93 lines
2.9 KiB
ArmAsm
93 lines
2.9 KiB
ArmAsm
/* $NetBSD: sdivsi3.S,v 1.2 2000/01/03 02:40:04 msaitoh Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* 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 the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*
|
|
* from: @(#)udivsi3.s 5.1 (Berkeley) 5/15/90
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
#if defined(LIBC_SCCS)
|
|
RCSID("$NetBSD: sdivsi3.S,v 1.2 2000/01/03 02:40:04 msaitoh Exp $")
|
|
#endif
|
|
|
|
/* r0 <= r4 / r5 */
|
|
ENTRY(__sdivsi3)
|
|
mov r4, r0
|
|
mov r5, r1
|
|
|
|
tst r1, r1
|
|
bt div_by_zero
|
|
|
|
mov #0, r2
|
|
div0s r2, r0
|
|
subc r3, r3
|
|
subc r2, r0
|
|
div0s r1, r3
|
|
#define DIVSTEP rotcl r0; div1 r1, r3
|
|
/* repeat 32 times */
|
|
DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP;
|
|
DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP;
|
|
DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP;
|
|
DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP;
|
|
#undef DIVSTEP
|
|
rotcl r0
|
|
|
|
rts
|
|
addc r2, r0 /* delay slot */
|
|
|
|
div_by_zero:
|
|
#ifdef _KERNEL
|
|
rts
|
|
mov #0, r0 /* delay slot */
|
|
#else
|
|
mov.l r14, @-r15
|
|
sts.l pr, @-r15
|
|
mov r15, r14
|
|
|
|
mov.l L_raise, r1
|
|
jsr @r1
|
|
mov #8, r4 /* delay slot */
|
|
mov #0, r0
|
|
|
|
lds.l @r15+, pr
|
|
rts
|
|
mov.l @r15+, r14 /* delay slot */
|
|
|
|
.align 2
|
|
L_raise:
|
|
.long _raise
|
|
#endif
|