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Split the ModuleGenerator in WasmCodeBuilder and ModuleGenerator
This commit is contained in:
Volker Berlin
parent
a49288449d
commit
74e6c0db06
@ -0,0 +1,793 @@
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/*
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* Copyright 2018 Volker Berlin (i-net software)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package de.inetsoftware.jwebassembly.module;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import javax.annotation.Nonnegative;
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import javax.annotation.Nonnull;
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import de.inetsoftware.classparser.Code;
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import de.inetsoftware.classparser.CodeInputStream;
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import de.inetsoftware.classparser.ConstantPool;
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import de.inetsoftware.classparser.ConstantRef;
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import de.inetsoftware.jwebassembly.WasmException;
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/**
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* Convert Java Byte Code to a list of WasmInstruction.
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*
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* @author Volker Berlin
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*/
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class JavaMethodWasmCodeBuilder extends WasmCodeBuilder {
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private LocaleVariableManager localVariables = new LocaleVariableManager();
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private final List<WasmInstruction> instructions = new ArrayList<>();
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private BranchManger branchManager = new BranchManger( instructions );
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/**
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* {@inheritDoc}
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*/
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List<WasmInstruction> getInstructions() {
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return instructions;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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List<ValueType> getLocalTypes( int paramCount ) {
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return localVariables.getLocalTypes( paramCount );
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}
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/**
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* Build the wasm instructions
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*
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* @param code
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* the Java method code
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* @param hasReturn
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* true, if the method has a return value; false, if it is void
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* @throws WasmException
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* if some Java code can't converted
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*/
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void buildCode( @Nonnull Code code, boolean hasReturn ) {
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CodeInputStream byteCode = null;
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try {
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localVariables.reset();
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branchManager.reset( code.getExceptionTable() );
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byteCode = code.getByteCode();
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writeCode( byteCode, code.getConstantPool(), hasReturn );
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localVariables.calculate();
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} catch( Exception ioex ) {
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int lineNumber = byteCode == null ? -1 : byteCode.getLineNumber();
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throw WasmException.create( ioex, lineNumber );
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}
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}
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/**
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* Write the byte code of a method.
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*
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* @param byteCode
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* a stream of byte code
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* @param constantPool
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* the constant pool of the the current class
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* @param hasReturn
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* if the method has a return value
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* @throws WasmException
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* if some Java code can't converted
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*/
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private void writeCode( CodeInputStream byteCode, ConstantPool constantPool, boolean hasReturn ) throws WasmException {
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instructions.clear();
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boolean endWithReturn = false;
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try {
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while( byteCode.available() > 0 ) {
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WasmInstruction instr = null;
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int codePos = byteCode.getCodePosition();
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endWithReturn = false;
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int op = byteCode.readUnsignedByte();
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switch( op ) {
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case 0: // nop
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break;
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//TODO case 1: // aconst_null
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case 2: // iconst_m1
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case 3: // iconst_0
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case 4: // iconst_1
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case 5: // iconst_2
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case 6: // iconst_3
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case 7: // iconst_4
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case 8: // iconst_5
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instr = new WasmConstInstruction( Integer.valueOf( op - 3 ), ValueType.i32, codePos );
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break;
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case 9: // lconst_0
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case 10: // lconst_1
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instr = new WasmConstInstruction( Long.valueOf( op - 9 ), ValueType.i64, codePos );
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break;
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case 11: // fconst_0
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case 12: // fconst_1
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case 13: // fconst_2
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instr = new WasmConstInstruction( Float.valueOf( op - 11 ), ValueType.f32, codePos );
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break;
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case 14: // dconst_0
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case 15: // dconst_1
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instr = new WasmConstInstruction( Double.valueOf( op - 14 ), ValueType.f64, codePos );
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break;
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case 16: // bipush
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instr = new WasmConstInstruction( Integer.valueOf( byteCode.readByte() ), ValueType.i32, codePos );
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break;
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case 17: // sipush
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instr = new WasmConstInstruction( Integer.valueOf( byteCode.readShort() ), ValueType.i32, codePos );
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break;
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case 18: // ldc
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instr = new WasmConstInstruction( (Number)constantPool.get( byteCode.readUnsignedByte() ), codePos );
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break;
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case 19: // ldc_w
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case 20: // ldc2_w
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instr = new WasmConstInstruction( (Number)constantPool.get( byteCode.readUnsignedShort() ), codePos );
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break;
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case 21: // iload
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instr = loadStore( ValueType.i32, true, byteCode.readUnsignedByte(), codePos );
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break;
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case 22: // lload
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instr = loadStore( ValueType.i64, true, byteCode.readUnsignedByte(), codePos );
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break;
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case 23: // fload
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instr = loadStore( ValueType.f32, true, byteCode.readUnsignedByte(), codePos );
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break;
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case 24: // dload
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instr = loadStore( ValueType.f64, true, byteCode.readUnsignedByte(), codePos );
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break;
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//TODO case 25: // aload
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case 26: // iload_0
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case 27: // iload_1
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case 28: // iload_2
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case 29: // iload_3
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instr = loadStore( ValueType.i32, true, op - 26, codePos );
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break;
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case 30: // lload_0
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case 31: // lload_1
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case 32: // lload_2
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case 33: // lload_3
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instr = loadStore( ValueType.i64, true, op - 30, codePos );
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break;
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case 34: // fload_0
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case 35: // fload_1
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case 36: // fload_2
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case 37: // fload_3
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instr = loadStore( ValueType.f32, true, op - 34, codePos );
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break;
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case 38: // dload_0
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case 39: // dload_1
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case 40: // dload_2
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case 41: // dload_3
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instr = loadStore( ValueType.f64, true, op - 38, codePos );
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break;
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//TODO case 42: //aload_0
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//TODO case 43: //aload_1
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//TODO case 44: //aload_2
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//TODO case 45: //aload_3
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//TODO case 46: // iaload
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//TODO case 47: // laload
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//TODO case 48: // faload
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//TODO case 49: // daload
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//TODO case 50: // aaload
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//TODO case 51: // baload
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//TODO case 52: // caload
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//TODO case 53: // saload
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case 54: // istore
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instr = loadStore( ValueType.i32, false, byteCode.readUnsignedByte(), codePos );
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break;
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case 55: // lstore
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instr = loadStore( ValueType.i64, false, byteCode.readUnsignedByte(), codePos );
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break;
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case 56: // fstore
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instr = loadStore( ValueType.f32, false, byteCode.readUnsignedByte(), codePos );
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break;
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case 57: // dstore
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instr = loadStore( ValueType.f64, false, byteCode.readUnsignedByte(), codePos );
