| /* Macros to control TS 18661-3 glibc features on x86. |
| Copyright (C) 2017-2018 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_H |
| #define _BITS_FLOATN_H |
| |
| #include <features.h> |
| |
| #if 0 /* for macro expansion debugging */ |
| #define capture(sym, val) extern int sym[val] |
| #endif |
| |
| /* Defined to 1 if the current compiler invocation provides a |
| floating-point type with the IEEE 754 binary128 format, and this |
| glibc includes corresponding *f128 interfaces for it. The required |
| libgcc support was added some time after the basic compiler |
| support, for x86_64 and x86. */ |
| #if (defined __x86_64__ \ |
| ? __GNUC_PREREQ (4, 3) \ |
| : (defined __GNU__ ? __GNUC_PREREQ (4, 5) : __GNUC_PREREQ (4, 4))) |
| # define __HAVE_FLOAT128 1 |
| #else |
| # define __HAVE_FLOAT128 0 |
| #endif |
| |
| /* Defined to 1 if __HAVE_FLOAT128 is 1 and the type is ABI-distinct |
| from the default float, double and long double types in this glibc. */ |
| #if __HAVE_FLOAT128 |
| # define __HAVE_DISTINCT_FLOAT128 1 |
| #else |
| # define __HAVE_DISTINCT_FLOAT128 0 |
| #endif |
| |
| /* Defined to 1 if the current compiler invocation provides a |
| floating-point type with the right format for _Float64x, and this |
| glibc includes corresponding *f64x interfaces for it. */ |
| #define __HAVE_FLOAT64X 1 |
| |
| /* 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 1 |
| |
| #ifndef __ASSEMBLER__ |
| |
| #if 0 /* for macro expansion debugging */ |
| capture(i_have_float128, __HAVE_FLOAT128); |
| capture(i_have_distinct_float128, __HAVE_DISTINCT_FLOAT128); |
| #endif |
| |
| /* Defined to concatenate the literal suffix to be used with _Float128 |
| types, if __HAVE_FLOAT128 is 1. */ |
| # if __HAVE_FLOAT128 |
| # if !__GNUC_PREREQ (7, 0) || defined __cplusplus |
| /* The literal suffix f128 exists only since GCC 7.0. */ |
| # define __f128(x) x##q |
| # else |
| # define __f128(x) x##f128 |
| # endif |
| # endif |
| |
| /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1. */ |
| # if __HAVE_FLOAT128 |
| # if !__GNUC_PREREQ (7, 0) || defined __cplusplus |
| /* Add a typedef for older GCC compilers which don't natively support |
| _Complex _Float128. */ |
| typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__TC__))); |
| # define __CFLOAT128 __cfloat128 |
| # else |
| # define __CFLOAT128 _Complex _Float128 |
| # endif |
| # endif |
| |
| /* The remaining of this file provides support for older compilers. */ |
| # if __HAVE_FLOAT128 |
| |
| /* The type _Float128 exists only since GCC 7.0. */ |
| # if !__GNUC_PREREQ (7, 0) || defined __cplusplus |
| /* need a clang 5.0 case here? */ |
| typedef __float128 _Float128; |
| # endif |
| |
| #if defined __clang__ |
| |
| #if 0 /* clang 5.0 or less */ |
| #define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ()) |
| #define __builtin_inff128() ((_Float128) __builtin_inf ()) |
| #define __builtin_nanf128(x) ((_Float128) __builtin_nan (x)) |
| #define __builtin_nansf128(x) ((_Float128) __builtin_nans (x)) |
| |
| #define __builtin_copysignf128(x,y) ((_Float128) __builtin_copysign ((double)(x),(double)(y))) |
| #define __builtin_fabsf128(x) ((_Float128) __builtin_fabs ((double)(x))) |
| #endif |
| #define __builtin_signbitf128(x) (__builtin_signbit (x)) |
| |
| #else /* GCC */ |
| |
| /* __builtin_huge_valf128 doesn't exist before GCC 7.0. */ |
| # if !__GNUC_PREREQ (7, 0) |
| # define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ()) |
| # endif |
| |
| /* Older GCC has only a subset of built-in functions for _Float128 on |
| x86, and __builtin_infq is not usable in static initializers. |
| Converting a narrower sNaN to _Float128 produces a quiet NaN, so |
| attempts to use _Float128 sNaNs will not work properly with older |
| compilers. */ |
| # if !__GNUC_PREREQ (7, 0) |
| # define __builtin_copysignf128 __builtin_copysignq |
| # define __builtin_fabsf128 __builtin_fabsq |
| # define __builtin_inff128() ((_Float128) __builtin_inf ()) |
| # define __builtin_nanf128(x) ((_Float128) __builtin_nan (x)) |
| # define __builtin_nansf128(x) ((_Float128) __builtin_nans (x)) |
| # endif |
| |
| /* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*, |
| e.g.: __builtin_signbitf128, before GCC 6. However, there has never |
| been a __builtin_signbitf128 in GCC and the type-generic builtin is |
| only available since GCC 6. */ |
| # if !__GNUC_PREREQ (6, 0) |
| # define __builtin_signbitf128 __signbitf128 |
| # endif |
| |
| #endif /* clang or GCC */ |
| |
| # endif |
| |
| #if !__HAVE_FLOAT128 && defined __clang__ |
| typedef long double _Float128; |
| #endif |
| |
| #endif /* !__ASSEMBLER__. */ |
| |
| #include <bits/floatn-common.h> |
| |
| #endif /* _BITS_FLOATN_H */ |