sysdeps/ieee754/ldbl-128/bits/floatn.h

   1 /* Macros to control TS 18661-3 glibc features on ldbl-128 platforms.
   2    Copyright (C) 2017-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _BITS_FLOATN_H
  20 #define _BITS_FLOATN_H
  21
  22 #include <features.h>
  23 #include <bits/long-double.h>
  24
  25 /* Defined to 1 if the current compiler invocation provides a
  26    floating-point type with the IEEE 754 binary128 format, and this
  27    glibc includes corresponding *f128 interfaces for it.  */
  28 #ifndef __NO_LONG_DOUBLE_MATH
  29 # define __HAVE_FLOAT128 1
  30 #else
  31 /* glibc does not support _Float128 for platforms where long double is
  32    normally binary128 when building with long double as binary64.
  33    GCC's default for supported scalar modes does not support it either
  34    in that case.  */
  35 # define __HAVE_FLOAT128 0
  36 #endif
  37
  38 /* Defined to 1 if __HAVE_FLOAT128 is 1 and the type is ABI-distinct
  39    from the default float, double and long double types in this glibc.  */
  40 #define __HAVE_DISTINCT_FLOAT128 0
  41
  42 /* Defined to 1 if the current compiler invocation provides a
  43    floating-point type with the right format for _Float64x, and this
  44    glibc includes corresponding *f64x interfaces for it.  */
  45 #define __HAVE_FLOAT64X __HAVE_FLOAT128
  46
  47 /* Defined to 1 if __HAVE_FLOAT64X is 1 and _Float64x has the format
  48    of long double.  Otherwise, if __HAVE_FLOAT64X is 1, _Float64x has
  49    the format of _Float128, which must be different from that of long
  50    double.  */
  51 #define __HAVE_FLOAT64X_LONG_DOUBLE __HAVE_FLOAT128
  52
  53 #ifndef __ASSEMBLER__
  54
  55 /* Defined to concatenate the literal suffix to be used with _Float128
  56    types, if __HAVE_FLOAT128 is 1. */
  57 # if __HAVE_FLOAT128
  58 #  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
  59 /* The literal suffix f128 exists only since GCC 7.0.  */
  60 #   define __f128(x) x##l
  61 #  else
  62 #   define __f128(x) x##f128
  63 #  endif
  64 # endif
  65
  66 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1.  */
  67 # if __HAVE_FLOAT128
  68 #  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
  69 #   define __CFLOAT128 _Complex long double
  70 #  else
  71 #   define __CFLOAT128 _Complex _Float128
  72 #  endif
  73 # endif
  74
  75 /* The remaining of this file provides support for older compilers.  */
  76 # if __HAVE_FLOAT128
  77
  78 /* The type _Float128 exists only since GCC 7.0.  */
  79 #  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
  80 typedef long double _Float128;
  81 #  endif
  82
  83 /* Various built-in functions do not exist before GCC 7.0.  */
  84 #  if !__GNUC_PREREQ (7, 0)
  85 #   define __builtin_huge_valf128() (__builtin_huge_vall ())
  86 #   define __builtin_inff128() (__builtin_infl ())
  87 #   define __builtin_nanf128(x) (__builtin_nanl (x))
  88 #   define __builtin_nansf128(x) (__builtin_nansl (x))
  89 #  endif
  90
  91 # endif
  92
  93 #endif /* !__ASSEMBLER__.  */
  94
  95 #include <bits/floatn-common.h>
  96
  97 #endif /* _BITS_FLOATN_H */