com.codename1.tools.translator.bytecodes.Jump Maven / Gradle / Ivy
/*
* Copyright (c) 2012, Codename One and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Codename One designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Codename One through http://www.codenameone.com/ if you
* need additional information or have any questions.
*/
package com.codename1.tools.translator.bytecodes;
import java.util.List;
import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
/**
*
* @author Shai Almog
*/
public class Jump extends Instruction {
private static int jsrCounter = 1;
private Label label;
public Jump(int opcode, Label label) {
super(opcode);
this.label = label;
LabelInstruction.labelIsUsed(label);
}
@Override
public void appendInstruction(StringBuilder b, List instructions) {
b.append(" ");
switch(opcode) {
case Opcodes.IFEQ:
b.append("if(POP_INT() == 0) /* IFEQ */ ");
break;
case Opcodes.IFNE:
b.append("if(POP_INT() != 0) /* IFNE */ ");
break;
case Opcodes.IFLT:
b.append("if(POP_INT() < 0) /* IFLT */ ");
break;
case Opcodes.IFGE:
b.append("if(POP_INT() >= 0) /* IFGE */ ");
break;
case Opcodes.IFGT:
b.append("if(POP_INT() > 0) /* IFGT */ ");
break;
case Opcodes.IFLE:
b.append("if(POP_INT() <= 0) /* IFLE */ ");
break;
case Opcodes.IF_ICMPEQ:
b.append("SP-=2; if((*SP).data.i == SP[1].data.i) /* IF_ICMPEQ */ ");
break;
case Opcodes.IF_ICMPNE:
b.append("SP-=2; if((*SP).data.i != SP[1].data.i) /* IF_ICMPNE */ ");
break;
case Opcodes.IF_ICMPLT:
b.append("SP-=2; if((*SP).data.i < SP[1].data.i) /* IF_ICMPLT */ ");
break;
case Opcodes.IF_ICMPGE:
b.append("SP-=2; if((*SP).data.i >= SP[1].data.i) /* IF_ICMPGE */ ");
break;
case Opcodes.IF_ICMPGT:
b.append("SP-=2; if((*SP).data.i > SP[1].data.i) /* IF_ICMPGT */ ");
break;
case Opcodes.IF_ICMPLE:
b.append("SP-=2; if((*SP).data.i <= SP[1].data.i) /* IF_ICMPLE */ ");
break;
case Opcodes.IF_ACMPEQ:
b.append("SP-=2; if((*SP).data.o == SP[1].data.o) /* IF_ACMPEQ */ ");
break;
case Opcodes.IF_ACMPNE:
b.append("SP-=2; if((*SP).data.o != SP[1].data.o) /* IF_ACMPNE */ ");
break;
case Opcodes.GOTO:
// this space intentionally left blank
break;
case Opcodes.JSR:
b.append("/* JSR TODO */");
/*b.append("PUSH_")
b.append("goto label_");
b.append(label.toString());
b.append(";\n");
b.append("JSR_RETURN_LABEL_");
b.append(jsrCounter);
b.append(":");
jsrCounter++;*/
return;
case Opcodes.IFNULL:
b.append("if(POP_OBJ() == JAVA_NULL) /* IFNULL */ ");
break;
case Opcodes.IFNONNULL:
b.append("if(POP_OBJ() != JAVA_NULL) /* IFNONNULL */ ");
break;
}
if(TryCatch.isTryCatchInMethod()) {
b.append("JUMP_TO(label_");
b.append(label.toString());
b.append(", ");
b.append(LabelInstruction.getLabelCatchDepth(label, instructions));
b.append(");\n");
} else {
b.append("goto label_");
b.append(label.toString());
b.append(";\n");
}
}
Label getLabel() {
return label;
}
}