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/* $NetBSD: memcpy.S,v 1.1 1996/01/31 23:18:17 mark Exp $ */
/*
* Copyright (c) 1995 Mark Brinicombe.
* Copyright (c) 1995 Brini.
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Brini.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BRINI ``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 BRINI 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.
*
* RiscBSD kernel project
*
* memset.S
*
* optimized memset function
*
* Created : 16/05/95
* Last updated : 16/05/95
*
* $Id: memcpy.S,v 1.1 1996/04/24 11:08:32 deraadt Exp $
*/
sp .req r13
lr .req r14
pc .req r15
.text
.global _bcopy
.global _ovbcopy
_bcopy:
_ovbcopy:
teq r2, #0x00000000
moveq r0, #0x00000000
moveq pc, lr
cmp r0, r1
blt bcopy_back
bcopy_loop:
ldrb r3, [r0], #0x0001
strb r3, [r1], #0x0001
subs r2, r2, #0x00000001
bne bcopy_loop
mov pc, r14
bcopy_back:
add r0, r0, r2
add r1, r1, r2
bcopy_bloop:
ldrb r3, [r0, #-0x0001]!
strb r3, [r1, #-0x0001]!
subs r2, r2, #0x00000001
bne bcopy_bloop
mov pc, r14
.global _memcpy
_memcpy:
teq r2, #0x00000000
moveq r0, #0x00000000
moveq pc, lr
cmp r1, r0
blt memcpy_back
memcpy_loop:
ldrb r3, [r1], #0x0001
strb r3, [r0], #0x0001
subs r2, r2, #0x00000001
bne memcpy_loop
mov pc, r14
memcpy_back:
add r0, r0, r2
add r1, r1, r2
memcpy_bloop:
ldrb r3, [r1, #-0x0001]!
strb r3, [r0, #-0x0001]!
subs r2, r2, #0x00000001
bne memcpy_bloop
mov pc, r14
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