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break;
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//TODO case 58: // astore
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case 59: // istore_0
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case 60: // istore_1
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case 61: // istore_2
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case 62: // istore_3
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instr = loadStore( ValueType.i32, false, op - 59, codePos );
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break;
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case 63: // lstore_0
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case 64: // lstore_1
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case 65: // lstore_2
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case 66: // lstore_3
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instr = loadStore( ValueType.i64, false, op - 63, codePos );
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break;
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case 67: // fstore_0
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case 68: // fstore_1
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case 69: // fstore_2
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case 70: // fstore_3
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instr = loadStore( ValueType.f32, false, op - 67, codePos );
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break;
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case 71: // dstore_0
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case 72: // dstore_1
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case 73: // dstore_2
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case 74: // dstore_3
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instr = loadStore( ValueType.f64, false, op - 71, codePos );
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break;
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case 75: // astore_0
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case 76: // astore_1
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case 77: // astore_2
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case 78: // astore_3
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instr = loadStore( ValueType.anyref, false, op - 75, codePos );
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break;
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//TODO case 79: // iastore
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//TODO case 80: // lastore
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//TODO case 81: // fastore
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//TODO case 82: // dastore
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//TODO case 83: // aastore
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//TODO case 84: // bastore
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//TODO case 85: // castore
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//TODO case 86: // sastore
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case 87: // pop
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case 88: // pop2
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instr = new WasmBlockInstruction( WasmBlockOperator.DROP, null, codePos );
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break;
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case 89: // dup: duplicate the value on top of the stack
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case 90: // dup_x1
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case 91: // dup_x2
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case 92: // dup2
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case 93: // dup2_x1
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case 94: // dup2_x2
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case 95: // swap
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// can be do with functions with more as one return value in future WASM standard
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throw new WasmException( "Stack duplicate is not supported in current WASM. try to save immediate values in a local variable: " + op, byteCode.getLineNumber() );
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case 96: // iadd
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instr = new WasmNumericInstruction( NumericOperator.add, ValueType.i32, codePos);
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break;
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case 97: // ladd
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instr = new WasmNumericInstruction( NumericOperator.add, ValueType.i64, codePos );
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break;
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case 98: // fadd
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instr = new WasmNumericInstruction( NumericOperator.add, ValueType.f32, codePos );
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break;
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case 99: // dadd
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instr = new WasmNumericInstruction( NumericOperator.add, ValueType.f64, codePos );
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break;
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case 100: // isub
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instr = new WasmNumericInstruction( NumericOperator.sub, ValueType.i32, codePos );
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break;
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case 101: // lsub
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instr = new WasmNumericInstruction( NumericOperator.sub, ValueType.i64, codePos );
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break;
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case 102: // fsub
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instr = new WasmNumericInstruction( NumericOperator.sub, ValueType.f32, codePos );
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break;
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case 103: // dsub
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instr = new WasmNumericInstruction( NumericOperator.sub, ValueType.f64, codePos );
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break;
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case 104: // imul;
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instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.i32, codePos );
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break;
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case 105: // lmul
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instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.i64, codePos );
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break;
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case 106: // fmul
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instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.f32, codePos );
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break;
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case 107: // dmul
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instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.f64, codePos );
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break;
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case 108: // idiv
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instr = new WasmNumericInstruction( NumericOperator.div, ValueType.i32, codePos );
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break;
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case 109: // ldiv
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instr = new WasmNumericInstruction( NumericOperator.div, ValueType.i64, codePos );
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break;
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case 110: // fdiv
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instr = new WasmNumericInstruction( NumericOperator.div, ValueType.f32, codePos );
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break;
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case 111: // ddiv
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instr = new WasmNumericInstruction( NumericOperator.div, ValueType.f64, codePos );
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break;
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case 112: // irem
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instr = new WasmNumericInstruction( NumericOperator.rem, ValueType.i32, codePos );
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break;
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case 113: // lrem
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instr = new WasmNumericInstruction( NumericOperator.rem, ValueType.i64, codePos );
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break;
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case 114: // frem
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case 115: // drem
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//TODO can be implemented with a helper function like: (a - (long)(a / b) * (double)b)
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throw new WasmException( "Modulo/Remainder for floating numbers is not supported in WASM. Use int or long data types." + op, byteCode.getLineNumber() );
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case 116: // ineg
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instructions.add( new WasmConstInstruction( -1, ValueType.i32, codePos ) );
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instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.i32, codePos );
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break;
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case 117: // lneg
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instructions.add( new WasmConstInstruction( (long)-1, ValueType.i64, codePos ) ) ;
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instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.i64, codePos );
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break;
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case 118: // fneg
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instr = new WasmNumericInstruction( NumericOperator.neg, ValueType.f32, codePos );
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break;
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case 119: // dneg
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instr = new WasmNumericInstruction( NumericOperator.neg, ValueType.f64, codePos );
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break;
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case 120: // ishl
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instr = new WasmNumericInstruction( NumericOperator.shl, ValueType.i32, codePos );
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break;
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case 121: // lshl
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instructions.add( new WasmConvertInstruction( ValueTypeConvertion.i2l, codePos ) ); // the shift parameter must be of type long!!!
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instr = new WasmNumericInstruction( NumericOperator.shl, ValueType.i64, codePos );
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break;
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case 122: // ishr
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instr = new WasmNumericInstruction( NumericOperator.shr_s, ValueType.i32, codePos );
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break;
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case 123: // lshr
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instructions.add( new WasmConvertInstruction( ValueTypeConvertion.i2l, codePos ) ); // the shift parameter must be of type long!!!
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instr = new WasmNumericInstruction( NumericOperator.shr_s, ValueType.i64, codePos );
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break;
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case 124: // iushr
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instr = new WasmNumericInstruction( NumericOperator.shr_u, ValueType.i32, codePos );
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break;
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case 125: // lushr
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instructions.add( new WasmConvertInstruction( ValueTypeConvertion.i2l, codePos ) ); // the shift parameter must be of type long!!!
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instr = new WasmNumericInstruction( NumericOperator.shr_u, ValueType.i64, codePos );
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break;
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case 126: // iand
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instr = new WasmNumericInstruction( NumericOperator.and, ValueType.i32, codePos );
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break;
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case 127: // land
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instr = new WasmNumericInstruction( NumericOperator.and, ValueType.i64, codePos );
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break;
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case 128: // ior
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instr = new WasmNumericInstruction( NumericOperator.or, ValueType.i32, codePos );
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break;
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case 129: // lor
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instr = new WasmNumericInstruction( NumericOperator.or, ValueType.i64, codePos );
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break;
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case 130: // ixor
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instr = new WasmNumericInstruction( NumericOperator.xor, ValueType.i32, codePos );
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break;
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case 131: // lxor
