/* $NetBSD: divsi3.S,v 1.4 2020/04/23 03:12:49 rin Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*/
#include <machine/asm.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
RCSID("from: @(#)divsi3.s 5.1 (Berkeley) 6/7/90")
#else
RCSID("$NetBSD: divsi3.S,v 1.4 2020/04/23 03:12:49 rin Exp $")
#endif
#endif /* LIBC_SCCS and not lint */
/* int / int */
#ifndef __mc68010__
/* XXX sun3 need this for bootloader */
ENTRY(__divsi3)
movel 4(%sp),%d0
divsl 8(%sp),%d0
rts
END(__divsi3)
#else
ENTRY(__divsi3)
| NB: this requires that __udivsi3 preserve %a0:
movel 4(%sp), %d1 | load the dividend
bpl 1f
negl 4(%sp) | store abs(dividend)
1: movel 8(%sp), %d0 | load the divisor
bpl 2f
negl 8(%sp) | store abs(divisor)
2: eorl %d1, %d0
bpl 3f | branch if sgn(divisor) == sgn(dividend)
movel (%sp)+, %a0 | pop return address
pea (.Lret,%pc) | push our return address
3: jmp _C_LABEL(__udivsi3)
Lret: negl %d0 | negate quotient
jmp (%a0)
END(__divsi3)
#endif /* __mc68010__ */
