75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
|
#include "lib/self_test.h"
|
||
|
|
||
|
#include "lib/bits.h"
|
||
|
|
||
|
class TestLib : public CxxTest::TestSuite
|
||
|
{
|
||
|
public:
|
||
|
void test_is_pow2()
|
||
|
{
|
||
|
TS_ASSERT_EQUALS(is_pow2(0u), false);
|
||
|
TS_ASSERT_EQUALS(is_pow2(~0u), false);
|
||
|
TS_ASSERT_EQUALS(is_pow2(0x80000001), false);
|
||
|
TS_ASSERT_EQUALS(is_pow2(1), true);
|
||
|
TS_ASSERT_EQUALS(is_pow2(1u << 31), true);
|
||
|
}
|
||
|
|
||
|
void test_log2_of_pow2()
|
||
|
{
|
||
|
TS_ASSERT_EQUALS(log2_of_pow2(0u), -1);
|
||
|
TS_ASSERT_EQUALS(log2_of_pow2(3u), -1);
|
||
|
TS_ASSERT_EQUALS(log2_of_pow2(0xffffffffu), -1);
|
||
|
TS_ASSERT_EQUALS(log2_of_pow2(1u), 0);
|
||
|
TS_ASSERT_EQUALS(log2_of_pow2(256u), 8);
|
||
|
TS_ASSERT_EQUALS(log2_of_pow2(0x80000000u), 31);
|
||
|
}
|
||
|
|
||
|
void test_ceil_log2()
|
||
|
{
|
||
|
TS_ASSERT_EQUALS(ceil_log2(3u), 2u);
|
||
|
TS_ASSERT_EQUALS(ceil_log2(0xffffffffu), 32u);
|
||
|
TS_ASSERT_EQUALS(ceil_log2(1u), 0u);
|
||
|
TS_ASSERT_EQUALS(ceil_log2(256u), 8u);
|
||
|
TS_ASSERT_EQUALS(ceil_log2(0x80000000u), 31u);
|
||
|
}
|
||
|
|
||
|
void test_ilog2f()
|
||
|
{
|
||
|
TS_ASSERT_EQUALS(ilog2(1.f), 0);
|
||
|
TS_ASSERT_EQUALS(ilog2(3.f), 1);
|
||
|
TS_ASSERT_EQUALS(ilog2(256.f), 8);
|
||
|
}
|
||
|
|
||
|
void test_round_up_to_pow2()
|
||
|
{
|
||
|
TS_ASSERT_EQUALS(round_up_to_pow2(0u), 1u);
|
||
|
TS_ASSERT_EQUALS(round_up_to_pow2(1u), 2u);
|
||
|
TS_ASSERT_EQUALS(round_up_to_pow2(127u), 128u);
|
||
|
TS_ASSERT_EQUALS(round_up_to_pow2(128u), 256u);
|
||
|
TS_ASSERT_EQUALS(round_up_to_pow2(129u), 256u);
|
||
|
}
|
||
|
|
||
|
void test_round_up()
|
||
|
{
|
||
|
TS_ASSERT_EQUALS(round_up( 0u, 16u), 0u);
|
||
|
TS_ASSERT_EQUALS(round_up( 4u, 16u), 16u);
|
||
|
TS_ASSERT_EQUALS(round_up(15u, 16u), 16u);
|
||
|
TS_ASSERT_EQUALS(round_up(20u, 32u), 32u);
|
||
|
TS_ASSERT_EQUALS(round_up(29u, 32u), 32u);
|
||
|
TS_ASSERT_EQUALS(round_up(0x1000u, 0x1000u), 0x1000u);
|
||
|
TS_ASSERT_EQUALS(round_up(0x1001u, 0x1000u), 0x2000u);
|
||
|
TS_ASSERT_EQUALS(round_up(0x1900u, 0x1000u), 0x2000u);
|
||
|
}
|
||
|
|
||
|
void test_round_down()
|
||
|
{
|
||
|
TS_ASSERT_EQUALS(round_down( 0u, 16u), 0u);
|
||
|
TS_ASSERT_EQUALS(round_down( 4u, 16u), 0u);
|
||
|
TS_ASSERT_EQUALS(round_down(15u, 16u), 0u);
|
||
|
TS_ASSERT_EQUALS(round_down(20u, 16u), 16u);
|
||
|
TS_ASSERT_EQUALS(round_down(29u, 16u), 16u);
|
||
|
TS_ASSERT_EQUALS(round_down(0x1900u, 0x1000u), 0x1000u);
|
||
|
TS_ASSERT_EQUALS(round_down(0x2001u, 0x2000u), 0x2000u);
|
||
|
}
|
||
|
};
|