VCTZ.V

Vector Count Trailing Zeros

VCTZ.V vd, vs2, vm

Counts the number of trailing zero bits in each element.

Encoding

Binary Layout

010010

31:26

vm

25

vs2

24:20

01101010

19:12

vd

11:7

1010111

6:0

 

Format OPIVV

Opcode 0x4806A057

Extension Zvbb

Operands

• vd
  Destination vector register
• vs2
  Source vector register 2

Example

VCTZ.V v1, v4, v0.t

Related

More in Zvbb

Reference

View in RISC-V Unprivileged ISA Specification ↗ RISC-V ISA Manual

Description

Counts the number of trailing zero bits in each active vector element, writing counts to vd.

Operation

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