hg/bck2brwsr: rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@f5c9934a252c

     1 /**

     2  * Back 2 Browser Bytecode Translator

     3  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, version 2 of the License.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program. Look for COPYING file in the top folder.

    16  * If not, see http://opensource.org/licenses/GPL-2.0.

    17  */

    18 package org.apidesign.vm4brwsr;

    20 import java.io.IOException;

    21 import java.io.InputStream;

    22 import static org.apidesign.vm4brwsr.ByteCodeParser.*;

    24 /** Translator of the code inside class files to JavaScript.

    25  *

    26  * @author Jaroslav Tulach <jtulach@netbeans.org>

    27  */

    28 abstract class ByteCodeToJavaScript {

    29     private ClassData jc;

    30     final Appendable out;

    32     protected ByteCodeToJavaScript(Appendable out) {

    33         this.out = out;

    34     }

    36     /* Collects additional required resources.

    37      *

    38      * @param internalClassName classes that were referenced and should be loaded in order the

    39      *   generated JavaScript code works properly. The names are in internal

    40      *   JVM form so String is <code>java/lang/String</code>.

    41      */

    42     protected abstract boolean requireReference(String internalClassName);

    44     /*

    45      * @param resourcePath name of resources to read

    46      */

    47     protected abstract void requireScript(String resourcePath) throws IOException;

    49     /** Allows subclasses to redefine what field a function representing a

    50      * class gets assigned. By default it returns the suggested name followed

    51      * by <code>" = "</code>;

    52      *

    53      * @param className suggested name of the class

    54      */

    55     /* protected */ String assignClass(String className) {

    56         return className + " = ";

    57     }

    58     /* protected */ String accessClass(String classOperation) {

    59         return classOperation;

    60     }

    62     protected String accessMember(String object, String mangledName,

    63                                   String[] fieldInfoName) throws IOException {

    64         return object + "." + mangledName;

    65     }

    67     protected void declaredClass(ClassData classData, String mangledName)

    68             throws IOException {

    69     }

    71     protected void declaredField(FieldData fieldData,

    72                                  String destObject,

    73                                  String mangledName) throws IOException {

    74     }

    76     protected void declaredMethod(MethodData methodData,

    77                                   String destObject,

    78                                   String mangledName) throws IOException {

    79     }

    81     /** Prints out a debug message.

    82      *

    83      * @param msg the message

    84      * @return true if the message has been printed

    85      * @throws IOException

    86      */

    87     boolean debug(String msg) throws IOException {

    88         out.append(msg);

    89         return true;

    90     }

    92     /**

    93      * Converts a given class file to a JavaScript version.

    94      *

    95      * @param classFile input stream with code of the .class file

    96      * @return the initialization code for this class, if any. Otherwise <code>null</code>

    97      *

    98      * @throws IOException if something goes wrong during read or write or translating

    99      */

   101     public String compile(InputStream classFile) throws IOException {

   102         return compile(new ClassData(classFile));

   103     }

   105     protected String compile(ClassData classData) throws IOException {

   106         this.jc = classData;

   107         if (jc.getMajor_version() < 50) {

   108             throw new IOException("Can't compile " + jc.getClassName() + ". Class file version " + jc.getMajor_version() + "."

   109                 + jc.getMinor_version() + " - recompile with -target 1.6 (at least)."

   110             );

   111         }

   112         byte[] arrData = jc.findAnnotationData(true);

   113         String[] arr = findAnnotation(arrData, jc,

   114             "org.apidesign.bck2brwsr.core.ExtraJavaScript",

   115             "resource", "processByteCode"

   116         );

   117         if (arr != null) {

   118             if (!arr[0].isEmpty()) {

   119                 requireScript(arr[0]);

   120             }

   121             if ("0".equals(arr[1])) {

   122                 return null;

   123             }

   124         }

   125         String[] proto = findAnnotation(arrData, jc,

   126             "org.apidesign.bck2brwsr.core.JavaScriptPrototype",

   127             "container", "prototype"

   128         );

   129         StringArray toInitilize = new StringArray();

   130         final String className = className(jc);

   131         out.append("\n\n").append(assignClass(className));

   132         out.append("function ").append(className).append("() {");

   133         out.append("\n  var CLS = ").append(className).append(';');

   134         out.append("\n  if (!CLS.$class) {");

   135         if (proto == null) {

   136             String sc = jc.getSuperClassName(); // with _

   137             out.append("\n    var pp = ").

   138                 append(accessClass(sc.replace('/', '_'))).append("(true);");

   139             out.append("\n    var p = CLS.prototype = pp;");

   140             out.append("\n    var c = p;");

   141             out.append("\n    var sprcls = pp.constructor.$class;");

   142         } else {

   143             out.append("\n    var p = CLS.prototype = ").append(proto[1]).append(";");

   144             if (proto[0] == null) {

   145                 proto[0] = "p";

   146             }

   147             out.append("\n    var c = ").append(proto[0]).append(";");

   148             out.append("\n    var sprcls = null;");

   149         }

   150         for (FieldData v : jc.getFields()) {

   151             if (v.isStatic()) {

   152                 out.append("\n  CLS.").append(v.getName()).append(initField(v));

   153                 out.append("\n  c._").append(v.getName()).append(" = function (v) {")

   154                    .append("  if (arguments.length == 1) CLS.").append(v.getName())

   155                    .append(" = v; return CLS.").

   156                     append(v.getName()).append("; };");

   157             } else {

   158                 out.append("\n  c._").append(v.getName()).append(" = function (v) {")

   159                    .append("  if (arguments.length == 1) this.fld_").

   160                     append(className).append('_').append(v.getName())

   161                    .append(" = v; return this.fld_").

   162                     append(className).append('_').append(v.getName())

   163                    .append("; };");

   164             }

   166             declaredField(v, "c", "_" + v.getName());

   167         }

   168         for (MethodData m : jc.getMethods()) {

   169             byte[] onlyArr = m.findAnnotationData(true);

   170             String[] only = findAnnotation(onlyArr, jc,

   171                 "org.apidesign.bck2brwsr.core.JavaScriptOnly",

   172                 "name", "value"

   173             );

   174             if (only != null) {

   175                 if (only[0] != null && only[1] != null) {

   176                     out.append("\n    p.").append(only[0]).append(" = ")

   177                         .append(only[1]).append(";");

   178                 }

   179                 continue;

   180             }

   181             String destObject;

   182             String mn;

   183             out.append("\n    ");

   184             if (m.isStatic()) {

   185                 destObject = "c";

   186                 mn = generateStaticMethod(destObject, m, toInitilize);

   187             } else {

   188                 if (m.isConstructor()) {

   189                     destObject = "CLS";

   190                     mn = generateInstanceMethod(destObject, m);

   191                 } else {

   192                     destObject = "c";

   193                     mn = generateInstanceMethod(destObject, m);

   194                 }

   195             }

   196             declaredMethod(m, destObject, mn);

   197             byte[] runAnno = m.findAnnotationData(false);

   198             if (runAnno != null) {

   199                 out.append("\n    ").append(destObject).append(".").append(mn).append(".anno = {");

   200                 generateAnno(jc, out, runAnno);

   201                 out.append("\n    };");

   202             }

   203             out.append("\n    ").append(destObject).append(".").append(mn).append(".access = " + m.getAccess()).append(";");

   204             out.append("\n    ").append(destObject).append(".").append(mn).append(".cls = CLS;");

   205         }

   206         out.append("\n    c.constructor = CLS;");

   207         out.append("\n    c['$instOf_").append(className).append("'] = true;");

   208         for (String superInterface : jc.getSuperInterfaces()) {

   209             out.append("\n    c['$instOf_").append(superInterface.replace('/', '_')).append("'] = true;");

   210         }

   211         out.append("\n    CLS.$class = 'temp';");

   212         out.append("\n    CLS.$class = ");

   213         out.append(accessClass("java_lang_Class(true);"));

   214         out.append("\n    CLS.$class.jvmName = '").append(jc.getClassName()).append("';");

   215         out.append("\n    CLS.$class.superclass = sprcls;");

   216         out.append("\n    CLS.$class.access = ").append(jc.getAccessFlags()+";");

   217         out.append("\n    CLS.$class.cnstr = CLS;");

   218         byte[] classAnno = jc.findAnnotationData(false);

   219         if (classAnno != null) {

   220             out.append("\n    CLS.$class.anno = {");

   221             generateAnno(jc, out, classAnno);

   222             out.append("\n    };");

   223         }

   224         for (String init : toInitilize.toArray()) {

   225             out.append("\n    ").append(init).append("();");

   226         }

   227         out.append("\n  }");

   228         out.append("\n  if (arguments.length === 0) {");

   229         out.append("\n    if (!(this instanceof CLS)) {");

   230         out.append("\n      return new CLS();");

   231         out.append("\n    }");

   232         for (FieldData v : jc.getFields()) {

   233             byte[] onlyArr = v.findAnnotationData(true);

   234             String[] only = findAnnotation(onlyArr, jc,

   235                 "org.apidesign.bck2brwsr.core.JavaScriptOnly",

   236                 "name", "value"

   237             );

   238             if (only != null) {

   239                 if (only[0] != null && only[1] != null) {

   240                     out.append("\n    p.").append(only[0]).append(" = ")

   241                         .append(only[1]).append(";");

   242                 }

   243                 continue;

   244             }

   245             if (!v.isStatic()) {

   246                 out.append("\n    this.fld_").

   247                     append(className).append('_').

