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