ASIC/FPGA Design and Verification Out Source Services

vim :: How to search a line, that does not contain a specific pattern.

1. Sometimes it may be useful to search a line, that does not contain a specific pattern. The following command, with the regular expression in it, will match all lines, which does not contain it.
   /^\(\(The_Regular_Expression\)\@!.\)*$
   
   


2. This option was a real asset to me, when I worked on a net-list of a very large ASIC. Once I found a pad, by its name, I had to go back to the instance name. These chips sometimes have hundreds of pads and search like this would do the job, saving lots of tedious keystrokes:
   ?^\(\(.*\.[a-zA-Z].*\)\@!.\)*$
   So the expression is targeted to filter verilog input or output i.e. a dot (.) followed by the signal name.

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