1/* ===-- negvsi2.c - Implement __negvsi2 -----------------------------------===
2 *
3 *                     The LLVM Compiler Infrastructure
4 *
5 * This file is distributed under the University of Illinois Open Source
6 * License. See LICENSE.TXT for details.
7 *
8 * ===----------------------------------------------------------------------===
9 *
10 * This file implements __negvsi2 for the compiler_rt library.
11 *
12 * ===----------------------------------------------------------------------===
13 */
14
15#include "int_lib.h"
16#include <stdlib.h>
17
18/* Returns: -a */
19
20/* Effects: aborts if -a overflows */
21
22si_int
23__negvsi2(si_int a)
24{
25    const si_int MIN = (si_int)1 << ((int)(sizeof(si_int) * CHAR_BIT)-1);
26    if (a == MIN)
27        abort();
28    return -a;
29}
30