43 lines
964 B
C++
43 lines
964 B
C++
#include <gtest/gtest.h>
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extern "C" {
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#include "openair1/PHY/TOOLS/tools_defs.h"
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#include "common/utils/LOG/log.h"
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}
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#include <cmath>
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uint8_t log2_approx_ref(uint32_t x)
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{
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return std::round(std::log2(x));
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}
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TEST(log2_approx, complete)
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{
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for (uint32_t i = 0; i < UINT32_MAX; i++)
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EXPECT_EQ(log2_approx(i), log2_approx_ref(i));
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}
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TEST(log2_approx, boundaries)
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{
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for (int i = 0; i < 32; i++) {
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uint32_t i2 = std::pow(2.0, i + 0.5);
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EXPECT_EQ(log2_approx(i2), i) << "log2(" << i2 << ")";
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EXPECT_EQ(log2_approx(i2 + 1), i + 1) << "log2(" << i2 + 1 << ")";
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}
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}
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TEST(log2_approx64, boundaries)
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{
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for (int i = 0; i < 64; i++) {
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unsigned long long int i2 = std::pow(2.0L, i + 0.5L);
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EXPECT_EQ(log2_approx64(i2), i) << "log2(" << i2 << ")";
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EXPECT_EQ(log2_approx64(i2 + 1), i + 1) << "log2(" << i2 + 1 << ")";
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}
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}
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int main(int argc, char **argv)
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{
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logInit();
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testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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