Home My Page Projects Code Snippets Project Openings diderot
Summary Activity Tracker Tasks SCM

SCM Repository

[diderot] View of /branches/vis15/src/compiler/cxx-util/tree-to-cxx.sml
ViewVC logotype

View of /branches/vis15/src/compiler/cxx-util/tree-to-cxx.sml

Parent Directory Parent Directory | Revision Log Revision Log


Revision 3876 - (download) (annotate)
Wed May 18 17:25:47 2016 UTC (3 years, 2 months ago) by jhr
Original Path: branches/vis15/src/compiler/c-util/tree-to-cxx.sml
File size: 12000 byte(s)
  working on merge
(* tree-to-cxx.sml
 *
 * This code is part of the Diderot Project (http://diderot-language.cs.uchicago.edu)
 *
 * COPYRIGHT (c) 2016 The University of Chicago
 * All rights reserved.
 *
 * Translate TreeIR to the C++ version of CLang.
 *)


structure TreeToCxx : sig

    val trType : TreeTypes.t -> CLang.ty

    val trBlock : CodeGenEnv.t * TreeIR.block -> CLang.stm

    val trExp : CodeGenEnv.t * TreeIR.exp -> CLang.exp

  (* translate an expression to a variable form; return the variable (as an expression)
   * and the (optional) declaration.
   *)
    val trExpToVar : CodeGenEnv.t * CLang.ty * string * TreeIR.exp -> CLang.exp * CLang.stm list

    val trAssign : CodeGenEnv.t * CLang.exp * TreeIR.exp -> CLang.stm list

  end = struct

    structure CL = CLang
    structure IR = TreeIR
    structure Op = TreeOps
    structure Ty = TreeTypes
    structure V = TreeVar
    structure Env = CodeGenEnv

    datatype var = datatype CL.typed_var

  (* translate a local variable that occurs in an l-value context *)
    fun lvalueVar (env, x) = CL.mkVar(Env.lookup(env, x))
  (* translate a variable that occurs in an r-value context *)
    fun rvalueVar (env, x) = CL.mkVar(Env.lookup(env, x))

  (* translate a global variable that occurs in an l-value context *)
    fun lvalueGlobalVar (env, x) = CL.mkIndirect(CL.mkVar(Env.global env), TreeGlobalVar.name x)
  (* translate a global variable that occurs in an r-value context *)
    val rvalueGlobalVar = lvalueGlobalVar

  (* translate a strand state variable that occurs in an l-value context *)
    fun lvalueStateVar (env, x) = CL.mkIndirect(CL.mkVar(Env.selfOut env), TreeStateVar.name x)
  (* translate a strand state variable that occurs in an r-value context *)
    fun rvalueStateVar (env, x) = CL.mkIndirect(CL.mkVar(Env.selfIn env), TreeStateVar.name x)

  (* generate new variables *)
    local
      val count = ref 0
      fun freshName prefix = let
            val n = !count
            in
              count := n+1;
              concat[prefix, "_", Int.toString n]
            end
    in
    fun tmpVar () = freshName "tmp"
    fun freshVar prefix = freshName prefix
    end (* local *)

  (* integer literal expression *)
    fun intExp (i : int) = CL.mkInt(IntInf.fromInt i)

    fun addrOf e = CL.mkUnOp(CL.%&, e)

  (* make an application of a function from the "std" namespace *)
    fun mkStdApply (f, args) = CL.mkApply("std::" ^ f, args)

  (* make an application of a function from the "diderot" namespace *)
    fun mkDiderotApply (f, args) = CL.mkApply("diderot::" ^ f, args)
    fun mkDiderotCall (f, args) = CL.mkCall("diderot::" ^ f, args)

