232 lines
3.3 KiB
ArmAsm
232 lines
3.3 KiB
ArmAsm
/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <sysdep.h>
|
|
#include <endian.h>
|
|
|
|
/*
|
|
* void *memcpy(void *dst, const void *src, size_t n);
|
|
* No overlap between the memory of DST and of SRC are assumed.
|
|
*/
|
|
|
|
ENTRY(memcpy)
|
|
tst r6,r6
|
|
bt/s 1f
|
|
mov r4,r0
|
|
mov #12,r1
|
|
cmp/gt r6,r1
|
|
bf 2f
|
|
0:
|
|
mov.b @r5+,r1
|
|
dt r6
|
|
mov.b r1,@r4
|
|
bf/s 0b
|
|
add #1,r4
|
|
1:
|
|
rts
|
|
nop
|
|
2:
|
|
mov.l r8,@-r15
|
|
mov.l r9,@-r15
|
|
mov r6,r2
|
|
mov.l r10,@-r15
|
|
mov.l r11,@-r15
|
|
mov.l r14,@-r15
|
|
mov r4,r11
|
|
mov r15,r14
|
|
mov r5,r0
|
|
and #1,r0
|
|
tst r0,r0
|
|
bt/s .L42
|
|
mov r5,r0
|
|
mov.b @r5+,r1
|
|
add #-1,r2
|
|
add #1,r4
|
|
mov.b r1,@r11
|
|
mov r5,r0
|
|
.L42:
|
|
and #2,r0
|
|
tst r0,r0
|
|
bt/s .L43
|
|
mov r4,r0
|
|
mov.b @r5+,r1
|
|
mov.b r1,@r4
|
|
mov.b @r5+,r1
|
|
add #1,r4
|
|
add #-2,r2
|
|
mov.b r1,@r4
|
|
add #1,r4
|
|
mov r4,r0
|
|
.L43:
|
|
and #1,r0
|
|
tst r0,r0
|
|
bf/s .L38
|
|
mov r4,r0
|
|
and #2,r0
|
|
tst r0,r0
|
|
bf/s .L7
|
|
mov r2,r0
|
|
shlr2 r0
|
|
and #3,r0
|
|
cmp/eq #2,r0
|
|
bt/s .L10
|
|
mov #2,r1
|
|
cmp/gt r1,r0
|
|
bt/s .L14
|
|
cmp/eq #3,r0
|
|
cmp/eq #1,r0
|
|
bt/s .L11
|
|
mov r0,r1
|
|
bra .L44
|
|
shll2 r1
|
|
.align 5
|
|
.L14:
|
|
bf .L8
|
|
mov.l @(8,r5),r1
|
|
mov.l r1,@(8,r4)
|
|
.L10:
|
|
mov.l @(4,r5),r1
|
|
mov.l r1,@(4,r4)
|
|
.L11:
|
|
mov.l @r5,r1
|
|
mov.l r1,@r4
|
|
.L8:
|
|
mov r0,r1
|
|
shll2 r1
|
|
.L44:
|
|
add r1,r4
|
|
add r1,r5
|
|
mov r2,r0
|
|
mov #-4,r1
|
|
shad r1,r0
|
|
mov #3,r6
|
|
bra .L37
|
|
and r2,r6
|
|
.align 5
|
|
.L18:
|
|
mov.l @r5+,r1
|
|
mov.l @r5+,r2
|
|
mov.l @r5+,r3
|
|
mov.l @r5+,r7
|
|
mov.l r1,@r4
|
|
mov.l r2,@(4,r4)
|
|
mov.l r3,@(8,r4)
|
|
mov.l r7,@(12,r4)
|
|
add #16,r4
|
|
.L37:
|
|
cmp/pl r0
|
|
bt/s .L18
|
|
add #-1,r0
|
|
mov r6,r2
|
|
.L38:
|
|
bra .L40
|
|
mov r2,r0
|
|
.align 5
|
|
.L7:
|
|
shar r0
|
|
and #3,r0
|
|
cmp/eq #2,r0
|
|
bt/s .L23
|
|
mov #2,r1
|
|
cmp/gt r1,r0
|
|
bt/s .L27
|
|
cmp/eq #3,r0
|
|
cmp/eq #1,r0
|
|
bt/s .L24
|
|
mov r0,r1
|
|
bra .L45
|
|
add r0,r1
|
|
.align 5
|
|
.L27:
|
|
bf .L21
|
|
add #4,r5
|
|
mov.w @r5,r1
|
|
add #4,r4
|
|
mov.w r1,@r4
|
|
add #-4,r5
|
|
add #-4,r4
|
|
.L23:
|
|
add #2,r5
|
|
mov.w @r5,r1
|
|
add #2,r4
|
|
mov.w r1,@r4
|
|
add #-2,r5
|
|
add #-2,r4
|
|
.L24:
|
|
mov.w @r5,r1
|
|
mov.w r1,@r4
|
|
.L21:
|
|
mov r0,r1
|
|
add r0,r1
|
|
.L45:
|
|
add r1,r4
|
|
add r1,r5
|
|
mov r2,r0
|
|
mov #-3,r1
|
|
shad r1,r0
|
|
mov #1,r10
|
|
mov r0,r1
|
|
and r2,r10
|
|
cmp/pl r1
|
|
bf/s .L29
|
|
add #-1,r0
|
|
mov r4,r9
|
|
mov r4,r8
|
|
add #4,r9
|
|
mov r4,r6
|
|
add #6,r8
|
|
add #2,r6
|
|
.L31:
|
|
mov.w @r5+,r1
|
|
mov.w @r5+,r2
|
|
mov.w @r5+,r3
|
|
mov.w @r5+,r7
|
|
mov.w r1,@r4
|
|
mov.w r2,@r6
|
|
add #8,r4
|
|
mov r0,r1
|
|
add #8,r6
|
|
mov.w r3,@r9
|
|
add #-1,r0
|
|
add #8,r9
|
|
mov.w r7,@r8
|
|
cmp/pl r1
|
|
bt/s .L31
|
|
add #8,r8
|
|
.L29:
|
|
mov r10,r2
|
|
mov r2,r0
|
|
.L40:
|
|
cmp/pl r0
|
|
bf .L34
|
|
.L35:
|
|
mov.b @r5+,r1
|
|
dt r2
|
|
mov.b r1,@r4
|
|
bf/s .L35
|
|
add #1,r4
|
|
.L34:
|
|
mov r11,r0
|
|
mov r14,r15
|
|
mov.l @r15+,r14
|
|
mov.l @r15+,r11
|
|
mov.l @r15+,r10
|
|
mov.l @r15+,r9
|
|
rts
|
|
mov.l @r15+,r8
|