hg/bck2brwsr: rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java@8c14a9f0c232

     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;

    31     final ObfuscationDelegate obfuscationDelegate;

    33     protected ByteCodeToJavaScript(Appendable out) {

    34         this(out, ObfuscationDelegate.NULL);

    35     }

    37     protected ByteCodeToJavaScript(

    38             Appendable out, ObfuscationDelegate obfuscationDelegate) {

    39         this.out = out;

    40         this.obfuscationDelegate = obfuscationDelegate;

    41     }

    43     /* Collects additional required resources.

    44      *

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

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

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

    48      */

    49     protected abstract boolean requireReference(String internalClassName);

    51     /*

    52      * @param resourcePath name of resources to read

    53      */

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

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

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

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

    59      *

    60      * @param className suggested name of the class

    61      */

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

    63         return className + " = ";

    64     }

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

    66         return classOperation;

    67     }

    69     abstract String getVMObject();

    71     /** Prints out a debug message.

    72      *

    73      * @param msg the message

    74      * @return true if the message has been printed

    75      * @throws IOException

    76      */

    77     boolean debug(String msg) throws IOException {

    78         out.append(msg);

    79         return true;

    80     }

    82     /**

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

    84      *

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

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

    87      *

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

    89      */

    91     public String compile(InputStream classFile) throws IOException {

    92         this.jc = new ClassData(classFile);

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

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

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

    96             );

    97         }

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

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

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

   101             "resource", "processByteCode"

   102         );

   103         if (arr != null) {

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

   105                 requireScript(arr[0]);

   106             }

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

   108                 return null;

   109             }

   110         }

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

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

   113             "container", "prototype"

   114         );

   115         StringArray toInitilize = new StringArray();

   116         final String className = className(jc);

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

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

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

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

   121         if (proto == null) {

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

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

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

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

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

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

   128         } else {

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

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

   131                 proto[0] = "p";

   132             }

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

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

   135         }

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

   137             if (v.isStatic()) {

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

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

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

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

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

   143             } else {

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

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

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

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

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

   149                    .append("; };");

   150             }

   152             obfuscationDelegate.exportField(out, "c", "_" + v.getName(), v);

   153         }

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

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

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

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

   158                 "name", "value"

   159             );

   160             if (only != null) {

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

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

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

   164                 }

   165                 continue;

   166             }

   167             String destObject;

   168             String mn;

   169             out.append("\n    ");

   170             if (m.isStatic()) {

   171                 destObject = "c";

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

   173             } else {

   174                 if (m.isConstructor()) {

   175                     destObject = "CLS";

   176                     mn = generateInstanceMethod(destObject, m);

   177                 } else {

   178                     destObject = "c";

   179                     mn = generateInstanceMethod(destObject, m);

   180                 }

   181             }

   182             obfuscationDelegate.exportMethod(out, destObject, mn, m);

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

   184             if (runAnno != null) {

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

   186                 generateAnno(jc, out, runAnno);

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

   188             }

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

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

   191         }

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

   193         String instOfName = "$instOf_" + className;

   194         out.append("\n    c.").append(instOfName).append(" = true;");

   195         obfuscationDelegate.exportJSProperty(out, "c", instOfName);

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

   197             instOfName = "$instOf_" + superInterface.replace('/', '_');

   198             out.append("\n    c.").append(instOfName).append(" = true;");

   199             obfuscationDelegate.exportJSProperty(out, "c", instOfName);

   200         }

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

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

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

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

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

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

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

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

   209         if (classAnno != null) {

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

   211             generateAnno(jc, out, classAnno);

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

   213         }

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

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

   216         }

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

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

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

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

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

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

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

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

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

   226                 "name", "value"

   227             );

   228             if (only != null) {

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

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

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

   232                 }

   233                 continue;

   234             }

   235             if (!v.isStatic()) {

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

   237                     append(className).append('_').

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

   239             }

   240         }

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

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

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

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

   246         obfuscationDelegate.exportClass(out, getVMObject(), className, jc);

   248 //        StringBuilder sb = new StringBuilder();

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

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

   251 //        }

   252         return "";

   253     }

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

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

   256         if (jsb != null) {

   257             return jsb;

   258         }

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

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

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

   262         }

   263         generateMethod(destObject, mn, m);

   264         return mn;

   265     }

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

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

   269         if (jsb != null) {

   270             return jsb;

   271         }

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

   273         generateMethod(destObject, mn, m);

   274         return mn;

   275     }

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

   278             throws IOException {

   279         final StackMapIterator stackMapIterator = m.createStackMapIterator();

   280         TrapDataIterator trap = m.getTrapDataIterator();

   281         final LocalsMapper lmapper =

   282                 new LocalsMapper(stackMapIterator.getArguments());

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

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

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

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

   289         if (byteCodes == null) {

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

   291                .append(jc.getClassName()).append('.')

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

   293             out.append("};");

   294             return;

   295         }

   297         final StackMapper smapper = new StackMapper();

   299         if (!m.isStatic()) {

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

   301         }

   303         int lastStackFrame = -1;

   304         TrapData[] previousTrap = null;

   305         boolean wide = false;

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

   308         int openBraces = 0;

   309         int topMostLabel = 0;

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

   311             int prev = i;

   312             stackMapIterator.advanceTo(i);

   313             boolean changeInCatch = trap.advanceTo(i);

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

   315                 if (previousTrap != null) {

   316                     generateCatch(previousTrap, i, topMostLabel);

   317                     previousTrap = null;

   318                 }

   319             }

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

   321                 if (i != 0) {

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

   323                 }

   324                 if (openBraces > 64) {

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

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

   327                     }

   328                     openBraces = 1;

   329                     topMostLabel = i;

   330                 }

   332                 lastStackFrame = stackMapIterator.getFrameIndex();

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

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

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

   336                 openBraces++;

   337                 changeInCatch = true;

   338             } else {

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

   340             }

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

   342                 out.append("try {");

   343                 previousTrap = trap.current();

   344             }

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

   346             switch (c) {

   347                 case opc_aload_0:

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

   349                     break;

   350                 case opc_iload_0:

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

   352                     break;

   353                 case opc_lload_0:

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

   355                     break;

   356                 case opc_fload_0:

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

   358                     break;

   359                 case opc_dload_0:

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

   361                     break;

   362                 case opc_aload_1:

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

   364                     break;

   365                 case opc_iload_1:

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

   367                     break;

   368                 case opc_lload_1:

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

   370                     break;

   371                 case opc_fload_1:

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

   373                     break;

   374                 case opc_dload_1:

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

   376                     break;

   377                 case opc_aload_2:

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

   379                     break;

   380                 case opc_iload_2:

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

   382                     break;

   383                 case opc_lload_2:

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

   385                     break;

   386                 case opc_fload_2:

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

   388                     break;

   389                 case opc_dload_2:

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

   391                     break;

   392                 case opc_aload_3:

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

   394                     break;

   395                 case opc_iload_3:

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

   397                     break;

   398                 case opc_lload_3:

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

   400                     break;

   401                 case opc_fload_3:

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

   403                     break;

   404                 case opc_dload_3:

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

   406                     break;

   407                 case opc_iload: {

   408                     ++i;

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

   410                                           : readUByte(byteCodes, i);

   411                     wide = false;

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

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

   414                     break;

   415                 }

   416                 case opc_lload: {

   417                     ++i;

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

   419                                           : readUByte(byteCodes, i);

   420                     wide = false;

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

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

   423                     break;

   424                 }

   425                 case opc_fload: {

   426                     ++i;

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

   428                                           : readUByte(byteCodes, i);

   429                     wide = false;

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

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

   432                     break;

   433                 }

   434                 case opc_dload: {

   435                     ++i;

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

   437                                           : readUByte(byteCodes, i);

   438                     wide = false;

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

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

   441                     break;

   442                 }

   443                 case opc_aload: {

   444                     ++i;

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

   446                                           : readUByte(byteCodes, i);

   447                     wide = false;

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

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

   450                     break;

   451                 }

   452                 case opc_istore: {

   453                     ++i;

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

   455                                           : readUByte(byteCodes, i);

   456                     wide = false;

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

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

   459                     break;

   460                 }

   461                 case opc_lstore: {

   462                     ++i;

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

   464                                           : readUByte(byteCodes, i);

   465                     wide = false;

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

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

   468                     break;

   469                 }

   470                 case opc_fstore: {

   471                     ++i;

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

   473                                           : readUByte(byteCodes, i);

   474                     wide = false;

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

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

   477                     break;

   478                 }

   479                 case opc_dstore: {

   480                     ++i;

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

   482                                           : readUByte(byteCodes, i);

   483                     wide = false;

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

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

   486                     break;

   487                 }

   488                 case opc_astore: {

   489                     ++i;

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

   491                                           : readUByte(byteCodes, i);

   492                     wide = false;

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

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

   495                     break;

   496                 }

   497                 case opc_astore_0:

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

   499                     break;

   500                 case opc_istore_0:

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

   502                     break;

   503                 case opc_lstore_0:

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

   505                     break;

   506                 case opc_fstore_0:

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

   508                     break;

   509                 case opc_dstore_0:

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

   511                     break;

   512                 case opc_astore_1:

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

   514                     break;

   515                 case opc_istore_1:

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

   517                     break;

   518                 case opc_lstore_1:

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

   520                     break;

   521                 case opc_fstore_1:

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

   523                     break;

   524                 case opc_dstore_1:

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

   526                     break;

   527                 case opc_astore_2:

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

   529                     break;

   530                 case opc_istore_2:

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

   532                     break;

   533                 case opc_lstore_2:

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

   535                     break;

   536                 case opc_fstore_2:

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

   538                     break;

   539                 case opc_dstore_2:

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

   541                     break;

   542                 case opc_astore_3:

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

   544                     break;

   545                 case opc_istore_3:

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

   547                     break;

   548                 case opc_lstore_3:

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

   550                     break;

   551                 case opc_fstore_3:

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

   553                     break;

   554                 case opc_dstore_3:

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

   556                     break;

   557                 case opc_iadd:

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

   559                     break;

   560                 case opc_ladd:

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

   562                     break;

   563                 case opc_fadd:

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

   565                     break;

   566                 case opc_dadd:

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

   568                     break;

   569                 case opc_isub:

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

   571                     break;

   572                 case opc_lsub:

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

   574                     break;

   575                 case opc_fsub:

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

   577                     break;

   578                 case opc_dsub:

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

   580                     break;

   581                 case opc_imul:

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

   583                     break;

   584                 case opc_lmul:

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

   586                     break;

   587                 case opc_fmul:

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

   589                     break;

   590                 case opc_dmul:

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

   592                     break;

   593                 case opc_idiv:

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

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

   596                     break;

   597                 case opc_ldiv:

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

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

   600                     break;

   601                 case opc_fdiv:

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

   603                     break;

   604                 case opc_ddiv:

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

   606                     break;

   607                 case opc_irem:

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

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

   610                     break;

   611                 case opc_lrem:

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

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

   614                     break;

   615                 case opc_frem:

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

   617                     break;

   618                 case opc_drem:

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

   620                     break;

   621                 case opc_iand:

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

   623                     break;

   624                 case opc_land:

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

   626                     break;

   627                 case opc_ior:

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

   629                     break;

   630                 case opc_lor:

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

   632                     break;

   633                 case opc_ixor:

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

   635                     break;

   636                 case opc_lxor:

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

   638                     break;

   639                 case opc_ineg:

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

   641                     break;

   642                 case opc_lneg:

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

   644                     break;

   645                 case opc_fneg:

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

   647                     break;

   648                 case opc_dneg:

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

   650                     break;

   651                 case opc_ishl:

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

   653                     break;

   654                 case opc_lshl:

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

   656                     break;

   657                 case opc_ishr:

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

   659                     break;

   660                 case opc_lshr:

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

   662                     break;

   663                 case opc_iushr:

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

   665                     break;

   666                 case opc_lushr:

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

   668                     break;

   669                 case opc_iinc: {

   670                     ++i;

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

   672                                              : readUByte(byteCodes, i);

   673                     ++i;

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

   675                                             : byteCodes[i];

   676                     wide = false;

   677                     if (incrBy == 1) {

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

   679                     } else {

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

   681                              lmapper.getI(varIndx),

   682                              Integer.toString(incrBy));

   683                     }

   684                     break;

   685                 }

   686                 case opc_return:

   687                     emit(out, "return;");

   688                     break;

   689                 case opc_ireturn:

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

   691                     break;

   692                 case opc_lreturn:

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

   694                     break;

   695                 case opc_freturn:

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

   697                     break;

   698                 case opc_dreturn:

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

   700                     break;

   701                 case opc_areturn:

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

   703                     break;

   704                 case opc_i2l:

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

   706                     break;

   707                 case opc_i2f:

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

   709                     break;

   710                 case opc_i2d:

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

   712                     break;

   713                 case opc_l2i:

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

   715                     break;

   716                     // max int check?