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instr = new WasmNumericInstruction( NumericOperator.xor, ValueType.i64, codePos );
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break;
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case 132: // iinc
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int idx = byteCode.readUnsignedByte();
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instructions.add( new WasmLoadStoreInstruction( true, idx, localVariables, codePos ) );
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instructions.add( new WasmConstInstruction( (int)byteCode.readByte(), ValueType.i32, codePos ) );
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instructions.add( new WasmNumericInstruction( NumericOperator.add, ValueType.i32, codePos) );
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instr = new WasmLoadStoreInstruction( false, idx, localVariables, codePos );
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break;
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case 133: // i2l
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instr = new WasmConvertInstruction( ValueTypeConvertion.i2l, codePos );
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break;
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case 134: // i2f
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instr = new WasmConvertInstruction( ValueTypeConvertion.i2f, codePos );
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break;
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case 135: // i2d
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instr = new WasmConvertInstruction( ValueTypeConvertion.i2d, codePos );
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break;
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case 136: // l2i
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instr = new WasmConvertInstruction( ValueTypeConvertion.l2i, codePos );
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break;
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case 137: // l2f
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instr = new WasmConvertInstruction( ValueTypeConvertion.l2f, codePos );
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break;
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case 138: // l2d
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instr = new WasmConvertInstruction( ValueTypeConvertion.l2d, codePos );
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break;
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case 139: // f2i
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instr = new WasmConvertInstruction( ValueTypeConvertion.f2i, codePos );
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break;
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case 140: // f2l
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instr = new WasmConvertInstruction( ValueTypeConvertion.f2l, codePos );
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break;
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case 141: // f2d
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instr = new WasmConvertInstruction( ValueTypeConvertion.f2d, codePos );
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break;
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case 142: // d2i
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instr = new WasmConvertInstruction( ValueTypeConvertion.d2i, codePos );
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break;
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case 143: // d2l
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instr = new WasmConvertInstruction( ValueTypeConvertion.d2l, codePos );
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break;
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case 144: // d2f
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instr = new WasmConvertInstruction( ValueTypeConvertion.d2f, codePos );
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break;
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case 145: // i2b
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instr = new WasmConvertInstruction( ValueTypeConvertion.i2b, codePos );
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break;
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case 146: // i2c
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instructions.add( new WasmConstInstruction( 0xFFFF, ValueType.i32, codePos ) );
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instr = new WasmNumericInstruction( NumericOperator.and, ValueType.i32, codePos );
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break;
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case 147: // i2s
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instr = new WasmConvertInstruction( ValueTypeConvertion.i2s, codePos );
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break;
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case 148: // lcmp
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opCompare( ValueType.i64, byteCode, codePos );
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break;
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case 149: // fcmpl
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case 150: // fcmpg
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opCompare( ValueType.f32, byteCode, codePos );
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break;
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case 151: // dcmpl
|
||||
case 152: // dcmpg
|
||||
opCompare( ValueType.f64, byteCode, codePos );
|
||||
break;
|
||||
case 153: // ifeq
|
||||
opIfCondition( NumericOperator.eq, byteCode, codePos );
|
||||
break;
|
||||
case 154: // ifne
|
||||
opIfCondition( NumericOperator.ne, byteCode, codePos );
|
||||
break;
|
||||
case 155: // iflt
|
||||
opIfCondition( NumericOperator.lt, byteCode, codePos );
|
||||
break;
|
||||
case 156: // ifge
|
||||
opIfCondition( NumericOperator.ge, byteCode, codePos );
|
||||
break;
|
||||
case 157: // ifgt
|
||||
opIfCondition( NumericOperator.gt, byteCode, codePos );
|
||||
break;
|
||||
case 158: // ifle
|
||||
opIfCondition( NumericOperator.le, byteCode, codePos );
|
||||
break;
|
||||
case 159: // if_icmpeq
|
||||
opIfCompareCondition( NumericOperator.eq, byteCode, codePos );
|
||||
break;
|
||||
case 160: // if_icmpne
|
||||
opIfCompareCondition( NumericOperator.ne, byteCode, codePos );
|
||||
break;
|
||||
case 161: // if_icmplt
|
||||
opIfCompareCondition( NumericOperator.lt, byteCode, codePos );
|
||||
break;
|
||||
case 162: // if_icmpge
|
||||
opIfCompareCondition( NumericOperator.ge, byteCode, codePos );
|
||||
break;
|
||||
case 163: // if_icmpgt
|
||||
opIfCompareCondition( NumericOperator.gt, byteCode, codePos );
|
||||
break;
|
||||
case 164: // if_icmple
|
||||
opIfCompareCondition( NumericOperator.le, byteCode, codePos );
|
||||
break;
|
||||
//TODO case 165: // if_acmpeq
|
||||
//TODO case 166: // if_acmpne
|
||||
case 167: // goto
|
||||
int offset = byteCode.readShort();
|
||||
branchManager.addGotoOperator( codePos, offset, byteCode.getLineNumber() );
|
||||
instr = new WasmNopInstruction( codePos ); // marker of the line number for the branch manager
|
||||
break;
|
||||
//TODO case 168: // jsr
|
||||
//TODO case 169: // ret
|
||||
case 170: // tableswitch
|
||||
case 171: // lookupswitch
|
||||
writeSwitchCode( byteCode, op == 171 );
|
||||
break;
|
||||
case 172: // ireturn
|
||||
case 173: // lreturn
|
||||
case 174: // freturn
|
||||
case 175: // dreturn
|
||||
case 176: // areturn
|
||||
case 177: // return void
|
||||
ValueType type = null;
|
||||
switch ( op ) {
|
||||
case 172: // ireturn
|
||||
type = ValueType.i32;
|
||||
break;
|
||||
case 173: // lreturn
|
||||
type = ValueType.i64;
|
||||
break;
|
||||
case 174: // freturn
|
||||
type = ValueType.f32;
|
||||
break;
|
||||
case 175: // dreturn
|
||||
type = ValueType.f64;
|
||||
break;
|
||||
case 176: // areturn
|
||||
type = ValueType.anyref;
|
||||
break;
|
||||
}
|
||||
instr = new WasmBlockInstruction( WasmBlockOperator.RETURN, type, codePos );
|
||||
endWithReturn = true;
|
||||
break;
|
||||
case 178: // getstatic
|
||||
ConstantRef ref = (ConstantRef)constantPool.get( byteCode.readUnsignedShort() );
|
||||
instr = new WasmGlobalInstruction( true, ref, codePos );
|
||||
break;
|
||||
case 179: // putstatic
|
||||
ref = (ConstantRef)constantPool.get( byteCode.readUnsignedShort() );
|
||||
instr = new WasmGlobalInstruction( false, ref, codePos );
|
||||
break;
|
||||
//TODO case 180: // getfield
|
||||
//TODO case 181: // putfield
|
||||
//TODO case 182: // invokevirtual
|
||||
//TODO case 183: // invokespecial
|
||||
case 184: // invokestatic
|
||||
idx = byteCode.readUnsignedShort();
|
||||
ref = (ConstantRef)constantPool.get( idx );
|
||||
instr = new WasmCallInstruction( ref, codePos );
|
||||
break;
|
||||
//TODO case 185: // invokeinterface
|
||||
//TODO case 186: // invokedynamic
|
||||
//TODO case 187: // new
|
||||
//TODO case 188: // newarray
|
||||
//TODO case 189: // anewarray
|
||||
//TODO case 190: // arraylength
|
||||
//TODO case 191: // athrow
|
||||
//TODO case 192: // checkcast
|
||||
//TODO case 193: // instanceof
|
||||
//TODO case 194: // monitorenter
|
||||
//TODO case 195: // monitorexit
|
||||
//TODO case 196: // wide
|
||||
//TODO case 197: // multianewarray
|
||||
//TODO case 198: // ifnull
|
||||
//TODO case 199: // ifnonnull
|
||||
//TODO case 200: // goto_w
|
||||
//TODO case 201: // jsr_w
|
||||
default:
|
||||
throw new WasmException( "Unimplemented Java byte code operation: " + op, byteCode.getLineNumber() );
|
||||
}
|
||||
if( instr != null ) {
|
||||
instructions.add( instr );
|
||||
}
|
||||
}
|
||||
branchManager.calculate();
|
||||
branchManager.handle( byteCode ); // add branch operations
|
||||
if( !endWithReturn && hasReturn ) {
|
||||
// if a method ends with a loop without a break then code after the loop is no reachable
|
||||
// Java does not need a return byte code in this case
|
||||
// But WebAssembly need the dead code to validate
|
||||
instructions.add( new WasmBlockInstruction( WasmBlockOperator.UNREACHABLE, null, byteCode.getCodePosition() ) );
|
||||
}
|
||||
} catch( WasmException ex ) {
|
||||
throw ex;
|
||||
} catch( Exception ex ) {
|
||||
throw WasmException.create( ex, byteCode.getLineNumber() );
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Write the both switch operation codes
|
||||
*
|
||||
* @param byteCode
|
||||
* the current stream with a position after the operation code
|
||||
* @param isLookupSwitch
|
||||
* true, if the operation was a loopupswitch; false, if the operation was a tableswitch
|
||||
* @throws IOException
|
||||
* if any I/O error occur
|
||||
*/
|
||||
private void writeSwitchCode( CodeInputStream byteCode, boolean isLookupSwitch ) throws IOException {
|
||||
int lineNumber = byteCode.getLineNumber();
|
||||
int codePos = byteCode.getCodePosition();
|
||||
int startPosition = codePos;
|
||||
int padding = startPosition % 4;
|
||||
if( padding > 0 ) {
|
||||
byteCode.skip( 4 - padding );
|
||||
}
|
||||
startPosition--;
|
||||
int switchValuestartPosition = findPreviousPushCodePosition();
|
||||
|
||||
int defaultPosition = startPosition + byteCode.readInt();
|
||||
int[] keys;
|
||||
int[] positions;
|
||||
if( isLookupSwitch ) { // lookupswitch
|
||||
int count = byteCode.readInt();
|
||||
keys = new int[count];
|
||||
positions = new int[count];
|
||||
for( int i = 0; i < count; i++ ) {
|
||||
keys[i] = byteCode.readInt();
|
||||
positions[i] = startPosition + byteCode.readInt();
|
||||
}
|
||||
int tempI32 = localVariables.getTempI32();
|
||||
int block = 0;
|
||||
int defaultBlock = -1;
|
||||
int currentPos = -1;
|
||||
instructions.add( new WasmLoadStoreInstruction( false, tempI32, localVariables, codePos ) );
|
||||
do {
|
||||
int nextPos = findNext( currentPos, positions );
|
||||
if( nextPos == currentPos ) {
|
||||
break;
|
||||
}
|
||||
currentPos = nextPos;
|
||||
if( defaultBlock < 0 ) {
|
||||
if( defaultPosition <= currentPos ) {
|
||||
defaultBlock = block;
|
||||
if( defaultPosition < currentPos ) {
|
||||
block++;
|
||||
}
|
||||
}
|
||||
}
|
||||
for( int i = 0; i < positions.length; i++ ) {
|
||||
if( positions[i] == currentPos ) {
|
||||
instructions.add( new WasmLoadStoreInstruction( true, tempI32, localVariables, codePos ) );
|
||||
instructions.add( new WasmConstInstruction( keys[i], ValueType.i32, codePos ) );
|
||||
instructions.add( new WasmNumericInstruction( NumericOperator.eq, ValueType.i32, codePos ) );
|
||||
instructions.add( new WasmBlockInstruction( WasmBlockOperator.BR_IF, block, codePos ) );
|
||||
}
|
||||
}
|
||||
block++;
|
||||
} while( true );
|
||||
if( defaultBlock < 0 ) {
|
||||
defaultBlock = block;
|
||||
}
|
||||
instructions.add( new WasmBlockInstruction( WasmBlockOperator.BR, defaultBlock, codePos ) );
|
||||
} else {
|
||||
int low = byteCode.readInt();
|
||||
keys = null;
|
||||
int count = byteCode.readInt() - low + 1;
|
||||
positions = new int[count];
|
||||
for( int i = 0; i < count; i++ ) {
|
||||
positions[i] = startPosition + byteCode.readInt();
|
||||
}
|
||||
if( low != 0 ) { // the br_table starts ever with the value 0. That we need to subtract the start value if it different
|
||||
instructions.add( new WasmConstInstruction( low, ValueType.i32, codePos ) );
|
||||
instructions.add( new WasmNumericInstruction( NumericOperator.sub, ValueType.i32, codePos ) );
|
||||
}
|
||||
}
|
||||
branchManager.addSwitchOperator( switchValuestartPosition, 0, lineNumber, keys, positions, defaultPosition );
|
||||
}
|
||||
|
||||
/**
|
||||
* We need one value from the stack inside of a block. We need to find the code position on which the block can
|
||||
* start. If this a function call or numeric expression this can be complex to find the right point.
|
||||
*
|
||||
* @return the code position
|
||||
*/
|
||||
private int findPreviousPushCodePosition() {
|
||||
int valueCount = 0;
|
||||
for( int i = instructions.size() - 1; i >= 0; i-- ) {
|
||||
WasmInstruction instr = instructions.get( i );
|
||||
ValueType valueType = instr.getPushValueType();
|
||||
if( valueType != null ) {
|
||||
valueCount++;
|
||||
}
|
||||
valueCount -= instr.getPopCount();
|
||||
if( valueCount == 1 ) {
|
||||
return instr.getCodePosition();
|
||||
}
|
||||
}
|
||||
throw new WasmException( "Switch start position not found", -1 ); // should never occur
|
||||
}
|
||||
|
||||
/**
|
||||
* Find the next higher value.
