6035 RegisterOrConstant itable_index,
6036 Register method_result,
6037 Register scan_temp,
6038 Label& L_no_such_interface) {
6039 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp);
6040 assert(itable_index.is_constant() || itable_index.as_register() == method_result,
6041 "caller must use same register for non-constant itable index as for method");
6042
6043 // Compute start of first itableOffsetEntry (which is at the end of the vtable)
6044 int vtable_base = InstanceKlass::vtable_start_offset() * wordSize;
6045 int itentry_off = itableMethodEntry::method_offset_in_bytes();
6046 int scan_step = itableOffsetEntry::size() * wordSize;
6047 int vte_size = vtableEntry::size() * wordSize;
6048 Address::ScaleFactor times_vte_scale = Address::times_ptr;
6049 assert(vte_size == wordSize, "else adjust times_vte_scale");
6050
6051 movl(scan_temp, Address(recv_klass, InstanceKlass::vtable_length_offset() * wordSize));
6052
6053 // %%% Could store the aligned, prescaled offset in the klassoop.
6054 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base));
6055 if (HeapWordsPerLong > 1) {
6056 // Round up to align_object_offset boundary
6057 // see code for InstanceKlass::start_of_itable!
6058 round_to(scan_temp, BytesPerLong);
6059 }
6060
6061 // Adjust recv_klass by scaled itable_index, so we can free itable_index.
6062 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
6063 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
6064
6065 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) {
6066 // if (scan->interface() == intf) {
6067 // result = (klass + scan->offset() + itable_index);
6068 // }
6069 // }
6070 Label search, found_method;
6071
6072 for (int peel = 1; peel >= 0; peel--) {
6073 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes()));
6074 cmpptr(intf_klass, method_result);
6075
6076 if (peel) {
6077 jccb(Assembler::equal, found_method);
6078 } else {
6079 jccb(Assembler::notEqual, search);
|
6035 RegisterOrConstant itable_index,
6036 Register method_result,
6037 Register scan_temp,
6038 Label& L_no_such_interface) {
6039 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp);
6040 assert(itable_index.is_constant() || itable_index.as_register() == method_result,
6041 "caller must use same register for non-constant itable index as for method");
6042
6043 // Compute start of first itableOffsetEntry (which is at the end of the vtable)
6044 int vtable_base = InstanceKlass::vtable_start_offset() * wordSize;
6045 int itentry_off = itableMethodEntry::method_offset_in_bytes();
6046 int scan_step = itableOffsetEntry::size() * wordSize;
6047 int vte_size = vtableEntry::size() * wordSize;
6048 Address::ScaleFactor times_vte_scale = Address::times_ptr;
6049 assert(vte_size == wordSize, "else adjust times_vte_scale");
6050
6051 movl(scan_temp, Address(recv_klass, InstanceKlass::vtable_length_offset() * wordSize));
6052
6053 // %%% Could store the aligned, prescaled offset in the klassoop.
6054 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base));
6055
6056 // Adjust recv_klass by scaled itable_index, so we can free itable_index.
6057 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
6058 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
6059
6060 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) {
6061 // if (scan->interface() == intf) {
6062 // result = (klass + scan->offset() + itable_index);
6063 // }
6064 // }
6065 Label search, found_method;
6066
6067 for (int peel = 1; peel >= 0; peel--) {
6068 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes()));
6069 cmpptr(intf_klass, method_result);
6070
6071 if (peel) {
6072 jccb(Assembler::equal, found_method);
6073 } else {
6074 jccb(Assembler::notEqual, search);
|