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-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements __addvdi3 for the compiler_rt library.
10//
11//===----------------------------------------------------------------------===//
12
13#include "int_lib.h"
14
15// Returns: a + b
16
17// Effects: aborts if a + b overflows
18
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