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8439150e8a
2002-07-05 Kaz Kojima <kkojima@rr.iij4u.or.jp> * sysdeps/sh/memcpy.S: Optimize. Based on a patch by Toshiyasu Morita <toshiyasu.morita@hsa.hitachi.com>. * sysdeps/sh/memcpy.S: Likewise.
88 lines
1.7 KiB
ArmAsm
88 lines
1.7 KiB
ArmAsm
/* Copyright (C) 1999, 2000, 2002 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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Optimized by Toshiyasu Morita <toshiyasu.morita@hsa.hitachi.com>
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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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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mov #12,r0
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cmp/gt r6,r0
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bt.s L_byte_loop_init
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mov r4,r7
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swap.b r5,r1
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or r1,r5
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swap.w r5,r1
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or r1,r5
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mov r4,r0
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tst #1,r0
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bt L_wordalign
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mov.b r5,@r4
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add #-1,r6
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add #1,r4
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mov r4,r0
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.balignw 4,0x0009
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L_wordalign:
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tst #2,r0
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bt L_word_loop_init
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mov.w r5,@r4
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add #-2,r6
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add #2,r4
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mov r4,r0
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.balignw 4,0x0009
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L_word_loop_init:
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mov r6,r3
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shlr2 r3
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mov #7,r0
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shlr r3
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and r0,r6
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.balignw 4,0x0009
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L_2word_loop:
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mov.l r5,@r4
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dt r3
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mov.l r5,@(4,r4)
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bf.s L_2word_loop
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add #8,r4
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.balignw 4,0x0009
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L_byte_loop_init:
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tst r6,r6
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bt L_byte_exit
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.balignw 4,0x0009
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L_byte_loop:
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mov.b r5,@r4
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dt r6
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bf.s L_byte_loop
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add #1,r4
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.balignw 4,0x0009
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L_byte_exit:
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rts
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mov r7,r0
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END(memset)
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