Examples of org.jnode.assembler.Label

org.jnode.assembler.Label
A Label is a reference to an address in the native code. @author Ewout Prangsma (epr@users.sourceforge.net)

        val.load(eContext);


        if (os.isCode32()) {
            final GPR v1_lsb = val.getLsbRegister(eContext);
            final GPR v1_msb = val.getMsbRegister(eContext);
            final Label curInstrLabel = getCurInstrLabel();


            os.writeAND(ECX, 63);
            os.writeCMP_Const(ECX, 32);
            final Label gt32Label = new Label(curInstrLabel + "gt32");
            final Label endLabel = new Label(curInstrLabel + "end");
            os.writeJCC(gt32Label, X86Constants.JAE); // JAE
            /** ECX < 32 */
            os.writeSHLD_CL(v1_msb, v1_lsb);
            os.writeSHL_CL(v1_lsb);
            os.writeJMP(endLabel);

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        val.load(eContext);


        if (os.isCode32()) {
            final X86Register.GPR lsb = val.getLsbRegister(eContext);
            final X86Register.GPR msb = val.getMsbRegister(eContext);
            final Label curInstrLabel = getCurInstrLabel();


            // Calculate
            os.writeAND(ECX, 63);
            os.writeCMP_Const(ECX, 32);
            final Label gt32Label = new Label(curInstrLabel + "gt32");
            final Label endLabel = new Label(curInstrLabel + "end");
            os.writeJCC(gt32Label, X86Constants.JAE); // JAE
            /** ECX < 32 */
            os.writeSHRD_CL(lsb, msb);
            os.writeSAR_CL(msb);
            os.writeJMP(endLabel);

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        val.load(eContext);


        if (os.isCode32()) {
            final X86Register.GPR lsb = val.getLsbRegister(eContext);
            final X86Register.GPR msb = val.getMsbRegister(eContext);
            final Label curInstrLabel = getCurInstrLabel();


            // Calculate
            os.writeAND(ECX, 63);
            os.writeCMP_Const(ECX, 32);
            final Label gt32Label = new Label(curInstrLabel + "gt32");
            final Label endLabel = new Label(curInstrLabel + "end");
            os.writeJCC(gt32Label, X86Constants.JAE); // JAE
            /** ECX < 32 */
            os.writeSHRD_CL(lsb, msb);
            os.writeSHR_CL(msb);
            os.writeJMP(endLabel);

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        if (countBytecode) {
            counters.getCounter("putstatic").inc();
        }


        final Label curInstrLabel = getCurInstrLabel();
        fieldRef.resolve(loader);
        final VmStaticField sf = (VmStaticField) fieldRef.getResolvedVmField();


        // Initialize class if needed
        if (!sf.getDeclaringClass().isAlwaysInitialized()) {

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            }
            // If outsite low-high range, jump to default
            os.writeCMP_Const(valr, n);
            os.writeJCC(helper.getInstrLabel(defAddress), X86Constants.JAE);


            final Label curInstrLabel = getCurInstrLabel();
            final Label l1 = new Label(curInstrLabel + "$$l1");
            final Label l2 = new Label(curInstrLabel + "$$l2");
            final int l12distance = os.isCode32() ? 12 : 23;


            // Get absolute address of l1 into S0. (do not use
            // stackMgr.writePOP!)
            os.writeCALL(l1);

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        // the native code


        final VmType<?> declClass = fieldRef.getResolvedVmField()
            .getDeclaringClass();
        if (!declClass.isAlwaysInitialized()) {
            final Label curInstrLabel = getCurInstrLabel();


            // Allocate a register to hold the class
            final GPR classReg = (GPR) L1AHelper.requestRegister(eContext, JvmType.REFERENCE, false);


            // Load classRef into the register
            // Load the class from the statics table
            if (os.isCode32()) {
                helper.writeGetStaticsEntry(new Label(curInstrLabel + "$$ic"),
                    classReg, declClass);
            } else {
                helper.writeGetStaticsEntry64(new Label(curInstrLabel + "$$ic"),
                    (GPR64) classReg, (VmSharedStaticsEntry) declClass);
            }


            // Write class initialization code
            helper.writeClassInitialize(curInstrLabel, classReg, classReg, declClass);

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    private final void writeResolveAndLoadClassToReg(VmConstClass classRef,
                                                     GPR dst) {
        // Resolve the class
        classRef.resolve(loader);
        final VmType type = classRef.getResolvedVmClass();
        final Label curInstrLabel = getCurInstrLabel();


        // Load the class from the statics table
        if (os.isCode32()) {
            helper.writeGetStaticsEntry(curInstrLabel, dst, type);
        } else {

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     * @param ref
     * @param index
     */
    final void checkBounds(RefItem ref, IntItem index) {
        counters.getCounter("checkbounds").inc();
        final Label curInstrLabel = getCurInstrLabel();
        final Label test = new Label(curInstrLabel + "$$cbtest");
        final Label failed = new Label(curInstrLabel + "$$cbfailed");


        assertCondition(ref.isGPR(), "ref must be in a register");
        final GPR refr = ref.getRegister();


        os.writeJMP(test);

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    private void instanceOfClass(GPR objectr, VmClassType<?> type, GPR tmpr,
                                 GPR resultr, Label trueLabel, boolean skipNullTest) {


        final int depth = type.getSuperClassDepth();
        final int staticsOfs = helper.getSharedStaticsOffset(type);
        final Label curInstrLabel = getCurInstrLabel();
        final Label notInstanceOfLabel = new Label(curInstrLabel
            + "notInstanceOf");


        if (!type.isAlwaysInitialized()) {
            if (os.isCode32()) {
                helper.writeGetStaticsEntry(curInstrLabel, tmpr, type);

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     *                  directly after this method Register ECX must be free and it
     *                  destroyed.
     */
    private void instanceOf(GPR objectr, GPR typer, GPR tmpr, GPR cntr,
                            Label trueLabel, boolean skipNullTest) {
        final Label curInstrLabel = getCurInstrLabel();
        final Label loopLabel = new Label(curInstrLabel + "loop");
        final Label notInstanceOfLabel = new Label(curInstrLabel
            + "notInstanceOf");


        if (VmUtils.verifyAssertions()) {
            VmUtils._assert(objectr.getSize() == helper.ADDRSIZE, "objectr size");
            VmUtils._assert(typer.getSize() == helper.ADDRSIZE, "typer size");

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org.jnode.build.ObjectEmitter

org.jnode.build.x86.BootImageBuilder

org.jnode.jnasm.assembler.PseudoInstructions

org.jnode.jnasm.assembler.x86.X86Core

org.jnode.jnasm.assembler.x86.X86Support

org.jnode.linker.ElfLinker

org.jnode.test.X86StreamTest

org.jnode.vm.compiler.NativeCodeCompiler

org.jnode.vm.x86.compiler.AbstractX86Compiler

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