1// RUN: %clang_builtins %s %librt -o %t && %run %t 2//===-- paritysi2_test.c - Test __paritysi2 -------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9// 10// This file tests __paritysi2 for the compiler_rt library. 11// 12//===----------------------------------------------------------------------===// 13 14#include "int_lib.h" 15#include <stdio.h> 16#include <stdlib.h> 17 18// Returns: 1 if number of bits is odd else returns 0 19 20COMPILER_RT_ABI si_int __paritysi2(si_int a); 21 22int naive_parity(si_int a) 23{ 24 int r = 0; 25 for (; a; a = a & (a - 1)) 26 r = ~r; 27 return r & 1; 28} 29 30int test__paritysi2(si_int a) 31{ 32 si_int x = __paritysi2(a); 33 si_int expected = naive_parity(a); 34 if (x != expected) 35 printf("error in __paritysi2(0x%X) = %d, expected %d\n", 36 a, x, expected); 37 return x != expected; 38} 39 40char assumption_2[sizeof(si_int)*CHAR_BIT == 32] = {0}; 41 42int main() 43{ 44 int i; 45 for (i = 0; i < 10000; ++i) 46 if (test__paritysi2(rand())) 47 return 1; 48 49 return 0; 50} 51