Add a stub file for future cgen generations

1 files changed, 77 insertions, 0 deletions

diff --git a/src/cgen_backend.ml b/src/cgen_backend.ml
new file mode 100644
index 00000000..77029c9e
--- /dev/null
+++ b/src/cgen_backend.ml
@@ -0,0 +1,77 @@
+(**************************************************************************)
+(*     Sail                                                               *)
+(*                                                                        *)
+(*  Copyright (c) 2013-2017                                               *)
+(*    Kathyrn Gray                                                        *)
+(*    Shaked Flur                                                         *)
+(*    Stephen Kell                                                        *)
+(*    Gabriel Kerneis                                                     *)
+(*    Robert Norton-Wright                                                *)
+(*    Christopher Pulte                                                   *)
+(*    Peter Sewell                                                        *)
+(*    Alasdair Armstrong                                                  *)
+(*    Brian Campbell                                                      *)
+(*    Thomas Bauereiss                                                    *)
+(*    Anthony Fox                                                         *)
+(*    Jon French                                                          *)
+(*    Dominic Mulligan                                                    *)
+(*    Stephen Kell                                                        *)
+(*    Mark Wassell                                                        *)
+(*                                                                        *)
+(*  All rights reserved.                                                  *)
+(*                                                                        *)
+(*  This software was developed by the University of Cambridge Computer   *)
+(*  Laboratory as part of the Rigorous Engineering of Mainstream Systems  *)
+(*  (REMS) project, funded by EPSRC grant EP/K008528/1.                   *)
+(*                                                                        *)
+(*  Redistribution and use in source and binary forms, with or without    *)
+(*  modification, are permitted provided that the following conditions    *)
+(*  are met:                                                              *)
+(*  1. Redistributions of source code must retain the above copyright     *)
+(*     notice, this list of conditions and the following disclaimer.      *)
+(*  2. Redistributions in binary form must reproduce the above copyright  *)
+(*     notice, this list of conditions and the following disclaimer in    *)
+(*     the documentation and/or other materials provided with the         *)
+(*     distribution.                                                      *)
+(*                                                                        *)
+(*  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''    *)
+(*  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED     *)
+(*  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A       *)
+(*  PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR   *)
+(*  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,          *)
+(*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT      *)
+(*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF      *)
+(*  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND   *)
+(*  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,    *)
+(*  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT    *)
+(*  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF    *)
+(*  SUCH DAMAGE.                                                          *)
+(**************************************************************************)
+
+open Ast
+open Ast_util
+open PPrint
+
+let to_string doc =
+  let b = Buffer.create 120 in
+  ToBuffer.pretty 1. 120 b doc;
+  Buffer.contents b
+
+let do_mapdef_thing (MD_aux (MD_mapping (_, _, clauses), _)) =
+  print_endline ("Mapping has " ^ string_of_int (List.length clauses) ^ " clauses")
+
+let rec list_registers = function
+  | [] -> ()
+  | (DEF_reg_dec reg) :: defs ->
+     print_endline (to_string (Pretty_print_sail.doc_dec reg));
+     list_registers defs
+  | (DEF_mapdef mapdef) :: defs ->
+     do_mapdef_thing mapdef;
+     list_registers defs
+  | def :: defs ->
+     list_registers defs
+
+let output env (Defs defs) =
+  let xlenbits = mk_typ (Typ_id (mk_id "xlenbits")) in
+  print_endline (string_of_typ (Type_check.Env.expand_synonyms env xlenbits));
+  list_registers defs