furnace/extern/fftw/genfft/gen_notw_c.ml

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(*
* Copyright (c) 1997-1999 Massachusetts Institute of Technology
* Copyright (c) 2003, 2007-14 Matteo Frigo
* Copyright (c) 2003, 2007-14 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*)
open Util
open Genutil
open C
let usage = "Usage: " ^ Sys.argv.(0) ^ " -n <number>"
let uistride = ref Stride_variable
let uostride = ref Stride_variable
let uivstride = ref Stride_variable
let uovstride = ref Stride_variable
let speclist = [
"-with-istride",
Arg.String(fun x -> uistride := arg_to_stride x),
" specialize for given input stride";
"-with-ostride",
Arg.String(fun x -> uostride := arg_to_stride x),
" specialize for given output stride";
"-with-ivstride",
Arg.String(fun x -> uivstride := arg_to_stride x),
" specialize for given input vector stride";
"-with-ovstride",
Arg.String(fun x -> uovstride := arg_to_stride x),
" specialize for given output vector stride"
]
let nonstandard_optimizer list_of_buddy_stores dag =
let sched = standard_scheduler dag in
let annot = Annotate.annotate list_of_buddy_stores sched in
let _ = dump_asched annot in
annot
let generate n =
let riarray = "xi"
and roarray = "xo"
and istride = "is"
and ostride = "os"
and i = "i"
and v = "v"
in
let sign = !Genutil.sign
and name = !Magic.codelet_name
and byvl x = choose_simd x (ctimes (CVar "VL", x)) in
let ename = expand_name name in
let vistride = either_stride (!uistride) (C.SVar istride)
and vostride = either_stride (!uostride) (C.SVar ostride)
in
let sivs = stride_to_string "ivs" !uivstride in
let sovs = stride_to_string "ovs" !uovstride in
let fft = Trig.dft_via_rdft in
let locations = unique_array_c n in
let input =
locative_array_c n
(C.array_subscript riarray vistride)
(C.array_subscript "BUG" vistride)
locations sivs in
let output = fft sign n (load_array_r n input) in
let oloc =
locative_array_c n
(C.array_subscript roarray vostride)
(C.array_subscript "BUG" vostride)
locations sovs in
let list_of_buddy_stores =
let k = !Simdmagic.store_multiple in
if (k > 1) then
if (n mod k == 0) then
List.map
(fun i -> List.map (fun j -> (fst (oloc (k * i + j)))) (iota k))
(iota (n / k))
else failwith "invalid n for -store-multiple"
else []
in
let odag = store_array_r n oloc output in
let annot = nonstandard_optimizer list_of_buddy_stores odag in
let body = Block (
[Decl ("INT", i);
Decl (C.constrealtypep, riarray);
Decl (C.realtypep, roarray)],
[Stmt_assign (CVar riarray, CVar (if (sign < 0) then "ri" else "ii"));
Stmt_assign (CVar roarray, CVar (if (sign < 0) then "ro" else "io"));
For (Expr_assign (CVar i, CVar v),
Binop (" > ", CVar i, Integer 0),
list_to_comma
[Expr_assign (CVar i, CPlus [CVar i; CUminus (byvl (Integer 1))]);
Expr_assign (CVar riarray, CPlus [CVar riarray;
byvl (CVar sivs)]);
Expr_assign (CVar roarray, CPlus [CVar roarray;
byvl (CVar sovs)]);
make_volatile_stride (2*n) (CVar istride);
make_volatile_stride (2*n) (CVar ostride)
],
Asch annot);
])
in
let tree =
Fcn ((if !Magic.standalone then "void" else "static void"), ename,
([Decl (C.constrealtypep, "ri");
Decl (C.constrealtypep, "ii");
Decl (C.realtypep, "ro");
Decl (C.realtypep, "io");
Decl (C.stridetype, istride);
Decl (C.stridetype, ostride);
Decl ("INT", v);
Decl ("INT", "ivs");
Decl ("INT", "ovs")]),
finalize_fcn body)
in
let desc =
Printf.sprintf
"static const kdft_desc desc = { %d, %s, %s, &GENUS, %s, %s, %s, %s };\n"
n (stringify name) (flops_of tree)
(stride_to_solverparm !uistride) (stride_to_solverparm !uostride)
(choose_simd "0" (stride_to_solverparm !uivstride))
(choose_simd "0" (stride_to_solverparm !uovstride))
and init =
(declare_register_fcn name) ^
"{" ^
" X(kdft_register)(p, " ^ ename ^ ", &desc);\n" ^
"}\n"
in ((unparse tree) ^ "\n" ^
(if !Magic.standalone then "" else desc ^ init))
let main () =
begin
Simdmagic.simd_mode := true;
parse speclist usage;
print_string (generate (check_size ()));
end
let _ = main()