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|
{-|
Module : VeriFuzz.Graph.Random
Description : Code generation directly from DAG.
Copyright : (c) 2018-2019, Yann Herklotz Grave
License : BSD-3
Maintainer : ymherklotz [at] gmail [dot] com
Stability : experimental
Portability : POSIX
Define the code generation directly from the random DAG.
-}
module VeriFuzz.Graph.CodeGen
( generate
)
where
import Data.Foldable ( fold )
import Data.Graph.Inductive ( Graph
, LNode
, Node
, labNodes
, pre
)
import Data.Maybe ( fromMaybe )
import Data.Text ( Text )
import qualified Data.Text as T
import VeriFuzz.Circuit
import VeriFuzz.Internal.Gen
import VeriFuzz.Internal.Shared
toOperator :: Gate -> Text
toOperator And = " & "
toOperator Or = " | "
toOperator Xor = " ^ "
statList :: Gate -> [Node] -> Maybe Text
statList g n = toStr <$> safe tail n where toStr = fold . fmap ((<> toOperator g) . fromNode)
lastEl :: [Node] -> Maybe Text
lastEl n = fromNode <$> safe head n
toStmnt :: (Graph gr) => gr Gate e -> LNode Gate -> Text
toStmnt graph (n, g) =
fromMaybe T.empty
$ Just " assign "
<> Just (fromNode n)
<> Just " = "
<> statList g nodeL
<> lastEl nodeL
<> Just ";\n"
where nodeL = pre graph n
generate :: (Graph gr) => gr Gate e -> Text
generate graph =
"module generated_module(\n"
<> fold (imap " input wire " ",\n" inp)
<> T.intercalate ",\n" (imap " output wire " "" out)
<> ");\n"
<> fold (toStmnt graph <$> labNodes graph)
<> "endmodule\n\nmodule main;\n initial\n begin\n "
<> "$display(\"Hello, world\");\n $finish;\n "
<> "end\nendmodule"
where
inp = inputs graph
out = outputs graph
imap b e = fmap ((\s -> b <> s <> e) . fromNode)
|
