Home | History | Annotate | Line # | Download | only in string
bcmp.S revision 1.8 
      1 /*
      2  * Written by J.T. Conklin <jtc (at) NetBSD.org>.
      3  * Public domain.
      4  */
      5 
      6 #include <machine/asm.h>
      7 
      8 #if defined(LIBC_SCCS)
      9 	RCSID("$NetBSD: bcmp.S,v 1.8 2003/07/26 19:24:33 salo Exp $")
     10 #endif
     11 
     12 ENTRY(bcmp)
     13 	pushl	%edi
     14 	pushl	%esi
     15 	movl	12(%esp),%edi
     16 	movl	16(%esp),%esi
     17 	xorl	%eax,%eax		/* clear return value */
     18 	cld				/* set compare direction forward */
     19 
     20 	movl	20(%esp),%ecx		/* compare by words */
     21 	shrl	$2,%ecx
     22 	repe
     23 	cmpsl
     24 	jne	L1
     25 
     26 	movl	20(%esp),%ecx		/* compare remainder by bytes */
     27 	andl	$3,%ecx
     28 	repe
     29 	cmpsb
     30 	je	L2
     31 
     32 L1:	incl	%eax
     33 L2:	popl	%esi
     34 	popl	%edi
     35 	ret
     36