Groovy example source code file (BinaryFloatExpressionHelper.java)

This example Groovy source code file (BinaryFloatExpressionHelper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

binaryfloatexpressionhelper, binaryfloatexpressionhelper, classnode, div, fadd, fcmpg, fmul, frem, groovybugerror, groovybugerror, intdiv, methodcaller, methodcaller, mod

The Groovy BinaryFloatExpressionHelper.java source code

/*
 * Copyright 2003-2010 the original author or authors.
 *
 * 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 org.codehaus.groovy.classgen.asm;

import static org.objectweb.asm.Opcodes.*;

import org.codehaus.groovy.GroovyBugError;
import org.codehaus.groovy.ast.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.runtime.BytecodeInterface8;
import org.objectweb.asm.MethodVisitor;

/**
 * @author <a href="mailto:blackdrag@gmx.org">Jochen "blackdrag" Theodorou
 */
public class BinaryFloatExpressionHelper extends BinaryExpressionWriter {

    public BinaryFloatExpressionHelper(WriterController controller) {
        super(controller);
    }
    
    protected void doubleTwoOperands(MethodVisitor mv) {
        mv.visitInsn(DUP2);
    }

    private static final MethodCaller 
        floatArrayGet = MethodCaller.newStatic(BytecodeInterface8.class, "fArrayGet"),
        floatArraySet = MethodCaller.newStatic(BytecodeInterface8.class, "fArraySet");

    
    protected MethodCaller getArrayGetCaller() {
        return floatArrayGet;
    }
    
    protected MethodCaller getArraySetCaller() {
        return floatArraySet;
    }
    
    protected boolean writeBitwiseOp(int type, boolean simulate) {
        if (!simulate) throw new GroovyBugError("should not reach here");
        return false;   
    }    
    
    protected int getBitwiseOperationBytecode(int type) {
        return -1;
    }
    
    protected int getCompareCode() {
        return FCMPG;
    }
    
    protected ClassNode getNormalOpResultType() {
        return ClassHelper.float_TYPE;
    }
    
    protected boolean writeShiftOp(int type, boolean simulate) {
        if (!simulate) throw new GroovyBugError("should not reach here");
        return false;   
    }    
    
    protected int getShiftOperationBytecode(int type) {
        return -1;
    }

    private static final int[] stdOperations = {
        FADD,           //  PLUS        200
        FSUB,           //  MINUS       201
        FMUL,           //  MULTIPLY    202
        0,              //  DIV, (203) but we don't want that one
        FDIV,           //  INTDIV      204
        FREM,           //  MOD         203
    };    
    
    protected int getStandardOperationBytecode(int type) {
        return stdOperations[type];
    }
    
    protected void removeTwoOperands(MethodVisitor mv) {
        mv.visitInsn(POP2);
    }
    
    protected void writeMinusMinus(MethodVisitor mv) {
        mv.visitInsn(FCONST_1);
        mv.visitInsn(FSUB);
    }
    
    protected void writePlusPlus(MethodVisitor mv) {
        mv.visitInsn(FCONST_1);
        mv.visitInsn(FADD);
    }

}