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52414043 MW |
1 | /* Test for finite value (zero, subnormal, or normal, and not infinite or NaN). |
2 | Copyright (C) 2007-2013 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 <http://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 | ||
38 | int gl_isfinitef (float x) | |
39 | { | |
40 | return !isnanf (x) && x - x == zerof; | |
41 | } | |
42 | ||
43 | int gl_isfinited (double x) | |
44 | { | |
45 | return !isnand (x) && x - x == zerod; | |
46 | } | |
47 | ||
48 | int gl_isfinitel (long double x) | |
49 | { | |
50 | return !isnanl (x) && x - x == zerol; | |
51 | } |