1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
// RUN: %clang_builtins %s %librt -o %t && %run %t
//===-- paritydi2_test.c - Test __paritydi2 -------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file tests __paritydi2 for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
#include "int_lib.h"
#include <stdio.h>
#include <stdlib.h>
// Returns: 1 if number of bits is odd else returns 0
COMPILER_RT_ABI si_int __paritydi2(di_int a);
int naive_parity(di_int a)
{
int r = 0;
for (; a; a = a & (a - 1))
r = ~r;
return r & 1;
}
int test__paritydi2(di_int a)
{
si_int x = __paritydi2(a);
si_int expected = naive_parity(a);
if (x != expected)
printf("error in __paritydi2(0x%llX) = %d, expected %d\n",
a, x, expected);
return x != expected;
}
char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
char assumption_2[sizeof(si_int)*CHAR_BIT == 32] = {0};
int main()
{
int i;
for (i = 0; i < 10000; ++i)
if (test__paritydi2(((di_int)rand() << 32) + rand()))
return 1;
return 0;
}
|
