$clog2(N) 在 Mojo 中的函数 IDE
Function of $clog2(N) in Mojo IDE
我是这方面的初学者，但我想知道 $clog2(N) 的功能到底是什么？有的网站说是N大小的内存所需要的地址位数，而不是表示N值所需要的位数，什么意思？
IEEE Std 1800-2012 § 20.8.1 整数数学函数
The system function $clog2 shall return the ceiling of the log base 2 of the argument (the log rounded up to an integer value). The argument can be an integer or an arbitrary sized vector value. The argument shall be treated as an unsigned value, and an argument value of 0 shall produce a result of 0.
This system function can be used to compute the minimum address width necessary to address a memory of a given size or the minimum vector width necessary to represent a given number of states.
For example:
integer result;
result = $clog2(n);
我是这方面的初学者，但我想知道 $clog2(N) 的功能到底是什么？有的网站说是N大小的内存所需要的地址位数，而不是表示N值所需要的位数，什么意思？
IEEE Std 1800-2012 § 20.8.1 整数数学函数
The system function
$clog2shall return the ceiling of the log base 2 of the argument (the log rounded up to an integer value). The argument can be an integer or an arbitrary sized vector value. The argument shall be treated as an unsigned value, and an argument value of 0 shall produce a result of 0.This system function can be used to compute the minimum address width necessary to address a memory of a given size or the minimum vector width necessary to represent a given number of states.
For example:
integer result; result = $clog2(n);