| /* |
| * Copyright (c) 2010, 2013, 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 jdk.nashorn.internal.codegen.types; |
| |
| import static jdk.internal.org.objectweb.asm.Opcodes.I2D; |
| import static jdk.internal.org.objectweb.asm.Opcodes.I2L; |
| import static jdk.internal.org.objectweb.asm.Opcodes.IADD; |
| import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_0; |
| import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_1; |
| import static jdk.internal.org.objectweb.asm.Opcodes.ILOAD; |
| import static jdk.internal.org.objectweb.asm.Opcodes.IRETURN; |
| import static jdk.internal.org.objectweb.asm.Opcodes.ISTORE; |
| import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup; |
| import static jdk.nashorn.internal.runtime.JSType.UNDEFINED_INT; |
| import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT; |
| |
| import jdk.internal.org.objectweb.asm.MethodVisitor; |
| import jdk.nashorn.internal.codegen.CompilerConstants; |
| |
| /** |
| * The boolean type class |
| */ |
| public final class BooleanType extends Type { |
| private static final long serialVersionUID = 1L; |
| |
| private static final CompilerConstants.Call VALUE_OF = staticCallNoLookup(Boolean.class, "valueOf", Boolean.class, boolean.class); |
| private static final CompilerConstants.Call TO_STRING = staticCallNoLookup(Boolean.class, "toString", String.class, boolean.class); |
| |
| /** |
| * Constructor |
| */ |
| protected BooleanType() { |
| super("boolean", boolean.class, 1, 1); |
| } |
| |
| @Override |
| public Type nextWider() { |
| return INT; |
| } |
| |
| @Override |
| public Class<?> getBoxedType() { |
| return Boolean.class; |
| } |
| |
| @Override |
| public char getBytecodeStackType() { |
| return 'I'; |
| } |
| |
| @Override |
| public Type loadUndefined(final MethodVisitor method) { |
| method.visitLdcInsn(UNDEFINED_INT); |
| return BOOLEAN; |
| } |
| |
| @Override |
| public Type loadForcedInitializer(final MethodVisitor method) { |
| method.visitInsn(ICONST_0); |
| return BOOLEAN; |
| } |
| |
| @Override |
| public void _return(final MethodVisitor method) { |
| method.visitInsn(IRETURN); |
| } |
| |
| @Override |
| public Type load(final MethodVisitor method, final int slot) { |
| assert slot != -1; |
| method.visitVarInsn(ILOAD, slot); |
| return BOOLEAN; |
| } |
| |
| @Override |
| public void store(final MethodVisitor method, final int slot) { |
| assert slot != -1; |
| method.visitVarInsn(ISTORE, slot); |
| } |
| |
| @Override |
| public Type ldc(final MethodVisitor method, final Object c) { |
| assert c instanceof Boolean; |
| method.visitInsn((Boolean) c ? ICONST_1 : ICONST_0); |
| return BOOLEAN; |
| } |
| |
| @Override |
| public Type convert(final MethodVisitor method, final Type to) { |
| if (isEquivalentTo(to)) { |
| return to; |
| } |
| |
| if (to.isNumber()) { |
| method.visitInsn(I2D); |
| } else if (to.isLong()) { |
| method.visitInsn(I2L); |
| } else if (to.isInteger()) { |
| //nop |
| } else if (to.isString()) { |
| invokestatic(method, TO_STRING); |
| } else if (to.isObject()) { |
| invokestatic(method, VALUE_OF); |
| } else { |
| throw new UnsupportedOperationException("Illegal conversion " + this + " -> " + to); |
| } |
| |
| return to; |
| } |
| |
| @Override |
| public Type add(final MethodVisitor method, final int programPoint) { |
| // Adding booleans in JavaScript is perfectly valid, they add as if false=0 and true=1 |
| if(programPoint == INVALID_PROGRAM_POINT) { |
| method.visitInsn(IADD); |
| } else { |
| method.visitInvokeDynamicInsn("iadd", "(II)I", MATHBOOTSTRAP, programPoint); |
| } |
| return INT; |
| } |
| } |