hphp/util/test/bitops.cpp

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-2015 Facebook, Inc. (http://www.facebook.com)     |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #include "hphp/util/bitops.h"
  18 #include <gtest/gtest.h>
  19
  20 namespace HPHP {
  21
  22 TEST(BitopsTest, FfsNonzero) {
  23   int64_t out;
  24   int64_t one = 1;
  25   bool res;
  26   for (int i = 0; i < 63; i++) {
  27     res = ffs64(one << i, out);
  28     EXPECT_TRUE(res);
  29     EXPECT_EQ(i, out);
  30   }
  31 }
  32
  33 TEST(BitopsTest, FlsNonzero) {
  34   int64_t out;
  35   int64_t one = 1;
  36   bool res;
  37   for (int i = 0; i < 63; i++) {
  38     res = fls64(one << i, out);
  39     EXPECT_TRUE(res);
  40     EXPECT_EQ(i, out);
  41   }
  42 }
  43
  44 TEST(BitopsTest, FfsZero) {
  45   int64_t zero = 0;
  46   int64_t out;
  47   EXPECT_FALSE(ffs64(zero, out));
  48 }
  49
  50 TEST(BitopsTest, FlsZero) {
  51   int64_t zero = 0;
  52   int64_t out;
  53   EXPECT_FALSE(fls64(zero, out));
  54 }
  55
  56 }