1 //===-- Definition of float128 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_FLOAT128_H 10 #define LLVM_LIBC_TYPES_FLOAT128_H 11 12 #include "../llvm-libc-macros/float-macros.h" // LDBL_MANT_DIG 13 14 // Currently, C23 `_Float128` type is only defined as a built-in type in GCC 7 15 // or later, and only for C. For C++, or for clang, `__float128` is defined 16 // instead, and only on x86-64 targets. 17 // 18 // TODO: Update C23 `_Float128` type detection again when clang supports it. 19 // https://github.com/llvm/llvm-project/issues/80195 20 #if defined(__STDC_IEC_60559_BFP__) && !defined(__clang__) && \ 21 !defined(__cplusplus) 22 #define LIBC_TYPES_HAS_FLOAT128 23 typedef _Float128 float128; 24 #elif defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__) 25 // Use __float128 type. gcc and clang sometime use __SIZEOF_FLOAT128__ to 26 // notify the availability of __float128. 27 // clang also uses __FLOAT128__ macro to notify the availability of __float128 28 // type: https://reviews.llvm.org/D15120 29 #define LIBC_TYPES_HAS_FLOAT128 30 typedef __float128 float128; 31 #elif (LDBL_MANT_DIG == 113) 32 #define LIBC_TYPES_HAS_FLOAT128 33 typedef long double float128; 34 #endif 35 36 #endif // LLVM_LIBC_TYPES_FLOAT128_H 37