1214152Sed/* ===-- paritysi2.c - Implement __paritysi2 -------------------------------===
2214152Sed *
3214152Sed *                     The LLVM Compiler Infrastructure
4214152Sed *
5222656Sed * This file is dual licensed under the MIT and the University of Illinois Open
6222656Sed * Source Licenses. See LICENSE.TXT for details.
7214152Sed *
8214152Sed * ===----------------------------------------------------------------------===
9214152Sed *
10214152Sed * This file implements __paritysi2 for the compiler_rt library.
11214152Sed *
12214152Sed * ===----------------------------------------------------------------------===
13214152Sed */
14214152Sed
15214152Sed#include "int_lib.h"
16214152Sed
17214152Sed/* Returns: 1 if number of bits is odd else returns 0 */
18214152Sed
19222656SedCOMPILER_RT_ABI si_int
20214152Sed__paritysi2(si_int a)
21214152Sed{
22214152Sed    su_int x = (su_int)a;
23214152Sed    x ^= x >> 16;
24214152Sed    x ^= x >> 8;
25214152Sed    x ^= x >> 4;
26214152Sed    return (0x6996 >> (x & 0xF)) & 1;
27214152Sed}
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