n_infnan.S revision 1.1 
1/*      $NetBSD: n_infnan.S,v 1.1 1995/10/10 23:40:27 ragge Exp $ */
2/*
3 * Copyright (c) 1985, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by the University of
17 *	California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	@(#)infnan.s	8.1 (Berkeley) 6/4/93
35 */
36	.data
37	.align	2
38_sccsid:
39.asciz	"@(#)infnan.s	1.1 (Berkeley) 8/21/85; 8.1 (ucb.elefunt) 6/4/93"
40
41/*
42 * infnan(arg) int arg;
43 * where arg :=    EDOM	if result is  NaN
44 *	     :=  ERANGE	if result is +INF
45 *	     := -ERANGE if result is -INF
46 *
47 * The Reserved Operand Fault is generated inside of this routine.
48 */
49	.globl	_infnan
50	.set	EDOM,33
51	.set	ERANGE,34
52	.text
53	.align 1
54_infnan:
55	.word	0x0
56	cmpl	4(ap),$ERANGE
57	bneq	1f
58	movl	$ERANGE,_errno
59	brb	2f
601:	movl	$EDOM,_errno
612:	emodd	$0,$0,$0x8000,r0,r0	# generates the reserved operand fault
62	ret
63