ZERO (double-vector)

Zero ZA double-vector groups

The instruction zeroes one, two, or four ZA double-vector groups.

The double-vector group within all of, each half of, or each quarter of the ZA array is selected by the sum of the vector select register and offset range, 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 double-vector groups respectively.

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

One ZA double-vector
(FEAT_SME2p1)

if !IsFeatureImplemented(FEAT_SME2p1) then UNDEFINED; constant integer v = UInt('010':Rv); constant integer offset = UInt(off3:'0'); constant integer ngrp = 1; constant integer nvec = 2;

Two ZA double-vectors
(FEAT_SME2p1)

if !IsFeatureImplemented(FEAT_SME2p1) then UNDEFINED; constant integer v = UInt('010':Rv); constant integer offset = UInt(off2:'0'); constant integer ngrp = 2; constant integer nvec = 2;

Four ZA double-vectors
(FEAT_SME2p1)

if !IsFeatureImplemented(FEAT_SME2p1) then UNDEFINED; constant integer v = UInt('010':Rv); constant integer offset = UInt(off2:'0'); constant integer ngrp = 4; constant integer nvec = 2;