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index.S revision 1.13 
      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: index.S,v 1.13 2005/02/07 05:22:51 christos Exp $")
     10 #endif
     11 
     12 #ifdef STRCHR
     13 ENTRY(strchr)
     14 #else
     15 ENTRY(index)
     16 #endif
     17 	movl	4(%esp),%eax
     18 	movb	8(%esp),%cl
     19 	_ALIGN_TEXT,0x90
     20 L1:
     21 	movb	(%eax),%dl
     22 	cmpb	%dl,%cl			/* found char??? */
     23 	je 	L2
     24 	incl	%eax
     25 	testb	%dl,%dl			/* null terminator??? */
     26 	jnz	L1
     27 	xorl	%eax,%eax
     28 L2:
     29 	ret
     30