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module AccessOps (byteArrayAccessOps, addrAccessOps) where
import Syntax
data ElementType = MkElementType
{ elt_name :: String
, elt_rep_ty :: Ty
, elt_desc :: String
, elt_width :: Maybe Int
}
machWord :: Maybe Int
machWord = Nothing
strToTy :: String -> Ty
strToTy s = TyApp (TyCon s) []
elementTypes :: [ElementType]
elementTypes =
[ MkElementType "Char" (strToTy "Char#" ) "an 8-bit character" (Just 1)
, MkElementType "WideChar" (strToTy "Char#" ) "a 32-bit character" (Just 4)
, MkElementType "Int" (strToTy "Int#" ) "a word-sized integer" machWord
, MkElementType "Word" (strToTy "Word#" ) "a word-sized unsigned integer" machWord
, MkElementType "Addr" (strToTy "Addr#" ) "a machine address" machWord
, MkElementType "Float" (strToTy "Float#" ) "a single-precision floating-point value" (Just 4)
, MkElementType "Double" (strToTy "Double#") "a double-precision floating-point value" (Just 8)
, MkElementType "StablePtr" (TyApp (TyCon "StablePtr#") [TyVar "a"])
"a 'StablePtr#' value" machWord
] ++ do
n <- [8, 16, 32, 64]
let mkDesc suff = (if n == 8 then "an " else "a ") ++ shows n suff
[ MkElementType
{ elt_name = "Int" ++ show n
, elt_rep_ty = strToTy $ "Int" ++ shows n "#"
, elt_desc = mkDesc "-bit signed integer"
, elt_width = Just (n `quot` 8)
},
MkElementType
{ elt_name = "Word" ++ show n
, elt_rep_ty = strToTy $ "Word" ++ shows n "#"
, elt_desc = mkDesc "-bit unsigned integer"
, elt_width = Just (n `quot` 8)
}
]
unalignedElementTypes :: [ElementType]
unalignedElementTypes
= filter (\e -> elt_name e `notElem` ["Int8", "Word8"]) elementTypes
--unalignedElementTypes = filter (\e -> elt_width e /= Just 1) elementTypes
prettyOffset :: ElementType -> String
prettyOffset e = case elt_width e of
Nothing -> "machine words"
Just 1 -> "bytes"
Just n -> shows n "-byte words"
getAlignWarn :: ElementType -> String
getAlignWarn e = case elt_width e of
Just 1 -> ""
_ -> "On some platforms, the access may fail\n"
++ "for an insufficiently aligned @Addr#@."
mutableByteArrayS :: Ty
mutableByteArrayS = TyApp (TyCon "MutableByteArray#") [TyVar "s"]
stateS :: Ty
stateS = TyApp (TyCon "State#") [TyVar "s"]
readResTy :: ElementType -> Ty
readResTy e = TyF stateS (TyUTup [stateS, elt_rep_ty e])
writeResTy :: ElementType -> Ty
writeResTy e = TyF (elt_rep_ty e) (TyF stateS stateS)
mkIndexByteArrayOp :: ElementType -> Entry
mkIndexByteArrayOp e = PrimOpSpec
{ cons = "IndexByteArrayOp_" ++ elt_name e
, name = "index" ++ elt_name e ++ "Array#"
, ty = TyF (strToTy "ByteArray#")
$ TyF (strToTy "Int#")
(elt_rep_ty e)
, cat = GenPrimOp
, desc = "Read " ++ elt_desc e ++ "; offset in " ++ prettyOffset e ++ "."
, opts = [OptionEffect CanFail]
}
mkUnalignedIndexByteArrayOp :: ElementType -> Entry
mkUnalignedIndexByteArrayOp e = PrimOpSpec
{ cons = "IndexByteArrayOp_Word8As" ++ elt_name e
, name = "indexWord8ArrayAs" ++ elt_name e ++ "#"
, ty = TyF (strToTy "ByteArray#")
$ TyF (strToTy "Int#")
(elt_rep_ty e)
, cat = GenPrimOp
, desc = "Read " ++ elt_desc e ++ "; offset in bytes."
, opts = [OptionEffect CanFail]
}
mkReadByteArrayOp :: ElementType -> Entry
mkReadByteArrayOp e = PrimOpSpec
{ cons = "ReadByteArrayOp_" ++ elt_name e
, name = "read" ++ elt_name e ++ "Array#"
, ty = TyF mutableByteArrayS
$ TyF (strToTy "Int#")
$ readResTy e
, cat = GenPrimOp
, desc = "Read " ++ elt_desc e ++ "; offset in " ++ prettyOffset e ++ "."
, opts = [OptionEffect ReadWriteEffect, OptionCanFailWarnFlag YesWarnCanFail]
}
mkUnalignedReadByteArrayOp :: ElementType -> Entry
mkUnalignedReadByteArrayOp e = PrimOpSpec
{ cons = "ReadByteArrayOp_Word8As" ++ elt_name e
, name = "readWord8ArrayAs" ++ elt_name e ++ "#"
, ty = TyF mutableByteArrayS
$ TyF (strToTy "Int#")
$ readResTy e
, cat = GenPrimOp
, desc = "Read " ++ elt_desc e ++ "; offset in bytes."
, opts = [OptionEffect ReadWriteEffect, OptionCanFailWarnFlag YesWarnCanFail]
}
mkWriteByteArrayOp :: ElementType -> Entry
mkWriteByteArrayOp e = PrimOpSpec
{ cons = "WriteByteArrayOp_" ++ elt_name e
, name = "write" ++ elt_name e ++ "Array#"
, ty = TyF mutableByteArrayS
$ TyF (strToTy "Int#")
$ writeResTy e
, cat = GenPrimOp
, desc = "Write " ++ elt_desc e ++ "; offset in " ++ prettyOffset e ++ "."
