30 lines · c
1//===-- addvdi3.c - Implement __addvdi3 -----------------------------------===//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// This file implements __addvdi3 for the compiler_rt library.10//11//===----------------------------------------------------------------------===//12 13#include "int_lib.h"14 15// Returns: a + b16 17// Effects: aborts if a + b overflows18 19COMPILER_RT_ABI di_int __addvdi3(di_int a, di_int b) {20 di_int s = (du_int)a + (du_int)b;21 if (b >= 0) {22 if (s < a)23 compilerrt_abort();24 } else {25 if (s >= a)26 compilerrt_abort();27 }28 return s;29}30