parityti2_test.c revision 1.1.1.3
1//===-- parityti2_test.c - Test __parityti2 -------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file tests __parityti2 for the compiler_rt library. 11// 12//===----------------------------------------------------------------------===// 13 14#include "int_lib.h" 15#include <stdio.h> 16#include <stdlib.h> 17 18#ifdef CRT_HAS_128BIT 19 20// Returns: 1 if number of bits is odd else returns 0 21 22COMPILER_RT_ABI si_int __parityti2(ti_int a); 23 24int naive_parity(ti_int a) 25{ 26 int r = 0; 27 for (; a; a = a & (a - 1)) 28 r = ~r; 29 return r & 1; 30} 31 32int test__parityti2(ti_int a) 33{ 34 si_int x = __parityti2(a); 35 si_int expected = naive_parity(a); 36 if (x != expected) 37 { 38 twords at; 39 at.all = a; 40 printf("error in __parityti2(0x%.16llX%.16llX) = %d, expected %d\n", 41 at.s.high, at.s.low, x, expected); 42 } 43 return x != expected; 44} 45 46char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0}; 47char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0}; 48 49#endif 50 51int main() 52{ 53#ifdef CRT_HAS_128BIT 54 int i; 55 for (i = 0; i < 10000; ++i) 56 if (test__parityti2(((ti_int)rand() << 96) + ((ti_int)rand() << 64) + 57 ((ti_int)rand() << 32) + rand())) 58 return 1; 59 60#else 61 printf("skipped\n"); 62#endif 63 return 0; 64} 65