diff --git a/modules/pdp10/lib/cpuops.js b/modules/pdp10/lib/cpuops.js index 46dacd569..fe08f6ae0 100644 --- a/modules/pdp10/lib/cpuops.js +++ b/modules/pdp10/lib/cpuops.js @@ -372,7 +372,7 @@ PDP10.opLDB = function(op, ac) var w = this.readWord(this.regEA); if (this.regBP < 0) { this.regBP = w; - this.regRA = this.regEA | PDP10.OPCODE.I_BIT; + this.regRA = this.regEA | PDP10.OPCODE.I_FIELD; return; } var p = (this.regBP / PDP10.OPCODE.P_SCALE) & PDP10.OPCODE.P_MASK; @@ -458,7 +458,7 @@ PDP10.opDPB = function(op, ac) var w = this.readWord(this.regEA); if (this.regBP < 0) { this.regBP = w; - this.regRA = this.regEA | PDP10.OPCODE.I_BIT; + this.regRA = this.regEA | PDP10.OPCODE.I_FIELD; return; } var p = (this.regBP / PDP10.OPCODE.P_SCALE) & PDP10.OPCODE.P_MASK; diff --git a/modules/pdp10/lib/cpustate.js b/modules/pdp10/lib/cpustate.js index 76cd8e6cb..46a814070 100644 --- a/modules/pdp10/lib/cpustate.js +++ b/modules/pdp10/lib/cpustate.js @@ -437,7 +437,7 @@ class CPUStatePDP10 extends CPUPDP10 { */ getOpcode() { - if ((this.regRA & PDP10.OPCODE.I_BIT)) { + if ((this.regRA & PDP10.OPCODE.I_FIELD)) { this.regRA = this.regLA = this.readWord(this.regEA); } else if (this.regXC >= 0) { this.regRA = this.regOP = this.readWord(this.regXC); @@ -468,7 +468,7 @@ class CPUStatePDP10 extends CPUPDP10 { var x = (this.regRA >> PDP10.OPCODE.X_SHIFT) & PDP10.OPCODE.X_MASK; if (x) this.regEA = (this.regEA + (this.regLA = this.readWord(x))) & PDP10.ADDR_MASK; - return (this.regRA & PDP10.OPCODE.I_BIT)? -1 : ((this.regOP / PDP10.OPCODE.A_SCALE)|0); + return (this.regRA & PDP10.OPCODE.I_FIELD)? -1 : ((this.regOP / PDP10.OPCODE.A_SCALE)|0); } /** diff --git a/modules/pdp10/lib/debugger.js b/modules/pdp10/lib/debugger.js index e2649a12a..141a96758 100644 --- a/modules/pdp10/lib/debugger.js +++ b/modules/pdp10/lib/debugger.js @@ -1570,7 +1570,7 @@ class DebuggerPDP10 extends Debugger { } } sOperation = Str.pad(sOperation, 8) + (sOperand? sOperand + ',' : ""); - if (opCode & PDP10.OPCODE.I_BIT) sOperation += '@'; + if (opCode & PDP10.OPCODE.I_FIELD) sOperation += '@'; sOperation += this.toStrBase(opCode & PDP10.OPCODE.Y_MASK, -1); var i = (opCode >> PDP10.OPCODE.X_SHIFT) & PDP10.OPCODE.X_MASK; if (i) sOperation += '(' + this.toStrBase(i, -1) + ')'; @@ -1747,7 +1747,7 @@ class DebuggerPDP10 extends Debugger { * because if we parse them AFTER parsing the address expression, we might lose an undefined symbol * indication, and if the caller needs to handle address fixups, that would be bad. */ - if (match[1]) opCode += PDP10.OPCODE.I_BIT; + if (match[1]) opCode += PDP10.OPCODE.I_FIELD; sOperand = match[3]; if (sOperand) { diff --git a/modules/pdp10/lib/defines.js b/modules/pdp10/lib/defines.js index bf22ce700..976b3af1c 100644 --- a/modules/pdp10/lib/defines.js +++ b/modules/pdp10/lib/defines.js @@ -171,10 +171,14 @@ var PDP10 = { S_MASK: 0o77, // S mask (after shift) A_SHIFT: 23, // A shift A_MASK: 0o17, // A mask (after shift) - I_BIT: 0o20000000, // indirect bit + A_FIELD: 0o740000000, // A field mask + I_FIELD: 0o20000000, // indirect bit mask X_SHIFT: 18, // X shift X_MASK: 0o17, // X mask (after shift) - Y_MASK: 0o777777, // Y mask + X_FIELD: 0o17000000, // X field mask + Y_SHIFT: 0, // Y shift + Y_MASK: 0o777777, // Y mask (after shift) + Y_FIELD: 0o777777, // Y field mask R_MASK: 0o37777777, // used to isolate the low 23 bits (I,X,Y) PTR_MASK: 0o77777777, // used to isolate the low 24 bits (?,I,X,Y) of a byte pointer HALT: 0o5304 // operation code for HALT diff --git a/modules/pdp10/lib/macro10.js b/modules/pdp10/lib/macro10.js index 56ad69785..daadeff5e 100644 --- a/modules/pdp10/lib/macro10.js +++ b/modules/pdp10/lib/macro10.js @@ -82,7 +82,7 @@ var Lit; * Elements of stackScopes. * * @typedef {{ - * name:(string), + * name:(string|undefined), * aWords:(Array.), * aFixups:(Array.), * nLocation:(number), @@ -145,7 +145,7 @@ class Macro10 { */ this.nAddrStart = null; - this.println("starting PCjs MACRO-10 Mini-Assembler..."); + if (MAXDEBUG) this.println("starting PCjs MACRO-10 Mini-Assembler..."); /* * Initialize all the tables that MACRO-10 uses. @@ -288,7 +288,7 @@ class Macro10 { /* * We know that local resources ending with ".MAC" are actually