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|
{-|
Module : VeriFuzz.Sim.Icarus
Description : Icarus verilog module.
Copyright : (c) 2018-2019, Yann Herklotz
License : BSD-3
Maintainer : ymherklotz [at] gmail [dot] com
Stability : experimental
Portability : POSIX
Icarus verilog module.
-}
module VeriFuzz.Sim.Icarus
( Icarus(..)
, defaultIcarus
, runSimIc
)
where
import Control.DeepSeq ( NFData
, rnf
, rwhnf
)
import Control.Lens
import Control.Monad ( void )
import Crypto.Hash ( Digest
, hash
)
import Crypto.Hash.Algorithms ( SHA256 )
import Data.Binary ( encode )
import Data.Bits
import qualified Data.ByteArray as BA
( convert )
import Data.ByteString ( ByteString )
import qualified Data.ByteString as B
import Data.ByteString.Lazy ( toStrict )
import qualified Data.ByteString.Lazy as L
( ByteString )
import Data.Char ( digitToInt )
import Data.Foldable ( fold )
import Data.List ( transpose )
import Data.Maybe ( listToMaybe )
import Data.Text ( Text )
import qualified Data.Text as T
import Numeric ( readInt )
import Prelude hiding ( FilePath )
import Shelly
import Shelly.Lifted ( liftSh )
import VeriFuzz.Sim.Internal
import VeriFuzz.Sim.Template
import VeriFuzz.Verilog.AST
import VeriFuzz.Verilog.BitVec
import VeriFuzz.Verilog.CodeGen
import VeriFuzz.Verilog.Internal
import VeriFuzz.Verilog.Mutate
data Icarus = Icarus { icarusPath :: FilePath
, vvpPath :: FilePath
}
deriving (Eq)
instance Show Icarus where
show _ = "iverilog"
instance Tool Icarus where
toText _ = "iverilog"
instance Simulator Icarus where
runSim = runSimIcarus
runSimWithFile = runSimIcarusWithFile
instance NFData Icarus where
rnf = rwhnf
defaultIcarus :: Icarus
defaultIcarus = Icarus "iverilog" "vvp"
addDisplay :: [Statement] -> [Statement]
addDisplay s = concat $ transpose
[ s
, replicate l $ TimeCtrl 1 Nothing
, replicate l . SysTaskEnable $ Task "display" ["%b", Id "y"]
]
where l = length s
assignFunc :: [Port] -> ByteString -> Statement
assignFunc inp bs =
NonBlockAssign
. Assign conc Nothing
. Number
. BitVec (B.length bs * 8)
$ bsToI bs
where conc = RegConcat (portToExpr <$> inp)
convert :: Text -> ByteString
convert =
toStrict
. (encode :: Integer -> L.ByteString)
. maybe 0 fst
. listToMaybe
. readInt 2 (`elem` ("01" :: String)) digitToInt
. T.unpack
mask :: Text -> Text
mask = T.replace "x" "0"
callback :: ByteString -> Text -> ByteString
callback b t = b <> convert (mask t)
runSimIcarus :: Icarus -> SourceInfo -> [ByteString] -> ResultSh ByteString
runSimIcarus sim rinfo bss = do
let tb = ModDecl
"main"
[]
[]
[ Initial
$ fold (addDisplay $ assignFunc (_modInPorts m) <$> bss)
<> (SysTaskEnable $ Task "finish" [])
]
[]
let newtb = instantiateMod m tb
let modWithTb = Verilog [newtb, m]
liftSh . writefile "main.v" $ genSource modWithTb
annotate SimFail $ runSimWithFile sim "main.v" bss
where m = rinfo ^. mainModule
runSimIcarusWithFile
:: Icarus -> FilePath -> [ByteString] -> ResultSh ByteString
runSimIcarusWithFile sim f _ = annotate SimFail . liftSh $ do
dir <- pwd
logCommand_ dir "icarus"
$ run (icarusPath sim) ["-o", "main", toTextIgnore f]
B.take 8 . BA.convert . (hash :: ByteString -> Digest SHA256) <$> logCommand
dir
"vvp"
(runFoldLines (mempty :: ByteString) callback (vvpPath sim) ["main"])
fromBytes :: ByteString -> Integer
fromBytes = B.foldl' f 0 where f a b = a `shiftL` 8 .|. fromIntegral b
runSimIc
:: (Synthesiser b)
=> Icarus
-> b
-> SourceInfo
-> [ByteString]
-> ResultSh ByteString
runSimIc sim1 synth1 srcInfo bss = do
dir <- liftSh pwd
let top = srcInfo ^. mainModule
let inConcat = (RegConcat (Id . fromPort <$> (top ^. modInPorts)))
let
tb = instantiateMod top $ ModDecl
"testbench"
[]
[]
[ Initial
$ fold
[ BlockAssign (Assign "clk" Nothing 0)
, BlockAssign (Assign inConcat Nothing 0)
]
<> fold
( (\r -> TimeCtrl
10
(Just $ BlockAssign (Assign inConcat Nothing r))
)
. fromInteger
. fromBytes
<$> bss
)
<> (SysTaskEnable $ Task "finish" [])
, Always . TimeCtrl 5 . Just $ BlockAssign
(Assign "clk" Nothing (UnOp UnNot (Id "clk")))
, Always . EventCtrl (EPosEdge "clk") . Just . SysTaskEnable $ Task
"strobe"
["%b", Id "y"]
]
[]
liftSh . writefile "testbench.v" $ icarusTestbench (Verilog [tb]) synth1
liftSh $ exe dir "icarus" "iverilog" ["-o", "main", "testbench.v"]
liftSh
$ B.take 8
. BA.convert
. (hash :: ByteString -> Digest SHA256)
<$> logCommand
dir
"vvp"
(runFoldLines (mempty :: ByteString)
callback
(vvpPath sim1)
["main"]
)
where
exe dir name e = void . errExit False . logCommand dir name . timeout e
|