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