109 lines
3 KiB
OCaml
109 lines
3 KiB
OCaml
(*
|
|
* 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
|
|
*
|
|
*)
|
|
|
|
type variable =
|
|
(* temporary variables generated automatically *)
|
|
| Temporary of int
|
|
(* memory locations, e.g., array elements *)
|
|
| Locative of (Unique.unique * Unique.unique *
|
|
(int -> string) * int * string)
|
|
(* constant values, e.g., twiddle factors *)
|
|
| Constant of (Unique.unique * string)
|
|
|
|
let hash v = Hashtbl.hash v
|
|
|
|
let same a b = (a == b)
|
|
|
|
let is_constant = function
|
|
| Constant _ -> true
|
|
| _ -> false
|
|
|
|
let is_temporary = function
|
|
| Temporary _ -> true
|
|
| _ -> false
|
|
|
|
let is_locative = function
|
|
| Locative _ -> true
|
|
| _ -> false
|
|
|
|
let same_location a b =
|
|
match (a, b) with
|
|
| (Locative (location_a, _, _, _, _), Locative (location_b, _, _, _, _)) ->
|
|
Unique.same location_a location_b
|
|
| _ -> false
|
|
|
|
let same_class a b =
|
|
match (a, b) with
|
|
| (Locative (_, class_a, _, _, _), Locative (_, class_b, _, _, _)) ->
|
|
Unique.same class_a class_b
|
|
| (Constant (class_a, _), Constant (class_b, _)) ->
|
|
Unique.same class_a class_b
|
|
| _ -> false
|
|
|
|
let make_temporary =
|
|
let tmp_count = ref 0
|
|
in fun () -> begin
|
|
tmp_count := !tmp_count + 1;
|
|
Temporary !tmp_count
|
|
end
|
|
|
|
let make_constant class_token name =
|
|
Constant (class_token, name)
|
|
|
|
let make_locative location_token class_token name i vs =
|
|
Locative (location_token, class_token, name, i, vs)
|
|
|
|
let vstride_of_locative = function
|
|
| Locative (_, _, _, _, vs) -> vs
|
|
| _ -> failwith "vstride_of_locative"
|
|
|
|
(* special naming conventions for variables *)
|
|
let rec base62_of_int k =
|
|
let x = k mod 62
|
|
and y = k / 62 in
|
|
let c =
|
|
if x < 10 then
|
|
Char.chr (x + Char.code '0')
|
|
else if x < 36 then
|
|
Char.chr (x + Char.code 'a' - 10)
|
|
else
|
|
Char.chr (x + Char.code 'A' - 36)
|
|
in
|
|
let s = String.make 1 c in
|
|
let r = if y == 0 then "" else base62_of_int y in
|
|
r ^ s
|
|
|
|
let varname_of_int k =
|
|
if !Magic.compact then
|
|
base62_of_int k
|
|
else
|
|
string_of_int k
|
|
|
|
let unparse = function
|
|
| Temporary k -> "T" ^ (varname_of_int k)
|
|
| Constant (_, name) -> name
|
|
| Locative (_, _, name, i, _) -> name i
|
|
|
|
let unparse_for_alignment m = function
|
|
| Locative (_, _, name, i, _) -> name (i mod m)
|
|
| _ -> failwith "unparse_for_alignment"
|
|
|