51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
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/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* File : bmove.c
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Author : Michael widenius
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Updated: 1987-03-20
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Defines: bmove_upp()
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bmove_upp(dst, src, len) moves exactly "len" bytes from the source
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"src-len" to the destination "dst-len" counting downwards.
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*/
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#include <my_global.h>
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#include "m_string.h"
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#if defined(MC68000) && defined(DS90)
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/* 0 <= len <= 65535 */
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void bmove_upp(byte *dst, const byte *src,uint len)
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{
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asm(" movl 12(a7),d0 ");
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asm(" subql #1,d0 ");
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asm(" blt .L5 ");
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asm(" movl 4(a7),a1 ");
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asm(" movl 8(a7),a0 ");
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asm(".L4: movb -(a0),-(a1) ");
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asm(" dbf d0,.L4 ");
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asm(".L5: ");
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}
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#else
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void bmove_upp(register uchar *dst, register const uchar *src,
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register size_t len)
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{
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while (len-- != 0) *--dst = *--src;
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}
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#endif
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