/* $NetBSD: skpc.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: * skpc(mask, count, startc) */ ENTRY(skpc) movl 8(%sp),%d0 | get length jeq Lskdone | nothing to do, return movb 7(%sp),%d1 | mask to use movl 12(%sp),%a0 | where to start #ifndef __mcoldfire__ subqw #1,%d0 | adjust for dbcc #endif Lskloop: cmpb (%a0)+,%d1 | compare with mask #ifdef __mcoldfire__ jne Lskdone | keep going til no more or zero subql #1,%d0 jne Lskloop #else dbne %d0,Lskloop | keep going til no more or zero addqw #1,%d0 | overshot by one #endif Lskdone: rts |