1/* $NetBSD: scanc.S,v 1.10 2014/03/18 18:20:43 riastradh Exp $ */ 2 3/* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1980, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah Hdr: locore.s 1.58 91/04/22 37 * @(#)locore.s 7.11 (Berkeley) 5/9/91 38 */ 39 40#include "DEFS.h" 41 42/* 43 * Emulate fancy VAX string operations: 44 * scanc(count, startc, table, mask) 45 */ 46ENTRY(scanc) 47 movl 4(%sp),%d0 | get length 48 jeq Lscdone | nothing to do, return 49 movl 8(%sp),%a0 | start of scan 50 movl 12(%sp),%a1 | table to compare with 51 movb 19(%sp),%d1 | and mask to use 52 movl %d2,-(%sp) | need a scratch register 53 clrl %d2 | clear it out 54#ifndef __mcoldfire__ 55 subqw #1,%d0 | adjust for dbra 56#endif 57Lscloop: 58 movb (%a0)+,%d2 | get character 59 movb (%a1,%d2),%d2 | get table entry 60 andl %d1,%d2 | mask it 61#ifdef __mcoldfire__ 62 jne 1f | break out if mask matched 63 subql #1,%d0 | decrement 64 jne Lscloop | keep going til no more 651: 66#else 67 dbne %d0,Lscloop | keep going til no more or non-zero 68 addqw #1,%d0 | overshot by one 69#endif 70 movl (%sp)+,%d2 | restore scratch 71Lscdone: 72 rts 73