| /* Test whether X == Y. |
| Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <fenv.h> |
| #include <math.h> |
| #include <math_private.h> |
| #include <stdbool.h> |
| #include <fix-fp-int-compare-invalid.h> |
| |
| int |
| M_DECL_FUNC (__iseqsig) (FLOAT x, FLOAT y) |
| { |
| /* Comparing <= and >= is sufficient to determine both whether X and |
| Y are equal, and whether they are unordered, while raising the |
| "invalid" exception if they are unordered. */ |
| bool cmp1 = x <= y; |
| bool cmp2 = x >= y; |
| if (cmp1 && cmp2) |
| return 1; |
| else if (!cmp1 && !cmp2) |
| { |
| if (FIX_COMPARE_INVALID) |
| __feraiseexcept (FE_INVALID); |
| __set_errno (EDOM); |
| } |
| return 0; |
| } |