   717                 case opc_l2f:

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

   719                     break;

   720                 case opc_l2d:

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

   722                     break;

   723                 case opc_f2d:

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

   725                     break;

   726                 case opc_d2f:

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

   728                     break;

   729                 case opc_f2i:

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

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

   732                     break;

   733                 case opc_f2l:

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

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

   736                     break;

   737                 case opc_d2i:

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

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

   740                     break;

   741                 case opc_d2l:

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

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

   744                     break;

   745                 case opc_i2b:

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

   747                     break;

   748                 case opc_i2c:

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

   750                     break;

   751                 case opc_i2s:

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

   753                     break;

   754                 case opc_aconst_null:

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

   756                     break;

   757                 case opc_iconst_m1:

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

   759                     break;

   760                 case opc_iconst_0:

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

   762                     break;

   763                 case opc_dconst_0:

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

   765                     break;

   766                 case opc_lconst_0:

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

   768                     break;

   769                 case opc_fconst_0:

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

   771                     break;

   772                 case opc_iconst_1:

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

   774                     break;

   775                 case opc_lconst_1:

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

   777                     break;

   778                 case opc_fconst_1:

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

   780                     break;

   781                 case opc_dconst_1:

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

   783                     break;

   784                 case opc_iconst_2:

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

   786                     break;

   787                 case opc_fconst_2:

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

   789                     break;

   790                 case opc_iconst_3:

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

   792                     break;

   793                 case opc_iconst_4:

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

   795                     break;

   796                 case opc_iconst_5:

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

   798                     break;

   799                 case opc_ldc: {

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

   801                     String v = encodeConstant(indx);

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

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

   804                     break;

   805                 }

   806                 case opc_ldc_w:

   807                 case opc_ldc2_w: {

   808                     int indx = readUShortArg(byteCodes, i);

   809                     i += 2;

   810                     String v = encodeConstant(indx);

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

   812                     if (type == VarType.LONG) {

   813                         final Long lv = new Long(v);

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

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

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

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

   818                     } else {

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

   820                     }

   821                     break;

   822                 }

   823                 case opc_lcmp:

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

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

   826                     break;

   827                 case opc_fcmpl:

   828                 case opc_fcmpg:

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

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

   831                     break;

   832                 case opc_dcmpl:

   833                 case opc_dcmpg:

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

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

   836                     break;

   837                 case opc_if_acmpeq:

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

   839                                    "===", topMostLabel);

   840                     break;

   841                 case opc_if_acmpne:

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

   843                                    "!==", topMostLabel);

   844                     break;

   845                 case opc_if_icmpeq:

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

   847                                    "==", topMostLabel);

   848                     break;

   849                 case opc_ifeq: {

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

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

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

   853                     i += 2;

   854                     break;

   855                 }

   856                 case opc_ifne: {

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

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

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

   860                     i += 2;

   861                     break;

   862                 }

   863                 case opc_iflt: {

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

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

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

   867                     i += 2;

   868                     break;

   869                 }

   870                 case opc_ifle: {

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

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

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

   874                     i += 2;

   875                     break;

   876                 }

   877                 case opc_ifgt: {

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

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

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

   881                     i += 2;

   882                     break;

   883                 }

   884                 case opc_ifge: {

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

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

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

   888                     i += 2;

   889                     break;

   890                 }

   891                 case opc_ifnonnull: {

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

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

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

   895                     i += 2;

   896                     break;

   897                 }

   898                 case opc_ifnull: {

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

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

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

   902                     i += 2;

   903                     break;

   904                 }

   905                 case opc_if_icmpne:

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

   907                                    "!=", topMostLabel);

   908                     break;

   909                 case opc_if_icmplt:

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

   911                                    "<", topMostLabel);

   912                     break;

   913                 case opc_if_icmple:

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

   915                                    "<=", topMostLabel);

   916                     break;

   917                 case opc_if_icmpgt:

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

   919                                    ">", topMostLabel);

   920                     break;

   921                 case opc_if_icmpge:

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

   923                                    ">=", topMostLabel);

   924                     break;

   925                 case opc_goto: {

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

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

   928                     i += 2;

   929                     break;

   930                 }

   931                 case opc_lookupswitch: {

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

   933                     break;

   934                 }

   935                 case opc_tableswitch: {

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

   937                     break;

   938                 }

   939                 case opc_invokeinterface: {

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

   941                     break;

   942                 }

   943                 case opc_invokevirtual:

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

   945                     break;

   946                 case opc_invokespecial:

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

   948                     break;

   949                 case opc_invokestatic:

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

   951                     break;

   952                 case opc_new: {

   953                     int indx = readUShortArg(byteCodes, i);

   954                     String ci = jc.getClassName(indx);

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

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

   957                     addReference(ci);

   958                     i += 2;

   959                     break;

   960                 }

   961                 case opc_newarray:

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

   963                     generateNewArray(atype, smapper);

   964                     break;

   965                 case opc_anewarray: {

   966                     int type = readUShortArg(byteCodes, i);

   967                     i += 2;

   968                     generateANewArray(type, smapper);

   969                     break;

   970                 }

   971                 case opc_multianewarray: {

   972                     int type = readUShortArg(byteCodes, i);

   973                     i += 2;

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

   975                     break;

   976                 }

   977                 case opc_arraylength:

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

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

   980                     break;

   981                 case opc_lastore:

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

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

   984                     break;

   985                 case opc_fastore:

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

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

   988                     break;

   989                 case opc_dastore:

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

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

   992                     break;

   993                 case opc_aastore:

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

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

   996                     break;

   997                 case opc_iastore:

   998                 case opc_bastore:

   999                 case opc_castore:

  1000                 case opc_sastore:

  1001                     emit(out, "@3.at(@2, @1);",

  1002                          smapper.popI(), smapper.popI(), smapper.popA());

  1003                     break;

  1004                 case opc_laload:

  1005                     emit(out, "var @3 = @2.at(@1);",

  1006                          smapper.popI(), smapper.popA(), smapper.pushL());

  1007                     break;

  1008                 case opc_faload:

  1009                     emit(out, "var @3 = @2.at(@1);",

  1010                          smapper.popI(), smapper.popA(), smapper.pushF());

  1011                     break;

  1012                 case opc_daload:

  1013                     emit(out, "var @3 = @2.at(@1);",

  1014                          smapper.popI(), smapper.popA(), smapper.pushD());

  1015                     break;

  1016                 case opc_aaload:

  1017                     emit(out, "var @3 = @2.at(@1);",

  1018                          smapper.popI(), smapper.popA(), smapper.pushA());

  1019                     break;

  1020                 case opc_iaload:

  1021                 case opc_baload:

  1022                 case opc_caload:

  1023                 case opc_saload:

  1024                     emit(out, "var @3 = @2.at(@1);",

  1025                          smapper.popI(), smapper.popA(), smapper.pushI());

  1026                     break;

  1027                 case opc_pop:

  1028                 case opc_pop2:

  1029                     smapper.pop(1);

  1030                     debug("/* pop */");

  1031                     break;

  1032                 case opc_dup: {

  1033                     final Variable v = smapper.get(0);

  1034                     emit(out, "var @1 = @2;", smapper.pushT(v.getType()), v);

  1035                     break;

  1036                 }

  1037                 case opc_dup2: {

  1038                     final Variable vi1 = smapper.get(0);

  1040                     if (vi1.isCategory2()) {

  1041                         emit(out, "var @1 = @2;",

  1042                              smapper.pushT(vi1.getType()), vi1);

  1043                     } else {

  1044                         final Variable vi2 = smapper.get(1);

  1045                         emit(out, "var @1 = @2, @3 = @4;",

  1046                              smapper.pushT(vi2.getType()), vi2,

  1047                              smapper.pushT(vi1.getType()), vi1);

  1048                     }

  1049                     break;

  1050                 }

  1051                 case opc_dup_x1: {

  1052                     final Variable vi1 = smapper.pop();