   248                     append(v.getName()).append(initField(v));

   249             }

   250         }

   251         out.append("\n    return this;");

   252         out.append("\n  }");

   253         out.append("\n  return arguments[0] ? new CLS() : CLS.prototype;");

   254         out.append("\n};");

   256         declaredClass(jc, className);

   258 //        StringBuilder sb = new StringBuilder();

   259 //        for (String init : toInitilize.toArray()) {

   260 //            sb.append("\n").append(init).append("();");

   261 //        }

   262         return "";

   263     }

   264     private String generateStaticMethod(String destObject, MethodData m, StringArray toInitilize) throws IOException {

   265         String jsb = javaScriptBody(destObject, m, true);

   266         if (jsb != null) {

   267             return jsb;

   268         }

   269         final String mn = findMethodName(m, new StringBuilder());

   270         if (mn.equals("class__V")) {

   271             toInitilize.add(accessClass(className(jc)) + "(false)." + mn);

   272         }

   273         generateMethod(destObject, mn, m);

   274         return mn;

   275     }

   277     private String generateInstanceMethod(String destObject, MethodData m) throws IOException {

   278         String jsb = javaScriptBody(destObject, m, false);

   279         if (jsb != null) {

   280             return jsb;

   281         }

   282         final String mn = findMethodName(m, new StringBuilder());

   283         generateMethod(destObject, mn, m);

   284         return mn;

   285     }

   287     private void generateMethod(String destObject, String name, MethodData m)

   288             throws IOException {

   289         final StackMapIterator stackMapIterator = m.createStackMapIterator();

   290         TrapDataIterator trap = m.getTrapDataIterator();

   291         final LocalsMapper lmapper =

   292                 new LocalsMapper(stackMapIterator.getArguments());

   294         out.append(destObject).append(".").append(name).append(" = function(");

   295         lmapper.outputArguments(out, m.isStatic());

   296         out.append(") {").append("\n");

   298         final byte[] byteCodes = m.getCode();

   299         if (byteCodes == null) {

   300             out.append("  throw 'no code found for ")

   301                .append(jc.getClassName()).append('.')

   302                .append(m.getName()).append("';\n");

   303             out.append("};");

   304             return;

   305         }

   307         final StackMapper smapper = new StackMapper();

   309         if (!m.isStatic()) {

   310             out.append("  var ").append(" lcA0 = this;\n");

   311         }

   313         int lastStackFrame = -1;

   314         TrapData[] previousTrap = null;

   315         boolean wide = false;

   317         out.append("\n  var gt = 0;\n");

   318         int openBraces = 0;

   319         int topMostLabel = 0;

   320         for (int i = 0; i < byteCodes.length; i++) {

   321             int prev = i;

   322             stackMapIterator.advanceTo(i);

   323             boolean changeInCatch = trap.advanceTo(i);

   324             if (changeInCatch || lastStackFrame != stackMapIterator.getFrameIndex()) {

   325                 if (previousTrap != null) {

   326                     generateCatch(previousTrap, i, topMostLabel);

   327                     previousTrap = null;

   328                 }

   329             }

   330             if (lastStackFrame != stackMapIterator.getFrameIndex()) {

   331                 if (i != 0) {

   332                     out.append("    }\n");

   333                 }

   334                 if (openBraces > 64) {

   335                     for (int c = 0; c < 64; c++) {

   336                         out.append("break;}\n");

   337                     }

   338                     openBraces = 1;

   339                     topMostLabel = i;

   340                 }

   342                 lastStackFrame = stackMapIterator.getFrameIndex();

   343                 lmapper.syncWithFrameLocals(stackMapIterator.getFrameLocals());

   344                 smapper.syncWithFrameStack(stackMapIterator.getFrameStack());

   345                 out.append("    X_" + i).append(": for (;;) { IF: if (gt <= " + i + ") {\n");

   346                 openBraces++;

   347                 changeInCatch = true;

   348             } else {

   349                 debug("    /* " + i + " */ ");

   350             }

   351             if (changeInCatch && trap.useTry()) {

   352                 out.append("try {");

   353                 previousTrap = trap.current();

   354             }

   355             final int c = readUByte(byteCodes, i);

   356             switch (c) {

   357                 case opc_aload_0:

   358                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(0));

   359                     break;

   360                 case opc_iload_0:

   361                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(0));

   362                     break;

   363                 case opc_lload_0:

   364                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(0));

   365                     break;

   366                 case opc_fload_0:

   367                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(0));

   368                     break;

   369                 case opc_dload_0:

   370                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(0));

   371                     break;

   372                 case opc_aload_1:

   373                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(1));

   374                     break;

   375                 case opc_iload_1:

   376                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(1));

   377                     break;

   378                 case opc_lload_1:

   379                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(1));

   380                     break;

   381                 case opc_fload_1:

   382                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(1));

   383                     break;

   384                 case opc_dload_1:

   385                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(1));

   386                     break;

   387                 case opc_aload_2:

   388                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(2));

   389                     break;

   390                 case opc_iload_2:

   391                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(2));

   392                     break;

   393                 case opc_lload_2:

   394                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(2));

   395                     break;

   396                 case opc_fload_2:

   397                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(2));

   398                     break;

   399                 case opc_dload_2:

   400                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(2));

   401                     break;

   402                 case opc_aload_3:

   403                     emit(out, "var @1 = @2;", smapper.pushA(), lmapper.getA(3));

   404                     break;

   405                 case opc_iload_3:

   406                     emit(out, "var @1 = @2;", smapper.pushI(), lmapper.getI(3));

   407                     break;

   408                 case opc_lload_3:

   409                     emit(out, "var @1 = @2;", smapper.pushL(), lmapper.getL(3));

   410                     break;

   411                 case opc_fload_3:

   412                     emit(out, "var @1 = @2;", smapper.pushF(), lmapper.getF(3));

   413                     break;

   414                 case opc_dload_3:

   415                     emit(out, "var @1 = @2;", smapper.pushD(), lmapper.getD(3));

   416                     break;

   417                 case opc_iload: {

   418                     ++i;

   419                     final int indx = wide ? readUShort(byteCodes, i++)

   420                                           : readUByte(byteCodes, i);

   421                     wide = false;

   422                     emit(out, "var @1 = @2;",

   423                          smapper.pushI(), lmapper.getI(indx));

   424                     break;

   425                 }

   426                 case opc_lload: {

   427                     ++i;

   428                     final int indx = wide ? readUShort(byteCodes, i++)

   429                                           : readUByte(byteCodes, i);

   430                     wide = false;

   431                     emit(out, "var @1 = @2;",

   432                          smapper.pushL(), lmapper.getL(indx));

   433                     break;

   434                 }

   435                 case opc_fload: {

   436                     ++i;

   437                     final int indx = wide ? readUShort(byteCodes, i++)

   438                                           : readUByte(byteCodes, i);

   439                     wide = false;

   440                     emit(out, "var @1 = @2;",

   441                          smapper.pushF(), lmapper.getF(indx));

   442                     break;

   443                 }

   444                 case opc_dload: {

   445                     ++i;

   446                     final int indx = wide ? readUShort(byteCodes, i++)

   447                                           : readUByte(byteCodes, i);

   448                     wide = false;

   449                     emit(out, "var @1 = @2;",

   450                          smapper.pushD(), lmapper.getD(indx));

   451                     break;

   452                 }

   453                 case opc_aload: {

   454                     ++i;

   455                     final int indx = wide ? readUShort(byteCodes, i++)

   456                                           : readUByte(byteCodes, i);

   457                     wide = false;

   458                     emit(out, "var @1 = @2;",

   459                          smapper.pushA(), lmapper.getA(indx));

   460                     break;

   461                 }

   462                 case opc_istore: {

   463                     ++i;

   464                     final int indx = wide ? readUShort(byteCodes, i++)

   465                                           : readUByte(byteCodes, i);

   466                     wide = false;

   467                     emit(out, "var @1 = @2;",

   468                          lmapper.setI(indx), smapper.popI());

   469                     break;

   470                 }

   471                 case opc_lstore: {

   472                     ++i;

   473                     final int indx = wide ? readUShort(byteCodes, i++)

   474                                           : readUByte(byteCodes, i);

   475                     wide = false;

   476                     emit(out, "var @1 = @2;",

   477                          lmapper.setL(indx), smapper.popL());

   478                     break;

   479                 }

   480                 case opc_fstore: {

   481                     ++i;

   482                     final int indx = wide ? readUShort(byteCodes, i++)

   483                                           : readUByte(byteCodes, i);

   484                     wide = false;

   485                     emit(out, "var @1 = @2;",

   486                          lmapper.setF(indx), smapper.popF());

   487                     break;

   488                 }

   489                 case opc_dstore: {

   490                     ++i;

   491                     final int indx = wide ? readUShort(byteCodes, i++)

   492                                           : readUByte(byteCodes, i);

   493                     wide = false;

   494                     emit(out, "var @1 = @2;",

   495                          lmapper.setD(indx), smapper.popD());

   496                     break;

   497                 }

   498                 case opc_astore: {

   499                     ++i;

   500                     final int indx = wide ? readUShort(byteCodes, i++)

   501                                           : readUByte(byteCodes, i);

   502                     wide = false;

   503                     emit(out, "var @1 = @2;",

   504                          lmapper.setA(indx), smapper.popA());

   505                     break;

   506                 }

   507                 case opc_astore_0:

   508                     emit(out, "var @1 = @2;", lmapper.setA(0), smapper.popA());

   509                     break;

   510                 case opc_istore_0:

   511                     emit(out, "var @1 = @2;", lmapper.setI(0), smapper.popI());

   512                     break;

   513                 case opc_lstore_0:

   514                     emit(out, "var @1 = @2;", lmapper.setL(0), smapper.popL());

