bytecodefragments.java

JPC: x86 PC Hardware Emulator. 牛津大学开发的一个纯JAVA的x86系统结构硬件模拟器。

									   new Integer(JavaOpcode.INVOKEVIRTUAL), method("setSignFlag", Boolean.TYPE) };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_TFLAG] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsTrap") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_IFLAG] = new Object[] { new Integer(JavaOpcode.DUP),
									   new Integer(JavaOpcode.ALOAD_1),
									   new Integer(JavaOpcode.DUP_X2),
									   new Integer(JavaOpcode.SWAP),
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsInterruptEnable"),
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsInterruptEnableSoon") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_DFLAG] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsDirection") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_OFLAG] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.INVOKEVIRTUAL), method("setOverflowFlag", Boolean.TYPE) };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_IOPL] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsIOPrivilegeLevel") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_NTFLAG] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsNestedTask") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_RFLAG] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsResume") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_VMFLAG] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsVirtual8086Mode") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_ACFLAG] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsAlignmentCheck") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_VIFLAG] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsVirtualInterrupt") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_VIPFLAG] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsVirtualInterruptPending") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_IDFLAG] = new Object[] { new Integer(JavaOpcode.ALOAD_1), 
									   new Integer(JavaOpcode.SWAP), 
									   new Integer(JavaOpcode.PUTFIELD), field("eflagsID") };
        	
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_ES] = new Object[] { new Integer(JavaOpcode.ALOAD_1),
									new Integer(JavaOpcode.SWAP),
									new Integer(JavaOpcode.PUTFIELD), field("es") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_CS] = new Object[] { new Integer(JavaOpcode.ALOAD_1),
									new Integer(JavaOpcode.SWAP),
									new Integer(JavaOpcode.PUTFIELD), field("cs") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_SS] = new Object[] { new Integer(JavaOpcode.ALOAD_1),
									new Integer(JavaOpcode.SWAP),
									new Integer(JavaOpcode.PUTFIELD), field("ss") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_DS] = new Object[] { new Integer(JavaOpcode.ALOAD_1),
									new Integer(JavaOpcode.SWAP),
									new Integer(JavaOpcode.PUTFIELD), field("ds") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_FS] = new Object[] { new Integer(JavaOpcode.ALOAD_1),
									new Integer(JavaOpcode.SWAP),
									new Integer(JavaOpcode.PUTFIELD), field("fs") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_GS] = new Object[] { new Integer(JavaOpcode.ALOAD_1),
									new Integer(JavaOpcode.SWAP),
									new Integer(JavaOpcode.PUTFIELD), field("gs") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_IDTR] = new Object[] { new Integer(JavaOpcode.ALOAD_1),
									  new Integer(JavaOpcode.SWAP),
									  new Integer(JavaOpcode.PUTFIELD), field("idtr") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_GDTR] = new Object[] { new Integer(JavaOpcode.ALOAD_1),
									  new Integer(JavaOpcode.SWAP),
									  new Integer(JavaOpcode.PUTFIELD), field("gdtr") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_LDTR] = new Object[] { new Integer(JavaOpcode.ALOAD_1),
									  new Integer(JavaOpcode.SWAP),
									  new Integer(JavaOpcode.PUTFIELD), field("ldtr") };
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_TSS] = new Object[] { new Integer(JavaOpcode.ALOAD_1),
									  new Integer(JavaOpcode.SWAP),
									  new Integer(JavaOpcode.PUTFIELD), field("tss") };
	
        popCodeArray[FASTCompiler.PROCESSOR_ELEMENT_ADDR0] = new Object[] { new Integer(JavaOpcode.POP) };
    }
    
    protected BytecodeFragments() {}

    public static Object[] pushCode(int element)
    {
        Object[] temp = pushCodeArray[element];
        if (temp == null) 
            throw new IllegalStateException("Non existant CPU Element: "+element);
        return temp;
    }

    public static Object[] popCode(int element)
    {
        Object[] temp = popCodeArray[element];
        if (temp == null) 
            throw new IllegalStateException("Non existant CPU Element: "+element);
        return temp;
    }

    public static Object field(String name)
    {
        try {
            return new ConstantPoolSymbol(Processor.class.getDeclaredField(name));
        } catch (NoSuchFieldException e) {
            throw new IllegalStateException(e);
        }
    }

    public static Object field(Class cls, String name)
    {
        try {
            return new ConstantPoolSymbol(cls.getDeclaredField(name));
        } catch (NoSuchFieldException e) {
            throw new IllegalStateException(e);
        }
    }

    public static Object method(String name)
    {
        return method(name, new Class[0]);
    }

    public static Object method(String name, Class arg)
    {
        return method(name, new Class[]{arg});
    }

    public static Object method(String name, Class arg0, Class arg1)
    {
        return method(name, new Class[]{arg0, arg1});
    }

    public static Object method(String name, Class[] args)
    {
        try {
            return new ConstantPoolSymbol(Processor.class.getDeclaredMethod(name, args));
        } catch (NoSuchMethodException e) {
            throw new IllegalStateException(e);
        }
    }

    public static Object method(Class cls, String name)
    {
        return method(cls, name, new Class[0]);
    }

    public static Object method(Class cls, String name, Class arg)
    {
        return method(cls, name, new Class[]{arg});
    }

    public static Object method(Class cls, String name, Class arg0, Class arg1)
    {
        return method(cls, name, new Class[]{arg0, arg1});
    }

    public static Object method(Class cls, String name, Class arg0, Class arg1, Class arg2)
    {
        return method(cls, name, new Class[]{arg0, arg1, arg2});
    }

    public static Object method(Class cls, String name, Class[] args)
    {
        try {
            return new ConstantPoolSymbol(cls.getMethod(name, args));
        } catch (NoSuchMethodException e) {
            throw new IllegalStateException(e);
        }
    }

    public static Object integer(int value)
    {
        return new ConstantPoolSymbol(new Integer(value));
    }

    public static Object longint(long value)
    {
	return new ConstantPoolSymbol(new Long(value));
    }    
}