Partial (rnrs arithmetic bitwise) support for Nyacc c99.

* module/rnrs/arithmetic/bitwise.mes: New file.

module/rnrs/arithmetic/bitwise.mes

@@ -0,0 +1,30 @@
+;;; -*-scheme-*-
+
+;;; Mes --- Maxwell Equations of Software
+;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;
+;;; This file is part of Mes.
+;;;
+;;; Mes 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 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; Mes 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 Mes.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(mes-use-module (mes scm))
+
+(define bitwise-arithmetic-shift ash)
+(define bitwise-arithmetic-shift-left bitwise-arithmetic-shift)
+(define (bitwise-arithmetic-shift-right n count)
+  (bitwise-arithmetic-shift n (- count)))