1 | /* Test whether X == Y. |
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 <errno.h> |
20 | #include <fenv.h> |
21 | #include <math.h> |
22 | #include <stdbool.h> |
23 | #include <fix-fp-int-compare-invalid.h> |
24 | |
25 | int |
26 | M_DECL_FUNC (__iseqsig) (FLOAT x, FLOAT y) |
27 | { |
28 | /* Comparing <= and >= is sufficient to determine both whether X and |
29 | Y are equal, and whether they are unordered, while raising the |
30 | "invalid" exception if they are unordered. */ |
31 | bool cmp1 = x <= y; |
32 | bool cmp2 = x >= y; |
33 | if (cmp1 && cmp2) |
34 | return 1; |
35 | else if (!cmp1 && !cmp2) |
36 | { |
37 | if (FIX_COMPARE_INVALID) |
38 | __feraiseexcept (FE_INVALID); |
39 | __set_errno (EDOM); |
40 | } |
41 | return 0; |
42 | } |
43 | |