1 | //===-- negvsi2.c - Implement __negvsi2 -----------------------------------===// |
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 __negvsi2 for the compiler_rt library. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #include "int_lib.h" |
14 | |
15 | // Returns: -a |
16 | |
17 | // Effects: aborts if -a overflows |
18 | |
19 | COMPILER_RT_ABI si_int __negvsi2(si_int a) { |
20 | const si_int MIN = |
21 | (si_int)((su_int)1 << ((int)(sizeof(si_int) * CHAR_BIT) - 1)); |
22 | if (a == MIN) |
23 | compilerrt_abort(); |
24 | return -a; |
25 | } |
26 | |