  1053                     final Variable vi2 = smapper.pop();

  1054                     final Variable vo3 = smapper.pushT(vi1.getType());

  1055                     final Variable vo2 = smapper.pushT(vi2.getType());

  1056                     final Variable vo1 = smapper.pushT(vi1.getType());

  1058                     emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1059                          vo1, vi1, vo2, vi2, vo3, vo1);

  1060                     break;

  1061                 }

  1062                 case opc_dup2_x1: {

  1063                     final Variable vi1 = smapper.pop();

  1064                     final Variable vi2 = smapper.pop();

  1066                     if (vi1.isCategory2()) {

  1067                         final Variable vo3 = smapper.pushT(vi1.getType());

  1068                         final Variable vo2 = smapper.pushT(vi2.getType());

  1069                         final Variable vo1 = smapper.pushT(vi1.getType());

  1071                         emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1072                              vo1, vi1, vo2, vi2, vo3, vo1);

  1073                     } else {

  1074                         final Variable vi3 = smapper.pop();

  1075                         final Variable vo5 = smapper.pushT(vi2.getType());

  1076                         final Variable vo4 = smapper.pushT(vi1.getType());

  1077                         final Variable vo3 = smapper.pushT(vi3.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, vi3);

  1083                         emit(out, " @1 = @2, @3 = @4;",

  1084                              vo4, vo1, vo5, vo2);

  1085                     }

  1086                     break;

  1087                 }

  1088                 case opc_dup_x2: {

  1089                     final Variable vi1 = smapper.pop();

  1090                     final Variable vi2 = smapper.pop();

  1092                     if (vi2.isCategory2()) {

  1093                         final Variable vo3 = smapper.pushT(vi1.getType());

  1094                         final Variable vo2 = smapper.pushT(vi2.getType());

  1095                         final Variable vo1 = smapper.pushT(vi1.getType());

  1097                         emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1098                              vo1, vi1, vo2, vi2, vo3, vo1);

  1099                     } else {

  1100                         final Variable vi3 = smapper.pop();

  1101                         final Variable vo4 = smapper.pushT(vi1.getType());

  1102                         final Variable vo3 = smapper.pushT(vi3.getType());

  1103                         final Variable vo2 = smapper.pushT(vi2.getType());

  1104                         final Variable vo1 = smapper.pushT(vi1.getType());

  1106                         emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1107                              vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1108                     }

  1109                     break;

  1110                 }

  1111                 case opc_dup2_x2: {

  1112                     final Variable vi1 = smapper.pop();

  1113                     final Variable vi2 = smapper.pop();

  1115                     if (vi1.isCategory2()) {

  1116                         if (vi2.isCategory2()) {

  1117                             final Variable vo3 = smapper.pushT(vi1.getType());

  1118                             final Variable vo2 = smapper.pushT(vi2.getType());

  1119                             final Variable vo1 = smapper.pushT(vi1.getType());

  1121                             emit(out, "var @1 = @2, @3 = @4, @5 = @6;",

  1122                                  vo1, vi1, vo2, vi2, vo3, vo1);

  1123                         } else {

  1124                             final Variable vi3 = smapper.pop();

  1125                             final Variable vo4 = smapper.pushT(vi1.getType());

  1126                             final Variable vo3 = smapper.pushT(vi3.getType());

  1127                             final Variable vo2 = smapper.pushT(vi2.getType());

  1128                             final Variable vo1 = smapper.pushT(vi1.getType());

  1130                             emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",

  1131                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);

  1132                         }

  1133                     } else {

  1134                         final Variable vi3 = smapper.pop();

  1136                         if (vi3.isCategory2()) {

  1137                             final Variable vo5 = smapper.pushT(vi2.getType());

  1138                             final Variable vo4 = smapper.pushT(vi1.getType());

  1139                             final Variable vo3 = smapper.pushT(vi3.getType());

  1140                             final Variable vo2 = smapper.pushT(vi2.getType());

  1141                             final Variable vo1 = smapper.pushT(vi1.getType());

  1143                             emit(out, "var @1 = @2, @3 = @4, @5 = @6,",

  1144                                  vo1, vi1, vo2, vi2, vo3, vi3);

  1145                             emit(out, " @1 = @2, @3 = @4;",

  1146                                  vo4, vo1, vo5, vo2);

  1147                         } else {

  1148                             final Variable vi4 = smapper.pop();

  1149                             final Variable vo6 = smapper.pushT(vi2.getType());

  1150                             final Variable vo5 = smapper.pushT(vi1.getType());

  1151                             final Variable vo4 = smapper.pushT(vi4.getType());

  1152                             final Variable vo3 = smapper.pushT(vi3.getType());

  1153                             final Variable vo2 = smapper.pushT(vi2.getType());

  1154                             final Variable vo1 = smapper.pushT(vi1.getType());

  1156                             emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8,",

  1157                                  vo1, vi1, vo2, vi2, vo3, vi3, vo4, vi4);

  1158                             emit(out, " @1 = @2, @3 = @4;",

  1159                                  vo5, vo1, vo6, vo2);

  1160                         }

  1161                     }

  1162                     break;

  1163                 }

  1164                 case opc_swap: {

  1165                     final Variable vi1 = smapper.get(0);

  1166                     final Variable vi2 = smapper.get(1);

  1168                     if (vi1.getType() == vi2.getType()) {

  1169                         final Variable tmp = smapper.pushT(vi1.getType());

  1171                         emit(out, "var @1 = @2, @2 = @3, @3 = @1;",

  1172                              tmp, vi1, vi2);

  1173                         smapper.pop(1);

  1174                     } else {

  1175                         smapper.pop(2);

  1176                         smapper.pushT(vi1.getType());

  1177                         smapper.pushT(vi2.getType());

  1178                     }

  1179                     break;

  1180                 }

  1181                 case opc_bipush:

  1182                     emit(out, "var @1 = @2;",

  1183                          smapper.pushI(), Integer.toString(byteCodes[++i]));

  1184                     break;

  1185                 case opc_sipush:

  1186                     emit(out, "var @1 = @2;",

  1187                          smapper.pushI(),

  1188                          Integer.toString(readShortArg(byteCodes, i)));

  1189                     i += 2;

  1190                     break;

  1191                 case opc_getfield: {

  1192                     int indx = readUShortArg(byteCodes, i);

  1193                     String[] fi = jc.getFieldInfoName(indx);

  1194                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1195                     final String mangleClass = mangleSig(fi[0]);

  1196                     final String mangleClassAccess = accessClass(mangleClass);

  1197                     emit(out, "var @2 = @4(false)._@3.call(@1);",

  1198                          smapper.popA(),

  1199                          smapper.pushT(type), fi[1], mangleClassAccess

  1200                     );

  1201                     i += 2;

  1202                     break;

  1203                 }

  1204                 case opc_putfield: {

  1205                     int indx = readUShortArg(byteCodes, i);

