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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2011-2022 Blender Foundation */
#include "testing/testing.h"
#include "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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