1 | //===-- addvsi3.c - Implement __addvsi3 -----------------------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file implements __addvsi3 for the compiler_rt library. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #include "int_lib.h" |
14 | |
15 | // Returns: a + b |
16 | |
17 | // Effects: aborts if a + b overflows |
18 | |
19 | COMPILER_RT_ABI si_int __addvsi3(si_int a, si_int b) { |
20 | si_int s = (su_int)a + (su_int)b; |
21 | if (b >= 0) { |
22 | if (s < a) |
23 | compilerrt_abort(); |
24 | } else { |
25 | if (s >= a) |
26 | compilerrt_abort(); |
27 | } |
28 | return s; |
29 | } |
30 | |