Instruction Phase

Instruction phase is the critical timing point when the instruction behavior changes. Each instruction has 1 or more phases. It roughly corresponds to the FSM transition point of each level-2 controller. The following table list all the phases of each instruction on DRRA.

Instruction	Number	Phases
HALT	1	FETCH
REFI	4	FETCH, ISSUE, ACTIVE, END
DPU	4	FETCH, ISSUE, ACTIVE, END
SWB	3	FETCH, ISSUE, END
JUMP	1	FETCH
WAIT	2	FETCH, END
LOOP	1	FETCH
RACCU	2	FETCH, ISSUE
BRANCH	1	FETCH
ROUTE	4	FETCH, ISSUE, ARRIVE, END
SRAM	5	FETCH, ISSUE, ARRIVE, ACTIVE, END