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floatn-common.h
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/* Macros to control TS 18661-3 glibc features where the same definitions are appropriate for all platforms. Copyright (C) 2017-2021 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 <https://www.gnu.org/licenses/>. */ #ifndef _BITS_FLOATN_COMMON_H #define _BITS_FLOATN_COMMON_H #include <features.h> #include <bits/long-double.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 1 #define __HAVE_FLOAT64 1 #define __HAVE_FLOAT32X 1 #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 the corresponding _FloatN type is not binary compatible with the corresponding ISO C type in the current compilation unit as opposed to __HAVE_DISTINCT_FLOATN, which indicates the default types built in glibc. */ #define __HAVE_FLOAT128_UNLIKE_LDBL (__HAVE_DISTINCT_FLOAT128 \ && __LDBL_MANT_DIG__ != 113) /* 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 #ifndef __ASSEMBLER__ /* 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 && !__GNUC_PREREQ (13, 0)) /* 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 && !__GNUC_PREREQ (13, 0)) # define __f32(x) x##f # else # define __f32(x) x##f32 # endif # endif # if __HAVE_FLOAT64 # if !__GNUC_PREREQ (7, 0) || (defined __cplusplus && !__GNUC_PREREQ (13, 0)) # ifdef __NO_LONG_DOUBLE_MATH # define __f64(x) x##l # else # define __f64(x) x # endif # else # define __f64(x) x##f64 # endif # endif # if __HAVE_FLOAT32X # if !__GNUC_PREREQ (7, 0) || (defined __cplusplus && !__GNUC_PREREQ (13, 0)) # define __f32x(x) x # else # define __f32x(x) x##f32x # endif # endif # if __HAVE_FLOAT64X # if !__GNUC_PREREQ (7, 0) || (defined __cplusplus && !__GNUC_PREREQ (13, 0)) # 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 && !__GNUC_PREREQ (13, 0)) # 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 && !__GNUC_PREREQ (13, 0)) 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 && !__GNUC_PREREQ (13, 0)) # define __CFLOAT32 _Complex float # else # define __CFLOAT32 _Complex _Float32 # endif # endif # if __HAVE_FLOAT64 # if !__GNUC_PREREQ (7, 0) || (defined __cplusplus && !__GNUC_PREREQ (13, 0)) # ifdef __NO_LONG_DOUBLE_MATH # define __CFLOAT64 _Complex long double # else # define __CFLOAT64 _Complex double # endif # else # define __CFLOAT64 _Complex _Float64 # endif # endif # if __HAVE_FLOAT32X # if !__GNUC_PREREQ (7, 0) || (defined __cplusplus && !__GNUC_PREREQ (13, 0)) # define __CFLOAT32X _Complex double # else # define __CFLOAT32X _Complex _Float32x # endif # endif # if __HAVE_FLOAT64X # if !__GNUC_PREREQ (7, 0) || (defined __cplusplus && !__GNUC_PREREQ (13, 0)) # 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 && !__GNUC_PREREQ (13, 0)) # 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 && !__GNUC_PREREQ (13, 0)) 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 && !__GNUC_PREREQ (13, 0)) 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 double, long double and _Float64 all have the same set of values, TS 18661-3 requires the usual arithmetic conversions on long double and _Float64 to produce _Float64. For this to be the case when building with a compiler without a distinct _Float64 type, _Float64 must be a typedef for long double, not for double. */ # ifdef __NO_LONG_DOUBLE_MATH # if !__GNUC_PREREQ (7, 0) || (defined __cplusplus && !__GNUC_PREREQ (13, 0)) typedef long double _Float64; # endif # if !__GNUC_PREREQ (7, 0) # define __builtin_huge_valf64() (__builtin_huge_vall ()) # define __builtin_inff64() (__builtin_infl ()) # define __builtin_nanf64(x) (__builtin_nanl (x)) # define __builtin_nansf64(x) (__builtin_nansl (x)) # endif # else # if !__GNUC_PREREQ (7, 0) || (defined __cplusplus && !__GNUC_PREREQ (13, 0)) 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 # endif # if __HAVE_FLOAT32X # if !__GNUC_PREREQ (7, 0) || (defined __cplusplus && !__GNUC_PREREQ (13, 0)) 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 && !__GNUC_PREREQ (13, 0)) 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 && !__GNUC_PREREQ (13, 0)) 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 && !__GNUC_PREREQ (13, 0)) # 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 /* !__ASSEMBLER__. */ #endif /* _BITS_FLOATN_COMMON_H */