mirror of
https://github.com/adtools/clib2.git
synced 2025-12-08 14:59:05 +00:00
7f0f7929ba
- Replaced ISO Latin 1 code #160 with a plain blank space (ASCII code #32) where necessary git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15305 87f5fb63-7c3d-0410-a384-fd976d0f7a62
618 lines
13 KiB
C
618 lines
13 KiB
C
/*
|
|
* $Id: string_memmove.c,v 1.7 2006-09-22 09:02:51 obarthel Exp $
|
|
*
|
|
* :ts=4
|
|
*
|
|
* Portable ISO 'C' (1994) runtime library for the Amiga computer
|
|
* Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* - Neither the name of Olaf Barthel nor the names of contributors
|
|
* may be used to endorse or promote products derived from this
|
|
* software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
|
|
*/
|
|
|
|
#ifndef _STDLIB_NULL_POINTER_CHECK_H
|
|
#include "stdlib_null_pointer_check.h"
|
|
#endif /* _STDLIB_NULL_POINTER_CHECK_H */
|
|
|
|
/****************************************************************************/
|
|
|
|
#ifndef _STRING_HEADERS_H
|
|
#include "string_headers.h"
|
|
#endif /* _STRING_HEADERS_H */
|
|
|
|
/****************************************************************************/
|
|
|
|
#if (defined(__GNUC__) && defined(__mc68020__) && defined(NDEBUG) && defined(undefined))
|
|
|
|
/****************************************************************************/
|
|
|
|
asm("
|
|
.text
|
|
.even
|
|
|
|
.globl ___ovbcopy
|
|
|
|
___ovbcopy:
|
|
|
|
moveml sp@(4),a0-a1
|
|
movel sp@(12),d0
|
|
|
|
movel a2,sp@-
|
|
cmpal a0,a1
|
|
bcs forwards
|
|
|
|
| If A0 is less than A1 then we _may_ have to do the memory move
|
|
| backwards. However, since doing the memory move backwards is less
|
|
| efficient if we have to do any byte moves, I'll first check to see
|
|
| whether there is actually any overlap.
|
|
|
|
lea a0@(0,d0:l),a2
|
|
cmpal a2,a1 | If A2 is greater than A1 then there is overlap,
|
|
bcs backwards | and we'd better do the move backwards.
|
|
|
|
forwards:
|
|
|
|
movew a0,d1 | Make sure that A0 is long word aligned.
|
|
notw d1 | This may de-align A1, but that's life.
|
|
andiw #3,d1
|
|
|
|
align_loop1:
|
|
|
|
moveb a0@+,a1@+ | Move from one to four bytes to long
|
|
subql #1,d0 | word align A0.
|
|
dbeq d1,align_loop1
|
|
beq done
|
|
|
|
movew d0,d1
|
|
andiw #511,d1
|
|
movew d1,sp@-
|
|
moveq #9,d1
|
|
lsrl d1,d0
|
|
beq no_big_chunks_to_move1
|
|
|
|
moveml d2-d7/a3-a6,sp@-
|
|
swap d0
|
|
movew d0,sp@-
|
|
swap d0
|
|
|
|
bras move_big_chunk_end1
|
|
|
|
move_big_chunk1:
|
|
|
|
moveml a0@+,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@
|
|
moveml a0@+,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@(48)
|
|
moveml a0@+,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@(96)
|
|
moveml a0@+,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@(144)
|
|
moveml a0@+,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@(192)
|
|
moveml a0@+,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@(240)
|
|
moveml a0@+,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@(288)
|
|
moveml a0@+,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@(336)
|
|
moveml a0@+,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@(384)
|
|
moveml a0@+,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@(432)
|
|
moveml a0@+,d1-d7/a2
|
|
moveml d1-d7/a2,a1@(480)
|
|
addaw #512,a1
|
|
|
|
move_big_chunk_end1:
|
|
|
|
dbf d0,move_big_chunk1
|
|
|
|
subqw #1,sp@
|
|
bge move_big_chunk1
|
|
|
|
addqw #2,sp
|
|
|
|
moveml sp@+,d2-d7/a3-a6
|
|
|
|
no_big_chunks_to_move1:
|
|
|
|
movew sp@+,d0
|
|
|
|
movew d0,d1
|
|
lsrw #5,d1 | D1 now holds numbytes / 32 and
|
|
andiw #31,d0 | D0 holds numbytes % 32.
