n_infnan.S revision 1.3 
11.3Ssimonb/*      $NetBSD: n_infnan.S,v 1.3 1999/07/02 15:37:35 simonb Exp $ */
21.1Sragge/*
31.1Sragge * Copyright (c) 1985, 1993
41.1Sragge *	The Regents of the University of California.  All rights reserved.
51.1Sragge *
61.1Sragge * Redistribution and use in source and binary forms, with or without
71.1Sragge * modification, are permitted provided that the following conditions
81.1Sragge * are met:
91.1Sragge * 1. Redistributions of source code must retain the above copyright
101.1Sragge *    notice, this list of conditions and the following disclaimer.
111.1Sragge * 2. Redistributions in binary form must reproduce the above copyright
121.1Sragge *    notice, this list of conditions and the following disclaimer in the
131.1Sragge *    documentation and/or other materials provided with the distribution.
141.1Sragge * 3. All advertising materials mentioning features or use of this software
151.1Sragge *    must display the following acknowledgement:
161.1Sragge *	This product includes software developed by the University of
171.1Sragge *	California, Berkeley and its contributors.
181.1Sragge * 4. Neither the name of the University nor the names of its contributors
191.1Sragge *    may be used to endorse or promote products derived from this software
201.1Sragge *    without specific prior written permission.
211.1Sragge *
221.1Sragge * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
231.1Sragge * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
241.1Sragge * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
251.1Sragge * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
261.1Sragge * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
271.1Sragge * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
281.1Sragge * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
291.1Sragge * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
301.1Sragge * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
311.1Sragge * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
321.1Sragge * SUCH DAMAGE.
331.1Sragge *
341.1Sragge *	@(#)infnan.s	8.1 (Berkeley) 6/4/93
351.1Sragge */
361.1Sragge	.data
371.1Sragge	.align	2
381.1Sragge_sccsid:
391.1Sragge.asciz	"@(#)infnan.s	1.1 (Berkeley) 8/21/85; 8.1 (ucb.elefunt) 6/4/93"
401.1Sragge
411.1Sragge/*
421.1Sragge * infnan(arg) int arg;
431.1Sragge * where arg :=    EDOM	if result is  NaN
441.1Sragge *	     :=  ERANGE	if result is +INF
451.1Sragge *	     := -ERANGE if result is -INF
461.1Sragge *
471.1Sragge * The Reserved Operand Fault is generated inside of this routine.
481.3Ssimonb */
491.1Sragge	.set	EDOM,33
501.1Sragge	.set	ERANGE,34
511.1Sragge	.text
521.1Sragge	.align 1
531.2Smatt	.globl	_infnan
541.2Smatt	.type	_infnan,@function
551.1Sragge_infnan:
561.1Sragge	.word	0x0
571.1Sragge	cmpl	4(ap),$ERANGE
581.1Sragge	bneq	1f
591.1Sragge	movl	$ERANGE,_errno
601.1Sragge	brb	2f
611.1Sragge1:	movl	$EDOM,_errno
621.1Sragge2:	emodd	$0,$0,$0x8000,r0,r0	# generates the reserved operand fault
631.1Sragge	ret
64