  (* Translate a TreeIR operator application to a CLang expression *)
    fun trOp (rator, args) = (case (rator, args)
	   of (Op.IAdd, [a, b]) => CL.mkBinOp(a, CL.#+, b)
	    | (Op.ISub, [a, b]) => CL.mkBinOp(a, CL.#-, b)
	    | (Op.IMul, [a, b]) => CL.mkBinOp(a, CL.#*, b)
	    | (Op.IDiv, [a, b]) => CL.mkBinOp(a, CL.#/, b)
	    | (Op.IMod, [a, b]) => CL.mkBinOp(a, CL.#%, b)
	    | (Op.INeg, [a]) => CL.mkUnOp(CL.%-, a)
	    | (Op.RAdd, [a, b]) => CL.mkBinOp(a, CL.#+, b)
	    | (Op.RSub, [a, b]) => CL.mkBinOp(a, CL.#-, b)
	    | (Op.RMul, [a, b]) => CL.mkBinOp(a, CL.#*, b)
	    | (Op.RDiv, [a, b]) => CL.mkBinOp(a, CL.#/, b)
	    | (Op.RNeg, [a]) => CL.mkUnOp(CL.%-, a)
	    | (Op.RClamp, [a, b, c]) => CL.mkApply("clamp", [a, b, c])
	    | (Op.RLerp, [a, b, c]) => CL.mkApply("lerp", [a, b, c])
            | (Op.LT ty, [a, b]) => CL.mkBinOp(a, CL.#<, b)
            | (Op.LTE ty, [a, b]) => CL.mkBinOp(a, CL.#<=, b)
            | (Op.EQ ty, [a, b]) => CL.mkBinOp(a, CL.#==, b)
            | (Op.NEQ ty, [a, b]) => CL.mkBinOp(a, CL.#!=, b)
            | (Op.GTE ty, [a, b]) => CL.mkBinOp(a, CL.#>=, b)
            | (Op.GT ty, [a, b]) => CL.mkBinOp(a, CL.#>, b)
            | (Op.Not, [a]) => CL.mkUnOp(CL.%!, a)
	    | (Op.Abs ty, args) => mkStdApply("abs", args)
	    | (Op.Max ty, args) => mkStdApply("min", args)
	    | (Op.Min ty, args) => mkStdApply("max", args)
	    | (Op.VAdd d, [a, b]) => CL.mkBinOp(a, CL.#+, b)
	    | (Op.VSub d, [a, b]) => CL.mkBinOp(a, CL.#-, b)
	    | (Op.VScale d, [a, b]) => CL.mkApply("vscale", [a, b])
	    | (Op.VMul d, [a, b]) => CL.mkBinOp(a, CL.#*, b)
	    | (Op.VNeg d, [a]) => CL.mkUnOp(CL.%-, a)
	    | (Op.VSum d, [a]) => CL.mkApply("vsum", [a])
	    | (Op.VIndex(d, i), [a]) => CL.mkSubscript(a, intExp i)
	    | (Op.VClamp d, [a, b, c]) => CL.mkApply("clamp", [a, b, c])
	    | (Op.VMapClamp d, [a, b, c]) => CL.mkApply("clamp", [a, b, c])
	    | (Op.VLerp d, [a, b, c]) => CL.mkApply("lerp", [a, b, c])
	    | (Op.TensorIndex(ty, idxs), [a]) => ??
	    | (Op.ProjectLast(ty, idxs), [a]) => ??
	    | (Op.EigenVals2x2, [a]) => ??
	    | (Op.EigenVals3x3, [a]) => ??
	    | (Op.Zero ty, []) => ??
	    | (Op.Select(ty, i), [a]) => ??
	    | (Op.Subscript ty, [a, b]) => ??
	    | (Op.MkDynamic(ty, i), [a]) => ??
	    | (Op.Append ty, [a, b]) => ??
	    | (Op.Prepend ty, [a, b]) => ??
	    | (Op.Concat ty, [a, b]) => ??
	    | (Op.Range, [a, b]) => ??
	    | (Op.Length ty, [a]) => ??
	    | (Op.SphereQuery(ty1, ty2), []) => ??
	    | (Op.Sqrt, [a]) => mkStdApply("sqrt", [a])
	    | (Op.Cos, [a]) => mkStdApply("cos", [a])
	    | (Op.ArcCos, [a]) => mkStdApply("acos", [a])
	    | (Op.Sin, [a]) => mkStdApply("sin", [a])
	    | (Op.ArcSin, [a]) => mkStdApply("asin", [a])
	    | (Op.Tan, [a]) => mkStdApply("tan", [a])
	    | (Op.ArcTan, [a]) => mkStdApply("atan", [a])
	    | (Op.Exp, [a]) => mkStdApply("exp", [a])
	    | (Op.Ceiling 1, [a]) => mkStdApply("ceil", [a])
	    | (Op.Ceiling d, [a]) => ??
	    | (Op.Floor 1, [a]) => mkStdApply("floor", [a])
	    | (Op.Floor d, [a]) => ??
	    | (Op.Round 1, [a]) => mkStdApply("round", [a])
	    | (Op.Round d, [a]) => ??
	    | (Op.Trunc 1, [a]) => mkStdApply("trunc", [a])
	    | (Op.Trunc d, [a]) => ??
	    | (Op.IntToReal, [a]) => ??
	    | (Op.RealToInt 1, [a]) => ??
	    | (Op.RealToInt d, [a]) => ??
(*
	    | R_All of ty
	    | R_Exists of ty
	    | R_Max of ty
	    | R_Min of ty
	    | R_Sum of ty
	    | R_Product of ty
	    | R_Mean of ty
	    | R_Variance of ty
*)
	    | (Op.Transform info, [img]) => ??
	    | (Op.Translate info, [img]) => ??
	    | (Op.BaseAddress info, [img]) => ??
	    | (Op.ControlIndex(info, ctl, i), [a]) => ??
	    | (Op.Inside(info, i), [pos, img]) => ??
	    | (Op.ImageDim(info, i), [img]) => ??
	    | (Op.LoadSeq(ty, file), []) => ??
	    | (Op.LoadImage(ty, file), []) => ??
	    | (Op.MathFn f, args) => mkStdApply(MathFns.toString f, args)
	    | _ => raise Fail(concat[
		   "unknown or incorrect operator ", Op.toString rator
		 ])
	  (* end case *))

