741 ldub(Lbcp, bcp_offset, tmp);
742 } else {
743 ShouldNotReachHere();
744 }
745 }
746
747
748 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register tmp,
749 int bcp_offset, size_t index_size) {
750 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
751 assert_different_registers(cache, tmp);
752 assert_not_delayed();
753 get_cache_index_at_bcp(cache, tmp, bcp_offset, index_size);
754 // convert from field index to ConstantPoolCacheEntry index and from
755 // word index to byte offset
756 sll(tmp, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord), tmp);
757 add(LcpoolCache, tmp, cache);
758 }
759
760
761 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
762 int bcp_offset, size_t index_size) {
763 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
764 assert_different_registers(cache, tmp);
765 assert_not_delayed();
766 if (index_size == sizeof(u2)) {
767 get_2_byte_integer_at_bcp(bcp_offset, cache, tmp, Unsigned);
768 } else {
769 ShouldNotReachHere(); // other sizes not supported here
770 }
771 // convert from field index to ConstantPoolCacheEntry index
772 // and from word index to byte offset
773 sll(tmp, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord), tmp);
774 // skip past the header
775 add(tmp, in_bytes(constantPoolCacheOopDesc::base_offset()), tmp);
776 // construct pointer to cache entry
777 add(LcpoolCache, tmp, cache);
778 }
779
780
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741 ldub(Lbcp, bcp_offset, tmp);
742 } else {
743 ShouldNotReachHere();
744 }
745 }
746
747
748 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register tmp,
749 int bcp_offset, size_t index_size) {
750 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
751 assert_different_registers(cache, tmp);
752 assert_not_delayed();
753 get_cache_index_at_bcp(cache, tmp, bcp_offset, index_size);
754 // convert from field index to ConstantPoolCacheEntry index and from
755 // word index to byte offset
756 sll(tmp, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord), tmp);
757 add(LcpoolCache, tmp, cache);
758 }
759
760
761 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
762 Register temp,
763 Register bytecode,
764 int byte_no,
765 int bcp_offset,
766 size_t index_size) {
767 get_cache_and_index_at_bcp(cache, temp, bcp_offset, index_size);
768 ld_ptr(cache, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::indices_offset(), bytecode);
769 const int shift_count = (1 + byte_no) * BitsPerByte;
770 srl( bytecode, shift_count, bytecode);
771 and3(bytecode, 0xFF, bytecode);
772 }
773
774
775 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
776 int bcp_offset, size_t index_size) {
777 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
778 assert_different_registers(cache, tmp);
779 assert_not_delayed();
780 if (index_size == sizeof(u2)) {
781 get_2_byte_integer_at_bcp(bcp_offset, cache, tmp, Unsigned);
782 } else {
783 ShouldNotReachHere(); // other sizes not supported here
784 }
785 // convert from field index to ConstantPoolCacheEntry index
786 // and from word index to byte offset
787 sll(tmp, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord), tmp);
788 // skip past the header
789 add(tmp, in_bytes(constantPoolCacheOopDesc::base_offset()), tmp);
790 // construct pointer to cache entry
791 add(LcpoolCache, tmp, cache);
792 }
793
794
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