* `ld64 $aDst0:Dst0+1, $mBase0, $mDelta0, $mOff0`
* `ld64 $aDst0:Dst0+1, $mBase0, $mDelta0, zimm12`

Load a single, naturally aligned 64-bit quantity fromTile Memory.

Destination register-file: ARF only

Effective address formed from:

:   -   Base address (`$m` register)
    -   Unsigned address delta (`$m` register)
    -   Unsigned scaled offset (`$m` register or immediate)

Data format:

:   -   Result is an unmodified 64-bit value stored in a naturally
        aligned register-pair.