| // RUN: %clang_builtins %s %librt -o %t && %run %t |
| // REQUIRES: librt_has_paritysi2 |
| |
| #include "int_lib.h" |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| // Returns: 1 if number of bits is odd else returns 0 |
| |
| COMPILER_RT_ABI int __paritysi2(si_int a); |
| |
| int naive_parity(si_int a) |
| { |
| int r = 0; |
| for (; a; a = a & (a - 1)) |
| r = ~r; |
| return r & 1; |
| } |
| |
| int test__paritysi2(si_int a) |
| { |
| si_int x = __paritysi2(a); |
| si_int expected = naive_parity(a); |
| if (x != expected) |
| printf("error in __paritysi2(0x%X) = %d, expected %d\n", |
| a, x, expected); |
| return x != expected; |
| } |
| |
| char assumption_2[sizeof(si_int)*CHAR_BIT == 32] = {0}; |
| |
| int main() |
| { |
| int i; |
| for (i = 0; i < 10000; ++i) |
| if (test__paritysi2(rand())) |
| return 1; |
| |
| return 0; |
| } |