216 lines
7.6 KiB
OCaml
216 lines
7.6 KiB
OCaml
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(*
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* Copyright (c) 1997-1999 Massachusetts Institute of Technology
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* Copyright (c) 2003, 2007-14 Matteo Frigo
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* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*)
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open Expr
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open List
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open Printf
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open Variable
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open Annotate
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open Simdmagic
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open C
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let realtype = "V"
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let realtypep = realtype ^ " *"
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let constrealtype = "const " ^ realtype
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let constrealtypep = constrealtype ^ " *"
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let alignment_mod = 2
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(*
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* SIMD C AST unparser
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*)
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let foldr_string_concat l = fold_right (^) l ""
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let rec unparse_by_twiddle nam tw src =
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sprintf "%s(&(%s),%s)" nam (Variable.unparse tw) (unparse_expr src)
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and unparse_store dst = function
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| Times (NaN MULTI_A, x) ->
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sprintf "STM%d(&(%s),%s,%s,&(%s));\n"
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!Simdmagic.store_multiple
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(Variable.unparse dst) (unparse_expr x)
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(Variable.vstride_of_locative dst)
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(Variable.unparse_for_alignment alignment_mod dst)
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| Times (NaN MULTI_B, Plus stuff) ->
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sprintf "STN%d(&(%s)%s,%s);\n"
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!Simdmagic.store_multiple
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(Variable.unparse dst)
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(List.fold_right (fun x a -> "," ^ (unparse_expr x) ^ a) stuff "")
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(Variable.vstride_of_locative dst)
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| src_expr ->
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sprintf "ST(&(%s),%s,%s,&(%s));\n"
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(Variable.unparse dst) (unparse_expr src_expr)
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(Variable.vstride_of_locative dst)
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(Variable.unparse_for_alignment alignment_mod dst)
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and unparse_expr =
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let rec unparse_plus = function
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| [a] -> unparse_expr a
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| (Uminus (Times (NaN I, b))) :: c :: d -> op2 "VFNMSI" [b] (c :: d)
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| c :: (Uminus (Times (NaN I, b))) :: d -> op2 "VFNMSI" [b] (c :: d)
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| (Uminus (Times (NaN CONJ, b))) :: c :: d -> op2 "VFNMSCONJ" [b] (c :: d)
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| c :: (Uminus (Times (NaN CONJ, b))) :: d -> op2 "VFNMSCONJ" [b] (c :: d)
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| (Times (NaN I, b)) :: c :: d -> op2 "VFMAI" [b] (c :: d)
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| c :: (Times (NaN I, b)) :: d -> op2 "VFMAI" [b] (c :: d)
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| (Times (NaN CONJ, b)) :: (Uminus c) :: d -> op2 "VFMSCONJ" [b] (c :: d)
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| (Uminus c) :: (Times (NaN CONJ, b)) :: d -> op2 "VFMSCONJ" [b] (c :: d)
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| (Times (NaN CONJ, b)) :: c :: d -> op2 "VFMACONJ" [b] (c :: d)
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| c :: (Times (NaN CONJ, b)) :: d -> op2 "VFMACONJ" [b] (c :: d)
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| (Times (NaN _, b)) :: (Uminus c) :: d -> failwith "VFMS NaN"
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| (Uminus c) :: (Times (NaN _, b)) :: d -> failwith "VFMS NaN"
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| (Uminus (Times (a, b))) :: c :: d -> op3 "VFNMS" a b (c :: d)
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| c :: (Uminus (Times (a, b))) :: d -> op3 "VFNMS" a b (c :: d)
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| (Times (a, b)) :: (Uminus c) :: d -> op3 "VFMS" a b (c :: negate d)
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| (Uminus c) :: (Times (a, b)) :: d -> op3 "VFMS" a b (c :: negate d)
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| (Times (a, b)) :: c :: d -> op3 "VFMA" a b (c :: d)
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| c :: (Times (a, b)) :: d -> op3 "VFMA" a b (c :: d)
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| (Uminus a :: b) -> op2 "VSUB" b [a]
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| (b :: Uminus a :: c) -> op2 "VSUB" (b :: c) [a]
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| (a :: b) -> op2 "VADD" [a] b
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| [] -> failwith "unparse_plus"
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and op3 nam a b c =
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nam ^ "(" ^ (unparse_expr a) ^ ", " ^ (unparse_expr b) ^ ", " ^
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(unparse_plus c) ^ ")"
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and op2 nam a b =
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nam ^ "(" ^ (unparse_plus a) ^ ", " ^ (unparse_plus b) ^ ")"
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and op1 nam a =
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nam ^ "(" ^ (unparse_expr a) ^ ")"
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and negate = function
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| [] -> []
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| (Uminus x) :: y -> x :: negate y
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| x :: y -> (Uminus x) :: negate y
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in function
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| CTimes(Load tw, src)
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when Variable.is_constant tw && !Magic.generate_bytw ->
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unparse_by_twiddle "BYTW" tw src
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| CTimesJ(Load tw, src)
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when Variable.is_constant tw && !Magic.generate_bytw ->
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unparse_by_twiddle "BYTWJ" tw src
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| Load v when is_locative(v) ->
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sprintf "LD(&(%s), %s, &(%s))" (Variable.unparse v)
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(Variable.vstride_of_locative v)
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(Variable.unparse_for_alignment alignment_mod v)
