| 1 | /* Test for finite value (zero, subnormal, or normal, and not infinite or NaN). |
| 2 | Copyright (C) 2007-2014 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 | } |