vmx86architecture.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 86 行

/*
 * $Id: VmX86Architecture.java,v 1.5 2004/02/20 08:20:56 epr Exp $
 */
package org.jnode.vm.x86;

import java.nio.ByteOrder;

import org.jnode.vm.VmArchitecture;
import org.jnode.vm.VmProcessor;
import org.jnode.vm.VmStackReader;
import org.jnode.vm.classmgr.VmStatics;
import org.jnode.vm.compiler.NativeCodeCompiler;
import org.jnode.vm.x86.compiler.stub.X86StubCompiler;
import org.jnode.vm.x86.compiler.l1.X86Level1Compiler;

/**
 * Architecture descriptor for the Intel X86 architecture.
 * 
 * @author Ewout Prangsma ([e-mail])
 */
public final class VmX86Architecture extends VmArchitecture {

	public static final int SLOT_SIZE = 4;

	/** The stackreader of this architecture */
	private final VmX86StackReader stackReader = new VmX86StackReader();

	/** The compilers */
	private final NativeCodeCompiler[] compilers = { /*new X86Level0Compiler(), */new X86StubCompiler(), new X86Level1Compiler()};

	/**
	 * Gets the name of this architecture.
	 * 
	 * @return name
	 */
	public final String getName() {
		return "x86";
	}

	/**
	 * Gets the byte ordering of this architecture.
	 * 
	 * @return ByteOrder
	 */
	public final ByteOrder getByteOrder() {
		return ByteOrder.LITTLE_ENDIAN;
	}

	/**
	 * Gets the size in bytes of an object reference.
	 * 
	 * @return Size of reference, always 4 here
	 */
	public final int getReferenceSize() {
		return SLOT_SIZE;
	}

	/**
	 * Gets the stackreader for this architecture.
	 * 
	 * @return Stack reader
	 */
	public final VmStackReader getStackReader() {
		return stackReader;
	}

	/**
	 * Gets all compilers for this architecture.
	 * 
	 * @return The compilers, sorted by optimization level, from least optimizations to most
	 *         optimizations.
	 */
	public final NativeCodeCompiler[] getCompilers() {
		return compilers;
	}

	/**
	 * Create a processor instance for this architecture.
	 * 
	 * @return The processor
	 */
	public VmProcessor createProcessor(int id, VmStatics statics) {
		return new VmX86Processor(id, this, statics, null);
	}
}