299     for ( int i = 0; i < _bytes_to_copy; i++) {
 300       address ptr = (address)(_pc_start + i);
 301       int a_byte = (*ptr) & 0xFF;
 302       __ a_byte (a_byte);
 303       *ptr = 0x90; // make the site look like a nop
 304     }
 305   }
 306 
 307   address end_of_patch = __ pc();
 308   int bytes_to_skip = 0;
 309   if (_id == load_klass_id) {
 310     int offset = __ offset();
 311     if (CommentedAssembly) {
 312       __ block_comment(" being_initialized check");
 313     }
 314     assert(_obj != noreg, "must be a valid register");
 315     Register tmp = rax;
 316     Register tmp2 = rbx;
 317     __ push(tmp);
 318     __ push(tmp2);
 319     __ movptr(tmp2, Address(_obj, java_lang_Class::klass_offset_in_bytes()));
 320     __ get_thread(tmp);
 321     __ cmpptr(tmp, Address(tmp2, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc)));
 322     __ pop(tmp2);
 323     __ pop(tmp);
 324     __ jcc(Assembler::notEqual, call_patch);
 325 
 326     // access_field patches may execute the patched code before it's
 327     // copied back into place so we need to jump back into the main
 328     // code of the nmethod to continue execution.
 329     __ jmp(_patch_site_continuation);
 330 
 331     // make sure this extra code gets skipped
 332     bytes_to_skip += __ offset() - offset;
 333   }
 334   if (CommentedAssembly) {
 335     __ block_comment("patch data encoded as movl");
 336   }
 337   // Now emit the patch record telling the runtime how to find the
 338   // pieces of the patch.  We only need 3 bytes but for readability of
 339   // the disassembly we make the data look like a movl reg, imm32,

 299     for ( int i = 0; i < _bytes_to_copy; i++) {
 300       address ptr = (address)(_pc_start + i);
 301       int a_byte = (*ptr) & 0xFF;
 302       __ a_byte (a_byte);
 303       *ptr = 0x90; // make the site look like a nop
 304     }
 305   }
 306 
 307   address end_of_patch = __ pc();
 308   int bytes_to_skip = 0;
 309   if (_id == load_klass_id) {
 310     int offset = __ offset();
 311     if (CommentedAssembly) {
 312       __ block_comment(" being_initialized check");
 313     }
 314     assert(_obj != noreg, "must be a valid register");
 315     Register tmp = rax;
 316     Register tmp2 = rbx;
 317     __ push(tmp);
 318     __ push(tmp2);
 319     __ load_heap_oop(tmp2, Address(_obj, java_lang_Class::klass_offset_in_bytes()));
 320     __ get_thread(tmp);
 321     __ cmpptr(tmp, Address(tmp2, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc)));
 322     __ pop(tmp2);
 323     __ pop(tmp);
 324     __ jcc(Assembler::notEqual, call_patch);
 325 
 326     // access_field patches may execute the patched code before it's
 327     // copied back into place so we need to jump back into the main
 328     // code of the nmethod to continue execution.
 329     __ jmp(_patch_site_continuation);
 330 
 331     // make sure this extra code gets skipped
 332     bytes_to_skip += __ offset() - offset;
 333   }
 334   if (CommentedAssembly) {
 335     __ block_comment("patch data encoded as movl");
 336   }
 337   // Now emit the patch record telling the runtime how to find the
 338   // pieces of the patch.  We only need 3 bytes but for readability of
 339   // the disassembly we make the data look like a movl reg, imm32,