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>
diff --git a/src/arch/x86/lib/memcpy.c b/src/arch/x86/lib/memcpy.c
index 7f079ce..4915a9e 100644
--- a/src/arch/x86/lib/memcpy.c
+++ b/src/arch/x86/lib/memcpy.c
@@ -5,8 +5,13 @@
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)