SUMLALL (multiple and indexed vector)

Multi-vector signed by unsigned integer multiply-add long-long by indexed element

This signed by unsigned integer multiply-add long-long instruction multiplies each signed 8-bit element in the one, two, or four first source vectors with each unsigned 8-bit indexed element of the second source vector, widens each product to 32-bits and destructively adds these values to the corresponding 32-bit elements of the ZA quad-vector groups.

The elements within the second source vector are specified using an immediate element index which selects the same element position within each 128-bit vector segment. The element index range is from 0 to one less than the number of elements per 128-bit segment, encoded in 4 bits.

The quad-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 quad-vector groups respectively. The vector group symbol is preferred for disassembly, but optional in assembler source code.

This instruction is unpredicated.

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

One ZA quad-vector
(FEAT_SME2)

if !IsFeatureImplemented(FEAT_SME2) then UNDEFINED; constant integer esize = 32; constant integer v = UInt('010':Rv); constant integer n = UInt(Zn); constant integer m = UInt('0':Zm); constant integer offset = UInt(off2:'00'); constant integer index = UInt(i4h:i4l); constant integer nreg = 1;

Two ZA quad-vectors
(FEAT_SME2)

if !IsFeatureImplemented(FEAT_SME2) then UNDEFINED; constant integer esize = 32; constant integer v = UInt('010':Rv); constant integer n = UInt(Zn:'0'); constant integer m = UInt('0':Zm); constant integer offset = UInt(o1:'00'); constant integer index = UInt(i4h:i4l); constant integer nreg = 2;

Four ZA quad-vectors
(FEAT_SME2)

if !IsFeatureImplemented(FEAT_SME2) then UNDEFINED; constant integer esize = 32; constant integer v = UInt('010':Rv); constant integer n = UInt(Zn:'00'); constant integer m = UInt('0':Zm); constant integer offset = UInt(o1:'00'); constant integer index = UInt(i4h:i4l); constant integer nreg = 4;