   515                     break;

   516                 case opc_fstore_0:

   517                     emit(out, "var @1 = @2;", lmapper.setF(0), smapper.popF());

   518                     break;

   519                 case opc_dstore_0:

   520                     emit(out, "var @1 = @2;", lmapper.setD(0), smapper.popD());

   521                     break;

   522                 case opc_astore_1:

   523                     emit(out, "var @1 = @2;", lmapper.setA(1), smapper.popA());

   524                     break;

   525                 case opc_istore_1:

   526                     emit(out, "var @1 = @2;", lmapper.setI(1), smapper.popI());

   527                     break;

   528                 case opc_lstore_1:

   529                     emit(out, "var @1 = @2;", lmapper.setL(1), smapper.popL());

   530                     break;

   531                 case opc_fstore_1:

   532                     emit(out, "var @1 = @2;", lmapper.setF(1), smapper.popF());

   533                     break;

   534                 case opc_dstore_1:

   535                     emit(out, "var @1 = @2;", lmapper.setD(1), smapper.popD());

   536                     break;

   537                 case opc_astore_2:

   538                     emit(out, "var @1 = @2;", lmapper.setA(2), smapper.popA());

   539                     break;

   540                 case opc_istore_2:

   541                     emit(out, "var @1 = @2;", lmapper.setI(2), smapper.popI());

   542                     break;

   543                 case opc_lstore_2:

   544                     emit(out, "var @1 = @2;", lmapper.setL(2), smapper.popL());

   545                     break;

   546                 case opc_fstore_2:

   547                     emit(out, "var @1 = @2;", lmapper.setF(2), smapper.popF());

   548                     break;

   549                 case opc_dstore_2:

   550                     emit(out, "var @1 = @2;", lmapper.setD(2), smapper.popD());

   551                     break;

   552                 case opc_astore_3:

   553                     emit(out, "var @1 = @2;", lmapper.setA(3), smapper.popA());

   554                     break;

   555                 case opc_istore_3:

   556                     emit(out, "var @1 = @2;", lmapper.setI(3), smapper.popI());

   557                     break;

   558                 case opc_lstore_3:

   559                     emit(out, "var @1 = @2;", lmapper.setL(3), smapper.popL());

   560                     break;

   561                 case opc_fstore_3:

   562                     emit(out, "var @1 = @2;", lmapper.setF(3), smapper.popF());

   563                     break;

   564                 case opc_dstore_3:

   565                     emit(out, "var @1 = @2;", lmapper.setD(3), smapper.popD());

   566                     break;

   567                 case opc_iadd:

   568                     emit(out, "@1 = @1.add32(@2);", smapper.getI(1), smapper.popI());

   569                     break;

   570                 case opc_ladd:

   571                     emit(out, "@1 = @1.add64(@2);", smapper.getL(1), smapper.popL());

   572                     break;

   573                 case opc_fadd:

   574                     emit(out, "@1 += @2;", smapper.getF(1), smapper.popF());

   575                     break;

   576                 case opc_dadd:

   577                     emit(out, "@1 += @2;", smapper.getD(1), smapper.popD());

   578                     break;

   579                 case opc_isub:

   580                     emit(out, "@1 = @1.sub32(@2);", smapper.getI(1), smapper.popI());

   581                     break;

   582                 case opc_lsub:

   583                     emit(out, "@1 = @1.sub64(@2);", smapper.getL(1), smapper.popL());

   584                     break;

   585                 case opc_fsub:

   586                     emit(out, "@1 -= @2;", smapper.getF(1), smapper.popF());

   587                     break;

   588                 case opc_dsub:

   589                     emit(out, "@1 -= @2;", smapper.getD(1), smapper.popD());

   590                     break;

   591                 case opc_imul:

   592                     emit(out, "@1 = @1.mul32(@2);", smapper.getI(1), smapper.popI());

   593                     break;

   594                 case opc_lmul:

   595                     emit(out, "@1 = @1.mul64(@2);", smapper.getL(1), smapper.popL());

   596                     break;

   597                 case opc_fmul:

   598                     emit(out, "@1 *= @2;", smapper.getF(1), smapper.popF());

   599                     break;

   600                 case opc_dmul:

   601                     emit(out, "@1 *= @2;", smapper.getD(1), smapper.popD());

   602                     break;

   603                 case opc_idiv:

   604                     emit(out, "@1 = @1.div32(@2);",

   605                          smapper.getI(1), smapper.popI());

   606                     break;

   607                 case opc_ldiv:

   608                     emit(out, "@1 = @1.div64(@2);",

   609                          smapper.getL(1), smapper.popL());

   610                     break;

   611                 case opc_fdiv:

   612                     emit(out, "@1 /= @2;", smapper.getF(1), smapper.popF());

   613                     break;

   614                 case opc_ddiv:

   615                     emit(out, "@1 /= @2;", smapper.getD(1), smapper.popD());

   616                     break;

   617                 case opc_irem:

   618                     emit(out, "@1 = @1.mod32(@2);",

   619                          smapper.getI(1), smapper.popI());

   620                     break;

   621                 case opc_lrem:

   622                     emit(out, "@1 = @1.mod64(@2);",

   623                          smapper.getL(1), smapper.popL());

   624                     break;

   625                 case opc_frem:

   626                     emit(out, "@1 %= @2;", smapper.getF(1), smapper.popF());

   627                     break;

   628                 case opc_drem:

   629                     emit(out, "@1 %= @2;", smapper.getD(1), smapper.popD());

   630                     break;

   631                 case opc_iand:

   632                     emit(out, "@1 &= @2;", smapper.getI(1), smapper.popI());

   633                     break;

   634                 case opc_land:

   635                     emit(out, "@1 = @1.and64(@2);", smapper.getL(1), smapper.popL());

   636                     break;

   637                 case opc_ior:

   638                     emit(out, "@1 |= @2;", smapper.getI(1), smapper.popI());

   639                     break;

   640                 case opc_lor:

   641                     emit(out, "@1 = @1.or64(@2);", smapper.getL(1), smapper.popL());

   642                     break;

   643                 case opc_ixor:

   644                     emit(out, "@1 ^= @2;", smapper.getI(1), smapper.popI());

   645                     break;

   646                 case opc_lxor:

   647                     emit(out, "@1 = @1.xor64(@2);", smapper.getL(1), smapper.popL());

   648                     break;

   649                 case opc_ineg:

   650                     emit(out, "@1 = @1.neg32();", smapper.getI(0));

   651                     break;

   652                 case opc_lneg:

   653                     emit(out, "@1 = @1.neg64();", smapper.getL(0));

   654                     break;

   655                 case opc_fneg:

   656                     emit(out, "@1 = -@1;", smapper.getF(0));

   657                     break;

   658                 case opc_dneg:

   659                     emit(out, "@1 = -@1;", smapper.getD(0));

   660                     break;

   661                 case opc_ishl:

   662                     emit(out, "@1 <<= @2;", smapper.getI(1), smapper.popI());

   663                     break;

   664                 case opc_lshl:

   665                     emit(out, "@1 = @1.shl64(@2);", smapper.getL(1), smapper.popI());

   666                     break;

   667                 case opc_ishr:

   668                     emit(out, "@1 >>= @2;", smapper.getI(1), smapper.popI());

   669                     break;

   670                 case opc_lshr:

   671                     emit(out, "@1 = @1.shr64(@2);", smapper.getL(1), smapper.popI());

   672                     break;

   673                 case opc_iushr:

   674                     emit(out, "@1 >>>= @2;", smapper.getI(1), smapper.popI());

   675                     break;

   676                 case opc_lushr:

   677                     emit(out, "@1 = @1.ushr64(@2);", smapper.getL(1), smapper.popI());

   678                     break;

   679                 case opc_iinc: {

   680                     ++i;

   681                     final int varIndx = wide ? readUShort(byteCodes, i++)

   682                                              : readUByte(byteCodes, i);

   683                     ++i;

   684                     final int incrBy = wide ? readShort(byteCodes, i++)

   685                                             : byteCodes[i];

   686                     wide = false;

   687                     if (incrBy == 1) {

   688                         emit(out, "@1++;", lmapper.getI(varIndx));

   689                     } else {

   690                         emit(out, "@1 += @2;",

   691                              lmapper.getI(varIndx),

   692                              Integer.toString(incrBy));

   693                     }

   694                     break;

   695                 }

   696                 case opc_return:

   697                     emit(out, "return;");

   698                     break;

   699                 case opc_ireturn:

   700                     emit(out, "return @1;", smapper.popI());

   701                     break;

   702                 case opc_lreturn:

   703                     emit(out, "return @1;", smapper.popL());

   704                     break;

   705                 case opc_freturn:

   706                     emit(out, "return @1;", smapper.popF());

   707                     break;

   708                 case opc_dreturn:

   709                     emit(out, "return @1;", smapper.popD());

   710                     break;

   711                 case opc_areturn:

   712                     emit(out, "return @1;", smapper.popA());

   713                     break;

   714                 case opc_i2l:

   715                     emit(out, "var @2 = @1;", smapper.popI(), smapper.pushL());

   716                     break;

   717                 case opc_i2f:

   718                     emit(out, "var @2 = @1;", smapper.popI(), smapper.pushF());

   719                     break;

   720                 case opc_i2d:

   721                     emit(out, "var @2 = @1;", smapper.popI(), smapper.pushD());

   722                     break;

   723                 case opc_l2i:

   724                     emit(out, "var @2 = @1.toInt32();", smapper.popL(), smapper.pushI());

   725                     break;

   726                     // max int check?

