38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
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/* Canonicalize floating-point representation.
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Copyright (C) 2016-2022 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 <math.h>
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int
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M_DECL_FUNC (__canonicalize) (FLOAT *cx, const FLOAT *x)
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{
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FLOAT val = *x;
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/* For all binary formats supported by glibc, iscanonical only fails
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if the representation is not a valid representation of the type,
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so the only work to do is for signaling NaNs. */
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if (!iscanonical (val))
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return 1;
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if (issignaling (val))
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*cx = val + val;
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else
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*cx = val;
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return 0;
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}
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declare_mgen_alias (__canonicalize, canonicalize)
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