/*
* @(#)NegativeExpression.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 NegativeExpression extends UnaryExpression {
/**
* Constructor
*/
public NegativeExpression(int where, Expression right) {
super(NEG, where, right.type, right);
}
/**
* Select the type of the expression
*/
void selectType(Environment env, Context ctx, int tm) {
if ((tm & TM_DOUBLE) != 0) {
type = Type.tDouble;
} else if ((tm & TM_FLOAT) != 0) {
type = Type.tFloat;
} else if ((tm & TM_LONG) != 0) {
type = Type.tLong;
} else {
type = Type.tInt;
}
right = convert(env, ctx, type, right);
}
/**
* Evaluate
*/
Expression eval(int a) {
return new IntExpression(where, -a);
}
Expression eval(long a) {
return new LongExpression(where, -a);
}
Expression eval(float a) {
return new FloatExpression(where, -a);
}
Expression eval(double a) {
return new DoubleExpression(where, -a);
}
/**
* Simplify
*/
Expression simplify() {
if (right.op == NEG) {
return ((NegativeExpression)right).right;
}
return this;
}
/**
* Code
*/
public void codeValue(Environment env, Context ctx, Assembler asm) {
right.codeValue(env, ctx, asm);
asm.add(where, opc_ineg + type.getTypeCodeOffset());
}
}