circom/src/exec.js
src/exec.jsRaw
1/*
2 Copyright 2018 0KIMS association.
3
4 This file is part of circom (Zero Knowledge Circuit Compiler).
5
6 circom is a free software: you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
10
11 circom is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with circom. If not, see <https://www.gnu.org/licenses/>.
18*/
19
20const path = require("path");
21const fs = require("fs");
22
23const bigInt = require("big-integer");
24const __P__ = new bigInt("21888242871839275222246405745257275088548364400416034343698204186575808495617");
25const __MASK__ = new bigInt(2).pow(253).minus(1);
26
27const lc = require("./lcalgebra");
28const parser = require("../parser/jaz.js").parser;
29
30/* TODO: Add lines information
31
32function setLines(dst, first, last) {
33 last = last || first;
34 dst.first_line = first.first_line;
35 dst.first_column = first.first_column;
36 dst.last_line = last.last_line;
37 dst.last_column = last.last_column;
38}
39*/
40
41module.exports = exec;
42
43
44function exec(ctx, ast) {
45 if (!ast) {
46 return error(ctx, ast, "Null AST");
47 }
48 if ((ast.type == "NUMBER") || (ast.type == "LINEARCOMBINATION") || (ast.type =="SIGNAL") || (ast.type == "QEQ")) {
49 return ast;
50 } else if (ast.type == "VARIABLE") {
51 return execVariable(ctx, ast);
52 } else if (ast.type == "PIN") {
53 return execPin(ctx, ast);
54 } else if (ast.type == "OP") {
55 if (ast.op == "=") {
56 return execVarAssignement(ctx, ast);
57 } else if (ast.op == "<--") {
58 return execSignalAssign(ctx, ast);
59 } else if (ast.op == "<==") {
60 return execSignalAssignConstrain(ctx, ast);
61 } else if (ast.op == "===") {
62 return execConstrain(ctx, ast);
63 } else if (ast.op == "+=") {
64 return execVarAddAssignement(ctx, ast);
65 } else if (ast.op == "*=") {
66 return execVarMulAssignement(ctx, ast);
67 } else if (ast.op == "+") {
68 return execAdd(ctx, ast);
69 } else if (ast.op == "-") {
70 return execSub(ctx, ast);
71 } else if (ast.op == "UMINUS") {
72 return execUMinus(ctx, ast);
73 } else if (ast.op == "*") {
74 return execMul(ctx, ast);
75 } else if (ast.op == "%") {
76 return execMod(ctx, ast);
77 } else if (ast.op == "PLUSPLUSRIGHT") {
78 return execPlusPlusRight(ctx, ast);
79 } else if (ast.op == "PLUSPLUSLEFT") {
80 return execPlusPlusLeft(ctx, ast);
81 } else if (ast.op == "MINUSMINUSRIGHT") {
82 return execMinusMinusRight(ctx, ast);
83 } else if (ast.op == "MINUSMINUSLEFT") {
84 return execMinusMinusLeft(ctx, ast);
85 } else if (ast.op == "/") {
86 return execDiv(ctx, ast);
87 } else if (ast.op == "\\") {
88 return execIDiv(ctx, ast);
89 } else if (ast.op == "**") {
90 return execExp(ctx, ast);
91 } else if (ast.op == "&") {
92 return execBAnd(ctx, ast);
93 } else if (ast.op == "&&") {
94 return execAnd(ctx, ast);
95 } else if (ast.op == "||") {
96 return execOr(ctx, ast);
97 } else if (ast.op == "<<") {
98 return execShl(ctx, ast);
99 } else if (ast.op == ">>") {
100 return execShr(ctx, ast);
101 } else if (ast.op == "<") {
102 return execLt(ctx, ast);
103 } else if (ast.op == ">") {
104 return execGt(ctx, ast);
105 } else if (ast.op == "<=") {
106 return execLte(ctx, ast);
107 } else if (ast.op == ">=") {
108 return execGte(ctx, ast);
109 } else if (ast.op == "==") {
110 return execEq(ctx, ast);
111 } else if (ast.op == "!=") {
112 return execNeq(ctx, ast);
113 } else if (ast.op == "?") {
114 return execTerCon(ctx, ast);
115 } else {
116 error(ctx, ast, "Invalid operation: " + ast.op);
117 }
118 } else if (ast.type == "DECLARE") {
119 if (ast.declareType == "COMPONENT") {
120 return execDeclareComponent(ctx, ast);
121 } else if ((ast.declareType == "SIGNALIN")||
122 (ast.declareType == "SIGNALOUT")||
