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/* 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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
|
