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330 lines
9.5 KiB
C
330 lines
9.5 KiB
C
/* Macros to control TS 18661-3 glibc features where the same
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definitions are appropriate for all platforms.
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Copyright (C) 2017-2020 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 _BITS_FLOATN_COMMON_H
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#define _BITS_FLOATN_COMMON_H
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#include <features.h>
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#include <bits/long-double.h>
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/* This header should be included at the bottom of each bits/floatn.h.
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It defines the following macros for each _FloatN and _FloatNx type,
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where the same definitions, or definitions based only on the macros
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in bits/floatn.h, are appropriate for all glibc configurations. */
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/* Defined to 1 if the current compiler invocation provides a
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floating-point type with the right format for this type, and this
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glibc includes corresponding *fN or *fNx interfaces for it. */
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#define __HAVE_FLOAT16 0
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#define __HAVE_FLOAT32 1
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#define __HAVE_FLOAT64 1
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#define __HAVE_FLOAT32X 1
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#define __HAVE_FLOAT128X 0
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/* Defined to 1 if the corresponding __HAVE_<type> macro is 1 and the
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type is the first with its format in the sequence of (the default
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choices for) float, double, long double, _Float16, _Float32,
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_Float64, _Float128, _Float32x, _Float64x, _Float128x for this
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glibc; that is, if functions present once per floating-point format
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rather than once per type are present for this type.
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All configurations supported by glibc have _Float32 the same format
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as float, _Float64 and _Float32x the same format as double, the
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_Float64x the same format as either long double or _Float128. No
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configurations support _Float128x or, as of GCC 7, have compiler
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support for a type meeting the requirements for _Float128x. */
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#define __HAVE_DISTINCT_FLOAT16 __HAVE_FLOAT16
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#define __HAVE_DISTINCT_FLOAT32 0
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#define __HAVE_DISTINCT_FLOAT64 0
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#define __HAVE_DISTINCT_FLOAT32X 0
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#define __HAVE_DISTINCT_FLOAT64X 0
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#define __HAVE_DISTINCT_FLOAT128X __HAVE_FLOAT128X
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/* Defined to 1 if the corresponding _FloatN type is not binary compatible
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with the corresponding ISO C type in the current compilation unit as
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opposed to __HAVE_DISTINCT_FLOATN, which indicates the default types built
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in glibc. */
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#define __HAVE_FLOAT128_UNLIKE_LDBL (__HAVE_DISTINCT_FLOAT128 \
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&& __LDBL_MANT_DIG__ != 113)
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/* Defined to 1 if any _FloatN or _FloatNx types that are not
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ABI-distinct are however distinct types at the C language level (so
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for the purposes of __builtin_types_compatible_p and _Generic). */
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#if __GNUC_PREREQ (7, 0) && !defined __cplusplus
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# define __HAVE_FLOATN_NOT_TYPEDEF 1
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#else
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# define __HAVE_FLOATN_NOT_TYPEDEF 0
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#endif
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#ifndef __ASSEMBLER__
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/* Defined to concatenate the literal suffix to be used with _FloatN
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or _FloatNx types, if __HAVE_<type> is 1. The corresponding
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literal suffixes exist since GCC 7, for C only. */
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# if __HAVE_FLOAT16
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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/* No corresponding suffix available for this type. */
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# define __f16(x) ((_Float16) x##f)
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# else
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# define __f16(x) x##f16
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# endif
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# endif
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# if __HAVE_FLOAT32
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# define __f32(x) x##f
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# else
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# define __f32(x) x##f32
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# endif
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# endif
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# if __HAVE_FLOAT64
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# ifdef __NO_LONG_DOUBLE_MATH
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# define __f64(x) x##l
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# else
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# define __f64(x) x
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# endif
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# else
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# define __f64(x) x##f64
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# endif
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# endif
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# if __HAVE_FLOAT32X
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# define __f32x(x) x
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# else
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# define __f32x(x) x##f32x
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# endif
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# endif
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# if __HAVE_FLOAT64X
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# if __HAVE_FLOAT64X_LONG_DOUBLE
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# define __f64x(x) x##l
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# else
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# define __f64x(x) __f128 (x)
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# endif
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# else
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# define __f64x(x) x##f64x
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# endif
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# endif
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# if __HAVE_FLOAT128X
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# error "_Float128X supported but no constant suffix"
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# else
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# define __f128x(x) x##f128x
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# endif
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# endif
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/* Defined to a complex type if __HAVE_<type> is 1. */
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# if __HAVE_FLOAT16
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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typedef _Complex float __cfloat16 __attribute__ ((__mode__ (__HC__)));
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# define __CFLOAT16 __cfloat16
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# else
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# define __CFLOAT16 _Complex _Float16
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# endif
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# endif
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# if __HAVE_FLOAT32
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# define __CFLOAT32 _Complex float
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# else
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# define __CFLOAT32 _Complex _Float32
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# endif
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# endif