stored with a ".txt" extension. */ - if (sURL.slice(-4).toUpperCase() == ".MAC") sURL += ".txt"; + if (sURL.indexOf(':') < 0 && sURL.slice(-4).toUpperCase() == ".MAC") sURL += ".txt"; Web.getResource(sURL, null, true, function processMacro10(sFile, sResource, nErrorCode) { if (nErrorCode) { @@ -360,7 +360,7 @@ class Macro10 { * Since, at this early stage, I'm not sure whether all the resources I'm interested in * assembling have had their original CR/LF line endings preserved (eg, some files may have * been converted to LF-only line endings), I'm going to skip over whatever line endings - * are in the array and insert my own uniform CR/LF sequences. + * are in the array (stored in every OTHER entry) and insert my own uniform CR/LF sequences. */ if (!this.parseLine(this.asLines[i] + '\r\n')) break; /* @@ -378,6 +378,9 @@ class Macro10 { this.error("open scope from line " + this.stackScopes[0].nLine); } + /* + * Process all literals next. + */ let nLocationLiterals = this.nLocation; for (let i = 0; i < this.aLiterals.length; i++) { @@ -410,8 +413,8 @@ class Macro10 { */ let lit = this.aLiterals[i]; /* - * First things first: verify that the literal is one contiguous set of words (I'm not sure how - * it couldn't be, but better safe than sorry). + * First things first: verify that the literal is one contiguous zero-based set of words (I'm not sure + * how it couldn't be, but better safe than sorry). */ let aWords = []; let nWords = 0; @@ -427,6 +430,13 @@ class Macro10 { for (let nLocation = nLocationLiterals; nLocation + nWords <= this.nLocation; nLocation++) { let n; for (n = 0; n < nWords; n++) { + /* + * This check requires that the initial values of the words in the literals match AND that + * their fixup expressions, if any, match as well. Here again, MACRO-10 may be more aggressive + * in either verifying fixup equality or evaluating any fixups that it can immediately, but + * but I prefer to leave all fixup evaluation where it is (below), after all literals and then + * all variables have been added to the output. + */ if (aWords[n] !== this.aWords[nLocation + n] || lit.aFixups[n] != this.aFixups[nLocation]) break; } if (n == nWords) { @@ -444,6 +454,9 @@ class Macro10 { } } + /* + * Now add all variable definitions. + */ for (let i = 0; i < this.aVariables.length; i++) { let name = this.aVariables[i]; let macro = this.tblMacros[name]; @@ -457,6 +470,9 @@ class Macro10 { this.parseText(macro.sText); } + /* + * And last but not least, perform all fixups. + */ this.aFixups.forEach(function processFixup(sValue, nLocation){ let value = macro10.parseExpression(sValue, undefined, nLocation); if (value === undefined) { @@ -624,6 +640,7 @@ class Macro10 { case Macro10.PSEUDO_OP.IFN: case Macro10.PSEUDO_OP.IRP: case Macro10.PSEUDO_OP.IRPC: + case Macro10.PSEUDO_OP.OPDEF: case Macro10.PSEUDO_OP.REPEAT: this.addMacro(sOperator, sRemainder); break; @@ -662,6 +679,22 @@ class Macro10 { /** * parseMacro(name, sOperands) * + * For OPDEF macros, the operands are opcode values rather than conventional macro parameter values. + * As the MACRO-10 manual explains: + * + * Defines the symbol as an operator equivalent to expression, giving the symbol a fullword value. + * When the operator is later used with operands, the accumulator fields are added, the indirect bits + * are ORed, the memory addresses are added, and the index register addresses are added. + * + * EXAMPLE: OPDEF CAL [MOVE 1,@SYM(2)] + * CAL 1,BOL(2) + * + * RESULT: MOVE 2,@SYM+BOL(4) + * + * The easiest thing to do is parse the OPDEF text, allowing it to generate its default "fullword value", + * then parse the operands in their own scope, extract the bits generated from the operands, and merge them + * into the generated OPDEF value. + * * @this {Macro10} * @param {string} name * @param {string} [sOperands] @@ -674,6 +707,35 @@ class Macro10 { if (!macro) return false; if (sOperands != null) { + /* + * If this is an OPDEF, then a two-step process is required: generate the OPDEF's value, then parse + * the operands and merge their bits with the OPDEF's bits. + */ + if (macro.nOperand == Macro10.MACRO_OP.OPDEF) { + var nLocation = this.nLocation; + this.parseText(macro.sText); + if (nLocation < this.nLocation) { + this.pushScope(); + this.parseText(sOperands); + var w = this.aWords[0]; + var sFixup = this.aFixups[0]; + this.popScope(); + if (w !