    fun trExp (env, e) = (case e
           of IR.E_Global x => rvalueGlobalVar (env, x)
            | IR.E_State(NONE, x) => rvalueStateVar (env, x)
            | IR.E_State(SOME e, x) => CL.mkIndirect(trExp(env, e), TreeStateVar.name x)
            | IR.E_Var x => rvalueVar (env, x)
            | IR.E_Lit(Literal.Int n) => CL.mkIntTy(n, Env.intTy env)
            | IR.E_Lit(Literal.Bool b) => CL.mkBool b
            | IR.E_Lit(Literal.Real f) => CL.mkFlt(f, Env.realTy env)
            | IR.E_Lit(Literal.String s) => CL.mkStr s
            | IR.E_Op(rator, args) => trOp (rator, trExps(env, args))
	    | IR.E_Vec(d, args) => ??
            | IR.E_Cons(args, Ty.TensorTy shape) => ??
            | IR.E_Seq(args, ty) => ??
	    | IR.E_Pack(layout, args) => ??
	    | IR.E_VLoad(layout, e, i) => ??
          (* end case *))

    and trExps (env, exps) = List.map (fn exp => trExp(env, exp)) exps

(* QUESTION: not sure that we need this function? *)
    fun trExpToVar (env, ty, name, exp) = (case trExp (env, exp)
	   of e as CL.E_Var _ => (e, [])
	    | e => let
		val x = freshName name
		in
		  (CL.mkVar x, [CL.mkDeclInit(ty, x, e)])
		end
	  (* end case *))

    fun trRHS mkStm (env, rhs) = (case rhs
	   of IR.E_Op(??, args) => ???
	    | IR.E_Cons(args, Ty.TensorTy shape) => ??
            | IR.E_Seq(args, ty) => ??
	    | _ => mkStm (trExp (env, rhs)) (* generic case *)
	  (* end case *))

    fun trAssign (env, lhs, rhs) =
	  trRHS (fn rhs => CL.mkAssign(lhs, rhs)) (env, rhs)

    fun trDecl (env, ty, lhs, rhs) =
	  trRHS (fn rhs => CL.mkDeclInit(ty, lhs, rhs)) (env, rhs)

    fun trMultiAssign (env, lhs, IR.E_Op(rator, args)) = (case (lhs, rator, args)
           of ([vals, vecs], Op.EigenVecs2x2, [exp]) =>
		mkDiderotCall("eigenvecs", [trExp (env, exp), vals, vecs])
            | ([vals, vecs], Op.EigenVecs3x3, [exp]) =>
		mkDiderotCall("eigenvecs", [trExp (env, exp), vals, vecs])
            | _ => raise Fail "bogus multi-assignment"
          (* end case *))
      | trMultiAssign (env, lhs, rhs) = raise Fail "bogus multi-assignment"

