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| // RUN: %clang_builtins %s %librt -o %t && %run %t
// REQUIRES: librt_has_paritydi2
//===-- paritydi2_test.c - Test __paritydi2 -------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// 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;
}
|