1109 lines
36 KiB
JavaScript
1109 lines
36 KiB
JavaScript
/**
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* @fileoverview My homage to MACRO-10: a work-alike assembler for the PDP-10
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* @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
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* @copyright © Jeff Parsons 2012-2017
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*
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* This file is part of PCjs, a computer emulation software project at <http://pcjs.org/>.
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*
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* PCjs is free software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation, either version 3
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* of the License, or (at your option) any later version.
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*
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* PCjs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCjs. If not,
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* see <http://www.gnu.org/licenses/gpl.html>.
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*
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* You are required to include the above copyright notice in every modified copy of this work
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* and to display that copyright notice when the software starts running; see COPYRIGHT in
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* <http://pcjs.org/modules/shared/lib/defines.js>.
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*
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* Some PCjs files also attempt to load external resource files, such as character-image files,
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* ROM files, and disk image files. Those external resource files are not considered part of PCjs
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* for purposes of the GNU General Public License, and the author does not claim any copyright
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* as to their contents.
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*/
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"use strict";
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if (NODE) {
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var Str = require("../../shared/lib/strlib");
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var Web = require("../../shared/lib/weblib");
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var Debugger = require("../../shared/lib/debugger");
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var PDP10 = require("./defines");
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var DebuggerPDP10 = require("./debugger");
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}
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/**
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* Elements of tblMacros.
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*
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* @typedef {{
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* name:(string),
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* nOperand:(number),
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* aParms:(Array.<string>),
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* aDefaults:(Array.<string>),
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* sText:(string),
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* nLine:(number)
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* }}
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*/
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var Mac;
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/**
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* Elements of tblSymbols.
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*
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* @typedef {{
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* name:(string),
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* value:(number),
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* nLine:(number),
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* fLabel:(boolean),
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* fGlobal:(boolean),
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* fPrivate:(boolean)
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* }}
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*/
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var Sym;
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/**
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* @typedef {{
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* nLocation:(number),
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* sValue:(string)
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* }}
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*/
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var Fixup;
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/**
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* @class Macro10
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* @property {string} sURL
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* @property {number} nAddr
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* @property {string} sOptions
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* @property {DebuggerPDP10} dbg
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* @property {function(...)} done
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* @property {string} sText
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* @property {number} iURL
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* @property {Array.<string>} asURLs
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*/
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class Macro10 {
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/**
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* Macro10(sURL, nAddr, sOptions, dbg, done)
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*
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* A "mini" version of DEC's MACRO-10 assembler, with just enough features to support the handful
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* of DEC diagnostic source code files that we choose to throw at it.
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*
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* Requests the resource(s) specified by sURL; multiple resources can be requested by separating
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* them with semicolons.
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*
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* The done() callback is called after the resource(s) have been loaded and parsed. The caller
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* must use other methods to obtain further results (eg, getBin()).
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*
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* The callback includes a non-zero error code if there was an error (and the URL):
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*
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* done(nErrorCode, sURL)
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*
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* We rely on the calling component (dbg) to provide a variety of helper services (eg, println(),
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* parseExpression(), etc). This is NOT a subclass of Component, so Component services are not part
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* of this class.
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*
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* @this {Macro10}
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* @param {string} sURL (the URL(s) of the resource to be assembled)
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* @param {number|null} nAddr (the absolute address to assemble the code at, if any)
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* @param {string|null} sOptions (zero or more letter codes to control the assembly process)
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* @param {DebuggerPDP10} dbg (used to provide helper services to the Macro10 class)
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* @param {function(...)} done
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*/
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constructor(sURL, nAddr, sOptions, dbg, done)
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{
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this.sURL = sURL;
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this.nAddr = nAddr || 0;
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this.sOptions = sOptions || "";
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this.dbg = dbg;
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this.done = done;
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/*
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* Set up shortcuts to frequently used helper services that the caller must provide.
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*/
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this.println = dbg.println;
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/*
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* Initialize all the tables that MACRO-10 uses.
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*
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* The Macros (tblMacros) and Symbols (tblSymbols) tables are fairly straightforward: they are
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* indexed by a macro or symbol name, and each element is a Mac or Sym object, respectively.
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*
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* We also treat REPEAT blocks and CONDITIONAL (eg, IFE) blocks like macros, except that they are
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* anonymous, parameter-less, and immediately invoked. REPEAT blocks are always immediately invoked
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* (repeatedly, based on the repeat count), whereas CONDITIONAL blocks are either immediately
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* invoked if the associated condition is true or skipped if the condition is false.
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*
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* Finally, we have LITERAL blocks, which are semi-anonymous (we give each one an auto-generated
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* name based on the current location) and are automatically but not immediately invoked. Instead,
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* after we've finished processing all the lines in the original input file, we run through all
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* the LITERAL blocks in tblMacros and process the associated statement(s) at that time.