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| Load v when is_constant(v) -> sprintf "LDW(&(%s))" (Variable.unparse v)
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| Load v -> Variable.unparse v
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| Num n -> sprintf "LDK(%s)" (Number.to_konst n)
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| NaN n -> failwith "NaN in unparse_expr"
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| Plus [] -> "0.0 /* bug */"
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| Plus [a] -> " /* bug */ " ^ (unparse_expr a)
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| Plus a -> unparse_plus a
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| Times(NaN I,b) -> op1 "VBYI" b
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| Times(NaN CONJ,b) -> op1 "VCONJ" b
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| Times(a,b) ->
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sprintf "VMUL(%s, %s)" (unparse_expr a) (unparse_expr b)
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| CTimes(a,Times(NaN I, b)) ->
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sprintf "VZMULI(%s, %s)" (unparse_expr a) (unparse_expr b)
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| CTimes(a,b) ->
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sprintf "VZMUL(%s, %s)" (unparse_expr a) (unparse_expr b)
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| CTimesJ(a,Times(NaN I, b)) ->
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sprintf "VZMULIJ(%s, %s)" (unparse_expr a) (unparse_expr b)
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| CTimesJ(a,b) ->
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sprintf "VZMULJ(%s, %s)" (unparse_expr a) (unparse_expr b)
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| Uminus a when !Magic.vneg -> op1 "VNEG" a
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| Uminus a -> failwith "SIMD Uminus"
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| _ -> failwith "unparse_expr"
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and unparse_decl x = C.unparse_decl x
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and unparse_ast ast =
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let rec unparse_assignment = function
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| Assign (v, x) when Variable.is_locative v ->
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unparse_store v x
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| Assign (v, x) ->
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(Variable.unparse v) ^ " = " ^ (unparse_expr x) ^ ";\n"
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and unparse_annotated force_bracket =
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let rec unparse_code = function
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| ADone -> ""
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| AInstr i -> unparse_assignment i
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| ASeq (a, b) ->
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(unparse_annotated false a) ^ (unparse_annotated false b)
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and declare_variables l =
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let rec uvar = function
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[] -> failwith "uvar"
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| [v] -> (Variable.unparse v) ^ ";\n"
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| a :: b -> (Variable.unparse a) ^ ", " ^ (uvar b)
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in let rec vvar l =
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let s = if !Magic.compact then 15 else 1 in
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if (List.length l <= s) then
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match l with
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[] -> ""
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| _ -> realtype ^ " " ^ (uvar l)
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else
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(vvar (Util.take s l)) ^ (vvar (Util.drop s l))
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in vvar (List.filter Variable.is_temporary l)
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in function
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Annotate (_, _, decl, _, code) ->
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if (not force_bracket) && (Util.null decl) then
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unparse_code code
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else "{\n" ^
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(declare_variables decl) ^
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(unparse_code code) ^
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"}\n"
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in match ast with
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| Asch a -> (unparse_annotated true a)
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| Return x -> "return " ^ unparse_ast x ^ ";"
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| Simd_leavefun -> "VLEAVE();"
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| For (a, b, c, d) ->
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"for (" ^
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unparse_ast a ^ "; " ^ unparse_ast b ^ "; " ^ unparse_ast c
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^ ")" ^ unparse_ast d
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| If (a, d) ->
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"if (" ^
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unparse_ast a
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^ ")" ^ unparse_ast d
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| Block (d, s) ->
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if (s == []) then ""
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else
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"{\n" ^
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foldr_string_concat (map unparse_decl d) ^
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foldr_string_concat (map unparse_ast s) ^
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"}\n"
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| x -> C.unparse_ast x
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and unparse_function = function
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Fcn (typ, name, args, body) ->
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let rec unparse_args = function
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[Decl (a, b)] -> a ^ " " ^ b
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| (Decl (a, b)) :: s -> a ^ " " ^ b ^ ", "
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^ unparse_args s
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| [] -> ""
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| _ -> failwith "unparse_function"
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in
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(typ ^ " " ^ name ^ "(" ^ unparse_args args ^ ")\n" ^
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unparse_ast body)
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let extract_constants f =
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let constlist = flatten (map expr_to_constants (C.ast_to_expr_list f))
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in map
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(fun n ->
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Tdecl
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("DVK(" ^ (Number.to_konst n) ^ ", " ^ (Number.to_string n) ^
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");\n"))
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(unique_constants constlist)
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