jdk8-mips64-public/hotspot: src/cpu/x86/vm/c1_LIRAssembler

src/cpu/x86/vm/c1_LIRAssembler_x86.cpp@5d046bf49ce7 (annotated)

src/cpu/x86/vm/c1_LIRAssembler_x86.cpp

Thu, 14 Apr 2011 13:45:41 -0700

author: johnc
date: Thu, 14 Apr 2011 13:45:41 -0700
changeset 2787: 5d046bf49ce7
parent 2728: 13bc79b5c9c8
child 2761: 15c9a0e16269
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "asm/assembler.hpp"
 #include "c1/c1_Compilation.hpp"
 #include "c1/c1_LIRAssembler.hpp"
 #include "c1/c1_MacroAssembler.hpp"
 #include "c1/c1_Runtime1.hpp"
 #include "c1/c1_ValueStack.hpp"
 #include "ci/ciArrayKlass.hpp"
 #include "ci/ciInstance.hpp"
 #include "gc_interface/collectedHeap.hpp"
 #include "memory/barrierSet.hpp"
 #include "memory/cardTableModRefBS.hpp"
 #include "nativeInst_x86.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "runtime/sharedRuntime.hpp"
 // These masks are used to provide 128-bit aligned bitmasks to the XMM
 // instructions, to allow sign-masking or sign-bit flipping.  They allow
 // fast versions of NegF/NegD and AbsF/AbsD.
 // Note: 'double' and 'long long' have 32-bits alignment on x86.
 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
   // Use the expression (adr)&(~0xF) to provide 128-bits aligned address
   // of 128-bits operands for SSE instructions.
   jlong *operand = (jlong*)(((long)adr)&((long)(~0xF)));
   // Store the value to a 128-bits operand.
   operand[0] = lo;
   operand[1] = hi;
   return operand;
 }
 // Buffer for 128-bits masks used by SSE instructions.
 static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment)
 // Static initialization during VM startup.
 static jlong *float_signmask_pool  = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF));
 static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF));
 static jlong *float_signflip_pool  = double_quadword(&fp_signmask_pool[3*2], CONST64(0x8000000080000000), CONST64(0x8000000080000000));
 static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], CONST64(0x8000000000000000), CONST64(0x8000000000000000));
 NEEDS_CLEANUP // remove this definitions ?
 const Register IC_Klass    = rax;   // where the IC klass is cached
 const Register SYNC_header = rax;   // synchronization header
 const Register SHIFT_count = rcx;   // where count for shift operations must be
 #define __ _masm->
 static void select_different_registers(Register preserve,
                                        Register extra,
                                        Register &tmp1,
                                        Register &tmp2) {
   if (tmp1 == preserve) {
     assert_different_registers(tmp1, tmp2, extra);
     tmp1 = extra;
   } else if (tmp2 == preserve) {
     assert_different_registers(tmp1, tmp2, extra);
     tmp2 = extra;
   }
   assert_different_registers(preserve, tmp1, tmp2);
 }
 static void select_different_registers(Register preserve,
                                        Register extra,
                                        Register &tmp1,
                                        Register &tmp2,
                                        Register &tmp3) {
   if (tmp1 == preserve) {
     assert_different_registers(tmp1, tmp2, tmp3, extra);
     tmp1 = extra;
   } else if (tmp2 == preserve) {
     assert_different_registers(tmp1, tmp2, tmp3, extra);
     tmp2 = extra;
   } else if (tmp3 == preserve) {
     assert_different_registers(tmp1, tmp2, tmp3, extra);
     tmp3 = extra;
   }
   assert_different_registers(preserve, tmp1, tmp2, tmp3);
 }
 bool LIR_Assembler::is_small_constant(LIR_Opr opr) {
   if (opr->is_constant()) {
     LIR_Const* constant = opr->as_constant_ptr();
     switch (constant->type()) {
       case T_INT: {
         return true;
       }
       default:
         return false;
     }
   }
   return false;
 }
 LIR_Opr LIR_Assembler::receiverOpr() {
   return FrameMap::receiver_opr;
 }
 LIR_Opr LIR_Assembler::incomingReceiverOpr() {
   return receiverOpr();
 }
 LIR_Opr LIR_Assembler::osrBufferPointer() {
   return FrameMap::as_pointer_opr(receiverOpr()->as_register());
 }
 //--------------fpu register translations-----------------------
 address LIR_Assembler::float_constant(float f) {
   address const_addr = __ float_constant(f);
   if (const_addr == NULL) {
     bailout("const section overflow");
     return __ code()->consts()->start();
   } else {
     return const_addr;
   }
 }
 address LIR_Assembler::double_constant(double d) {
   address const_addr = __ double_constant(d);
   if (const_addr == NULL) {
     bailout("const section overflow");
     return __ code()->consts()->start();
   } else {
     return const_addr;
   }
 }
 void LIR_Assembler::set_24bit_FPU() {
   __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24()));
 }
 void LIR_Assembler::reset_FPU() {
   __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
 }
 void LIR_Assembler::fpop() {
   __ fpop();
 }
 void LIR_Assembler::fxch(int i) {
   __ fxch(i);
 }
 void LIR_Assembler::fld(int i) {
   __ fld_s(i);
 }
 void LIR_Assembler::ffree(int i) {
   __ ffree(i);
 }
 void LIR_Assembler::breakpoint() {
   __ int3();
 }
 void LIR_Assembler::push(LIR_Opr opr) {
   if (opr->is_single_cpu()) {
     __ push_reg(opr->as_register());
   } else if (opr->is_double_cpu()) {
     NOT_LP64(__ push_reg(opr->as_register_hi()));
     __ push_reg(opr->as_register_lo());
   } else if (opr->is_stack()) {
     __ push_addr(frame_map()->address_for_slot(opr->single_stack_ix()));
   } else if (opr->is_constant()) {
     LIR_Const* const_opr = opr->as_constant_ptr();
     if (const_opr->type() == T_OBJECT) {
       __ push_oop(const_opr->as_jobject());
     } else if (const_opr->type() == T_INT) {
       __ push_jint(const_opr->as_jint());
     } else {
       ShouldNotReachHere();
     }
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::pop(LIR_Opr opr) {
   if (opr->is_single_cpu()) {
     __ pop_reg(opr->as_register());
   } else {
     ShouldNotReachHere();
   }
 }
 bool LIR_Assembler::is_literal_address(LIR_Address* addr) {
   return addr->base()->is_illegal() && addr->index()->is_illegal();
 }
 //-------------------------------------------
 Address LIR_Assembler::as_Address(LIR_Address* addr) {
   return as_Address(addr, rscratch1);
 }
 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) {
   if (addr->base()->is_illegal()) {
     assert(addr->index()->is_illegal(), "must be illegal too");
     AddressLiteral laddr((address)addr->disp(), relocInfo::none);
     if (! __ reachable(laddr)) {
       __ movptr(tmp, laddr.addr());
       Address res(tmp, 0);
       return res;
     } else {
       return __ as_Address(laddr);
     }
   }
   Register base = addr->base()->as_pointer_register();
   if (addr->index()->is_illegal()) {
     return Address( base, addr->disp());
   } else if (addr->index()->is_cpu_register()) {
     Register index = addr->index()->as_pointer_register();
     return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp());
   } else if (addr->index()->is_constant()) {
     intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp();
     assert(Assembler::is_simm32(addr_offset), "must be");
     return Address(base, addr_offset);
   } else {
     Unimplemented();
     return Address();
   }
 }
 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) {
   Address base = as_Address(addr);
   return Address(base._base, base._index, base._scale, base._disp + BytesPerWord);
 }
 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) {
   return as_Address(addr);
 }
 void LIR_Assembler::osr_entry() {
   offsets()->set_value(CodeOffsets::OSR_Entry, code_offset());
   BlockBegin* osr_entry = compilation()->hir()->osr_entry();
   ValueStack* entry_state = osr_entry->state();
   int number_of_locks = entry_state->locks_size();
   // we jump here if osr happens with the interpreter
   // state set up to continue at the beginning of the
   // loop that triggered osr - in particular, we have
   // the following registers setup:
   //
   // rcx: osr buffer
   //
   // build frame
   ciMethod* m = compilation()->method();
   __ build_frame(initial_frame_size_in_bytes());
   // OSR buffer is
   //
   // locals[nlocals-1..0]
   // monitors[0..number_of_locks]
   //
   // locals is a direct copy of the interpreter frame so in the osr buffer
   // so first slot in the local array is the last local from the interpreter
   // and last slot is local[0] (receiver) from the interpreter
   //
   // Similarly with locks. The first lock slot in the osr buffer is the nth lock
   // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock
   // in the interpreter frame (the method lock if a sync method)
   // Initialize monitors in the compiled activation.
   //   rcx: pointer to osr buffer
   //
   // All other registers are dead at this point and the locals will be
   // copied into place by code emitted in the IR.
