I'm "re-learning" 68000 assembly language and came across the "MOVEQ" command that is labeled "MOVE QUICK".
According to the NXP Programmers Reference Manual (reference below), the command
MOVEQ (MOVE QUICK) is described as:
Moves a byte of immediate data to a 32-bit data register. The data in an 8-bit field within the operation word is sign- extended to a long operand in the data register as it is transferred.
I've searched the manual and cannot find why it's "quick".
Meaning, what's the difference (in performance) in the following instructions?
MOVEQ #100, D0 MOVE #100, D0
I gather the
MOVEQ is a better fit for moving 8-bit data. Or, is it ONLY 8-bits of data as I cannot seem to confirm.