[jpegqs]

> 3 If the low bit on any operand is set, remove it, and replace that operand with m[operand] i.e., a dereference of that address

This dereference option makes a second instruction, this is not OISC.

[cpldcpu]

CISC view: Its another adressing mode.

RISC view: SUBLEQ is already four instructions (2x memory access, alu, branch)

[jpegqs]

3x memory access then, because read+read+write. And extra 0 to 3 reads in this work.