1 /* $NetBSD: divsi3.S,v 1.2 2006/01/05 22:33:34 he Exp $ */
4 * Copyright (c) 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
8 * the Systems Programming Group of the University of Utah Computer
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12 * modification, are permitted provided that the following conditions
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15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
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19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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36 #include <machine/asm.h>
38 #if defined(LIBC_SCCS) && !defined(lint)
40 RCSID("from: @(#)divsi3.s 5.1 (Berkeley) 6/7/90")
42 RCSID("$NetBSD: divsi3.S,v 1.2 2006/01/05 22:33:34 he Exp $")
44 #endif /* LIBC_SCCS and not lint */
53 | NB: this requires that __udivsi3 preserve %a0:
54 movel %sp@(4), %d1 | load the dividend
56 negl %sp@(4) | store abs(dividend)
57 1: movel %sp@(8), %d0 | load the divisor
59 negl %sp@(8) | store abs(divisor)
61 bpl 3f | branch if sgn(divisor) == sgn(dividend)
62 movel %sp@+, %a0 | pop return address
63 pea %pc@(Lret) | push our return address
64 3: jmp _C_LABEL(__udivsi3)
65 Lret: negl %d0 | negate quotient
67 #endif /* __mc68010__ */