| 1 | #pragma once |
| 2 | |
| 3 | #include <climits> |
| 4 | #include <iostream> |
| 5 | |
| 6 | inline constexpr uint32_t next_pow_2(uint32_t const num) { |
| 7 | if (num <= 1) return num; |
| 8 | return 1 << (CHAR_BIT * sizeof(num) - __builtin_clz(num - 1)); |
| 9 | } |
| 10 | |
| 11 | template <typename A, typename B> |
| 12 | static inline constexpr auto div_ceil(A a, B b) { |
| 13 | return (a + b - 1) / b; |
| 14 | } |
| 15 | |
| 16 | // Round a down to the next multiple of b. The caller is responsible for making |
| 17 | // sure that b is non-zero |
| 18 | template <typename T> |
| 19 | inline constexpr T round_to_previous_multiple_of(T a, T b) { |
| 20 | return a % b == 0 ? a : (a / b) * b; |
| 21 | } |
| 22 | |
| 23 | // Round a up to the next multiple of b. The caller is responsible for making |
| 24 | // sure that b is non-zero |
| 25 | template <typename T> |
| 26 | inline constexpr T round_to_next_multiple_of(T a, T b) { |
| 27 | return a % b == 0 ? a : ((a / b) + 1) * b; |
| 28 | } |