Count leading zeros

The clz instructions, short for count leading zeros, are used to count the amount of zeros at the start of the numbers binary representation.

Try it


;; load a number onto the stack
i32.const 8388608 ;; 00000000_10000000_00000000_00000000

;; count leading zeros

;; the top item on the stack will now be 8
Instruction Binary opcode
i32.clz 0x67
i64.clz 0x79