| 1 | //===-- Definition of macros for stdckdint.h ------------------------------===// |
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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_MACROS_STDCKDINT_MACROS_H |
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| 10 | #define LLVM_LIBC_MACROS_STDCKDINT_MACROS_H |
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| 11 | |
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| 12 | // We need to use __builtin_*_overflow from GCC/Clang to implement the overflow |
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| 13 | // macros. Check __GNUC__ for availability of such builtins. |
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| 14 | #ifdef __GNUC__ |
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| 15 | // clang/gcc overlay may provides similar macros, we need to avoid redefining |
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| 16 | // them. |
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| 17 | #ifndef __STDC_VERSION_STDCKDINT_H__ |
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| 18 | #define __STDC_VERSION_STDCKDINT_H__ 202311L |
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| 19 | |
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| 20 | #define ckd_add(R, A, B) __builtin_add_overflow((A), (B), (R)) |
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| 21 | #define ckd_sub(R, A, B) __builtin_sub_overflow((A), (B), (R)) |
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| 22 | #define ckd_mul(R, A, B) __builtin_mul_overflow((A), (B), (R)) |
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| 23 | #endif // __STDC_VERSION_STDCKDINT_H__ |
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| 24 | #endif // __GNUC__ |
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| 25 | #endif // LLVM_LIBC_MACROS_STDCKDINT_MACROS_H |
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| 26 | |
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