CODEWITHSUNDEEP
cmips
ellio20
ellio20

Reputation: 57

Converting C code to MIPS Assembly

This is part of a program I have been working on and having trouble writing this lookup function part of the code. Here is the code in C but am having trouble converting it to MIPS. Any help would be appreciated.

Pseudo codes:
  $a0 = 0       # index into symTab array
compare:
  if ($a0 >= symAV($0))
     goto not_found
  if (TOKEN[0] <> symTab[$a0])
     goto nextSym
 if (TOKEN[1] <> symTab+4[$a0])
     goto nextSym
  return        # found the symbol
nextSym:
 $t0++      # should be incremented by 16 in MIPS
 goto compare

not_found:
 $a0 = -1
 return

Upvotes: 0

Views: 2326

Answers (1)

paxdiablo
paxdiablo

Reputation: 882626

Get yourself a compiler capable of generating MIPS output, such as gcc and then compile your code with the option "produce assembly output". gcc -S can do this for you.

Then take that code and examine/use it. If you want to understand it, you may want to ensure that optimisation is at a low level (such as with -O0). Otherwise there's a good chance you won't be able to make any sense of what the compiler generates.

Upvotes: 3

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