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