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1//===-- paritysi2.c - Implement __paritysi2 -------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8//9// This file implements __paritysi2 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 016 17COMPILER_RT_ABI int __paritysi2(si_int a) {18 su_int x = (su_int)a;19 x ^= x >> 16;20 x ^= x >> 8;21 x ^= x >> 4;22 return (0x6996 >> (x & 0xF)) & 1;23}24