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/* $OpenBSD: locc.S,v 1.3 2003/06/02 23:28:08 millert Exp $ */
/* $NetBSD: locc.S,v 1.2 1994/10/26 06:39:28 cgd 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:
* locc(mask, count, startc)
*/
ENTRY(locc)
movl sp@(8),d0 | get length
jeq Llcdone | nothing to do, return
movb sp@(7),d1 | mask to use
movl sp@(12),a0 | where to start
subqw #1,d0 | adjust for dbcc
Llcloop:
cmpb a0@+,d1 | compate with mask
dbeq d0,Llcloop | keep going til no more or non-zero
addqw #1,d0 | overshot by one
Llcdone:
rts
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