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