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99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/* Copyright (C) 2002 MySQL 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., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA */
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/* File : bfill.c
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Author : Richard A. O'Keefe.
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Michael Widenius; ifdef MC68000
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Updated: 23 April 1984
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Defines: bfill()
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bfill(dst, len, fill) moves "len" fill characters to "dst".
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Thus to set a buffer to 80 spaces, do bfill(buff, 80, ' ').
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Note: the "b" routines are there to exploit certain VAX order codes,
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but the MOVC5 instruction will only move 65535 characters. The asm
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code is presented for your interest and amusement.
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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(bfill) && !defined(HAVE_BFILL)
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#if VaxAsm
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void bfill(dst, len, fill)
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char *dst;
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uint len;
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int fill; /* actually char */
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{
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asm("movc5 $0,*4(ap),12(ap),8(ap),*4(ap)");
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}
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#elif defined(MC68000) && defined(DS90)
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void bfill(dst, len,fill) /* Optimized with long-fill */
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char *dst;
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uint len;
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pchar fill;
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{
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asm(" movl 8.(a7),d1 ");
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asm(" jeq .L9 ");
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asm(" movl 4.(a7),a0 ");
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asm(" moveq #0,d0 ");
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asm(" movb 15.(a7),d0 ");
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asm(" movl d2,a1 ");
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asm(" movw d0,d2 ");
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asm(" aslw #8,d0 ");
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asm(" orw d2,d0 ");
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asm(" movl d0,d2 ");
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asm(" swap d0 ");
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asm(" orl d2,d0 ");
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asm(" movl a0,d2 ");
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asm(" btst #0,d2 ");
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asm(" jeq .L1 ");
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asm(" movb d0,(a0)+ ");
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asm(" subql #1,d1 ");
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asm(".L1: movl d1,d2 ");
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asm(" lsrl #2,d2 ");
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asm(" jcc .L2 ");
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asm(" movw d0,(a0)+ ");
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asm(" jra .L2 ");
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asm(".L3: movl d0,(a0)+ ");
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asm(".L2: dbra d2,.L3 ");
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asm(" addqw #1,d2 ");
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asm(" subql #1,d2 ");
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asm(" jcc .L3 ");
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asm(" andl #1,d1 ");
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asm(" jeq .L8 ");
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asm(" movb d0,(a0) ");
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asm(".L8: movl a1,d2 ");
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asm(".L9: rts ");
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}
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#else
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void bfill(dst, len, fill)
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register byte *dst;
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register uint len;
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register pchar fill;
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{
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while (len-- != 0) *dst++ = fill;
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}
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#endif
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#endif
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