1  /* Macros to control TS 18661-3 glibc features on ia64.
       2     Copyright (C) 2017-2023 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     <https://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 && !__GNUC_PREREQ (13, 0))
      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 && !__GNUC_PREREQ (13, 0))
      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 && !__GNUC_PREREQ (13, 0))
      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 */