65 lines
1.7 KiB
Haskell
65 lines
1.7 KiB
Haskell
package TagEngine() where
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import Vector
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import Util
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#define UIntLog2N(n) (UInt (TLog n))
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data Tag numTags
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= Next UIntLog2N(numTags)
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| Tail
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deriving (Bits, Eq, FShow)
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initTagNext :: Integer -> Module(Reg (Tag numTags))
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initTagNext i = do
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t :: Reg (Tag numTags)
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t <- mkReg (Next (fromInteger i))
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return t
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initTagTail :: Module(Reg (Tag numTags))
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initTagTail = do
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t :: Reg (Tag numTags)
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t <- mkReg Tail
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return t
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interface (TagEngine :: # -> *) numTags =
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requestTag :: ActionValue UIntLog2N(numTags)
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retireTag :: UIntLog2N(numTags) -> Action
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initTagVec :: Module(Vector numTags (Reg (Tag numTags)))
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initTagVec =
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do
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tagVecSequential :: Vector numTags (Reg (Tag numTags))
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tagVecSequential <- mapM (\idx -> initTagNext (idx+1)) genVector
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let idxLast :: Integer = (fromInteger |> valueOf numTags) - 1
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tailTag <- initTagTail
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-- the tail of our TagVec should be `Tail` not `Next`
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let finalTagVec = update tagVecSequential idxLast tailTag
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return finalTagVec
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mkTagEngine :: Module (TagEngine numTags)
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mkTagEngine =
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do
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tagVec :: Vector numTags (Reg (Tag numTags))
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tagVec <- initTagVec
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counter <- mkReg(0 :: UIntLog2N(numTags))
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return $
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interface TagEngine
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requestTag :: ActionValue UIntLog2N(numTags)
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requestTag = do
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-- placeholder
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counter := counter + 1
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return counter
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retireTag :: UIntLog2N(numTags) -> Action
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retireTag tag = do
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-- placeholder
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counter := 0
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where
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a = "Hello"
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idx_last :: Integer = (fromInteger |> valueOf numTags) - 1
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a :: Integer
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a = 3
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