1//===-- paritydi2.c - Implement __paritydi2 -------------------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file implements __paritydi2 for the compiler_rt library. 10// 11//===----------------------------------------------------------------------===// 12 13#include "int_lib.h" 14 15// Returns: 1 if number of bits is odd else returns 0 16 17COMPILER_RT_ABI int __paritydi2(di_int a) { 18 dwords x; 19 x.all = a; 20 su_int x2 = x.s.high ^ x.s.low; 21 x2 ^= x2 >> 16; 22 x2 ^= x2 >> 8; 23 x2 ^= x2 >> 4; 24 return (0x6996 >> (x2 & 0xF)) & 1; 25} 26