36 lines
570 B
ArmAsm
36 lines
570 B
ArmAsm
/*
|
|
* Written by J.T. Conklin <jtc@netbsd.org>.
|
|
* Public domain.
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
|
|
#if defined(LIBC_SCCS)
|
|
RCSID("$NetBSD: bcmp.S,v 1.6 1998/02/22 08:14:57 mycroft Exp $")
|
|
#endif
|
|
|
|
ENTRY(bcmp)
|
|
pushl %edi
|
|
pushl %esi
|
|
movl 12(%esp),%edi
|
|
movl 16(%esp),%esi
|
|
xorl %eax,%eax /* clear return value */
|
|
cld /* set compare direction forward */
|
|
|
|
movl 20(%esp),%ecx /* compare by words */
|
|
shrl $2,%ecx
|
|
repe
|
|
cmpsl
|
|
jne L1
|
|
|
|
movl 20(%esp),%ecx /* compare remainder by bytes */
|
|
andl $3,%ecx
|
|
repe
|
|
cmpsb
|
|
je L2
|
|
|
|
L1: incl %eax
|
|
L2: popl %esi
|
|
popl %edi
|
|
ret
|