|
||||
*
|
||||
* @param current
|
||||
* the current value
|
||||
* @param values
|
||||
* the unordered list of values
|
||||
* @return the next value or current value if not found.
|
||||
*/
|
||||
private static int findNext( int current, int[] values ) {
|
||||
boolean find = false;
|
||||
int next = Integer.MAX_VALUE;
|
||||
for( int val : values ) {
|
||||
if( val > current && val <= next ) {
|
||||
next = val;
|
||||
find = true;
|
||||
}
|
||||
}
|
||||
return find ? next : current;
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a WasmLoadStoreInstruction.
|
||||
*
|
||||
* @param valueType
|
||||
* the value type
|
||||
* @param load
|
||||
* true: if load
|
||||
* @param idx
|
||||
* the memory/slot idx of the variable
|
||||
* @param codePos
|
||||
* the code position/offset in the Java method
|
||||
* @return the WasmLoadStoreInstruction
|
||||
*/
|
||||
@Nonnull
|
||||
private WasmLoadStoreInstruction loadStore( ValueType valueType, boolean load, @Nonnegative int idx, int codePos ) {
|
||||
localVariables.use( valueType, idx );
|
||||
return new WasmLoadStoreInstruction( load, idx, localVariables, codePos );
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle the if<condition> of the Java byte code. This Java instruction compare the first stack value with value 0.
|
||||
* Important: In the Java IF expression the condition for the jump to the else block is saved. In WebAssembler we
|
||||
* need to use condition for the if block. The caller of the method must already negate this
|
||||
* @param compareOp
|
||||
* The condition for the continue of a loop.
|
||||
* @param byteCode
|
||||
* current byte code stream to read the target offset.
|
||||
* @param codePos
|
||||
* the code position/offset in the Java method
|
||||
*
|
||||
* @throws IOException
|
||||
* if any I/O errors occur.
|
||||
*/
|
||||
private void opIfCondition( NumericOperator compareOp, CodeInputStream byteCode, int codePos ) throws IOException {
|
||||
instructions.add( new WasmConstInstruction( 0, ValueType.i32, codePos ) );
|
||||
opIfCompareCondition( compareOp, byteCode, codePos );
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle the if<condition> of the Java byte code. This Java instruction compare 2 values from stack.
|
||||
* Important: In the Java IF expression the condition for the jump to the else block is saved. In WebAssembler we need to use
|
||||
* condition for the if block. The caller of the method must already negate this.
|
||||
* @param compareOp
|
||||
* The condition for the continue of a loop.
|
||||
* @param byteCode
|
||||
* current byte code stream to read the target offset.
|
||||
* @param codePos
|
||||
* the code position/offset in the Java method
|
||||
*
|
||||
* @throws IOException
|
||||
* if any I/O errors occur.
|
||||
*/
|
||||
private void opIfCompareCondition( NumericOperator compareOp, CodeInputStream byteCode, int codePos ) throws IOException {
|
||||
int offset = byteCode.readShort();
|
||||
WasmNumericInstruction compare = new WasmNumericInstruction( compareOp, ValueType.i32, codePos );
|
||||
branchManager.addIfOperator( codePos, offset, byteCode.getLineNumber(), compare );
|
||||
instructions.add( compare );
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle the different compare operator. The compare operator returns the integer values -1, 0 or 1. There is no
|
||||
* equivalent in WebAssembly. That we need to read the next operation to find an equivalent.
|
||||
*
|
||||
* @param valueType
|
||||
* the value type of the compared
|
||||
* @param byteCode
|
||||
* current byte code stream to read the next operation.
|
||||
* @param codePos
|
||||
* the code position/offset in the Java method
|
||||
* @throws IOException
|
||||
* if any I/O errors occur.
|
||||
*/
|
||||
private void opCompare( ValueType valueType, CodeInputStream byteCode, int codePos ) throws IOException {
|
||||
codePos = byteCode.getCodePosition();
|
||||
NumericOperator numOp;
|
||||
int nextOp = byteCode.read();
|
||||
switch( nextOp ){
|
||||
case 153: // ifeq
|
||||
numOp = NumericOperator.eq;
|
||||
break;
|
||||
case 154: // ifne
|
||||
numOp = NumericOperator.ne;
|
||||
break;
|
||||
case 155: // iflt
|
||||
numOp = NumericOperator.lt;
|
||||
break;
|
||||
case 156: // ifge
|
||||
numOp = NumericOperator.ge;
|
||||
break;
|
||||
case 157: // ifgt
|
||||
numOp = NumericOperator.gt;
|
||||
break;
|
||||
case 158: // ifle
|
||||
numOp = NumericOperator.le;
|
||||
break;
|
||||
default:
|
||||
throw new WasmException( "Unexpected compare sub operation: " + nextOp, -1 );
|
||||
}
|
||||
int offset = byteCode.readShort();
|
||||
WasmNumericInstruction compare = new WasmNumericInstruction( numOp, valueType, codePos );
|
||||
branchManager.addIfOperator( codePos, offset, byteCode.getLineNumber(), compare );
|
||||
instructions.add( compare );
|
||||
}
|
||||
|
||||
}
|
||||
@ -16,19 +16,16 @@
|
||||
package de.inetsoftware.jwebassembly.module;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.util.ArrayList;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import java.util.function.Consumer;
|
||||
|
||||
import javax.annotation.Nonnegative;
|
||||
import javax.annotation.Nonnull;
|
||||
import javax.annotation.Nullable;
|
||||
|
||||
import de.inetsoftware.classparser.ClassFile;
|
||||
import de.inetsoftware.classparser.Code;
|
||||
import de.inetsoftware.classparser.CodeInputStream;
|
||||
import de.inetsoftware.classparser.ConstantPool;
|
||||
import de.inetsoftware.classparser.ConstantRef;
|
||||
import de.inetsoftware.classparser.LocalVariableTable;
|
||||
import de.inetsoftware.classparser.MethodInfo;
|
||||
import de.inetsoftware.jwebassembly.WasmException;
|
||||
@ -40,19 +37,13 @@ import de.inetsoftware.jwebassembly.WasmException;
|
||||
*/
|
||||
public class ModuleGenerator {
|
||||
|
||||
private final ModuleWriter writer;
|
||||
private final ModuleWriter writer;
|
||||
|
||||
private ValueType returnType;
|
||||
private final JavaMethodWasmCodeBuilder codeBuilder = new JavaMethodWasmCodeBuilder();
|
||||
|
||||
private LocaleVariableManager localVariables = new LocaleVariableManager();
|
||||
private String sourceFile;
|
||||
|
||||
private String sourceFile;
|
||||
|
||||
private String className;
|
||||
|
||||
private final List<WasmInstruction> instructions = new ArrayList<>();
|
||||
|
||||
private BranchManger branchManager = new BranchManger( instructions );
|
||||
private String className;
|
||||
|
||||
/**
|
||||
* Create a new generator.
