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Diffstat (limited to 'strings/bmove_upp.c')
| -rw-r--r-- | strings/bmove_upp.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/strings/bmove_upp.c b/strings/bmove_upp.c new file mode 100644 index 00000000000..af6575ebf41 --- /dev/null +++ b/strings/bmove_upp.c @@ -0,0 +1,51 @@ +/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, + MA 02111-1307, USA */ + +/* File : bmove.c + Author : Michael widenius + Updated: 1987-03-20 + Defines: bmove_upp() + + bmove_upp(dst, src, len) moves exactly "len" bytes from the source + "src-len" to the destination "dst-len" counting downwards. +*/ + +#include <global.h> +#include "m_string.h" + +#if defined(MC68000) && defined(DS90) + +/* 0 <= len <= 65535 */ +void bmove_upp(byte *dst, const byte *src,uint len) +{ +asm(" movl 12(a7),d0 "); +asm(" subql #1,d0 "); +asm(" blt .L5 "); +asm(" movl 4(a7),a1 "); +asm(" movl 8(a7),a0 "); +asm(".L4: movb -(a0),-(a1) "); +asm(" dbf d0,.L4 "); +asm(".L5: "); +} +#else + +void bmove_upp(register char *dst, register const char *src, register uint len) +{ + while (len-- != 0) *--dst = *--src; +} + +#endif |