1/* ===-- absvti2.c - Implement __absvdi2 -----------------------------------===
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 __absvti2 for the compiler_rt library.
11 *
12 * ===----------------------------------------------------------------------===
13 */
14
15#if __x86_64
16
17#include "int_lib.h"
18#include <stdlib.h>
19
20/* Returns: absolute value */
21
22/* Effects: aborts if abs(x) < 0 */
23
24ti_int
25__absvti2(ti_int a)
26{
27    const int N = (int)(sizeof(ti_int) * CHAR_BIT);
28    if (a == ((ti_int)1 << (N-1)))
29        abort();
30    const ti_int s = a >> (N - 1);
31    return (a ^ s) - s;
32}
33
34#endif
35