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*
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* Macros have the name that was assigned to them, REPEAT and conditional blocks have generated names
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* that match the pseudo-op (eg, "_REPEAT", "_IFE"), and LITERAL blocks have generated location-based
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* names. All generated names use a leading underscore ('_') so that they don't conflict with
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* normal MACRO-10 labels.
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*/
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/**
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* @type {Object.<Mac>}
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*/
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this.tblMacros = {};
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/**
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* @type {Object.<Sym>}
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*/
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this.tblSymbols = {};
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/**
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* @type {Array.<string>}
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*
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* This array is mostly a convenience; we could also enumerate all the literals by walking tblMacros
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* and looking for elements with MACRO_OP.LITERAL, but the ordering wouldn't necessarily match the order
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* in which the literals were defined.
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*/
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this.aLiterals = [];
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/**
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* @type {Array.<Fixup>}
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*/
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this.aFixups = [];
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/**
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* @type {Array.<number|undefined>}
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*/
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this.aWords = []; // filled in by the various genXXX() functions
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this.nLine = 0;
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this.nError = 0;
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this.nLocation = this.nAddr; // advanced by the various genXXX() functions
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this.sOperator = null; // the active operator, if any
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this.nMacroDef = 0; // the active MACRO definition state
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this.sMacroDef = null; // the active MACRO definition name
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this.chMacroOpen = this.chMacroClose = '';
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/**
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* If an ASCII/ASCIZ/SIXBIT pseudo-op is active, chASCII is set to the separator
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* and sASCII collects the intervening character(s).
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*
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* @type {null|string}
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*/
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this.chASCII = null;
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/**
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* @type {string}
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*/
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this.sASCII = "";
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this.sText = "";
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this.iURL = 0;
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this.asURLs = sURL.split(';');
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this.loadNextResource();
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}
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/**
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* loadNextResource()
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*
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* @this {Macro10}
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*/
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loadNextResource()
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{
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if (this.iURL == this.asURLs.length) {
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this.done(this.parseFile());
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return;
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}
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var macro10 = this;
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Web.getResource(this.asURLs[this.iURL++], null, true, function processMacro10(sURL, sResource, nErrorCode) {
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if (nErrorCode) {
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macro10.done(nErrorCode, sURL);
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return;
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}
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var sText = sResource;
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if (Str.endsWith(sURL, ".html")) {
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/*
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* We want to parse ONLY the text between <PRE>...</PRE> tags, and eliminate any HTML entities.
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*/
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sText = "";
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var match, re = /<pre>([\s\S]*?)<\/pre>/gi;
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while (match = re.exec(sResource)) {
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var s = match[1];
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if (s.indexOf('&') >= 0) s = s.replace(/</gi, '<').replace(/>/gi, '>').replace(/&/gi, '&');
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sText += s;
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}
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match = sText.match(/&[a-z]+;/i);
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if (match) macro10.warning("unrecognized HTML entity: " + match[0]);
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}
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if (macro10.sText) macro10.sText += '\n';
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macro10.sText += sText;
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setTimeout(function() {
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macro10.loadNextResource();
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}, 0);
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});
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}
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/**
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* getBin()
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*
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* Service for the Debugger to obtain the data after a (hopefully) successful assembly process.
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*
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* @this {Macro10}
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* @return {Array.<number>}
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*/
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getBin()
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{
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return this.aWords;
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}
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/**
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* parseFile()
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*
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* Begin the assembly process.
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*
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* @this {Macro10}
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* @return {number}
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*/
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parseFile()
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{
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var macro10 = this;
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/*
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* If the "preprocess" option is set, then just return the plain text we retrieved.
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*/
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if (this.sOptions.indexOf('p') >= 0) {
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this.println(this.sText);
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return 0;
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}
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var a = this.dbg.resetVariables();
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try {
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var i;
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var asLines = this.sText.split(/\r?\n/);
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for (i = 0; i < asLines.length; i++) {
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this.nLine++;
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if (!this.parseLine(asLines[i] + '\r\n')) break;
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}
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if (this.nMacroDef) {
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this.error("open block from line " + this.tblMacros[this.sMacroDef].nLine);
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}
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for (i = 0; i < this.aLiterals.length; i++) {
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var name = this.aLiterals[i];
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var macro = this.tblMacros[name];
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if (!macro) {
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/*
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* This is more of an assert(), because it should never happen, regardless of input.
