13cab2bb3Spatrick //===-- paritydi2.c - Implement __paritydi2 -------------------------------===// 23cab2bb3Spatrick // 33cab2bb3Spatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 43cab2bb3Spatrick // See https://llvm.org/LICENSE.txt for license information. 53cab2bb3Spatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 63cab2bb3Spatrick // 73cab2bb3Spatrick //===----------------------------------------------------------------------===// 83cab2bb3Spatrick // 93cab2bb3Spatrick // This file implements __paritydi2 for the compiler_rt library. 103cab2bb3Spatrick // 113cab2bb3Spatrick //===----------------------------------------------------------------------===// 123cab2bb3Spatrick 133cab2bb3Spatrick #include "int_lib.h" 143cab2bb3Spatrick 153cab2bb3Spatrick // Returns: 1 if number of bits is odd else returns 0 163cab2bb3Spatrick __paritydi2(di_int a)171f9cb04fSpatrickCOMPILER_RT_ABI int __paritydi2(di_int a) { 183cab2bb3Spatrick dwords x; 193cab2bb3Spatrick x.all = a; 20*d89ec533Spatrick su_int x2 = x.s.high ^ x.s.low; 21*d89ec533Spatrick x2 ^= x2 >> 16; 22*d89ec533Spatrick x2 ^= x2 >> 8; 23*d89ec533Spatrick x2 ^= x2 >> 4; 24*d89ec533Spatrick return (0x6996 >> (x2 & 0xF)) & 1; 253cab2bb3Spatrick } 26