clz

Count Leading Zeros

CLZ <Wd>, <Wn>

Counts number of consecutive zeros.

Details

The Count Leading Zeros instruction counts number of consecutive zeros.

Pseudocode Operation

Wd ← count of leading zero bits in Wn

Example

CLZ w0, w1

Encoding

Binary Layout
01011010
110
00000
001000
Rn
Rd
 
Format Data Processing
Opcode 0x5AC01000
Extension Base

Operands

  • Wd
    Destination 32-bit integer register
  • Wn
    First source / base 32-bit integer register