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 |
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 | |