(**************************************************************************)
(*     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 import Pervasives
open import Assert_extra
open Map

open import Sail2_values

type vl =
  | V_vector of list vl
  | V_list of list vl
  | V_bits of list bitU
  | V_bit of bitU
  | V_tuple of list vl
  | V_bool of bool
  | V_nondet (* Special nondeterministic boolean *)
  | V_unit
  | V_int of integer
  | V_string of string
  | V_ctor of string * list vl
  | V_ctor_kind of string
  | V_record of list (string * vl)
  | V_null (* Used for unitialized values and null pointers in C compilation *)

let string_of_value = function
  | V_bits bs -> show_bitlist bs ^ "ul"
  | V_int i -> show i ^ "l"
  | V_bool true -> "true"
  | V_bool false -> "false"
  | V_null -> "NULL"
  | V_unit -> "UNIT"
  | V_bit B0 -> "0ul"
  | V_bit B1 -> "1ul"
  | V_string str -> "\"" ^ str ^ "\""
  | _ -> failwith "Cannot convert value to string"
end

let primops extern args =
  match (extern, args) with
  | ("and_bool", [V_bool b1; V_bool b2]) -> V_bool (b1 && b2)
  | ("and_bool", [V_nondet; V_bool false]) -> V_bool false
  | ("and_bool", [V_bool false; V_nondet]) -> V_bool false
  | ("and_bool", _) -> V_nondet

  | ("or_bool", [V_bool b1; V_bool b2]) -> V_bool (b1 || b2)
  | ("or_bool", [V_nondet; V_bool true]) -> V_bool true
  | ("or_bool", [V_bool true; V_nondet]) -> V_bool true
  | ("or_bool", _) -> V_nondet

  | _ -> failwith ("Unimplemented primitive operation " ^ extern)
  end