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
23COMPILER_RT_ABI ti_int
24__addvti3(ti_int a, ti_int b)
25{
26 ti_int s = (tu_int) a + (tu_int) 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