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1e7c8fcc | 1 | /* Test whether X == Y. |
2b778ceb | 2 | Copyright (C) 2016-2021 Free Software Foundation, Inc. |
1e7c8fcc JM |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
1e7c8fcc JM |
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) | |
826aa134 | 38 | __feraiseexcept (FE_INVALID); |
1e7c8fcc JM |
39 | __set_errno (EDOM); |
40 | } | |
41 | return 0; | |
42 | } |