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8dbfea3a20
Modify the headers to redirect long double functions to global __*f128 symbols or to __*ieee128 otherwise. Most of the functions in math.h benefit from the infrastructure already available for __LDBL_COMPAT. The only exceptions are nexttowardf and nexttoward that need especial treatment. Both math/bits/mathcalls-helper-functions.h and math/bits/mathcalls.h were modified in order to provide alternative redirection destinations that are essential to support functions that should not be redirected to the same name pattern of the rest of the functions, i.e.: __fpclassify, __signbit, __iseqsig, __issignaling, isinf, finite and isnan, which will be redirected to __*f128 instead of __*ieee128 used for the rest.
65 lines
2.8 KiB
C
65 lines
2.8 KiB
C
/* Define iscanonical macro. ldbl-128ibm version.
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Copyright (C) 2016-2020 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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#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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#ifdef __NO_LONG_DOUBLE_MATH
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# define iscanonical(x) ((void) (__typeof (x)) (x), 1)
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#else
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# if __LONG_DOUBLE_USES_FLOAT128 == 1
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# define __iscanonicall(x) ((void) (__typeof (x)) (x), 1)
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# else
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extern int __iscanonicall (long double __x)
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__THROW __attribute__ ((__const__));
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# endif
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# define __iscanonicalf(x) ((void) (__typeof (x)) (x), 1)
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# define __iscanonical(x) ((void) (__typeof (x)) (x), 1)
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# if __HAVE_DISTINCT_FLOAT128
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# define __iscanonicalf128(x) ((void) (__typeof (x)) (x), 1)
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# endif
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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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# ifndef __cplusplus
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# define iscanonical(x) __MATH_TG ((x), __iscanonical, (x))
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# else
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/* In C++ mode, __MATH_TG cannot be used, because it relies on
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__builtin_types_compatible_p, which is a C-only builtin. On the
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other hand, overloading provides the means to distinguish between
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the floating-point types. The overloading resolution will match
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the correct parameter (regardless of type qualifiers (i.e.: const
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and volatile)). */
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extern "C++" {
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inline int iscanonical (float __val) { return __iscanonicalf (__val); }
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inline int iscanonical (double __val) { return __iscanonical (__val); }
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inline int iscanonical (long double __val) { return __iscanonicall (__val); }
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/* When using an IEEE 128-bit long double, _Float128 is defined as long double
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in C++. */
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# if __HAVE_DISTINCT_FLOAT128 && __HAVE_FLOAT128_UNLIKE_LDBL
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inline int iscanonical (_Float128 __val) { return __iscanonicalf128 (__val); }
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# endif
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}
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# endif /* __cplusplus */
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#endif /* __NO_LONG_DOUBLE_MATH */
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