1/* Return the least floating-point number greater than X.
2 Copyright (C) 2016-2018 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#include <libm-alias-float.h>
22
23/* Return the least floating-point number greater than X. */
24float
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
47libm_alias_float (__nextup, nextup)
48