  1206                     String[] fi = jc.getFieldInfoName(indx);

  1207                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1208                     final String mangleClass = mangleSig(fi[0]);

  1209                     final String mangleClassAccess = accessClass(mangleClass);

  1210                     emit(out, "@4(false)._@3.call(@2, @1);",

  1211                          smapper.popT(type),

  1212                          smapper.popA(), fi[1],

  1213                          mangleClassAccess

  1214                     );

  1215                     i += 2;

  1216                     break;

  1217                 }

  1218                 case opc_getstatic: {

  1219                     int indx = readUShortArg(byteCodes, i);

  1220                     String[] fi = jc.getFieldInfoName(indx);

  1221                     final int type = VarType.fromFieldType(fi[2].charAt(0));

  1222                     emit(out, "var @1 = @2(false)._@3();",

  1223                          smapper.pushT(type),

  1224                          accessClass(fi[0].replace('/', '_')), fi[1]);

  1225                     i += 2;

  1226                     addReference(fi[0]);

  1227                     break;

  1228                 }

  1229                 case opc_putstatic: {

  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, "@1(false)._@2(@3);",

  1234                          accessClass(fi[0].replace('/', '_')), fi[1],

  1235                          smapper.popT(type));

  1236                     i += 2;

  1237                     addReference(fi[0]);

  1238                     break;

  1239                 }

  1240                 case opc_checkcast: {

  1241                     int indx = readUShortArg(byteCodes, i);

  1242                     generateCheckcast(indx, smapper);

  1243                     i += 2;

  1244                     break;

  1245                 }

  1246                 case opc_instanceof: {

  1247                     int indx = readUShortArg(byteCodes, i);

  1248                     generateInstanceOf(indx, smapper);

  1249                     i += 2;

  1250                     break;

  1251                 }

  1252                 case opc_athrow: {

  1253                     final Variable v = smapper.popA();

  1254                     smapper.clear();

  1256                     emit(out, "{ var @1 = @2; throw @2; }",

  1257                          smapper.pushA(), v);

  1258                     break;

  1259                 }

  1261                 case opc_monitorenter: {

  1262                     out.append("/* monitor enter */");

  1263                     smapper.popA();

  1264                     break;

  1265                 }

  1267                 case opc_monitorexit: {

  1268                     out.append("/* monitor exit */");

  1269                     smapper.popA();

  1270                     break;

  1271                 }

  1273                 case opc_wide:

  1274                     wide = true;

  1275                     break;

  1277                 default: {

  1278                     wide = false;

  1279                     emit(out, "throw 'unknown bytecode @1';",

  1280                          Integer.toString(c));

  1281                 }

  1282             }

  1283             if (debug(" //")) {

  1284                 generateByteCodeComment(prev, i, byteCodes);

  1285             }

  1286             out.append("\n");

  1287         }

  1288         if (previousTrap != null) {

  1289             generateCatch(previousTrap, byteCodes.length, topMostLabel);

  1290         }

  1291         out.append("\n    }\n");

  1292         while (openBraces-- > 0) {

  1293             out.append('}');

  1294         }

  1295         out.append("\n};");

  1296     }

  1298     private int generateIf(byte[] byteCodes, int i, final Variable v2, final Variable v1, final String test, int topMostLabel) throws IOException {

  1299         int indx = i + readShortArg(byteCodes, i);

  1300         out.append("if (").append(v1)

  1301            .append(' ').append(test).append(' ')

  1302            .append(v2).append(") ");

  1303         goTo(out, i, indx, topMostLabel);

  1304         return i + 2;

  1305     }

  1307     private int readInt4(byte[] byteCodes, int offset) {

  1308         final int d = byteCodes[offset + 0] << 24;

  1309         final int c = byteCodes[offset + 1] << 16;

  1310         final int b = byteCodes[offset + 2] << 8;

  1311         final int a = byteCodes[offset + 3];

  1312         return (d & 0xff000000) | (c & 0xff0000) | (b & 0xff00) | (a & 0xff);

  1313     }

  1314     private static int readUByte(byte[] byteCodes, int offset) {

  1315         return byteCodes[offset] & 0xff;

  1316     }

  1318     private static int readUShort(byte[] byteCodes, int offset) {

  1319         return ((byteCodes[offset] & 0xff) << 8)

  1320                     | (byteCodes[offset + 1] & 0xff);

  1321     }

  1322     private static int readUShortArg(byte[] byteCodes, int offsetInstruction) {

  1323         return readUShort(byteCodes, offsetInstruction + 1);

  1324     }

  1326     private static int readShort(byte[] byteCodes, int offset) {

  1327         int signed = byteCodes[offset];

  1328         byte b0 = (byte)signed;

  1329         return (b0 << 8) | (byteCodes[offset + 1] & 0xff);

  1330     }

  1331     private static int readShortArg(byte[] byteCodes, int offsetInstruction) {

  1332         return readShort(byteCodes, offsetInstruction + 1);

  1333     }

  1335     private static void countArgs(String descriptor, char[] returnType, StringBuilder sig, StringBuilder cnt) {

  1336         int i = 0;

  1337         Boolean count = null;

  1338         boolean array = false;

  1339         sig.append("__");

  1340         int firstPos = sig.length();

  1341         while (i < descriptor.length()) {

  1342             char ch = descriptor.charAt(i++);

  1343             switch (ch) {

  1344                 case '(':

  1345                     count = true;

  1346                     continue;

  1347                 case ')':

  1348                     count = false;

  1349                     continue;

  1350                 case 'B':

  1351                 case 'C':

  1352                 case 'D':

  1353                 case 'F':

  1354                 case 'I':

  1355                 case 'J':

  1356                 case 'S':

  1357                 case 'Z':

  1358                     if (count) {

  1359                         if (array) {

  1360                             sig.append("_3");

  1361                         }

  1362                         sig.append(ch);

  1363                         if (ch == 'J' || ch == 'D') {

  1364                             cnt.append('1');

  1365                         } else {

  1366                             cnt.append('0');

  1367                         }

  1368                     } else {

  1369                         sig.insert(firstPos, ch);

  1370                         if (array) {

  1371                             returnType[0] = '[';

  1372                             sig.insert(firstPos, "_3");

  1373                         } else {

  1374                             returnType[0] = ch;

  1375                         }

  1376                     }

  1377                     array = false;

  1378                     continue;

  1379                 case 'V':

  1380                     assert !count;

  1381                     returnType[0] = 'V';

  1382                     sig.insert(firstPos, 'V');

  1383                     continue;

  1384                 case 'L':

  1385                     int next = descriptor.indexOf(';', i);

  1386                     String realSig = mangleSig(descriptor, i - 1, next + 1);

  1387                     if (count) {

  1388                         if (array) {

  1389                             sig.append("_3");

  1390                         }

  1391                         sig.append(realSig);

  1392                         cnt.append('0');

  1393                     } else {

  1394                         sig.insert(firstPos, realSig);

  1395                         if (array) {

  1396                             sig.insert(firstPos, "_3");

