usr/src/lib/libc/hp300/string/rindex.s

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that: (1) source distributions retain this entire copyright
 * notice and comment, and (2) distributions including binaries display
 * the following acknowledgement:  ``This product includes software
 * developed by the University of California, Berkeley and its contributors''
 * in the documentation or other materials provided with the distribution
 * and in all advertising materials mentioning features or use of this
 * software. Neither the name of the University nor the names of its
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
        .asciz "@(#)rindex.s    5.1 (Berkeley) 5/12/90"
#endif /* LIBC_SCCS and not lint */

#include "DEFS.h"

ENTRY(rindex)
        movl    sp@(4),a0       /* string */
        movb    sp@(11),d0      /* char to look for */
        subl    a1,a1           /* clear rindex pointer */
rixloop:
        cmpb    a0@,d0          /* found our char? */
        jne     rixnope         /* no, check for null */
        movl    a0,a1           /* yes, remember location */
rixnope:
        tstb    a0@+            /* null? */
        jne     rixloop         /* no, keep going */
        movl    a1,d0           /* return value */
        rts