1*bb722a7dSDimitry Andric //===-- Definition of macros for stdckdint.h ------------------------------===// 2*bb722a7dSDimitry Andric // 3*bb722a7dSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*bb722a7dSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*bb722a7dSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*bb722a7dSDimitry Andric // 7*bb722a7dSDimitry Andric //===----------------------------------------------------------------------===// 8*bb722a7dSDimitry Andric 9*bb722a7dSDimitry Andric #ifndef LLVM_LIBC_MACROS_STDCKDINT_MACROS_H 10*bb722a7dSDimitry Andric #define LLVM_LIBC_MACROS_STDCKDINT_MACROS_H 11*bb722a7dSDimitry Andric 12*bb722a7dSDimitry Andric // We need to use __builtin_*_overflow from GCC/Clang to implement the overflow 13*bb722a7dSDimitry Andric // macros. Check __GNUC__ or __clang__ for availability of such builtins. 14*bb722a7dSDimitry Andric // Note that clang-cl defines __clang__ only and does not define __GNUC__ so we 15*bb722a7dSDimitry Andric // have to check for both. 16*bb722a7dSDimitry Andric #if defined(__GNUC__) || defined(__clang__) 17*bb722a7dSDimitry Andric // clang/gcc overlay may provides similar macros, we need to avoid redefining 18*bb722a7dSDimitry Andric // them. 19*bb722a7dSDimitry Andric #ifndef __STDC_VERSION_STDCKDINT_H__ 20*bb722a7dSDimitry Andric #define __STDC_VERSION_STDCKDINT_H__ 202311L 21*bb722a7dSDimitry Andric 22*bb722a7dSDimitry Andric #define ckd_add(R, A, B) __builtin_add_overflow((A), (B), (R)) 23*bb722a7dSDimitry Andric #define ckd_sub(R, A, B) __builtin_sub_overflow((A), (B), (R)) 24*bb722a7dSDimitry Andric #define ckd_mul(R, A, B) __builtin_mul_overflow((A), (B), (R)) 25*bb722a7dSDimitry Andric #endif // __STDC_VERSION_STDCKDINT_H__ 26*bb722a7dSDimitry Andric #endif // __GNUC__ 27*bb722a7dSDimitry Andric #endif // LLVM_LIBC_MACROS_STDCKDINT_MACROS_H 28