diff options
| author | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2015-06-17 16:09:10 -0700 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2015-06-20 18:15:01 +0200 |
| commit | 7c35af2bc3152cfc678561465f60884d56380632 (patch) | |
| tree | 09ef7dad1711f8791e1eac48307d3b888ba4a9c9 /src | |
| parent | 7979dc09a84c653d507b776c0c2bbc1f06c570c5 (diff) | |
x86: make memcpy 64bit safe
This does not optimize memcpy for 64bit, it merely makes it compile.
Change-Id: I69ad6bd0c3d5f617d9222643abf7a2ba7c2a0359
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Signed-off-by: Scott Duplichan <scott@notabs.org>
Reviewed-on: http://review.coreboot.org/10575
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
Diffstat (limited to 'src')
| -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) |