64 lines
2.1 KiB
ArmAsm
64 lines
2.1 KiB
ArmAsm
/* $NetBSD: bcopy.s,v 1.2 1998/01/05 20:51:28 perry Exp $ */
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/*
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* Copyright (c) 1996 Ignatios Souvatzis
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* All rights reserved.
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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 Ignatios Souvatzis
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* for the NetBSD project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Small but possibly slow bcopy/memcpy combo.
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*/
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.text
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.even
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.globl _bcopy,_memcpy
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_memcpy:
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movel sp@(4),a0
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movel sp@(8),a1
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jra Lcpy
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_bcopy:
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movel sp@(4),a1
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movel sp@(8),a0
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Lcpy:
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movel sp@(12),d0
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jeq L1
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cmpl a1,a0
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jcc L3
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L4:
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moveb a1@+,a0@+
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subql #1,d0
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jne L4
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rts
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L3:
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addl d0,a1
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addl d0,a0
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L9:
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moveb a1@-,a0@-
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subql #1,d0
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jne L9
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L1:
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rts
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