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