1 /* Test for finite value (zero, subnormal, or normal, and not infinite or NaN).
2 Copyright (C) 2007-2011 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Written by Ben Pfaff <blp@gnu.org>, 2007. */
22 #include "isnanf-nolibm.h"
23 #include "isnand-nolibm.h"
24 #include "isnanl-nolibm.h"
26 /* The "cc" compiler on HP-UX 11.11, when optimizing, simplifies the test
27 x - y == 0.0 to x == y, a simplification which is invalid when x and y
28 are Infinity. Disable this optimization. */
29 #if defined __hpux && !defined __GNUC__
32 static long double zerol;
39 int gl_isfinitef (float x)
41 return !isnanf (x) && x - x == zerof;
44 int gl_isfinited (double x)
46 return !isnand (x) && x - x == zerod;
49 int gl_isfinitel (long double x)
51 return !isnanl (x) && x - x == zerol;