1//===-- parityti2.c - Implement __parityti2 -------------------------------===// 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 __parityti2 for the compiler_rt library. 10// 11//===----------------------------------------------------------------------===// 12 13#include "int_lib.h" 14 15#ifdef CRT_HAS_128BIT 16 17// Returns: 1 if number of bits is odd else returns 0 18 19COMPILER_RT_ABI int __parityti2(ti_int a) { 20 twords x; 21 dwords x2; 22 x.all = a; 23 x2.all = x.s.high ^ x.s.low; 24 su_int x3 = x2.s.high ^ x2.s.low; 25 x3 ^= x3 >> 16; 26 x3 ^= x3 >> 8; 27 x3 ^= x3 >> 4; 28 return (0x6996 >> (x3 & 0xF)) & 1; 29} 30 31#endif // CRT_HAS_128BIT 32