27.1.23.6 Instruction arefo
Synopsys:
Given an array ARR and an index ULONG, push the offset of the
element occupying that position in the array.
If the provided index is out of bounds, then raise
PVM_E_OUT_OF_BOUNDS.
Stack: ( ARR ULONG -- ARR ULONG OFF )
Exceptions: PVM_E_OUT_OF_BOUNDS