sysdeps/ia64/bits/floatn.h

   1 /* Macros to control TS 18661-3 glibc features on ia64.
   2    Copyright (C) 2017 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 concatenate the literal suffix to be used with _Float128
  44    types, if __HAVE_FLOAT128 is 1. */
  45 #if __HAVE_FLOAT128
  46 # if !__GNUC_PREREQ (7, 0) || defined __cplusplus
  47 /* The literal suffix f128 exists only since GCC 7.0.  */
  48 #  define __f128(x) x##q
  49 # else
  50 #  define __f128(x) x##f128
  51 # endif
  52 #endif
  53
  54 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1.  */
  55 #if __HAVE_FLOAT128
  56 # if !__GNUC_PREREQ (7, 0) || defined __cplusplus
  57 /* Add a typedef for older GCC compilers which don't natively support
  58    _Complex _Float128.  */
  59 typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__TC__)));
  60 #  define __CFLOAT128 __cfloat128
  61 # else
  62 #  define __CFLOAT128 _Complex _Float128
  63 # endif
  64 #endif
  65
  66 /* The remaining of this file provides support for older compilers.  */
  67 #if __HAVE_FLOAT128
  68
  69 /* The type _Float128 exists only since GCC 7.0.  */
  70 # if !__GNUC_PREREQ (7, 0) || defined __cplusplus
  71 typedef __float128 _Float128;
  72 # endif
  73
  74 /* __builtin_huge_valf128 doesn't exist before GCC 7.0.  */
  75 # if !__GNUC_PREREQ (7, 0)
  76 #  define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
  77 # endif
  78
  79 /* Older GCC has only a subset of built-in functions for _Float128 on
  80    ia64, and __builtin_infq is not usable in static initializers.
  81    Converting a narrower sNaN to _Float128 produces a quiet NaN, so
  82    attempts to use _Float128 sNaNs will not work properly with older
  83    compilers.  */
  84 # if !__GNUC_PREREQ (7, 0)
  85 #  define __builtin_copysignf128 __builtin_copysignq
  86 #  define __builtin_fabsf128 __builtin_fabsq
  87 #  define __builtin_inff128() ((_Float128) __builtin_inf ())
  88 #  define __builtin_nanf128(x) ((_Float128) __builtin_nan (x))
  89 #  define __builtin_nansf128(x) ((_Float128) __builtin_nans (x))
  90 # endif
  91
  92 /* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*,
  93    e.g.: __builtin_signbitf128, before GCC 6.  However, there has never
  94    been a __builtin_signbitf128 in GCC and the type-generic builtin is
  95    only available since GCC 6.  */
  96 # if !__GNUC_PREREQ (6, 0)
  97 #  define __builtin_signbitf128 __signbitf128
  98 # endif
  99
 100 #endif
 101
 102 #include <bits/floatn-common.h>
 103
 104 #endif /* _BITS_FLOATN_H */