123 (ast.declareType == "SIGNAL")) {
124 return execDeclareSignal(ctx, ast);
125 } else if (ast.declareType == "VARIABLE") {
126 return execDeclareVariable(ctx, ast);
127 } else {
128 error(ctx, ast, "Invalid declaration: " + ast.declareType);
129 }
130 } else if (ast.type == "FUNCTIONCALL") {
131 return execFunctionCall(ctx, ast);
132 } else if (ast.type == "BLOCK") {
133 return execBlock(ctx, ast);
134 } else if (ast.type == "FOR") {
135 return execFor(ctx, ast);
136 } else if (ast.type == "WHILE") {
137 return execWhile(ctx, ast);
138 } else if (ast.type == "IF") {
139 return execIf(ctx, ast);
140 } else if (ast.type == "RETURN") {
141 return execReturn(ctx, ast);
142 } else if (ast.type == "TEMPLATEDEF") {
143 return execTemplateDef(ctx, ast);
144 } else if (ast.type == "FUNCTIONDEF") {
145 return execFunctionDef(ctx, ast);
146 } else if (ast.type == "INCLUDE") {
147 return execInclude(ctx, ast);
148 } else if (ast.type == "ARRAY") {
149 return execArray(ctx, ast);
150 } else {
151 error(ctx, ast, "Invalid AST node type: " + ast.type);
152 }
153}
154
155function error(ctx, ast, errStr) {
156 ctx.error = {
157 pos: {
158 first_line: ast.first_line,
159 first_column: ast.first_column,
160 last_line: ast.last_line,
161 last_column: ast.last_column
162 },
163 errStr: errStr,
164 errFile: ctx.fileName,
165 ast: ast,
166 message: errStr
167 };
168}
169
170function iterateSelectors(ctx, sizes, baseName, fn) {
171 if (sizes.length == 0) {
172 return fn(baseName);
173 }
174 const res = [];
175 for (let i=0; i<sizes[0]; i++) {
176 res.push(iterateSelectors(ctx, sizes.slice(1), baseName+"["+i+"]", fn));
177 if (ctx.error) return null;
178 }
179 return res;
180}
181
182function setScope(ctx, name, selectors, value) {
183 let l = getScopeLevel(ctx, name);
184 if (l==-1) l= ctx.scopes.length-1;
185
186 if (selectors.length == 0) {
187 ctx.scopes[l][name] = value;
188 } else {
189 setScopeArray(ctx.scopes[l][name], selectors);
190 }
191
192 function setScopeArray(a, sels) {
193 if (sels.length == 1) {
194 a[sels[0].value] = value;
195 } else {
196 setScopeArray(a[sels[0]], sels.slice(1));
197 }
198 }
199}
200
201function getScope(ctx, name, selectors) {
202
203 const sels = [];
204 if (selectors) {
205 for (let i=0; i< selectors.length; i++) {
206 const idx = exec(ctx, selectors[i]);
207 if (ctx.error) return;
208
209 if (idx.type != "NUMBER") return error(ctx, selectors[i], "expected a number");
210 sels.push( idx.value.toJSNumber() );
211 }
212 }
213
214
215 function select(v, s) {
216 s = s || [];
217 if (s.length == 0) return v;
218 return select(v[s[0]], s.slice(1));
219 }
220
221 for (let i=ctx.scopes.length-1; i>=0; i--) {
222 if (ctx.scopes[i][name]) return select(ctx.scopes[i][name], sels);
223 }
224 return null;
225}
226
227function getScopeLevel(ctx, name) {
228 for (let i=ctx.scopes.length-1; i>=0; i--) {
229 if (ctx.scopes[i][name]) return i;
230 }
231 return -1;
232}
233
234function execBlock(ctx, ast) {
235 for (let i=0; i<ast.statements.length; i++) {
236 exec(ctx, ast.statements[i]);
237 if (ctx.returnValue) return;
238 if (ctx.error) return;
239 }
240}
241
242function execTemplateDef(ctx, ast) {
243 const scope = ctx.scopes[0]; // Lets put templates always in top scope.
244 // const scope = ctx.scopes[ctx.scopes.length-1];
245 if (getScope(ctx, ast.name)) {
246 return error(ctx, ast, "Name already exists: "+ast.name);
247 }
248 scope[ast.name] = {
249 type: "TEMPLATE",
250 params: ast.params,
251 block: ast.block,
252 fileName: ctx.fileName,
253 filePath: ctx.filePath,
254 scopes: copyScope(ctx.scopes)
255 };
256}
257
258function execFunctionDef(ctx, ast) {
259 const scope = ctx.scopes[0]; // Lets put functions always in top scope.
