usr/src/lib/libc/hp300/string/index.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.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
        .asciz "@(#)index.s     5.1 (Berkeley) %G%"
#endif /* LIBC_SCCS and not lint */

#include "DEFS.h"

ENTRY(index)
        movl    sp@(4),a0       /* string */
        movb    sp@(11),d0      /* char to look for */
ixloop:
        cmpb    a0@,d0          /* found our char? */
        jeq     ixfound         /* yes, break out */
        tstb    a0@+            /* null? */
        jne     ixloop          /* no, keep going */
        moveq   #0,d0           /* not found, return null */
        rts
ixfound:
        movl    a0,d0           /* found, return pointer */
        rts