   727                 case opc_l2f:

   728                     emit(out, "var @2 = @1.toFP();", smapper.popL(), smapper.pushF());

   729                     break;

   730                 case opc_l2d:

   731                     emit(out, "var @2 = @1.toFP();", smapper.popL(), smapper.pushD());

   732                     break;

   733                 case opc_f2d:

   734                     emit(out, "var @2 = @1;", smapper.popF(), smapper.pushD());

   735                     break;

   736                 case opc_d2f:

   737                     emit(out, "var @2 = @1;", smapper.popD(), smapper.pushF());

   738                     break;

   739                 case opc_f2i:

   740                     emit(out, "var @2 = @1.toInt32();",

   741                          smapper.popF(), smapper.pushI());

   742                     break;

   743                 case opc_f2l:

   744                     emit(out, "var @2 = @1.toLong();",

   745                          smapper.popF(), smapper.pushL());

   746                     break;

   747                 case opc_d2i:

   748                     emit(out, "var @2 = @1.toInt32();",

   749                          smapper.popD(), smapper.pushI());

   750                     break;

   751                 case opc_d2l:

   752                     emit(out, "var @2 = @1.toLong();",

   753                          smapper.popD(), smapper.pushL());

   754                     break;

   755                 case opc_i2b:

   756                     emit(out, "var @1 = @1.toInt8();", smapper.getI(0));

   757                     break;

   758                 case opc_i2c:

   759                     out.append("{ /* number conversion */ }");

   760                     break;

   761                 case opc_i2s:

   762                     emit(out, "var @1 = @1.toInt16();", smapper.getI(0));

   763                     break;

   764                 case opc_aconst_null:

   765                     emit(out, "var @1 = null;", smapper.pushA());

   766                     break;

   767                 case opc_iconst_m1:

   768                     emit(out, "var @1 = -1;", smapper.pushI());

   769                     break;

   770                 case opc_iconst_0:

   771                     emit(out, "var @1 = 0;", smapper.pushI());

   772                     break;

   773                 case opc_dconst_0:

   774                     emit(out, "var @1 = 0;", smapper.pushD());

   775                     break;

   776                 case opc_lconst_0:

   777                     emit(out, "var @1 = 0;", smapper.pushL());

   778                     break;

   779                 case opc_fconst_0:

   780                     emit(out, "var @1 = 0;", smapper.pushF());

   781                     break;

   782                 case opc_iconst_1:

   783                     emit(out, "var @1 = 1;", smapper.pushI());

   784                     break;

   785                 case opc_lconst_1:

   786                     emit(out, "var @1 = 1;", smapper.pushL());

   787                     break;

   788                 case opc_fconst_1:

   789                     emit(out, "var @1 = 1;", smapper.pushF());

   790                     break;

   791                 case opc_dconst_1:

   792                     emit(out, "var @1 = 1;", smapper.pushD());

   793                     break;

   794                 case opc_iconst_2:

   795                     emit(out, "var @1 = 2;", smapper.pushI());

   796                     break;

   797                 case opc_fconst_2:

   798                     emit(out, "var @1 = 2;", smapper.pushF());

   799                     break;

   800                 case opc_iconst_3:

   801                     emit(out, "var @1 = 3;", smapper.pushI());

   802                     break;

   803                 case opc_iconst_4:

   804                     emit(out, "var @1 = 4;", smapper.pushI());

   805                     break;

   806                 case opc_iconst_5:

   807                     emit(out, "var @1 = 5;", smapper.pushI());

   808                     break;

   809                 case opc_ldc: {

   810                     int indx = readUByte(byteCodes, ++i);

   811                     String v = encodeConstant(indx);

   812                     int type = VarType.fromConstantType(jc.getTag(indx));

   813                     emit(out, "var @1 = @2;", smapper.pushT(type), v);

   814                     break;

   815                 }

   816                 case opc_ldc_w:

   817                 case opc_ldc2_w: {

   818                     int indx = readUShortArg(byteCodes, i);

   819                     i += 2;

   820                     String v = encodeConstant(indx);

   821                     int type = VarType.fromConstantType(jc.getTag(indx));

   822                     if (type == VarType.LONG) {

   823                         final Long lv = new Long(v);

   824                         final int low = (int)(lv.longValue() & 0xFFFFFFFF);

   825                         final int hi = (int)(lv.longValue() >> 32);

   826                         emit(out, "var @1 = 0x@3.next32(0x@2);", smapper.pushL(),

   827                                 Integer.toHexString(low), Integer.toHexString(hi));

   828                     } else {

   829                         emit(out, "var @1 = @2;", smapper.pushT(type), v);

   830                     }

   831                     break;

   832                 }

   833                 case opc_lcmp:

   834                     emit(out, "var @3 = @2.compare64(@1);",

   835                          smapper.popL(), smapper.popL(), smapper.pushI());

   836                     break;

   837                 case opc_fcmpl:

   838                 case opc_fcmpg:

   839                     emit(out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",

   840                          smapper.popF(), smapper.popF(), smapper.pushI());

   841                     break;

   842                 case opc_dcmpl:

   843                 case opc_dcmpg:

   844                     emit(out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",

   845                          smapper.popD(), smapper.popD(), smapper.pushI());

   846                     break;

   847                 case opc_if_acmpeq:

   848                     i = generateIf(byteCodes, i, smapper.popA(), smapper.popA(),

   849                                    "===", topMostLabel);

   850                     break;

   851                 case opc_if_acmpne:

   852                     i = generateIf(byteCodes, i, smapper.popA(), smapper.popA(),

   853                                    "!==", topMostLabel);

   854                     break;

   855                 case opc_if_icmpeq:

   856                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   857                                    "==", topMostLabel);

   858                     break;

   859                 case opc_ifeq: {

   860                     int indx = i + readShortArg(byteCodes, i);

   861                     emitIf(out, "if (@1 == 0) ",

   862                          smapper.popI(), i, indx, topMostLabel);

   863                     i += 2;

   864                     break;

   865                 }

   866                 case opc_ifne: {

   867                     int indx = i + readShortArg(byteCodes, i);

   868                     emitIf(out, "if (@1 != 0) ",

   869                          smapper.popI(), i, indx, topMostLabel);

   870                     i += 2;

   871                     break;

   872                 }

   873                 case opc_iflt: {

   874                     int indx = i + readShortArg(byteCodes, i);

   875                     emitIf(out, "if (@1 < 0) ",

   876                          smapper.popI(), i, indx, topMostLabel);

   877                     i += 2;

   878                     break;

   879                 }

   880                 case opc_ifle: {

   881                     int indx = i + readShortArg(byteCodes, i);

   882                     emitIf(out, "if (@1 <= 0) ",

   883                          smapper.popI(), i, indx, topMostLabel);

   884                     i += 2;

   885                     break;

   886                 }

   887                 case opc_ifgt: {

   888                     int indx = i + readShortArg(byteCodes, i);

   889                     emitIf(out, "if (@1 > 0) ",

   890                          smapper.popI(), i, indx, topMostLabel);

   891                     i += 2;

   892                     break;

   893                 }

   894                 case opc_ifge: {

   895                     int indx = i + readShortArg(byteCodes, i);

   896                     emitIf(out, "if (@1 >= 0) ",

   897                          smapper.popI(), i, indx, topMostLabel);

   898                     i += 2;

   899                     break;

   900                 }

   901                 case opc_ifnonnull: {

   902                     int indx = i + readShortArg(byteCodes, i);

   903                     emitIf(out, "if (@1 !== null) ",

   904                          smapper.popA(), i, indx, topMostLabel);

   905                     i += 2;

   906                     break;

   907                 }

   908                 case opc_ifnull: {

   909                     int indx = i + readShortArg(byteCodes, i);

   910                     emitIf(out, "if (@1 === null) ",

   911                          smapper.popA(), i, indx, topMostLabel);

   912                     i += 2;

   913                     break;

   914                 }

   915                 case opc_if_icmpne:

   916                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   917                                    "!=", topMostLabel);

   918                     break;

   919                 case opc_if_icmplt:

   920                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   921                                    "<", topMostLabel);

   922                     break;

   923                 case opc_if_icmple:

   924                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   925                                    "<=", topMostLabel);

   926                     break;

   927                 case opc_if_icmpgt:

   928                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   929                                    ">", topMostLabel);

   930                     break;

   931                 case opc_if_icmpge:

   932                     i = generateIf(byteCodes, i, smapper.popI(), smapper.popI(),

   933                                    ">=", topMostLabel);

   934                     break;

   935                 case opc_goto: {

   936                     int indx = i + readShortArg(byteCodes, i);

   937                     goTo(out, i, indx, topMostLabel);

   938                     i += 2;

   939                     break;

   940                 }

   941                 case opc_lookupswitch: {

   942                     i = generateLookupSwitch(i, byteCodes, smapper, topMostLabel);

   943                     break;

   944                 }

   945                 case opc_tableswitch: {

   946                     i = generateTableSwitch(i, byteCodes, smapper, topMostLabel);

   947                     break;

   948                 }

   949                 case opc_invokeinterface: {

   950                     i = invokeVirtualMethod(byteCodes, i, smapper) + 2;

   951                     break;

   952                 }

   953                 case opc_invokevirtual:

   954                     i = invokeVirtualMethod(byteCodes, i, smapper);

   955                     break;

   956                 case opc_invokespecial:

   957                     i = invokeStaticMethod(byteCodes, i, smapper, false);

   958                     break;

   959                 case opc_invokestatic:

   960                     i = invokeStaticMethod(byteCodes, i, smapper, true);

   961                     break;

