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41a359e2 | 1 | /* Return the least floating-point number greater than X. |
688903eb | 2 | Copyright (C) 2016-2018 Free Software Foundation, Inc. |
41a359e2 RS |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
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 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <math.h> | |
20 | #include <math_private.h> | |
2f49ce7d | 21 | #include <libm-alias-float.h> |
41a359e2 RS |
22 | |
23 | /* Return the least floating-point number greater than X. */ | |
24 | float | |
25 | __nextupf (float x) | |
26 | { | |
27 | int32_t hx, ix; | |
28 | ||
29 | GET_FLOAT_WORD (hx, x); | |
30 | ix = hx & 0x7fffffff; | |
31 | if (ix == 0) | |
32 | return FLT_TRUE_MIN; | |
33 | if (ix > 0x7f800000) /* x is nan. */ | |
34 | return x + x; | |
35 | if (hx >= 0) | |
36 | { /* x > 0. */ | |
37 | if (isinf (x)) | |
38 | return x; | |
39 | hx += 1; | |
40 | } | |
41 | else | |
42 | hx -= 1; | |
43 | SET_FLOAT_WORD (x, hx); | |
44 | return x; | |
45 | } | |
46 | ||
2f49ce7d | 47 | libm_alias_float (__nextup, nextup) |