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|
{-|
Module : VeriFuzz.Gen
Description : Various useful generators.
Copyright : (c) 2019, Yann Herklotz Grave
License : GPL-3
Maintainer : ymherklotz [at] gmail [dot] com
Stability : experimental
Portability : POSIX
Various useful generators.
-}
module VeriFuzz.Gen where
import Control.Lens
import Data.Foldable (fold)
import qualified Data.Text as T
import Test.QuickCheck (Gen)
import qualified Test.QuickCheck as QC
import VeriFuzz.AST
import VeriFuzz.ASTGen
import VeriFuzz.Internal
import VeriFuzz.Mutate
import VeriFuzz.Random
toId :: Int -> Identifier
toId = Identifier . ("w" <>) . T.pack . show
toPort :: Identifier -> Gen Port
toPort ident = do
i <- abs <$> QC.arbitrary
return $ wire i ident
sumSize :: [Port] -> Int
sumSize ports = sum $ ports ^.. traverse . portSize
random :: [Identifier] -> (Expr -> ContAssign) -> Gen ModItem
random ctx fun = do
expr <- QC.sized (exprWithContext ctx)
return . ModCA $ fun expr
randomAssigns :: [Identifier] -> [Gen ModItem]
randomAssigns ids = random ids . ContAssign <$> ids
randomOrdAssigns :: [Identifier] -> [Identifier] -> [Gen ModItem]
randomOrdAssigns inp ids = snd $ foldr gen (inp, []) ids
where gen cid (i, o) = (cid : i, random i (ContAssign cid) : o)
randomMod :: Int -> Int -> Gen ModDecl
randomMod inps total = do
x <- sequence $ randomOrdAssigns start end
ident <- sequence $ toPort <$> ids
let inputs_ = take inps ident
let other = drop inps ident
let y = ModCA . ContAssign "y" . fold $ Id <$> drop inps ids
let yport = [wire (sumSize other) "y"]
return
. initMod
. declareMod other
. ModDecl "test_module" yport inputs_
$ x
++ [y]
where
ids = toId <$> [1 .. total]
end = drop inps ids
start = take inps ids
fromGraph :: Gen ModDecl
fromGraph = do
gr <- rDupsCirc <$> QC.resize 100 randomCircuit
return
$ initMod
. head
$ nestUpTo 5 (generateAST gr)
^.. getVerilogSrc
. traverse
. getDescription
|