|
||||
@ -132,7 +123,7 @@ public class ModuleGenerator {
|
||||
String impoarModule = (String)annotationValues.get( "module" );
|
||||
String importName = (String)annotationValues.get( "name" );
|
||||
writer.prepareImport( name, impoarModule, importName );
|
||||
writeMethodSignature( method, null );
|
||||
writeMethodSignature( method, null, null );
|
||||
} else {
|
||||
writer.prepareFunction( name );
|
||||
}
|
||||
@ -158,15 +149,10 @@ public class ModuleGenerator {
|
||||
writeExport( name, method );
|
||||
writer.writeMethodStart( name );
|
||||
|
||||
localVariables.reset();
|
||||
branchManager.reset( code.getExceptionTable() );
|
||||
codeBuilder.buildCode( code, !method.getDescription().endsWith( ")V" ) );
|
||||
writeMethodSignature( method, code.getLocalVariableTable(), codeBuilder );
|
||||
|
||||
byteCode = code.getByteCode();
|
||||
writeCode( byteCode, method.getConstantPool() );
|
||||
localVariables.calculate();
|
||||
writeMethodSignature( method, code.getLocalVariableTable() );
|
||||
|
||||
for( WasmInstruction instruction : instructions ) {
|
||||
for( WasmInstruction instruction : codeBuilder.getInstructions() ) {
|
||||
instruction.writeTo( writer );
|
||||
}
|
||||
writer.writeMethodFinish();
|
||||
@ -204,12 +190,16 @@ public class ModuleGenerator {
|
||||
*
|
||||
* @param method
|
||||
* the method
|
||||
* @param variables
|
||||
* Java variable table with names of the variables for debugging
|
||||
* @param codeBuilder
|
||||
* the calculated variables
|
||||
* @throws IOException
|
||||
* if any I/O error occur
|
||||
* @throws WasmException
|
||||
* if some Java code can't converted
|
||||
*/
|
||||
private void writeMethodSignature( MethodInfo method, LocalVariableTable variables ) throws IOException, WasmException {
|
||||
private void writeMethodSignature( MethodInfo method, @Nullable LocalVariableTable variables, WasmCodeBuilder codeBuilder ) throws IOException, WasmException {
|
||||
String signature = method.getDescription();
|
||||
String kind = "param";
|
||||
int paramCount = 0;
|
||||
@ -231,723 +221,18 @@ public class ModuleGenerator {
|
||||
writer.writeMethodParam( kind, type, name );
|
||||
}
|
||||
}
|
||||
this.returnType = type;
|
||||
List<ValueType> localTypes = localVariables.getLocalTypes( paramCount );
|
||||
for( int i = 0; i < localTypes.size(); i++ ) {
|
||||
type = localTypes.get( i );
|
||||
String name = null;
|
||||
if( variables != null ) {
|
||||
name = variables.getPosition( paramCount ).getName( method.getConstantPool() );
|
||||
if( codeBuilder != null ) {
|
||||
List<ValueType> localTypes = codeBuilder.getLocalTypes( paramCount );
|
||||
for( int i = 0; i < localTypes.size(); i++ ) {
|
||||
type = localTypes.get( i );
|
||||
String name = null;
|
||||
if( variables != null ) {
|
||||
name = variables.getPosition( paramCount ).getName( method.getConstantPool() );
|
||||
}
|
||||
writer.writeMethodParam( "local", type, name );
|
||||
}
|
||||
writer.writeMethodParam( "local", type, name );
|
||||
}
|
||||
writer.writeMethodParamFinish( );
|
||||
}
|
||||
|
||||
/**
|
||||
* Write the byte code of a method.
|
||||
*
|
||||
* @param byteCode
|
||||
* a stream of byte code
|
||||
* @param constantPool
|
||||
* the constant pool of the the current class
|
||||
* @throws WasmException
|
||||
* if some Java code can't converted
|
||||
*/
|
||||
private void writeCode( CodeInputStream byteCode, ConstantPool constantPool ) throws WasmException {
|
||||
instructions.clear();
|
||||
boolean endWithReturn = false;
|
||||
try {
|
||||
while( byteCode.available() > 0 ) {
|
||||
WasmInstruction instr = null;
|
||||
int codePos = byteCode.getCodePosition();
|
||||
endWithReturn = false;
|
||||
int op = byteCode.readUnsignedByte();
|
||||
switch( op ) {
|
||||
case 0: // nop
|
||||
break;
|
||||
//TODO case 1: // aconst_null
|
||||
case 2: // iconst_m1
|
||||
case 3: // iconst_0
|
||||
case 4: // iconst_1
|
||||
case 5: // iconst_2
|
||||
case 6: // iconst_3
|
||||
case 7: // iconst_4
|
||||
case 8: // iconst_5
|
||||
instr = new WasmConstInstruction( Integer.valueOf( op - 3 ), ValueType.i32, codePos );
|
||||
break;
|
||||
case 9: // lconst_0
|
||||
case 10: // lconst_1
|
||||
instr = new WasmConstInstruction( Long.valueOf( op - 9 ), ValueType.i64, codePos );
|
||||
break;
|
||||
case 11: // fconst_0
|
||||
case 12: // fconst_1
|
||||
case 13: // fconst_2
|
||||
instr = new WasmConstInstruction( Float.valueOf( op - 11 ), ValueType.f32, codePos );
|
||||
break;
|
||||
case 14: // dconst_0
|
||||
case 15: // dconst_1
|
||||
instr = new WasmConstInstruction( Double.valueOf( op - 14 ), ValueType.f64, codePos );
|
||||
break;
|
||||
case 16: // bipush
|
||||
instr = new WasmConstInstruction( Integer.valueOf( byteCode.readByte() ), ValueType.i32, codePos );
|
||||
break;
|
||||
case 17: // sipush
|
||||
instr = new WasmConstInstruction( Integer.valueOf( byteCode.readShort() ), ValueType.i32, codePos );
|
||||
break;
|
||||
case 18: // ldc
|
||||
instr = new WasmConstInstruction( (Number)constantPool.get( byteCode.readUnsignedByte() ), codePos );
|
||||
break;
|
||||
case 19: // ldc_w
|
||||
case 20: // ldc2_w
|
||||
instr = new WasmConstInstruction( (Number)constantPool.get( byteCode.readUnsignedShort() ), codePos );
|
||||
break;
|
||||
case 21: // iload
|
||||
instr = loadStore( ValueType.i32, true, byteCode.readUnsignedByte(), codePos );
|
||||
break;
|
||||
case 22: // lload
|
||||
instr = loadStore( ValueType.i64, true, byteCode.readUnsignedByte(), codePos );
|
||||
break;
|
||||
case 23: // fload
|
||||
instr = loadStore( ValueType.f32, true, byteCode.readUnsignedByte(), codePos );
|
||||
break;
|
||||
case 24: // dload
|
||||
instr = loadStore( ValueType.f64, true, byteCode.readUnsignedByte(), codePos );
|
||||
break;
|
||||
//TODO case 25: // aload
|
||||
case 26: // iload_0
|
||||
case 27: // iload_1
|
||||
case 28: // iload_2
|
||||
case 29: // iload_3
|
||||
instr = loadStore( ValueType.i32, true, op - 26, codePos );
|
||||
break;
|
||||
case 30: // lload_0
|
||||
case 31: // lload_1
|
||||
case 32: // lload_2
|
||||
case 33: // lload_3
|
||||
instr = loadStore( ValueType.i64, true, op - 30, codePos );
|
||||
break;
|
||||
case 34: // fload_0
|
||||
case 35: // fload_1
|
||||
case 36: // fload_2
|
||||
case 37: // fload_3
|
||||
instr = loadStore( ValueType.f32, true, op - 34, codePos );
|
||||
break;
|
||||
case 38: // dload_0
|
||||
case 39: // dload_1
|
||||
case 40: // dload_2
|
||||
case 41: // dload_3
|
||||
instr = loadStore( ValueType.f64, true, op - 38, codePos );
|
||||
break;
|
||||
//TODO case 42: //aload_0
|
||||
//TODO case 43: //aload_1
|
||||
//TODO case 44: //aload_2
|
||||
//TODO case 45: //aload_3
|
||||
//TODO case 46: // iaload
|
||||
//TODO case 47: // laload
|
||||
//TODO case 48: // faload
|
||||
//TODO case 49: // daload
|
||||
//TODO case 50: // aaload
|
||||
//TODO case 51: // baload
|
||||
//TODO case 52: // caload
|
||||
//TODO case 53: // saload
|
||||
case 54: // istore
|
||||
instr = loadStore( ValueType.i32, false, byteCode.readUnsignedByte(), codePos );
|
||||
break;
|
||||
case 55: // lstore
|
||||
instr = loadStore( ValueType.i64, false, byteCode.readUnsignedByte(), codePos );
|
||||
break;
|
||||
case 56: // fstore
|
||||
instr = loadStore( ValueType.f32, false, byteCode.readUnsignedByte(), codePos );
|
||||
break;
|
||||
case 57: // dstore
|
||||
instr = loadStore( ValueType.f64, false, byteCode.readUnsignedByte(), codePos );
|
||||
break;
|
||||
//TODO case 58: // astore
|
||||
case 59: // istore_0
|
||||
case 60: // istore_1
|
||||
case 61: // istore_2
|
||||
case 62: // istore_3
|
||||
instr = loadStore( ValueType.i32, false, op - 59, codePos );
|
||||
break;
|
||||
case 63: // lstore_0
|
||||
case 64: // lstore_1
|
||||
case 65: // lstore_2
|
||||
case 66: // lstore_3
|
||||
instr = loadStore( ValueType.i64, false, op - 63, codePos );
|
||||
break;
|
||||
case 67: // fstore_0
|
||||
case 68: // fstore_1
|
||||
case 69: // fstore_2
|
||||
case 70: // fstore_3
|
||||
instr = loadStore( ValueType.f32, false, op - 67, codePos );
|
||||
break;
|
||||
case 71: // dstore_0
|
||||
case 72: // dstore_1
|
||||
case 73: // dstore_2
|
||||
case 74: // dstore_3
|
||||
instr = loadStore( ValueType.f64, false, op - 71, codePos );
|
||||
break;
|
||||
case 75: // astore_0
|
||||
case 76: // astore_1
|
||||
case 77: // astore_2
|
||||
case 78: // astore_3
|
||||
instr = loadStore( ValueType.anyref, false, op - 75, codePos );
|
||||
break;
|
||||
//TODO case 79: // iastore
