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52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This 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
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This 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 this library; if not, write to the Free
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Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02111-1301, 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, size_t 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 char *dst, register const char *src, 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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