, opts = [OptionEffect ReadWriteEffect, OptionCanFailWarnFlag YesWarnCanFail]
}
mkUnalignedWriteByteArrayOp :: ElementType -> Entry
mkUnalignedWriteByteArrayOp e = PrimOpSpec
{ cons = "WriteByteArrayOp_Word8As" ++ elt_name e
, name = "writeWord8ArrayAs" ++ elt_name e ++ "#"
, ty = TyF mutableByteArrayS
$ TyF (strToTy "Int#")
$ writeResTy e
, cat = GenPrimOp
, desc = "Write " ++ elt_desc e ++ "; offset in bytes."
, opts = [OptionEffect ReadWriteEffect, OptionCanFailWarnFlag YesWarnCanFail]
}
byteArrayAccessOps :: [Entry]
byteArrayAccessOps
= map mkIndexByteArrayOp elementTypes
++ map mkUnalignedIndexByteArrayOp unalignedElementTypes
++ map mkReadByteArrayOp elementTypes
++ map mkUnalignedReadByteArrayOp unalignedElementTypes
++ map mkWriteByteArrayOp elementTypes
++ map mkUnalignedWriteByteArrayOp unalignedElementTypes
mkIndexOffAddrOp :: ElementType -> Entry
mkIndexOffAddrOp e = PrimOpSpec
{ cons = "IndexOffAddrOp_" ++ elt_name e
, name = "index" ++ elt_name e ++ "OffAddr#"
, ty = TyF (strToTy "Addr#")
$ TyF (strToTy "Int#")
(elt_rep_ty e)
, cat = GenPrimOp
, desc = "Read " ++ elt_desc e ++ "; offset in " ++ prettyOffset e ++ ".\n\n"
++ getAlignWarn e
, opts = [OptionEffect CanFail]
}
mkUnalignedIndexOffAddrOp :: ElementType -> Entry
mkUnalignedIndexOffAddrOp e = PrimOpSpec
{ cons = "IndexOffAddrOp_Word8As" ++ elt_name e
, name = "indexWord8OffAddrAs" ++ elt_name e ++ "#"
, ty = TyF (strToTy "Addr#")
$ TyF (strToTy "Int#")
(elt_rep_ty e)
, cat = GenPrimOp
, desc = "Read " ++ elt_desc e ++ "; offset in bytes."
, opts = [OptionEffect CanFail]
}
mkReadOffAddrOp :: ElementType -> Entry
mkReadOffAddrOp e = PrimOpSpec
{ cons = "ReadOffAddrOp_" ++ elt_name e
, name = "read" ++ elt_name e ++ "OffAddr#"
, ty = TyF (strToTy "Addr#")
$ TyF (strToTy "Int#")
$ readResTy e
, cat = GenPrimOp
, desc = "Read " ++ elt_desc e ++ "; offset in " ++ prettyOffset e ++ ".\n\n"
++ getAlignWarn e
, opts = [OptionEffect ReadWriteEffect, OptionCanFailWarnFlag YesWarnCanFail]
}
mkUnalignedReadOffAddrOp :: ElementType -> Entry
mkUnalignedReadOffAddrOp e = PrimOpSpec
{ cons = "ReadOffAddrOp_Word8As" ++ elt_name e
, name = "readWord8OffAddrAs" ++ elt_name e ++ "#"
, ty = TyF (strToTy "Addr#")
$ TyF (strToTy "Int#")
$ readResTy e
, cat = GenPrimOp
, desc = "Read " ++ elt_desc e ++ "; offset in bytes."
, opts = [OptionEffect ReadWriteEffect, OptionCanFailWarnFlag YesWarnCanFail]
}
mkWriteOffAddrOp :: ElementType -> Entry
mkWriteOffAddrOp e = PrimOpSpec
{ cons = "WriteOffAddrOp_" ++ elt_name e
, name = "write" ++ elt_name e ++ "OffAddr#"
, ty = TyF (strToTy "Addr#")
$ TyF (strToTy "Int#")
$ writeResTy e
, cat = GenPrimOp
, desc = "Write " ++ elt_desc e ++ "; offset in " ++ prettyOffset e ++ ".\n\n"
++ getAlignWarn e
, opts = [OptionEffect ReadWriteEffect, OptionCanFailWarnFlag YesWarnCanFail]
}
mkUnalignedWriteOffAddrOp :: ElementType -> Entry
mkUnalignedWriteOffAddrOp e = PrimOpSpec
{ cons = "WriteOffAddrOp_Word8As" ++ elt_name e
, name = "writeWord8OffAddrAs" ++ elt_name e ++ "#"
, ty = TyF (strToTy "Addr#")
$ TyF (strToTy "Int#")
$ writeResTy e
, cat = GenPrimOp
, desc = "Write " ++ elt_desc e ++ "; offset in bytes."
, opts = [OptionEffect ReadWriteEffect, OptionCanFailWarnFlag YesWarnCanFail]
}
addrAccessOps :: [Entry]
addrAccessOps
= map mkIndexOffAddrOp elementTypes
++ map mkUnalignedIndexOffAddrOp unalignedElementTypes
++ map mkReadOffAddrOp elementTypes
++ map mkUnalignedReadOffAddrOp unalignedElementTypes
++ map mkWriteOffAddrOp elementTypes
++ map mkUnalignedWriteOffAddrOp unalignedElementTypes
|
