D-Form VS X-Form

20. D-Form VS X-Form
D-Form is the immediate/register addressing mode.
X-Form is the register/register addressing mode.
Otherwise known as unindexed and indexed loads respectivelly
So if you have a series consecutive loads, the D-Form loads have a huge advantage.
Because with X-Form loads you have to have the offset in a register so you get consecutive
 offsets by either using multiple registers or having instructions in between to increment the offset.