   Register OSR_buf = osrBufferPointer()->as_pointer_register();
   { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below");
     int monitor_offset = BytesPerWord * method()->max_locals() +
       (2 * BytesPerWord) * (number_of_locks - 1);
     // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in
     // the OSR buffer using 2 word entries: first the lock and then
     // the oop.
     for (int i = 0; i < number_of_locks; i++) {
       int slot_offset = monitor_offset - ((i * 2) * BytesPerWord);
 #ifdef ASSERT
       // verify the interpreter's monitor has a non-null object
       {
         Label L;
         __ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), (int32_t)NULL_WORD);
         __ jcc(Assembler::notZero, L);
         __ stop("locked object is NULL");
         __ bind(L);
       }
 #endif
       __ movptr(rbx, Address(OSR_buf, slot_offset + 0));
       __ movptr(frame_map()->address_for_monitor_lock(i), rbx);
       __ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord));
       __ movptr(frame_map()->address_for_monitor_object(i), rbx);
     }
   }
 }
 // inline cache check; done before the frame is built.
 int LIR_Assembler::check_icache() {
   Register receiver = FrameMap::receiver_opr->as_register();
   Register ic_klass = IC_Klass;
   const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9);
   const bool do_post_padding = VerifyOops || UseCompressedOops;
   if (!do_post_padding) {
     // insert some nops so that the verified entry point is aligned on CodeEntryAlignment
     while ((__ offset() + ic_cmp_size) % CodeEntryAlignment != 0) {
       __ nop();
     }
   }
   int offset = __ offset();
   __ inline_cache_check(receiver, IC_Klass);
   assert(__ offset() % CodeEntryAlignment == 0 || do_post_padding, "alignment must be correct");
   if (do_post_padding) {
     // force alignment after the cache check.
     // It's been verified to be aligned if !VerifyOops
     __ align(CodeEntryAlignment);
   }
   return offset;
 }
 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) {
   jobject o = NULL;
   PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id);
   __ movoop(reg, o);
   patching_epilog(patch, lir_patch_normal, reg, info);
 }
 void LIR_Assembler::monitorexit(LIR_Opr obj_opr, LIR_Opr lock_opr, Register new_hdr, int monitor_no, Register exception) {
   if (exception->is_valid()) {
     // preserve exception
     // note: the monitor_exit runtime call is a leaf routine
     //       and cannot block => no GC can happen
     // The slow case (MonitorAccessStub) uses the first two stack slots
     // ([esp+0] and [esp+4]), therefore we store the exception at [esp+8]
     __ movptr (Address(rsp, 2*wordSize), exception);
   }
   Register obj_reg  = obj_opr->as_register();
   Register lock_reg = lock_opr->as_register();
   // setup registers (lock_reg must be rax, for lock_object)
   assert(obj_reg != SYNC_header && lock_reg != SYNC_header, "rax, must be available here");
   Register hdr = lock_reg;
   assert(new_hdr == SYNC_header, "wrong register");
   lock_reg = new_hdr;
   // compute pointer to BasicLock
   Address lock_addr = frame_map()->address_for_monitor_lock(monitor_no);
   __ lea(lock_reg, lock_addr);
   // unlock object
   MonitorAccessStub* slow_case = new MonitorExitStub(lock_opr, true, monitor_no);
   // _slow_case_stubs->append(slow_case);
   // temporary fix: must be created after exceptionhandler, therefore as call stub
   _slow_case_stubs->append(slow_case);
   if (UseFastLocking) {
     // try inlined fast unlocking first, revert to slow locking if it fails
     // note: lock_reg points to the displaced header since the displaced header offset is 0!
     assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
     __ unlock_object(hdr, obj_reg, lock_reg, *slow_case->entry());
   } else {
     // always do slow unlocking
     // note: the slow unlocking code could be inlined here, however if we use
     //       slow unlocking, speed doesn't matter anyway and this solution is
     //       simpler and requires less duplicated code - additionally, the
     //       slow unlocking code is the same in either case which simplifies
     //       debugging
     __ jmp(*slow_case->entry());
   }
   // done
   __ bind(*slow_case->continuation());
   if (exception->is_valid()) {
     // restore exception
     __ movptr (exception, Address(rsp, 2 * wordSize));
   }
 }
 // This specifies the rsp decrement needed to build the frame
 int LIR_Assembler::initial_frame_size_in_bytes() {
   // if rounding, must let FrameMap know!
   // The frame_map records size in slots (32bit word)
   // subtract two words to account for return address and link
   return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word))  * VMRegImpl::stack_slot_size;
 }
 int LIR_Assembler::emit_exception_handler() {
   // if the last instruction is a call (typically to do a throw which
   // is coming at the end after block reordering) the return address
   // must still point into the code area in order to avoid assertion
   // failures when searching for the corresponding bci => add a nop
   // (was bug 5/14/1999 - gri)
   __ nop();
   // generate code for exception handler
   address handler_base = __ start_a_stub(exception_handler_size);
   if (handler_base == NULL) {
     // not enough space left for the handler
     bailout("exception handler overflow");
     return -1;
   }
   int offset = code_offset();
   // the exception oop and pc are in rax, and rdx
   // no other registers need to be preserved, so invalidate them
   __ invalidate_registers(false, true, true, false, true, true);
   // check that there is really an exception
   __ verify_not_null_oop(rax);
   // search an exception handler (rax: exception oop, rdx: throwing pc)
   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id)));
   __ should_not_reach_here();
   assert(code_offset() - offset <= exception_handler_size, "overflow");
   __ end_a_stub();
   return offset;
 }
 // Emit the code to remove the frame from the stack in the exception
 // unwind path.
 int LIR_Assembler::emit_unwind_handler() {
 #ifndef PRODUCT
   if (CommentedAssembly) {
     _masm->block_comment("Unwind handler");
   }
 #endif
   int offset = code_offset();
   // Fetch the exception from TLS and clear out exception related thread state
   __ get_thread(rsi);
   __ movptr(rax, Address(rsi, JavaThread::exception_oop_offset()));
   __ movptr(Address(rsi, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD);
   __ movptr(Address(rsi, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD);
   __ bind(_unwind_handler_entry);
   __ verify_not_null_oop(rax);
   if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
     __ mov(rsi, rax);  // Preserve the exception
   }
   // Preform needed unlocking
   MonitorExitStub* stub = NULL;
   if (method()->is_synchronized()) {
     monitor_address(0, FrameMap::rax_opr);
     stub = new MonitorExitStub(FrameMap::rax_opr, true, 0);
     __ unlock_object(rdi, rbx, rax, *stub->entry());
     __ bind(*stub->continuation());
   }
   if (compilation()->env()->dtrace_method_probes()) {
     __ get_thread(rax);
     __ movptr(Address(rsp, 0), rax);
     __ movoop(Address(rsp, sizeof(void*)), method()->constant_encoding());
     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit)));
   }
   if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
     __ mov(rax, rsi);  // Restore the exception
   }
   // remove the activation and dispatch to the unwind handler
   __ remove_frame(initial_frame_size_in_bytes());
   __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id)));
   // Emit the slow path assembly
   if (stub != NULL) {
     stub->emit_code(this);
   }
   return offset;
 }
 int LIR_Assembler::emit_deopt_handler() {
   // if the last instruction is a call (typically to do a throw which
   // is coming at the end after block reordering) the return address
   // must still point into the code area in order to avoid assertion
   // failures when searching for the corresponding bci => add a nop
   // (was bug 5/14/1999 - gri)
   __ nop();
   // generate code for exception handler
   address handler_base = __ start_a_stub(deopt_handler_size);
   if (handler_base == NULL) {
     // not enough space left for the handler
     bailout("deopt handler overflow");
     return -1;
   }
   int offset = code_offset();
   InternalAddress here(__ pc());
   __ pushptr(here.addr());
   __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack()));
   assert(code_offset() - offset <= deopt_handler_size, "overflow");
   __ end_a_stub();
   return offset;
 }
 // This is the fast version of java.lang.String.compare; it has not
 // OSR-entry and therefore, we generate a slow version for OSR's
 void LIR_Assembler::emit_string_compare(LIR_Opr arg0, LIR_Opr arg1, LIR_Opr dst, CodeEmitInfo* info) {
   __ movptr (rbx, rcx); // receiver is in rcx
   __ movptr (rax, arg1->as_register());
   // Get addresses of first characters from both Strings
   __ load_heap_oop(rsi, Address(rax, java_lang_String::value_offset_in_bytes()));
   __ movptr       (rcx, Address(rax, java_lang_String::offset_offset_in_bytes()));
   __ lea          (rsi, Address(rsi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
   // rbx, may be NULL
   add_debug_info_for_null_check_here(info);
   __ load_heap_oop(rdi, Address(rbx, java_lang_String::value_offset_in_bytes()));
   __ movptr       (rcx, Address(rbx, java_lang_String::offset_offset_in_bytes()));
   __ lea          (rdi, Address(rdi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
   // compute minimum length (in rax) and difference of lengths (on top of stack)
   __ movl  (rbx, Address(rbx, java_lang_String::count_offset_in_bytes()));
   __ movl  (rax, Address(rax, java_lang_String::count_offset_in_bytes()));
   __ mov   (rcx, rbx);
   __ subptr(rbx, rax); // subtract lengths
   __ push  (rbx);      // result
   __ cmov  (Assembler::lessEqual, rax, rcx);
   // is minimum length 0?