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*/
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this.error("missing definition for literal: " + name);
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continue;
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}
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this.parseText(macro.sText);
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}
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this.aFixups.forEach(function processFixup(fixup){
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var nLocation = fixup.nLocation;
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var value = macro10.parseExpression(fixup.sValue, undefined, nLocation);
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if (value === undefined) {
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macro10.error("unable to parse expression: " + fixup.sValue);
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return;
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}
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value += macro10.aWords[nLocation];
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macro10.aWords[nLocation] = macro10.truncate(value, nLocation);
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});
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} catch(err) {
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this.println(err.message);
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this.nError = -1;
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}
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this.dbg.restoreVariables(a);
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return this.nError;
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}
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/**
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* parseLine(sLine)
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*
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* @this {Macro10}
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* @param {string} sLine (line contents)
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* @return {boolean}
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*/
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parseLine(sLine)
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{
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if (this.nMacroDef) {
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if (this.nMacroDef == 1) {
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var i = sLine.indexOf(this.chMacroOpen);
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if (i >= 0) {
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this.nMacroDef++;
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sLine = sLine.substr(i+1);
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} else {
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this.error("expected " + this.sOperator + " definition: " + sLine);
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}
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}
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if (this.nMacroDef > 1) {
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sLine = this.appendMacro(sLine);
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}
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if (this.nMacroDef) return true;
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}
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if (this.chASCII != null) {
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sLine = this.addASCII(sLine);
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}
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var reLine = /\s*([A-Z$%._][0-9A-Z$%.]*[:=]|)\s*([A-Z$%.][0-9A-Z$%.]*|)\s*([^;]+|)(;?[\s\S]*)/i;
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var match = sLine.match(reLine);
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if (!match || match[4] && match[4].slice(0, 1) != ';') {
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this.error("failed to parse line: " + sLine);
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return false;
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}
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var sLabel = match[1];
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var sOperator = match[2].toUpperCase();
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var sOperands = match[3].trim();
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var sComment = match[4];
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var sRemainder = match[3] + match[4];
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if (sLabel) {
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var chSep = sLabel.slice(-1);
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sLabel = sLabel.slice(0, -1);
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if (chSep == ':') {
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this.addLabel(sLabel);
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} else {
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sOperands = sOperator + sOperands;
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sOperator = chSep;
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}
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}
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if (!sOperator && !sOperands) return true;
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/*
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* My initial read of the MACRO-10 specification suggested that lines may begin with EITHER
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* "symbol:" (for a label) or "symbol=" (for an assignment), but apparently they can have BOTH.
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*/
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if (sOperands[0] == '=') {
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sLabel = sOperator;
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sOperands = sOperands.substr(1);
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sOperator = '=';
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}
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this.sOperator = sOperator;
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/*
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* Check the operands for a literal. If the line contains and/or ends with a literal
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* we record it and replace it with an internal symbol. We assume only one literal per line,
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* especially since they can be open-ended (ie, continue for multiple lines).
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*/
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var sLiteral = this.getLiteral(sOperands);
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if (sLiteral) {
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sOperands = sOperands.replace(sLiteral, this.addMacro(Macro10.PSEUDO_OP.LITERAL, sLiteral));
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}
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/*
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* Check the operands for any reserved symbols (ie, symbols with a trailing '#', such as "USER#").
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*/
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var sSymbol;
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while (sSymbol = this.getReserved(sOperands)) {
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sOperands = sOperands.replace(sSymbol, sSymbol.slice(0, -1));
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}
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if (!this.parseMacro(sOperator, sOperands)) {
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switch (sOperator) {
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case "=":
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this.addAssign(sLabel, sOperands);
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break;
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case Macro10.PSEUDO_OP.ASCII:
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case Macro10.PSEUDO_OP.ASCIZ:
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case Macro10.PSEUDO_OP.SIXBIT:
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this.addASCII(sRemainder);
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break;
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case Macro10.PSEUDO_OP.XWD:
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this.addXWD(sOperands);
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break;
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case Macro10.PSEUDO_OP.DEFINE:
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case Macro10.PSEUDO_OP.IFE:
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case Macro10.PSEUDO_OP.REPEAT:
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this.addMacro(sOperator, sOperands);
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break;
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case Macro10.PSEUDO_OP.PAGE: // TODO
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case Macro10.PSEUDO_OP.SUBTTL: // TODO
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break;
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default:
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this.addWord(sOperator, sOperands);
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break;
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}
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}
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return true;
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}
|
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|
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/**
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* parseMacro(name, sOperands)
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*
|
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* @this {Macro10}
|
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* @param {string} name
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* @param {string} [sOperands]
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* @return {boolean}
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*/
|
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parseMacro(name, sOperands)
|
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{
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var macro = this.tblMacros[name];
|
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if (!macro) return false;
|
|
|
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if (sOperands != null) {
|
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/*
|
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* Process this macro call; start by extracting macro argument values from sOperands.
