30 lines
502 B
ArmAsm
30 lines
502 B
ArmAsm
/*
|
|
* 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>
|
|
|
|
#if defined(LIBC_SCCS)
|
|
RCSID("$NetBSD: index.S,v 1.1 2001/06/19 00:22:46 fvdl Exp $")
|
|
#endif
|
|
|
|
#ifdef STRCHR
|
|
ENTRY(strchr)
|
|
#else
|
|
ENTRY(index)
|
|
#endif
|
|
movq %rdi,%rax
|
|
movb %sil,%cl
|
|
L1:
|
|
movb (%rax),%dl
|
|
cmpb %dl,%cl /* found char? */
|
|
je L2
|
|
incq %rax
|
|
testb %dl,%dl /* null terminator? */
|
|
jnz L1
|
|
xorq %rax,%rax
|
|
L2:
|
|
ret
|