   Label noLoop, haveResult;
   __ testptr (rax, rax);
   __ jcc (Assembler::zero, noLoop);
   // compare first characters
   __ load_unsigned_short(rcx, Address(rdi, 0));
   __ load_unsigned_short(rbx, Address(rsi, 0));
   __ subl(rcx, rbx);
   __ jcc(Assembler::notZero, haveResult);
   // starting loop
   __ decrement(rax); // we already tested index: skip one
   __ jcc(Assembler::zero, noLoop);
   // set rsi.edi to the end of the arrays (arrays have same length)
   // negate the index
   __ lea(rsi, Address(rsi, rax, Address::times_2, type2aelembytes(T_CHAR)));
   __ lea(rdi, Address(rdi, rax, Address::times_2, type2aelembytes(T_CHAR)));
   __ negptr(rax);
   // compare the strings in a loop
   Label loop;
   __ align(wordSize);
   __ bind(loop);
   __ load_unsigned_short(rcx, Address(rdi, rax, Address::times_2, 0));
   __ load_unsigned_short(rbx, Address(rsi, rax, Address::times_2, 0));
   __ subl(rcx, rbx);
   __ jcc(Assembler::notZero, haveResult);
   __ increment(rax);
   __ jcc(Assembler::notZero, loop);
   // strings are equal up to min length
   __ bind(noLoop);
   __ pop(rax);
   return_op(LIR_OprFact::illegalOpr);
   __ bind(haveResult);
   // leave instruction is going to discard the TOS value
   __ mov (rax, rcx); // result of call is in rax,
 }
 void LIR_Assembler::return_op(LIR_Opr result) {
   assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,");
   if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) {
     assert(result->fpu() == 0, "result must already be on TOS");
   }
   // Pop the stack before the safepoint code
   __ remove_frame(initial_frame_size_in_bytes());
   bool result_is_oop = result->is_valid() ? result->is_oop() : false;
   // Note: we do not need to round double result; float result has the right precision
   // the poll sets the condition code, but no data registers
   AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()),
                               relocInfo::poll_return_type);
   if (Assembler::is_polling_page_far()) {
     __ lea(rscratch1, polling_page);
     __ relocate(relocInfo::poll_return_type);
     __ testl(rax, Address(rscratch1, 0));
   } else {
     __ testl(rax, polling_page);
   }
   __ ret(0);
 }
 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
   AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()),
                               relocInfo::poll_type);
   guarantee(info != NULL, "Shouldn't be NULL");
   int offset = __ offset();
   if (Assembler::is_polling_page_far()) {
     __ lea(rscratch1, polling_page);
     offset = __ offset();
     add_debug_info_for_branch(info);
     __ testl(rax, Address(rscratch1, 0));
   } else {
     add_debug_info_for_branch(info);
     __ testl(rax, polling_page);
   }
   return offset;
 }
 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) {
   if (from_reg != to_reg) __ mov(to_reg, from_reg);
 }
 void LIR_Assembler::swap_reg(Register a, Register b) {
   __ xchgptr(a, b);
 }
 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
   assert(src->is_constant(), "should not call otherwise");
   assert(dest->is_register(), "should not call otherwise");
   LIR_Const* c = src->as_constant_ptr();
   switch (c->type()) {
     case T_INT: {
       assert(patch_code == lir_patch_none, "no patching handled here");
       __ movl(dest->as_register(), c->as_jint());
       break;
     }
     case T_ADDRESS: {
       assert(patch_code == lir_patch_none, "no patching handled here");
       __ movptr(dest->as_register(), c->as_jint());
       break;
     }
     case T_LONG: {
       assert(patch_code == lir_patch_none, "no patching handled here");
 #ifdef _LP64
       __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong());
 #else
       __ movptr(dest->as_register_lo(), c->as_jint_lo());
       __ movptr(dest->as_register_hi(), c->as_jint_hi());
 #endif // _LP64
       break;
     }
     case T_OBJECT: {
       if (patch_code != lir_patch_none) {
         jobject2reg_with_patching(dest->as_register(), info);
       } else {
         __ movoop(dest->as_register(), c->as_jobject());
       }
       break;
     }
     case T_FLOAT: {
       if (dest->is_single_xmm()) {
         if (c->is_zero_float()) {
           __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg());
         } else {
           __ movflt(dest->as_xmm_float_reg(),
                    InternalAddress(float_constant(c->as_jfloat())));
         }
       } else {
         assert(dest->is_single_fpu(), "must be");
         assert(dest->fpu_regnr() == 0, "dest must be TOS");
         if (c->is_zero_float()) {
           __ fldz();
         } else if (c->is_one_float()) {
           __ fld1();
         } else {
           __ fld_s (InternalAddress(float_constant(c->as_jfloat())));
         }
       }
       break;
     }
     case T_DOUBLE: {
       if (dest->is_double_xmm()) {
         if (c->is_zero_double()) {
           __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg());
         } else {
           __ movdbl(dest->as_xmm_double_reg(),
                     InternalAddress(double_constant(c->as_jdouble())));
         }
       } else {
         assert(dest->is_double_fpu(), "must be");
         assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
         if (c->is_zero_double()) {
           __ fldz();
         } else if (c->is_one_double()) {
           __ fld1();
         } else {
           __ fld_d (InternalAddress(double_constant(c->as_jdouble())));
         }
       }
       break;
     }
     default:
       ShouldNotReachHere();
   }
 }
 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) {
   assert(src->is_constant(), "should not call otherwise");
   assert(dest->is_stack(), "should not call otherwise");
   LIR_Const* c = src->as_constant_ptr();
   switch (c->type()) {
     case T_INT:  // fall through
     case T_FLOAT:
       __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
       break;
     case T_ADDRESS:
       __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
       break;
     case T_OBJECT:
       __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject());
       break;
     case T_LONG:  // fall through
     case T_DOUBLE:
 #ifdef _LP64
       __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
                                             lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits());
 #else
       __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
                                               lo_word_offset_in_bytes), c->as_jint_lo_bits());
       __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
                                               hi_word_offset_in_bytes), c->as_jint_hi_bits());
 #endif // _LP64
       break;
     default:
       ShouldNotReachHere();
   }
 }
 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) {
   assert(src->is_constant(), "should not call otherwise");
   assert(dest->is_address(), "should not call otherwise");
   LIR_Const* c = src->as_constant_ptr();
   LIR_Address* addr = dest->as_address_ptr();
   int null_check_here = code_offset();
   switch (type) {
     case T_INT:    // fall through
     case T_FLOAT:
       __ movl(as_Address(addr), c->as_jint_bits());
       break;
     case T_ADDRESS:
       __ movptr(as_Address(addr), c->as_jint_bits());
       break;
     case T_OBJECT:  // fall through
     case T_ARRAY:
       if (c->as_jobject() == NULL) {
         if (UseCompressedOops && !wide) {
           __ movl(as_Address(addr), (int32_t)NULL_WORD);
         } else {
           __ movptr(as_Address(addr), NULL_WORD);
         }
       } else {
         if (is_literal_address(addr)) {
           ShouldNotReachHere();
           __ movoop(as_Address(addr, noreg), c->as_jobject());
         } else {
 #ifdef _LP64
           __ movoop(rscratch1, c->as_jobject());
           if (UseCompressedOops && !wide) {
             __ encode_heap_oop(rscratch1);
             null_check_here = code_offset();
             __ movl(as_Address_lo(addr), rscratch1);
           } else {
             null_check_here = code_offset();
             __ movptr(as_Address_lo(addr), rscratch1);
           }
 #else
           __ movoop(as_Address(addr), c->as_jobject());
 #endif
         }
       }
       break;
     case T_LONG:    // fall through
     case T_DOUBLE:
 #ifdef _LP64
       if (is_literal_address(addr)) {
         ShouldNotReachHere();
         __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits());
       } else {
         __ movptr(r10, (intptr_t)c->as_jlong_bits());
         null_check_here = code_offset();
         __ movptr(as_Address_lo(addr), r10);
       }
 #else
       // Always reachable in 32bit so this doesn't produce useless move literal
       __ movptr(as_Address_hi(addr), c->as_jint_hi_bits());
       __ movptr(as_Address_lo(addr), c->as_jint_lo_bits());
 #endif // _LP64
       break;
     case T_BOOLEAN: // fall through
     case T_BYTE:
       __ movb(as_Address(addr), c->as_jint() & 0xFF);
       break;
     case T_CHAR:    // fall through
     case T_SHORT:
       __ movw(as_Address(addr), c->as_jint() & 0xFFFF);
       break;
     default:
       ShouldNotReachHere();
   };
   if (info != NULL) {
     add_debug_info_for_null_check(null_check_here, info);
   }
 }
 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) {
   assert(src->is_register(), "should not call otherwise");
   assert(dest->is_register(), "should not call otherwise");
   // move between cpu-registers
   if (dest->is_single_cpu()) {
 #ifdef _LP64
     if (src->type() == T_LONG) {
       // Can do LONG -> OBJECT
       move_regs(src->as_register_lo(), dest->as_register());
       return;
     }
 #endif
     assert(src->is_single_cpu(), "must match");
     if (src->type() == T_OBJECT) {
       __ verify_oop(src->as_register());
     }
     move_regs(src->as_register(), dest->as_register());
   } else if (dest->is_double_cpu()) {
 #ifdef _LP64
     if (src->type() == T_OBJECT || src->type() == T_ARRAY) {
       // Surprising to me but we can see move of a long to t_object
       __ verify_oop(src->as_register());
       move_regs(src->as_register(), dest->as_register_lo());
       return;
     }
 #endif
     assert(src->is_double_cpu(), "must match");
     Register f_lo = src->as_register_lo();
     Register f_hi = src->as_register_hi();
     Register t_lo = dest->as_register_lo();
     Register t_hi = dest->as_register_hi();
 #ifdef _LP64
     assert(f_hi == f_lo, "must be same");
     assert(t_hi == t_lo, "must be same");
     move_regs(f_lo, t_lo);
 #else
     assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation");
     if (f_lo == t_hi && f_hi == t_lo) {
       swap_reg(f_lo, f_hi);