   962                 case opc_new: {

   963                     int indx = readUShortArg(byteCodes, i);

   964                     String ci = jc.getClassName(indx);

   965                     emit(out, "var @1 = new @2;",

   966                          smapper.pushA(), accessClass(ci.replace('/', '_')));

   967                     addReference(ci);

   968                     i += 2;

   969                     break;

   970                 }

   971                 case opc_newarray:

   972                     int atype = readUByte(byteCodes, ++i);

   973                     generateNewArray(atype, smapper);

   974                     break;

   975                 case opc_anewarray: {

   976                     int type = readUShortArg(byteCodes, i);

   977                     i += 2;

   978                     generateANewArray(type, smapper);

   979                     break;

   980                 }

   981                 case opc_multianewarray: {

   982                     int type = readUShortArg(byteCodes, i);

   983                     i += 2;

   984                     i = generateMultiANewArray(type, byteCodes, i, smapper);

   985                     break;

   986                 }

   987                 case opc_arraylength:

   988                     emit(out, "var @2 = @1.length;",

   989                          smapper.popA(), smapper.pushI());

   990                     break;

   991                 case opc_lastore:

   992                     emit(out, "@3.at(@2, @1);",

   993                          smapper.popL(), smapper.popI(), smapper.popA());

   994                     break;

   995                 case opc_fastore:

   996                     emit(out, "@3.at(@2, @1);",

   997                          smapper.popF(), smapper.popI(), smapper.popA());

   998                     break;

   999                 case opc_dastore:

  1000                     emit(out, "@3.at(@2, @1);",

  1001                          smapper.popD(), smapper.popI(), smapper.popA());

  1002                     break;

  1003                 case opc_aastore:

  1004                     emit(out, "@3.at(@2, @1);",

  1005                          smapper.popA(), smapper.popI(), smapper.popA());

  1006                     break;

  1007                 case opc_iastore:

  1008                 case opc_bastore:

  1009                 case opc_castore:

  1010                 case opc_sastore:

  1011                     emit(out, "@3.at(@2, @1);",

  1012                          smapper.popI(), smapper.popI(), smapper.popA());

  1013                     break;

  1014                 case opc_laload:

  1015                     emit(out, "var @3 = @2.at(@1);",

  1016                          smapper.popI(), smapper.popA(), smapper.pushL());

  1017                     break;

  1018                 case opc_faload:

  1019                     emit(out, "var @3 = @2.at(@1);",

  1020                          smapper.popI(), smapper.popA(), smapper.pushF());

  1021                     break;

  1022                 case opc_daload:

  1023                     emit(out, "var @3 = @2.at(@1);",

  1024                          smapper.popI(), smapper.popA(), smapper.pushD());

  1025                     break;

  1026                 case opc_aaload:

  1027                     emit(out, "var @3 = @2.at(@1);",

  1028                          smapper.popI(), smapper.popA(), smapper.pushA());

  1029                     break;

  1030                 case opc_iaload:

  1031                 case opc_baload:

  1032                 case opc_caload:

  1033                 case opc_saload:

  1034                     emit(out, "var @3 = @2.at(@1);",

  1035                          smapper.popI(), smapper.popA(), smapper.pushI());

  1036                     break;

  1037                 case opc_pop:

  1038                 case opc_pop2:

  1039                     smapper.pop(1);

  1040                     debug("/* pop */");

  1041                     break;

  1042                 case opc_dup: {

  1043                     final Variable v = smapper.get(0);

  1044                     emit(out, "var @1 = @2;", smapper.pushT(v.getType()), v);

  1045                     break;

  1046                 }

  1047                 case opc_dup2: {

  1048                     final Variable vi1 = smapper.get(0);

  1050                     if (vi1.isCategory2()) {

  1051                         emit(out, "var @1 = @2;",

  1052                              smapper.pushT(vi1.getType()), vi1);

  1053                     } else {

  1054                         final Variable vi2 = smapper.get(1);

  1055                         emit(out, "var @1 = @2, @3 = @4;",

  1056                              smapper.pushT(vi2.getType()), vi2,

  1057                              smapper.pushT(vi1.getType()), vi1);

  1058                     }

  1059                     break;

  1060                 }

  1061                 case opc_dup_x1: {

  1062                     final Variable vi1 = smapper.pop();

  1063                     final Variable vi2 = smapper.pop();

  1064                     final Variable vo3 = smapper.pushT(vi1.getType());

  1065                     final Variable vo2 = smapper.pushT(vi2.getType());

  1066                     final Variable vo1 = smapper.pushT(vi1.getType());

  1068                     emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1069                          vo1, vi1, vo2, vi2, vo3, vo1);

  1070                     break;

  1071                 }

  1072                 case opc_dup2_x1: {

  1073                     final Variable vi1 = smapper.pop();

  1074                     final Variable vi2 = smapper.pop();

  1076                     if (vi1.isCategory2()) {

  1077                         final Variable vo3 = smapper.pushT(vi1.getType());

  1078                         final Variable vo2 = smapper.pushT(vi2.getType());

  1079                         final Variable vo1 = smapper.pushT(vi1.getType());

  1081                         emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1082                              vo1, vi1, vo2, vi2, vo3, vo1);

  1083                     } else {

  1084                         final Variable vi3 = smapper.pop();

  1085                         final Variable vo5 = smapper.pushT(vi2.getType());

  1086                         final Variable vo4 = smapper.pushT(vi1.getType());

  1087                         final Variable vo3 = smapper.pushT(vi3.getType());

  1088                         final Variable vo2 = smapper.pushT(vi2.getType());

  1089                         final Variable vo1 = smapper.pushT(vi1.getType());

  1091                         emit(out, "var @1 = @2, @3 = @4, @5 = @6,",

  1092                              vo1, vi1, vo2, vi2, vo3, vi3);

  1093                         emit(out, " @1 = @2, @3 = @4;",

  1094                              vo4, vo1, vo5, vo2);

  1095                     }

  1096                     break;

  1097                 }

  1098                 case opc_dup_x2: {

  1099                     final Variable vi1 = smapper.pop();

  1100                     final Variable vi2 = smapper.pop();

  1102                     if (vi2.isCategory2()) {

  1103                         final Variable vo3 = smapper.pushT(vi1.getType());

  1104                         final Variable vo2 = smapper.pushT(vi2.getType());

  1105                         final Variable vo1 = smapper.pushT(vi1.getType());

  1107                         emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1108                              vo1, vi1, vo2, vi2, vo3, vo1);

  1109                     } else {

  1110                         final Variable vi3 = smapper.pop();

  1111                         final Variable vo4 = smapper.pushT(vi1.getType());

  1112                         final Variable vo3 = smapper.pushT(vi3.getType());

  1113                         final Variable vo2 = smapper.pushT(vi2.getType());

  1114                         final Variable vo1 = smapper.pushT(vi1.getType());

  1116                         emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1117                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1118                     }

  1119                     break;

  1120                 }

  1121                 case opc_dup2_x2: {

  1122                     final Variable vi1 = smapper.pop();

  1123                     final Variable vi2 = smapper.pop();

  1125                     if (vi1.isCategory2()) {

  1126                         if (vi2.isCategory2()) {

  1127                             final Variable vo3 = smapper.pushT(vi1.getType());

  1128                             final Variable vo2 = smapper.pushT(vi2.getType());

  1129                             final Variable vo1 = smapper.pushT(vi1.getType());

  1131                             emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1132                                  vo1, vi1, vo2, vi2, vo3, vo1);

  1133                         } else {

  1134                             final Variable vi3 = smapper.pop();

  1135                             final Variable vo4 = smapper.pushT(vi1.getType());

  1136                             final Variable vo3 = smapper.pushT(vi3.getType());

  1137                             final Variable vo2 = smapper.pushT(vi2.getType());

  1138                             final Variable vo1 = smapper.pushT(vi1.getType());

  1140                             emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1141                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1142                         }

  1143                     } else {

  1144                         final Variable vi3 = smapper.pop();

  1146                         if (vi3.isCategory2()) {

  1147                             final Variable vo5 = smapper.pushT(vi2.getType());

  1148                             final Variable vo4 = smapper.pushT(vi1.getType());

  1149                             final Variable vo3 = smapper.pushT(vi3.getType());

  1150                             final Variable vo2 = smapper.pushT(vi2.getType());

  1151                             final Variable vo1 = smapper.pushT(vi1.getType());

  1153                             emit(out, "var @1 = @2, @3 = @4, @5 = @6,",

  1154                                  vo1, vi1, vo2, vi2, vo3, vi3);

  1155                             emit(out, " @1 = @2, @3 = @4;",

  1156                                  vo4, vo1, vo5, vo2);

  1157                         } else {

  1158                             final Variable vi4 = smapper.pop();

  1159                             final Variable vo6 = smapper.pushT(vi2.getType());

  1160                             final Variable vo5 = smapper.pushT(vi1.getType());

  1161                             final Variable vo4 = smapper.pushT(vi4.getType());

  1162                             final Variable vo3 = smapper.pushT(vi3.getType());

  1163                             final Variable vo2 = smapper.pushT(vi2.getType());

  1164                             final Variable vo1 = smapper.pushT(vi1.getType());

  1166                             emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8,",

  1167                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vi4);

  1168                             emit(out, " @1 = @2, @3 = @4;",

  1169                                  vo5, vo1, vo6, vo2);

  1170                         }

  1171                     }

  1172                     break;

  1173                 }

  1174                 case opc_swap: {

  1175                     final Variable vi1 = smapper.get(0);

  1176                     final Variable vi2 = smapper.get(1);

