derek.holloway
7502bf64a4
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42 lines
1.6 KiB
C
42 lines
1.6 KiB
C
//===-- Detection of _Complex _Float128 compiler builtin type -------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIBC_MACROS_CFLOAT128_MACROS_H
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#define LLVM_LIBC_MACROS_CFLOAT128_MACROS_H
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#include "float-macros.h" // LDBL_MANT_DIG
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// Currently, the complex variant of C23 `_Float128` type is only defined as a
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// built-in type in GCC 7 or later, for C and in GCC 13 or later, for C++. For
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// clang, the complex variant of `__float128` is defined instead, and only on
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// x86-64 targets for clang 11 or later.
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//
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// TODO: Update the complex variant of C23 `_Float128` type detection again when
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// clang supports it.
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#ifdef __clang__
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#if (__clang_major__ >= 11) && \
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(defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__))
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// Use _Complex __float128 type. clang uses __SIZEOF_FLOAT128__ or __FLOAT128__
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// macro to notify the availability of __float128 type:
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// https://reviews.llvm.org/D15120
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#define LIBC_TYPES_HAS_CFLOAT128
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#endif
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#elif defined(__GNUC__)
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#if (defined(__STDC_IEC_60559_COMPLEX__) && defined(__SIZEOF_FLOAT128__)) && \
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(__GNUC__ >= 13 || (!defined(__cplusplus)))
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#define LIBC_TYPES_HAS_CFLOAT128
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#endif
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#endif
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#if !defined(LIBC_TYPES_HAS_CFLOAT128) && (LDBL_MANT_DIG == 113)
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#define LIBC_TYPES_HAS_CFLOAT128
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#define LIBC_TYPES_CFLOAT128_IS_COMPLEX_LONG_DOUBLE
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#endif
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#endif // LLVM_LIBC_MACROS_CFLOAT128_MACROS_H
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