|
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*/
|
|
var sDelim = ',';
|
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if (sOperands[0] == '(') {
|
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sDelim += ')';
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sOperands = sOperands.substr(1);
|
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}
|
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var aValues = this.getValues(sOperands, sDelim);
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this.parseText(macro.sText, macro.aParms, aValues);
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return true;
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}
|
|
|
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if (name[0] != '_') return false;
|
|
|
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switch(name.substr(1)) {
|
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case Macro10.PSEUDO_OP.IFE:
|
|
if (!macro.nOperand) {
|
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this.parseText(macro.sText);
|
|
}
|
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break;
|
|
|
|
case Macro10.PSEUDO_OP.REPEAT:
|
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while (macro.nOperand-- > 0) {
|
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this.parseText(macro.sText);
|
|
}
|
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break;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* isSymbolChar(ch)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} ch
|
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* @return {boolean}
|
|
*/
|
|
isSymbolChar(ch)
|
|
{
|
|
return !!ch.match(/[0-9A-Z$%.]/i);
|
|
}
|
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|
|
/**
|
|
* parseText(sText, aParms, aValues)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sText
|
|
* @param {Array.<string>} [aParms]
|
|
* @param {Array.<string>} [aValues]
|
|
*/
|
|
parseText(sText, aParms, aValues)
|
|
{
|
|
var asLines = sText.split(/\r?\n/);
|
|
for (var iLine = 0; iLine < asLines.length; iLine++) {
|
|
var sLine = asLines[iLine] + '\r\n';
|
|
if (aParms) {
|
|
for (var iParm = 0; iParm < aParms.length; iParm++) {
|
|
var sParm = aParms[iParm];
|
|
var sReplace = aValues[iParm] || "";
|
|
var iSearch = 0;
|
|
while (true) {
|
|
var iMatch = sLine.indexOf(sParm, iSearch);
|
|
if (iMatch < 0) break;
|
|
iSearch = iMatch + 1;
|
|
var iMatchEnd = iMatch + sParm.length;
|
|
if ((!iMatch || !this.isSymbolChar(sLine[iMatch - 1])) && (iMatchEnd >= sLine.length || !this.isSymbolChar(sLine[iMatchEnd]))) {
|
|
sLine = sLine.substr(0, iMatch) + sReplace + sLine.substr(iMatchEnd);
|
|
iSearch = iMatch + sReplace.length;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (!this.parseLine(sLine)) break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* error(sError)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sError
|
|
*/
|
|
error(sError)
|
|
{
|
|
throw new Error("error" + (this.nLine? " at line " + Str.toDec(this.nLine) : "") + ": " + sError);
|
|
}
|
|
|
|
/**
|
|
* warning(sWarning)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sWarning
|
|
*/
|
|
warning(sWarning)
|
|
{
|
|
this.println("warning" + (this.nLine? " at line " + Str.toDec(this.nLine) : "") + ": " + sWarning);
|
|
}
|
|
|
|
/**
|
|
* getExpression(sOperands, sDelim)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sOperands
|
|
* @param {string} [sDelim] (eg, comma, closing parenthesis)
|
|
* @return {string|null} (if the operands begin with an expression, return it)
|
|
*/
|
|
getExpression(sOperands, sDelim = ",")
|
|
{
|
|
var i = 0;
|
|
var sOperand = null;
|
|
var cNesting = 0;
|
|
while (i < sOperands.length) {
|
|
var ch = sOperands[i];
|
|
if (sDelim.indexOf(ch) >= 0) {
|
|
break;
|
|
}
|
|
if (ch == '<') {
|
|
cNesting++;
|
|
} else if (ch == '>') {
|
|
if (--cNesting < 0) {
|
|
this.error("missing bracket(s): " + sOperands);
|
|
break;
|
|
}
|
|
}
|
|
i++;
|
|
}
|
|
if (!cNesting) {
|
|
sOperand = sOperands.substr(0, i);
|
|
}
|
|
else if (cNesting > 0) {
|
|
this.error("extra bracket(s): " + sOperands);
|
|
}
|
|
return sOperand;
|
|
}
|
|
|
|
/**
|
|
* parseExpression(sOperand, fPass1, nLocation)
|
|
*
|
|
* This is a wrapper around the Debugger's parseExpression() function to take care of some
|
|
* additional requirements we have, such as interpreting a period as the current location and
|
|
* interpreting two expressions separated by two commas as the left and right 18-bit halves
|
|
* of a 36-bit value.
