diff options
Diffstat (limited to 'lib/libc/amd64/string/bcmp.S')
| -rw-r--r-- | lib/libc/amd64/string/bcmp.S | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/libc/amd64/string/bcmp.S b/lib/libc/amd64/string/bcmp.S new file mode 100644 index 0000000..bb72035 --- /dev/null +++ b/lib/libc/amd64/string/bcmp.S @@ -0,0 +1,25 @@ +#include <machine/asm.h> +__FBSDID("$FreeBSD$"); + +#if 0 + RCSID("$NetBSD: bcmp.S,v 1.1 2001/06/19 00:25:04 fvdl Exp $") +#endif + +ENTRY(bcmp) + xorl %eax,%eax /* clear return value */ + cld /* set compare direction forward */ + + movq %rdx,%rcx /* compare by words */ + shrq $3,%rcx + repe + cmpsq + jne L1 + + movq %rdx,%rcx /* compare remainder by bytes */ + andq $7,%rcx + repe + cmpsb + je L2 + +L1: incl %eax +L2: ret |
