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109 lines
3 KiB
C
109 lines
3 KiB
C
/* Copyright Richard A. O'Keefe.
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Copyright (c) 2000 TXT DataKonsult Ab & Monty Program Ab
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Copyright (c) 2009-2011, Monty Program Ab
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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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 "strings_def.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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