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80 lines
1.6 KiB
ArmAsm
80 lines
1.6 KiB
ArmAsm
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/* 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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Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
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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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/* void *memset (t, c, len) */
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ENTRY(memset)
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tst r6, r6
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bt/s end
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mov r4, r3
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mov #3, r0
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cmp/hs r6, r0
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bt/s 2f
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and r4, r0
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tst r0, r0
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bt/s 1f
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add r0, r6
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add #-1, r0
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shll2 r0
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braf r0
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add #-4, r6
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mov.b r5, @r4
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add #1, r4
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mov.b r5, @r4
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add #1, r4
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mov.b r5, @r4
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add #1, r4
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1:
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extu.b r5, r0
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shll8 r5
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or r5, r0
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extu.w r0, r0
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mov r0, r5
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swap.w r5, r5
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or r0, r5
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2:
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add #-4, r6
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cmp/pz r6
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bf afew
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mov.l r5, @r4
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bra 2b
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add #4, r4
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afew:
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mov #-1, r0
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sub r6, r0
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shll2 r0
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braf r0
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nop
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mov.b r5, @r4
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add #1, r4
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mov.b r5, @r4
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add #1, r4
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mov.b r5, @r4
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add #1, r4
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end:
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rts
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mov r3, r0
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END(memset)
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