IBuf.md

Rocket/rocket/IBuf

A buffer in between of IF and ID to handle RVC.

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class Instruction

Instruction data struction from instruction fetch unit.

• Bundle component

name	type	description
pf0	Bool	page fault on the first half of instruction
pf1	Bool	page fault on the second half of instruction
ae0	Bool	access exception on the first half of instruction
ae1	Bool	access exception on the second half of instruction
replay	Bool	replay this instruction due to instruction cache
btb_hit	Bool	indicated a predicted branch target (taken)
rvc	Bool	RVC instructions
inst	ExpandedInstruction	expanded instruction
raw	UInt	raw instruction

class IBuf

Buffer for decoding RVC instructions This module is not fully implemented yet.

• I/O, type and parameters

name	type	direction	description
p	Parameters	param	configuration
imem	DecoupledIO[FrontendResp]	I	fetched instructiond from instruction cache
kill	Bool	I	kill instructions from core pipe
pc	UInt	O	current PC of IF
btb_resp	BTBResp	O	update to BTB for RAS
inst	Vec[DecoupledIO[Instruction]]	O	instructions for core pipe

_{Last updated: 08/07/2017
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