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#ifdef __clang__
22#if (__clang_major__ >= 11) && \
23 (defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__))
24// Use _Complex __float128 type. clang uses __SIZEOF_FLOAT128__ or __FLOAT128__
25// macro to notify the availability of __float128 type:
26// https://reviews.llvm.org/D15120
27#define LIBC_TYPES_HAS_CFLOAT128
28typedef _Complex __float128 cfloat128;
29#endif
30#elif defined(__GNUC__)
31#if (defined(__STDC_IEC_60559_COMPLEX__) || defined(__SIZEOF_FLOAT128__)) && \
32 (__GNUC__ >= 13 || (!defined(__cplusplus)))
33#define LIBC_TYPES_HAS_CFLOAT128
34typedef _Complex _Float128 cfloat128;
35#endif
36#endif
37
38#if !defined(LIBC_TYPES_HAS_CFLOAT128) && (LDBL_MANT_DIG == 113)
39#define LIBC_TYPES_HAS_CFLOAT128
40#define LIBC_TYPES_CFLOAT128_IS_COMPLEX_LONG_DOUBLE
41typedef _Complex long double cfloat128;
42#endif
43
44#endif // LLVM_LIBC_TYPES_CFLOAT128_H
45