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{-|
Module      : Verismith.Tool.XST
Description : XST (ise) simulator implementation.
Copyright   : (c) 2018-2019, Yann Herklotz
License     : GPL-3
Maintainer  : yann [at] yannherklotz [dot] com
Stability   : experimental
Portability : POSIX

XST (ise) simulator implementation.
-}

{-# LANGUAGE QuasiQuotes #-}

module Verismith.Tool.XST
    ( XST(..)
    , defaultXST
    )
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.Tool.Template
import           Verismith.Verilog.AST
import           Verismith.Verilog.CodeGen

data XST = XST { xstBin    :: !(Maybe FilePath)
               , xstDesc   :: !Text
               , xstOutput :: !FilePath
               }
         deriving (Eq)

instance Tool XST where
    toText (XST _ t _) = t

instance Show XST where
    show t = unpack $ toText t

instance Synthesiser XST where
    runSynth = runSynthXST
    synthOutput = xstOutput
    setSynthOutput (XST a b _) = XST a b

instance NFData XST where
    rnf = rwhnf

defaultXST :: XST
defaultXST = XST Nothing "xst" "syn_xst.v"

runSynthXST :: Show ann => XST -> (SourceInfo ann) -> ResultSh ()
runSynthXST sim (SourceInfo top src) = do
    dir <- liftSh pwd
    let exec n = execute_
            SynthFail
            dir
            "xst"
            (maybe (fromText n) (</> fromText n) $ xstBin sim)
    liftSh $ do
        writefile xstFile $ xstSynthConfig top
        writefile prjFile "verilog work \"rtl.v\""
        writefile "rtl.v" $ genSource src
    exec "xst" ["-ifn", toTextIgnore xstFile]
    exec
        "netgen"
        [ "-w"
        , "-ofmt"
        , "verilog"
        , toTextIgnore $ modFile <.> "ngc"
        , toTextIgnore $ synthOutput sim
        ]
    liftSh . noPrint $ run_
        "sed"
        [ "-i"
        , "/^`ifndef/,/^`endif/ d; s/ *Timestamp: .*//;"
        , toTextIgnore $ synthOutput sim
        ]
  where
    modFile = fromText top
    xstFile = modFile <.> "xst"
    prjFile = modFile <.> "prj"