I'm writing a simple Perl script that translates assembly instruction strings to 32-bit binary code.
I decided to handle translation grouping instruction by type (ADD and SUB are R-Type instructions and so on...) so in my code I'm doing something like this:
my $bin = &r_type($instruction) if $instruction =~ /^(?:add|s(?:ub|lt|gt))\s/;
because I want to handle add, sub, slt and sgt in the same way.
I realized however that maybe using that regular expression could be an 'overkill' for the task I'm supposed to do... could the pattern
/^(?:add|sub|slt|sgt)\s/
represent a better use of regular expressions in this case?
Thanks a lot.