NetBSD/lib/libm/tahoe/infnan.S

62 lines
2.4 KiB
ArmAsm

# Copyright (c) 1985 Regents of the University of California.
# All rights reserved.
#
# 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
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# 2. Redistributions in binary form must reproduce the above copyright
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# 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
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# SUCH DAMAGE.
#
.data
.align 2
;_sccsid:
;.asciz "from: @(#)infnan.s 5.5 (ucb.elefunt) 10/9/90"
_rcsid:
.asciz "$Id: infnan.S,v 1.1 1993/08/14 13:43:59 mycroft Exp $"
/*
* double infnan(arg)
* int arg;
* where arg := EDOM if result is NaN
* := ERANGE if result is +INF
* := -ERANGE if result is -INF
*
* The Reserved Operand Fault is generated inside of this routine.
*/
.globl _infnan
.set EDOM,33
.set ERANGE,34
.text
.align 2
_infnan:
.word 0x0000 # save nothing
cmpl 4(fp),$ERANGE
bneq 1f
movl $ERANGE,_errno
brb 2f
1: movl $EDOM,_errno
2: cmpf2 $0x80000000,$0x80000000 # generates the reserved operand fault
ret