Mercurial > hg > graal-compiler
view graal/com.oracle.graal.word/src/com/oracle/graal/word/Pointer.java @ 7300:2912b72d840a
More complete and reusable Word type
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Fri, 04 Jan 2013 12:08:11 -0800 |
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children | d4bc143c575a |
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/* * Copyright (c) 2012, 2012, 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. * * 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 com.oracle.graal.word; public interface Pointer extends Unsigned { /** * Unsafe conversion of this Pointer to a Java language object. No correctness checks or type checks are performed. * The caller must ensure that the Pointer contains a valid Java object that can i.e., processed by the garbage * collector. * * @return this Pointer cast to Object. */ Object toObject(); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ byte readByte(WordBase offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ char readChar(WordBase offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ short readShort(WordBase offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ int readInt(WordBase offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ long readLong(WordBase offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ float readFloat(WordBase offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ double readDouble(WordBase offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ Word readWord(WordBase offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ Object readObject(WordBase offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @return the result of the memory access */ byte readByte(int offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @return the result of the memory access */ char readChar(int offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @return the result of the memory access */ short readShort(int offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @return the result of the memory access */ int readInt(int offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @return the result of the memory access */ long readLong(int offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @return the result of the memory access */ float readFloat(int offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @return the result of the memory access */ double readDouble(int offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @return the result of the memory access */ Word readWord(int offset); /** * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @return the result of the memory access */ Object readObject(int offset); /** * Reads the constant memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The caller guarantees that the memory content is final, i.e., never changing. The compiler can therefore * eliminate memory accesses more aggressively. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ byte readFinalByte(WordBase offset); /** * Reads the constant memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The caller guarantees that the memory content is final, i.e., never changing. The compiler can therefore * eliminate memory accesses more aggressively. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ char readFinalChar(WordBase offset); /** * Reads the constant memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The caller guarantees that the memory content is final, i.e., never changing. The compiler can therefore * eliminate memory accesses more aggressively. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ short readFinalShort(WordBase offset); /** * Reads the constant memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The caller guarantees that the memory content is final, i.e., never changing. The compiler can therefore * eliminate memory accesses more aggressively. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ int readFinalInt(WordBase offset); /** * Reads the constant memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The caller guarantees that the memory content is final, i.e., never changing. The compiler can therefore * eliminate memory accesses more aggressively. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ long readFinalLong(WordBase offset); /** * Reads the constant memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The caller guarantees that the memory content is final, i.e., never changing. The compiler can therefore * eliminate memory accesses more aggressively. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ float readFinalFloat(WordBase offset); /** * Reads the constant memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The caller guarantees that the memory content is final, i.e., never changing. The compiler can therefore * eliminate memory accesses more aggressively. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ double readFinalDouble(WordBase offset); /** * Reads the constant memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The caller guarantees that the memory content is final, i.e., never changing. The compiler can therefore * eliminate memory accesses more aggressively. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ Word readFinalWord(WordBase offset); /** * Reads the constant memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The caller guarantees that the memory content is final, i.e., never changing. The compiler can therefore * eliminate memory accesses more aggressively. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @return the result of the memory access */ Object readFinalObject(WordBase offset); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeByte(WordBase offset, byte val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeChar(WordBase offset, char val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeShort(WordBase offset, Short val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeInt(WordBase offset, int val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeLong(WordBase offset, long val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeFloat(WordBase offset, float val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeDouble(WordBase offset, double val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeWord(WordBase offset, WordBase val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. <br> * The offset is always treated as a {@link Signed} value. However, the static type is {@link WordBase} to avoid the * frequent casts to of {@link Unsigned} values (where the caller knows that the highest-order bit of the unsigned * value is never used). * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeObject(WordBase offset, Object val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeByte(int offset, byte val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeChar(int offset, char val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeShort(int offset, short val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeInt(int offset, int val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeLong(int offset, long val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeFloat(int offset, float val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeDouble(int offset, double val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeWord(int offset, WordBase val); /** * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in bytes. * * @param offset the signed offset for the memory access * @param val the value to be written to memory */ void writeObject(int offset, Object val); // Math functions that are defined in Unsigned, but known to preserve the pointer-characteristics. // It is therefore safe that they return a static type of Pointer instead of Unsigned. @Override Pointer add(Unsigned val); @Override Pointer add(int val); @Override Pointer subtract(Unsigned val); @Override Pointer subtract(int val); @Override Pointer and(Unsigned val); @Override Pointer and(int val); @Override Pointer or(Unsigned val); @Override Pointer or(int val); }