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Add util::log2

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This commit is contained in:
Nikita Lisitsa 2021-07-07 18:58:13 +03:00
parent b97e7bc26c
commit b243639f8d
1 changed files with 14 additions and 0 deletions
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14
libs/util/include/psemek/util/bits.hpp
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@ -5,6 +5,20 @@
namespace psemek::util namespace psemek::util
{ {
// log2 rounded down
template <typename T>
T log2(T x)
{
T result = 0;
while (x > 1)
{
++result;
x /= 2;
}
return result;
}
// round up to power of 2 // round up to power of 2
template <typename T> template <typename T>
T round_pow2(T x) T round_pow2(T x)