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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
__negvti2(ti_int a)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