/*      $OpenBSD: bcmp.S,v 1.6 2022/12/04 08:22:13 tb Exp $ */
/*
 * Written by J.T. Conklin <jtc@netbsd.org>.
 * Public domain.
 */

#include "DEFS.h"

ENTRY_NB(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
END_WEAK(bcmp)