IntToFP: opt timing

Opt sbuffer timing

1. divide into three block
2. change io port:
  broadcastUop -> fastUopsIn
  selectUop    -> fastUopOut
  extraPorts   -> slowPorts
  etc.
the cross sub block io is not wrapped, to it later

Replace policy

difftest: able to show trap info for dual-core

* Now we use a full cycle to get a copy of data from buffer

scripts,vlsi_mem_gen: support simple reshape and width split for sram replacement

one can choose by use specified policy name such as "plru"

brq: set redirect.level to flushAfter to avoid unnecessary write back

roq: only update fflags when fmac,fmisc,i2f units write back

Perf: Add counter for BPU

Lsq, Roq: ld/st commit logic refactor

RS：wrap src data with special data module

LSQ: wrap data into "pure" data module