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sOperand
|
|
* @param {boolean|undefined} [fPass1]
|
|
* @param {number|undefined} [nLocation]
|
|
* @return {number|undefined}
|
|
*/
|
|
parseExpression(sOperand, fPass1, nLocation)
|
|
{
|
|
var result;
|
|
/*
|
|
* Check for the "double comma" syntax that MACRO-10 uses to express a 36-bit value as two 18-bit halves,
|
|
* and invoke ourselves recursively for each half.
|
|
*/
|
|
var match = sOperand.match(/^([^,]*),,([^,]*)$/);
|
|
if (!match) {
|
|
if (nLocation === undefined) nLocation = this.nLocation;
|
|
/*
|
|
* Check for the "period" syntax that MACRO-10 uses to represent the value of the current location.
|
|
* The Debugger's parseInstruction() method understands that syntax, but its parseExpression() method
|
|
* does not.
|
|
*
|
|
* Note that the Debugger's parseInstruction() replaces any period not PRECEDED by a decimal
|
|
* digit with the current address, because our Debuggers' only other interpretation of a period
|
|
* is as the suffix of a decimal integer, whereas MACRO-10's only other interpretation of a period
|
|
* is (I think) as the decimal point within a floating-point number, so here we only replace
|
|
* periods that are not FOLLOWED by a decimal digit.
|
|
*/
|
|
result = this.dbg.parseExpression(sOperand.replace(/\.([^0-9]|$)/g, this.dbg.toStrBase(nLocation, -1) + "$1"), fPass1);
|
|
if (result === undefined) {
|
|
this.error("error parsing expression: " + sOperand);
|
|
}
|
|
} else {
|
|
var wLeft = match[1]? this.parseExpression(match[1]) : 0;
|
|
if (wLeft !== undefined) {
|
|
var wRight = match[2]? this.parseExpression(match[2]) : 0;
|
|
if (wRight !== undefined) {
|
|
/*
|
|
* NOTE: These must be combined as UNSIGNED values, so that's what we tell truncate() to produce.
|
|
*/
|
|
result = this.dbg.truncate(wLeft, 18, true) * Math.pow(2, 18) + this.dbg.truncate(wRight, 18, true);
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* getLiteral(sOperands)
|
|
*
|
|
* Check the operands for a literal (ie, an expression starting with a square bracket).
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sOperands
|
|
* @return {string|null} (if the operands contain a literal, return it)
|
|
*/
|
|
getLiteral(sOperands)
|
|
{
|
|
var cNesting = 0;
|
|
var sLiteral = null;
|
|
var i = 0, iLiteral = -1;
|
|
while (i < sOperands.length) {
|
|
var ch = sOperands[i];
|
|
if (ch == '[') {
|
|
if (!cNesting++) iLiteral = i;
|
|
}
|
|
i++;
|
|
if (ch == ']' && --cNesting <= 0) break;
|
|
}
|
|
if (cNesting < 0) {
|
|
this.error("missing bracket(s): " + sOperands);
|
|
}
|
|
if (iLiteral >= 0) {
|
|
sLiteral = sOperands.substr(iLiteral, i - iLiteral);
|
|
}
|
|
return sLiteral;
|
|
}
|
|
|
|
/**
|
|
* getReserved(sOperands)
|
|
*
|
|
* Check the operands for any reserved symbols (ie, symbols with a trailing '#', such as "USER#").
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sOperands
|
|
* @return {string|null} (if the operands contain a reserved symbol, return it)
|
|
*/
|
|
getReserved(sOperands)
|
|
{
|
|
var match, sReserved = null;
|
|
if (match = sOperands.match(/([A-Z$%.][0-9A-Z$%.]*)#/i)) {
|
|
sReserved = match[0];
|
|
var sLabel = match[1];
|
|
var name = '_' + sLabel;
|
|
if (this.tblMacros[name] !== undefined) {
|
|
this.error("reserved symbol redefined: " + sReserved);
|
|
}
|
|
this.tblMacros[name] = {
|
|
name: name,
|
|
nOperand: Macro10.MACRO_OP.RESERVED,
|
|
aParms: [],
|
|
aDefaults: [],
|
|
sText: sLabel + ": 0",
|
|
nLine: this.nLine
|
|
};
|
|
this.aLiterals.push(name);
|
|
}
|
|
return sReserved;
|
|
}
|
|
|
|
/**
|
|
* getValues(sOperands, sDelim)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sOperands
|
|
* @param {string} [sDelim]
|
|
* @return {Array.<string>}
|
|
*/
|
|
getValues(sOperands, sDelim)
|
|
{
|
|
var aValues = [];
|
|
while (sOperands) {
|
|
sOperands = sOperands.trim();
|
|
var sOperand = this.getExpression(sOperands, sDelim);
|
|
if (!sOperand) break;
|
|
aValues.push(sOperand);
|
|
