sysdeps/powerpc/bits/floatn.h

   1 /* Macros to control TS 18661-3 glibc features on powerpc.
   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 glibc
  27    includes corresponding *f128 interfaces for it.  */
  28 #if defined _ARCH_PWR8 && defined __LITTLE_ENDIAN__ && (_CALL_ELF == 2) \
  29     && defined __FLOAT128__ && !defined __NO_LONG_DOUBLE_MATH
  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 __HAVE_FLOAT128
  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 0
  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) exist for powerpc 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__ (__KC__)));
  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 exist for powerpc only since GCC 7.0.  */
  83 #  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
  84 typedef __float128 _Float128;
  85 #  endif
  86
  87 /* Builtin __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 /* The following builtins (suffixed with 'q') are available in GCC >= 6.2,
  93    which is the minimum version required for float128 support on powerpc64le.
  94    Since GCC 7.0 the builtins suffixed with f128 are also available, then
  95    there is no need to redefined them.  */
  96 #  if !__GNUC_PREREQ (7, 0)
  97 #   define __builtin_copysignf128 __builtin_copysignq
  98 #   define __builtin_fabsf128 __builtin_fabsq
  99 #   define __builtin_inff128 __builtin_infq
 100 #   define __builtin_nanf128 __builtin_nanq
 101 #   define __builtin_nansf128 __builtin_nansq
 102 #  endif
 103
 104 /* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*,
 105    e.g.: __builtin_signbitf128, before GCC 6.  However, there has never
 106    been a __builtin_signbitf128 in GCC and the type-generic builtin is
 107    only available since GCC 6.  */
 108 #  if !__GNUC_PREREQ (6, 0)
 109 #   define __builtin_signbitf128 __signbitf128
 110 #  endif
 111
 112 # endif
 113
 114 #endif /* !__ASSEMBLER__.  */
 115
 116 #include <bits/floatn-common.h>
 117
 118 #endif /* _BITS_FLOATN_H */