     } else if (f_hi == t_lo) {
       assert(f_lo != t_hi, "overwriting register");
       move_regs(f_hi, t_hi);
       move_regs(f_lo, t_lo);
     } else {
       assert(f_hi != t_lo, "overwriting register");
       move_regs(f_lo, t_lo);
       move_regs(f_hi, t_hi);
     }
 #endif // LP64
     // special moves from fpu-register to xmm-register
     // necessary for method results
   } else if (src->is_single_xmm() && !dest->is_single_xmm()) {
     __ movflt(Address(rsp, 0), src->as_xmm_float_reg());
     __ fld_s(Address(rsp, 0));
   } else if (src->is_double_xmm() && !dest->is_double_xmm()) {
     __ movdbl(Address(rsp, 0), src->as_xmm_double_reg());
     __ fld_d(Address(rsp, 0));
   } else if (dest->is_single_xmm() && !src->is_single_xmm()) {
     __ fstp_s(Address(rsp, 0));
     __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0));
   } else if (dest->is_double_xmm() && !src->is_double_xmm()) {
     __ fstp_d(Address(rsp, 0));
     __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0));
     // move between xmm-registers
   } else if (dest->is_single_xmm()) {
     assert(src->is_single_xmm(), "must match");
     __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg());
   } else if (dest->is_double_xmm()) {
     assert(src->is_double_xmm(), "must match");
     __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg());
     // move between fpu-registers (no instruction necessary because of fpu-stack)
   } else if (dest->is_single_fpu() || dest->is_double_fpu()) {
     assert(src->is_single_fpu() || src->is_double_fpu(), "must match");
     assert(src->fpu() == dest->fpu(), "currently should be nothing to do");
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) {
   assert(src->is_register(), "should not call otherwise");
   assert(dest->is_stack(), "should not call otherwise");
   if (src->is_single_cpu()) {
     Address dst = frame_map()->address_for_slot(dest->single_stack_ix());
     if (type == T_OBJECT || type == T_ARRAY) {
       __ verify_oop(src->as_register());
       __ movptr (dst, src->as_register());
     } else {
       __ movl (dst, src->as_register());
     }
   } else if (src->is_double_cpu()) {
     Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes);
     Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes);
     __ movptr (dstLO, src->as_register_lo());
     NOT_LP64(__ movptr (dstHI, src->as_register_hi()));
   } else if (src->is_single_xmm()) {
     Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
     __ movflt(dst_addr, src->as_xmm_float_reg());
   } else if (src->is_double_xmm()) {
     Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
     __ movdbl(dst_addr, src->as_xmm_double_reg());
   } else if (src->is_single_fpu()) {
     assert(src->fpu_regnr() == 0, "argument must be on TOS");
     Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
     if (pop_fpu_stack)     __ fstp_s (dst_addr);
     else                   __ fst_s  (dst_addr);
   } else if (src->is_double_fpu()) {
     assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
     Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
     if (pop_fpu_stack)     __ fstp_d (dst_addr);
     else                   __ fst_d  (dst_addr);
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::reg2mem(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack, bool wide, bool /* unaligned */) {
   LIR_Address* to_addr = dest->as_address_ptr();
   PatchingStub* patch = NULL;
   Register compressed_src = rscratch1;
   if (type == T_ARRAY || type == T_OBJECT) {
     __ verify_oop(src->as_register());
 #ifdef _LP64
     if (UseCompressedOops && !wide) {
       __ movptr(compressed_src, src->as_register());
       __ encode_heap_oop(compressed_src);
     }
 #endif
   }
   if (patch_code != lir_patch_none) {
     patch = new PatchingStub(_masm, PatchingStub::access_field_id);
     Address toa = as_Address(to_addr);
     assert(toa.disp() != 0, "must have");
   }
   int null_check_here = code_offset();
   switch (type) {
     case T_FLOAT: {
       if (src->is_single_xmm()) {
         __ movflt(as_Address(to_addr), src->as_xmm_float_reg());
       } else {
         assert(src->is_single_fpu(), "must be");
         assert(src->fpu_regnr() == 0, "argument must be on TOS");
         if (pop_fpu_stack)      __ fstp_s(as_Address(to_addr));
         else                    __ fst_s (as_Address(to_addr));
       }
       break;
     }
     case T_DOUBLE: {
       if (src->is_double_xmm()) {
         __ movdbl(as_Address(to_addr), src->as_xmm_double_reg());
       } else {
         assert(src->is_double_fpu(), "must be");
         assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
         if (pop_fpu_stack)      __ fstp_d(as_Address(to_addr));
         else                    __ fst_d (as_Address(to_addr));
       }
       break;
     }
     case T_ARRAY:   // fall through
     case T_OBJECT:  // fall through
       if (UseCompressedOops && !wide) {
         __ movl(as_Address(to_addr), compressed_src);
       } else {
         __ movptr(as_Address(to_addr), src->as_register());
       }
       break;
     case T_ADDRESS:
       __ movptr(as_Address(to_addr), src->as_register());
       break;
     case T_INT:
       __ movl(as_Address(to_addr), src->as_register());
       break;
     case T_LONG: {
       Register from_lo = src->as_register_lo();
       Register from_hi = src->as_register_hi();
 #ifdef _LP64
       __ movptr(as_Address_lo(to_addr), from_lo);
 #else
       Register base = to_addr->base()->as_register();
       Register index = noreg;
       if (to_addr->index()->is_register()) {
         index = to_addr->index()->as_register();
       }
       if (base == from_lo || index == from_lo) {
         assert(base != from_hi, "can't be");
         assert(index == noreg || (index != base && index != from_hi), "can't handle this");
         __ movl(as_Address_hi(to_addr), from_hi);
         if (patch != NULL) {
           patching_epilog(patch, lir_patch_high, base, info);
           patch = new PatchingStub(_masm, PatchingStub::access_field_id);
           patch_code = lir_patch_low;
         }
         __ movl(as_Address_lo(to_addr), from_lo);
       } else {
         assert(index == noreg || (index != base && index != from_lo), "can't handle this");
         __ movl(as_Address_lo(to_addr), from_lo);
         if (patch != NULL) {
           patching_epilog(patch, lir_patch_low, base, info);
           patch = new PatchingStub(_masm, PatchingStub::access_field_id);
           patch_code = lir_patch_high;
         }
         __ movl(as_Address_hi(to_addr), from_hi);
       }
 #endif // _LP64
       break;
     }
     case T_BYTE:    // fall through
     case T_BOOLEAN: {
       Register src_reg = src->as_register();
       Address dst_addr = as_Address(to_addr);
       assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6");
       __ movb(dst_addr, src_reg);
       break;
     }
     case T_CHAR:    // fall through
     case T_SHORT:
       __ movw(as_Address(to_addr), src->as_register());
       break;
     default:
       ShouldNotReachHere();
   }
   if (info != NULL) {
     add_debug_info_for_null_check(null_check_here, info);
   }
   if (patch_code != lir_patch_none) {
     patching_epilog(patch, patch_code, to_addr->base()->as_register(), info);
   }
 }
 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
   assert(src->is_stack(), "should not call otherwise");
   assert(dest->is_register(), "should not call otherwise");
   if (dest->is_single_cpu()) {
     if (type == T_ARRAY || type == T_OBJECT) {
       __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
       __ verify_oop(dest->as_register());
     } else {
       __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
     }
   } else if (dest->is_double_cpu()) {
     Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes);
     Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes);
     __ movptr(dest->as_register_lo(), src_addr_LO);
     NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI));
   } else if (dest->is_single_xmm()) {
     Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
     __ movflt(dest->as_xmm_float_reg(), src_addr);
   } else if (dest->is_double_xmm()) {
     Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
     __ movdbl(dest->as_xmm_double_reg(), src_addr);
   } else if (dest->is_single_fpu()) {
     assert(dest->fpu_regnr() == 0, "dest must be TOS");
     Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
     __ fld_s(src_addr);
   } else if (dest->is_double_fpu()) {
     assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
     Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
     __ fld_d(src_addr);
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
   if (src->is_single_stack()) {
     if (type == T_OBJECT || type == T_ARRAY) {
       __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix()));
       __ popptr (frame_map()->address_for_slot(dest->single_stack_ix()));
     } else {
 #ifndef _LP64
       __ pushl(frame_map()->address_for_slot(src ->single_stack_ix()));
       __ popl (frame_map()->address_for_slot(dest->single_stack_ix()));
 #else
       //no pushl on 64bits
       __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix()));
       __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1);
 #endif
     }
   } else if (src->is_double_stack()) {
 #ifdef _LP64
     __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix()));
     __ popptr (frame_map()->address_for_slot(dest->double_stack_ix()));
 #else
     __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0));
     // push and pop the part at src + wordSize, adding wordSize for the previous push
     __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize));
     __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize));
     __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0));
 #endif // _LP64
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) {
   assert(src->is_address(), "should not call otherwise");
   assert(dest->is_register(), "should not call otherwise");
   LIR_Address* addr = src->as_address_ptr();
   Address from_addr = as_Address(addr);
   switch (type) {
     case T_BOOLEAN: // fall through
     case T_BYTE:    // fall through
     case T_CHAR:    // fall through
     case T_SHORT:
       if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) {
         // on pre P6 processors we may get partial register stalls
         // so blow away the value of to_rinfo before loading a
         // partial word into it.  Do it here so that it precedes
         // the potential patch point below.
