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} 28