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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 | import sun.tools.asm.Label; | ||
| 31 | |||
| 32 | /** | ||
| 33 | * WARNING: The contents of this source file are not part of any | ||
| 34 | * supported API. Code that depends on them does so at its own risk: | ||
| 35 | * they are subject to change or removal without notice. | ||
| 36 | */ | ||
| 37 | public | ||
| 38 | class LessExpression extends BinaryCompareExpression { | ||
| 39 | /** | ||
| 40 | * constructor | ||
| 41 | */ | ||
| 42 | public LessExpression(long where, Expression left, Expression right) { | ||
| 43 | super(LT, where, left, right); | ||
| 44 | } | ||
| 45 | |||
| 46 | /** | ||
| 47 | * Evaluate | ||
| 48 | */ | ||
| 49 | Expression eval(int a, int b) { | ||
| 50 | return new BooleanExpression(where, a < b); | ||
| 51 | } | ||
| 52 | Expression eval(long a, long b) { | ||
| 53 | return new BooleanExpression(where, a < b); | ||
| 54 | } | ||
| 55 | Expression eval(float a, float b) { | ||
| 56 | return new BooleanExpression(where, a < b); | ||
| 57 | } | ||
| 58 | Expression eval(double a, double b) { | ||
| 59 | return new BooleanExpression(where, a < b); | ||
| 60 | } | ||
| 61 | |||
| 62 | /** | ||
| 63 | * Simplify | ||
| 64 | */ | ||
| 65 | Expression simplify() { | ||
| 66 | if (left.isConstant() && !right.isConstant()) { | ||
| 67 | return new GreaterExpression(where, right, left); | ||
| 68 | } | ||
| 69 | return this; | ||
| 70 | } | ||
| 71 | |||
| 72 | /** | ||
| 73 | * Code | ||
| 74 | */ | ||
| 75 | void codeBranch(Environment env, Context ctx, Assembler asm, Label lbl, boolean whenTrue) { | ||
| 76 | left.codeValue(env, ctx, asm); | ||
| 77 | switch (left.type.getTypeCode()) { | ||
| 78 | case TC_INT: | ||
| 79 | if (!right.equals(0)) { | ||
| 80 | right.codeValue(env, ctx, asm); | ||
| 81 | asm.add(where, whenTrue ? opc_if_icmplt : opc_if_icmpge, lbl, whenTrue); | ||
| 82 | return; | ||
| 83 | } | ||
| 84 | break; | ||
| 85 | case TC_LONG: | ||
| 86 | right.codeValue(env, ctx, asm); | ||
| 87 | asm.add(where, opc_lcmp); | ||
| 88 | break; | ||
| 89 | case TC_FLOAT: | ||
| 90 | right.codeValue(env, ctx, asm); | ||
| 91 | asm.add(where, opc_fcmpg); | ||
| 92 | break; | ||
| 93 | case TC_DOUBLE: | ||
| 94 | right.codeValue(env, ctx, asm); | ||
| 95 | asm.add(where, opc_dcmpg); | ||
| 96 | break; | ||
| 97 | default: | ||
| 98 | throw new CompilerError("Unexpected Type"); | ||
| 99 | } | ||
| 100 | asm.add(where, whenTrue ? opc_iflt : opc_ifge, lbl, whenTrue); | ||
| 101 | } | ||
| 102 | } | ||