Showing the changes to java/pkg/sun/tools/tree/SubtractExpression.java (1 of 18352 files). Show all
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| 1 | /* | ||
| 2 | * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.tools.tree; | ||
| 27 | |||
| 28 | import sun.tools.java.*; | ||
| 29 | import sun.tools.asm.Assembler; | ||
| 30 | |||
| 31 | /** | ||
| 32 | * WARNING: The contents of this source file are not part of any | ||
| 33 | * supported API. Code that depends on them does so at its own risk: | ||
| 34 | * they are subject to change or removal without notice. | ||
| 35 | */ | ||
| 36 | public | ||
| 37 | class SubtractExpression extends BinaryArithmeticExpression { | ||
| 38 | /** | ||
| 39 | * constructor | ||
| 40 | */ | ||
| 41 | public SubtractExpression(long where, Expression left, Expression right) { | ||
| 42 | super(SUB, where, left, right); | ||
| 43 | } | ||
| 44 | |||
| 45 | /** | ||
| 46 | * Evaluate | ||
| 47 | */ | ||
| 48 | Expression eval(int a, int b) { | ||
| 49 | return new IntExpression(where, a - b); | ||
| 50 | } | ||
| 51 | Expression eval(long a, long b) { | ||
| 52 | return new LongExpression(where, a - b); | ||
| 53 | } | ||
| 54 | Expression eval(float a, float b) { | ||
| 55 | return new FloatExpression(where, a - b); | ||
| 56 | } | ||
| 57 | Expression eval(double a, double b) { | ||
| 58 | return new DoubleExpression(where, a - b); | ||
| 59 | } | ||
| 60 | |||
| 61 | /** | ||
| 62 | * Simplify | ||
| 63 | */ | ||
| 64 | Expression simplify() { | ||
| 65 | // Can't simplify floating point subtract because of -0.0 strangeness | ||
| 66 | if (type.inMask(TM_INTEGER)) { | ||
| 67 | if (left.equals(0)) { | ||
| 68 | return new NegativeExpression(where, right); | ||
| 69 | } | ||
| 70 | if (right.equals(0)) { | ||
| 71 | return left; | ||
| 72 | } | ||
| 73 | } | ||
| 74 | return this; | ||
| 75 | } | ||
| 76 | |||
| 77 | /** | ||
| 78 | * Code | ||
| 79 | */ | ||
| 80 | void codeOperation(Environment env, Context ctx, Assembler asm) { | ||
| 81 | asm.add(where, opc_isub + type.getTypeCodeOffset()); | ||
| 82 | } | ||
| 83 | } | ||