  1178                     if (vi1.getType() == vi2.getType()) {

  1179                         final Variable tmp = smapper.pushT(vi1.getType());

  1181                         emit(out, "var @1 = @2, @2 = @3, @3 = @1;",

  1182                              tmp, vi1, vi2);

  1183                         smapper.pop(1);

  1184                     } else {

  1185                         smapper.pop(2);

  1186                         smapper.pushT(vi1.getType());

  1187                         smapper.pushT(vi2.getType());

  1188                     }

  1189                     break;

  1190                 }

  1191                 case opc_bipush:

  1192                     emit(out, "var @1 = @2;",

  1193                          smapper.pushI(), Integer.toString(byteCodes[++i]));

  1194                     break;

  1195                 case opc_sipush:

  1196                     emit(out, "var @1 = @2;",

  1197                          smapper.pushI(),

  1198                          Integer.toString(readShortArg(byteCodes, i)));

  1199                     i += 2;

  1200                     break;

  1201                 case opc_getfield: {

  1202                     int indx = readUShortArg(byteCodes, i);

  1203                     String[] fi = jc.getFieldInfoName(indx);

  1204                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1205                     final String mangleClass = mangleSig(fi[0]);

  1206                     final String mangleClassAccess = accessClass(mangleClass);

  1207                     emit(out, "var @2 = @3.call(@1);",

  1208                          smapper.popA(),

  1209                          smapper.pushT(type),

  1210                          accessMember(mangleClassAccess + "(false)",

  1211                                       "_" + fi[1], fi));

  1212                     i += 2;

  1213                     break;

  1214                 }

  1215                 case opc_putfield: {

  1216                     int indx = readUShortArg(byteCodes, i);

  1217                     String[] fi = jc.getFieldInfoName(indx);

  1218                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1219                     final String mangleClass = mangleSig(fi[0]);

  1220                     final String mangleClassAccess = accessClass(mangleClass);

  1221                     emit(out, "@3.call(@2, @1);",

  1222                          smapper.popT(type),

  1223                          smapper.popA(),

  1224                          accessMember(mangleClassAccess + "(false)",

  1225                                       "_" + fi[1], fi));

  1226                     i += 2;

  1227                     break;

  1228                 }

  1229                 case opc_getstatic: {

  1230                     int indx = readUShortArg(byteCodes, i);

  1231                     String[] fi = jc.getFieldInfoName(indx);

  1232                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1233                     emit(out, "var @1 = @2();",

  1234                          smapper.pushT(type),

  1235                          accessMember(accessClass(fi[0].replace('/', '_'))

  1236                                           + "(false)",

  1237                                       "_" + fi[1], fi));

  1238                     i += 2;

  1239                     addReference(fi[0]);

  1240                     break;

  1241                 }

  1242                 case opc_putstatic: {

  1243                     int indx = readUShortArg(byteCodes, i);

  1244                     String[] fi = jc.getFieldInfoName(indx);

  1245                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1246                     emit(out, "@1(@2);",

  1247                          accessMember(accessClass(fi[0].replace('/', '_'))

  1248                                           + "(false)",

  1249                                       "_" + fi[1], fi),

  1250                          smapper.popT(type));

  1251                     i += 2;

  1252                     addReference(fi[0]);

  1253                     break;

  1254                 }

  1255                 case opc_checkcast: {

  1256                     int indx = readUShortArg(byteCodes, i);

  1257                     generateCheckcast(indx, smapper);

  1258                     i += 2;

  1259                     break;

  1260                 }

  1261                 case opc_instanceof: {

  1262                     int indx = readUShortArg(byteCodes, i);

  1263                     generateInstanceOf(indx, smapper);

  1264                     i += 2;

  1265                     break;

  1266                 }

  1267                 case opc_athrow: {

  1268                     final Variable v = smapper.popA();

  1269                     smapper.clear();

  1271                     emit(out, "{ var @1 = @2; throw @2; }",

  1272                          smapper.pushA(), v);

  1273                     break;

  1274                 }

  1276                 case opc_monitorenter: {

  1277                     out.append("/* monitor enter */");

  1278                     smapper.popA();

  1279                     break;

  1280                 }

  1282                 case opc_monitorexit: {

  1283                     out.append("/* monitor exit */");

  1284                     smapper.popA();

  1285                     break;

  1286                 }

  1288                 case opc_wide:

  1289                     wide = true;

  1290                     break;

  1292                 default: {

  1293                     wide = false;

  1294                     emit(out, "throw 'unknown bytecode @1';",

  1295                          Integer.toString(c));

  1296                 }

  1297             }

  1298             if (debug(" //")) {

  1299                 generateByteCodeComment(prev, i, byteCodes);

  1300             }

  1301             out.append("\n");

  1302         }

  1303         if (previousTrap != null) {

  1304             generateCatch(previousTrap, byteCodes.length, topMostLabel);

  1305         }

  1306         out.append("\n    }\n");

  1307         while (openBraces-- > 0) {

  1308             out.append('}');

  1309         }

  1310         out.append("\n};");

  1311     }

  1313     private int generateIf(byte[] byteCodes, int i, final Variable v2, final Variable v1, final String test, int topMostLabel) throws IOException {

  1314         int indx = i + readShortArg(byteCodes, i);

  1315         out.append("if (").append(v1)

  1316            .append(' ').append(test).append(' ')

  1317            .append(v2).append(") ");

  1318         goTo(out, i, indx, topMostLabel);

  1319         return i + 2;

  1320     }

  1322     private int readInt4(byte[] byteCodes, int offset) {

  1323         final int d = byteCodes[offset + 0] << 24;

  1324         final int c = byteCodes[offset + 1] << 16;

  1325         final int b = byteCodes[offset + 2] << 8;

  1326         final int a = byteCodes[offset + 3];

  1327         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1328     }

  1329     private static int readUByte(byte[] byteCodes, int offset) {

  1330         return byteCodes[offset] & 0xff;

  1331     }

  1333     private static int readUShort(byte[] byteCodes, int offset) {

  1334         return ((byteCodes[offset] & 0xff) << 8)

  1335                     | (byteCodes[offset + 1] & 0xff);

  1336     }

  1337     private static int readUShortArg(byte[] byteCodes, int offsetInstruction) {

  1338         return readUShort(byteCodes, offsetInstruction + 1);

  1339     }

  1341     private static int readShort(byte[] byteCodes, int offset) {

  1342         int signed = byteCodes[offset];

  1343         byte b0 = (byte)signed;

  1344         return (b0 << 8) | (byteCodes[offset + 1] & 0xff);

  1345     }

  1346     private static int readShortArg(byte[] byteCodes, int offsetInstruction) {

  1347         return readShort(byteCodes, offsetInstruction + 1);

  1348     }

  1350     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1351         int i = 0;

  1352         Boolean count = null;

  1353         boolean array = false;

  1354         sig.append("__");

  1355         int firstPos = sig.length();

  1356         while (i < descriptor.length()) {

  1357             char ch = descriptor.charAt(i++);

  1358             switch (ch) {

  1359                 case '(':

  1360                     count = true;

  1361                     continue;

  1362                 case ')':

  1363                     count = false;

  1364                     continue;

  1365                 case 'B':

  1366                 case 'C':

  1367                 case 'D':

  1368                 case 'F':

  1369                 case 'I':

  1370                 case 'J':

  1371                 case 'S':

  1372                 case 'Z':

  1373                     if (count) {

  1374                         if (array) {

  1375                             sig.append("_3");

  1376                         }

  1377                         sig.append(ch);

  1378                         if (ch == 'J' || ch == 'D') {

  1379                             cnt.append('1');

  1380                         } else {

  1381                             cnt.append('0');

  1382                         }

  1383                     } else {

  1384                         sig.insert(firstPos, ch);

  1385                         if (array) {

  1386                             returnType[0] = '[';

  1387                             sig.insert(firstPos, "_3");

  1388                         } else {

  1389                             returnType[0] = ch;

  1390                         }

  1391                     }

  1392                     array = false;

  1393                     continue;

  1394                 case 'V':

  1395                     assert !count;

  1396                     returnType[0] = 'V';

  1397                     sig.insert(firstPos, 'V');

  1398                     continue;

  1399                 case 'L':

  1400                     int next = descriptor.indexOf(';', i);

  1401                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1402                     if (count) {

  1403                         if (array) {

  1404                             sig.append("_3");

  1405                         }

  1406                         sig.append(realSig);

  1407                         cnt.append('0');

  1408                     } else {

  1409                         sig.insert(firstPos, realSig);

  1410                         if (array) {

  1411                             sig.insert(firstPos, "_3");

  1412                         }

  1413                         returnType[0] = 'L';

  1414                     }

  1415                     i = next + 1;

  1416                     array = false;

  1417                     continue;

  1418                 case '[':

  1419                     array = true;

  1420                     continue;

  1421                 default:

  1422                     throw new IllegalStateException("Invalid char: " + ch);

  1423             }

  1424         }

  1425     }

  1427     static String mangleSig(String sig) {

  1428         return mangleSig(sig, 0, sig.length());

  1429     }

  1431     private static String mangleSig(String txt, int first, int last) {

  1432         StringBuilder sb = new StringBuilder();

  1433         for (int i = first; i < last; i++) {

  1434             final char ch = txt.charAt(i);

  1435             switch (ch) {

  1436                 case '/': sb.append('_'); break;

  1437                 case '_': sb.append("_1"); break;

  1438                 case ';': sb.append("_2"); break;

  1439                 case '[': sb.append("_3"); break;

  1440                 default: sb.append(ch); break;

  1441             }

  1442         }

  1443         return sb.toString();

