Skeleton of an Int36 class that may be used to support 36-bit integers in a PDP-10 simulation

2017-02-12 11:21:49 -08:00 · 2017-02-12 11:21:49 -08:00 · bfab39cf5a
commit bfab39cf5a
parent c119552c06
2 changed files with 407 additions and 0 deletions
--- a/modules/shared/bin/int36
+++ b/modules/shared/bin/int36
@ -0,0 +1,129 @@
+#!/usr/bin/env node
+/**
+ * @fileoverview Test the Int36 class
+ * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
+ * @copyright © Jeff Parsons 2012-2017
+ * @suppress {missingProperties}
+ *
+ * This file is part of PCjs, a computer emulation software project at <http://pcjs.org/>.
+ *
+ * PCjs 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.
+ *
+ * PCjs 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 PCjs.  If not,
+ * see <http://www.gnu.org/licenses/gpl.html>.
+ *
+ * You are required to include the above copyright notice in every modified copy of this work
+ * and to display that copyright notice when the software starts running; see COPYRIGHT in
+ * <http://pcjs.org/modules/shared/lib/defines.js>.
+ *
+ * Some PCjs files also attempt to load external resource files, such as character-image files,
+ * ROM files, and disk image files. Those external resource files are not considered part of PCjs
+ * for purposes of the GNU General Public License, and the author does not claim any copyright
+ * as to their contents.
+ */
+
+"use strict";
+
+var repl = require("repl");
+var Defines = require("../../shared/lib/defines");
+var Int36 = require("../../shared/lib/int36");
+
+var i36Reg = new Int36();
+
+/**
+ * dumpInt36(i36)
+ *
+ * @param {Int36} i36
+ * @return {string}
+ */
+function dumpInt36(i36)
+{
+    return i36.toString() + " (" + i36.toString(8, true) + ")";
+}
+
+/**
+ * test(sCmd, fREPL)
+ *
+ * @param {string} sCmd
+ * @param {boolean} [fREPL]
+ * @return {*}
+ */
+function test(sCmd, fREPL)
+{
+    var aTokens = sCmd.split(' ');
+
+    var sOp = aTokens[0];
+    var sNum1 = aTokens[1] && aTokens[1].replace(/,/g, '');
+    var sNum2 = aTokens[2];
+
+    var i36Op = new Int36(+sNum1);
+
+    switch(sOp) {
+    case "set":
+        i36Reg = new Int36(+sNum1, +sNum2);
+        break;
+
+    case "add":
+        i36Reg.add(i36Op);
+        break;
+
+    case "sub":
+        i36Reg.sub(i36Op);
+        break;
+
+    case "mul":
+        i36Reg.mul(i36Op);
+        break;
+
+    case "div":
+        i36Reg.div(i36Op);
+        break;
+
+    case "print":
+        break;
+
+    default:
+        console.log("unrecognized command: " + sCmd);
+        return false;
+    }
+
+    console.log(sOp + (sNum1? (" " + dumpInt36(i36Op)) : "") + ": " + dumpInt36(i36Reg));
+
+    return true;
+}
+
+/**
+ * onCommand(cmd, context, filename, callback)
+ *
+ * @param {string} cmd
+ * @param {Object} context
+ * @param {string} filename
+ * @param {function(Object|null, Object)} callback
+ */
+var onCommand = function (cmd, context, filename, callback)
+{
+    var result = false;
+    var match = cmd.match(/^\(?\s*([\S\s]*?)\s*\)?$/);
+    if (match && match[1]) result = test(match[1], true);
+    callback(null, result);
+};
+
+test("set -34,359,738,368");
+test("add 1");
+test("sub 1");
+test("sub 1");
+test("add 1");
+test("add 0");
+
+repl.start({
+    prompt: "int36> ",
+    input: process.stdin,
+    output: process.stdout,
+    eval: onCommand
+});