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Commit 55afaad

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author
hborders
committed
Added package com.sun.max.unsafe from Maxine VM.
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‎JavaInJava/src/com/sun/max/unsafe/Accessor.java‎

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‎JavaInJava/src/com/sun/max/unsafe/Address.java‎

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‎JavaInJava/src/com/sun/max/unsafe/Boxed.java‎

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/*
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* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
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*
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* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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* that is described in this document. In particular, and without limitation, these intellectual property
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* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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* more additional patents or pending patent applications in the U.S. and in other countries.
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*
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* U.S. Government Rights - Commercial software. Government users are subject to the Sun
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* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
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* supplements.
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*
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* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
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* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
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* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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* U.S. and other countries.
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*
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* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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* Company, Ltd.
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*/
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package com.sun.max.unsafe;
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import com.sun.max.annotate.*;
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import com.sun.max.vm.*;
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/**
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* Interface implemented by boxed versions of {@link Word} types.
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* These boxed implementations are used when executing in {@linkplain MaxineVM#isHosted() hosted} mode.
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*
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* A boxed type must be in the same package as its corresponding unboxed type and
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* its name must be composed by added the prefix "Boxed" to the name of the unboxed type.
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* This invariant enables the complete set of boxed types to be derived from the known
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* set of unboxed types.
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*
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* @author Bernd Mathiske
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* @author Doug Simon
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*/
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@HOSTED_ONLY
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public interface Boxed {
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/**
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* Gets the boxed value as a {@code long}.
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*/
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long value();
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}
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‎JavaInJava/src/com/sun/max/unsafe/BoxedAddress.java‎

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/*
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* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
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*
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* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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* that is described in this document. In particular, and without limitation, these intellectual property
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* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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* more additional patents or pending patent applications in the U.S. and in other countries.
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*
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* U.S. Government Rights - Commercial software. Government users are subject to the Sun
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* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
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* supplements.
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*
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* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
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* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
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* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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* U.S. and other countries.
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*
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* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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* Company, Ltd.
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*/
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package com.sun.max.unsafe;
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import java.math.*;
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import com.sun.max.annotate.*;
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/**
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* Boxed version of Address.
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*
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* @see Address
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*
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* @author Bernd Mathiske
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*/
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@HOSTED_ONLY
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public final class BoxedAddress extends Address implements Boxed {
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private long nativeWord;
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public static final BoxedAddress ZERO = new BoxedAddress(0);
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public static final BoxedAddress MAX = new BoxedAddress(-1L);
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private static final class Cache {
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private Cache() {
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}
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static final int HIGHEST_VALUE = 1000;
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static final BoxedAddress[] cache = new BoxedAddress[HIGHEST_VALUE + 1];
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static {
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for (int i = 0; i < cache.length; i++) {
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cache[i] = new BoxedAddress(i);
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}
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}
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}
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public static BoxedAddress from(long value) {
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if (value == 0) {
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return ZERO;
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}
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if (value >= 0 && value <= Cache.HIGHEST_VALUE) {
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return Cache.cache[(int) value];
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}
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if (value == -1L) {
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return MAX;
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}
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return new BoxedAddress(value);
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}
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public static BoxedAddress from(int value) {
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return from(value & BoxedWord.INT_MASK);
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}
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private BoxedAddress(long value) {
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if (Word.width() == 64) {
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nativeWord = value;
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} else {
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nativeWord = value & BoxedWord.INT_MASK;
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}
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}
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public long value() {
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return nativeWord;
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}
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private static BigInteger bi(long unsigned) {
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if (unsigned < 0) {
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long signBit = 0x8000000000000000L;
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long low63Bits = unsigned & ~signBit;
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return BigInteger.valueOf(low63Bits).setBit(63);
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}
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return BigInteger.valueOf(unsigned);
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}
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private static long unsignedDivide(long dividend, long divisor) {
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if (dividend >= 0 && divisor >= 0) {
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return dividend / divisor;
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}
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return bi(dividend).divide(bi(divisor)).longValue();
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}
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@Override
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public Address dividedByAddress(Address divisor) {
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final BoxedAddress box = (BoxedAddress) divisor.asAddress();
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if (box.nativeWord == 0L) {
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throw new ArithmeticException();
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}
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return new BoxedAddress(unsignedDivide(nativeWord, box.nativeWord));
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}
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@Override
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public Address dividedByInt(int divisor) {
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if (divisor == 0) {
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throw new ArithmeticException();
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}
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return new BoxedAddress(unsignedDivide(nativeWord, divisor & BoxedWord.INT_MASK));
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}
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private static long unsignedRemainder(long dividend, long divisor) {
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if (dividend >= 0 && divisor >= 0) {
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return dividend % divisor;
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}
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return bi(dividend).remainder(bi(divisor)).longValue();
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}
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@Override
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public Address remainderByAddress(Address divisor) {
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final BoxedAddress box = (BoxedAddress) divisor.asAddress();
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if (box.nativeWord == 0L) {
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throw new ArithmeticException();
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}
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return new BoxedAddress(unsignedRemainder(nativeWord, box.nativeWord));
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}
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@Override
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public int remainderByInt(int divisor) {
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if (divisor == 0) {
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throw new ArithmeticException();
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}
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return (int) unsignedRemainder(nativeWord, divisor & BoxedWord.INT_MASK);
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}
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}
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‎JavaInJava/src/com/sun/max/unsafe/BoxedOffset.java‎

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/*
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* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
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*
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* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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* that is described in this document. In particular, and without limitation, these intellectual property
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* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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* more additional patents or pending patent applications in the U.S. and in other countries.
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*
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* U.S. Government Rights - Commercial software. Government users are subject to the Sun
10+
* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
11+
* supplements.
12+
*
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* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
14+
* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
15+
* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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* U.S. and other countries.
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*
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* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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* Company, Ltd.
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*/
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package com.sun.max.unsafe;
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import com.sun.max.annotate.*;
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/**
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* Boxed version of Offset.
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*
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* @author Bernd Mathiske
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*/
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@HOSTED_ONLY
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public final class BoxedOffset extends Offset implements Boxed {
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private long nativeWord;
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public static final BoxedOffset ZERO = new BoxedOffset(0);
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private static final class Cache {
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private Cache() {
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}
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static final int LOWEST_VALUE = -100;
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static final int HIGHEST_VALUE = 1000;
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static final BoxedOffset[] cache = new BoxedOffset[(HIGHEST_VALUE - LOWEST_VALUE) + 1];
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static {
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for (int i = 0; i < cache.length; i++) {
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cache[i] = new BoxedOffset(i + LOWEST_VALUE);
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}
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}
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}
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public static BoxedOffset from(long value) {
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if (value == 0) {
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return ZERO;
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}
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if (value >= Cache.LOWEST_VALUE && value <= Cache.HIGHEST_VALUE) {
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return Cache.cache[(int) value - Cache.LOWEST_VALUE];
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}
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return new BoxedOffset(value);
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}
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private BoxedOffset(long value) {
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nativeWord = value;
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}
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public long value() {
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return nativeWord;
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}
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}

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