VCPOP.V

Vector Population Count

VCPOP.V vd, vs2, vm

Counts the number of set bits (1s) in each element.

Details

Counts the number of set bits in mask register vs2 that are active (within vl), writing the count to scalar rd.

Pseudocode Operation

foreach(i < vl): vd[i] = count_set_bits(vs2[i]);

Example

VCPOP.V v1, v4, v0.t

Encoding

Binary Layout
010010
31:26
vm
25
vs2
24:20
01110010
19:12
vd
11:7
1010111
6:0
 
Format OPIVV
Opcode 0x48072057
Extension Zvbb

Operands

  • vd
    Destination vector register
  • vs2
    Source vector register 2