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43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/* Test whether X == Y.
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Copyright (C) 2016-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <fenv.h>
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#include <math.h>
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#include <stdbool.h>
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#include <fix-fp-int-compare-invalid.h>
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int
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M_DECL_FUNC (__iseqsig) (FLOAT x, FLOAT y)
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{
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/* Comparing <= and >= is sufficient to determine both whether X and
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Y are equal, and whether they are unordered, while raising the
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"invalid" exception if they are unordered. */
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bool cmp1 = x <= y;
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bool cmp2 = x >= y;
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if (cmp1 && cmp2)
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return 1;
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else if (!cmp1 && !cmp2)
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{
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if (FIX_COMPARE_INVALID)
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__feraiseexcept (FE_INVALID);
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__set_errno (EDOM);
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}
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return 0;
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}
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