ZERO (quad-vector)

Zero ZA quad-vector groups

The instruction zeroes one, two, or four ZA quad-vector groups. The lowest of the four consecutive vector numbers forming the quad-vector group within all of, each half of, or each quarter of the ZA array are selected by the sum of the vector select register and immediate offset, modulo all, half, or quarter the number of ZA array vectors.

The vector group symbol, VGx2 or VGx4, indicates that the ZA operand consists of two or four ZA quad-vector groups respectively.

It has encodings from 3 classes: One ZA quad-vector , Two ZA quad-vectors and Four ZA quad-vectors

One ZA quad-vector
(FEAT_SME2p1)

if !HaveSME2p1() then UNDEFINED; integer v = UInt('010':Rv); integer offset = UInt(off2:'00'); constant integer ngrp = 1; constant integer nvec = 4;

Two ZA quad-vectors
(FEAT_SME2p1)

if !HaveSME2p1() then UNDEFINED; integer v = UInt('010':Rv); integer offset = UInt(o1:'00'); constant integer ngrp = 2; constant integer nvec = 4;

Four ZA quad-vectors
(FEAT_SME2p1)

if !HaveSME2p1() then UNDEFINED; integer v = UInt('010':Rv); integer offset = UInt(o1:'00'); constant integer ngrp = 4; constant integer nvec = 4;