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} 28