1214152Sed/* ===-- addvti3.c - Implement __addvti3 -----------------------------------===
2214152Sed *
3214152Sed *                     The LLVM Compiler Infrastructure
4214152Sed *
5222656Sed * This file is dual licensed under the MIT and the University of Illinois Open
6222656Sed * Source Licenses. See LICENSE.TXT for details.
7214152Sed *
8214152Sed * ===----------------------------------------------------------------------===
9214152Sed *
10214152Sed * This file implements __addvti3 for the compiler_rt library.
11214152Sed *
12214152Sed * ===----------------------------------------------------------------------===
13214152Sed */
14214152Sed
15239138Sandrew#include "int_lib.h"
16239138Sandrew
17263763Sdim#ifdef CRT_HAS_128BIT
18214152Sed
19214152Sed/* Returns: a + b */
20214152Sed
21214152Sed/* Effects: aborts if a + b overflows */
22214152Sed
23214152Sedti_int
24214152Sed__addvti3(ti_int a, ti_int b)
25214152Sed{
26214152Sed    ti_int s = a + b;
27214152Sed    if (b >= 0)
28214152Sed    {
29214152Sed        if (s < a)
30214152Sed            compilerrt_abort();
31214152Sed    }
32214152Sed    else
33214152Sed    {
34214152Sed        if (s >= a)
35214152Sed            compilerrt_abort();
36214152Sed    }
37214152Sed    return s;
38214152Sed}
39214152Sed
40263763Sdim#endif /* CRT_HAS_128BIT */
41