Regexp rules to convert psx asm to gas syntax

PSXasm2Gas.md

replace symbols declarations

symbol equ value becomes

.equ symbol,value

replace rXX wit $XX

s\ r([0-9]{1,2}) \ \$\1

replace labels .stuff with stuff:

s\ ^\.([a-zA-Z_0-9]*) \ \1\:

replace SYMBOL rh 1

rh -> .short rw -> .long rb -> .byte

SYMBOL rh 1 =>

       .short 1```

s\ ^([A-Z0-9_A-Z_a-z0-9]*)\ *\.([a-z]*)\ ([0-9]*) \ .\1:\n\t\t\.\2 \3