modelsim p&r后仿真

handsome

ok了，呵呵！谢谢大家这么热心的帮忙。就是那个原因。以下是帮助上的一段。
The instance paths in the SDF file are relative to the instance to which the SDF is applied.
Usually, this instance is an ASIC or FPGA model instantiated under a testbench. For
example, to annotate maximum timing values from the SDF file myasic.sdf to an instance
u1 under a top-level named testbench, invoke the simulator as follows:
vsim -sdfmax /testbench/u1=myasic.sdf testbench
If the instance name is omitted then the SDF file is applied to the top-level. This is usually
incorrect because in most cases the model is instantiated under a testbench or within a
larger system level simulation. In fact, the design can have several models, each having its
own SDF file. In this case, specify an SDF file for each instance. For example,
vsim -sdfmax /system/u1=asic1.sdf -sdfmax /system/u2=asic2.sdf system