Reapply "fix: int will not care excp"

This reverts commit 7a38f38.

Author: yizishun

rtl/src/backend/rob/ROB.scala

@@ -617,6 +617,7 @@ class ROB(val parameter: ROBParameter) extends Module with SerializableModule[RO
   io.writeBackData.lsuWriteBack.ready := true.B
 
   val intrNoReg = RegInit(0.U(13.W))
+  val sampleInt = Wire(Bool())
   def shouldCommitException(idx: UInt): Bool =
     exceptionInfo(idx).ecodes === ECodes.SYS ||
       exceptionInfo(idx).ecodes === ECodes.BRK
@@ -626,6 +627,7 @@ class ROB(val parameter: ROBParameter) extends Module with SerializableModule[RO
       valid(deqPtr.value) &&
       writeBacked(deqPtr.value) &&
       (robState === s_normal || robState === s_idle) &&
+      sampleInt &&
       io.lsuCanCommit // hasException 只会存在一个周期，这一个周期会commit掉syscall指令，并将状态转移到exception状态
   /** 4.Commit */
   val commit = Wire(
@@ -829,14 +831,14 @@ class ROB(val parameter: ROBParameter) extends Module with SerializableModule[RO
     io.icacheOpBranchInfo.bits.isRet     := false.B
   }
   // [Interrupt]
+  sampleInt := false.B
   intrCanCommit := true.B
   val intrNo =
     io.intrInfo.estat.is_12 ## io.intrInfo.estat.is_11 ## io.intrInfo.estat.zero1 ## io.intrInfo.estat.is_9_2 ## io.intrInfo.estat.is_1_0
   when(intrNo =/= 0.U && canSampleIntr && io.intrInfo.ie) { // lock the first intr i meet
     when(
       valid(deqPtr.value) &&
-        ((!exception(deqPtr.value) &&
-          exceptionInfo(deqPtr.value).ecodes === ECodes.NONE &&
+        ((
           robState === s_normal &&
           writeBacked(deqPtr.value) &&
           !io.redirect.valid &&
@@ -845,6 +847,7 @@ class ROB(val parameter: ROBParameter) extends Module with SerializableModule[RO
       exception(deqPtr.value)            := true.B
       exceptionInfo(deqPtr.value).ecodes := ECodes.INT
       intrNoReg                          := intrNo
+      sampleInt                          := true.B
       io.intrInfo.canSampleIntr          := false.B
       canSampleIntr                      := false.B // lock
       intrCanCommit                      := false.B