260 // const scope = ctx.scopes[ctx.scopes.length-1];
261 if (getScope(ctx, ast.name)) {
262 return error(ctx, ast, "Name already exists: "+ast.name);
263 }
264 ctx.functionParams[ast.name] = ast.params;
265 scope[ast.name] = {
266 type: "FUNCTION",
267 params: ast.params,
268 block: ast.block,
269 fileName: ctx.fileName,
270 filePath: ctx.filePath,
271 scopes: copyScope(ctx.scopes)
272 };
273}
274
275
276function execDeclareComponent(ctx, ast) {
277 const scope = ctx.scopes[ctx.scopes.length-1];
278
279 if (ast.name.type != "VARIABLE") return error(ctx, ast, "Invalid component name");
280 if (getScope(ctx, ast.name.name)) return error(ctx, ast, "Name already exists: "+ast.name.name);
281
282 const baseName = ctx.currentComponent ? ctx.currentComponent + "." + ast.name.name : ast.name.name;
283
284 const sizes=[];
285 for (let i=0; i< ast.name.selectors.length; i++) {
286 const size = exec(ctx, ast.name.selectors[i]);
287 if (ctx.error) return;
288
289 if (size.type != "NUMBER") return error(ctx, ast.name.selectors[i], "expected a number");
290
291 sizes.push( size.value.toJSNumber() );
292 }
293
294
295 scope[ast.name.name] = iterateSelectors(ctx, sizes, baseName, function(fullName) {
296
297 ctx.components[fullName] = "UNINSTANTIATED";
298
299 return {
300 type: "COMPONENT",
301 fullName: fullName
302 };
303 });
304
305 return {
306 type: "VARIABLE",
307 name: ast.name.name,
308 selectors: []
309 };
310}
311
312function execInstantiateComponet(ctx, vr, fn) {
313
314 if (vr.type != "VARIABLE") return error(ctx, fn, "Left hand instatiate component must be a variable");
315 if (fn.type != "FUNCTIONCALL") return error(ctx, fn, "Right type of instantiate component must be a function call");
316
317 const componentName = vr.name;
318 const templateName = fn.name;
319
320 const scopeLevel = getScopeLevel(ctx, templateName);
321 if (scopeLevel == -1) return error(ctx,fn, "Invalid Template");
322 const template = getScope(ctx, templateName);
323
324 if (template.type != "TEMPLATE") return error(ctx, fn, "Invalid Template");
325
326
327 const paramValues = [];
328 for (let i=0; i< fn.params.length; i++) {
329 const v = exec(ctx, fn.params[i]);
330 if (ctx.error) return;
331
332 paramValues.push(v);
333 }
334 if (template.params.length != paramValues.length) error(ctx, fn, "Invalid Number of parameters");
335
336 const vv = getScope(ctx, componentName, vr.selectors);
337
338 if (!vv) return error(ctx, vr, "Component not defined"+ componentName);
339
340 instantiateComponent(vv);
341
342 function instantiateComponent(varVal) {
343
344 function extractValue(v) {
345 if (Array.isArray(v)) {
346 return v.map(extractValue);
347 } else {
348 return v.value.toString();
349 }
350 }
351
352 if (Array.isArray(varVal)) {
353 for (let i =0; i<varVal.length; i++) {
354 instantiateComponent(varVal[i]);
355 }
356 return;
357 }
358
359 if (ctx.components[varVal.fullName] != "UNINSTANTIATED") error(ctx, fn, "Component already instantiated");
360
361 const oldComponent = ctx.currentComponent;
362 const oldFileName = ctx.fileName;
363 const oldFilePath = ctx.filePath;
364 ctx.currentComponent = varVal.fullName;
365
366 ctx.components[ctx.currentComponent] = {
367 signals: [],
368 params: {}
369 };
370
371 const oldScopes = ctx.scopes;
372
373 ctx.scopes = oldScopes.slice(0, scopeLevel+1);
374
375 if (template.params.length != paramValues.length) return error(ctx, fn, "Invalid number of parameters: " + templateName);
376
377 const scope = {};
378 for (let i=0; i< template.params.length; i++) {
379 scope[template.params[i]] = paramValues[i];
380 ctx.components[ctx.currentComponent].params[template.params[i]] = extractValue(paramValues[i]);
381 }
382
383 ctx.components[ctx.currentComponent].template = templateName;
384 ctx.fileName = template.fileName;
385 ctx.filePath = template.filePath;
386 ctx.scopes = copyScope( template.scopes );
387 ctx.scopes.push(scope);
388
389 execBlock(ctx, template.block);
390
391 ctx.fileName = oldFileName;
392 ctx.filePath = oldFilePath;
393 ctx.currentComponent = oldComponent;
394 ctx.scopes = oldScopes;
395 }
