Moved to new GHC API (6.11). Also use vhdl package for the VHDL AST

[matthijs/master-project/cλash.git] / VHDL.hs

diff --git a/VHDL.hs b/VHDL.hs
index 6039447a55f5eb57097fa23b4fffc01d7cbee22a..1a8f39420e08267fde679ff6bff257d9a545e810 100644 (file)
--- a/VHDL.hs
+++ b/VHDL.hs
@@ -16,7 +16,7 @@ import Data.Accessor.MonadState as MonadState
 import Debug.Trace
 
 -- ForSyDe
-import qualified ForSyDe.Backend.VHDL.AST as AST
+import qualified Language.VHDL.AST as AST
 
 -- GHC API
 import CoreSyn
@@ -254,13 +254,11 @@ mkConcSm ::
 -- the type works out.
 mkConcSm (bndr, Cast expr ty) = mkConcSm (bndr, expr)
 
--- For simple a = b assignments, just generate an unconditional signal
--- assignment. This should only happen for dataconstructors without arguments.
--- TODO: Integrate this with the below code for application (essentially this
--- is an application without arguments)
+-- Simple a = b assignments are just like applications, but without arguments.
+-- We can't just generate an unconditional assignment here, since b might be a
+-- top level binding (e.g., a function with no arguments).
 mkConcSm (bndr, Var v) = do
-  ty_state <- getA vsType
-  return $ [mkUncondAssign (Left bndr) ((varToVHDLExpr ty_state) v)]
+  genApplication (Left bndr) v []
 
 mkConcSm (bndr, app@(CoreSyn.App _ _))= do
   let (CoreSyn.Var f, args) = CoreSyn.collectArgs app
@@ -288,14 +286,13 @@ mkConcSm (bndr, expr@(Case (Var scrut) b ty [alt])) =
 -- binders in the alts and only variables in the case values and a variable
 -- for a scrutinee. We check the constructor of the second alt, since the
 -- first is the default case, if there is any.
-mkConcSm (bndr, (Case (Var scrut) b ty [(_, _, Var false), (con, _, Var true)])) = do {
-  ; ty_state <- getA vsType
-  ; let { cond_expr = (varToVHDLExpr ty_state scrut) AST.:=: (altconToVHDLExpr con)
-        ; true_expr  = (varToVHDLExpr ty_state true)
-        ; false_expr  = (varToVHDLExpr ty_state false)
-        } ;
-  ; return [mkCondAssign (Left bndr) cond_expr true_expr false_expr]
-  }
+mkConcSm (bndr, (Case (Var scrut) b ty [(_, _, Var false), (con, _, Var true)])) = do
+  scrut' <- MonadState.lift vsType $ varToVHDLExpr scrut
+  let cond_expr = scrut' AST.:=: (altconToVHDLExpr con)
+  true_expr <- MonadState.lift vsType $ varToVHDLExpr true
+  false_expr <- MonadState.lift vsType $ varToVHDLExpr false
+  return [mkCondAssign (Left bndr) cond_expr true_expr false_expr]
+
 mkConcSm (_, (Case (Var _) _ _ alts)) = error "\nVHDL.mkConcSm: Not in normal form: Case statement with more than two alternatives"
 mkConcSm (_, Case _ _ _ _) = error "\nVHDL.mkConcSm: Not in normal form: Case statement has does not have a simple variable as scrutinee"
 mkConcSm (bndr, expr) = error $ "\nVHDL.mkConcSM: Unsupported binding in let expression: " ++ pprString bndr ++ " = " ++ pprString expr