  1397                         }

  1398                         returnType[0] = 'L';

  1399                     }

  1400                     i = next + 1;

  1401                     array = false;

  1402                     continue;

  1403                 case '[':

  1404                     array = true;

  1405                     continue;

  1406                 default:

  1407                     throw new IllegalStateException("Invalid char: " + ch);

  1408             }

  1409         }

  1410     }

  1412     static String mangleSig(String sig) {

  1413         return mangleSig(sig, 0, sig.length());

  1414     }

  1416     private static String mangleSig(String txt, int first, int last) {

  1417         StringBuilder sb = new StringBuilder();

  1418         for (int i = first; i < last; i++) {

  1419             final char ch = txt.charAt(i);

  1420             switch (ch) {

  1421                 case '/': sb.append('_'); break;

  1422                 case '_': sb.append("_1"); break;

  1423                 case ';': sb.append("_2"); break;

  1424                 case '[': sb.append("_3"); break;

  1425                 default: sb.append(ch); break;

  1426             }

  1427         }

  1428         return sb.toString();

  1429     }

  1431     private static String findMethodName(MethodData m, StringBuilder cnt) {

  1432         StringBuilder name = new StringBuilder();

  1433         if ("<init>".equals(m.getName())) { // NOI18N

  1434             name.append("cons"); // NOI18N

  1435         } else if ("<clinit>".equals(m.getName())) { // NOI18N

  1436             name.append("class"); // NOI18N

  1437         } else {

  1438             name.append(m.getName());

  1439         }

  1441         countArgs(m.getInternalSig(), new char[1], name, cnt);

  1442         return name.toString();

  1443     }

  1445     static String findMethodName(String[] mi, StringBuilder cnt, char[] returnType) {

  1446         StringBuilder name = new StringBuilder();

  1447         String descr = mi[2];//mi.getDescriptor();

  1448         String nm= mi[1];

  1449         if ("<init>".equals(nm)) { // NOI18N

  1450             name.append("cons"); // NOI18N

  1451         } else {

  1452             name.append(nm);

  1453         }

  1454         countArgs(descr, returnType, name, cnt);

  1455         return name.toString();

  1456     }

  1458     private int invokeStaticMethod(byte[] byteCodes, int i, final StackMapper mapper, boolean isStatic)

  1459     throws IOException {

  1460         int methodIndex = readUShortArg(byteCodes, i);

  1461         String[] mi = jc.getFieldInfoName(methodIndex);

  1462         char[] returnType = { 'V' };

  1463         StringBuilder cnt = new StringBuilder();

  1464         String mn = findMethodName(mi, cnt, returnType);

  1466         final int numArguments = isStatic ? cnt.length() : cnt.length() + 1;

  1467         final Variable[] vars = new Variable[numArguments];

  1469         for (int j = numArguments - 1; j >= 0; --j) {

  1470             vars[j] = mapper.pop();

  1471         }

  1473         if (returnType[0] != 'V') {

  1474             out.append("var ")

  1475                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1476                .append(" = ");

  1477         }

  1479         final String in = mi[0];

  1480         out.append(accessClass(in.replace('/', '_')));

  1481         out.append("(false).");

  1482         if (mn.startsWith("cons_")) {

  1483             out.append("constructor.");

  1484         }

  1485         out.append(mn);

  1486         if (isStatic) {

  1487             out.append('(');

  1488         } else {

  1489             out.append(".call(");

  1490         }

  1491         if (numArguments > 0) {

  1492             out.append(vars[0]);

  1493             for (int j = 1; j < numArguments; ++j) {

  1494                 out.append(", ");

  1495                 out.append(vars[j]);

  1496             }

  1497         }

  1498         out.append(");");

  1499         i += 2;

  1500         addReference(in);

  1501         return i;

  1502     }

  1503     private int invokeVirtualMethod(byte[] byteCodes, int i, final StackMapper mapper)

  1504     throws IOException {

  1505         int methodIndex = readUShortArg(byteCodes, i);

  1506         String[] mi = jc.getFieldInfoName(methodIndex);

  1507         char[] returnType = { 'V' };

  1508         StringBuilder cnt = new StringBuilder();

  1509         String mn = findMethodName(mi, cnt, returnType);

  1511         final int numArguments = cnt.length() + 1;

  1512         final Variable[] vars = new Variable[numArguments];

  1514         for (int j = numArguments - 1; j >= 0; --j) {

  1515             vars[j] = mapper.pop();

  1516         }

  1518         if (returnType[0] != 'V') {

  1519             out.append("var ")

  1520                .append(mapper.pushT(VarType.fromFieldType(returnType[0])))

  1521                .append(" = ");

  1522         }

  1524         out.append(vars[0]).append('.');

  1525         out.append(mn);

  1526         out.append('(');

  1527         String sep = "";

  1528         for (int j = 1; j < numArguments; ++j) {

  1529             out.append(sep);

  1530             out.append(vars[j]);

  1531             sep = ", ";

  1532         }

  1533         out.append(");");

  1534         i += 2;

  1535         return i;

  1536     }

  1538     private void addReference(String cn) throws IOException {

  1539         if (requireReference(cn)) {

  1540             debug(" /* needs " + cn + " */");

  1541         }

  1542     }

  1544     private void outType(String d, StringBuilder out) {

  1545         int arr = 0;

  1546         while (d.charAt(0) == '[') {

  1547             out.append('A');

  1548             d = d.substring(1);

  1549         }

  1550         if (d.charAt(0) == 'L') {

  1551             assert d.charAt(d.length() - 1) == ';';

  1552             out.append(d.replace('/', '_').substring(0, d.length() - 1));

  1553         } else {

  1554             out.append(d);

  1555         }

  1556     }

  1558     private String encodeConstant(int entryIndex) throws IOException {

  1559         String[] classRef = { null };

  1560         String s = jc.stringValue(entryIndex, classRef);

  1561         if (classRef[0] != null) {

  1562             if (classRef[0].startsWith("[")) {

  1563                 s = accessClass("java_lang_Class") + "(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('" + classRef[0] + "');";

  1564             } else {

  1565                 addReference(classRef[0]);

  1566                 s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";

  1567             }

  1568         }

  1569         return s;

  1570     }

  1572     private String javaScriptBody(String destObject, MethodData m, boolean isStatic) throws IOException {

  1573         byte[] arr = m.findAnnotationData(true);

  1574         if (arr == null) {

  1575             return null;

  1576         }

  1577         final String jvmType = "Lorg/apidesign/bck2brwsr/core/JavaScriptBody;";

  1578         class P extends AnnotationParser {

  1579             public P() {

  1580                 super(false, true);

  1581             }

  1583             int cnt;

  1584             String[] args = new String[30];

  1585             String body;

  1587             @Override

  1588             protected void visitAttr(String type, String attr, String at, String value) {

  1589                 if (type.equals(jvmType)) {

  1590                     if ("body".equals(attr)) {

  1591                         body = value;

  1592                     } else if ("args".equals(attr)) {

  1593                         args[cnt++] = value;

