| /* |
| * 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 NotEqualExpression extends BinaryEqualityExpression { |
| /** |
| * constructor |
| */ |
| public NotEqualExpression(long where, Expression left, Expression right) { |
| super(NE, 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 NotEqualExpression(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_icmpne : opc_if_icmpeq, 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_ifnonnull : opc_ifnull, lbl, whenTrue); |
| } else { |
| right.codeValue(env, ctx, asm); |
| asm.add(where, whenTrue ? opc_if_acmpne : opc_if_acmpeq, lbl, whenTrue); |
| } |
| return; |
| default: |
| throw new CompilerError("Unexpected Type"); |
| } |
| asm.add(where, whenTrue ? opc_ifne : opc_ifeq, lbl, whenTrue); |
| } |
| } |