396}
397
398function execFunctionCall(ctx, ast) {
399
400 const scopeLevel = getScopeLevel(ctx, ast.name);
401 if (scopeLevel == -1) return error(ctx, ast, "Function not defined: " + ast.name);
402 const fnc = getScope(ctx, ast.name);
403
404 if (fnc.type != "FUNCTION") return error(ctx, ast, "Not a function: " + ast.name);
405
406 const paramValues = [];
407 for (let i=0; i< ast.params.length; i++) {
408 const v = exec(ctx, ast.params[i]);
409 if (ctx.error) return;
410
411 paramValues.push(v);
412 }
413
414 if (ast.params.length != paramValues.length) error(ctx, ast, "Invalid Number of parameters");
415
416 const oldFileName = ctx.fileName;
417 const oldFilePath = ctx.filePath;
418
419 const oldScopes = ctx.scopes;
420
421 ctx.scopes = oldScopes.slice(0, scopeLevel+1);
422
423 const scope = {};
424 for (let i=0; i< fnc.params.length; i++) {
425 scope[fnc.params[i]] = paramValues[i];
426 }
427
428 ctx.fileName = fnc.fileName;
429 ctx.filePath = fnc.filePath;
430 ctx.scopes = copyScope( fnc.scopes );
431 ctx.scopes.push(scope);
432
433 execBlock(ctx, fnc.block);
434
435 const res = ctx.returnValue;
436 ctx.returnValue = null;
437
438 ctx.fileName = oldFileName;
439 ctx.filePath = oldFilePath;
440 ctx.scopes = oldScopes;
441
442 return res;
443}
444
445function execReturn(ctx, ast) {
446 ctx.returnValue = exec(ctx, ast.value);
447 return;
448}
449
450function execDeclareSignal(ctx, ast) {
451 const scope = ctx.scopes[ctx.scopes.length-1];
452
453 if (ast.name.type != "VARIABLE") return error(ctx, ast, "Invalid component name");
454 if (getScope(ctx, ast.name.name)) return error(ctx, ast, "Name already exists: "+ast.name.name);
455
456 const baseName = ctx.currentComponent ? ctx.currentComponent + "." + ast.name.name : ast.name.name;
457
458 const sizes=[];
459 for (let i=0; i< ast.name.selectors.length; i++) {
460 const size = exec(ctx, ast.name.selectors[i]);
461 if (ctx.error) return;
462
463 if (size.type != "NUMBER") return error(ctx, ast.name.selectors[i], "expected a number");
464 sizes.push( size.value.toJSNumber() );
465 }
466
467 scope[ast.name.name] = iterateSelectors(ctx, sizes, baseName, function(fullName) {
468 ctx.signals[fullName] = {
469 fullName: fullName,
470 direction: ast.declareType == "SIGNALIN" ? "IN" : (ast.declareType == "SIGNALOUT" ? "OUT" : ""),
471 private: ast.private,
472 component: ctx.currentComponent,
473 equivalence: "",
474 alias: [fullName]
475 };
476 ctx.components[ctx.currentComponent].signals.push(fullName);
477 return {
478 type: "SIGNAL",
479 fullName: fullName,
480 };
481 });
482 return {
483 type: "VARIABLE",
484 name: ast.name.name,
485 selectors: []
486 };
487}
488
489function execDeclareVariable(ctx, ast) {
490 const scope = ctx.scopes[ctx.scopes.length-1];
491
492 if (ast.name.type != "VARIABLE") return error(ctx, ast, "Invalid linear combination name");
493 if (getScope(ctx, ast.name.name)) return error(ctx, ast, "Name already exists: "+ast.name.name);
494
495 const sizes=[];
496 for (let i=0; i< ast.name.selectors.length; i++) {
497 const size = exec(ctx, ast.name.selectors[i]);
498 if (ctx.error) return;
499
500 if (size.type != "NUMBER") return error(ctx, ast.name.selectors[i], "expected a number");
501 sizes.push( size.value.toJSNumber() );
502 }
503
504 scope[ast.name.name] = iterateSelectors(ctx, sizes, "", function() {
505 return {
506 type: "NUMBER",
507 value: bigInt(0)
508 };
509 });
510
511 return {
512 type: "VARIABLE",
513 name: ast.name.name,
514 selectors: []
515 };
516}
517
518function execVariable(ctx, ast) {
519 let v;
520 try {
521 v = getScope(ctx, ast.name, ast.selectors);
522 } catch(err) {
523 console.log(JSON.stringify(ast, null,1));
524 }
525 if (ctx.error) return;
526
527 if (!v) return error(ctx, ast, "Variable not defined");
528
529 // If the signal has an assigned value (constant) just return the constant
530 if ((v.type == "SIGNAL") && (ctx.signals[v.fullName].value)) {
531 return {
532 type: "NUMBER",
533 value: ctx.signals[v.fullName].value
534 };
535 }
536 let res;
537 res=v;
538 return res;
539}
540
541function execPin(ctx, ast) {
