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/* $OpenBSD: muldi3.s,v 1.1 1997/01/16 09:26:39 niklas Exp $
/* $NetBSD: muldi3.s,v 1.1.1.1 1996/11/29 23:36:30 is Exp $
*
* Copyright (c) 1996 Ignatios Souvatzis
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ignatios Souvatzis
* for the NetBSD project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Slow but small muldi3.
* Beware... the multiplicand is unsigned (but should be enough for
* usage by ufs.c :-)
*/
.text
.even
.globl ___muldi3
___muldi3:
movml d2/d3/d4/d5/d6,sp@- | 0..4 regs, 5 pc, 6..9 parameters
movml sp@(24),d2-d5
| movl sp@(24),d2
| movl sp@(28),d3
| movl sp@(32),d4
| movl sp@(36),d5
movq #0,d0
movq #0,d1
movq #63,d6
L4:
asrl #1,d2
roxrl #1,d3
jcc L5
addl d5,d1
addxl d4,d0
L5:
addl d5,d5
addxl d4,d4
L7:
dbra d6,L4
movml sp@+,d2/d3/d4/d5/d6
rts
|
