1//===-- addvsi3.c - Implement __addvsi3 -----------------------------------===//
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 __addvsi3 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 si_int __addvsi3(si_int a, si_int b) {
20  si_int s = (su_int)a + (su_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