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 #if __x86_64 15 16 #include "int_lib.h" 17 #include <stdio.h> 18 #include <stdlib.h> 19 20 // Returns: 1 if number of bits is odd else returns 0 21 22 si_int __parityti2(ti_int a); 23 24 int 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 32 int 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 46 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0}; 47 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0}; 48 49 #endif 50 51 int main() 52 { 53 #if __x86_64 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
