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63 lines
2.5 KiB
Haskell
63 lines
2.5 KiB
Haskell
module PGF.ByteCode(CodeLabel, Instr(..), ppCode, ppInstr) where
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import PGF.CId
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import Text.PrettyPrint
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type CodeLabel = Int
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data Instr
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= ENTER
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| EVAL_ARG_VAR {-# UNPACK #-} !Int
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| EVAL_FREE_VAR {-# UNPACK #-} !Int
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| CASE CId {-# UNPACK #-} !CodeLabel
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| CASE_INT Int {-# UNPACK #-} !CodeLabel
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| CASE_STR String {-# UNPACK #-} !CodeLabel
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| CASE_FLT Double {-# UNPACK #-} !CodeLabel
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| ALLOC {-# UNPACK #-} !Int
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| PUT_CONSTR CId
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| PUT_FUN CId
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| PUT_CLOSURE {-# UNPACK #-} !CodeLabel
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| PUT_INT {-# UNPACK #-} !Int
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| PUT_STR String
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| PUT_FLT {-# UNPACK #-} !Double
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| SET_VALUE {-# UNPACK #-} !Int
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| SET_ARG_VAR {-# UNPACK #-} !Int
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| SET_FREE_VAR {-# UNPACK #-} !Int
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| PUSH_VALUE {-# UNPACK #-} !Int
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| PUSH_ARG_VAR {-# UNPACK #-} !Int
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| PUSH_FREE_VAR {-# UNPACK #-} !Int
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| TAIL_CALL CId
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| UPDATE
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| FAIL
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| RET {-# UNPACK #-} !Int
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ppCode :: Int -> [[Instr]] -> Doc
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ppCode l [] = empty
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ppCode l (is:iss) = ppLabel l <+> vcat (map ppInstr is) $$ ppCode (l+1) iss
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ppInstr (ENTER ) = text "ENTER"
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ppInstr (EVAL_ARG_VAR n) = text "EVAL_ARG_VAR " <+> int n
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ppInstr (EVAL_FREE_VAR n) = text "EVAL_FREE_VAR" <+> int n
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ppInstr (CASE id l ) = text "CASE " <+> ppCId id <+> ppLabel l
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ppInstr (CASE_INT n l ) = text "CASE_INT " <+> int n <+> ppLabel l
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ppInstr (CASE_STR str l ) = text "CASE_STR " <+> text (show str) <+> ppLabel l
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ppInstr (CASE_FLT d l ) = text "CASE_FLT " <+> double d <+> ppLabel l
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ppInstr (ALLOC n) = text "ALLOC " <+> int n
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ppInstr (PUT_CONSTR id) = text "PUT_CONSTR " <+> ppCId id
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ppInstr (PUT_FUN id) = text "PUT_FUN " <+> ppCId id
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ppInstr (PUT_CLOSURE l) = text "PUT_CLOSURE " <+> ppLabel l
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ppInstr (PUT_INT n ) = text "PUT_INT " <+> int n
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ppInstr (PUT_STR str ) = text "PUT_STR " <+> text (show str)
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ppInstr (PUT_FLT d ) = text "PUT_FLT " <+> double d
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ppInstr (SET_VALUE n) = text "SET_VALUE " <+> int n
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ppInstr (SET_ARG_VAR n) = text "SET_ARG_VAR " <+> int n
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ppInstr (SET_FREE_VAR n) = text "SET_FREE_VAR " <+> int n
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ppInstr (PUSH_VALUE n) = text "PUSH_VALUE " <+> int n
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ppInstr (PUSH_ARG_VAR n) = text "PUSH_ARG_VAR " <+> int n
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ppInstr (PUSH_FREE_VAR n) = text "PUSH_FREE_VAR" <+> int n
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ppInstr (TAIL_CALL id) = text "TAIL_CALL " <+> ppCId id
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ppInstr (FAIL ) = text "FAIL"
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ppInstr (RET n) = text "RET " <+> int n
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ppLabel l = text (let s = show l in replicate (3-length s) '0' ++ s)
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