Functions I used to learn Assembly language on MIPS Architecture

mips_learn.vim

" Author: Tung Dao <me@tungdao.com>
" Usage: compile .c file, load generated .s file in vim,
" source this script and execute the function.
" Requires xgcc executable which comes with MipsIT
" Ex: xgcc -O3 -S -c foo.c
"     vim foo.s
" In vim:
" so ~/Desktop/mips_learn.vim
" call ToMIPS()

" Turns the numbered register to named one, compile with:
" xgcc -O3 -S -c foo.c
function! ToMIPS()
  let s:saved_gd = &gd
  set nogdefault
  silent! %s/\$0/zero/g
  silent! %s/\$10/t2/g
  silent! %s/\$11/t3/g
  silent! %s/\$12/t4/g
  silent! %s/\$13/t5/g
  silent! %s/\$14/t6/g
  silent! %s/\$15/t7/g
  silent! %s/\$16/s0/g
  silent! %s/\$17/s1/g
  silent! %s/\$18/s2/g
  silent! %s/\$19/s3/g
  silent! %s/\$20/s4/g
  silent! %s/\$21/s5/g
  silent! %s/\$22/s6/g
  silent! %s/\$23/s7/g
  silent! %s/\$24/t8/g
  silent! %s/\$25/t9/g
  silent! %s/\$26/k0/g
  silent! %s/\$27/k1/g
  silent! %s/\$28/gp/g
  silent! %s/\$29/sp/g
  silent! %s/\$30/fp/g
  silent! %s/\$31/ra/g
  silent! %s/\$1/at/g
  silent! %s/\$2/v0/g
  silent! %s/\$3/v1/g
  silent! %s/\$4/a0/g
  silent! %s/\$5/a1/g
  silent! %s/\$6/a2/g
  silent! %s/\$7/a3/g
  silent! %s/\$8/t0/g
  silent! %s/\$9/t1/g
  silent! %s/\$\ze//g
  let &gd = s:saved_gd
endfunction!

" Format the output to readable Assembly code with inline C comment, compile with:
" xgcc -c -g -O3 -Wa,-adhln,-L foo.c
function! FormatMIPS()
  silent! %s/^.\{19\}//
  silent! g/\.loc/d
  silent! call ToMIPS()
endfunction