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annotate src/fftw-3.3.5/genfft/gen_twiddle.ml @ 84:08ae793730bd

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Add null config files
author Chris Cannam
date Mon, 02 Mar 2020 14:03:47 +0000
parents 2cd0e3b3e1fd
children
rev   line source
Chris@42 1 (*
Chris@42 2 * Copyright (c) 1997-1999 Massachusetts Institute of Technology
Chris@42 3 * Copyright (c) 2003, 2007-14 Matteo Frigo
Chris@42 4 * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
Chris@42 5 *
Chris@42 6 * This program is free software; you can redistribute it and/or modify
Chris@42 7 * it under the terms of the GNU General Public License as published by
Chris@42 8 * the Free Software Foundation; either version 2 of the License, or
Chris@42 9 * (at your option) any later version.
Chris@42 10 *
Chris@42 11 * This program is distributed in the hope that it will be useful,
Chris@42 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@42 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Chris@42 14 * GNU General Public License for more details.
Chris@42 15 *
Chris@42 16 * You should have received a copy of the GNU General Public License
Chris@42 17 * along with this program; if not, write to the Free Software
Chris@42 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Chris@42 19 *
Chris@42 20 *)
Chris@42 21
Chris@42 22 open Util
Chris@42 23 open Genutil
Chris@42 24 open C
Chris@42 25
Chris@42 26
Chris@42 27 type ditdif = DIT | DIF
Chris@42 28 let ditdif = ref DIT
Chris@42 29 let usage = "Usage: " ^ Sys.argv.(0) ^ " -n <number> [ -dit | -dif ]"
Chris@42 30
Chris@42 31 let urs = ref Stride_variable
Chris@42 32 let ums = ref Stride_variable
Chris@42 33
Chris@42 34 let speclist = [
Chris@42 35 "-dit",
Chris@42 36 Arg.Unit(fun () -> ditdif := DIT),
Chris@42 37 " generate a DIT codelet";
Chris@42 38
Chris@42 39 "-dif",
Chris@42 40 Arg.Unit(fun () -> ditdif := DIF),
Chris@42 41 " generate a DIF codelet";
Chris@42 42
Chris@42 43 "-with-rs",
Chris@42 44 Arg.String(fun x -> urs := arg_to_stride x),
Chris@42 45 " specialize for given i/o stride";
Chris@42 46
Chris@42 47 "-with-ms",
Chris@42 48 Arg.String(fun x -> ums := arg_to_stride x),
Chris@42 49 " specialize for given ms"
Chris@42 50 ]
Chris@42 51
Chris@42 52 let generate n =
Chris@42 53 let rioarray = "ri"
Chris@42 54 and iioarray = "ii"
Chris@42 55 and rs = "rs"
Chris@42 56 and twarray = "W"
Chris@42 57 and m = "m" and mb = "mb" and me = "me" and ms = "ms" in
Chris@42 58
Chris@42 59 let sign = !Genutil.sign
Chris@42 60 and name = !Magic.codelet_name
Chris@42 61 and byvl x = choose_simd x (ctimes (CVar "(2 * VL)", x)) in
Chris@42 62 let ename = expand_name name in
Chris@42 63
Chris@42 64 let (bytwiddle, num_twiddles, twdesc) = Twiddle.twiddle_policy 0 false in
Chris@42 65 let nt = num_twiddles n in
Chris@42 66
Chris@42 67 let byw = bytwiddle n sign (twiddle_array nt twarray) in
Chris@42 68
Chris@42 69 let vrs = either_stride (!urs) (C.SVar rs) in
Chris@42 70 let sms = stride_to_string "ms" !ums in
Chris@42 71
Chris@42 72 let locations = unique_array_c n in
Chris@42 73 let iloc =
Chris@42 74 locative_array_c n
