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Declarative Machine Learning
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.sysml.runtime.instructions.cp;
import org.apache.sysml.parser.Expression.ValueType;
import org.apache.sysml.runtime.DMLRuntimeException;
import org.apache.sysml.runtime.controlprogram.context.ExecutionContext;
import org.apache.sysml.runtime.functionobjects.Divide;
import org.apache.sysml.runtime.functionobjects.Power;
import org.apache.sysml.runtime.matrix.operators.BinaryOperator;
import org.apache.sysml.runtime.matrix.operators.Operator;
public class ScalarScalarArithmeticCPInstruction extends ArithmeticBinaryCPInstruction
{
public ScalarScalarArithmeticCPInstruction(Operator op,
CPOperand in1,
CPOperand in2,
CPOperand out,
String opcode,
String istr){
super(op, in1, in2, out, opcode, istr);
}
@Override
public void processInstruction(ExecutionContext ec) throws DMLRuntimeException{
// 1) Obtain data objects associated with inputs
ScalarObject so1 = ec.getScalarInput(input1.getName(), input1.getValueType(), input1.isLiteral());
ScalarObject so2 = ec.getScalarInput(input2.getName(), input2.getValueType(), input2.isLiteral() );
ScalarObject sores = null;
// 2) Compute the result value & make an appropriate data object
BinaryOperator dop = (BinaryOperator) _optr;
if ( input1.getValueType() == ValueType.STRING
|| input2.getValueType() == ValueType.STRING )
{
//pre-check (for robustness regarding too long strings)
String val1 = so1.getStringValue();
String val2 = so2.getStringValue();
StringObject.checkMaxStringLength(val1.length() + val2.length());
String rval = dop.fn.execute(val1, val2);
sores = (ScalarObject) new StringObject(rval);
}
else if ( so1 instanceof IntObject && so2 instanceof IntObject ) {
if ( dop.fn instanceof Divide || dop.fn instanceof Power ) {
// If both inputs are of type INT then output must be an INT if operation is not divide or power
double rval = dop.fn.execute ( so1.getLongValue(), so2.getLongValue() );
sores = (ScalarObject) new DoubleObject(rval);
}
else {
// If both inputs are of type INT then output must be an INT if operation is not divide or power
double tmpVal = dop.fn.execute ( so1.getLongValue(), so2.getLongValue() );
//cast to long if no overflow, otherwise controlled exception
if( tmpVal > Long.MAX_VALUE )
throw new DMLRuntimeException("Integer operation created numerical result overflow ("+tmpVal+" > "+Long.MAX_VALUE+").");
long rval = (long) tmpVal;
sores = (ScalarObject) new IntObject(rval);
}
}
else {
// If either of the input is of type DOUBLE then output is a DOUBLE
double rval = dop.fn.execute ( so1.getDoubleValue(), so2.getDoubleValue() );
sores = (ScalarObject) new DoubleObject(rval);
}
// 3) Put the result value into ProgramBlock
ec.setScalarOutput(output.getName(), sores);
}
}