1 //===-- Definition of macros for stdckdint.h ------------------------------===// 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_MACROS_STDCKDINT_MACROS_H 10 #define LLVM_LIBC_MACROS_STDCKDINT_MACROS_H 11 12 // We need to use __builtin_*_overflow from GCC/Clang to implement the overflow 13 // macros. Check __GNUC__ or __clang__ for availability of such builtins. 14 // Note that clang-cl defines __clang__ only and does not define __GNUC__ so we 15 // have to check for both. 16 #if defined(__GNUC__) || defined(__clang__) 17 // clang/gcc overlay may provides similar macros, we need to avoid redefining 18 // them. 19 #ifndef __STDC_VERSION_STDCKDINT_H__ 20 #define __STDC_VERSION_STDCKDINT_H__ 202311L 21 22 #define ckd_add(R, A, B) __builtin_add_overflow((A), (B), (R)) 23 #define ckd_sub(R, A, B) __builtin_sub_overflow((A), (B), (R)) 24 #define ckd_mul(R, A, B) __builtin_mul_overflow((A), (B), (R)) 25 #endif // __STDC_VERSION_STDCKDINT_H__ 26 #endif // __GNUC__ 27 #endif // LLVM_LIBC_MACROS_STDCKDINT_MACROS_H 28