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/* $OpenBSD: strlen.S,v 1.1 2004/01/28 01:44:45 mickey Exp $ */
/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
* Adapted for NetBSD/x86_64 by Frank van der Linden <fvdl@wasabisystems.com>
*/
#include <machine/asm.h>
ENTRY(strlen)
cld /* set search forward */
xorl %eax,%eax /* set search for null terminator */
movq $-1,%rcx /* set search for lots of characters */
repne /* search! */
scasb
notq %rcx /* get length by taking complement */
leaq -1(%rcx),%rax /* and subtracting one */
ret
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