libc/include/llvm-libc-types/cfloat128.h

   1 //===-- Definition of cfloat128 type --------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_LIBC_TYPES_CFLOAT128_H
  10 #define LLVM_LIBC_TYPES_CFLOAT128_H
  11
  12 #include "../llvm-libc-macros/float-macros.h" // LDBL_MANT_DIG
  13
  14 // Currently, the complex variant of C23 `_Float128` type is only defined as a
  15 // built-in type in GCC 7 or later, for C and in GCC 13 or later, for C++. For
  16 // clang, the complex variant of `__float128` is defined instead, and only on
  17 // x86-64 targets for clang 11 or later.
  18 //
  19 // TODO: Update the complex variant of C23 `_Float128` type detection again when
  20 // clang supports it.
  21 #if defined(__STDC_IEC_60559_COMPLEX__) && !defined(__clang__)
  22 #if !defined(__cplusplus)
  23 #define LIBC_TYPES_HAS_CFLOAT128
  24 typedef _Complex _Float128 cfloat128;
  25 #elif defined(__GNUC__) && __GNUC__ >= 13
  26 #define LIBC_TYPES_HAS_CFLOAT128
  27 typedef _Complex _Float128 cfloat128;
  28 #endif
  29 #elif __clang_major__ >= 11 &&                                                 \
  30     (defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__))
  31 // Use _Complex __float128 type. clang uses __SIZEOF_FLOAT128__ or __FLOAT128__
  32 // macro to notify the availability of __float128 type:
  33 // https://reviews.llvm.org/D15120
  34 #define LIBC_TYPES_HAS_CFLOAT128
  35 typedef _Complex __float128 cfloat128;
  36 #elif (LDBL_MANT_DIG == 113)
  37 #define LIBC_TYPES_HAS_CFLOAT128
  38 typedef _Complex long double cfloat128;
  39 #endif
  40
  41 #endif // LLVM_LIBC_TYPES_CFLOAT128_H