sOperands = sOperands.substr(sOperand.length + 1);
|
|
}
|
|
return aValues;
|
|
}
|
|
|
|
/**
|
|
* addASCII(sOperands)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sOperands
|
|
* @return {string} (returns whatever portion of the string was not part of an ASCII pseudo-op)
|
|
*/
|
|
addASCII(sOperands)
|
|
{
|
|
var sRemain = sOperands;
|
|
if (this.chASCII == null) {
|
|
this.chASCII = this.sASCII = "";
|
|
if (sOperands) {
|
|
this.chASCII = sOperands[0];
|
|
sRemain = sOperands = sOperands.substr(1);
|
|
}
|
|
}
|
|
if (this.chASCII) {
|
|
var i = sOperands.indexOf(this.chASCII);
|
|
if (i < 0) {
|
|
sRemain = "";
|
|
} else {
|
|
sRemain = sOperands.substr(i + 1);
|
|
sOperands = sOperands.substr(0, i);
|
|
this.chASCII = null;
|
|
}
|
|
this.sASCII += sOperands;
|
|
}
|
|
if (this.chASCII == null) {
|
|
this.genASCII();
|
|
}
|
|
return sRemain;
|
|
}
|
|
|
|
/**
|
|
* addAssign(sName, sOperand)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sName
|
|
* @param {string} sOperand
|
|
*/
|
|
addAssign(sName, sOperand)
|
|
{
|
|
var value = this.parseExpression(sOperand);
|
|
if (value === undefined) {
|
|
this.error("parseExpression(" + sOperand + ")");
|
|
return;
|
|
}
|
|
this.addSymbol(sName, value);
|
|
}
|
|
|
|
/**
|
|
* addLabel(sLabel)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sLabel
|
|
*/
|
|
addLabel(sLabel)
|
|
{
|
|
this.addSymbol(sLabel, this.nLocation, true);
|
|
}
|
|
|
|
/**
|
|
* addMacro(sOperator, sOperands)
|
|
*
|
|
* If sOperator is DEFINE, then a macro definition is expected. If it's REPEAT, then we're starting a
|
|
* REPEAT block instead.
|
|
*
|
|
* REPEAT blocks piggy-back on this code because they're essentially anonymous immediately-invoked macros;
|
|
* we use an illegal MACRO-10 symbol ('_REPEAT') to name the anonymous macro while it's being defined, and the
|
|
* macro's nOperand field will contain the repeat count.
|
|
*
|
|
* The piggy-backing continues with other pseudo-ops like IFE, which again contain an anonymous block of text
|
|
* that is immediately invoked if the criteria associated with the expression stored in the nOperand field is
|
|
* satisfied. That satisfaction occurs (or doesn't occur) when parseMacro() is called, once the macro has
|
|
* been fully defined.
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sOperator
|
|
* @param {string} sOperands
|
|
* @return {string}
|
|
*/
|
|
addMacro(sOperator, sOperands)
|
|
{
|
|
var match, name, nOperand, aParms, aDefaults, iMatch;
|
|
|
|
this.chMacroOpen = '<';
|
|
this.chMacroClose = '>';
|
|
aParms = aDefaults = [];
|
|
|
|
if (sOperator == Macro10.PSEUDO_OP.DEFINE) {
|
|
/*
|
|
* This is a DEFINE (macro) block.
|
|
*/
|
|
match = sOperands.match(/([A-Z$%.][0-9A-Z$%.]*)\s*(\([^)]*\)|)\s*(<|)(.*)/i);
|
|
if (!match) {
|
|
this.error("unrecognized " + sOperator + " definition: " + sOperands);
|
|
return "";
|
|
}
|
|
name = match[1];
|
|
/*
|
|
* TODO: This may not actually be an error, but I'd like to take a look if/when it happens.
|
|
*/
|
|
if (this.tblMacros[name] !== undefined) {
|
|
this.error("macro redefined: " + name);
|
|
}
|
|
/*
|
|
* TODO: Tighten up this parsing at some point. All this is doing is extracting entire symbols
|
|
* from within the parentheses, if any; it's NOT ensuring that those symbols are comma-separated
|
|
* with no other intervening characters.
|
|
*/
|
|
aParms = match[2].match(/[A-Z$%.][0-9A-Z$%.]*/g);
|
|
nOperand = Macro10.MACRO_OP.DEFINE;
|
|
iMatch = 3;
|
|
}
|
|
else if (sOperator == Macro10.PSEUDO_OP.LITERAL) {
|
|
/*
|
|
* This is a LITERAL block.
|
|
*/
|
|
this.chMacroOpen = '[';
|
|
this.chMacroClose = ']';
|
|
name = '_' + Str.toDec(this.nLocation, 5);
|
|
if (this.tblMacros[name] !== undefined) {
|
|
this.error("literal symbol redefined: " + name);
|
|
}
|
|
match = [sOperands[0], name + ": " + sOperands.substr(1)];
|
|
nOperand = Macro10.MACRO_OP.LITERAL;
|
|
this.aLiterals.push(name);
|
|
iMatch = 0;
|
|
}
|
|
else {
|
|
/*
|
|
* This must be a REPEAT or CONDITIONAL block.