  1444     }

  1446     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1447         StringBuilder name = new StringBuilder();

  1448         if ("<init>".equals(m.getName())) { // NOI18N

  1449             name.append("cons"); // NOI18N

  1450         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1451             name.append("class"); // NOI18N

  1452         } else {

  1453             name.append(m.getName());

  1454         }

  1456         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1457         return name.toString();

  1458     }

  1460     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1461         StringBuilder name = new StringBuilder();

  1462         String descr = mi[2];//mi.getDescriptor();

  1463         String nm= mi[1];

  1464         if ("<init>".equals(nm)) { // NOI18N

  1465             name.append("cons"); // NOI18N

  1466         } else {

  1467             name.append(nm);

  1468         }

  1469         countArgs(descr, returnType, name, cnt);

  1470         return name.toString();

  1471     }

  1473     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1474     throws IOException {

  1475         int methodIndex = readUShortArg(byteCodes, i);

  1476         String[] mi = jc.getFieldInfoName(methodIndex);

  1477         char[] returnType = { 'V' };

  1478         StringBuilder cnt = new StringBuilder();

  1479         String mn = findMethodName(mi, cnt, returnType);

  1481         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1482         final Variable[] vars = new Variable[numArguments];

  1484         for (int j = numArguments - 1; j >= 0; --j) {

  1485             vars[j] = mapper.pop();

  1486         }

  1488         if (returnType[0] != 'V') {

  1489             out.append("var ")

  1490                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1491                .append(" = ");

  1492         }

  1494         final String in = mi[0];

  1495         out.append(accessMember(

  1496                        accessClass(in.replace('/', '_')) + "(false)",

  1497                        mn.startsWith("cons_")

  1498                               ? "constructor." + mn

  1499                               : mn,

  1500                        mi));

  1501         if (isStatic) {

  1502             out.append('(');

  1503         } else {

  1504             out.append(".call(");

  1505         }

  1506         if (numArguments > 0) {

  1507             out.append(vars[0]);

  1508             for (int j = 1; j < numArguments; ++j) {

  1509                 out.append(", ");

  1510                 out.append(vars[j]);

  1511             }

  1512         }

  1513         out.append(");");

  1514         i += 2;

  1515         addReference(in);

  1516         return i;

  1517     }

  1518     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1519     throws IOException {

  1520         int methodIndex = readUShortArg(byteCodes, i);

  1521         String[] mi = jc.getFieldInfoName(methodIndex);

  1522         char[] returnType = { 'V' };

  1523         StringBuilder cnt = new StringBuilder();

  1524         String mn = findMethodName(mi, cnt, returnType);

  1526         final int numArguments = cnt.length() + 1;

  1527         final Variable[] vars = new Variable[numArguments];

  1529         for (int j = numArguments - 1; j >= 0; --j) {

  1530             vars[j] = mapper.pop();

  1531         }

  1533         if (returnType[0] != 'V') {

  1534             out.append("var ")

  1535                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1536                .append(" = ");

  1537         }

  1539         out.append(accessMember(vars[0].toString(), mn, mi));

  1540         out.append('(');

  1541         String sep = "";

  1542         for (int j = 1; j < numArguments; ++j) {

  1543             out.append(sep);

  1544             out.append(vars[j]);

  1545             sep = ", ";

  1546         }

  1547         out.append(");");

  1548         i += 2;

  1549         return i;

  1550     }

  1552     private void addReference(String cn) throws IOException {

  1553         if (requireReference(cn)) {

  1554             debug(" /* needs " + cn + " */");

  1555         }

  1556     }

  1558     private void outType(String d, StringBuilder out) {

  1559         int arr = 0;

  1560         while (d.charAt(0) == '[') {

  1561             out.append('A');

  1562             d = d.substring(1);

  1563         }

  1564         if (d.charAt(0) == 'L') {

  1565             assert d.charAt(d.length() - 1) == ';';

  1566             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1567         } else {

  1568             out.append(d);

  1569         }

  1570     }

  1572     private String encodeConstant(int entryIndex) throws IOException {

  1573         String[] classRef = { null };

  1574         String s = jc.stringValue(entryIndex, classRef);

  1575         if (classRef[0] != null) {

  1576             if (classRef[0].startsWith("[")) {

  1577                 s = accessClass("java_lang_Class") + "(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('" + classRef[0] + "');";

  1578             } else {

  1579                 addReference(classRef[0]);

  1580                 s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";

  1581             }

  1582         }

  1583         return s;

  1584     }

  1586     private String javaScriptBody(String destObject, MethodData m, boolean isStatic) throws IOException {

  1587         byte[] arr = m.findAnnotationData(true);

  1588         if (arr == null) {

  1589             return null;

  1590         }

  1591         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1592         class P extends AnnotationParser {

  1593             public P() {

  1594                 super(false, true);

  1595             }

  1597             int cnt;

  1598             String[] args = new String[30];

  1599             String body;

  1601             @Override

  1602             protected void visitAttr(String type, String attr, String at, String value) {

  1603                 if (type.equals(jvmType)) {

  1604                     if ("body".equals(attr)) {

  1605                         body = value;

  1606                     } else if ("args".equals(attr)) {

  1607                         args[cnt++] = value;

  1608                     } else {

  1609                         throw new IllegalArgumentException(attr);

  1610                     }

  1611                 }

  1612             }

  1613         }

  1614         P p = new P();

  1615         p.parse(arr, jc);

  1616         if (p.body == null) {

  1617             return null;

  1618         }

  1619         StringBuilder cnt = new StringBuilder();

  1620         final String mn = findMethodName(m, cnt);

  1621         out.append(destObject).append(".").append(mn);

  1622         out.append(" = function(");

  1623         String space = "";

  1624         int index = 0;

  1625         for (int i = 0; i < cnt.length(); i++) {

  1626             out.append(space);

  1627             space = outputArg(out, p.args, index);

  1628             index++;

  1629         }

  1630         out.append(") {").append("\n");

  1631         out.append(p.body);

  1632         out.append("\n}\n");

  1633         return mn;

  1634     }

  1635     private static String className(ClassData jc) {

  1636         //return jc.getName().getInternalName().replace('/', '_');

  1637         return jc.getClassName().replace('/', '_');

  1638     }

  1640     private static String[] findAnnotation(

  1641         byte[] arr, ClassData cd, final String className,

  1642         final String... attrNames

  1643     ) throws IOException {

  1644         if (arr == null) {

  1645             return null;

  1646         }

  1647         final String[] values = new String[attrNames.length];

  1648         final boolean[] found = { false };

  1649         final String jvmType = "L" + className.replace('.', '/') + ";";

  1650         AnnotationParser ap = new AnnotationParser(false, true) {

  1651             @Override

  1652             protected void visitAttr(String type, String attr, String at, String value) {

  1653                 if (type.equals(jvmType)) {

  1654                     found[0] = true;

  1655                     for (int i = 0; i < attrNames.length; i++) {

  1656                         if (attrNames[i].equals(attr)) {

  1657                             values[i] = value;

  1658                         }

  1659                     }

  1660                 }

  1661             }

  1663         };

  1664         ap.parse(arr, cd);

  1665         return found[0] ? values : null;

  1666     }

  1668     private CharSequence initField(FieldData v) {

  1669         final String is = v.getInternalSig();

  1670         if (is.length() == 1) {

  1671             switch (is.charAt(0)) {

  1672                 case 'S':

  1673                 case 'J':

  1674                 case 'B':

  1675                 case 'Z':

  1676                 case 'C':

  1677                 case 'I': return " = 0;";

  1678                 case 'F':

  1679                 case 'D': return " = 0.0;";

  1680                 default:

  1681                     throw new IllegalStateException(is);

  1682             }

  1683         }

  1684         return " = null;";

  1685     }

  1687     private void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1688         AnnotationParser ap = new AnnotationParser(true, false) {

  1689             int[] cnt = new int[32];

  1690             int depth;

  1692             @Override

  1693             protected void visitAnnotationStart(String attrType, boolean top) throws IOException {

  1694                 final String slashType = attrType.substring(1, attrType.length() - 1);

  1695                 requireReference(slashType);

  1697                 if (cnt[depth]++ > 0) {

  1698                     out.append(",");

  1699                 }

  1700                 if (top) {

  1701                     out.append('"').append(attrType).append("\" : ");

  1702                 }

  1703                 out.append("{\n");

  1704                 cnt[++depth] = 0;

  1705             }

  1707             @Override

  1708             protected void visitAnnotationEnd(String type, boolean top) throws IOException {

  1709                 out.append("\n}\n");

  1710                 depth--;

  1711             }

  1713             @Override

  1714             protected void visitValueStart(String attrName, char type) throws IOException {

  1715                 if (cnt[depth]++ > 0) {

  1716                     out.append(",\n");

  1717                 }

  1718                 cnt[++depth] = 0;

  1719                 if (attrName != null) {

  1720                     out.append(attrName).append(" : ");

  1721                 }

  1722                 if (type == '[') {

  1723                     out.append("[");

  1724                 }

  1725             }

  1727             @Override

  1728             protected void visitValueEnd(String attrName, char type) throws IOException {

  1729                 if (type == '[') {

  1730                     out.append("]");

  1731                 }

  1732                 depth--;

  1733             }

  1735             @Override

  1736             protected void visitAttr(String type, String attr, String attrType, String value)

  1737             throws IOException {

  1738                 if (attr == null && value == null) {

  1739                     return;

  1740                 }

  1741                 out.append(value);

  1742             }

  1744             @Override

  1745             protected void visitEnumAttr(String type, String attr, String attrType, String value)