|
||||
//TODO case 80: // lastore
|
||||
//TODO case 81: // fastore
|
||||
//TODO case 82: // dastore
|
||||
//TODO case 83: // aastore
|
||||
//TODO case 84: // bastore
|
||||
//TODO case 85: // castore
|
||||
//TODO case 86: // sastore
|
||||
case 87: // pop
|
||||
case 88: // pop2
|
||||
instr = new WasmBlockInstruction( WasmBlockOperator.DROP, null, codePos );
|
||||
break;
|
||||
case 89: // dup: duplicate the value on top of the stack
|
||||
case 90: // dup_x1
|
||||
case 91: // dup_x2
|
||||
case 92: // dup2
|
||||
case 93: // dup2_x1
|
||||
case 94: // dup2_x2
|
||||
case 95: // swap
|
||||
// can be do with functions with more as one return value in future WASM standard
|
||||
throw new WasmException( "Stack duplicate is not supported in current WASM. try to save immediate values in a local variable: " + op, sourceFile, className, byteCode.getLineNumber() );
|
||||
case 96: // iadd
|
||||
instr = new WasmNumericInstruction( NumericOperator.add, ValueType.i32, codePos);
|
||||
break;
|
||||
case 97: // ladd
|
||||
instr = new WasmNumericInstruction( NumericOperator.add, ValueType.i64, codePos );
|
||||
break;
|
||||
case 98: // fadd
|
||||
instr = new WasmNumericInstruction( NumericOperator.add, ValueType.f32, codePos );
|
||||
break;
|
||||
case 99: // dadd
|
||||
instr = new WasmNumericInstruction( NumericOperator.add, ValueType.f64, codePos );
|
||||
break;
|
||||
case 100: // isub
|
||||
instr = new WasmNumericInstruction( NumericOperator.sub, ValueType.i32, codePos );
|
||||
break;
|
||||
case 101: // lsub
|
||||
instr = new WasmNumericInstruction( NumericOperator.sub, ValueType.i64, codePos );
|
||||
break;
|
||||
case 102: // fsub
|
||||
instr = new WasmNumericInstruction( NumericOperator.sub, ValueType.f32, codePos );
|
||||
break;
|
||||
case 103: // dsub
|
||||
instr = new WasmNumericInstruction( NumericOperator.sub, ValueType.f64, codePos );
|
||||
break;
|
||||
case 104: // imul;
|
||||
instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.i32, codePos );
|
||||
break;
|
||||
case 105: // lmul
|
||||
instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.i64, codePos );
|
||||
break;
|
||||
case 106: // fmul
|
||||
instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.f32, codePos );
|
||||
break;
|
||||
case 107: // dmul
|
||||
instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.f64, codePos );
|
||||
break;
|
||||
case 108: // idiv
|
||||
instr = new WasmNumericInstruction( NumericOperator.div, ValueType.i32, codePos );
|
||||
break;
|
||||
case 109: // ldiv
|
||||
instr = new WasmNumericInstruction( NumericOperator.div, ValueType.i64, codePos );
|
||||
break;
|
||||
case 110: // fdiv
|
||||
instr = new WasmNumericInstruction( NumericOperator.div, ValueType.f32, codePos );
|
||||
break;
|
||||
case 111: // ddiv
|
||||
instr = new WasmNumericInstruction( NumericOperator.div, ValueType.f64, codePos );
|
||||
break;
|
||||
case 112: // irem
|
||||
instr = new WasmNumericInstruction( NumericOperator.rem, ValueType.i32, codePos );
|
||||
break;
|
||||
case 113: // lrem
|
||||
instr = new WasmNumericInstruction( NumericOperator.rem, ValueType.i64, codePos );
|
||||
break;
|
||||
case 114: // frem
|
||||
case 115: // drem
|
||||
//TODO can be implemented with a helper function like: (a - (long)(a / b) * (double)b)
|
||||
throw new WasmException( "Modulo/Remainder for floating numbers is not supported in WASM. Use int or long data types." + op, sourceFile, className, byteCode.getLineNumber() );
|
||||
case 116: // ineg
|
||||
instructions.add( new WasmConstInstruction( -1, ValueType.i32, codePos ) );
|
||||
instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.i32, codePos );
|
||||
break;
|
||||
case 117: // lneg
|
||||
instructions.add( new WasmConstInstruction( (long)-1, ValueType.i64, codePos ) ) ;
|
||||
instr = new WasmNumericInstruction( NumericOperator.mul, ValueType.i64, codePos );
|
||||
break;
|
||||
case 118: // fneg
|
||||
instr = new WasmNumericInstruction( NumericOperator.neg, ValueType.f32, codePos );
|
||||
break;
|
||||
case 119: // dneg
|
||||
instr = new WasmNumericInstruction( NumericOperator.neg, ValueType.f64, codePos );
|
||||
break;
|
||||
case 120: // ishl
|
||||
instr = new WasmNumericInstruction( NumericOperator.shl, ValueType.i32, codePos );
|
||||
break;
|
||||
case 121: // lshl
|
||||
instructions.add( new WasmConvertInstruction( ValueTypeConvertion.i2l, codePos ) ); // the shift parameter must be of type long!!!
|
||||
instr = new WasmNumericInstruction( NumericOperator.shl, ValueType.i64, codePos );
|
||||
break;
|
||||
case 122: // ishr
|
||||
instr = new WasmNumericInstruction( NumericOperator.shr_s, ValueType.i32, codePos );
|
||||
break;
|
||||
case 123: // lshr
|
||||
instructions.add( new WasmConvertInstruction( ValueTypeConvertion.i2l, codePos ) ); // the shift parameter must be of type long!!!
|
||||
instr = new WasmNumericInstruction( NumericOperator.shr_s, ValueType.i64, codePos );
|
||||
break;
|
||||
case 124: // iushr
|
||||
instr = new WasmNumericInstruction( NumericOperator.shr_u, ValueType.i32, codePos );
|
||||
break;
|
||||
case 125: // lushr
|
||||
instructions.add( new WasmConvertInstruction( ValueTypeConvertion.i2l, codePos ) ); // the shift parameter must be of type long!!!
|
||||
instr = new WasmNumericInstruction( NumericOperator.shr_u, ValueType.i64, codePos );
|
||||
break;
|
||||
case 126: // iand
|
||||
instr = new WasmNumericInstruction( NumericOperator.and, ValueType.i32, codePos );
|
||||
break;
|
||||
case 127: // land
|
||||
instr = new WasmNumericInstruction( NumericOperator.and, ValueType.i64, codePos );
|
||||
break;
|
||||
case 128: // ior
|
||||
instr = new WasmNumericInstruction( NumericOperator.or, ValueType.i32, codePos );
|
||||
break;
|
||||
case 129: // lor
|
||||
instr = new WasmNumericInstruction( NumericOperator.or, ValueType.i64, codePos );
|
||||
break;
|
||||
case 130: // ixor
|
||||
instr = new WasmNumericInstruction( NumericOperator.xor, ValueType.i32, codePos );
|
||||
break;
|
||||
case 131: // lxor
|
||||
instr = new WasmNumericInstruction( NumericOperator.xor, ValueType.i64, codePos );
|
||||
break;
|
||||
case 132: // iinc
|
||||
int idx = byteCode.readUnsignedByte();
|
||||
instructions.add( new WasmLoadStoreInstruction( true, idx, localVariables, codePos ) );
|
||||
instructions.add( new WasmConstInstruction( (int)byteCode.readByte(), ValueType.i32, codePos ) );
|
||||
instructions.add( new WasmNumericInstruction( NumericOperator.add, ValueType.i32, codePos) );
|
||||
instr = new WasmLoadStoreInstruction( false, idx, localVariables, codePos );
|
||||
break;
|
||||
case 133: // i2l
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.i2l, codePos );
|
||||
break;
|
||||
case 134: // i2f
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.i2f, codePos );
|
||||
break;
|
||||
case 135: // i2d
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.i2d, codePos );
|
||||
break;
|
||||
case 136: // l2i
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.l2i, codePos );
|
||||
break;
|
||||
case 137: // l2f
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.l2f, codePos );
|
||||
break;
|
||||
case 138: // l2d
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.l2d, codePos );
|
||||
break;
|
||||
case 139: // f2i
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.f2i, codePos );
|
||||
break;
|
||||
case 140: // f2l
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.f2l, codePos );
|
||||
break;
|
||||
case 141: // f2d
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.f2d, codePos );
|
||||
break;
|
||||
case 142: // d2i
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.d2i, codePos );
|
||||
break;
|
||||
case 143: // d2l
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.d2l, codePos );
|
||||
break;
|
||||
case 144: // d2f
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.d2f, codePos );
|
||||
break;
|
||||
case 145: // i2b
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.i2b, codePos );
|
||||
break;
|
||||
case 146: // i2c
|
||||
instructions.add( new WasmConstInstruction( 0xFFFF, ValueType.i32, codePos ) );
|
||||
instr = new WasmNumericInstruction( NumericOperator.and, ValueType.i32, codePos );
|
||||
break;
|
||||
case 147: // i2s
|
||||
instr = new WasmConvertInstruction( ValueTypeConvertion.i2s, codePos );
|
||||
break;
|
||||
case 148: // lcmp
|
||||
opCompare( ValueType.i64, byteCode, codePos );
|
||||
break;
|
||||
case 149: // fcmpl
|
||||
case 150: // fcmpg
|