|
|
*/
|
|
var sOperand = this.getExpression(sOperands);
|
|
if (!sOperand) {
|
|
this.error("missing " + sOperator + " expression: " + sOperands);
|
|
return "";
|
|
}
|
|
sOperands = sOperands.substr(sOperand.length + 1);
|
|
sOperand = sOperand.trim();
|
|
match = sOperands.match(/\s*(<|)(.*)/i);
|
|
name = '_' + sOperator;
|
|
/*
|
|
* The expression is either a repeat count or a condition. Either way, we must be able to
|
|
* resolve it now, so we don't set fPass1 (but that doesn't mean it's the second pass, either).
|
|
*/
|
|
nOperand = this.parseExpression(sOperand) || 0;
|
|
iMatch = 1;
|
|
}
|
|
|
|
/*
|
|
* Now we need to set a global parsing state: we are either about to receive a macro definition on
|
|
* subsequent lines (1), the definition has already started on the current line (2), or the definition
|
|
* started and ended on the current line (0).
|
|
*/
|
|
name = name.toUpperCase();
|
|
this.nMacroDef = 1;
|
|
|
|
var sText = "";
|
|
if (match[iMatch]) { // if there IS also an opening bracket...
|
|
this.nMacroDef = 2; // then the macro definition has begun
|
|
sText = match[iMatch + 1];
|
|
if (sText.slice(-1) == this.chMacroClose) { // and if there is ALSO a closing bracket...
|
|
this.nMacroDef = 0; // the macro definition has ended as well
|
|
sText = sText.slice(0, -1);
|
|
}
|
|
}
|
|
|
|
this.tblMacros[name] = {name, nOperand, aParms, aDefaults, sText, nLine: this.nLine};
|
|
|
|
if (!this.nMacroDef) {
|
|
this.parseMacro(name);
|
|
} else {
|
|
this.sMacroDef = name;
|
|
}
|
|
return name;
|
|
}
|
|
|
|
/**
|
|
* appendMacro(sLine)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sLine
|
|
* @return {string}
|
|
*/
|
|
appendMacro(sLine)
|
|
{
|
|
var sRemain = "";
|
|
for (var i = 0; i < sLine.length; i++) {
|
|
if (sLine[i] == this.chMacroOpen) {
|
|
this.nMacroDef++;
|
|
} else if (sLine[i] == this.chMacroClose) {
|
|
this.nMacroDef--;
|
|
if (this.nMacroDef == 1) {
|
|
this.nMacroDef = 0;
|
|
sRemain = sLine.substr(i + 1);
|
|
sLine = sLine.substr(0, i);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
var name = this.sMacroDef || "";
|
|
this.tblMacros[name].sText += sLine;
|
|
if (!this.nMacroDef) {
|
|
this.sMacroDef = null;
|
|
this.parseMacro(name);
|
|
}
|
|
return sRemain;
|
|
}
|
|
|
|
/**
|
|
* addSymbol(name, value, fLabel, fGlobal, fPrivate)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} name
|
|
* @param {number} value
|
|
* @param {boolean} [fLabel] (default is false, meaning the symbol is an assignment)
|
|
* @param {boolean} [fGlobal] (default is false, meaning the symbol is local to the current file)
|
|
* @param {boolean} [fPrivate] (default is false, meaning the symbol has visibility to the caller)
|
|
*/
|
|
addSymbol(name, value, fLabel = false, fGlobal = false, fPrivate = false)
|
|
{
|
|
name = name.toUpperCase().substr(0, 6);
|
|
if (fLabel && this.tblSymbols[name] !== undefined) {
|
|
this.error("label " + name + " redefined");
|
|
return;
|
|
}
|
|
this.tblSymbols[name] = {name, value, nLine: this.nLine, fLabel, fGlobal, fPrivate};
|
|
this.dbg.setVariable(name, value);
|
|
}
|
|
|
|
/**
|
|
* addWord(sOperator, sOperands)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sOperator
|
|
* @param {string} sOperands
|
|
*/
|
|
addWord(sOperator, sOperands)
|
|
{
|
|
var w;
|
|
var sExp = sOperator + sOperands;
|
|
if (sExp.indexOf(",,") >= 0 || !sOperator && sExp.indexOf('@') < 0 && sExp.indexOf('(') < 0) {
|
|
w = this.parseExpression(sExp, true);
|
|
} else {
|
|
w = this.dbg.parseInstruction(sOperator, sOperands, this.nLocation, true);
|
|
if (w < 0) {
|
|
/*
|
|
* MACRO-10 also allows instructions to be assembled without an opcode (ie, just an address reference).
