| 1 | /* Canonicalize floating-point representation. |
|---|
| 2 | Copyright (C) 2016-2022 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 | |
|---|
| 21 | int |
|---|
| 22 | M_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 | |
|---|
| 37 | declare_mgen_alias (__canonicalize, canonicalize) |
|---|
| 38 | |
|---|
