1//===-- addvti3.c - Implement __addvti3 -----------------------------------===// 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// This file implements __addvti3 for the compiler_rt library. 10// 11//===----------------------------------------------------------------------===// 12 13#include "int_lib.h" 14 15#ifdef CRT_HAS_128BIT 16 17// Returns: a + b 18 19// Effects: aborts if a + b overflows 20 21COMPILER_RT_ABI ti_int __addvti3(ti_int a, ti_int b) { 22 ti_int s = (tu_int)a + (tu_int)b; 23 if (b >= 0) { 24 if (s < a) 25 compilerrt_abort(); 26 } else { 27 if (s >= a) 28 compilerrt_abort(); 29 } 30 return s; 31} 32 33#endif // CRT_HAS_128BIT 34