119 lines
3.6 KiB
ArmAsm
119 lines
3.6 KiB
ArmAsm
/* $NetBSD: copypage.s,v 1.6 1998/05/24 19:32:42 is Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by J.T. Conklin <jtc@netbsd.org> and
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* by Hiroshi Horitomo <horimoto@cs-aoi.cs.sist.ac.jp>
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Optimized functions for copying/clearing a whole page.
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*/
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#include <machine/asm.h>
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#include "assym.h"
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.file "copypage.s"
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.text
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/*
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* copypage040(fromaddr, toaddr)
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*
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* Optimized version of bcopy for a single page-aligned NBPG byte copy,
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* using instuctions only available on the mc68040 and later.
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*/
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#if defined(M68040) || defined(M68060)
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ENTRY(copypage040)
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movl sp@(4),a0 | source address
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movl sp@(8),a1 | destiniation address
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movw #NBPG/32-1,d0 | number of 32 byte chunks - 1
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Lm16loop:
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.long 0xf6209000 | move16 a0@+,a1@+
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.long 0xf6209000 | move16 a0@+,a1@+
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dbf d0,Lm16loop
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rts
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#endif /* M68040 || M68060 */
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/*
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* copypage(fromaddr, toaddr)
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*
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* Optimized version of bcopy for a single page-aligned NBPG byte copy.
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*/
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ENTRY(copypage)
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movl sp@(4),a0 | source address
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movl sp@(8),a1 | destiniation address
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movw #NBPG/32-1,d0 | number of 32 byte chunks - 1
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Lmlloop:
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movl a0@+,a1@+
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movl a0@+,a1@+
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movl a0@+,a1@+
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movl a0@+,a1@+
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movl a0@+,a1@+
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movl a0@+,a1@+
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movl a0@+,a1@+
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movl a0@+,a1@+
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dbf d0,Lmlloop
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rts
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/*
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* zeropage(addr)
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*
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* Optimized version of bzero for a single page-aligned NBPG byte zero.
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*/
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ENTRY(zeropage)
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movl sp@(4),a0 | dest address
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movql #NBPG/256-1,d0 | number of 256 byte chunks - 1
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movml d2-d7,sp@-
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movql #0,d1
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movql #0,d2
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movql #0,d3
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movql #0,d4
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movql #0,d5
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movql #0,d6
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movql #0,d7
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movl d1,a1
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lea a0@(NBPG),a0
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Lzloop:
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movml d1-d7/a1,a0@-
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movml d1-d7/a1,a0@-
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movml d1-d7/a1,a0@-
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movml d1-d7/a1,a0@-
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movml d1-d7/a1,a0@-
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movml d1-d7/a1,a0@-
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movml d1-d7/a1,a0@-
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movml d1-d7/a1,a0@-
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dbf d0,Lzloop
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movml sp@+,d2-d7
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rts
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