| 1 | //===-- Definition of float128 type ---------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef LLVM_LIBC_TYPES_FLOAT128_H |
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| 10 | #define LLVM_LIBC_TYPES_FLOAT128_H |
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| 11 | |
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| 12 | #include "../llvm-libc-macros/float-macros.h" // LDBL_MANT_DIG |
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| 13 | |
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| 14 | // Currently, C23 `_Float128` type is only defined as a built-in type in GCC 7 |
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| 15 | // or later, and only for C. For C++, or for clang, `__float128` is defined |
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| 16 | // instead, and only on x86-64 targets. |
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| 17 | // |
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| 18 | // TODO: Update C23 `_Float128` type detection again when clang supports it. |
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| 19 | // https://github.com/llvm/llvm-project/issues/80195 |
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| 20 | #if defined(__STDC_IEC_60559_BFP__) && !defined(__clang__) && \ |
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| 21 | !defined(__cplusplus) |
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| 22 | #define LIBC_TYPES_HAS_FLOAT128 |
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| 23 | typedef _Float128 float128; |
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| 24 | #elif defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__) |
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| 25 | // Use __float128 type. gcc and clang sometime use __SIZEOF_FLOAT128__ to |
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| 26 | // notify the availability of __float128. |
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| 27 | // clang also uses __FLOAT128__ macro to notify the availability of __float128 |
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| 28 | // type: https://reviews.llvm.org/D15120 |
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| 29 | #define LIBC_TYPES_HAS_FLOAT128 |
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| 30 | typedef __float128 float128; |
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| 31 | #elif (LDBL_MANT_DIG == 113) |
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| 32 | #define LIBC_TYPES_HAS_FLOAT128 |
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| 33 | typedef long double float128; |
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| 34 | #endif |
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| 35 | |
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| 36 | #endif // LLVM_LIBC_TYPES_FLOAT128_H |
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| 37 | |
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