Due to a change in the Intel® Quartus® Prime Pro Edition Software version 23.3 and 23.2, you might see these errors at elaboration with the Cadence Xcelium* and Synopsys VCS* simulators:
Synopsys VCS* simulator
Error-[ICPD_INIT] Illegal combination of drivers <QUARTUS_INSTALL_DIR>/eda/sim_lib/synopsys/ctfb_hssi_atoms_ncrypt.sv, 4246150
Cadence Xcelium* simulator
xmelab: *E,MULAXX (<QUARTUS_INSTALL_DIR>/eda/sim_lib/ctfb_hssi_atoms_ncrypt.sv): Multiple drivers to always_ff output variable clairvoyance_match detected..
These errors only occur when simulating Intel® FPGA F-tile IPs.
To work around these problems, use simulator-specific switches to proceed with the simulation.
Synopsys VCS* simulator:
Use the elaboration switch ( -ignore initializer_driver_checks) in your script.
Example:
USER_DEFINED_ELAB_OPTIONS="-ignore initializer_driver_checks ”
sh $QSYS_SIMDIR/synopsys/vcs/vcs_setup.sh QSYS_SIMDIR=$QSYS_SIMDIR QUARTUS_INSTALL_DIR=$QUARTUS_INSTALL_DIR USER_DEFINED_ELAB_OPTIONS="\"$USER_DEFINED_ELAB_OPTIONS\"" SKIP_SIM=$SKIP_SIM TOP_LEVEL_NAME=$TOP_LEVEL_NAME
After adding this switch the error message is converted to the following warning:
Warning-[LOOP-REROLL-ENABLED] Loop reroll optimization is enabled <QUARTUS_INSTALL_DIR>/eda/sim_lib/synopsys/ctfb_hssi_atoms2_ncrypt.sv, 26
It will affect the line debug capacity for this block. Please add the switch -Xrerolloff if you want to preserve line debug capacity for this block.
Cadence Xcelium* simulator:
Use the elaboration switch ( -warn_multiple_driver ) in your script.
Example:
xmelab -warn_multiple_driver -relax -timescale '1 ps / 1 fs' -genhier -access +rwc <top_level_name>
After adding this switch the error message is converted to the following warning:
xmelab: *W,MULAXX (<QUARTUS_INSTALL_DIR>/eda/sim_lib/ctfb_hssi_atoms_ncrypt.sv): Multiple drivers to always_ff output variable clairvoyance_match detected..
This problem is scheduled to be fixed in a future release of the Intel® Quartus® Prime Pro Edition Software.