aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/cxxsupp/builtins/negvti2.c
blob: c5bf2aea2be50a05b64cb68ed9e973d6ce1bc386 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
/*===-- negvti2.c - Implement __negvti2 -----------------------------------=== 
 * 
 *                     The LLVM Compiler Infrastructure 
 * 
 * This file is dual licensed under the MIT and the University of Illinois Open 
 * Source Licenses. See LICENSE.TXT for details. 
 * 
 *===----------------------------------------------------------------------=== 
 * 
 *This file implements __negvti2 for the compiler_rt library. 
 * 
 *===----------------------------------------------------------------------=== 
 */ 
 
#include "int_lib.h" 
 
#ifdef CRT_HAS_128BIT 
 
/* Returns: -a */ 
 
/* Effects: aborts if -a overflows */ 
 
COMPILER_RT_ABI ti_int 
__negvti2(ti_int a) 
{ 
    const ti_int MIN = (ti_int)1 << ((int)(sizeof(ti_int) * CHAR_BIT)-1); 
    if (a == MIN) 
        compilerrt_abort(); 
    return -a; 
} 
 
#endif /* CRT_HAS_128BIT */