         __ xorptr(dest->as_register(), dest->as_register());
       }
       break;
   }
   PatchingStub* patch = NULL;
   if (patch_code != lir_patch_none) {
     patch = new PatchingStub(_masm, PatchingStub::access_field_id);
     assert(from_addr.disp() != 0, "must have");
   }
   if (info != NULL) {
     add_debug_info_for_null_check_here(info);
   }
   switch (type) {
     case T_FLOAT: {
       if (dest->is_single_xmm()) {
         __ movflt(dest->as_xmm_float_reg(), from_addr);
       } else {
         assert(dest->is_single_fpu(), "must be");
         assert(dest->fpu_regnr() == 0, "dest must be TOS");
         __ fld_s(from_addr);
       }
       break;
     }
     case T_DOUBLE: {
       if (dest->is_double_xmm()) {
         __ movdbl(dest->as_xmm_double_reg(), from_addr);
       } else {
         assert(dest->is_double_fpu(), "must be");
         assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
         __ fld_d(from_addr);
       }
       break;
     }
     case T_OBJECT:  // fall through
     case T_ARRAY:   // fall through
       if (UseCompressedOops && !wide) {
         __ movl(dest->as_register(), from_addr);
       } else {
         __ movptr(dest->as_register(), from_addr);
       }
       break;
     case T_ADDRESS:
       __ movptr(dest->as_register(), from_addr);
       break;
     case T_INT:
       __ movl(dest->as_register(), from_addr);
       break;
     case T_LONG: {
       Register to_lo = dest->as_register_lo();
       Register to_hi = dest->as_register_hi();
 #ifdef _LP64
       __ movptr(to_lo, as_Address_lo(addr));
 #else
       Register base = addr->base()->as_register();
       Register index = noreg;
       if (addr->index()->is_register()) {
         index = addr->index()->as_register();
       }
       if ((base == to_lo && index == to_hi) ||
           (base == to_hi && index == to_lo)) {
         // addresses with 2 registers are only formed as a result of
         // array access so this code will never have to deal with
         // patches or null checks.
         assert(info == NULL && patch == NULL, "must be");
         __ lea(to_hi, as_Address(addr));
         __ movl(to_lo, Address(to_hi, 0));
         __ movl(to_hi, Address(to_hi, BytesPerWord));
       } else if (base == to_lo || index == to_lo) {
         assert(base != to_hi, "can't be");
         assert(index == noreg || (index != base && index != to_hi), "can't handle this");
         __ movl(to_hi, as_Address_hi(addr));
         if (patch != NULL) {
           patching_epilog(patch, lir_patch_high, base, info);
           patch = new PatchingStub(_masm, PatchingStub::access_field_id);
           patch_code = lir_patch_low;
         }
         __ movl(to_lo, as_Address_lo(addr));
       } else {
         assert(index == noreg || (index != base && index != to_lo), "can't handle this");
         __ movl(to_lo, as_Address_lo(addr));
         if (patch != NULL) {
           patching_epilog(patch, lir_patch_low, base, info);
           patch = new PatchingStub(_masm, PatchingStub::access_field_id);
           patch_code = lir_patch_high;
         }
         __ movl(to_hi, as_Address_hi(addr));
       }
 #endif // _LP64
       break;
     }
     case T_BOOLEAN: // fall through
     case T_BYTE: {
       Register dest_reg = dest->as_register();
       assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
       if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
         __ movsbl(dest_reg, from_addr);
       } else {
         __ movb(dest_reg, from_addr);
         __ shll(dest_reg, 24);
         __ sarl(dest_reg, 24);
       }
       break;
     }
     case T_CHAR: {
       Register dest_reg = dest->as_register();
       assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
       if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
         __ movzwl(dest_reg, from_addr);
       } else {
         __ movw(dest_reg, from_addr);
       }
       break;
     }
     case T_SHORT: {
       Register dest_reg = dest->as_register();
       if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
         __ movswl(dest_reg, from_addr);
       } else {
         __ movw(dest_reg, from_addr);
         __ shll(dest_reg, 16);
         __ sarl(dest_reg, 16);
       }
       break;
     }
     default:
       ShouldNotReachHere();
   }
   if (patch != NULL) {
     patching_epilog(patch, patch_code, addr->base()->as_register(), info);
   }
   if (type == T_ARRAY || type == T_OBJECT) {
 #ifdef _LP64
     if (UseCompressedOops && !wide) {
       __ decode_heap_oop(dest->as_register());
     }
 #endif
     __ verify_oop(dest->as_register());
   }
 }
 void LIR_Assembler::prefetchr(LIR_Opr src) {
   LIR_Address* addr = src->as_address_ptr();
   Address from_addr = as_Address(addr);
   if (VM_Version::supports_sse()) {
     switch (ReadPrefetchInstr) {
       case 0:
         __ prefetchnta(from_addr); break;
       case 1:
         __ prefetcht0(from_addr); break;
       case 2:
         __ prefetcht2(from_addr); break;
       default:
         ShouldNotReachHere(); break;
     }
   } else if (VM_Version::supports_3dnow()) {
     __ prefetchr(from_addr);
   }
 }
 void LIR_Assembler::prefetchw(LIR_Opr src) {
   LIR_Address* addr = src->as_address_ptr();
   Address from_addr = as_Address(addr);
   if (VM_Version::supports_sse()) {
     switch (AllocatePrefetchInstr) {
       case 0:
         __ prefetchnta(from_addr); break;
       case 1:
         __ prefetcht0(from_addr); break;
       case 2:
         __ prefetcht2(from_addr); break;
       case 3:
         __ prefetchw(from_addr); break;
       default:
         ShouldNotReachHere(); break;
     }
   } else if (VM_Version::supports_3dnow()) {
     __ prefetchw(from_addr);
   }
 }
 NEEDS_CLEANUP; // This could be static?
