cpu-o3: separate difftest from instDone

OpenXiangShan / GEM5

BSD 3-Clause "New" or "Revised" License

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Closed shinezyy closed 2 years ago

shinezyy commented 2 years ago

Because updateMiscReg is done after cpu.instDone, we cannot get updated Misc regs in cpu.instDone
Always check misc regs like mstatus

Change-Id: I7a88144f48ba4368e44d5932f3f71ec1fb715b5a