Return to infnan.s CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / usr.lib / libm / tahoe

BSD 4.3tahoe

# Copyright (c) 1985 Regents of the University of California.
# All rights reserved.
#
# Redistribution and use in source and binary forms are permitted
# provided that the above copyright notice and this paragraph are
# duplicated in all such forms and that any documentation,
# advertising materials, and other materials related to such
# distribution and use acknowledge that the software was developed
# by the University of California, Berkeley.  The name of the
# University may not be used to endorse or promote products derived
# from this software without specific prior written permission.
# THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
# WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
# All recipients should regard themselves as participants in an ongoing
# research project and hence should feel obligated to report their
# experiences (good or bad) with these elementary function codes, using
# the sendbug(8) program, to the authors.
#
#	@(#)infnan.s	5.4 (Berkeley) 6/30/88
#
	.data
	.align	2
_sccsid:
.asciz	"@(#)infnan.s	5.4	(ucb.elefunt)	6/30/88"

/*
 * double infnan(arg)
 * int arg;
 * where arg :=    EDOM	if result is  NaN
 *	     :=  ERANGE	if result is +INF
 *	     := -ERANGE if result is -INF
 *
 * The Reserved Operand Fault is generated inside of this routine.
 */	
	.globl	_infnan
	.set	EDOM,33
	.set	ERANGE,34
	.text
	.align 2
_infnan:
	.word	0x0000			# save nothing
	cmpl	4(fp),$ERANGE
	bneq	1f
	movl	$ERANGE,_errno
	brb	2f
1:	movl	$EDOM,_errno
2:	cmpf2	$0x80000000,$0x80000000	# generates the reserved operand fault
	ret

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.