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bcmp.S revision 1.9 
      1  1.1   cgd /*
      2  1.8  salo  * Written by J.T. Conklin <jtc (at) NetBSD.org>.
      3  1.6   jtc  * Public domain.
      4  1.1   cgd  */
      5  1.1   cgd 
      6  1.4   jtc #include <machine/asm.h>
      7  1.4   jtc 
      8  1.2   jtc #if defined(LIBC_SCCS)
      9  1.9    ad 	RCSID("$NetBSD: bcmp.S,v 1.9 2007/11/12 18:41:59 ad Exp $")
     10  1.2   jtc #endif
     11  1.1   cgd 
     12  1.1   cgd ENTRY(bcmp)
     13  1.1   cgd 	pushl	%edi
     14  1.1   cgd 	pushl	%esi
     15  1.1   cgd 	movl	12(%esp),%edi
     16  1.1   cgd 	movl	16(%esp),%esi
     17  1.1   cgd 	xorl	%eax,%eax		/* clear return value */
     18  1.1   cgd 
     19  1.5   jtc 	movl	20(%esp),%ecx		/* compare by words */
     20  1.1   cgd 	shrl	$2,%ecx
     21  1.1   cgd 	repe
     22  1.1   cgd 	cmpsl
     23  1.1   cgd 	jne	L1
     24  1.1   cgd 
     25  1.5   jtc 	movl	20(%esp),%ecx		/* compare remainder by bytes */
     26  1.1   cgd 	andl	$3,%ecx
     27  1.1   cgd 	repe
     28  1.1   cgd 	cmpsb
     29  1.1   cgd 	je	L2
     30  1.1   cgd 
     31  1.1   cgd L1:	incl	%eax
     32  1.1   cgd L2:	popl	%esi
     33  1.1   cgd 	popl	%edi
     34  1.1   cgd 	ret
     35