893 Register method_result,
894 Register scan_temp,
895 Label& L_no_such_interface) {
896 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp);
897 assert(itable_index.is_constant() || itable_index.as_register() == method_result,
898 "caller must use same register for non-constant itable index as for method");
899
900 // Compute start of first itableOffsetEntry (which is at the end of the vtable)
901 int vtable_base = InstanceKlass::vtable_start_offset() * wordSize;
902 int itentry_off = itableMethodEntry::method_offset_in_bytes();
903 int scan_step = itableOffsetEntry::size() * wordSize;
904 int vte_size = vtableEntry::size() * wordSize;
905 assert(vte_size == wordSize, "else adjust times_vte_scale");
906
907 ldrw(scan_temp, Address(recv_klass, InstanceKlass::vtable_length_offset() * wordSize));
908
909 // %%% Could store the aligned, prescaled offset in the klassoop.
910 // lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base));
911 lea(scan_temp, Address(recv_klass, scan_temp, Address::lsl(3)));
912 add(scan_temp, scan_temp, vtable_base);
913 if (HeapWordsPerLong > 1) {
914 // Round up to align_object_offset boundary
915 // see code for instanceKlass::start_of_itable!
916 round_to(scan_temp, BytesPerLong);
917 }
918
919 // Adjust recv_klass by scaled itable_index, so we can free itable_index.
920 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
921 // lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
922 lea(recv_klass, Address(recv_klass, itable_index, Address::lsl(3)));
923 if (itentry_off)
924 add(recv_klass, recv_klass, itentry_off);
925
926 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) {
927 // if (scan->interface() == intf) {
928 // result = (klass + scan->offset() + itable_index);
929 // }
930 // }
931 Label search, found_method;
932
933 for (int peel = 1; peel >= 0; peel--) {
934 ldr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes()));
935 cmp(intf_klass, method_result);
936
937 if (peel) {
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893 Register method_result,
894 Register scan_temp,
895 Label& L_no_such_interface) {
896 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp);
897 assert(itable_index.is_constant() || itable_index.as_register() == method_result,
898 "caller must use same register for non-constant itable index as for method");
899
900 // Compute start of first itableOffsetEntry (which is at the end of the vtable)
901 int vtable_base = InstanceKlass::vtable_start_offset() * wordSize;
902 int itentry_off = itableMethodEntry::method_offset_in_bytes();
903 int scan_step = itableOffsetEntry::size() * wordSize;
904 int vte_size = vtableEntry::size() * wordSize;
905 assert(vte_size == wordSize, "else adjust times_vte_scale");
906
907 ldrw(scan_temp, Address(recv_klass, InstanceKlass::vtable_length_offset() * wordSize));
908
909 // %%% Could store the aligned, prescaled offset in the klassoop.
910 // lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base));
911 lea(scan_temp, Address(recv_klass, scan_temp, Address::lsl(3)));
912 add(scan_temp, scan_temp, vtable_base);
913
914 // Adjust recv_klass by scaled itable_index, so we can free itable_index.
915 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
916 // lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
917 lea(recv_klass, Address(recv_klass, itable_index, Address::lsl(3)));
918 if (itentry_off)
919 add(recv_klass, recv_klass, itentry_off);
920
921 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) {
922 // if (scan->interface() == intf) {
923 // result = (klass + scan->offset() + itable_index);
924 // }
925 // }
926 Label search, found_method;
927
928 for (int peel = 1; peel >= 0; peel--) {
929 ldr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes()));
930 cmp(intf_klass, method_result);
931
932 if (peel) {
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