Chris@42 75 (C.array_subscript rioarray vrs)
Chris@42 76 (C.array_subscript iioarray vrs)
Chris@42 77 locations sms
Chris@42 78 and oloc =
Chris@42 79 locative_array_c n
Chris@42 80 (C.array_subscript rioarray vrs)
Chris@42 81 (C.array_subscript iioarray vrs)
Chris@42 82 locations sms
Chris@42 83 in
Chris@42 84 let liloc = load_array_c n iloc in
Chris@42 85 let output =
Chris@42 86 match !ditdif with
Chris@42 87 | DIT -> array n (Fft.dft sign n (byw liloc))
Chris@42 88 | DIF -> array n (byw (Fft.dft sign n liloc))
Chris@42 89 in
Chris@42 90 let odag = store_array_c n oloc output in
Chris@42 91 let annot = standard_optimizer odag in
Chris@42 92
Chris@42 93 let vm = CVar m and vmb = CVar mb and vme = CVar me in
Chris@42 94
Chris@42 95 let body = Block (
Chris@42 96 [Decl ("INT", m)],
Chris@42 97 [For (list_to_comma
Chris@42 98 [Expr_assign (vm, vmb);
Chris@42 99 Expr_assign (CVar twarray,
Chris@42 100 CPlus [CVar twarray;
Chris@42 101 ctimes (vmb, Integer nt)])],
Chris@42 102 Binop (" < ", vm, vme),
Chris@42 103 list_to_comma
Chris@42 104 [Expr_assign (vm, CPlus [vm; byvl (Integer 1)]);
Chris@42 105 Expr_assign (CVar rioarray, CPlus [CVar rioarray;
Chris@42 106 byvl (CVar sms)]);
Chris@42 107 Expr_assign (CVar iioarray, CPlus [CVar iioarray;
Chris@42 108 byvl (CVar sms)]);
Chris@42 109 Expr_assign (CVar twarray, CPlus [CVar twarray;
Chris@42 110 byvl (Integer nt)]);
Chris@42 111 make_volatile_stride (2*n) (CVar rs)
Chris@42 112 ],
Chris@42 113 Asch annot)])
Chris@42 114 in
Chris@42 115
Chris@42 116 let tree =
Chris@42 117 Fcn (((if !Magic.standalone then "" else "static ") ^ "void"),
Chris@42 118 ename,
Chris@42 119 [Decl (C.realtypep, rioarray);
Chris@42 120 Decl (C.realtypep, iioarray);
Chris@42 121 Decl (C.constrealtypep, twarray);
Chris@42 122 Decl (C.stridetype, rs);
Chris@42 123 Decl ("INT", mb);
Chris@42 124 Decl ("INT", me);
Chris@42 125 Decl ("INT", ms)],
Chris@42 126 finalize_fcn body)
Chris@42 127 in
Chris@42 128 let twinstr =
Chris@42 129 Printf.sprintf "static const tw_instr twinstr[] = %s;\n\n"
Chris@42 130 (twinstr_to_string "(2 * VL)" (twdesc n))
Chris@42 131 and desc =
Chris@42 132 Printf.sprintf
Chris@42 133 "static const ct_desc desc = {%d, %s, twinstr, &GENUS, %s, %s, %s, %s};\n\n"
Chris@42 134 n (stringify name) (flops_of tree)
Chris@42 135 (stride_to_solverparm !urs) "0"
Chris@42 136 (stride_to_solverparm !ums)
Chris@42 137 and register =
Chris@42 138 match !ditdif with
Chris@42 139 | DIT -> "X(kdft_dit_register)"
Chris@42 140 | DIF -> "X(kdft_dif_register)"
Chris@42 141
Chris@42 142 in
Chris@42 143 let init =
Chris@42 144 "\n" ^
Chris@42 145 twinstr ^
Chris@42 146 desc ^
Chris@42 147 (declare_register_fcn name) ^
Chris@42 148 (Printf.sprintf "{\n%s(p, %s, &desc);\n}" register ename)
Chris@42 149 in
Chris@42 150
Chris@42 151 (unparse tree) ^ "\n" ^
Chris@42 152 (if !Magic.standalone then "" else init)
Chris@42 153
Chris@42 154
Chris@42 155 let main () =
Chris@42 156 begin
Chris@42 157 parse (speclist @ Twiddle.speclist) usage;
Chris@42 158 print_string (generate (check_size ()));
Chris@42 159 end
Chris@42 160
Chris@42 161 let _ = main()