  1594                     } else {

  1595                         throw new IllegalArgumentException(attr);

  1596                     }

  1597                 }

  1598             }

  1599         }

  1600         P p = new P();

  1601         p.parse(arr, jc);

  1602         if (p.body == null) {

  1603             return null;

  1604         }

  1605         StringBuilder cnt = new StringBuilder();

  1606         final String mn = findMethodName(m, cnt);

  1607         out.append(destObject).append(".").append(mn);

  1608         out.append(" = function(");

  1609         String space = "";

  1610         int index = 0;

  1611         for (int i = 0; i < cnt.length(); i++) {

  1612             out.append(space);

  1613             space = outputArg(out, p.args, index);

  1614             index++;

  1615         }

  1616         out.append(") {").append("\n");

  1617         out.append(p.body);

  1618         out.append("\n}\n");

  1619         return mn;

  1620     }

  1621     private static String className(ClassData jc) {

  1622         //return jc.getName().getInternalName().replace('/', '_');

  1623         return jc.getClassName().replace('/', '_');

  1624     }

  1626     private static String[] findAnnotation(

  1627         byte[] arr, ClassData cd, final String className,

  1628         final String... attrNames

  1629     ) throws IOException {

  1630         if (arr == null) {

  1631             return null;

  1632         }

  1633         final String[] values = new String[attrNames.length];

  1634         final boolean[] found = { false };

  1635         final String jvmType = "L" + className.replace('.', '/') + ";";

  1636         AnnotationParser ap = new AnnotationParser(false, true) {

  1637             @Override

  1638             protected void visitAttr(String type, String attr, String at, String value) {

  1639                 if (type.equals(jvmType)) {

  1640                     found[0] = true;

  1641                     for (int i = 0; i < attrNames.length; i++) {

  1642                         if (attrNames[i].equals(attr)) {

  1643                             values[i] = value;

  1644                         }

  1645                     }

  1646                 }

  1647             }

  1649         };

  1650         ap.parse(arr, cd);

  1651         return found[0] ? values : null;

  1652     }

  1654     private CharSequence initField(FieldData v) {

  1655         final String is = v.getInternalSig();

  1656         if (is.length() == 1) {

  1657             switch (is.charAt(0)) {

  1658                 case 'S':

  1659                 case 'J':

  1660                 case 'B':

  1661                 case 'Z':

  1662                 case 'C':

  1663                 case 'I': return " = 0;";

  1664                 case 'F':

  1665                 case 'D': return " = 0.0;";

  1666                 default:

  1667                     throw new IllegalStateException(is);

  1668             }

  1669         }

  1670         return " = null;";

  1671     }

  1673     private void generateAnno(ClassData cd, final Appendable out, byte[] data) throws IOException {

  1674         AnnotationParser ap = new AnnotationParser(true, false) {

  1675             int[] cnt = new int[32];

  1676             int depth;

  1678             @Override

  1679             protected void visitAnnotationStart(String attrType, boolean top) throws IOException {

  1680                 final String slashType = attrType.substring(1, attrType.length() - 1);

  1681                 requireReference(slashType);

  1683                 if (cnt[depth]++ > 0) {

  1684                     out.append(",");

  1685                 }

  1686                 if (top) {

  1687                     out.append('"').append(attrType).append("\" : ");

  1688                 }

  1689                 out.append("{\n");

  1690                 cnt[++depth] = 0;

  1691             }

  1693             @Override

  1694             protected void visitAnnotationEnd(String type, boolean top) throws IOException {

  1695                 out.append("\n}\n");

  1696                 depth--;

  1697             }

  1699             @Override

  1700             protected void visitValueStart(String attrName, char type) throws IOException {

  1701                 if (cnt[depth]++ > 0) {

  1702                     out.append(",\n");

  1703                 }

  1704                 cnt[++depth] = 0;

  1705                 if (attrName != null) {

  1706                     out.append(attrName).append(" : ");

  1707                 }

  1708                 if (type == '[') {

  1709                     out.append("[");

  1710                 }

  1711             }

  1713             @Override

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

  1715                 if (type == '[') {

  1716                     out.append("]");

  1717                 }

  1718                 depth--;

  1719             }

  1721             @Override

  1722             protected void visitAttr(String type, String attr, String attrType, String value)

  1723             throws IOException {

  1724                 if (attr == null && value == null) {

  1725                     return;

  1726                 }

  1727                 out.append(value);

  1728             }

  1730             @Override

  1731             protected void visitEnumAttr(String type, String attr, String attrType, String value)

  1732             throws IOException {

  1733                 final String slashType = attrType.substring(1, attrType.length() - 1);

  1734                 requireReference(slashType);

  1736                 out.append(accessClass(slashType.replace('/', '_')))

  1737                    .append("(false).constructor.").append(value);

  1738             }

  1739         };

  1740         ap.parse(data, cd);

  1741     }

  1743     private static String outputArg(Appendable out, String[] args, int indx) throws IOException {

  1744         final String name = args[indx];

  1745         if (name == null) {

  1746             return "";

  1747         }

  1748         if (name.contains(",")) {

  1749             throw new IOException("Wrong parameter with ',': " + name);

  1750         }

  1751         out.append(name);

  1752         return ",";

  1753     }

  1755     private static void emit(final Appendable out,

  1756                              final String format,

  1757                              final CharSequence... params) throws IOException {

  1758         final int length = format.length();

  1760         int processed = 0;

  1761         int paramOffset = format.indexOf('@');

  1762         while ((paramOffset != -1) && (paramOffset < (length - 1))) {

  1763             final char paramChar = format.charAt(paramOffset + 1);

  1764             if ((paramChar >= '1') && (paramChar <= '9')) {

  1765                 final int paramIndex = paramChar - '0' - 1;

  1767                 out.append(format, processed, paramOffset);

  1768                 out.append(params[paramIndex]);

  1770                 ++paramOffset;

  1771                 processed = paramOffset + 1;

  1772             }

  1774             paramOffset = format.indexOf('@', paramOffset + 1);

  1775         }

  1777         out.append(format, processed, length);

  1778     }

  1780     private void generateCatch(TrapData[] traps, int current, int topMostLabel) throws IOException {

  1781         out.append("} catch (e) {\n");

  1782         int finallyPC = -1;

  1783         for (TrapData e : traps) {

  1784             if (e == null) {

  1785                 break;

  1786             }

  1787             if (e.catch_cpx != 0) { //not finally

  1788                 final String classInternalName = jc.getClassName(e.catch_cpx);

  1789                 addReference(classInternalName);

  1790                 if ("java/lang/Throwable".equals(classInternalName)) {

  1791                     out.append("if (e.$instOf_java_lang_Throwable) {");

  1792                     out.append("  var stA0 = e;");

  1793                     out.append("} else {");

  1794                     out.append("  var stA0 = vm.java_lang_Throwable(true);");

  1795                     out.append("  vm.java_lang_Throwable.cons__VLjava_lang_String_2.call(stA0, e.toString());");

