1 /* ===-- addvti3.c - Implement __addvti3 -----------------------------------===
2  *
3  *                     The LLVM Compiler Infrastructure
4  *
5  * This file is dual licensed under the MIT and the University of Illinois Open
6  * Source Licenses. See LICENSE.TXT for details.
7  *
8  * ===----------------------------------------------------------------------===
9  *
10  * This file implements __addvti3 for the compiler_rt library.
11  *
12  * ===----------------------------------------------------------------------===
13  */
14 
15 #include "int_lib.h"
16 
17 #ifdef CRT_HAS_128BIT
18 
19 /* Returns: a + b */
20 
21 /* Effects: aborts if a + b overflows */
22 
23 COMPILER_RT_ABI ti_int
__addvti3(ti_int a,ti_int b)24 __addvti3(ti_int a, ti_int b)
25 {
26     ti_int s = a + b;
27     if (b >= 0)
28     {
29         if (s < a)
30             compilerrt_abort();
31     }
32     else
33     {
34         if (s >= a)
35             compilerrt_abort();
36     }
37     return s;
38 }
39 
40 #endif /* CRT_HAS_128BIT */
41