用SCH格式重新建了项目,在项目中加入了CORE IP生成的24int和28uint相加的加法器,然后在MAP时出现以下错误信息:
MapLib:979 - LUT3 symbol "D13/D6/U0/xst_addsub/i_baseblox.i_baseblox_addsub/pipelining.stages[1].slices[1].first.first_stage_adder/i_lut4.i_lut4_addsub/halfsum<0>1" (output signal=D13/D6/U0/xst_addsub/i_baseblox.i_baseblox_addsub/pipelining.stages[1].slices[1].first.first_stage_adder/i_lut4.i_lut4_addsub/halfsum<0>) has input signal "D13/D6/bypass" which will be trimmed. See Section 5 of the Map Report File for details about why the input signal will become undriven.
哪位大侠知道是什么原因?