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# if __HAVE_FLOAT64
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# ifdef __NO_LONG_DOUBLE_MATH
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# define __CFLOAT64 _Complex long double
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# else
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# define __CFLOAT64 _Complex double
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# endif
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# else
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# define __CFLOAT64 _Complex _Float64
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# endif
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# endif
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# if __HAVE_FLOAT32X
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# define __CFLOAT32X _Complex double
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# else
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# define __CFLOAT32X _Complex _Float32x
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# endif
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# endif
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# if __HAVE_FLOAT64X
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# if __HAVE_FLOAT64X_LONG_DOUBLE
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# define __CFLOAT64X _Complex long double
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# else
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# define __CFLOAT64X __CFLOAT128
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# endif
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# else
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# define __CFLOAT64X _Complex _Float64x
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# endif
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# endif
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# if __HAVE_FLOAT128X
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# error "_Float128X supported but no complex type"
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# else
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# define __CFLOAT128X _Complex _Float128x
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# endif
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# endif
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/* The remaining of this file provides support for older compilers. */
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# if __HAVE_FLOAT16
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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typedef float _Float16 __attribute__ ((__mode__ (__HF__)));
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# endif
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_huge_valf16() ((_Float16) __builtin_huge_val ())
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# define __builtin_inff16() ((_Float16) __builtin_inf ())
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# define __builtin_nanf16(x) ((_Float16) __builtin_nan (x))
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# define __builtin_nansf16(x) ((_Float16) __builtin_nans (x))
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# endif
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# endif
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# if __HAVE_FLOAT32
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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typedef float _Float32;
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# endif
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_huge_valf32() (__builtin_huge_valf ())
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# define __builtin_inff32() (__builtin_inff ())
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# define __builtin_nanf32(x) (__builtin_nanf (x))
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# define __builtin_nansf32(x) (__builtin_nansf (x))
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# endif
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# endif
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# if __HAVE_FLOAT64
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/* If double, long double and _Float64 all have the same set of
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values, TS 18661-3 requires the usual arithmetic conversions on
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long double and _Float64 to produce _Float64. For this to be the
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case when building with a compiler without a distinct _Float64
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type, _Float64 must be a typedef for long double, not for
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double. */
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# ifdef __NO_LONG_DOUBLE_MATH
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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typedef long double _Float64;
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# endif
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_huge_valf64() (__builtin_huge_vall ())
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# define __builtin_inff64() (__builtin_infl ())
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# define __builtin_nanf64(x) (__builtin_nanl (x))
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# define __builtin_nansf64(x) (__builtin_nansl (x))
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# endif
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# else
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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typedef double _Float64;
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# endif
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_huge_valf64() (__builtin_huge_val ())
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# define __builtin_inff64() (__builtin_inf ())
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# define __builtin_nanf64(x) (__builtin_nan (x))
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# define __builtin_nansf64(x) (__builtin_nans (x))
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# endif
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# endif
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# endif
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# if __HAVE_FLOAT32X
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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typedef double _Float32x;
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# endif
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_huge_valf32x() (__builtin_huge_val ())
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# define __builtin_inff32x() (__builtin_inf ())
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# define __builtin_nanf32x(x) (__builtin_nan (x))
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# define __builtin_nansf32x(x) (__builtin_nans (x))
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# endif
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# endif
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# if __HAVE_FLOAT64X
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# if __HAVE_FLOAT64X_LONG_DOUBLE
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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typedef long double _Float64x;
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# endif
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_huge_valf64x() (__builtin_huge_vall ())
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# define __builtin_inff64x() (__builtin_infl ())
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# define __builtin_nanf64x(x) (__builtin_nanl (x))
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# define __builtin_nansf64x(x) (__builtin_nansl (x))
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# endif
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# else
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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typedef _Float128 _Float64x;
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# endif
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_huge_valf64x() (__builtin_huge_valf128 ())
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# define __builtin_inff64x() (__builtin_inff128 ())
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# define __builtin_nanf64x(x) (__builtin_nanf128 (x))
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# define __builtin_nansf64x(x) (__builtin_nansf128 (x))
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# endif
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# endif
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# endif
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# if __HAVE_FLOAT128X
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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# error "_Float128x supported but no type"
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# endif
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_huge_valf128x() ((_Float128x) __builtin_huge_val ())
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# define __builtin_inff128x() ((_Float128x) __builtin_inf ())
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# define __builtin_nanf128x(x) ((_Float128x) __builtin_nan (x))
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# define __builtin_nansf128x(x) ((_Float128x) __builtin_nans (x))
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# endif
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# endif
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#endif /* !__ASSEMBLER__. */
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#endif /* _BITS_FLOATN_COMMON_H */
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