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NetBSD/lib/libc/arch/i386/string/strlen.S

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make an arch directory in libc, and move all machine dirs into it
1993-10-07 03:17:24 +03:00
/*
Winning Strategies has placed this code into the Public Domain
1995-04-29 02:53:59 +04:00
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
make an arch directory in libc, and move all machine dirs into it
1993-10-07 03:17:24 +03:00
*/
Use RCSID macro for RCS ID's.
1994-03-12 04:39:55 +03:00
#include <machine/asm.h>
Change instances of LIBC_RCS back to LIBC_SCCS. If we are going to change th LIBC_RCS, the entire source tree should be updated at once. Remove && !defined(lint) from conditionals around rcs id's. No one is ever going to pass a *.s file through lint.
1993-10-21 04:39:55 +03:00
#if defined(LIBC_SCCS)
Winning Strategies has placed this code into the Public Domain
1995-04-29 02:53:59 +04:00
RCSID("$Id: strlen.S,v 1.5 1995/04/28 22:54:35 jtc Exp $")
Change instances of LIBC_RCS back to LIBC_SCCS. If we are going to change th LIBC_RCS, the entire source tree should be updated at once. Remove && !defined(lint) from conditionals around rcs id's. No one is ever going to pass a *.s file through lint.
1993-10-21 04:39:55 +03:00
#endif
make an arch directory in libc, and move all machine dirs into it
1993-10-07 03:17:24 +03:00
ENTRY(strlen)
pushl %edi
movl 8(%esp),%edi /* string address */
cld /* set search forward */
xorl %eax,%eax /* set search for null terminator */
movl $-1,%ecx /* set search for lots of characters */
repne /* search! */
scasb
notl %ecx /* get length by taking complement */
leal -1(%ecx),%eax /* and subtracting one */
popl %edi
ret