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Possible fix for interrupt during a floating point divide.

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Ross Thompson 2022-10-18 15:04:21 -05:00
parent 65c2fe294a
commit 47608df73e
1 changed files with 1 additions and 1 deletions
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pipelined/src/hazard/hazard.sv
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@ -69,7 +69,7 @@ module hazard(
assign StallECause = (DivBusyE) & ~(TrapM); // *** can we move to decode stage (KP?) assign StallECause = (DivBusyE) & ~(TrapM); // *** can we move to decode stage (KP?)
// WFI terminates if any enabled interrupt is pending, even if global interrupts are disabled. It could also terminate with TW trap // WFI terminates if any enabled interrupt is pending, even if global interrupts are disabled. It could also terminate with TW trap
// assign StallMCause = (wfiM & (~TrapM & ~IntPendingM)); // | FDivBusyE; // assign StallMCause = (wfiM & (~TrapM & ~IntPendingM)); // | FDivBusyE;
assign StallMCause = (wfiM & (~TrapM & ~IntPendingM)) | FDivBusyE; assign StallMCause = ((wfiM | FDivBusyE) & (~TrapM & ~IntPendingM)); //*** Ross: should FDivBusyE trigger StallECause rather than StallMCause similar to DivBusyE?
assign StallWCause = LSUStallM | IFUStallF; assign StallWCause = LSUStallM | IFUStallF;
assign #1 StallF = StallFCause | StallD; assign #1 StallF = StallFCause | StallD;