sysdeps/ia64/bits/floatn.h

   1 /* Macros to control TS 18661-3 glibc features on ia64.
   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
  24 /* Defined to 1 if the current compiler invocation provides a
  25    floating-point type with the IEEE 754 binary128 format, and this
  26    glibc includes corresponding *f128 interfaces for it.  The required
  27    libgcc support was added some time after the basic compiler
  28    support.  */
  29 #if __GNUC_PREREQ (4, 4)
  30 # define __HAVE_FLOAT128 1
  31 #else
  32 # define __HAVE_FLOAT128 0
  33 #endif
  34
  35 /* Defined to 1 if __HAVE_FLOAT128 is 1 and the type is ABI-distinct
  36    from the default float, double and long double types in this glibc.  */
  37 #if __HAVE_FLOAT128
  38 # define __HAVE_DISTINCT_FLOAT128 1
  39 #else
  40 # define __HAVE_DISTINCT_FLOAT128 0
  41 #endif
  42
  43 /* Defined to 1 if the current compiler invocation provides a
  44    floating-point type with the right format for _Float64x, and this
  45    glibc includes corresponding *f64x interfaces for it.  */
  46 #define __HAVE_FLOAT64X 1
  47
  48 /* Defined to 1 if __HAVE_FLOAT64X is 1 and _Float64x has the format
  49    of long double.  Otherwise, if __HAVE_FLOAT64X is 1, _Float64x has
  50    the format of _Float128, which must be different from that of long
  51    double.  */
  52 #define __HAVE_FLOAT64X_LONG_DOUBLE 1
  53
  54 #ifndef __ASSEMBLER__
  55
  56 /* Defined to concatenate the literal suffix to be used with _Float128
  57    types, if __HAVE_FLOAT128 is 1. */
  58 # if __HAVE_FLOAT128
  59 #  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
  60 /* The literal suffix f128 exists only since GCC 7.0.  */
  61 #   define __f128(x) x##q
  62 #  else
  63 #   define __f128(x) x##f128
  64 #  endif
  65 # endif
  66
  67 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1.  */
  68 # if __HAVE_FLOAT128
  69 #  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
  70 /* Add a typedef for older GCC compilers which don't natively support
  71    _Complex _Float128.  */
  72 typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__TC__)));
  73 #   define __CFLOAT128 __cfloat128
  74 #  else
  75 #   define __CFLOAT128 _Complex _Float128
  76 #  endif
  77 # endif
  78
  79 /* The remaining of this file provides support for older compilers.  */
  80 # if __HAVE_FLOAT128
  81
  82 /* The type _Float128 exists only since GCC 7.0.  */
  83 #  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
  84 typedef __float128 _Float128;
  85 #  endif
  86
  87 /* __builtin_huge_valf128 doesn't exist before GCC 7.0.  */
  88 #  if !__GNUC_PREREQ (7, 0)
  89 #   define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
  90 #  endif
  91
  92 /* Older GCC has only a subset of built-in functions for _Float128 on
  93    ia64, and __builtin_infq is not usable in static initializers.
  94    Converting a narrower sNaN to _Float128 produces a quiet NaN, so
  95    attempts to use _Float128 sNaNs will not work properly with older
  96    compilers.  */
  97 #  if !__GNUC_PREREQ (7, 0)
  98 #   define __builtin_copysignf128 __builtin_copysignq
  99 #   define __builtin_fabsf128 __builtin_fabsq
 100 #   define __builtin_inff128() ((_Float128) __builtin_inf ())
 101 #   define __builtin_nanf128(x) ((_Float128) __builtin_nan (x))
 102 #   define __builtin_nansf128(x) ((_Float128) __builtin_nans (x))
 103 #  endif
 104
 105 /* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*,
 106    e.g.: __builtin_signbitf128, before GCC 6.  However, there has never
 107    been a __builtin_signbitf128 in GCC and the type-generic builtin is
 108    only available since GCC 6.  */
 109 #  if !__GNUC_PREREQ (6, 0)
 110 #   define __builtin_signbitf128 __signbitf128
 111 #  endif
 112
 113 # endif
 114
 115 #endif /* !__ASSEMBLER__.  */
 116
 117 #include <bits/floatn-common.h>
 118
 119 #endif /* _BITS_FLOATN_H */