542 const component = getScope(ctx, ast.component.name, ast.component.selectors);
543 if (!component) return error(ctx, ast.component, "Component does not exists: "+ast.component.name);
544 if (ctx.error) return;
545 let signalFullName = component.fullName + "." + ast.pin.name;
546 for (let i=0; i< ast.pin.selectors.length; i++) {
547 const sel = exec(ctx, ast.pin.selectors[i]);
548 if (ctx.error) return;
549
550 if (sel.type != "NUMBER") return error(ctx, ast.pin.selectors[i], "expected a number");
551
552 signalFullName += "[" + sel.value.toJSNumber() + "]";
553 }
554 if (!ctx.signals[signalFullName]) error(ctx, ast, "Signal not defined:" + signalFullName);
555 return {
556 type: "SIGNAL",
557 fullName: signalFullName
558 };
559}
560
561function execFor(ctx, ast) {
562
563 ctx.scopes.push({});
564 exec(ctx, ast.init);
565 if (ctx.error) return;
566
567 let v = exec(ctx, ast.condition);
568 if (ctx.error) return;
569
570 if (typeof v.value != "undefined") {
571 while ((v.value.neq(0))&&(!ctx.returnValue)) {
572 exec(ctx, ast.body);
573 if (ctx.error) return;
574
575 exec(ctx, ast.step);
576 if (ctx.error) return;
577
578 v = exec(ctx, ast.condition);
579 if (ctx.error) return;
580 }
581 }
582 ctx.scopes.pop();
583}
584
585function execWhile(ctx, ast) {
586 let v = exec(ctx, ast.condition);
587 if (ctx.error) return;
588
589 if (typeof v.value != "undefined") {
590 while ((v.value.neq(0))&&(!ctx.returnValue)) {
591 exec(ctx, ast.body);
592 if (ctx.error) return;
593
594 v = exec(ctx, ast.condition);
595 if (ctx.error) return;
596 }
597 }
598}
599
600function execIf(ctx, ast) {
601 let v = exec(ctx, ast.condition);
602 if (ctx.error) return;
603
604 if (typeof v.value != "undefined") {
605 if ((v.value.neq(0))&&(!ctx.returnValue)) {
606 exec(ctx, ast.then);
607 if (ctx.error) return;
608 } else {
609 if (ast.else) {
610 exec(ctx, ast.else);
611 if (ctx.error) return;
612 }
613 }
614 }
615}
616
617
618function execVarAssignement(ctx, ast) {
619 let v;
620 if (ast.values[0].type == "DECLARE") {
621 v = exec(ctx, ast.values[0]);
622 if (ctx.error) return;
623 } else {
624 v = ast.values[0];
625 }
626 const num = getScope(ctx, v.name, v.selectors);
627 if (ctx.error) return;
628
629 if ((typeof(num) != "object")||(num == null)) return error(ctx, ast, "Variable not defined");
630
631 if (num.type == "COMPONENT") return execInstantiateComponet(ctx, v, ast.values[1]);
632 if (ctx.error) return;
633// if (num.type == "SIGNAL") return error(ctx, ast, "Cannot assign to a signal with `=` use <-- or <== ops");
634
635 const res = exec(ctx, ast.values[1]);
636 if (ctx.error) return;
637
638 setScope(ctx, v.name, v.selectors, res);
639
640 return v;
641}
642
643function execLt(ctx, ast) {
644 const a = exec(ctx, ast.values[0]);
645 if (ctx.error) return;
646 if (a.type != "NUMBER") return { type: "NUMBER" };
647 const b = exec(ctx, ast.values[1]);
648 if (ctx.error) return;
649 if (b.type != "NUMBER") return { type: "NUMBER" };
650 if (!a.value || !b.value) return { type: "NUMBER" };
651 return {
652 type: "NUMBER",
653 value: a.value.lt(b.value) ? bigInt(1) : bigInt(0)
654 };
655}
656
657function execGt(ctx, ast) {
658 const a = exec(ctx, ast.values[0]);
659 if (ctx.error) return;
660 if (a.type != "NUMBER") return { type: "NUMBER" };
661 const b = exec(ctx, ast.values[1]);
662 if (ctx.error) return;
663 if (b.type != "NUMBER") return { type: "NUMBER" };
664 if (!a.value || !b.value) return { type: "NUMBER" };
665 return {
666 type: "NUMBER",
667 value: a.value.gt(b.value) ? bigInt(1) : bigInt(0)
668 };
669}
670
671function execLte(ctx, ast) {
672 const a = exec(ctx, ast.values[0]);
673 if (ctx.error) return;
674 if (a.type != "NUMBER") return { type: "NUMBER" };
675 const b = exec(ctx, ast.values[1]);
676 if (ctx.error) return;
677 if (b.type != "NUMBER") return { type: "NUMBER" };
678 if (!a.value || !b.value) return { type: "NUMBER" };
679 return {
680 type: "NUMBER",
681 value: a.value.lesserOrEquals(b.value) ? bigInt(1) : bigInt(0)
682 };
683}
684
685function execGte(ctx, ast) {
686 const a = exec(ctx, ast.values[0]);
