28 lines
724 B
C
28 lines
724 B
C
/* ===-- paritysi2.c - Implement __paritysi2 -------------------------------===
|
|
*
|
|
* The LLVM Compiler Infrastructure
|
|
*
|
|
* This file is distributed under the University of Illinois Open Source
|
|
* License. See LICENSE.TXT for details.
|
|
*
|
|
* ===----------------------------------------------------------------------===
|
|
*
|
|
* This file implements __paritysi2 for the compiler_rt library.
|
|
*
|
|
* ===----------------------------------------------------------------------===
|
|
*/
|
|
|
|
#include "int_lib.h"
|
|
|
|
/* Returns: 1 if number of bits is odd else returns 0 */
|
|
|
|
si_int
|
|
__paritysi2(si_int a)
|
|
{
|
|
su_int x = (su_int)a;
|
|
x ^= x >> 16;
|
|
x ^= x >> 8;
|
|
x ^= x >> 4;
|
|
return (0x6996 >> (x & 0xF)) & 1;
|
|
}
|