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/*
* 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.DADD;
import static jdk.internal.org.objectweb.asm.Opcodes.DCMPG;
import static jdk.internal.org.objectweb.asm.Opcodes.DCMPL;
import static jdk.internal.org.objectweb.asm.Opcodes.DCONST_0;
import static jdk.internal.org.objectweb.asm.Opcodes.DCONST_1;
import static jdk.internal.org.objectweb.asm.Opcodes.DDIV;
import static jdk.internal.org.objectweb.asm.Opcodes.DLOAD;
import static jdk.internal.org.objectweb.asm.Opcodes.DMUL;
import static jdk.internal.org.objectweb.asm.Opcodes.DNEG;
import static jdk.internal.org.objectweb.asm.Opcodes.DREM;
import static jdk.internal.org.objectweb.asm.Opcodes.DRETURN;
import static jdk.internal.org.objectweb.asm.Opcodes.DSTORE;
import static jdk.internal.org.objectweb.asm.Opcodes.DSUB;
import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.nashorn.internal.codegen.CompilerConstants;
import jdk.nashorn.internal.codegen.ObjectClassGenerator;
import jdk.nashorn.internal.runtime.JSType;
class NumberType extends NumericType {
private static final CompilerConstants.Call VALUE_OF = staticCallNoLookup(Double.class, "valueOf", Double.class, double.class);
protected NumberType() {
super("double", double.class, 4, 2);
}
@Override
public Type nextWider() {
return OBJECT;
}
@Override
public Class<?> getBoxedType() {
return Double.class;
}
@Override
public Type cmp(final MethodVisitor method, final boolean isCmpG) {
method.visitInsn(isCmpG ? DCMPG : DCMPL);
return INT;
}
@Override
public Type load(final MethodVisitor method, final int slot) {
assert slot != -1;
method.visitVarInsn(DLOAD, slot);
return NUMBER;
}
@Override
public void store(final MethodVisitor method, final int slot) {
assert slot != -1;
method.visitVarInsn(DSTORE, slot);
}
@Override
public Type loadUndefined(final MethodVisitor method) {
method.visitLdcInsn(ObjectClassGenerator.UNDEFINED_DOUBLE);
return NUMBER;
}
@Override
public Type ldc(final MethodVisitor method, final Object c) {
assert c instanceof Double;
final double value = (Double) c;
if (Double.doubleToLongBits(value) == 0L) { // guard against -0.0
method.visitInsn(DCONST_0);
} else if (value == 1.0) {
method.visitInsn(DCONST_1);
} else {
method.visitLdcInsn(value);
}
return NUMBER;
}
@Override
public Type convert(final MethodVisitor method, final Type to) {
if (isEquivalentTo(to)) {
return null;
}
if (to.isInteger()) {
invokeStatic(method, JSType.TO_INT32_D);
} else if (to.isLong()) {
invokeStatic(method, JSType.TO_INT64_D);
} else if (to.isBoolean()) {
invokeStatic(method, JSType.TO_BOOLEAN_D);
} else if (to.isString()) {
invokeStatic(method, JSType.TO_STRING_D);
} else if (to.isObject()) {
invokeStatic(method, VALUE_OF);
} else {
assert false : "Illegal conversion " + this + " -> " + to;
}
return to;
}
@Override
public Type add(final MethodVisitor method) {
method.visitInsn(DADD);
return NUMBER;
}
@Override
public Type sub(final MethodVisitor method) {
method.visitInsn(DSUB);
return NUMBER;
}
@Override
public Type mul(final MethodVisitor method) {
method.visitInsn(DMUL);
return NUMBER;
}
@Override
public Type div(final MethodVisitor method) {
method.visitInsn(DDIV);
return NUMBER;
}
@Override
public Type rem(final MethodVisitor method) {
method.visitInsn(DREM);
return NUMBER;
}
@Override
public Type neg(final MethodVisitor method) {
method.visitInsn(DNEG);
return NUMBER;
}
@Override
public void _return(final MethodVisitor method) {
method.visitInsn(DRETURN);
}
}
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