~drizzle-trunk/drizzle/development

/* Copyright (C) 2002 MySQL 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; version 2

   of the License.

   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   : bfill.c

    Author : Richard A. O'Keefe.

	     Michael Widenius;	ifdef MC68000

    Updated: 23 April 1984

    Defines: bfill()

    bfill(dst, len, fill) moves "len" fill characters to "dst".

    Thus to set a buffer to 80 spaces, do bfill(buff, 80, ' ').

    Note: the "b" routines are there to exploit certain VAX order codes,

    but the MOVC5 instruction will only move 65535 characters.	 The asm

    code is presented for your interest and amusement.

*/

#include <my_global.h>

#include "m_string.h"

#if !defined(bfill) && !defined(HAVE_BFILL)

#if VaxAsm

void bfill(dst, len, fill)

char *dst;

uint len;

int fill; /* actually char */

{

  asm("movc5 $0,*4(ap),12(ap),8(ap),*4(ap)");

}

#elif defined(MC68000) && defined(DS90)

void bfill(dst, len,fill)			/* Optimized with long-fill */

char *dst;

uint len;

pchar fill;

{

asm("		movl	8.(a7),d1	");

asm("		jeq	.L9		");

asm("		movl	4.(a7),a0	");

asm("		moveq	#0,d0		");

asm("		movb	15.(a7),d0	");

asm("		movl	d2,a1		");

asm("		movw	d0,d2		");

asm("		aslw	#8,d0		");

asm("		orw	d2,d0		");

asm("		movl	d0,d2		");

asm("		swap	d0		");

asm("		orl	d2,d0		");

asm("		movl	a0,d2		");

asm("		btst	#0,d2		");

asm("		jeq	.L1		");

asm("		movb	d0,(a0)+	");

asm("		subql	#1,d1		");

asm(".L1:	movl	d1,d2		");

asm("		lsrl	#2,d2		");

asm("		jcc	.L2		");

asm("		movw	d0,(a0)+	");

asm("		jra	.L2		");

asm(".L3:	movl	d0,(a0)+	");

asm(".L2:	dbra	d2,.L3		");

asm("		addqw	#1,d2		");

asm("		subql	#1,d2		");

asm("		jcc	.L3		");

asm("		andl	#1,d1		");

asm("		jeq	.L8		");

asm("		movb	d0,(a0)		");

asm(".L8:	movl	a1,d2		");

asm(".L9:	rts			");

}

#else

void bfill(dst, len, fill)

register byte *dst;

register uint len;

register pchar fill;

{

  while (len-- != 0) *dst++ = fill;

}

#endif

#endif