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/*
* Copyright (c) 2019 The Regents of the University of California
* All rights reserved
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Bobby R. Bruce
Mahyar Samani
*/
#include <gtest/gtest.h>
#include "base/intmath.hh"
TEST(IntmathTest, isPowerOf2)
{
EXPECT_TRUE(isPowerOf2(1));
EXPECT_TRUE(isPowerOf2(65536));
EXPECT_TRUE(isPowerOf2(131072));
EXPECT_TRUE(isPowerOf2(262144));
EXPECT_FALSE(isPowerOf2(0));
EXPECT_FALSE(isPowerOf2(2521));
EXPECT_FALSE(isPowerOf2(1679616));
}
TEST(IntmathTest, power)
{
EXPECT_EQ(65536, power(2, 16));
EXPECT_EQ(9765625, power(5, 10));
EXPECT_EQ(43046721, power(power(3, 4), 4));
}
TEST(IntmathTest, floorLog2)
{
EXPECT_EQ(0, floorLog2(1));
EXPECT_EQ(4, floorLog2(16));
EXPECT_EQ(4, floorLog2(31));
EXPECT_EQ(5, floorLog2(36));
EXPECT_EQ(8, floorLog2(436));
EXPECT_EQ(16, floorLog2(65537));
EXPECT_EQ(20, floorLog2(1783592));
EXPECT_EQ(41, floorLog2(2821109907456));
}
TEST(IntmathTest, ceilLog2)
{
EXPECT_EQ(0, ceilLog2(1));
EXPECT_EQ(4, ceilLog2(16));
EXPECT_EQ(5, ceilLog2(31));
EXPECT_EQ(6, ceilLog2(36));
EXPECT_EQ(9, ceilLog2(436));
EXPECT_EQ(17, ceilLog2(65537));
EXPECT_EQ(21, ceilLog2(1783592));
EXPECT_EQ(42, ceilLog2(2821109907456));
}
TEST(IntmathTest, divCeil)
{
EXPECT_EQ(5, divCeil(55, 13));
EXPECT_EQ(90, divCeil(7922, 89));
EXPECT_EQ(4, divCeil(4800, 1442));
EXPECT_EQ(4, divCeil(75, 24));
EXPECT_EQ(46, divCeil(451, 10));
}
TEST(IntmathTest, roundUp)
{
EXPECT_EQ(4104, roundUp(4101, 4));
EXPECT_EQ(4112, roundUp(4105, 8));
EXPECT_EQ(4112, roundUp(4101, 16));
EXPECT_EQ(8192, roundUp(7991, 256));
}
TEST(IntmathTest, roundDown)
{
EXPECT_EQ(4100, roundDown(4101, 4));
EXPECT_EQ(4104, roundDown(4105, 8));
EXPECT_EQ(4096, roundDown(4101, 16));
EXPECT_EQ(7936, roundDown(7991, 256));
}
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