687 if (ctx.error) return;
688 if (a.type != "NUMBER") return { type: "NUMBER" };
689 const b = exec(ctx, ast.values[1]);
690 if (ctx.error) return;
691 if (b.type != "NUMBER") return { type: "NUMBER" };
692 if (!a.value || !b.value) return { type: "NUMBER" };
693 return {
694 type: "NUMBER",
695 value: a.value.greaterOrEquals(b.value) ? bigInt(1) : bigInt(0)
696 };
697}
698
699
700function execEq(ctx, ast) {
701 const a = exec(ctx, ast.values[0]);
702 if (ctx.error) return;
703 if (a.type != "NUMBER") return { type: "NUMBER" };
704 const b = exec(ctx, ast.values[1]);
705 if (ctx.error) return;
706 if (b.type != "NUMBER") return { type: "NUMBER" };
707 if (!a.value || !b.value) return { type: "NUMBER" };
708 return {
709 type: "NUMBER",
710 value: a.value.eq(b.value) ? bigInt(1) : bigInt(0)
711 };
712}
713
714function execNeq(ctx, ast) {
715 const a = exec(ctx, ast.values[0]);
716 if (ctx.error) return;
717 if (a.type != "NUMBER") return { type: "NUMBER" };
718 const b = exec(ctx, ast.values[1]);
719 if (ctx.error) return;
720 if (b.type != "NUMBER") return { type: "NUMBER" };
721 if (!a.value || !b.value) return { type: "NUMBER" };
722 return {
723 type: "NUMBER",
724 value: a.value.eq(b.value) ? bigInt(0) : bigInt(1)
725 };
726}
727
728
729function execBAnd(ctx, ast) {
730 const a = exec(ctx, ast.values[0]);
731 if (ctx.error) return;
732 if (a.type != "NUMBER") return { type: "NUMBER" };
733 const b = exec(ctx, ast.values[1]);
734 if (ctx.error) return;
735 if (b.type != "NUMBER") return { type: "NUMBER" };
736 if (!a.value || !b.value) return { type: "NUMBER" };
737 return {
738 type: "NUMBER",
739 value: a.value.and(b.value).and(__MASK__)
740 };
741}
742
743function execAnd(ctx, ast) {
744 const a = exec(ctx, ast.values[0]);
745 if (ctx.error) return;
746 if (a.type != "NUMBER") return { type: "NUMBER" };
747 const b = exec(ctx, ast.values[1]);
748 if (ctx.error) return;
749 if (b.type != "NUMBER") return { type: "NUMBER" };
750 if (!a.value || !b.value) return { type: "NUMBER" };
751 return {
752 type: "NUMBER",
753 value: (a.value.neq(0) && a.value.neq(0)) ? bigInt(1) : bigInt(0)
754 };
755}
756
757function execOr(ctx, ast) {
758 const a = exec(ctx, ast.values[0]);
759 if (ctx.error) return;
760 if (a.type != "NUMBER") return { type: "NUMBER" };
761 const b = exec(ctx, ast.values[1]);
762 if (ctx.error) return;
763 if (b.type != "NUMBER") return { type: "NUMBER" };
764 if (!a.value || !b.value) return { type: "NUMBER" };
765 return {
766 type: "NUMBER",
767 value: (a.value.neq(0) || a.value.neq(0)) ? bigInt(1) : bigInt(0)
768 };
769}
770
771function execShl(ctx, ast) {
772 const a = exec(ctx, ast.values[0]);
773 if (ctx.error) return;
774 if (a.type != "NUMBER") return { type: "NUMBER" };
775 const b = exec(ctx, ast.values[1]);
776 if (ctx.error) return;
777 if (b.type != "NUMBER") return { type: "NUMBER" };
778 if (!a.value || !b.value) return { type: "NUMBER" };
779 const v = b.value.greater(256) ? 256 : b.value.value;
780 return {
781 type: "NUMBER",
782 value: a.value.shiftLeft(v).and(__MASK__)
783 };
784}
785
786function execShr(ctx, ast) {
787 const a = exec(ctx, ast.values[0]);
788 if (ctx.error) return;
789 if (a.type != "NUMBER") return { type: "NUMBER" };
790 const b = exec(ctx, ast.values[1]);
791 if (ctx.error) return;
792 if (b.type != "NUMBER") return { type: "NUMBER" };
793 if (!a.value || !b.value) return { type: "NUMBER" };
794 const v = b.value.greater(256) ? 256 : b.value.value;
795 return {
796 type: "NUMBER",
797 value: a.value.shiftRight(v).and(__MASK__)
798 };
799}
800
801function execMod(ctx, ast) {
802 const a = exec(ctx, ast.values[0]);
803 if (ctx.error) return;
804 if (a.type != "NUMBER") return { type: "NUMBER" };
805 const b = exec(ctx, ast.values[1]);
806 if (ctx.error) return;
807 if (b.type != "NUMBER") return { type: "NUMBER" };
808 if (!a.value || !b.value) return { type: "NUMBER" };
809 return {
810 type: "NUMBER",
811 value: a.value.mod(b.value)
812 };
813}
814
815
816function execExp(ctx, ast) {
817 const a = exec(ctx, ast.values[0]);
818 if (ctx.error) return;
