1276789Sdim/* ===-- addvti3.c - Implement __addvti3 -----------------------------------===
2276789Sdim *
3276789Sdim *                     The LLVM Compiler Infrastructure
4276789Sdim *
5276789Sdim * This file is dual licensed under the MIT and the University of Illinois Open
6276789Sdim * Source Licenses. See LICENSE.TXT for details.
7276789Sdim *
8276789Sdim * ===----------------------------------------------------------------------===
9276789Sdim *
10276789Sdim * This file implements __addvti3 for the compiler_rt library.
11276789Sdim *
12276789Sdim * ===----------------------------------------------------------------------===
13276789Sdim */
14276789Sdim
15276789Sdim#include "int_lib.h"
16276789Sdim
17276789Sdim#ifdef CRT_HAS_128BIT
18276789Sdim
19276789Sdim/* Returns: a + b */
20276789Sdim
21276789Sdim/* Effects: aborts if a + b overflows */
22276789Sdim
23276789SdimCOMPILER_RT_ABI ti_int
24276789Sdim__addvti3(ti_int a, ti_int b)
25276789Sdim{
26276789Sdim    ti_int s = (tu_int) a + (tu_int) b;
27276789Sdim    if (b >= 0)
28276789Sdim    {
29276789Sdim        if (s < a)
30276789Sdim            compilerrt_abort();
31276789Sdim    }
32276789Sdim    else
33276789Sdim    {
34276789Sdim        if (s >= a)
35276789Sdim            compilerrt_abort();
36276789Sdim    }
37276789Sdim    return s;
38276789Sdim}
39276789Sdim
40276789Sdim#endif /* CRT_HAS_128BIT */
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