For consecutive instructions that do not raise exceptions,
they can share a same rob entry and reduce rob consumption.

Only scalar instructions are supported now.

---------
Co-authored-by: Nfdy <841513191@qq.com>

DefaultConfig：
[ALU]*2 + [ALU + MUL]*2 + [ALU+BJU]*2 + IMISC(to Vf) + IMISC(to Int)
IssueQueueSize is 32
RegfileReadPort: ALU * 6 + Load * 2 are the base, other exeUnit reuse the src2 port

MinimalConfig:
Same with Default Config except that issueQueueSize is 4.

TODO: minimize exu/issuequeue num of MinimalConfig
TODO: larger ALU exe window needs larger ifetch, decode, rename, dispatch window.

* Prepare for merge master

* Prepare for merge master

* Data in dontTouch should be hardware type not literal type.
* Mux1H will return input data directly, when there is only one sel input. When input data is not hardware type, a firrtl.annotations.AnnotationException will be raised.

* Since all exu used as source of wake-up must be ready at OG1 stage, there is no need to take the cancel signal of indirect source of wake-up into consideration.

* PerfCnt related inst run in csr should assign isPerfCnt as true

* ParallelOperation have data width bugs when T in Seq[T] has different data width.

* Src timer record the cycles of src's been waked up.
* Src timer should not overflow since it started.

* Uop canceled in CancelNetwork should be used as cancel source to cancel another uop in IQ
* The uop canceled in CancelNetwork should be one cycle after it been waked up by IQ.

* Src timer should start counting when src is waked up by IQ, and increase until entry dequeue or src set as not ready.
* Can be used as debug training.

* Dest x0 can wake up no uop.
* Can be used as debug training.

* Split IssueQueueWakeUpBundle into IssueQueueWBWakeUpBundle and IssueQueueIQWakeUpBundle.
* Add cancel bundle used to cancel waked-up uop src
* Add srcTimer in StatusArray to record the cycles src has been waked up
* Add dataSources in StatusArray to record the source of src data (reg, forward, bypass or none)
* Remove useless ready field in StatusArray

* one-hot encoded exu indices are would be used in datapath to select bypassed exu data

* Since backendParams get from Parameters produced by function call, a new backendParams is created every time.

* use lazy evaluation