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{-# LANGUAGE OverloadedStrings #-}
module GSA.Printer
(regPrinter, operationPrinter, instructionPrinter, codePrinter, functionPrinter, programPrinter)
where
import Data.IntMap.Strict (IntMap)
import qualified Data.IntMap.Strict as IMap
import Data.Map.Strict (Map)
import qualified Data.Map.Strict as Map
import Data.Text (Text)
import qualified Data.Text as T
import GSA.Types
tshow :: Show a => a -> Text
tshow = T.pack . show
parens :: Text -> Text
parens t = "(" <> t <> ")"
braces :: Text -> Text
braces t = "{" <> t <> "}"
sep :: Text -> [Text] -> Text
sep = T.intercalate
commaSep :: [Text] -> Text
commaSep = sep ", "
regPrinter :: Reg -> Text
regPrinter (Reg i) = "x" <> tshow i
operationPrinter :: Operation -> [Reg] -> Text
operationPrinter Omove [r1] = regPrinter r1
operationPrinter p _ = error $ "Operation printing not implemented: " <> show p
instructionPrinter :: Int -> Instruction -> Text
instructionPrinter i (Inop (Node n))
| i - 1 == n = " " <> tshow i <> ":\tnop"
| otherwise = " " <> tshow i <> ":\tgoto " <> tshow n
instructionPrinter i (Iop op args dest (Node n)) =
" " <> tshow i <> ":\t" <> regPrinter dest <> " = " <> operationPrinter op args <>
if i - 1 == n then "" else "goto " <> tshow n
instructionPrinter _ op = error $ "Instruction printing not implemented: " <> show op
codePrinter :: Code -> Text
codePrinter (Code c) = IMap.foldrWithKey f "" c
where
f k a b = b <> instructionPrinter k a <> "\n"
functionPrinter :: Text -> Function -> Text
functionPrinter n f = n
<> parens (commaSep $ regPrinter <$> fnParams f) <> " "
<> braces ("\n" <> codePrinter (fnCode f))
programPrinter :: Program -> Text
programPrinter (Program p) = Map.foldrWithKey f "" p
where
f k a b = b <> functionPrinter k a <> "\n\n"
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