36 lines
1.5 KiB
C
36 lines
1.5 KiB
C
/* Define iscanonical macro. ldbl-128ibm version.
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Copyright (C) 2016 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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<http://www.gnu.org/licenses/>. */
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#ifndef _MATH_H
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# error "Never use <bits/iscanonical.h> directly; include <math.h> instead."
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#endif
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extern int __iscanonicall (long double __x)
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__THROW __attribute__ ((__const__));
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/* Return nonzero value if X is canonical. In IEEE interchange binary
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formats, all values are canonical, but the argument must still be
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converted to its semantic type for any exceptions arising from the
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conversion, before being discarded; in IBM long double, there are
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encodings that are not consistently handled as corresponding to any
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particular value of the type, and we return 0 for those. */
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#define iscanonical(x) \
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(sizeof (x) == sizeof (long double) \
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? __iscanonicall (x) \
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: ((void) (__typeof (x)) (x), 1))
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