view Lib/fftw-3.2.1/genfft/simd.ml @ 1:e86e9c111b29

Updates stuff that potentially fixes the memory leak and also makes it work on Windows and Linux (Need to test). Still have to fix fftw include for linux in Jucer.

(*
 * Copyright (c) 1997-1999 Massachusetts Institute of Technology
 * Copyright (c) 2003, 2007-8 Matteo Frigo
 * Copyright (c) 2003, 2007-8 Massachusetts Institute of Technology
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *)

open Expr
open List
open Printf
open Variable
open Annotate
open Simdmagic
open C

let realtype = "V"
let realtypep = realtype ^ " *"
let constrealtype = "const " ^ realtype
let constrealtypep = constrealtype ^ " *"
let alignment_mod = 2

(*
 * SIMD C AST unparser 
 *)
let foldr_string_concat l = fold_right (^) l ""

let rec unparse_by_twiddle nam tw src = 
  sprintf "%s(&(%s),%s)" nam (Variable.unparse tw) (unparse_expr src)

and unparse_store dst = function
  | Times (NaN MULTI_A, x) ->
      sprintf "STM%d(&(%s),%s,%s,&(%s));\n" 
	!Simdmagic.store_multiple
	(Variable.unparse dst) (unparse_expr x)
	(Variable.vstride_of_locative dst)
	(Variable.unparse_for_alignment alignment_mod dst)
  | Times (NaN MULTI_B, Plus stuff) ->
      sprintf "STN%d(&(%s)%s,%s);\n" 
	!Simdmagic.store_multiple
	(Variable.unparse dst) 
	(List.fold_right (fun x a -> "," ^ (unparse_expr x) ^ a) stuff "")
	(Variable.vstride_of_locative dst)
  | src_expr -> 
      sprintf "ST(&(%s),%s,%s,&(%s));\n" 
	(Variable.unparse dst) (unparse_expr src_expr) 
	(Variable.vstride_of_locative dst)
	(Variable.unparse_for_alignment alignment_mod dst)

and unparse_expr =
  let rec unparse_plus = function
    | [a] -> unparse_expr a

    | (Uminus (Times (NaN I, b))) :: c :: d -> op2 "VFNMSI" [b] (c :: d)
    | c :: (Uminus (Times (NaN I, b))) :: d -> op2 "VFNMSI" [b] (c :: d)
    | (Uminus (Times (NaN CONJ, b))) :: c :: d -> op2 "VFNMSCONJ" [b] (c :: d)
    | c :: (Uminus (Times (NaN CONJ, b))) :: d -> op2 "VFNMSCONJ" [b] (c :: d)
    | (Times (NaN I, b)) :: c :: d -> op2 "VFMAI" [b] (c :: d)
    | c :: (Times (NaN I, b)) :: d -> op2 "VFMAI" [b] (c :: d)
    | (Times (NaN CONJ, b)) :: (Uminus c) :: d -> op2 "VFMSCONJ" [b] (c :: d)
    | (Uminus c) :: (Times (NaN CONJ, b)) :: d -> op2 "VFMSCONJ" [b] (c :: d)
    | (Times (NaN CONJ, b)) :: c :: d -> op2 "VFMACONJ" [b] (c :: d)
    | c :: (Times (NaN CONJ, b)) :: d -> op2 "VFMACONJ" [b] (c :: d)
    | (Times (NaN _, b)) :: (Uminus c) :: d -> failwith "VFMS NaN"
    | (Uminus c) :: (Times (NaN _, b)) :: d -> failwith "VFMS NaN"

    | (Uminus (Times (a, b))) :: c :: d -> op3 "VFNMS" a b (c :: d)
    | c :: (Uminus (Times (a, b))) :: d -> op3 "VFNMS" a b (c :: d)
    | (Times (a, b)) :: (Uminus c) :: d -> op3 "VFMS" a b (c :: negate d)
    | (Uminus c) :: (Times (a, b)) :: d -> op3 "VFMS" a b (c :: negate d)
    | (Times (a, b)) :: c :: d          -> op3 "VFMA" a b (c :: d)
    | c :: (Times (a, b)) :: d          -> op3 "VFMA" a b (c :: d)

    | (Uminus a :: b)                   -> op2 "VSUB" b [a]
    | (b :: Uminus a :: c)              -> op2 "VSUB" (b :: c) [a]
    | (a :: b)                          -> op2 "VADD" [a] b
    | [] -> failwith "unparse_plus"
  and op3 nam a b c =
    nam ^ "(" ^ (unparse_expr a) ^ ", " ^ (unparse_expr b) ^ ", " ^
    (unparse_plus c) ^ ")"
  and op2 nam a b = 
    nam ^ "(" ^ (unparse_plus a) ^ ", " ^ (unparse_plus b) ^ ")"
  and op1 nam a = 
    nam ^ "(" ^ (unparse_expr a) ^ ")"
  and negate = function
    | [] -> []
    | (Uminus x) :: y -> x :: negate y
    | x :: y -> (Uminus x) :: negate y

