Why do I get the wrong result for ALTERA_FP_FUNCTION IP in VCSMX Simulation?

Description

You may see a wrong result 'xxxxxxxxx' for ALTERA_FP_FUNCTION IP in VCSMX Simulation in Quartus® Prime Software Pro/Standard Edition version 16.0/16.1.

This is due to verilog "ncrypt" files are filtered out when generating device compilation library. 

Other simulators except VCSMX do not affect to this issue. 

Resolution

To work around this problem, add all *ncrypt* files into the simulation script.

vlogan v2k $USER_DEFINED_VERILOG_COMPILE_OPTIONS $USER_DEFINED_COMPILE_OPTIONS   "$QUARTUS_INSTALL_DIR/eda/sim_lib/synopsys/twentynm_atoms_ncrypt.v"      -work twentynm

vlogan v2k $USER_DEFINED_VERILOG_COMPILE_OPTIONS $USER_DEFINED_COMPILE_OPTIONS   "$QUARTUS_INSTALL_DIR/eda/sim_lib/synopsys/twentynm_hssi_atoms_ncrypt.v" -work twentynm_hssi

vlogan v2k $USER_DEFINED_VERILOG_COMPILE_OPTIONS $USER_DEFINED_COMPILE_OPTIONS   "$QUARTUS_INSTALL_DIR/eda/sim_lib/synopsys/twentynm_hip_atoms_ncrypt.v"  -work twentynm_hip

This problem is scheduled to be fixed in a later release of the Quartus® Prime software.