  1796                     out.append("}");

  1797                     goTo(out, current, e.handler_pc, topMostLabel);

  1798                 } else {

  1799                     out.append("if (e.$instOf_" + classInternalName.replace('/', '_') + ") {");

  1800                     out.append("var stA0 = e;");

  1801                     goTo(out, current, e.handler_pc, topMostLabel);

  1802                     out.append("}\n");

  1803                 }

  1804             } else {

  1805                 finallyPC = e.handler_pc;

  1806             }

  1807         }

  1808         if (finallyPC == -1) {

  1809             out.append("throw e;");

  1810         } else {

  1811             out.append("var stA0 = e;");

  1812             goTo(out, current, finallyPC, topMostLabel);

  1813         }

  1814         out.append("\n}");

  1815     }

  1817     private static void goTo(Appendable out, int current, int to, int canBack) throws IOException {

  1818         if (to < current) {

  1819             if (canBack < to) {

  1820                 out.append("{ gt = 0; continue X_" + to + "; }");

  1821             } else {

  1822                 out.append("{ gt = " + to + "; continue X_0; }");

  1823             }

  1824         } else {

  1825             out.append("{ gt = " + to + "; break IF; }");

  1826         }

  1827     }

  1829     private static void emitIf(

  1830         Appendable out, String pattern, Variable param,

  1831         int current, int to, int canBack

  1832     ) throws IOException {

  1833         emit(out, pattern, param);

  1834         goTo(out, current, to, canBack);

  1835     }

  1837     private void generateNewArray(int atype, final StackMapper smapper) throws IOException, IllegalStateException {

  1838         String jvmType;

  1839         switch (atype) {

  1840             case 4: jvmType = "[Z"; break;

  1841             case 5: jvmType = "[C"; break;

  1842             case 6: jvmType = "[F"; break;

  1843             case 7: jvmType = "[D"; break;

  1844             case 8: jvmType = "[B"; break;

  1845             case 9: jvmType = "[S"; break;

  1846             case 10: jvmType = "[I"; break;

  1847             case 11: jvmType = "[J"; break;

  1848             default: throw new IllegalStateException("Array type: " + atype);

  1849         }

  1850         emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(true, '@3', @1);",

  1851              smapper.popI(), smapper.pushA(), jvmType);

  1852     }

  1854     private void generateANewArray(int type, final StackMapper smapper) throws IOException {

  1855         String typeName = jc.getClassName(type);

  1856         if (typeName.startsWith("[")) {

  1857             typeName = "[" + typeName;

  1858         } else {

  1859             typeName = "[L" + typeName + ";";

  1860         }

  1861         emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(false, '@3', @1);",

  1862              smapper.popI(), smapper.pushA(), typeName);

  1863     }

  1865     private int generateMultiANewArray(int type, final byte[] byteCodes, int i, final StackMapper smapper) throws IOException {

  1866         String typeName = jc.getClassName(type);

  1867         int dim = readUByte(byteCodes, ++i);

  1868         StringBuilder dims = new StringBuilder();

  1869         dims.append('[');

  1870         for (int d = 0; d < dim; d++) {

  1871             if (d != 0) {

  1872                 dims.insert(1, ",");

  1873             }

  1874             dims.insert(1, smapper.popI());

  1875         }

  1876         dims.append(']');

  1877         emit(out, "var @2 = Array.prototype.multiNewArray__Ljava_lang_Object_2Ljava_lang_String_2_3II('@3', @1, 0);",

  1878              dims.toString(), smapper.pushA(), typeName);

  1879         return i;

  1880     }

  1882     private int generateTableSwitch(int i, final byte[] byteCodes, final StackMapper smapper, int topMostLabel) throws IOException {

  1883         int table = i / 4 * 4 + 4;

  1884         int dflt = i + readInt4(byteCodes, table);

  1885         table += 4;

  1886         int low = readInt4(byteCodes, table);

  1887         table += 4;

  1888         int high = readInt4(byteCodes, table);

  1889         table += 4;

  1890         out.append("switch (").append(smapper.popI()).append(") {\n");

  1891         while (low <= high) {

  1892             int offset = i + readInt4(byteCodes, table);

  1893             table += 4;

  1894             out.append("  case " + low).append(":"); goTo(out, i, offset, topMostLabel); out.append('\n');

  1895             low++;

  1896         }

  1897         out.append("  default: ");

  1898         goTo(out, i, dflt, topMostLabel);

  1899         out.append("\n}");

  1900         i = table - 1;

  1901         return i;

  1902     }

  1904     private int generateLookupSwitch(int i, final byte[] byteCodes, final StackMapper smapper, int topMostLabel) throws IOException {

  1905         int table = i / 4 * 4 + 4;

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

  1907         table += 4;

  1908         int n = readInt4(byteCodes, table);

  1909         table += 4;

  1910         out.append("switch (").append(smapper.popI()).append(") {\n");

  1911         while (n-- > 0) {

  1912             int cnstnt = readInt4(byteCodes, table);

  1913             table += 4;

  1914             int offset = i + readInt4(byteCodes, table);

  1915             table += 4;

  1916             out.append("  case " + cnstnt).append(": "); goTo(out, i, offset, topMostLabel); out.append('\n');

  1917         }

  1918         out.append("  default: ");

  1919         goTo(out, i, dflt, topMostLabel);

  1920         out.append("\n}");

  1921         i = table - 1;

  1922         return i;

  1923     }

  1925     private void generateInstanceOf(int indx, final StackMapper smapper) throws IOException {

  1926         final String type = jc.getClassName(indx);

  1927         if (!type.startsWith("[")) {

  1928             emit(out, "var @2 = @1 != null && @1.$instOf_@3 ? 1 : 0;",

  1929                  smapper.popA(), smapper.pushI(),

  1930                  type.replace('/', '_'));

  1931         } else {

  1932             emit(out, "var @2 = vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@3').isInstance__ZLjava_lang_Object_2(@1);",

  1933                 smapper.popA(), smapper.pushI(),

  1934                 type

  1935             );

  1936         }

  1937     }

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

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

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

  1942             emit(out,

  1943                  "if (@1 !== null && !@1.$instOf_@2) throw {};",

  1944                  smapper.getA(0), type.replace('/', '_'));

  1945         } else {

  1946             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);",

  1947                  smapper.getA(0), type

  1948             );

  1949         }

  1950     }

  1952     private void generateByteCodeComment(int prev, int i, final byte[] byteCodes) throws IOException {

  1953         for (int j = prev; j <= i; j++) {

  1954             out.append(" ");

  1955             final int cc = readUByte(byteCodes, j);

  1956             out.append(Integer.toString(cc));

  1957         }

  1958     }

  1959 }

author	Jaroslav Tulach <jaroslav.tulach@apidesign.org>
	Mon, 25 Mar 2013 13:33:03 +0100
changeset 883	8c14a9f0c232
parent 864	8ece59d31fcf
parent 880	32eb44c74e1e
child 962	787578f33c21
permissions	-rw-r--r--