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