||||
opCompare( ValueType.f32, byteCode, codePos );
|
||||
break;
|
||||
case 151: // dcmpl
|
||||
case 152: // dcmpg
|
||||
opCompare( ValueType.f64, byteCode, codePos );
|
||||
break;
|
||||
case 153: // ifeq
|
||||
opIfCondition( NumericOperator.eq, byteCode, codePos );
|
||||
break;
|
||||
case 154: // ifne
|
||||
opIfCondition( NumericOperator.ne, byteCode, codePos );
|
||||
break;
|
||||
case 155: // iflt
|
||||
opIfCondition( NumericOperator.lt, byteCode, codePos );
|
||||
break;
|
||||
case 156: // ifge
|
||||
opIfCondition( NumericOperator.ge, byteCode, codePos );
|
||||
break;
|
||||
case 157: // ifgt
|
||||
opIfCondition( NumericOperator.gt, byteCode, codePos );
|
||||
break;
|
||||
case 158: // ifle
|
||||
opIfCondition( NumericOperator.le, byteCode, codePos );
|
||||
break;
|
||||
case 159: // if_icmpeq
|
||||
opIfCompareCondition( NumericOperator.eq, byteCode, codePos );
|
||||
break;
|
||||
case 160: // if_icmpne
|
||||
opIfCompareCondition( NumericOperator.ne, byteCode, codePos );
|
||||
break;
|
||||
case 161: // if_icmplt
|
||||
opIfCompareCondition( NumericOperator.lt, byteCode, codePos );
|
||||
break;
|
||||
case 162: // if_icmpge
|
||||
opIfCompareCondition( NumericOperator.ge, byteCode, codePos );
|
||||
break;
|
||||
case 163: // if_icmpgt
|
||||
opIfCompareCondition( NumericOperator.gt, byteCode, codePos );
|
||||
break;
|
||||
case 164: // if_icmple
|
||||
opIfCompareCondition( NumericOperator.le, byteCode, codePos );
|
||||
break;
|
||||
//TODO case 165: // if_acmpeq
|
||||
//TODO case 166: // if_acmpne
|
||||
case 167: // goto
|
||||
int offset = byteCode.readShort();
|
||||
branchManager.addGotoOperator( codePos, offset, byteCode.getLineNumber() );
|
||||
instr = new WasmNopInstruction( codePos ); // marker of the line number for the branch manager
|
||||
break;
|
||||
//TODO case 168: // jsr
|
||||
//TODO case 169: // ret
|
||||
case 170: // tableswitch
|
||||
case 171: // lookupswitch
|
||||
writeSwitchCode( byteCode, op == 171 );
|
||||
break;
|
||||
case 172: // ireturn
|
||||
case 173: // lreturn
|
||||
case 174: // freturn
|
||||
case 175: // dreturn
|
||||
case 176: // areturn
|
||||
case 177: // return void
|
||||
ValueType type = null;
|
||||
switch ( op ) {
|
||||
case 172: // ireturn
|
||||
type = ValueType.i32;
|
||||
break;
|
||||
case 173: // lreturn
|
||||
type = ValueType.i64;
|
||||
break;
|
||||
case 174: // freturn
|
||||
type = ValueType.f32;
|
||||
break;
|
||||
case 175: // dreturn
|
||||
type = ValueType.f64;
|
||||
break;
|
||||
case 176: // areturn
|
||||
type = ValueType.anyref;
|
||||
break;
|
||||
}
|
||||
instr = new WasmBlockInstruction( WasmBlockOperator.RETURN, type, codePos );
|
||||
endWithReturn = true;
|
||||
break;
|
||||
case 178: // getstatic
|
||||
ConstantRef ref = (ConstantRef)constantPool.get( byteCode.readUnsignedShort() );
|
||||
instr = new WasmGlobalInstruction( true, ref, codePos );
|
||||
break;
|
||||
case 179: // putstatic
|
||||
ref = (ConstantRef)constantPool.get( byteCode.readUnsignedShort() );
|
||||
instr = new WasmGlobalInstruction( false, ref, codePos );
|
||||
break;
|
||||
//TODO case 180: // getfield
|
||||
//TODO case 181: // putfield
|
||||
//TODO case 182: // invokevirtual
|
||||
//TODO case 183: // invokespecial
|
||||
case 184: // invokestatic
|
||||
idx = byteCode.readUnsignedShort();
|
||||
ref = (ConstantRef)constantPool.get( idx );
|
||||
instr = new WasmCallInstruction( ref, codePos );
|
||||
break;
|
||||
//TODO case 185: // invokeinterface
|
||||
//TODO case 186: // invokedynamic
|
||||
//TODO case 187: // new
|
||||
//TODO case 188: // newarray
|
||||
//TODO case 189: // anewarray
|
||||
//TODO case 190: // arraylength
|
||||
//TODO case 191: // athrow
|
||||
//TODO case 192: // checkcast
|
||||
//TODO case 193: // instanceof
|
||||
//TODO case 194: // monitorenter
|
||||
//TODO case 195: // monitorexit
|
||||
//TODO case 196: // wide
|
||||
//TODO case 197: // multianewarray
|
||||
//TODO case 198: // ifnull
|
||||
//TODO case 199: // ifnonnull
|
||||
//TODO case 200: // goto_w
|
||||
//TODO case 201: // jsr_w
|
||||
default:
|
||||
throw new WasmException( "Unimplemented Java byte code operation: " + op, sourceFile, className, byteCode.getLineNumber() );
|
||||
}
|
||||
if( instr != null ) {
|
||||
instructions.add( instr );
|
||||
}
|
||||
}
|
||||
branchManager.calculate();
|
||||
branchManager.handle( byteCode ); // add branch operations
|
||||
if( !endWithReturn && returnType != null ) {
|
||||
// if a method ends with a loop without a break then code after the loop is no reachable
|
||||
// Java does not need a return byte code in this case
|
||||
// But WebAssembly need the dead code to validate
|
||||
instructions.add( new WasmBlockInstruction( WasmBlockOperator.UNREACHABLE, null, byteCode.getCodePosition() ) );
|
||||
}
|
||||
} catch( WasmException ex ) {
|
||||
throw ex;
|
||||
} catch( Exception ex ) {
|
||||
throw WasmException.create( ex, sourceFile, className, byteCode.getLineNumber() );
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Write the both switch operation codes
|
||||
*
|
||||
* @param byteCode
|
||||
* the current stream with a position after the operation code
|
||||
* @param isLookupSwitch
|
||||
* true, if the operation was a loopupswitch; false, if the operation was a tableswitch
|
||||
* @throws IOException
|
||||
* if any I/O error occur
|
||||
*/
|
||||
private void writeSwitchCode( CodeInputStream byteCode, boolean isLookupSwitch ) throws IOException {
|
||||
int lineNumber = byteCode.getLineNumber();
|
||||
int codePos = byteCode.getCodePosition();
|
||||
int startPosition = codePos;
|
||||
int padding = startPosition % 4;
|
||||
if( padding > 0 ) {
|
||||
byteCode.skip( 4 - padding );
|
||||
}
|
||||
startPosition--;
|
||||
int switchValuestartPosition = findPreviousPushCodePosition();
|
||||
|
||||
int defaultPosition = startPosition + byteCode.readInt();
|
||||
int[] keys;
|
||||
int[] positions;
|
||||
if( isLookupSwitch ) { // lookupswitch
|
||||
int count = byteCode.readInt();
|
||||
keys = new int[count];
|
||||
positions = new int[count];
|
||||
for( int i = 0; i < count; i++ ) {
|
||||
keys[i] = byteCode.readInt();
|
||||
positions[i] = startPosition + byteCode.readInt();
|
||||
}
|
||||
int tempI32 = localVariables.getTempI32();
|
||||
int block = 0;
|
||||
int defaultBlock = -1;
|
||||
int currentPos = -1;
|
||||
instructions.add( new WasmLoadStoreInstruction( false, tempI32, localVariables, codePos ) );
|
||||
do {
|
||||
int nextPos = findNext( currentPos, positions );
|
||||
if( nextPos == currentPos ) {
|
||||
break;
|
||||
}
|
||||
currentPos = nextPos;
|
||||
if( defaultBlock < 0 ) {
|
||||
if( defaultPosition <= currentPos ) {
|
||||
defaultBlock = block;
|
||||
if( defaultPosition < currentPos ) {
|
||||
block++;
|
||||
}
|
||||
}
|
||||
}
|
||||
for( int i = 0; i < positions.length; i++ ) {
|
||||
if( positions[i] == currentPos ) {
|
||||
instructions.add( new WasmLoadStoreInstruction( true, tempI32, localVariables, codePos ) );
|
||||
instructions.add( new WasmConstInstruction( keys[i], ValueType.i32, codePos ) );
|
||||
instructions.add( new WasmNumericInstruction( NumericOperator.eq, ValueType.i32, codePos ) );
|
||||
instructions.add( new WasmBlockInstruction( WasmBlockOperator.BR_IF, block, codePos ) );
|
||||
}
|
||||
}
|
||||
block++;
|
||||
} while( true );
|
||||
if( defaultBlock < 0 ) {
|
||||
defaultBlock = block;
|
||||
}
|
||||
instructions.add( new WasmBlockInstruction( WasmBlockOperator.BR, defaultBlock, codePos ) );
|
||||
} else {
|
||||
int low = byteCode.readInt();
|
||||
keys = null;
|
||||
int count = byteCode.readInt() - low + 1;
|
||||
positions = new int[count];
|
||||
for( int i = 0; i < count; i++ ) {
|
||||
positions[i] = startPosition + byteCode.readInt();
|
||||
}
|
||||
if( low != 0 ) { // the br_table starts ever with the value 0. That we need to subtract the start value if it different
|
||||
instructions.add( new WasmConstInstruction( low, ValueType.i32, codePos ) );
|
||||
instructions.add( new WasmNumericInstruction( NumericOperator.sub, ValueType.i32, codePos ) );
|
||||
}
|
||||
}
|
||||
branchManager.addSwitchOperator( switchValuestartPosition, 0, lineNumber, keys, positions, defaultPosition );
|
||||
}
|
||||
|
||||
/**
|
||||
* We need one value from the stack inside of a block. We need to find the code position on which the block can
|
||||
* start. If this a function call or numeric expression this can be complex to find the right point.
