property = new PropertyMetaData(name, this);
            declaredProperties.put(name, property);
        }
        return property;
    }

    public Map<String, String> getConstants() {
        return constants;
    }

    public void addEnumConstant(String name) {
        enumConstants.add(new EnumConstantMetaData(name, this));
    }

			// Strange special case: MCR, MRC.
			prog.To.Type = obj.TYPE_CONST
			x0 := p.getConstant(prog, op, &a[0])
			x1 := p.getConstant(prog, op, &a[1])
			x2 := int64(p.getRegister(prog, op, &a[2]))
			x3 := int64(p.getRegister(prog, op, &a[3]))
			x4 := int64(p.getRegister(prog, op, &a[4]))
			x5 := p.getConstant(prog, op, &a[5])
			// Cond is handled specially for this instruction.