Count number of 0's from the most significant bit to the least stopping at the first 1.
Synopsis
Declared in <llvm/ADT/bit.h>
template<typename T>
[[nodiscard]]
constexpr
int
countl_zero_constexpr(T Val);Description
A constexpr version of countl_zero.
Only unsigned integral types are allowed.
Returns std::numeric_limits<T>::digits on an input of 0.
Return Value
Leading zero count, or std::numeric_limits<T>::digits if Val is 0.
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Note
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The return value should not be discarded. |
Parameters
Name |
Description |
Val |
Unsigned value to scan from the most significant bit. |
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