1 | //===-- negvti2.c - Implement __negvti2 -----------------------------------===// |
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 __negvti2 for the compiler_rt library. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #include "int_lib.h" |
14 | |
15 | #ifdef CRT_HAS_128BIT |
16 | |
17 | // Returns: -a |
18 | |
19 | // Effects: aborts if -a overflows |
20 | |
21 | COMPILER_RT_ABI ti_int __negvti2(ti_int a) { |
22 | const ti_int MIN = (tu_int)1 << ((int)(sizeof(ti_int) * CHAR_BIT) - 1); |
23 | if (a == MIN) |
24 | compilerrt_abort(); |
25 | return -a; |
26 | } |
27 | |
28 | #endif // CRT_HAS_128BIT |
29 | |