1276789Sdim/* ===-- paritysi2.c - Implement __paritysi2 -------------------------------===
2276789Sdim *
3276789Sdim *                     The LLVM Compiler Infrastructure
4276789Sdim *
5276789Sdim * This file is dual licensed under the MIT and the University of Illinois Open
6276789Sdim * Source Licenses. See LICENSE.TXT for details.
7276789Sdim *
8276789Sdim * ===----------------------------------------------------------------------===
9276789Sdim *
10276789Sdim * This file implements __paritysi2 for the compiler_rt library.
11276789Sdim *
12276789Sdim * ===----------------------------------------------------------------------===
13276789Sdim */
14276789Sdim
15276789Sdim#include "int_lib.h"
16276789Sdim
17276789Sdim/* Returns: 1 if number of bits is odd else returns 0 */
18276789Sdim
19276789SdimCOMPILER_RT_ABI si_int
20276789Sdim__paritysi2(si_int a)
21276789Sdim{
22276789Sdim    su_int x = (su_int)a;
23276789Sdim    x ^= x >> 16;
24276789Sdim    x ^= x >> 8;
25276789Sdim    x ^= x >> 4;
26276789Sdim    return (0x6996 >> (x & 0xF)) & 1;
27276789Sdim}
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