InOrder Pipeline Stages
From gem5
					Pipeline Stages
In it's most basic incarnation, the In-Order model models a 5-stage pipeline.
The 5-stage pipeline is based on the 5-stage MIPS pipeline and has the following stages:
- Instruction Fetch (IF)
 - Instruction Decode (ID)
 - Execute (EX)
 - Memory Access (MEM)
 - Register Write Back (WB)
 
Relevant source files:
- first_stage.[hh,cc]
 - pipeline_stage.[hh,cc]