/*      $NetBSD: scanc.S,v 1.10 2014/03/18 18:20:43 riastradh Exp $     */

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1980, 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, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      from: Utah Hdr: locore.s 1.58 91/04/22
 *      @(#)locore.s    7.11 (Berkeley) 5/9/91
 */

#include "DEFS.h"

/*
 * Emulate fancy VAX string operations:
 *      scanc(count, startc, table, mask)
 */
ENTRY(scanc)
        movl    4(%sp),%d0      | get length
        jeq     Lscdone         | nothing to do, return
        movl    8(%sp),%a0      | start of scan
        movl    12(%sp),%a1     | table to compare with
        movb    19(%sp),%d1     | and mask to use
        movl    %d2,-(%sp)      | need a scratch register
        clrl    %d2             | clear it out
#ifndef __mcoldfire__
        subqw   #1,%d0          | adjust for dbra
#endif
Lscloop:
        movb    (%a0)+,%d2      | get character
        movb    (%a1,%d2),%d2   | get table entry
        andl    %d1,%d2         | mask it
#ifdef __mcoldfire__
        jne     1f              | break out if mask matched
        subql   #1,%d0          | decrement
        jne     Lscloop         | keep going til no more
1:
#else
        dbne    %d0,Lscloop     | keep going til no more or non-zero
        addqw   #1,%d0          | overshot by one
#endif
        movl    (%sp)+,%d2      | restore scratch
Lscdone:
        rts