|
|
*/
|
|
w = this.dbg.parseInstruction("", sExp, this.nLocation, true);
|
|
if (w < 0) w = undefined;
|
|
}
|
|
}
|
|
if (w !== undefined) {
|
|
this.genWord(w, this.dbg.sUndefined);
|
|
} else {
|
|
this.error("unrecognized expression: " + sExp);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* addXWD()
|
|
*
|
|
* The XWD pseudo-op appears to be equivalent to two values separated by two commas, which our fixup code
|
|
* must also support, so we simply treat the XWD operands as a fixup expression.
|
|
*
|
|
* @this {Macro10}
|
|
* @param {string} sOperands
|
|
*/
|
|
addXWD(sOperands)
|
|
{
|
|
this.genWord(0, sOperands.replace(",", ",,"));
|
|
}
|
|
|
|
/**
|
|
* genASCII()
|
|
*
|
|
* Based on the last operator, generate the appropriate ASCII/ASCIZ/SIXBIT data.
|
|
*
|
|
* @this {Macro10}
|
|
*/
|
|
genASCII()
|
|
{
|
|
var n = 0, w = 0; // number of characters in current word, and current word
|
|
var bits, shift; // bits per character, and bits to left-shift next character
|
|
var cch = this.sASCII.length;
|
|
if (this.sOperator == Macro10.PSEUDO_OP.ASCIZ) cch++;
|
|
for (var i = 0; i < cch; i++) {
|
|
if (!n) {
|
|
w = 0; shift = 29; bits = 7;
|
|
if (this.sOperator == Macro10.PSEUDO_OP.SIXBIT) {
|
|
bits--; shift++;
|
|
}
|
|
}
|
|
/*
|
|
* If we're processing an ASCIZ pseudo-op, then yes, we will fetch one character beyond
|
|
* the end of sASCII, which will return NaN, but when we mask a falsey value like NaN, we
|
|
* get zero, so it's all good.
|
|
*/
|
|
var c = this.sASCII.charCodeAt(i) & 0o177;
|
|
/*
|
|
* If we're doing 6-bit encoding, then perform the conversion of lower-case to upper-case,
|
|
* and then adjust/mask.
|
|
*/
|
|
if (bits == 6) {
|
|
if (c >= 0x61 && c <= 0x7A) c -= 0x20;
|
|
c = (c + 0o40) & 0o77;
|
|
}
|
|
w += c * Math.pow(2, shift);
|
|
shift -= bits;
|
|
n++;
|
|
if (shift < 0) {
|
|
this.genWord(w);
|
|
n = 0;
|
|
}
|
|
}
|
|
if (n) this.genWord(w);
|
|
}
|
|
|
|
/**
|
|
* genWord(value, sFixup)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {number} value (default value for the current location)
|
|
* @param {string|null} [sFixup] (optional fixup value to evaluate later)
|
|
*/
|
|
genWord(value, sFixup)
|
|
{
|
|
this.aWords[this.nLocation] = this.truncate(value);
|
|
if (sFixup != null) this.aFixups.push({nLocation: this.nLocation, sValue: sFixup});
|
|
this.nLocation++;
|
|
}
|
|
|
|
/**
|
|
* truncate(value, nLocation)
|
|
*
|
|
* @this {Macro10}
|
|
* @param {number} value
|
|
* @param {number} [nLocation]
|
|
* @return {number}
|
|
*/
|
|
truncate(value, nLocation = this.nLocation)
|
|
{
|
|
var w = this.dbg.truncate(value || 0, 36, true);
|
|
if (value < -PDP10.INT_LIMIT || value >= PDP10.WORD_LIMIT) {
|
|
this.warning("truncated value " + Str.toOct(value) + " at location " + Str.toOct(nLocation) + " to " + Str.toOct(w));
|
|
}
|
|
return w;
|
|
}
|
|
}
|
|
|
|
Macro10.PSEUDO_OP = {
|
|
ASCII: "ASCII",
|
|
ASCIZ: "ASCIZ",
|
|
DEFINE: "DEFINE",
|
|
IFE: "IFE",
|
|
LITERAL:"LITERAL",
|
|
PAGE: "PAGE",
|
|
REPEAT: "REPEAT",
|
|
SIXBIT: "SIXBIT",
|
|
SUBTTL: "SUBTTL",
|
|
XWD: "XWD"
|
|
};
|
|
|
|
/*
|
|
* This enumerates the kinds of macros stored in tblMacros. The nOperand field should contain
|
|
* one of these values, unless it's a REPEAT or CONDITIONAL block, in which case it will contain
|
|
* either a repeat count or conditional value.
|
|
*/
|
|
Macro10.MACRO_OP = {
|
|
DEFINE: -1,
|
|
LITERAL: -2,
|
|
RESERVED: -3,
|
|
};
|