nc仿真突然挂掉

验证环境没做任何改动，但是改了rtl以后仿真就突然挂掉了。
打印
ncsim : *e sigusr: unix sigfpe raised from user application code
然后就退出了
之前的环境都是运行稳定的

ncsim/sigusr =
        The Unix signal indicated occurred either in user application code
        (for example, SystemC, PLI/VPI/VHPI/FMI application or DPI import
        function), or in code called from user application code. The user
        should use a C/C++ debugger to find the source of the issue and
        correct. The recommended method is to either use Simvision or
        manually debug the issue and
                - make sure your source code is compiled with -g
                - use debugger associated with compiler on ncelab/ncsim
                        executable
                - set a breakpoint on the function nc_signal_raised
                        gdb: break nc_signal_raised
                        dbx: stop in nc_signal_raised
                - For gdb, handle signals with nostop, noprint to avoid
                        seeing ncelab/ncsim use of Unix signals:
                        handle SIGBUS SIGSEGV SIGFPE SIGILL SIGALRM nostop noprint