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ngdbuild : logical net no load warning

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kcinimod

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Hi, while translating the VHDL design, i've encountered the following errors, can someone explain the warnings ?

Code: 
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_0_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_0_0_S1' has no load
WARNING - ngdbuild: logical net 'pre_count_cry_0_S0_0' has no load
WARNING - ngdbuild: logical net 'pre_count_s_0_S1_31' has no load
WARNING - ngdbuild: logical net 'pre_count_s_0_COUT_31' has no load
WARNING - ngdbuild: logical net 'data_count_cry_0_S0_0' has no load
WARNING - ngdbuild: logical net 'data_count_s_0_S1_31' has no load
WARNING - ngdbuild: logical net 'data_count_s_0_COUT_31' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_0_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_0_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_2_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_2_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_4_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_4_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_6_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_6_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_8_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_8_0_COUT' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_0_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_1_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_1_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_3_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_3_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_5_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_5_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_7_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_7_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_9_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_9_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_11_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_11_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_13_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_13_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_15_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_15_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_17_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_17_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_19_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_19_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_21_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_21_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_23_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_23_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_25_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_25_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_27_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_27_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_29_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_29_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_30_0_COUT' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_30_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_0_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_1_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_1_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_3_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_3_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_5_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_5_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_7_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_7_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_9_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_9_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_11_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_11_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_13_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_13_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_15_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_15_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_17_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_17_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_19_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_19_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_21_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_21_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_23_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_23_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_25_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_25_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_27_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_27_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_29_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_29_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_30_0_COUT' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_30_0_S1' has no load
WARNING - ngdbuild: DRC complete with 84 warnings
 

Sure. All those signals have no load.

:p

Which means that those signals are not connected to the input of something else further down the line. And as such the tools will optimize those away.
 

kcinimod said:
Hi, while translating the VHDL design, i've encountered the following errors, can someone explain the warnings ?

Code: 
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_0_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_0_0_S1' has no load
WARNING - ngdbuild: logical net 'pre_count_cry_0_S0_0' has no load
WARNING - ngdbuild: logical net 'pre_count_s_0_S1_31' has no load
WARNING - ngdbuild: logical net 'pre_count_s_0_COUT_31' has no load
WARNING - ngdbuild: logical net 'data_count_cry_0_S0_0' has no load
WARNING - ngdbuild: logical net 'data_count_s_0_S1_31' has no load
WARNING - ngdbuild: logical net 'data_count_s_0_COUT_31' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_0_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_0_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_2_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_2_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_4_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_4_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_6_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_6_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_8_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un1_pre_count_2_8_0_COUT' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_0_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_1_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_1_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_3_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_3_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_5_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_5_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_7_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_7_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_9_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_9_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_11_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_11_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_13_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_13_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_15_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_15_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_17_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_17_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_19_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_19_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_21_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_21_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_23_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_23_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_25_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_25_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_27_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_27_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_29_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_29_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_30_0_COUT' has no load
WARNING - ngdbuild: logical net 'compare_proc_un9_pre_count_1_cry_30_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_0_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_1_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_1_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_3_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_3_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_5_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_5_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_7_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_7_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_9_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_9_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_11_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_11_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_13_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_13_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_15_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_15_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_17_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_17_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_19_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_19_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_21_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_21_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_23_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_23_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_25_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_25_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_27_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_27_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_29_0_S0' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_29_0_S1' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_30_0_COUT' has no load
WARNING - ngdbuild: logical net 'compare_proc_dout2_cry_30_0_S1' has no load
WARNING - ngdbuild: DRC complete with 84 warnings
Click to expand...

I dont see any errors here :)
DRC has completed too....!!!
Why bother?... :)
 

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