|
|
|
|
bras move_eight_longs_end1
|
|
|
|
move_eight_longs1:
|
|
|
|
movel a0@+,a1@+
|
|
movel a0@+,a1@+
|
|
movel a0@+,a1@+
|
|
movel a0@+,a1@+
|
|
movel a0@+,a1@+
|
|
movel a0@+,a1@+
|
|
movel a0@+,a1@+
|
|
movel a0@+,a1@+
|
|
|
|
move_eight_longs_end1:
|
|
|
|
dbf d1,move_eight_longs1
|
|
|
|
movew d0,d1
|
|
lsrw #2,d1 | D1 now holds numbytes / 4
|
|
|
|
bras move_long_end1
|
|
|
|
move_long1:
|
|
|
|
movel a0@+,a1@+
|
|
|
|
move_long_end1:
|
|
|
|
dbf d1,move_long1
|
|
|
|
andiw #3,d0 | D0 now holds numbytes % 4.
|
|
|
|
bra move_byte_end1
|
|
|
|
move_byte1:
|
|
|
|
moveb a0@+,a1@+
|
|
|
|
move_byte_end1:
|
|
|
|
dbf d0,move_byte1
|
|
|
|
done:
|
|
|
|
movel sp@+,a2
|
|
rts
|
|
|
|
backwards:
|
|
|
|
addal d0,a0
|
|
addal d0,a1
|
|
|
|
movew a0,d1 | Make sure that A0 is long word aligned.
|
|
subqw #1,d1 | This may de-align A1, but that's life.
|
|
andiw #3,d1
|
|
|
|
align_loop2:
|
|
|
|
moveb a0@-,a1@-
|
|
subql #1,d0
|
|
dbeq d1,align_loop2
|
|
beq done
|
|
|
|
movew d0,d1
|
|
andiw #511,d1
|
|
movew d1,sp@-
|
|
moveq #9,d1
|
|
lsrl d1,d0
|
|
beq no_big_chunks_to_move2
|
|
|
|
moveml d2-d7/a3-a6,sp@-
|
|
swap d0
|
|
movew d0,sp@-
|
|
swap d0
|
|
|
|
subaw #48,a0
|
|
bras move_big_chunk_end2
|
|
|
|
move_big_chunk2:
|
|
|
|
moveml a0@,d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@-
|
|
moveml a0@(-48),d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@-
|
|
moveml a0@(-96),d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@-
|
|
moveml a0@(-144),d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@-
|
|
moveml a0@(-192),d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@-
|
|
moveml a0@(-240),d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@-
|
|
moveml a0@(-288),d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@-
|
|
moveml a0@(-336),d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@-
|
|
moveml a0@(-384),d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@-
|
|
moveml a0@(-432),d1-d7/a2-a6
|
|
moveml d1-d7/a2-a6,a1@-
|
|
moveml a0@(-464),d1-d7/a2
|
|
moveml d1-d7/a2,a1@-
|
|
subaw #512,a0
|
|
|
|
move_big_chunk_end2:
|
|
|
|
dbf d0,move_big_chunk2
|
|
|
|
subqw #1,sp@
|
|
bge move_big_chunk2
|
|
|
|
addaw #48,a0
|
|
|
|
addqw #2,sp
|
|
|
|
moveml sp@+,d2-d7/a3-a6
|
|
|
|
no_big_chunks_to_move2:
|
|
|
|
movew sp@+,d0
|
|
|
|
movew d0,d1
|
|
lsrw #5,d1 | D1 now holds numbytes / 32 and
|
|
andiw #31,d0 | D0 holds numbytes % 32.
|
|
|
|
bras move_eight_longs_end2
|
|
|
|
move_eight_longs2:
|
|
|
|
movel a0@-,a1@-
|
|
movel a0@-,a1@-
|
|
movel a0@-,a1@-
|
|
movel a0@-,a1@-
|
|
movel a0@-,a1@-
|
|
movel a0@-,a1@-
|
|
movel a0@-,a1@-
|
|
movel a0@-,a1@-
|
|
|
|
move_eight_longs_end2:
|
|
|
|
dbf d1,move_eight_longs2
|
|
|
|
movew d0,d1
|
|
lsrw #2,d1 | D1 now holds numbytes / 4
|
|
|
|
bra move_long_end2
|
|
|
|
move_long2:
|
|
|
|
movel a0@-,a1@-
|
|
|
|
move_long_end2:
|
|
|
|
dbf d1,move_long2
|
|
|
|
andiw #3,d0 | D0 now holds numbytes % 4.
|
|
bra move_byte_end2
|
|
|