|
||||
*
|
||||
* @return the code position
|
||||
*/
|
||||
private int findPreviousPushCodePosition() {
|
||||
int valueCount = 0;
|
||||
for( int i = instructions.size() - 1; i >= 0; i-- ) {
|
||||
WasmInstruction instr = instructions.get( i );
|
||||
ValueType valueType = instr.getPushValueType();
|
||||
if( valueType != null ) {
|
||||
valueCount++;
|
||||
}
|
||||
valueCount -= instr.getPopCount();
|
||||
if( valueCount == 1 ) {
|
||||
return instr.getCodePosition();
|
||||
}
|
||||
}
|
||||
throw new WasmException( "Switch start position not found", sourceFile, className, -1 ); // should never occur
|
||||
}
|
||||
|
||||
/**
|
||||
* Find the next higher value.
|
||||
*
|
||||
* @param current
|
||||
* the current value
|
||||
* @param values
|
||||
* the unordered list of values
|
||||
* @return the next value or current value if not found.
|
||||
*/
|
||||
private static int findNext( int current, int[] values ) {
|
||||
boolean find = false;
|
||||
int next = Integer.MAX_VALUE;
|
||||
for( int val : values ) {
|
||||
if( val > current && val <= next ) {
|
||||
next = val;
|
||||
find = true;
|
||||
}
|
||||
}
|
||||
return find ? next : current;
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a WasmLoadStoreInstruction.
|
||||
*
|
||||
* @param valueType
|
||||
* the value type
|
||||
* @param load
|
||||
* true: if load
|
||||
* @param idx
|
||||
* the memory/slot idx of the variable
|
||||
* @param codePos
|
||||
* the code position/offset in the Java method
|
||||
* @return the WasmLoadStoreInstruction
|
||||
*/
|
||||
@Nonnull
|
||||
private WasmLoadStoreInstruction loadStore( ValueType valueType, boolean load, @Nonnegative int idx, int codePos ) {
|
||||
localVariables.use( valueType, idx );
|
||||
return new WasmLoadStoreInstruction( load, idx, localVariables, codePos );
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle the if<condition> of the Java byte code. This Java instruction compare the first stack value with value 0.
|
||||
* Important: In the Java IF expression the condition for the jump to the else block is saved. In WebAssembler we
|
||||
* need to use condition for the if block. The caller of the method must already negate this
|
||||
* @param compareOp
|
||||
* The condition for the continue of a loop.
|
||||
* @param byteCode
|
||||
* current byte code stream to read the target offset.
|
||||
* @param codePos
|
||||
* the code position/offset in the Java method
|
||||
*
|
||||
* @throws IOException
|
||||
* if any I/O errors occur.
|
||||
*/
|
||||
private void opIfCondition( NumericOperator compareOp, CodeInputStream byteCode, int codePos ) throws IOException {
|
||||
instructions.add( new WasmConstInstruction( 0, ValueType.i32, codePos ) );
|
||||
opIfCompareCondition( compareOp, byteCode, codePos );
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle the if<condition> of the Java byte code. This Java instruction compare 2 values from stack.
|
||||
* Important: In the Java IF expression the condition for the jump to the else block is saved. In WebAssembler we need to use
|
||||
* condition for the if block. The caller of the method must already negate this.
|
||||
* @param compareOp
|
||||
* The condition for the continue of a loop.
|
||||
* @param byteCode
|
||||
* current byte code stream to read the target offset.
|
||||
* @param codePos
|
||||
* the code position/offset in the Java method
|
||||
*
|
||||
* @throws IOException
|
||||
* if any I/O errors occur.
|
||||
*/
|
||||
private void opIfCompareCondition( NumericOperator compareOp, CodeInputStream byteCode, int codePos ) throws IOException {
|
||||
int offset = byteCode.readShort();
|
||||
WasmNumericInstruction compare = new WasmNumericInstruction( compareOp, ValueType.i32, codePos );
|
||||
branchManager.addIfOperator( codePos, offset, byteCode.getLineNumber(), compare );
|
||||
instructions.add( compare );
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle the different compare operator. The compare operator returns the integer values -1, 0 or 1. There is no
|
||||
* equivalent in WebAssembly. That we need to read the next operation to find an equivalent.
|
||||
*
|
||||
* @param valueType
|
||||
* the value type of the compared
|
||||
* @param byteCode
|
||||
* current byte code stream to read the next operation.
|
||||
* @param codePos
|
||||
* the code position/offset in the Java method
|
||||
* @throws IOException
|
||||
* if any I/O errors occur.
|
||||
*/
|
||||
private void opCompare( ValueType valueType, CodeInputStream byteCode, int codePos ) throws IOException {
|
||||
codePos = byteCode.getCodePosition();
|
||||
NumericOperator numOp;
|
||||
int nextOp = byteCode.read();
|
||||
switch( nextOp ){
|
||||
case 153: // ifeq
|
||||
numOp = NumericOperator.eq;
|
||||
break;
|
||||
case 154: // ifne
|
||||
numOp = NumericOperator.ne;
|
||||
break;
|
||||
case 155: // iflt
|
||||
numOp = NumericOperator.lt;
|
||||
break;
|
||||
case 156: // ifge
|
||||
numOp = NumericOperator.ge;
|
||||
break;
|
||||
case 157: // ifgt
|
||||
numOp = NumericOperator.gt;
|
||||
break;
|
||||
case 158: // ifle
|
||||
numOp = NumericOperator.le;
|
||||
break;
|
||||
default:
|
||||
throw new WasmException( "Unexpected compare sub operation: " + nextOp, sourceFile, className, -1 );
|
||||
}
|
||||
int offset = byteCode.readShort();
|
||||
WasmNumericInstruction compare = new WasmNumericInstruction( numOp, valueType, codePos );
|
||||
branchManager.addIfOperator( codePos, offset, byteCode.getLineNumber(), compare );
|
||||
instructions.add( compare );
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
43
src/de/inetsoftware/jwebassembly/module/WasmCodeBuilder.java
Normal file
43
src/de/inetsoftware/jwebassembly/module/WasmCodeBuilder.java
Normal file
@ -0,0 +1,43 @@
|
||||
/*
|
||||
* Copyright 2018 Volker Berlin (i-net software)
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
package de.inetsoftware.jwebassembly.module;
|
||||
|
||||
import java.util.List;
|
||||
|
||||
/**
|
||||
* Base class for Code Building.
|
||||
*
|
||||
* @author Volker Berlin
|
||||
*/
|
||||
public abstract class WasmCodeBuilder {
|
||||
|
||||
/**
|
||||
* Get the list of instructions
|
||||
*
|
||||
* @return the list
|
||||
*/
|
||||
abstract List<WasmInstruction> getInstructions();
|
||||
|
||||
/**
|
||||
* Get the data types of the local variables. The value is only valid until the next call.
|
||||
*
|
||||
* @param paramCount
|
||||
* the count of method parameter which should be exclude
|
||||
* @return the reused list with fresh values
|
||||
*/
|
||||
abstract List<ValueType> getLocalTypes( int paramCount );
|
||||
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user