vcls

Vector Count Leading Sign Bits

VCLS<c>.<dt> <Qd>, <Qm>

Counts number of consecutive sign bits.

Details

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

Pseudocode Operation

// Counts number of consecutive sign bits

Example

VCLS.dt q0, q2

Encoding

Binary Layout
11110011
1
D
11
sz
00
Vd
00100
Q
M
0
Vm
 
Format NEON 2-Reg
Opcode 0xF3B00200
Extension NEON (SIMD)

Operands

  • Qd
    Destination 128-bit SIMD register
  • Qm
    Second source 128-bit SIMD register