Illegal Instruction Exception Raised Incorrectly - FENCE

Created by: shetalani

RISC-V Specification:

Issue Description:

Executing FENCE instruction raises wrongly an illegal instruction exception.

Example:

As shown below, the instruction 32'h7b21008f (FENCE) is decoded at time point t##0, where MSTATUS, MCAUSE and MEPC are updated at t##2 (closed) as if it had caused an illegal instruction exception.

Top Level Parameters

cv32e40p_core #(
    .FPU                      ( 0 ),
    .NUM_MHPMCOUNTERS         ( 1 ),
    .PULP_CLUSTER             ( 0 ),
    .PULP_XPULP               ( 0 ),
    .PULP_ZFINX               ( 0 )
) 

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Product: OneSpin 360 DV-Verify App: RVV Tool's version: 2020.1.4