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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIBC_MACROS_STDCKDINT_MACROS_H10#define LLVM_LIBC_MACROS_STDCKDINT_MACROS_H11 12// We need to use __builtin_*_overflow from GCC/Clang to implement the overflow13// macros. Check __GNUC__ or __clang__ for availability of such builtins.14// Note that clang-cl defines __clang__ only and does not define __GNUC__ so we15// have to check for both.16#if defined(__GNUC__) || defined(__clang__)17// clang/gcc overlay may provides similar macros, we need to avoid redefining18// them.19#ifndef __STDC_VERSION_STDCKDINT_H__20#define __STDC_VERSION_STDCKDINT_H__ 202311L21 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_H28