61 lines
2.5 KiB
ArmAsm
61 lines
2.5 KiB
ArmAsm
/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1980, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah Hdr: locore.s 1.58 91/04/22
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* from: @(#)locore.s 7.11 (Berkeley) 5/9/91
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* $Id: locc.S,v 1.1 1993/10/13 05:41:02 cgd Exp $
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*/
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#include "DEFS.h"
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/*
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* Emulate fancy VAX string operations:
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* locc(mask, count, startc)
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*/
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ENTRY(locc)
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movl sp@(8),d0 | get length
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jeq Llcdone | nothing to do, return
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movb sp@(7),d1 | mask to use
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movl sp@(12),a0 | where to start
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subqw #1,d0 | adjust for dbcc
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Llcloop:
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cmpb a0@+,d1 | compate with mask
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dbeq d0,Llcloop | keep going til no more or non-zero
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addqw #1,d0 | overshot by one
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Llcdone:
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rts
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