DC warning请教

有人知道这种warning怎么解决不，我都不知道这些cell指的是什么，怎么查，
Warning: In design 'Lens_shading_top', cell 'I_4' does not drive any nets. (LINT-1)
Warning: In design 'Lens_shading_top', cell 'B_12' does not drive any nets. (LINT-1)
Warning: In design 'Lens_shading_top', cell 'B_13' does not drive any nets. (LINT-1)
Warning: In design 'Lens_mul_11_11_22_00', cell 'B_2' does not drive any nets. (LINT-1)
Warning: In design 'Lens_mul_22_11_33_00', cell 'B_2' does not drive any nets. (LINT-1)
Warning: In design 'Lens_mul_33_8_41_00', cell 'B_2' does not drive any nets. (LINT-1)
Warning: In design 'Lens_mul_44_8_52_00', cell 'B_2' does not drive any nets. (LINT-1)
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Error: Cannot find valid synthetic library module for operator 'div_UNS_OP'. (SYNDB-34)
Information: Changed wire load model for 'Lens_mul_44_8_52_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_33_8_41_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_33_8_41_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_33_8_41_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_33_8_41_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_22_11_33_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_22_11_33_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_22_11_33_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_11_11_22_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_22_11_33_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_11_11_22_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_shading_cal' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_44_8_52_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_33_8_41_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_33_8_41_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_33_8_41_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_33_8_41_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_22_11_33_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_22_11_33_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_22_11_33_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_11_11_22_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_22_11_33_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_11_11_22_00' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_shading_cal' from '(none)' to 'area_zero'. (OPT-170)
Information: Changed wire load model for 'Lens_mul_19_10_30_0c' from '(none)' to 'area_zero'. (OPT-170)

1、那些cell应该是把你的代码翻译成desingware lib生成的单元，在优化的时候给去掉了，估计你的代码质量很差！
2、error可能是你没有加目标lib吧！

有懂的人么

warning是因为你的端口悬空着，后面没有接到其他模块！

建议你到后端设计版块中去问问。我刚开始学后端，也不太懂，看着应该是你选的cell有那个引脚，而你在设计的电路里没用到，lib error说是让你改一下线载模型，具体的我也不会。后端版块对这些熟悉的人很多

I_4这个cell是你综合的时候工具给你生成的cell例化名， 比如 INVX4  I_4 （.a(x), .b(y)） 实际上你用到的CELL就是INVX4这个cell， no driver any net 值综合的时候工具优化掉了， 造成的某些CELL的连线浮空而已， 可以不去管它， 我就碰见过代码是4位的位宽， 但是综合以后就只有最高位和最低位 中间的两位就被综合优化了。
Error: Cannot find valid synthetic library module for operator 'div_UNS_OP'. 你要看你的配置文件中设置的综合库是不是这个库， 感觉就是你set_target_lib 的时候出了问题。

   我也遇到很多这样的Warning 真的不用管它么?

怎么解决的阿?求教

同意uid 927444 的回復