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Edit File : floatn.h \| Size : 4.27 KB
/* 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> / 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__ / 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 typedef __float128 _Float128; # endif / __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 #endif /* !__ASSEMBLER__. / #include <bits/floatn-common.h> #endif / _BITS_FLOATN_H */ Back

Edit File : floatn.h | Size : 4.27 KB

/* 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>

/* 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__

/* 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
typedef __float128 _Float128;
#  endif

/* __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

#endif /* !__ASSEMBLER__.  */

#include <bits/floatn-common.h>

#endif /* _BITS_FLOATN_H */

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