/* $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 |