  1746             throws IOException {

  1747                 final String slashType = attrType.substring(1, attrType.length() - 1);

  1748                 requireReference(slashType);

  1750                 out.append(accessClass(slashType.replace('/', '_')))

  1751                    .append("(false).constructor.").append(value);

  1752             }

  1753         };

  1754         ap.parse(data, cd);

  1755     }

  1757     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  1758         final String name = args[indx];

  1759         if (name == null) {

  1760             return "";

  1761         }

  1762         if (name.contains(",")) {

  1763             throw new IOException("Wrong parameter with ',': " + name);

  1764         }

  1765         out.append(name);

  1766         return ",";

  1767     }

  1769     private static void emit(final Appendable out,

  1770                              final String format,

  1771                              final CharSequence... params) throws IOException {

  1772         final int length = format.length();

  1774         int processed = 0;

  1775         int paramOffset = format.indexOf('@');

  1776         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  1777             final char paramChar = format.charAt(paramOffset + 1);

  1778             if ((paramChar >= '1') && (paramChar <= '9')) {

  1779                 final int paramIndex = paramChar - '0' - 1;

  1781                 out.append(format, processed, paramOffset);

  1782                 out.append(params[paramIndex]);

  1784                 ++paramOffset;

  1785                 processed = paramOffset + 1;

  1786             }

  1788             paramOffset = format.indexOf('@', paramOffset + 1);

  1789         }

  1791         out.append(format, processed, length);

  1792     }

  1794     private void generateCatch(TrapData[] traps, int current, int topMostLabel) throws IOException {

  1795         out.append("} catch (e) {\n");

  1796         int finallyPC = -1;

  1797         for (TrapData e : traps) {

  1798             if (e == null) {

  1799                 break;

  1800             }

  1801             if (e.catch_cpx != 0) { //not finally

  1802                 final String classInternalName = jc.getClassName(e.catch_cpx);

  1803                 addReference(classInternalName);

  1804                 if ("java/lang/Throwable".equals(classInternalName)) {

  1805                     out.append("if (e['$instOf_java_lang_Throwable']) {");

  1806                     out.append("  var stA0 = e;");

  1807                     out.append("} else {");

  1808                     out.append("  var stA0 = vm.java_lang_Throwable(true);");

  1809                     out.append("  vm.java_lang_Throwable.cons__VLjava_lang_String_2.call(stA0, e.toString());");

  1810                     out.append("}");

  1811                     goTo(out, current, e.handler_pc, topMostLabel);

  1812                 } else {

  1813                     out.append("if (e['$instOf_" + classInternalName.replace('/', '_') + "']) {");

  1814                     out.append("var stA0 = e;");

  1815                     goTo(out, current, e.handler_pc, topMostLabel);

  1816                     out.append("}\n");

  1817                 }

  1818             } else {

  1819                 finallyPC = e.handler_pc;

  1820             }

  1821         }

  1822         if (finallyPC == -1) {

  1823             out.append("throw e;");

  1824         } else {

  1825             out.append("var stA0 = e;");

  1826             goTo(out, current, finallyPC, topMostLabel);

  1827         }

  1828         out.append("\n}");

  1829     }

  1831     private static void goTo(Appendable out, int current, int to, int canBack) throws IOException {

  1832         if (to < current) {

  1833             if (canBack < to) {

  1834                 out.append("{ gt = 0; continue X_" + to + "; }");

  1835             } else {

  1836                 out.append("{ gt = " + to + "; continue X_0; }");

  1837             }

  1838         } else {

  1839             out.append("{ gt = " + to + "; break IF; }");

  1840         }

  1841     }

  1843     private static void emitIf(

  1844         Appendable out, String pattern, Variable param,

  1845         int current, int to, int canBack

  1846     ) throws IOException {

  1847         emit(out, pattern, param);

  1848         goTo(out, current, to, canBack);

  1849     }

  1851     private void generateNewArray(int atype, final StackMapper smapper) throws IOException, IllegalStateException {

  1852         String jvmType;

  1853         switch (atype) {

  1854             case 4: jvmType = "[Z"; break;

  1855             case 5: jvmType = "[C"; break;

  1856             case 6: jvmType = "[F"; break;

  1857             case 7: jvmType = "[D"; break;

  1858             case 8: jvmType = "[B"; break;

  1859             case 9: jvmType = "[S"; break;

  1860             case 10: jvmType = "[I"; break;

  1861             case 11: jvmType = "[J"; break;

  1862             default: throw new IllegalStateException("Array type: " + atype);

  1863         }

  1864         emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(true, '@3', @1);",

  1865              smapper.popI(), smapper.pushA(), jvmType);

  1866     }

  1868     private void generateANewArray(int type, final StackMapper smapper) throws IOException {

  1869         String typeName = jc.getClassName(type);

  1870         if (typeName.startsWith("[")) {

  1871             typeName = "[" + typeName;

  1872         } else {

  1873             typeName = "[L" + typeName + ";";

  1874         }

  1875         emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(false, '@3', @1);",

  1876              smapper.popI(), smapper.pushA(), typeName);

  1877     }

  1879     private int generateMultiANewArray(int type, final byte[] byteCodes, int i, final StackMapper smapper) throws IOException {

  1880         String typeName = jc.getClassName(type);

  1881         int dim = readUByte(byteCodes, ++i);

  1882         StringBuilder dims = new StringBuilder();

  1883         dims.append('[');

  1884         for (int d = 0; d < dim; d++) {

  1885             if (d != 0) {

  1886                 dims.insert(1, ",");

  1887             }

  1888             dims.insert(1, smapper.popI());

  1889         }

  1890         dims.append(']');

  1891         emit(out, "var @2 = Array.prototype.multiNewArray__Ljava_lang_Object_2Ljava_lang_String_2_3II('@3', @1, 0);",

  1892              dims.toString(), smapper.pushA(), typeName);

  1893         return i;

  1894     }

  1896     private int generateTableSwitch(int i, final byte[] byteCodes, final StackMapper smapper, int topMostLabel) throws IOException {

  1897         int table = i / 4 * 4 + 4;

  1898         int dflt = i + readInt4(byteCodes, table);

  1899         table += 4;

  1900         int low = readInt4(byteCodes, table);

  1901         table += 4;

  1902         int high = readInt4(byteCodes, table);

  1903         table += 4;

  1904         out.append("switch (").append(smapper.popI()).append(") {\n");

  1905         while (low <= high) {

  1906             int offset = i + readInt4(byteCodes, table);

  1907             table += 4;

  1908             out.append("  case " + low).append(":"); goTo(out, i, offset, topMostLabel); out.append('\n');

  1909             low++;

  1910         }

  1911         out.append("  default: ");

  1912         goTo(out, i, dflt, topMostLabel);

  1913         out.append("\n}");

  1914         i = table - 1;

  1915         return i;

  1916     }

  1918     private int generateLookupSwitch(int i, final byte[] byteCodes, final StackMapper smapper, int topMostLabel) throws IOException {

  1919         int table = i / 4 * 4 + 4;

  1920         int dflt = i + readInt4(byteCodes, table);

  1921         table += 4;

  1922         int n = readInt4(byteCodes, table);

  1923         table += 4;

  1924         out.append("switch (").append(smapper.popI()).append(") {\n");

  1925         while (n-- > 0) {

  1926             int cnstnt = readInt4(byteCodes, table);

  1927             table += 4;

  1928             int offset = i + readInt4(byteCodes, table);

  1929             table += 4;

  1930             out.append("  case " + cnstnt).append(": "); goTo(out, i, offset, topMostLabel); out.append('\n');

  1931         }

  1932         out.append("  default: ");

  1933         goTo(out, i, dflt, topMostLabel);

  1934         out.append("\n}");

  1935         i = table - 1;

  1936         return i;

  1937     }

  1939     private void generateInstanceOf(int indx, final StackMapper smapper) throws IOException {

  1940         final String type = jc.getClassName(indx);

  1941         if (!type.startsWith("[")) {

  1942             emit(out, "var @2 = @1 != null && @1['$instOf_@3'] ? 1 : 0;",

  1943                  smapper.popA(), smapper.pushI(),

  1944                  type.replace('/', '_'));

  1945         } else {

  1946             emit(out, "var @2 = vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@3').isInstance__ZLjava_lang_Object_2(@1);",

  1947                 smapper.popA(), smapper.pushI(),

  1948                 type

  1949             );

  1950         }

  1951     }

  1953     private void generateCheckcast(int indx, final StackMapper smapper) throws IOException {

  1954         final String type = jc.getClassName(indx);

  1955         if (!type.startsWith("[")) {

  1956             emit(out,

  1957                  "if (@1 !== null && !@1['$instOf_@2']) throw vm.java_lang_ClassCastException(true);",

  1958                  smapper.getA(0), type.replace('/', '_'));

  1959         } else {

  1960             emit(out, "vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@2').cast__Ljava_lang_Object_2Ljava_lang_Object_2(@1);",

  1961                  smapper.getA(0), type

  1962             );

  1963         }

  1964     }

  1966     private void generateByteCodeComment(int prev, int i, final byte[] byteCodes) throws IOException {

  1967         for (int j = prev; j <= i; j++) {

  1968             out.append(" ");

  1969             final int cc = readUByte(byteCodes, j);

  1970             out.append(Integer.toString(cc));

  1971         }

  1972     }

  1973 }

author	Lubomir Nerad <lubomir.nerad@oracle.com>
	Mon, 06 May 2013 18:06:08 +0200
branch	closure
changeset 1084	f5c9934a252c
parent 1083	9d6130cb464f
child 1085	6a4ef883e233
permissions	-rw-r--r--