LD1ROB (scalar plus immediate)

Contiguous load and replicate thirty-two bytes (immediate index)

Load thirty-two contiguous bytes to elements of a 256-bit (octaword) vector from the memory address generated by a 64-bit scalar base address and immediate index that is a multiple of 32 in the range -256 to +224 added to the base address.

Inactive elements will not cause a read from Device memory or signal a fault, and are set to zero.

The resulting 256-bit vector is then replicated to fill the destination vector. The instruction requires that the current vector length is at least 256 bits, and if the current vector length is not an integer multiple of 256 bits then the trailing bits in the destination vector are set to zero.

Only the first thirty-two predicate elements are used and higher numbered predicate elements are ignored.

ID_AA64ZFR0_EL1.F64MM indicates whether this instruction is implemented.

SVE
(FEAT_F64MM)

if !HaveSVE() || !HaveSVEFP64MatMulExt() then UNDEFINED; integer t = UInt(Zt); integer n = UInt(Rn); integer g = UInt(Pg); integer esize = 8; integer offset = SInt(imm4);