40 lines
946 B
C++
40 lines
946 B
C++
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/*
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* Copyright 2023 Meta
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/sys/util.h>
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#include <zephyr/ztest.h>
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static constexpr uint8_t val = LOG2(42);
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static constexpr uint8_t val64 = LOG2(42 + BIT64(32));
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template <typename T> static inline constexpr uint8_t log2(T x)
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{
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return LOG2(x);
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}
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ZTEST(pot, test_constexpr_LOG2)
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{
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zassert_equal(-1, LOG2(0));
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zassert_equal(0, LOG2(1));
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zassert_equal(1, LOG2(2));
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zassert_equal(1, LOG2(3));
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zassert_equal(2, LOG2(4));
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zassert_equal(2, LOG2(5));
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zassert_equal(31, LOG2(BIT(31)));
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zassert_equal(31, LOG2(BIT(31) + 1));
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zassert_equal(31, LOG2(UINT32_MAX));
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zassert_equal(32, LOG2(BIT64(32)));
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zassert_equal(62, LOG2(BIT64(63) - 1));
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zassert_equal(63, LOG2(BIT64(63)));
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zassert_equal(63, LOG2(BIT64(63) + 1));
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zassert_equal(63, LOG2(UINT64_MAX));
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zassert_equal(5, val);
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zassert_equal(5, log2(42));
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zassert_equal(32, val64);
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zassert_equal(32, log2(42 + BIT64(32)));
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}
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