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/*
* Copyright 2011-2021 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "testing/testing.h"
#include "util/util_math.h"
CCL_NAMESPACE_BEGIN
TEST(math, next_power_of_two)
{
EXPECT_EQ(next_power_of_two(0), 1);
EXPECT_EQ(next_power_of_two(1), 2);
EXPECT_EQ(next_power_of_two(2), 4);
EXPECT_EQ(next_power_of_two(3), 4);
EXPECT_EQ(next_power_of_two(4), 8);
}
TEST(math, prev_power_of_two)
{
EXPECT_EQ(prev_power_of_two(0), 0);
EXPECT_EQ(prev_power_of_two(1), 1);
EXPECT_EQ(prev_power_of_two(2), 1);
EXPECT_EQ(prev_power_of_two(3), 2);
EXPECT_EQ(prev_power_of_two(4), 2);
EXPECT_EQ(prev_power_of_two(5), 4);
EXPECT_EQ(prev_power_of_two(6), 4);
EXPECT_EQ(prev_power_of_two(7), 4);
EXPECT_EQ(prev_power_of_two(8), 4);
}
TEST(math, reverse_integer_bits)
{
EXPECT_EQ(reverse_integer_bits(0xFFFFFFFF), 0xFFFFFFFF);
EXPECT_EQ(reverse_integer_bits(0x00000000), 0x00000000);
EXPECT_EQ(reverse_integer_bits(0x1), 0x80000000);
EXPECT_EQ(reverse_integer_bits(0x80000000), 0x1);
EXPECT_EQ(reverse_integer_bits(0xFFFF0000), 0x0000FFFF);
EXPECT_EQ(reverse_integer_bits(0x0000FFFF), 0xFFFF0000);
EXPECT_EQ(reverse_integer_bits(0x00FF0000), 0x0000FF00);
EXPECT_EQ(reverse_integer_bits(0x0000FF00), 0x00FF0000);
EXPECT_EQ(reverse_integer_bits(0xAAAAAAAA), 0x55555555);
}
CCL_NAMESPACE_END
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