1/* Return the least floating-point number greater than X.
2 Copyright (C) 2016-2021 Free Software Foundation, Inc.
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 <https://www.gnu.org/licenses/>. */
18
19#include <float.h>
20#include <math.h>
21#include <math_private.h>
22#include <libm-alias-float.h>
23
24/* Return the least floating-point number greater than X. */
25float
26__nextupf (float x)
27{
28 int32_t hx, ix;
29
30 GET_FLOAT_WORD (hx, x);
31 ix = hx & 0x7fffffff;
32 if (ix == 0)
33 return FLT_TRUE_MIN;
34 if (ix > 0x7f800000) /* x is nan. */
35 return x + x;
36 if (hx >= 0)
37 { /* x > 0. */
38 if (isinf (x))
39 return x;
40 hx += 1;
41 }
42 else
43 hx -= 1;
44 SET_FLOAT_WORD (x, hx);
45 return x;
46}
47
48libm_alias_float (__nextup, nextup)
49