SQDMULH (multiple and single vector)

Multi-vector signed saturating doubling multiply high by vector

Multiply then double the corresponding signed elements of the two or four first source vectors and the signed elements of the second source vector, and destructively place the most significant half of the result in the corresponding elements of the two or four first source vectors. Each result element is saturated to the N-bit element's signed integer range -2^(N-1) to (2^(N-1))-1.

This instruction is unpredicated.

It has encodings from 2 classes: Two registers and Four registers

Two registers
(FEAT_SME2)

if !IsFeatureImplemented(FEAT_SME2) then UNDEFINED; constant integer esize = 8 << UInt(size); constant integer dn = UInt(Zdn:'0'); constant integer m = UInt('0':Zm); constant integer nreg = 2;

Four registers
(FEAT_SME2)

if !IsFeatureImplemented(FEAT_SME2) then UNDEFINED; constant integer esize = 8 << UInt(size); constant integer dn = UInt(Zdn:'00'); constant integer m = UInt('0':Zm); constant integer nreg = 4;