 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const {
   int elem_size = type2aelembytes(type);
   switch (elem_size) {
     case 1: return Address::times_1;
     case 2: return Address::times_2;
     case 4: return Address::times_4;
     case 8: return Address::times_8;
   }
   ShouldNotReachHere();
   return Address::no_scale;
 }
 void LIR_Assembler::emit_op3(LIR_Op3* op) {
   switch (op->code()) {
     case lir_idiv:
     case lir_irem:
       arithmetic_idiv(op->code(),
                       op->in_opr1(),
                       op->in_opr2(),
                       op->in_opr3(),
                       op->result_opr(),
                       op->info());
       break;
     default:      ShouldNotReachHere(); break;
   }
 }
 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) {
 #ifdef ASSERT
   assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label");
   if (op->block() != NULL)  _branch_target_blocks.append(op->block());
   if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock());
 #endif
   if (op->cond() == lir_cond_always) {
     if (op->info() != NULL) add_debug_info_for_branch(op->info());
     __ jmp (*(op->label()));
   } else {
     Assembler::Condition acond = Assembler::zero;
     if (op->code() == lir_cond_float_branch) {
       assert(op->ublock() != NULL, "must have unordered successor");
       __ jcc(Assembler::parity, *(op->ublock()->label()));
       switch(op->cond()) {
         case lir_cond_equal:        acond = Assembler::equal;      break;
         case lir_cond_notEqual:     acond = Assembler::notEqual;   break;
         case lir_cond_less:         acond = Assembler::below;      break;
         case lir_cond_lessEqual:    acond = Assembler::belowEqual; break;
         case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break;
         case lir_cond_greater:      acond = Assembler::above;      break;
         default:                         ShouldNotReachHere();
       }
     } else {
       switch (op->cond()) {
         case lir_cond_equal:        acond = Assembler::equal;       break;
         case lir_cond_notEqual:     acond = Assembler::notEqual;    break;
         case lir_cond_less:         acond = Assembler::less;        break;
         case lir_cond_lessEqual:    acond = Assembler::lessEqual;   break;
         case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
         case lir_cond_greater:      acond = Assembler::greater;     break;
         case lir_cond_belowEqual:   acond = Assembler::belowEqual;  break;
         case lir_cond_aboveEqual:   acond = Assembler::aboveEqual;  break;
         default:                         ShouldNotReachHere();
       }
     }
     __ jcc(acond,*(op->label()));
   }
 }
 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) {
   LIR_Opr src  = op->in_opr();
   LIR_Opr dest = op->result_opr();
   switch (op->bytecode()) {
     case Bytecodes::_i2l:
 #ifdef _LP64
       __ movl2ptr(dest->as_register_lo(), src->as_register());
 #else
       move_regs(src->as_register(), dest->as_register_lo());
       move_regs(src->as_register(), dest->as_register_hi());
       __ sarl(dest->as_register_hi(), 31);
 #endif // LP64
       break;
     case Bytecodes::_l2i:
       move_regs(src->as_register_lo(), dest->as_register());
       break;
     case Bytecodes::_i2b:
       move_regs(src->as_register(), dest->as_register());
       __ sign_extend_byte(dest->as_register());
       break;
     case Bytecodes::_i2c:
       move_regs(src->as_register(), dest->as_register());
       __ andl(dest->as_register(), 0xFFFF);
       break;
     case Bytecodes::_i2s:
       move_regs(src->as_register(), dest->as_register());
       __ sign_extend_short(dest->as_register());
       break;
     case Bytecodes::_f2d:
     case Bytecodes::_d2f:
       if (dest->is_single_xmm()) {
         __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg());
       } else if (dest->is_double_xmm()) {
         __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg());
       } else {
         assert(src->fpu() == dest->fpu(), "register must be equal");
         // do nothing (float result is rounded later through spilling)
       }
       break;
     case Bytecodes::_i2f:
     case Bytecodes::_i2d:
       if (dest->is_single_xmm()) {
         __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register());
       } else if (dest->is_double_xmm()) {
         __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register());
       } else {
         assert(dest->fpu() == 0, "result must be on TOS");
         __ movl(Address(rsp, 0), src->as_register());
         __ fild_s(Address(rsp, 0));
       }
       break;
     case Bytecodes::_f2i:
     case Bytecodes::_d2i:
       if (src->is_single_xmm()) {
         __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg());
       } else if (src->is_double_xmm()) {
         __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg());
       } else {
         assert(src->fpu() == 0, "input must be on TOS");
         __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc()));
         __ fist_s(Address(rsp, 0));
         __ movl(dest->as_register(), Address(rsp, 0));
         __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
       }
       // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
       assert(op->stub() != NULL, "stub required");
       __ cmpl(dest->as_register(), 0x80000000);
       __ jcc(Assembler::equal, *op->stub()->entry());
       __ bind(*op->stub()->continuation());
       break;
     case Bytecodes::_l2f:
     case Bytecodes::_l2d:
       assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)");
       assert(dest->fpu() == 0, "result must be on TOS");
       __ movptr(Address(rsp, 0),            src->as_register_lo());
       NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi()));
       __ fild_d(Address(rsp, 0));
       // float result is rounded later through spilling
       break;
     case Bytecodes::_f2l:
     case Bytecodes::_d2l:
       assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)");
       assert(src->fpu() == 0, "input must be on TOS");
       assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers");
       // instruction sequence too long to inline it here
       {
         __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id)));
       }
       break;
     default: ShouldNotReachHere();
   }
 }
 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
   if (op->init_check()) {
     __ cmpl(Address(op->klass()->as_register(),
                     instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc)),
             instanceKlass::fully_initialized);
     add_debug_info_for_null_check_here(op->stub()->info());
     __ jcc(Assembler::notEqual, *op->stub()->entry());
   }
   __ allocate_object(op->obj()->as_register(),
                      op->tmp1()->as_register(),
                      op->tmp2()->as_register(),
                      op->header_size(),
                      op->object_size(),
                      op->klass()->as_register(),
                      *op->stub()->entry());
   __ bind(*op->stub()->continuation());
 }
 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
   Register len =  op->len()->as_register();
   LP64_ONLY( __ movslq(len, len); )
   if (UseSlowPath ||
       (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) ||
       (!UseFastNewTypeArray   && (op->type() != T_OBJECT && op->type() != T_ARRAY))) {
     __ jmp(*op->stub()->entry());
   } else {
     Register tmp1 = op->tmp1()->as_register();
     Register tmp2 = op->tmp2()->as_register();
     Register tmp3 = op->tmp3()->as_register();
     if (len == tmp1) {
       tmp1 = tmp3;
     } else if (len == tmp2) {
       tmp2 = tmp3;
     } else if (len == tmp3) {
       // everything is ok
     } else {
       __ mov(tmp3, len);
     }
     __ allocate_array(op->obj()->as_register(),
                       len,
                       tmp1,
                       tmp2,
                       arrayOopDesc::header_size(op->type()),
                       array_element_size(op->type()),
                       op->klass()->as_register(),
                       *op->stub()->entry());
   }
   __ bind(*op->stub()->continuation());
 }
 void LIR_Assembler::type_profile_helper(Register mdo,
                                         ciMethodData *md, ciProfileData *data,
                                         Register recv, Label* update_done) {
   for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
     Label next_test;
     // See if the receiver is receiver[n].
     __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
     __ jccb(Assembler::notEqual, next_test);
     Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)));
     __ addptr(data_addr, DataLayout::counter_increment);
     __ jmp(*update_done);
     __ bind(next_test);
   }
   // Didn't find receiver; find next empty slot and fill it in
   for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
     Label next_test;
     Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)));
     __ cmpptr(recv_addr, (intptr_t)NULL_WORD);
     __ jccb(Assembler::notEqual, next_test);
     __ movptr(recv_addr, recv);
     __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment);
     __ jmp(*update_done);
     __ bind(next_test);
   }
 }
 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) {
   // we always need a stub for the failure case.
