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authorYann Herklotz <git@yannherklotz.com>2019-10-29 12:06:05 +0000
committerYann Herklotz <git@yannherklotz.com>2019-10-29 12:06:05 +0000
commit4ee6646b8a78d4c20fe0b89d95f23d382e1c47fc (patch)
tree9b02e1b92f8abf0baf3dc108ab7f4fb8f33e753a /src/VeriFuzz/Circuit/Gen.hs
parent1aaff80235237507572e0fb4be86f34cb1829b68 (diff)
parent01c2ab3f6a58d416528efce3057e2cf2f1604489 (diff)
downloadverismith-feature/nondeterminism.tar.gz
verismith-feature/nondeterminism.zip
Merge branch 'master' into HEADfeature/nondeterminism
Diffstat (limited to 'src/VeriFuzz/Circuit/Gen.hs')
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diff --git a/src/VeriFuzz/Circuit/Gen.hs b/src/VeriFuzz/Circuit/Gen.hs
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-{-|
-Module : Verilog.Circuit.Gen
-Description : Generate verilog from circuit.
-Copyright : (c) 2019, Yann Herklotz Grave
-License : GPL-3
-Maintainer : yann [at] yannherklotz [dot] com
-Stability : experimental
-Portability : POSIX
-
-Generate verilog from circuit.
--}
-
-module VeriFuzz.Circuit.Gen
- ( generateAST
- )
-where
-
-import Data.Graph.Inductive (LNode, Node)
-import qualified Data.Graph.Inductive as G
-import Data.Maybe (catMaybes)
-import VeriFuzz.Circuit.Base
-import VeriFuzz.Circuit.Internal
-import VeriFuzz.Verilog.AST
-import VeriFuzz.Verilog.Mutate
-
--- | Converts a 'CNode' to an 'Identifier'.
-frNode :: Node -> Identifier
-frNode = Identifier . fromNode
-
--- | Converts a 'Gate' to a 'BinaryOperator', which should be a bijective
--- mapping.
-fromGate :: Gate -> BinaryOperator
-fromGate And = BinAnd
-fromGate Or = BinOr
-fromGate Xor = BinXor
-
-inputsC :: Circuit -> [Node]
-inputsC c = inputs (getCircuit c)
-
-genPortsAST :: (Circuit -> [Node]) -> Circuit -> [Port]
-genPortsAST f c = port . frNode <$> f c where port = Port Wire False 4
-
--- | Generates the nested expression AST, so that it can then generate the
--- assignment expressions.
-genAssignExpr :: Gate -> [Node] -> Maybe Expr
-genAssignExpr _ [] = Nothing
-genAssignExpr _ [n ] = Just . Id $ frNode n
-genAssignExpr g (n : ns) = BinOp wire oper <$> genAssignExpr g ns
- where
- wire = Id $ frNode n
- oper = fromGate g
-
--- | Generate the continuous assignment AST for a particular node. If it does
--- not have any nodes that link to it then return 'Nothing', as that means that
--- the assignment will just be empty.
-genContAssignAST :: Circuit -> LNode Gate -> Maybe ModItem
-genContAssignAST c (n, g) = ModCA . ContAssign name <$> genAssignExpr g nodes
- where
- gr = getCircuit c
- nodes = G.pre gr n
- name = frNode n
-
-genAssignAST :: Circuit -> [ModItem]
-genAssignAST c = catMaybes $ genContAssignAST c <$> nodes
- where
- gr = getCircuit c
- nodes = G.labNodes gr
-
-genModuleDeclAST :: Circuit -> ModDecl
-genModuleDeclAST c = ModDecl i output ports (combineAssigns yPort a) []
- where
- i = Identifier "gen_module"
- ports = genPortsAST inputsC c
- output = []
- a = genAssignAST c
- yPort = Port Wire False 90 "y"
-
-generateAST :: Circuit -> Verilog
-generateAST c = Verilog [genModuleDeclAST c]