== undefined) { + this.aWords[nLocation] += (w & (PDP10.OPCODE.A_FIELD | PDP10.OPCODE.X_FIELD | PDP10.OPCODE.Y_FIELD)); + this.aWords[nLocation] |= (w & PDP10.OPCODE.I_FIELD); + if (sFixup) { + if (!this.aFixups[nLocation]) { + this.aFixups[nLocation] = sFixup; + } else { + this.aFixups[nLocation] += '+' + sFixup; + } + } + return true; + } + } + this.error("OPDEF '" + name + "' error: " + sOperands); + return false; + } var macroPrev = this.macroCall; this.macroCall = macro; macro.aValues = this.getValues(sOperands, true); @@ -683,7 +745,7 @@ class Macro10 { * (such as the SHIFT macro in /apps/pdp10/tests/macro10/TEXT.MAC) could blow the stack. Nothing bad * should happen (other than a JavaScript stack limit exception aborting the assembly), but it begs * the question: did MACRO-10 perform any tail recursion optimizations or other tricks to prevent macros - * from running amok, or could they blow MACRO-10's stack just as easily? + * from gobbling stack, or could they blow MACRO-10's stack just as easily? */ this.macroCall = macroPrev; return true; @@ -737,6 +799,14 @@ class Macro10 { */ parseText(sText, aParms, aValues, aDefaults) { + /* + * Unlike the caller of parseResources(), we don't split the text using a capture group, + * so all line separators are tossed, and just like parseResources(), we always include a + * uniform CR/LF sequence at the end of each line. + * + * TODO: Consider whether callers should always store their text snippets as line arrays, too, + * to avoid this re-splitting. + */ var asLines = sText.split(/\r?\n/); for (var iLine = 0; iLine < asLines.length; iLine++) { var sLine = asLines[iLine] + '\r\n'; @@ -748,7 +818,7 @@ class Macro10 { * pushScope(name) * * @this {Macro10} - * @param {string} name + * @param {string} [name] (must be defined for literals only) */ pushScope(name) { @@ -778,7 +848,7 @@ class Macro10 { return; } var name = this.stackScopes[this.stackScopes.length - 1].name; - this.aLiterals.push({name, aWords: this.aWords, aFixups: this.aFixups}); + if (name) this.aLiterals.push({name, aWords: this.aWords, aFixups: this.aFixups}); var scope = this.stackScopes.pop(); this.aWords = scope.aWords; this.aFixups = scope.aFixups; @@ -1089,8 +1159,8 @@ class Macro10 { /** * 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. + * If sOperator is DEFINE (or OPDEF), 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 @@ -1116,7 +1186,9 @@ class Macro10 { if (sOperator == Macro10.PSEUDO_OP.DEFINE) { /* - * This is a DEFINE (macro) block. + * This is a DEFINE (macro) block. At present, this requires that all + * (parenthesized) parameters exist on the same line, but the (angle-bracketed) + * definition can continue on for multiple lines. */ match = sOperands.match(/([A-Z$%.][0-9A-Z$%.]*)\s*(\([^)]*\)|)\s*(<|)([\s\S]*)/i); if (!match) { @@ -1134,6 +1206,24 @@ class Macro10 { nOperand = Macro10.MACRO_OP.DEFINE; iMatch = 3; } + else if (sOperator == Macro10.PSEUDO_OP.OPDEF) { + /* + * This is a OPDEF block. Unlike DEFINE blocks, I'm assuming that the + * (square-bracketed) definition begins on the same line, but I'm not requiring + * it to end on the same line (I'm not sure that MACRO-10 allowed multi-line + * OPDEFs, but it doesn't matter to us). + */ + this.chMacroOpen = '['; + this.chMacroClose = ']'; + match = sOperands.match(/([A-Z$%.][0-9A-Z$%.]*)\s*(\[)([\s\S]*)/i); + if (!match) { + this.error("unrecognized " + sOperator + ": " + sOperands); + return sOperands; + } + name = match[1]; + nOperand = Macro10.MACRO_OP.OPDEF; + iMatch = 2; + } else if (sOperator == Macro10.PSEUDO_OP.LITERAL) { /* * This is a LITERAL block. @@ -1478,6 +1568,7 @@ Macro10.PSEUDO_OP = { IRPC: "IRPC", LALL: "LALL", LITERAL: "LITERAL", // this is a pseudo-pseudo-op, used for internal purposes + OPDEF: "OPDEF", PAGE: "PAGE", REPEAT: "REPEAT", SIXBIT: "SIXBIT", @@ -1493,6 +1584,7 @@ Macro10.PSEUDO_OP = { */ Macro10.MACRO_OP = { DEFINE: -1, - LITERAL: -2, - RESERVED: -3, + OPDEF: -2, + LITERAL: -3, + RESERVED: 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