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diff --git a/src/Verismith/Tool/Quartus.hs b/src/Verismith/Tool/Quartus.hs
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+{-|
+Module      : Verismith.Tool.Quartus
+Description : Quartus synthesiser implementation.
+Copyright   : (c) 2019, Yann Herklotz Grave
+License     : GPL-3
+Maintainer  : yann [at] yannherklotz [dot] com
+Stability   : experimental
+Portability : POSIX
+
+Quartus synthesiser implementation.
+-}
+
+module Verismith.Tool.Quartus
+    ( Quartus(..)
+    , defaultQuartus
+    )
+where
+
+import           Control.DeepSeq           (NFData, rnf, rwhnf)
+import           Data.Text                 (Text, unpack)
+import           Prelude                   hiding (FilePath)
+import           Shelly
+import           Shelly.Lifted             (liftSh)
+import           Verismith.Tool.Internal
+import           Verismith.Verilog.AST
+import           Verismith.Verilog.CodeGen
+
+data Quartus = Quartus { quartusBin    :: !(Maybe FilePath)
+                       , quartusDesc   :: {-# UNPACK #-} !Text
+                       , quartusOutput :: {-# UNPACK #-} !FilePath
+                       }
+                deriving (Eq)
+
+instance Tool Quartus where
+    toText (Quartus _ t _) = t
+
+instance Show Quartus where
+    show t = unpack $ toText t
+
+instance Synthesiser Quartus where
+    runSynth = runSynthQuartus
+    synthOutput = quartusOutput
+    setSynthOutput (Quartus a b _) = Quartus a b
+
+instance NFData Quartus where
+    rnf = rwhnf
+
+defaultQuartus :: Quartus
+defaultQuartus = Quartus Nothing "quartus" "syn_quartus.v"
+
+runSynthQuartus :: Quartus -> SourceInfo -> ResultSh ()
+runSynthQuartus sim (SourceInfo top src) = do
+    dir <- liftSh pwd
+    let ex = execute_ SynthFail dir "quartus"
+    liftSh . writefile inpf $ genSource src
+    liftSh . noPrint $ run_
+        "sed"
+        [ "-i"
+        , "s/^module/(* multstyle = \"logic\" *) module/;"
+        , toTextIgnore inpf
+        ]
+    ex (exec "quartus_map")
+       [top, "--source=" <> toTextIgnore inpf, "--family=Cyclone V"]
+    ex (exec "quartus_fit") [top, "--part=5CGXFC7D6F31C6"]
+    ex (exec "quartus_eda") [top, "--simulation", "--tool=vcs"]
+    liftSh $ do
+        cp (fromText "simulation/vcs" </> fromText top <.> "vo")
+            $ synthOutput sim
+        run_
+            "sed"
+            [ "-ri"
+            , "s,^// DATE.*,,; s,^tri1 (.*);,wire \\1 = 1;,; /^\\/\\/ +synopsys/ d;"
+            , toTextIgnore $ synthOutput sim
+            ]
+  where
+    inpf = "rtl.v"
+    exec s = maybe (fromText s) (</> fromText s) $ quartusBin sim