   CodeStub* stub = op->stub();
   Register obj = op->object()->as_register();
   Register k_RInfo = op->tmp1()->as_register();
   Register klass_RInfo = op->tmp2()->as_register();
   Register dst = op->result_opr()->as_register();
   ciKlass* k = op->klass();
   Register Rtmp1 = noreg;
   // check if it needs to be profiled
   ciMethodData* md;
   ciProfileData* data;
   if (op->should_profile()) {
     ciMethod* method = op->profiled_method();
     assert(method != NULL, "Should have method");
     int bci = op->profiled_bci();
     md = method->method_data_or_null();
     assert(md != NULL, "Sanity");
     data = md->bci_to_data(bci);
     assert(data != NULL,                "need data for type check");
     assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
   }
   Label profile_cast_success, profile_cast_failure;
   Label *success_target = op->should_profile() ? &profile_cast_success : success;
   Label *failure_target = op->should_profile() ? &profile_cast_failure : failure;
   if (obj == k_RInfo) {
     k_RInfo = dst;
   } else if (obj == klass_RInfo) {
     klass_RInfo = dst;
   }
   if (k->is_loaded() && !UseCompressedOops) {
     select_different_registers(obj, dst, k_RInfo, klass_RInfo);
   } else {
     Rtmp1 = op->tmp3()->as_register();
     select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1);
   }
   assert_different_registers(obj, k_RInfo, klass_RInfo);
   if (!k->is_loaded()) {
     jobject2reg_with_patching(k_RInfo, op->info_for_patch());
   } else {
 #ifdef _LP64
     __ movoop(k_RInfo, k->constant_encoding());
 #endif // _LP64
   }
   assert(obj != k_RInfo, "must be different");
   __ cmpptr(obj, (int32_t)NULL_WORD);
   if (op->should_profile()) {
     Label not_null;
     __ jccb(Assembler::notEqual, not_null);
     // Object is null; update MDO and exit
     Register mdo  = klass_RInfo;
     __ movoop(mdo, md->constant_encoding());
     Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
     int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
     __ orl(data_addr, header_bits);
     __ jmp(*obj_is_null);
     __ bind(not_null);
   } else {
     __ jcc(Assembler::equal, *obj_is_null);
   }
   __ verify_oop(obj);
   if (op->fast_check()) {
     // get object class
     // not a safepoint as obj null check happens earlier
 #ifdef _LP64
     if (UseCompressedOops) {
       __ load_klass(Rtmp1, obj);
       __ cmpptr(k_RInfo, Rtmp1);
     } else {
       __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
     }
 #else
     if (k->is_loaded()) {
       __ cmpoop(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding());
     } else {
       __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
     }
 #endif
     __ jcc(Assembler::notEqual, *failure_target);
     // successful cast, fall through to profile or jump
   } else {
     // get object class
     // not a safepoint as obj null check happens earlier
     __ load_klass(klass_RInfo, obj);
     if (k->is_loaded()) {
       // See if we get an immediate positive hit
 #ifdef _LP64
       __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset()));
 #else
       __ cmpoop(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding());
 #endif // _LP64
       if (sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes() != k->super_check_offset()) {
         __ jcc(Assembler::notEqual, *failure_target);
         // successful cast, fall through to profile or jump
       } else {
         // See if we get an immediate positive hit
         __ jcc(Assembler::equal, *success_target);
         // check for self
 #ifdef _LP64
         __ cmpptr(klass_RInfo, k_RInfo);
 #else
         __ cmpoop(klass_RInfo, k->constant_encoding());
 #endif // _LP64
         __ jcc(Assembler::equal, *success_target);
         __ push(klass_RInfo);
 #ifdef _LP64
         __ push(k_RInfo);
 #else
         __ pushoop(k->constant_encoding());
 #endif // _LP64
         __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
         __ pop(klass_RInfo);
         __ pop(klass_RInfo);
         // result is a boolean
         __ cmpl(klass_RInfo, 0);
         __ jcc(Assembler::equal, *failure_target);
         // successful cast, fall through to profile or jump
       }
     } else {
       // perform the fast part of the checking logic
       __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
       // call out-of-line instance of __ check_klass_subtype_slow_path(...):
       __ push(klass_RInfo);
       __ push(k_RInfo);
       __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
       __ pop(klass_RInfo);
       __ pop(k_RInfo);
       // result is a boolean
       __ cmpl(k_RInfo, 0);
       __ jcc(Assembler::equal, *failure_target);
       // successful cast, fall through to profile or jump
     }
   }
   if (op->should_profile()) {
     Register mdo  = klass_RInfo, recv = k_RInfo;
     __ bind(profile_cast_success);
     __ movoop(mdo, md->constant_encoding());
     __ load_klass(recv, obj);
     Label update_done;
     type_profile_helper(mdo, md, data, recv, success);
     __ jmp(*success);
     __ bind(profile_cast_failure);
     __ movoop(mdo, md->constant_encoding());
     Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
     __ subptr(counter_addr, DataLayout::counter_increment);
     __ jmp(*failure);
   }
   __ jmp(*success);
 }
 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
   LIR_Code code = op->code();
   if (code == lir_store_check) {
     Register value = op->object()->as_register();
     Register array = op->array()->as_register();
     Register k_RInfo = op->tmp1()->as_register();
     Register klass_RInfo = op->tmp2()->as_register();
     Register Rtmp1 = op->tmp3()->as_register();
     CodeStub* stub = op->stub();
     // check if it needs to be profiled
     ciMethodData* md;
     ciProfileData* data;
     if (op->should_profile()) {
       ciMethod* method = op->profiled_method();
       assert(method != NULL, "Should have method");
       int bci = op->profiled_bci();
       md = method->method_data_or_null();
       assert(md != NULL, "Sanity");
       data = md->bci_to_data(bci);
       assert(data != NULL,                "need data for type check");
       assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
     }
     Label profile_cast_success, profile_cast_failure, done;
     Label *success_target = op->should_profile() ? &profile_cast_success : &done;
     Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry();
     __ cmpptr(value, (int32_t)NULL_WORD);
     if (op->should_profile()) {
       Label not_null;
       __ jccb(Assembler::notEqual, not_null);
       // Object is null; update MDO and exit
       Register mdo  = klass_RInfo;
       __ movoop(mdo, md->constant_encoding());
       Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
       int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
       __ orl(data_addr, header_bits);
       __ jmp(done);
       __ bind(not_null);
     } else {
       __ jcc(Assembler::equal, done);
     }
     add_debug_info_for_null_check_here(op->info_for_exception());
     __ load_klass(k_RInfo, array);
     __ load_klass(klass_RInfo, value);
     // get instance klass (it's already uncompressed)
     __ movptr(k_RInfo, Address(k_RInfo, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc)));
     // perform the fast part of the checking logic
     __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
     // call out-of-line instance of __ check_klass_subtype_slow_path(...):
     __ push(klass_RInfo);
     __ push(k_RInfo);
     __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
     __ pop(klass_RInfo);
     __ pop(k_RInfo);
     // result is a boolean
     __ cmpl(k_RInfo, 0);
     __ jcc(Assembler::equal, *failure_target);
     // fall through to the success case
     if (op->should_profile()) {
       Register mdo  = klass_RInfo, recv = k_RInfo;
       __ bind(profile_cast_success);
       __ movoop(mdo, md->constant_encoding());
       __ load_klass(recv, value);
       Label update_done;
       type_profile_helper(mdo, md, data, recv, &done);
       __ jmpb(done);
       __ bind(profile_cast_failure);
       __ movoop(mdo, md->constant_encoding());
       Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
       __ subptr(counter_addr, DataLayout::counter_increment);
       __ jmp(*stub->entry());
     }
     __ bind(done);
   } else
     if (code == lir_checkcast) {
       Register obj = op->object()->as_register();
       Register dst = op->result_opr()->as_register();
       Label success;
       emit_typecheck_helper(op, &success, op->stub()->entry(), &success);
       __ bind(success);
       if (dst != obj) {
         __ mov(dst, obj);
       }
     } else
       if (code == lir_instanceof) {
         Register obj = op->object()->as_register();
         Register dst = op->result_opr()->as_register();
         Label success, failure, done;
         emit_typecheck_helper(op, &success, &failure, &failure);
         __ bind(failure);
         __ xorptr(dst, dst);
         __ jmpb(done);
         __ bind(success);
         __ movptr(dst, 1);
         __ bind(done);
       } else {
         ShouldNotReachHere();
       }
 }
 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) {
   if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) {
     assert(op->cmp_value()->as_register_lo() == rax, "wrong register");
     assert(op->cmp_value()->as_register_hi() == rdx, "wrong register");
     assert(op->new_value()->as_register_lo() == rbx, "wrong register");
     assert(op->new_value()->as_register_hi() == rcx, "wrong register");
     Register addr = op->addr()->as_register();
     if (os::is_MP()) {
       __ lock();
     }
     NOT_LP64(__ cmpxchg8(Address(addr, 0)));
   } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) {
     NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");)
     Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
     Register newval = op->new_value()->as_register();
     Register cmpval = op->cmp_value()->as_register();
     assert(cmpval == rax, "wrong register");
     assert(newval != NULL, "new val must be register");
     assert(cmpval != newval, "cmp and new values must be in different registers");
     assert(cmpval != addr, "cmp and addr must be in different registers");
     assert(newval != addr, "new value and addr must be in different registers");
