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(*
* 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)
|