819 if (a.type != "NUMBER") return { type: "NUMBER" };
820 const b = exec(ctx, ast.values[1]);
821 if (ctx.error) return;
822 if (b.type != "NUMBER") return { type: "NUMBER" };
823 if (!a.value || !b.value) return { type: "NUMBER" };
824 return {
825 type: "NUMBER",
826 value: a.value.modPow(b.value, __P__)
827 };
828}
829
830function execDiv(ctx, ast) {
831 const a = exec(ctx, ast.values[0]);
832 if (ctx.error) return;
833 if (a.type != "NUMBER") return { type: "NUMBER" };
834 const b = exec(ctx, ast.values[1]);
835 if (ctx.error) return;
836 if (b.type != "NUMBER") return { type: "NUMBER" };
837 if (!a.value || !b.value) return { type: "NUMBER" };
838 if (b.value.isZero()) return error(ctx, ast, "Division by zero");
839 return {
840 type: "NUMBER",
841 value: a.value.times(b.value.modInv(__P__)).mod(__P__)
842 };
843}
844
845function execIDiv(ctx, ast) {
846 const a = exec(ctx, ast.values[0]);
847 if (ctx.error) return;
848 if (a.type != "NUMBER") return { type: "NUMBER" };
849 const b = exec(ctx, ast.values[1]);
850 if (ctx.error) return;
851 if (b.type != "NUMBER") return { type: "NUMBER" };
852 if (!a.value || !b.value) return { type: "NUMBER" };
853 if (b.value.isZero()) return error(ctx, ast, "Division by zero");
854 return {
855 type: "NUMBER",
856 value: a.value.divide(b.value)
857 };
858}
859
860function execAdd(ctx, ast) {
861 const a = exec(ctx, ast.values[0]);
862 if (ctx.error) return;
863 const b = exec(ctx, ast.values[1]);
864 if (ctx.error) return;
865
866 const res = lc.add(a,b);
867 if (res.type == "ERROR") return error(ctx, ast, res.errStr);
868
869 return res;
870}
871
872function execSub(ctx, ast) {
873 const a = exec(ctx, ast.values[0]);
874 if (ctx.error) return;
875 const b = exec(ctx, ast.values[1]);
876 if (ctx.error) return;
877
878 const res = lc.sub(a,b);
879 if (res.type == "ERROR") return error(ctx, ast, res.errStr);
880
881 return res;
882}
883
884function execUMinus(ctx, ast) {
885 const a = exec(ctx, ast.values[0]);
886 if (ctx.error) return;
887
888 const res = lc.negate(a);
889 if (res.type == "ERROR") return error(ctx, ast, res.errStr);
890
891 return res;
892}
893
894function execMul(ctx, ast) {
895 const a = exec(ctx, ast.values[0]);
896 if (ctx.error) return;
897 const b = exec(ctx, ast.values[1]);
898 if (ctx.error) return;
899
900 const res = lc.mul(a,b);
901 if (res.type == "ERROR") return error(ctx, ast, res.errStr);
902
903 return res;
904}
905
906
907function execVarAddAssignement(ctx, ast) {
908 const res = execAdd(ctx,{ values: [ast.values[0], ast.values[1]] } );
909 if (ctx.error) return;
910 return execVarAssignement(ctx, { values: [ast.values[0], res] });
911}
912
913function execVarMulAssignement(ctx, ast) {
914 const res = execMul(ctx,{ values: [ast.values[0], ast.values[1]] } );
915 if (ctx.error) return;
916 return execVarAssignement(ctx, { values: [ast.values[0], res] });
917}
918
919function execPlusPlusRight(ctx, ast) {
920 const resBefore = exec(ctx, ast.values[0]);
921 if (ctx.error) return;
922 const resAfter = execAdd(ctx,{ values: [ast.values[0], {type: "NUMBER", value: bigInt(1)}] } );
923 if (ctx.error) return;
924 execVarAssignement(ctx, { values: [ast.values[0], resAfter] });
925 return resBefore;
926}
927
928function execPlusPlusLeft(ctx, ast) {
929 if (ctx.error) return;
930 const resAfter = execAdd(ctx,{ values: [ast.values[0], {type: "NUMBER", value: bigInt(1)}] } );
931 if (ctx.error) return;
932 execVarAssignement(ctx, { values: [ast.values[0], resAfter] });
933 return resAfter;
934}
935
936function execMinusMinusRight(ctx, ast) {
937 const resBefore = exec(ctx, ast.values[0]);
938 if (ctx.error) return;
939 const resAfter = execSub(ctx,{ values: [ast.values[0], {type: "NUMBER", value: bigInt(1)}] } );
940 if (ctx.error) return;
941 execVarAssignement(ctx, { values: [ast.values[0], resAfter] });
942 return resBefore;
943}
944
945function execMinusMinusLeft(ctx, ast) {
946 if (ctx.error) return;
947 const resAfter = execSub(ctx,{ values: [ast.values[0], {type: "NUMBER", value: bigInt(1)}] } );
948 if (ctx.error) return;
949 execVarAssignement(ctx, { values: [ast.values[0], resAfter] });
