/* * Copyright (c) 1994, 2003, Oracle 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. Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.tools.tree; import sun.tools.java.*;import sun.tools.asm.Assembler;import sun.tools.asm.Label; /** * WARNING: The contents of this source file are not part of any * supported API. Code that depends on them does so at its own risk: * they are subject to change or removal without notice. */publicclass EqualExpression extends BinaryEqualityExpression { /** * constructor */ public EqualExpression(long where, Expression left, Expression right) { super(EQ, where, left, right); } /** * Evaluate */ Expression eval(int a, int b) { return new BooleanExpression(where, a == b); } Expression eval(long a, long b) { return new BooleanExpression(where, a == b); } Expression eval(float a, float b) { return new BooleanExpression(where, a == b); } Expression eval(double a, double b) { return new BooleanExpression(where, a == b); } Expression eval(boolean a, boolean b) { return new BooleanExpression(where, a == b); } /** * Simplify */ Expression simplify() { if (left.isConstant() && !right.isConstant()) { return new EqualExpression(where, right, left); } return this; } /** * Code */ void codeBranch(Environment env, Context ctx, Assembler asm, Label lbl, boolean whenTrue) { left.codeValue(env, ctx, asm); switch (left.type.getTypeCode()) { case TC_BOOLEAN: case TC_INT: if (!right.equals(0)) { right.codeValue(env, ctx, asm); asm.add(where, whenTrue ? opc_if_icmpeq : opc_if_icmpne, lbl, whenTrue); return; } break; case TC_LONG: right.codeValue(env, ctx, asm); asm.add(where, opc_lcmp); break; case TC_FLOAT: right.codeValue(env, ctx, asm); asm.add(where, opc_fcmpl); break; case TC_DOUBLE: right.codeValue(env, ctx, asm); asm.add(where, opc_dcmpl); break; case TC_ARRAY: case TC_CLASS: case TC_NULL: if (right.equals(0)) { asm.add(where, whenTrue ? opc_ifnull : opc_ifnonnull, lbl, whenTrue); } else { right.codeValue(env, ctx, asm); asm.add(where, whenTrue ? opc_if_acmpeq : opc_if_acmpne, lbl, whenTrue); } return; default: throw new CompilerError("Unexpected Type"); } asm.add(where, whenTrue ? opc_ifeq : opc_ifne, lbl, whenTrue); }}
/*
* Copyright (c) 1994, 2003, Oracle 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. Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.tools.tree;
import sun.tools.java.*;
import sun.tools.asm.Assembler;
import sun.tools.asm.Label;
/**
* WARNING: The contents of this source file are not part of any
* supported API. Code that depends on them does so at its own risk:
* they are subject to change or removal without notice.
*/
public
class EqualExpression extends BinaryEqualityExpression {
/**
* constructor
*/
public EqualExpression(long where, Expression left, Expression right) {
super(EQ, where, left, right);
}
/**
* Evaluate
*/
Expression eval(int a, int b) {
return new BooleanExpression(where, a == b);
}
Expression eval(long a, long b) {
return new BooleanExpression(where, a == b);
}
Expression eval(float a, float b) {
return new BooleanExpression(where, a == b);
}
Expression eval(double a, double b) {
return new BooleanExpression(where, a == b);
}
Expression eval(boolean a, boolean b) {
return new BooleanExpression(where, a == b);
}
/**
* Simplify
*/
Expression simplify() {
if (left.isConstant() && !right.isConstant()) {
return new EqualExpression(where, right, left);
}
return this;
}
/**
* Code
*/
void codeBranch(Environment env, Context ctx, Assembler asm, Label lbl, boolean whenTrue) {
left.codeValue(env, ctx, asm);
switch (left.type.getTypeCode()) {
case TC_BOOLEAN:
case TC_INT:
if (!right.equals(0)) {
right.codeValue(env, ctx, asm);
asm.add(where, whenTrue ? opc_if_icmpeq : opc_if_icmpne, lbl, whenTrue);
return;
}
break;
case TC_LONG:
right.codeValue(env, ctx, asm);
asm.add(where, opc_lcmp);
break;
case TC_FLOAT:
right.codeValue(env, ctx, asm);
asm.add(where, opc_fcmpl);
break;
case TC_DOUBLE:
right.codeValue(env, ctx, asm);
asm.add(where, opc_dcmpl);
break;
case TC_ARRAY:
case TC_CLASS:
case TC_NULL:
if (right.equals(0)) {
asm.add(where, whenTrue ? opc_ifnull : opc_ifnonnull, lbl, whenTrue);
} else {
right.codeValue(env, ctx, asm);
asm.add(where, whenTrue ? opc_if_acmpeq : opc_if_acmpne, lbl, whenTrue);
}
return;
default:
throw new CompilerError("Unexpected Type");
}
asm.add(where, whenTrue ? opc_ifeq : opc_ifne, lbl, whenTrue);
}
}