Daniel Dunbar | b3a6901 | 2009-06-26 16:47:03 +0000 | [diff] [blame] | 1 | //===-- parityti2_test.c - Test __parityti2 -------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Howard Hinnant | 9ad441f | 2010-11-16 22:13:33 +0000 | [diff] [blame] | 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
Daniel Dunbar | b3a6901 | 2009-06-26 16:47:03 +0000 | [diff] [blame] | 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", |
Daniel Dunbar | cff5248 | 2009-10-27 17:49:07 +0000 | [diff] [blame] | 41 | at.s.high, at.s.low, x, expected); |
Daniel Dunbar | b3a6901 | 2009-06-26 16:47:03 +0000 | [diff] [blame] | 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 | |
Joerg Sonnenberger | 7482815 | 2011-05-29 21:43:29 +0000 | [diff] [blame] | 60 | #else |
| 61 | printf("skipped\n"); |
Daniel Dunbar | b3a6901 | 2009-06-26 16:47:03 +0000 | [diff] [blame] | 62 | #endif |
| 63 | return 0; |
| 64 | } |