    fun trStms (env, stms : TreeIR.stm list) = let
          fun trStm (stm, (env, stms : CL.stm list)) = (case stm
                 of IR.S_Comment text => (env, CL.mkComment text :: stms)
                  | IR.S_Assign(true, x, exp) => let
		      val (env, stm) = trDecl (env, ??, Env.lookup (env, x), exp)
		      in
			(env, stm::stms)
		      end
                  | IR.S_Assign(false, x, exp) => let
		      val (env, stm) = trAssign (env, lvalueVar (env, x), exp)
		      in
			(env, stm::stms)
		      end
		  | IR.S_MAssign(xs, exp) =>
                      (env, trMultiAssign (env, List.map (fn x => lvalueVar (env, x)) xs, exp) @ stms)
                  | IR.S_GAssign(x, exp) =>
		      (env, trAssign (env, lvalueGlobalVar (env, x), exp) :: stms)
                  | IR.S_IfThen(cond, thenBlk) =>
                      (env, CL.mkIfThen(trExp(env, cond), trBlock(env, thenBlk)) :: stms)
                  | IR.S_IfThenElse(cond, thenBlk, elseBlk) => let
		      val stm = CL.mkIfThenElse(trExp(env, cond),
			    trBlock(env, thenBlk),
			    trBlock(env, elseBlk))
		      in
			(env, stm :: stms)
		      end
		  | IR.S_Foreach(x, IR.E_Op(Op.Range, [lo, hi]), blk) => let
		      val x' = V.name x
		      val env' = Env.insert (env, x, x')
		      val loop = CL.mkFor(
			    [(CL.int32, x', lo')],
			    CL.mkBinOp(CL.mkVar x', CL.#<=, hi'),
			    CL.mkUnOp(CL.%++, CL.mkVar x'),
			    trBlock (env', blk))
		      in
			(env, loop :: stms)
		      end
		  | IR.S_Foreach(x, e, blk) => ??
                  | IR.S_New(strand, args) => ??
                  | IR.S_Save(x, exp) => trAssign (env, lvalueStateVar(env, x), exp)
                  | IR.S_LoadNrrd(lhs, Ty.SeqTy(ty, NONE), nrrd) =>
                      (env, GenLoadNrrd.loadSeqFromFile (lvalueVar (env, lhs), ty, CL.mkStr nrrd) :: stms)
                  | IR.S_LoadNrrd(lhs, Ty.ImageTy info, nrrd) =>
                      (env, GenLoadNrrd.loadImage (lvalueVar (env, lhs), info, CL.mkStr nrrd) :: stms)
                  | IR.S_Input(_, _, _, NONE) => (env, stms)
                  | IR.S_Input(gv, name, _, SOME dflt) =>
                      (env, CL.mkAssign(lvalueGlobalVar (env, gv), trExp(env, dflt)) :: stms)
                  | IR.S_InputNrrd _ => (env, stms)
                  | IR.S_Exit => (env, stms)
		  | IR.S_Print(tys, args) => let
		      val args = List.map (fn e => trExp(env, e)) args
		      val stm = GenPrint.genPrintStm (
			    CL.mkIndirect(CL.mkVar "wrld", "_output"),
			    tys, args)
		      in
			(env, stm::stms)
		      end
                  | IR.S_Active => (env, CL.mkReturn(SOME(CL.mkVar "diderot::kActive")) :: stms)
                  | IR.S_Stabilize => (env, CL.mkReturn(SOME(CL.mkVar "diderot::kStabilize")) :: stms)
                  | IR.S_Die => (env, CL.mkReturn(SOME(CL.mkVar "diderot::kDie")) :: stms)
                (* end case *))
          in
            List.rev (#2 (List.foldl trStm (env, []) stms))
          end

    and trBlock (env, IR.Block{locals, body}) = let
	  fun trLocal (x, (env, dcls)) = let
		val x' = V.name x
		in
		  (Env.insert(env, x, x'), CL.mkDecl(ty, x', NONE) :: dcls)
		end
	  val (env, dcls) = List.foldl trLocal (env, []) (!locals)
          in
            CL.mkBlock (dcls @ trStms (env, body))
          end

  end

root@smlnj-gforge.cs.uchicago.edu
ViewVC Help
Powered by ViewVC 1.0.0