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 
22 COMPILER_RT_ABI si_int __parityti2(ti_int a);
23 
naive_parity(ti_int a)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 
test__parityti2(ti_int a)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 
main()51 int 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