  in function
    | CTimes(Load tw, src) 
	when Variable.is_constant tw && !Magic.generate_bytw ->
	unparse_by_twiddle "BYTW" tw src
    | CTimesJ(Load tw, src) 
	when Variable.is_constant tw && !Magic.generate_bytw ->
	unparse_by_twiddle "BYTWJ" tw src
    | Load v when is_locative(v) ->
	sprintf "LD(&(%s), %s, &(%s))" (Variable.unparse v) 
	  (Variable.vstride_of_locative v)
	  (Variable.unparse_for_alignment alignment_mod v)
    | Load v when is_constant(v) -> sprintf "LDW(&(%s))" (Variable.unparse v)
    | Load v  -> Variable.unparse v
    | Num n -> sprintf "LDK(%s)" (Number.to_konst n)
    | NaN n -> failwith "NaN in unparse_expr"
    | Plus [] -> "0.0 /* bug */"
    | Plus [a] -> " /* bug */ " ^ (unparse_expr a)
    | Plus a -> unparse_plus a
    | Times(NaN I,b) -> op1 "VBYI" b
    | Times(NaN CONJ,b) -> op1 "VCONJ" b
    | Times(a,b) ->
	sprintf "VMUL(%s, %s)" (unparse_expr a) (unparse_expr b)
    | CTimes(a,Times(NaN I, b)) ->
	sprintf "VZMULI(%s, %s)" (unparse_expr a) (unparse_expr b)
    | CTimes(a,b) ->
	sprintf "VZMUL(%s, %s)" (unparse_expr a) (unparse_expr b)
    | CTimesJ(a,Times(NaN I, b)) ->
	sprintf "VZMULIJ(%s, %s)" (unparse_expr a) (unparse_expr b)
    | CTimesJ(a,b) ->
	sprintf "VZMULJ(%s, %s)" (unparse_expr a) (unparse_expr b)
    | Uminus a when !Magic.vneg -> op1 "VNEG" a
    | Uminus a -> failwith "SIMD Uminus"
    | _ -> failwith "unparse_expr"

and unparse_decl x = C.unparse_decl x

and unparse_ast ast = 
  let rec unparse_assignment = function
    | Assign (v, x) when Variable.is_locative v ->
	unparse_store v x
    | Assign (v, x) -> 
	(Variable.unparse v) ^ " = " ^ (unparse_expr x) ^ ";\n"

  and unparse_annotated force_bracket = 
    let rec unparse_code = function
      | ADone -> ""
      | AInstr i -> unparse_assignment i
      | ASeq (a, b) -> 
	  (unparse_annotated false a) ^ (unparse_annotated false b)
    and declare_variables l = 
      let rec uvar = function
	  [] -> failwith "uvar"
	|	[v] -> (Variable.unparse v) ^ ";\n"
	| a :: b -> (Variable.unparse a) ^ ", " ^ (uvar b)
      in let rec vvar l = 
	let s = if !Magic.compact then 15 else 1 in
	if (List.length l <= s) then
	  match l with
	    [] -> ""
	  | _ -> realtype ^ " " ^ (uvar l)
	else
	  (vvar (Util.take s l)) ^ (vvar (Util.drop s l))
      in vvar (List.filter Variable.is_temporary l)
    in function
        Annotate (_, _, decl, _, code) ->
          if (not force_bracket) && (Util.null decl) then 
            unparse_code code
          else "{\n" ^
            (declare_variables decl) ^
            (unparse_code code) ^
	    "}\n"

(* ---- *)
  and unparse_plus = function
    | [] -> ""
    | (CUminus a :: b) -> " - " ^ (parenthesize a) ^ (unparse_plus b)
    | (a :: b) -> " + " ^ (parenthesize a) ^ (unparse_plus b)
  and parenthesize x = match x with
  | (CVar _) -> unparse_ast x
  | (CCall _) -> unparse_ast x
  | (Integer _) -> unparse_ast x
  | _ -> "(" ^ (unparse_ast x) ^ ")"

  in match ast with 
  | Asch a -> (unparse_annotated true a)
  | Return x -> "return " ^ unparse_ast x ^ ";"
  | For (a, b, c, d) ->
      "for (" ^
      unparse_ast a ^ "; " ^ unparse_ast b ^ "; " ^ unparse_ast c
      ^ ")" ^ unparse_ast d
  | If (a, d) ->
      "if (" ^
      unparse_ast a 
      ^ ")" ^ unparse_ast d
  | Block (d, s) ->
      if (s == []) then ""
      else 
        "{\n"                                      ^ 
        foldr_string_concat (map unparse_decl d)   ^ 
        foldr_string_concat (map unparse_ast s)    ^
        "}\n"      
  | x -> C.unparse_ast x

and unparse_function = function
    Fcn (typ, name, args, body) ->
      let rec unparse_args = function
          [Decl (a, b)] -> a ^ " " ^ b 
	| (Decl (a, b)) :: s -> a ^ " " ^ b  ^ ", "
            ^  unparse_args s
	| [] -> ""
	| _ -> failwith "unparse_function"
      in 
      (typ ^ " " ^ name ^ "(" ^ unparse_args args ^ ")\n" ^
       unparse_ast body)

let extract_constants f =
  let constlist = flatten (map expr_to_constants (C.ast_to_expr_list f))
  in map
       (fun n ->
	  Tdecl 
	    ("DVK(" ^ (Number.to_konst n) ^ ", " ^ (Number.to_string n) ^ 
	       ");\n"))
       (unique_constants constlist)