1// RUN: %clang_builtins %s %librt -o %t && %run %t 2// REQUIRES: int128 3//===-- parityti2_test.c - Test __parityti2 -------------------------------===// 4// 5// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 6// See https://llvm.org/LICENSE.txt for license information. 7// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 8// 9//===----------------------------------------------------------------------===// 10// 11// This file tests __parityti2 for the compiler_rt library. 12// 13//===----------------------------------------------------------------------===// 14 15#include "int_lib.h" 16#include <stdio.h> 17#include <stdlib.h> 18 19#ifdef CRT_HAS_128BIT 20 21// Returns: 1 if number of bits is odd else returns 0 22 23COMPILER_RT_ABI si_int __parityti2(ti_int a); 24 25int naive_parity(ti_int a) 26{ 27 int r = 0; 28 for (; a; a = a & (a - 1)) 29 r = ~r; 30 return r & 1; 31} 32 33int test__parityti2(ti_int a) 34{ 35 si_int x = __parityti2(a); 36 si_int expected = naive_parity(a); 37 if (x != expected) 38 { 39 twords at; 40 at.all = a; 41 printf("error in __parityti2(0x%.16llX%.16llX) = %d, expected %d\n", 42 at.s.high, at.s.low, x, expected); 43 } 44 return x != expected; 45} 46 47char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0}; 48char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0}; 49 50#endif 51 52int main() 53{ 54#ifdef CRT_HAS_128BIT 55 int i; 56 for (i = 0; i < 10000; ++i) 57 if (test__parityti2(((ti_int)rand() << 96) + ((ti_int)rand() << 64) + 58 ((ti_int)rand() << 32) + rand())) 59 return 1; 60 61#else 62 printf("skipped\n"); 63#endif 64 return 0; 65} 66