cls

Count Leading Sign Bits

CLS <Wd>, <Wn>

Counts number of consecutive sign bits.

Details

The Count Leading Sign Bits instruction counts number of consecutive sign bits.

Pseudocode Operation

Wd ← count of leading sign bits in Wn

Example

CLS w0, w1

Encoding

Binary Layout
01011010
110
00000
001010
Rn
Rd
 
Format Data Processing
Opcode 0x5AC01400
Extension Base

Operands

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