1 | /*===-- negvti2.c - Implement __negvti2 -----------------------------------=== |
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 __negvti2 for the compiler_rt library. |
11 | * |
12 | *===----------------------------------------------------------------------=== |
13 | */ |
14 | |
15 | #include "int_lib.h" |
16 | |
17 | #ifdef CRT_HAS_128BIT |
18 | |
19 | /* Returns: -a */ |
20 | |
21 | /* Effects: aborts if -a overflows */ |
22 | |
23 | COMPILER_RT_ABI ti_int |
24 | __negvti2(ti_int a) |
25 | { |
26 | const ti_int MIN = (ti_int)1 << ((int)(sizeof(ti_int) * CHAR_BIT)-1); |
27 | if (a == MIN) |
28 | compilerrt_abort(); |
29 | return -a; |
30 | } |
31 | |
32 | #endif /* CRT_HAS_128BIT */ |
33 | |