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Diffstat (limited to 'bits/floatn-common.h')
| -rw-r--r-- | bits/floatn-common.h | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/bits/floatn-common.h b/bits/floatn-common.h new file mode 100644 index 0000000000..1b3ab51aaf --- /dev/null +++ b/bits/floatn-common.h @@ -0,0 +1,292 @@ +/* Macros to control TS 18661-3 glibc features where the same + definitions are appropriate for all platforms. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _BITS_FLOATN_COMMON_H +#define _BITS_FLOATN_COMMON_H + +#include <features.h> + +/* This header should be included at the bottom of each bits/floatn.h. + It defines the following macros for each _FloatN and _FloatNx type, + where the same definitions, or definitions based only on the macros + in bits/floatn.h, are appropriate for all glibc configurations. */ + +/* Defined to 1 if the current compiler invocation provides a + floating-point type with the right format for this type, and this + glibc includes corresponding *fN or *fNx interfaces for it. */ +#define __HAVE_FLOAT16 0 +#define __HAVE_FLOAT32 0 +#define __HAVE_FLOAT64 0 +#define __HAVE_FLOAT32X 0 +#define __HAVE_FLOAT64X 0 +#define __HAVE_FLOAT128X 0 + +/* Defined to 1 if the corresponding __HAVE_<type> macro is 1 and the + type is the first with its format in the sequence of (the default + choices for) float, double, long double, _Float16, _Float32, + _Float64, _Float128, _Float32x, _Float64x, _Float128x for this + glibc; that is, if functions present once per floating-point format + rather than once per type are present for this type. + + All configurations supported by glibc have _Float32 the same format + as float, _Float64 and _Float32x the same format as double, the + _Float64x the same format as either long double or _Float128. No + configurations support _Float128x or, as of GCC 7, have compiler + support for a type meeting the requirements for _Float128x. */ +#define __HAVE_DISTINCT_FLOAT16 __HAVE_FLOAT16 +#define __HAVE_DISTINCT_FLOAT32 0 +#define __HAVE_DISTINCT_FLOAT64 0 +#define __HAVE_DISTINCT_FLOAT32X 0 +#define __HAVE_DISTINCT_FLOAT64X 0 +#define __HAVE_DISTINCT_FLOAT128X __HAVE_FLOAT128X + +/* Defined to 1 if __HAVE_FLOAT64X is 1 and _Float64x has the format + of long double. Otherwise, if __HAVE_FLOAT64X is 1, _Float64x has + the format of _Float128, which must be different from that of long + double. */ +#define __HAVE_FLOAT64X_LONG_DOUBLE 0 + +/* Defined to 1 if any _FloatN or _FloatNx types that are not + ABI-distinct are however distinct types at the C language level (so + for the purposes of __builtin_types_compatible_p and _Generic). */ +#if __GNUC_PREREQ (7, 0) && !defined __cplusplus +# define __HAVE_FLOATN_NOT_TYPEDEF 1 +#else +# define __HAVE_FLOATN_NOT_TYPEDEF 0 +#endif + +/* Defined to concatenate the literal suffix to be used with _FloatN + or _FloatNx types, if __HAVE_<type> is 1. The corresponding + literal suffixes exist since GCC 7, for C only. */ +#if __HAVE_FLOAT16 +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +/* No corresponding suffix available for this type. */ +# define __f16(x) ((_Float16) x##f) +# else +# define __f16(x) x##f16 +# endif +#endif + +#if __HAVE_FLOAT32 +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# define __f32(x) x##f +# else +# define __f32(x) x##f32 +# endif +#endif + +#if __HAVE_FLOAT64 +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# define __f64(x) x +# else +# define __f64(x) x##f64 +# endif +#endif + +#if __HAVE_FLOAT32X +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# define __f32x(x) x +# else +# define __f32x(x) x##f32x +# endif +#endif + +#if __HAVE_FLOAT64X +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# if __HAVE_FLOAT64X_LONG_DOUBLE +# define __f64x(x) x##l +# else +# define __f64x(x) __f128 (x) +# endif +# else +# define __f64x(x) x##f64x +# endif +#endif + +#if __HAVE_FLOAT128X +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# error "_Float128X supported but no constant suffix" +# else +# define __f128x(x) x##f128x +# endif +#endif + +/* Defined to a complex type if __HAVE_<type> is 1. */ +#if __HAVE_FLOAT16 +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +typedef _Complex float __cfloat16 __attribute__ ((__mode__ (__HC__))); +# define __CFLOAT16 __cfloat16 +# else +# define __CFLOAT16 _Complex _Float16 +# endif +#endif + +#if __HAVE_FLOAT32 +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# define __CFLOAT32 _Complex float +# else +# define __CFLOAT32 _Complex _Float32 +# endif +#endif + +#if __HAVE_FLOAT64 +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# define __CFLOAT64 _Complex double +# else +# define __CFLOAT64 _Complex _Float64 +# endif +#endif + +#if __HAVE_FLOAT32X +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# define __CFLOAT32X _Complex double +# else +# define __CFLOAT32X _Complex _Float32x +# endif +#endif + +#if __HAVE_FLOAT64X +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# if __HAVE_FLOAT64X_LONG_DOUBLE +# define __CFLOAT64X _Complex long double +# else +# define __CFLOAT64X __CFLOAT128 +# endif +# else +# define __CFLOAT64X _Complex _Float64x +# endif +#endif + +#if __HAVE_FLOAT128X +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# error "_Float128X supported but no complex type" +# else +# define __CFLOAT128X _Complex _Float128x +# endif +#endif + +/* The remaining of this file provides support for older compilers. */ +#if __HAVE_FLOAT16 + +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +typedef float _Float16 __attribute__ ((__mode__ (__HF__))); +# endif + +# if !__GNUC_PREREQ (7, 0) +# define __builtin_huge_valf16() ((_Float16) __builtin_huge_val ()) +# define __builtin_inff16() ((_Float16) __builtin_inf ()) +# define __builtin_nanf16(x) ((_Float16) __builtin_nan (x)) +# define __builtin_nansf16(x) ((_Float16) __builtin_nans (x)) +# endif + +#endif + +#if __HAVE_FLOAT32 + +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +typedef float _Float32; +# endif + +# if !__GNUC_PREREQ (7, 0) +# define __builtin_huge_valf32() (__builtin_huge_valf ()) +# define __builtin_inff32() (__builtin_inff ()) +# define __builtin_nanf32(x) (__builtin_nanf (x)) +# define __builtin_nansf32(x) (__builtin_nansf (x)) +# endif + +#endif + +#if __HAVE_FLOAT64 + +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +typedef double _Float64; +# endif + +# if !__GNUC_PREREQ (7, 0) +# define __builtin_huge_valf64() (__builtin_huge_val ()) +# define __builtin_inff64() (__builtin_inf ()) +# define __builtin_nanf64(x) (__builtin_nan (x)) +# define __builtin_nansf64(x) (__builtin_nans (x)) +# endif + +#endif + +#if __HAVE_FLOAT32X + +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +typedef double _Float32x; +# endif + +# if !__GNUC_PREREQ (7, 0) +# define __builtin_huge_valf32x() (__builtin_huge_val ()) +# define __builtin_inff32x() (__builtin_inf ()) +# define __builtin_nanf32x(x) (__builtin_nan (x)) +# define __builtin_nansf32x(x) (__builtin_nans (x)) +# endif + +#endif + +#if __HAVE_FLOAT64X + +# if __HAVE_FLOAT64X_LONG_DOUBLE + +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +typedef long double _Float64x; +# endif + +# if !__GNUC_PREREQ (7, 0) +# define __builtin_huge_valf64x() (__builtin_huge_vall ()) +# define __builtin_inff64x() (__builtin_infl ()) +# define __builtin_nanf64x(x) (__builtin_nanl (x)) +# define __builtin_nansf64x(x) (__builtin_nansl (x)) +# endif + +# else + +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +typedef _Float128 _Float64x; +# endif + +# if !__GNUC_PREREQ (7, 0) +# define __builtin_huge_valf64x() (__builtin_huge_valf128 ()) +# define __builtin_inff64x() (__builtin_inff128 ()) +# define __builtin_nanf64x(x) (__builtin_nanf128 (x)) +# define __builtin_nansf64x(x) (__builtin_nansf128 (x)) +# endif + +# endif + +#endif + +#if __HAVE_FLOAT128X + +# if !__GNUC_PREREQ (7, 0) || defined __cplusplus +# error "_Float128x supported but no type" +# endif + +# if !__GNUC_PREREQ (7, 0) +# define __builtin_huge_valf128x() ((_Float128x) __builtin_huge_val ()) +# define __builtin_inff128x() ((_Float128x) __builtin_inf ()) +# define __builtin_nanf128x(x) ((_Float128x) __builtin_nan (x)) +# define __builtin_nansf128x(x) ((_Float128x) __builtin_nans (x)) +# endif + +#endif + +#endif /* _BITS_FLOATN_COMMON_H */ |