endif "rep ; movsb\n\t" : "=&c" (d0), "=&D" (d1), "=&S" (d2) : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) |