38 
  39 /**
  40  * Loads the constant section base into a register.
  41  *
  42  * <p>
  43  * Layout:
  44  *
  45  * <pre>
  46  * +----constant section----+--pad--+---code section--+
  47  * |<-------------------_------------------->|
  48  *                      ^- Constant section base pointer
  49  * </pre>
  50  *
  51  * The constant section base pointer is placed as such that the lowest offset -4096 points to the
  52  * start of the constant section.
  53  * <p>
  54  * If the constant section grows beyond 8k size, the immediate addressing cannot be used anymore; in
  55  * this case absolute addressing (without using the base pointer is used). See also:
  56  * CodeInstaller::pd_patch_DataSectionReference
  57  *
  58  * @see SPARCMove#loadFromConstantTable(CompilationResultBuilder, SPARCMacroAssembler, int,
  59  *      Register, jdk.vm.ci.meta.Constant, Register, SPARCDelayedControlTransfer)
  60  */
  61 public class SPARCLoadConstantTableBaseOp extends SPARCLIRInstruction {
  62     public static final LIRInstructionClass<SPARCLoadConstantTableBaseOp> TYPE = LIRInstructionClass.create(SPARCLoadConstantTableBaseOp.class);
  63     public static final SizeEstimate SIZE = SizeEstimate.create(9);
  64 
  65     private final NoOp placeHolder;
  66     @Def({REG}) private AllocatableValue base;
  67 
  68     public SPARCLoadConstantTableBaseOp(Variable base, NoOp placeHolder) {
  69         super(TYPE, SIZE);
  70         this.base = base;
  71         this.placeHolder = placeHolder;
  72     }
  73 
  74     @Override
  75     public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
  76         Register baseRegister = asRegister(base);
  77         int beforePosition = masm.position();
  78         masm.rdpc(baseRegister);
  79         // Must match with CodeInstaller::pd_patch_DataSectionReference

  38 
  39 /**
  40  * Loads the constant section base into a register.
  41  *
  42  * <p>
  43  * Layout:
  44  *
  45  * <pre>
  46  * +----constant section----+--pad--+---code section--+
  47  * |<-------------------_------------------->|
  48  *                      ^- Constant section base pointer
  49  * </pre>
  50  *
  51  * The constant section base pointer is placed as such that the lowest offset -4096 points to the
  52  * start of the constant section.
  53  * <p>
  54  * If the constant section grows beyond 8k size, the immediate addressing cannot be used anymore; in
  55  * this case absolute addressing (without using the base pointer is used). See also:
  56  * CodeInstaller::pd_patch_DataSectionReference
  57  *
  58  * @see SPARCMove#loadFromConstantTable(CompilationResultBuilder, SPARCMacroAssembler, Register,
  59  *      jdk.vm.ci.meta.Constant, Register, SPARCDelayedControlTransfer)
  60  */
  61 public class SPARCLoadConstantTableBaseOp extends SPARCLIRInstruction {
  62     public static final LIRInstructionClass<SPARCLoadConstantTableBaseOp> TYPE = LIRInstructionClass.create(SPARCLoadConstantTableBaseOp.class);
  63     public static final SizeEstimate SIZE = SizeEstimate.create(9);
  64 
  65     private final NoOp placeHolder;
  66     @Def({REG}) private AllocatableValue base;
  67 
  68     public SPARCLoadConstantTableBaseOp(Variable base, NoOp placeHolder) {
  69         super(TYPE, SIZE);
  70         this.base = base;
  71         this.placeHolder = placeHolder;
  72     }
  73 
  74     @Override
  75     public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
  76         Register baseRegister = asRegister(base);
  77         int beforePosition = masm.position();
  78         masm.rdpc(baseRegister);
  79         // Must match with CodeInstaller::pd_patch_DataSectionReference