RISCV Sail Model

This Sail RISC-V architecture model, comprising all files and
directories except for the snapshots of the Lem and Sail libraries
in the prover_snapshots directory (which include copies of their
licences), is subject to the BSD two-clause licence below.

Copyright (c) 2017-2021
  Prashanth Mundkur
  Rishiyur S. Nikhil and Bluespec, Inc.
  Jon French
  Brian Campbell
  Robert Norton-Wright
  Alasdair Armstrong
  Thomas Bauereiss
  Shaked Flur
  Christopher Pulte
  Peter Sewell
  Alexander Richardson 
  Hesham Almatary 
  Jessica Clarke
  Microsoft, for contributions by Robert Norton-Wright and Nathaniel Wesley Filardo
  Peter Rugg
  Aril Computer Corp., for contributions by Scott Johnson

All rights reserved.

This software was developed by the above within the Rigorous
Engineering of Mainstream Systems (REMS) project, partly funded by
EPSRC grant EP/K008528/1, at the Universities of Cambridge and
Edinburgh.

This software was developed by SRI International and the University of
Cambridge Computer Laboratory (Department of Computer Science and
Technology) under DARPA/AFRL contract FA8650-18-C-7809 ("CIFV"), and
under DARPA contract HR0011-18-C-0016 ("ECATS") as part of the DARPA
SSITH research programme.

This project has received funding from the European Research Council
(ERC) under the European Union’s Horizon 2020 research and innovation
programme (grant agreement 789108, ELVER).


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.