/*
* @(#)ShiftLeftExpression.java 1.9 95/09/14 Arthur van Hoff
*
* Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for NON-COMMERCIAL purposes and without
* fee is hereby granted provided that this copyright notice
* appears in all copies. Please refer to the file "copyright.html"
* for further important copyright and licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
* THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
*/
package sun.tools.tree;
import sun.tools.java.*;
import sun.tools.asm.Assembler;
public
class ShiftLeftExpression extends BinaryShiftExpression {
/**
* constructor
*/
public ShiftLeftExpression(int where, Expression left, Expression right) {
super(LSHIFT, where, left, right);
}
/**
* Evaluate
*/
Expression eval(int a, int b) {
return new IntExpression(where, a << b);
}
Expression eval(long a, long b) {
return new LongExpression(where, a << b);
}
/**
* Simplify
*/
Expression simplify() {
if (left.equals(0) || right.equals(0)) {
return left;
}
return this;
}
/**
* Code
*/
void codeOperation(Environment env, Context ctx, Assembler asm) {
asm.add(where, opc_ishl + type.getTypeCodeOffset());
}
}