4684ddb6aa
- import libcxx - reduce targets to the one when compiled as a tools Change-Id: Iabb8427f80ff8e89463559a28bcb8b4f2bdbc496
30 lines
811 B
C
30 lines
811 B
C
/* ===-- 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;
|
|
}
|