RenameTable: map arch regs to 0-31 phy regs initially
freelist: init freelist without preg0
debug-log: add dispatch,busytable log
Rename: add log
BusyTable: add bypass
FreeList: set tailPtr's initial value to '1<<PhyRegIdxWidth'
FreeList: use an additional bit to check freelist empty
RenameTable: Remove debug code
Rename: impl freelist, rename table, busy table
Rename: add regfile read address into Input
Rename: send phy-reg status(rdy/busy) to dispatch-2
Adjust pipeline, refactor EXU, IssueQueue
Initially completed the module interface design
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