Simplify prelude.sail by including generic_equality.sail and mapping.sail

This change includes `generic_equality.sail` and `mapping.sail` from the Sail standard library which defines a lot of things that were defined in `prelude.sail`.

I also removed `reg_deref` which is no longer required.

The `mapping.sail` and `hex_bits.sail` files are in Sail 0.18 which is not yet released, so they have been temporarily copied here.

1 files changed, 136 insertions, 0 deletions

diff --git a/model/mapping.sail b/model/mapping.sail
new file mode 100644
index 0000000..ec8b759
--- /dev/null
+++ b/model/mapping.sail
@@ -0,0 +1,136 @@
+// Note: This file is temporarily copied here from the Sail compiler. It can
+// be removed when Sail 0.18 is released.
+
+/*==========================================================================*/
+/*     Sail                                                                 */
+/*                                                                          */
+/*  Sail and the Sail architecture models here, comprising all files and    */
+/*  directories except the ASL-derived Sail code in the aarch64 directory,  */
+/*  are subject to the BSD two-clause licence below.                        */
+/*                                                                          */
+/*  The ASL derived parts of the ARMv8.3 specification in                   */
+/*  aarch64/no_vector and aarch64/full are copyright ARM Ltd.               */
+/*                                                                          */
+/*  Copyright (c) 2013-2021                                                 */
+/*    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                                                          */
+/*    Alastair Reid (Arm Ltd)                                               */
+/*                                                                          */
+/*  All rights reserved.                                                    */
+/*                                                                          */
+/*  This work was partially supported by EPSRC grant EP/K008528/1 <a        */
+/*  href="http://www.cl.cam.ac.uk/users/pes20/rems">REMS: Rigorous          */
+/*  Engineering for Mainstream Systems</a>, an ARM iCASE award, EPSRC IAA   */
+/*  KTF funding, and donations from Arm.  This project has received         */
+/*  funding from the European Research Council (ERC) under the European     */
+/*  Union’s Horizon 2020 research and innovation programme (grant           */
+/*  agreement No 789108, ELVER).                                            */
+/*                                                                          */
+/*  This software was developed by SRI International and the University of  */
+/*  Cambridge Computer Laboratory (Department of Computer Science and       */
+/*  Technology) under DARPA/AFRL contracts FA8650-18-C-7809 ("CIFV")        */
+/*  and FA8750-10-C-0237 ("CTSRD").                                         */
+/*                                                                          */
+/*  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.                                                            */
+/*==========================================================================*/
+
+$ifndef _MAPPING
+$define _MAPPING
+
+$include <arith.sail>
+$include <option.sail>
+
+val string_take = pure "string_take" : (string, nat) -> string
+val string_drop = pure "string_drop" : (string, nat) -> string
+val string_length = pure "string_length" : string -> nat
+val string_append = pure {coq: "String.append", c: "concat_str", _: "string_append"} : (string, string) -> string
+val string_startswith = pure "string_startswith" : (string, string) -> bool
+
+val n_leading_spaces = pure { coq: "n_leading_spaces_Z" } : string -> nat
+function n_leading_spaces s =
+  match s {
+    "" => 0,
+    _ => match string_take(s, 1) {
+      " " => 1 + n_leading_spaces(string_drop(s, 1)),
+      _ => 0
+    }
+  }
+
+/*!
+In a string mapping this is treated as `[ ]+`, i.e one or more space
+characters. It is printed as a single space `" "`.
+*/
+val spc : unit <-> string
+
+function spc_forwards() = " "
+function spc_forwards_matches() = true
+
+function spc_backwards _ = ()
+function spc_backwards_matches s = {
+  let len = string_length(s);
+  n_leading_spaces(s) == len & len > 0
+}
+
+/*!
+In a string mapping this is treated as `[ ]*`, i.e. zero or more space
+characters. It is printed as the empty string.
+*/
+val opt_spc : unit <-> string
+
+function opt_spc_forwards() = ""
+function opt_spc_forwards_matches() = true
+
+function opt_spc_backwards _ = ()
+function opt_spc_backwards_matches s = n_leading_spaces(s) == string_length(s)
+
+/*!
+Like `opt_spc`, in a string mapping this is treated as `[ ]*`, i.e. zero or more space
+characters. It differs however in that it is printed as a single space `" "`.
+*/
+val def_spc : unit <-> string
+
+function def_spc_forwards() = " "
+function def_spc_forwards_matches() = true
+
+function def_spc_backwards _ = ()
+function def_spc_backwards_matches s = n_leading_spaces(s) == string_length(s)
+
+mapping sep : unit <-> string = {
+  () <-> opt_spc() ^ "," ^ def_spc()
+}
+
+$endif