diff -r 19f25e603e7b -r 56aae7be60d4 src/cpu/x86/vm/interp_masm_x86_64.cpp
--- a/src/cpu/x86/vm/interp_masm_x86_64.cpp	Tue Mar 03 18:25:57 2009 -0800
+++ b/src/cpu/x86/vm/interp_masm_x86_64.cpp	Wed Mar 04 09:58:39 2009 -0800
@@ -190,7 +190,7 @@
                                                            int bcp_offset) {
   assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
   assert(cache != index, "must use different registers");
-  load_unsigned_word(index, Address(r13, bcp_offset));
+  load_unsigned_short(index, Address(r13, bcp_offset));
   movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
   assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
   // convert from field index to ConstantPoolCacheEntry index
@@ -203,7 +203,7 @@
                                                                int bcp_offset) {
   assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
   assert(cache != tmp, "must use different register");
-  load_unsigned_word(tmp, Address(r13, bcp_offset));
+  load_unsigned_short(tmp, Address(r13, bcp_offset));
   assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
   // convert from field index to ConstantPoolCacheEntry index
   // and from word offset to byte offset
@@ -1063,8 +1063,8 @@
 
   // If the mdp is valid, it will point to a DataLayout header which is
   // consistent with the bcp.  The converse is highly probable also.
-  load_unsigned_word(c_rarg2,
-                     Address(c_rarg3, in_bytes(DataLayout::bci_offset())));
+  load_unsigned_short(c_rarg2,
+                      Address(c_rarg3, in_bytes(DataLayout::bci_offset())));
   addptr(c_rarg2, Address(rbx, methodOopDesc::const_offset()));
   lea(c_rarg2, Address(c_rarg2, constMethodOopDesc::codes_offset()));
   cmpptr(c_rarg2, r13);