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鄙人近来用MODELSIM SE 做仿真<br /><br />做了一个除法器 然后仿真后 结果是正确的，但是出现大串大串的如下警告<br /><br />Warning: There is an 'U'|'X'|'W'|'Z'|'-' in an arithmetic operand, the result will be 'X'(es).<br /><br />下边这个是ISE综合时候产生的警告：<br /><br />PACKER Warning: Lut divider__n0003<15>lut driving carrydivider__n0003<15>cy can not be packed with the carry due to conflict with the common signal requirement between the LUT inputs and the Carry DI/MAND pins. This would result in an extra LUT for a feedthrough.<br /><br />望指点迷津 不甚感激！<br /> |
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