blob: 4812af81598218170c2ec090132752192bbd39e9 (
plain)
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
|
/* ===-- absvsi2.c - Implement __absvsi2 -----------------------------------===
*
* 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 __absvsi2 for the compiler_rt library.
*
* ===----------------------------------------------------------------------===
*/
#include "int_lib.h"
/* Returns: absolute value */
/* Effects: aborts if abs(x) < 0 */
COMPILER_RT_ABI si_int
__absvsi2(si_int a)
{
const int N = (int)(sizeof(si_int) * CHAR_BIT);
if (a == (1 << (N-1)))
compilerrt_abort();
const si_int t = a >> (N - 1);
return (a ^ t) - t;
}
|
