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//===-- popcountsi2_test.c - Test __popcountsi2 ---------------------------===//
//
// 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 __popcountsi2 for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
#include "int_lib.h"
#include <stdio.h>
#include <stdlib.h>
// Returns: count of 1 bits
si_int __popcountsi2(si_int a);
int naive_popcount(si_int a)
{
int r = 0;
for (; a; a = (su_int)a >> 1)
r += a & 1;
return r;
}
int test__popcountsi2(si_int a)
{
si_int x = __popcountsi2(a);
si_int expected = naive_popcount(a);
if (x != expected)
printf("error in __popcountsi2(0x%X) = %d, expected %d\n",
a, x, expected);
return x != expected;
}
char assumption_2[sizeof(si_int)*CHAR_BIT == 32] = {0};
int main()
{
if (test__popcountsi2(0))
return 1;
if (test__popcountsi2(1))
return 1;
if (test__popcountsi2(2))
return 1;
if (test__popcountsi2(0xFFFFFFFD))
return 1;
if (test__popcountsi2(0xFFFFFFFE))
return 1;
if (test__popcountsi2(0xFFFFFFFF))
return 1;
int i;
for (i = 0; i < 10000; ++i)
if (test__popcountsi2(rand()))
return 1;
return 0;
}
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