diff options
| -rw-r--r-- | src/base/SConscript | 1 | ||||
| -rw-r--r-- | src/base/intmath.hh | 1 | ||||
| -rw-r--r-- | src/base/intmath.test.cc | 102 |
3 files changed, 104 insertions, 0 deletions
diff --git a/src/base/SConscript b/src/base/SConscript index 1c2f80baf..a01146384 100644 --- a/src/base/SConscript +++ b/src/base/SConscript @@ -58,6 +58,7 @@ Source('hostinfo.cc') Source('inet.cc') Source('inifile.cc') GTest('inifile.test', 'inifile.test.cc', 'inifile.cc', 'str.cc') +GTest('intmath.test', 'intmath.test.cc') Source('logging.cc') Source('match.cc') GTest('match.test', 'match.test.cc', 'match.cc', 'str.cc') diff --git a/src/base/intmath.hh b/src/base/intmath.hh index 449a49ca8..711260fc6 100644 --- a/src/base/intmath.hh +++ b/src/base/intmath.hh @@ -134,6 +134,7 @@ template <class T> inline int ceilLog2(const T& n) { + assert(n > 0); if (n == 1) return 0; diff --git a/src/base/intmath.test.cc b/src/base/intmath.test.cc new file mode 100644 index 000000000..cd0518682 --- /dev/null +++ b/src/base/intmath.test.cc @@ -0,0 +1,102 @@ +/* + * 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)); +} |