1/* Canonicalize floating-point representation.
2 Copyright (C) 2016-2020 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 <math.h>
20
21int
22M_DECL_FUNC (__canonicalize) (FLOAT *cx, const FLOAT *x)
23{
24 FLOAT val = *x;
25 /* For all binary formats supported by glibc, iscanonical only fails
26 if the representation is not a valid representation of the type,
27 so the only work to do is for signaling NaNs. */
28 if (!iscanonical (val))
29 return 1;
30 if (issignaling (val))
31 *cx = val + val;
32 else
33 *cx = val;
34 return 0;
35}
36
37declare_mgen_alias (__canonicalize, canonicalize)
38