1 /* Test for finite value (zero, subnormal, or normal, and not infinite or NaN).
2 Copyright (C) 2007-2021 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
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 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public License along
15 with this program; if not, see <https://www.gnu.org/licenses/>. */
16
17 /* Written by Ben Pfaff <blp@gnu.org>, 2007. */
18
19 #include <config.h>
20
21 #include "isnanf-nolibm.h"
22 #include "isnand-nolibm.h"
23 #include "isnanl-nolibm.h"
24
25 /* The "cc" compiler on HP-UX 11.11, when optimizing, simplifies the test
26 x - y == 0.0 to x == y, a simplification which is invalid when x and y
27 are Infinity. Disable this optimization. */
28 #if defined __hpux && !defined __GNUC__
29 static float zerof;
30 static double zerod;
31 static long double zerol;
32 #else
33 # define zerof 0.f
34 # define zerod 0.
35 # define zerol 0.L
36 #endif
37
gl_isfinitef(float x)38 int gl_isfinitef (float x)
39 {
40 return !isnanf (x) && x - x == zerof;
41 }
42
gl_isfinited(double x)43 int gl_isfinited (double x)
44 {
45 return !isnand (x) && x - x == zerod;
46 }
47
gl_isfinitel(long double x)48 int gl_isfinitel (long double x)
49 {
50 return !isnanl (x) && x - x == zerol;
51 }
52