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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 urs = ref Stride_variable
let ucsr = ref Stride_variable
let ucsi = ref Stride_variable
let uivs = ref Stride_variable
let uovs = ref Stride_variable
let dftIII_flag = ref false
let speclist = [
"-with-rs",
Arg.String(fun x -> urs := arg_to_stride x),
" specialize for given real-array stride";
"-with-csr",
Arg.String(fun x -> ucsr := arg_to_stride x),
" specialize for given complex-array real stride";
"-with-csi",
Arg.String(fun x -> ucsi := arg_to_stride x),
" specialize for given complex-array imaginary stride";
"-with-ivs",
Arg.String(fun x -> uivs := arg_to_stride x),
" specialize for given input vector stride";
"-with-ovs",
Arg.String(fun x -> uovs := arg_to_stride x),
" specialize for given output vector stride";
"-dft-III",
Arg.Unit(fun () -> dftIII_flag := true),
" produce shifted dftIII-style codelets"
]
let hcdftIII sign n input =
let input' i =
if (i mod 2 == 0) then
Complex.zero
else
let i' = (i - 1) / 2 in
if (2 * i' < n - 1) then (input i')
else if (2 * i' == n - 1) then
Complex.real (input i')
else
Complex.conj (input (n - 1 - i'))
in Fft.dft sign (2 * n) input'
let generate n =
let ar0 = "R0" and ar1 = "R1" and acr = "Cr" and aci = "Ci"
and rs = "rs" and csr = "csr" and csi = "csi"
and i = "i" and v = "v"
and transform = if !dftIII_flag then hcdftIII else Trig.hdft
in
let sign = !Genutil.sign
and name = !Magic.codelet_name in
let vrs = either_stride (!urs) (C.SVar rs)
and vcsr = either_stride (!ucsr) (C.SVar csr)
and vcsi = either_stride (!ucsi) (C.SVar csi)
in
let sovs = stride_to_string "ovs" !uovs in
let sivs = stride_to_string "ivs" !uivs in
let locations = unique_array_c n in
let input =
locative_array_c n
(C.array_subscript acr vcsr)
(C.array_subscript aci vcsi)
locations sivs in
let output = transform sign n (load_array_hc n input) in
let oloce =
locative_array_c n
(C.array_subscript ar0 vrs)
(C.array_subscript "BUG" vrs)
locations sovs
and oloco =
locative_array_c n
(C.array_subscript ar1 vrs)
(C.array_subscript "BUG" vrs)
locations sovs in
let oloc i = if i mod 2 == 0 then oloce (i/2) else oloco ((i-1)/2) in
let odag = store_array_r n oloc output in
let annot = standard_optimizer odag in
let body = Block (
[Decl ("INT", i)],
[For (Expr_assign (CVar i, CVar v),
Binop (" > ", CVar i, Integer 0),
list_to_comma
[Expr_assign (CVar i, CPlus [CVar i; CUminus (Integer 1)]);
Expr_assign (CVar ar0, CPlus [CVar ar0; CVar sovs]);
Expr_assign (CVar ar1, CPlus [CVar ar1; CVar sovs]);
Expr_assign (CVar acr, CPlus [CVar acr; CVar sivs]);
Expr_assign (CVar aci, CPlus [CVar aci; CVar sivs]);
make_volatile_stride (4*n) (CVar rs);
make_volatile_stride (4*n) (CVar csr);
make_volatile_stride (4*n) (CVar csi)
],
Asch annot)
])
in
let tree =
Fcn ((if !Magic.standalone then "void" else "static void"), name,
([Decl (C.realtypep, ar0);
Decl (C.realtypep, ar1);
Decl (C.realtypep, acr);
Decl (C.realtypep, aci);
Decl (C.stridetype, rs);
Decl (C.stridetype, csr);
Decl (C.stridetype, csi);
Decl ("INT", v);
Decl ("INT", "ivs");
Decl ("INT", "ovs")]),
finalize_fcn body)
in let desc =
Printf.sprintf
"static const kr2c_desc desc = { %d, \"%s\", %s, &GENUS };\n\n"
n name (flops_of tree)
and init =
(declare_register_fcn name) ^
"{" ^
" X(kr2c_register)(p, " ^ name ^ ", &desc);\n" ^
"}\n"
in
(unparse tree) ^ "\n" ^ (if !Magic.standalone then "" else desc ^ init)
let main () =
begin
parse speclist usage;
print_string (generate (check_size ()));
end
let _ = main()
|
