1 /* 128-bit floating point unordered not-equality.
2 Copyright (C) 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <fenv_libc.h>
22 /* int _q_fne(const long double *a, const long double *b);
28 If either argument is a SNaN, we set FPSCR_VXSNAN to cause an
29 'invalid operation' exception.
33 __q_fne(const unsigned a
[4], const unsigned b
[4])
39 if ((a0
>> 16 & 0x7fff) != 0x7fff &&
40 (b0
>> 16 & 0x7fff) != 0x7fff)
42 unsigned a3
,b3
,a2
,b2
,a1
,b1
;
45 a3
= a
[3]; b3
= b
[3]; a2
= a
[2];
57 z
= (z
>> 1 | z
| a0
) & 0x7fffffff;
58 /* 'z' is 0 iff a==0.0, otherwise between 1 and 0x7fffffff */
59 return (a0
^b0
) & ~(-z
& 0x80000000);
64 if (((a0
|b0
) & 0x8000) == 0)
66 set_fpscr_bit(FPSCR_VXSNAN
);