950 return resAfter;
951}
952
953function execTerCon(ctx, ast) {
954 const cond = exec(ctx, ast.values[0]);
955 if (ctx.error) return;
956
957 if (!cond.value) return { type: "NUMBER" };
958
959 if (cond.value.neq(0)) {
960 return exec(ctx, ast.values[1]);
961 } else {
962 return exec(ctx, ast.values[2]);
963 }
964}
965
966function execSignalAssign(ctx, ast) {
967 let vDest;
968 if (ast.values[0].type == "DECLARE") {
969 vDest = exec(ctx, ast.values[0]);
970 if (ctx.error) return;
971 } else {
972 vDest = ast.values[0];
973 }
974
975 let dst;
976 if (vDest.type == "VARIABLE") {
977 dst = getScope(ctx, vDest.name, vDest.selectors);
978 if (ctx.error) return;
979 } else if (vDest.type == "PIN") {
980 dst = execPin(ctx, vDest);
981 if (ctx.error) return;
982 } else {
983 error(ctx, ast, "Bad assignement");
984 }
985
986 if (!dst) return error(ctx, ast, "Signal not defined");
987 if (dst.type != "SIGNAL") return error(ctx, ast, "Signal assigned to a non signal");
988
989 let sDest=ctx.signals[dst.fullName];
990 if (!sDest) return error(ctx, ast, "Invalid signal: "+dst.fullName);
991 while (sDest.equivalence) sDest=ctx.signals[sDest.equivalence];
992
993 if (sDest.value) return error(ctx, ast, "Signals cannot be assigned twice");
994
995 let src = exec(ctx, ast.values[1]);
996 if (ctx.error) return;
997
998
999 /*
1000 let vSrc;
1001 if (ast.values[1].type == "DECLARE") {
1002 vSrc = exec(ctx, ast.values[1]);
1003 if (ctx.error) return;
1004 } else {
1005 vSrc = ast.values[1];
1006 }
1007
1008 if (vSrc.type == "VARIABLE") {
1009 src = getScope(ctx, vSrc.name, vSrc.selectors);
1010 if (!src) error(ctx, ast, "Variable not defined: " + vSrc.name);
1011 if (ctx.error) return;
1012 } else if (vSrc.type == "PIN") {
1013 src = execPin(ctx, vSrc);
1014 }
1015 */
1016
1017 let assignValue = true;
1018 if (src.type == "SIGNAL") {
1019 sDest.equivalence = src.fullName;
1020 sDest.alias = sDest.alias.concat(src.alias);
1021 while (sDest.equivalence) sDest=ctx.signals[sDest.equivalence];
1022 assignValue = false;
1023 }
1024
1025 if (assignValue) {
1026 // const resLC = exec(ctx, vSrc);
1027 if (ctx.error) return;
1028
1029 // const v = lc.evaluate(ctx, resLC);
1030 const v = lc.evaluate(ctx, src);
1031
1032 if (v.value) {
1033 sDest.value = v.value;
1034 }
1035 }
1036
1037 return vDest;
1038}
1039
1040function execConstrain(ctx, ast) {
1041 const a = exec(ctx, ast.values[0]);
1042 if (ctx.error) return;
1043 const b = exec(ctx, ast.values[1]);
1044 if (ctx.error) return;
1045
1046 const res = lc.sub(a,b);
1047 if (res.type == "ERROR") return error(ctx, ast, res.errStr);
1048
1049 if (!lc.isZero(res)) {
1050 ctx.constraints.push(lc.toQEQ(res));
1051 }
1052
1053 return res;
1054}
1055
1056function execSignalAssignConstrain(ctx, ast) {
1057 const v = execSignalAssign(ctx,ast);
1058 if (ctx.error) return;
1059 execConstrain(ctx, ast);
1060 if (ctx.error) return;
1061 return v;
1062}
1063
1064function execInclude(ctx, ast) {
1065 const incFileName = path.resolve(ctx.filePath, ast.file);
1066 const incFilePath = path.dirname(incFileName);
1067
1068 ctx.includedFiles = ctx.includedFiles || [];
1069 if (ctx.includedFiles[incFileName]) return;
1070
1071 ctx.includedFiles[incFileName] = true;
1072
1073 const src = fs.readFileSync(incFileName, "utf8");
1074
1075 if (!src) return error(ctx, ast, "Include file not found: "+incFileName);
1076
1077 const incAst = parser.parse(src);
1078
1079 const oldFilePath = ctx.filePath;
1080 const oldFileName = ctx.fileName;
1081 ctx.filePath = incFilePath;
1082 ctx.fileName = incFileName;
1083
1084 exec(ctx, incAst);
1085
1086 ast.block = incAst;
1087
1088 ctx.filePath = oldFilePath;
1089 ctx.fileName = oldFileName;
1090}
1091
1092function execArray(ctx, ast) {
1093 const res = [];
1094
1095 for (let i=0; i<ast.values.length; i++) {
1096 res.push(exec(ctx, ast.values[i]));
1097 }
1098
1099 return res;
1100}
1101
1102function copyScope(scope) {
1103 var scopesClone = [];
1104 for (let i=0; i<scope.length; i++) {
1105 scopesClone.push(scope[i]);
1106 }
1107 return scopesClone;
1108}
1109