     if ( op->code() == lir_cas_obj) {
 #ifdef _LP64
       if (UseCompressedOops) {
         __ encode_heap_oop(cmpval);
         __ mov(rscratch1, newval);
         __ encode_heap_oop(rscratch1);
         if (os::is_MP()) {
           __ lock();
         }
         // cmpval (rax) is implicitly used by this instruction
         __ cmpxchgl(rscratch1, Address(addr, 0));
       } else
 #endif
       {
         if (os::is_MP()) {
           __ lock();
         }
         __ cmpxchgptr(newval, Address(addr, 0));
       }
     } else {
       assert(op->code() == lir_cas_int, "lir_cas_int expected");
       if (os::is_MP()) {
         __ lock();
       }
       __ cmpxchgl(newval, Address(addr, 0));
     }
 #ifdef _LP64
   } else if (op->code() == lir_cas_long) {
     Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
     Register newval = op->new_value()->as_register_lo();
     Register cmpval = op->cmp_value()->as_register_lo();
     assert(cmpval == rax, "wrong register");
     assert(newval != NULL, "new val must be register");
     assert(cmpval != newval, "cmp and new values must be in different registers");
     assert(cmpval != addr, "cmp and addr must be in different registers");
     assert(newval != addr, "new value and addr must be in different registers");
     if (os::is_MP()) {
       __ lock();
     }
     __ cmpxchgq(newval, Address(addr, 0));
 #endif // _LP64
   } else {
     Unimplemented();
   }
 }
 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) {
   Assembler::Condition acond, ncond;
   switch (condition) {
     case lir_cond_equal:        acond = Assembler::equal;        ncond = Assembler::notEqual;     break;
     case lir_cond_notEqual:     acond = Assembler::notEqual;     ncond = Assembler::equal;        break;
     case lir_cond_less:         acond = Assembler::less;         ncond = Assembler::greaterEqual; break;
     case lir_cond_lessEqual:    acond = Assembler::lessEqual;    ncond = Assembler::greater;      break;
     case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less;         break;
     case lir_cond_greater:      acond = Assembler::greater;      ncond = Assembler::lessEqual;    break;
     case lir_cond_belowEqual:   acond = Assembler::belowEqual;   ncond = Assembler::above;        break;
     case lir_cond_aboveEqual:   acond = Assembler::aboveEqual;   ncond = Assembler::below;        break;
     default:                    ShouldNotReachHere();
   }
   if (opr1->is_cpu_register()) {
     reg2reg(opr1, result);
   } else if (opr1->is_stack()) {
     stack2reg(opr1, result, result->type());
   } else if (opr1->is_constant()) {
     const2reg(opr1, result, lir_patch_none, NULL);
   } else {
     ShouldNotReachHere();
   }
   if (VM_Version::supports_cmov() && !opr2->is_constant()) {
     // optimized version that does not require a branch
     if (opr2->is_single_cpu()) {
       assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move");
       __ cmov(ncond, result->as_register(), opr2->as_register());
     } else if (opr2->is_double_cpu()) {
       assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
       assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
       __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo());
       NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());)
     } else if (opr2->is_single_stack()) {
       __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix()));
     } else if (opr2->is_double_stack()) {
       __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes));
       NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));)
     } else {
       ShouldNotReachHere();
     }
   } else {
     Label skip;
     __ jcc (acond, skip);
     if (opr2->is_cpu_register()) {
       reg2reg(opr2, result);
     } else if (opr2->is_stack()) {
       stack2reg(opr2, result, result->type());
     } else if (opr2->is_constant()) {
       const2reg(opr2, result, lir_patch_none, NULL);
     } else {
       ShouldNotReachHere();
     }
     __ bind(skip);
   }
 }
 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) {
   assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method");
   if (left->is_single_cpu()) {
     assert(left == dest, "left and dest must be equal");
     Register lreg = left->as_register();
     if (right->is_single_cpu()) {
       // cpu register - cpu register
       Register rreg = right->as_register();
       switch (code) {
         case lir_add: __ addl (lreg, rreg); break;
         case lir_sub: __ subl (lreg, rreg); break;
         case lir_mul: __ imull(lreg, rreg); break;
         default:      ShouldNotReachHere();
       }
     } else if (right->is_stack()) {
       // cpu register - stack
       Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
       switch (code) {
         case lir_add: __ addl(lreg, raddr); break;
         case lir_sub: __ subl(lreg, raddr); break;
         default:      ShouldNotReachHere();
       }
     } else if (right->is_constant()) {
       // cpu register - constant
       jint c = right->as_constant_ptr()->as_jint();
       switch (code) {
         case lir_add: {
           __ incrementl(lreg, c);
           break;
         }
         case lir_sub: {
           __ decrementl(lreg, c);
           break;
         }
         default: ShouldNotReachHere();
       }
     } else {
       ShouldNotReachHere();
     }
   } else if (left->is_double_cpu()) {
     assert(left == dest, "left and dest must be equal");
     Register lreg_lo = left->as_register_lo();
     Register lreg_hi = left->as_register_hi();
     if (right->is_double_cpu()) {
       // cpu register - cpu register
       Register rreg_lo = right->as_register_lo();
       Register rreg_hi = right->as_register_hi();
       NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi));
       LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo));
       switch (code) {
         case lir_add:
           __ addptr(lreg_lo, rreg_lo);
           NOT_LP64(__ adcl(lreg_hi, rreg_hi));
           break;
         case lir_sub:
           __ subptr(lreg_lo, rreg_lo);
           NOT_LP64(__ sbbl(lreg_hi, rreg_hi));
           break;
         case lir_mul:
 #ifdef _LP64
           __ imulq(lreg_lo, rreg_lo);
 #else
           assert(lreg_lo == rax && lreg_hi == rdx, "must be");
           __ imull(lreg_hi, rreg_lo);
           __ imull(rreg_hi, lreg_lo);
           __ addl (rreg_hi, lreg_hi);
           __ mull (rreg_lo);
           __ addl (lreg_hi, rreg_hi);
 #endif // _LP64
           break;
         default:
           ShouldNotReachHere();
       }
     } else if (right->is_constant()) {
       // cpu register - constant
 #ifdef _LP64
       jlong c = right->as_constant_ptr()->as_jlong_bits();
       __ movptr(r10, (intptr_t) c);
       switch (code) {
         case lir_add:
           __ addptr(lreg_lo, r10);
           break;
         case lir_sub:
           __ subptr(lreg_lo, r10);
           break;
         default:
           ShouldNotReachHere();
       }
 #else
       jint c_lo = right->as_constant_ptr()->as_jint_lo();
       jint c_hi = right->as_constant_ptr()->as_jint_hi();
       switch (code) {
         case lir_add:
           __ addptr(lreg_lo, c_lo);
           __ adcl(lreg_hi, c_hi);
           break;
         case lir_sub:
           __ subptr(lreg_lo, c_lo);
           __ sbbl(lreg_hi, c_hi);
           break;
         default:
           ShouldNotReachHere();
       }
 #endif // _LP64
     } else {
       ShouldNotReachHere();
     }
   } else if (left->is_single_xmm()) {
     assert(left == dest, "left and dest must be equal");
     XMMRegister lreg = left->as_xmm_float_reg();
     if (right->is_single_xmm()) {
       XMMRegister rreg = right->as_xmm_float_reg();
       switch (code) {
         case lir_add: __ addss(lreg, rreg);  break;
         case lir_sub: __ subss(lreg, rreg);  break;
         case lir_mul_strictfp: // fall through
         case lir_mul: __ mulss(lreg, rreg);  break;
         case lir_div_strictfp: // fall through
         case lir_div: __ divss(lreg, rreg);  break;
         default: ShouldNotReachHere();
       }
     } else {
       Address raddr;
       if (right->is_single_stack()) {
         raddr = frame_map()->address_for_slot(right->single_stack_ix());
       } else if (right->is_constant()) {
         // hack for now
         raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat())));
       } else {
         ShouldNotReachHere();
       }
       switch (code) {
         case lir_add: __ addss(lreg, raddr);  break;
         case lir_sub: __ subss(lreg, raddr);  break;
         case lir_mul_strictfp: // fall through
         case lir_mul: __ mulss(lreg, raddr);  break;
         case lir_div_strictfp: // fall through
         case lir_div: __ divss(lreg, raddr);  break;
         default: ShouldNotReachHere();
       }
     }
   } else if (left->is_double_xmm()) {
     assert(left == dest, "left and dest must be equal");
     XMMRegister lreg = left->as_xmm_double_reg();
     if (right->is_double_xmm()) {
       XMMRegister rreg = right->as_xmm_double_reg();
       switch (code) {
         case lir_add: __ addsd(lreg, rreg);  break;
         case lir_sub: __ subsd(lreg, rreg);  break;
         case lir_mul_strictfp: // fall through
         case lir_mul: __ mulsd(lreg, rreg);  break;
         case lir_div_strictfp: // fall through
         case lir_div: __ divsd(lreg, rreg);  break;
         default: ShouldNotReachHere();
       }
     } else {
       Address raddr;
       if (right->is_double_stack()) {
         raddr = frame_map()->address_for_slot(right->double_stack_ix());
       } else if (right->is_constant()) {
         // hack for now
         raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
       } else {
         ShouldNotReachHere();
       }
       switch (code) {
         case lir_add: __ addsd(lreg, raddr);  break;
         case lir_sub: __ subsd(lreg, raddr);  break;
         case lir_mul_strictfp: // fall through
         case lir_mul: __ mulsd(lreg, raddr);  break;
         case lir_div_strictfp: // fall through
         case lir_div: __ divsd(lreg, raddr);  break;
         default: ShouldNotReachHere();
       }
     }
   } else if (left->is_single_fpu()) {
     assert(dest->is_single_fpu(),  "fpu stack allocation required");
     if (right->is_single_fpu()) {
       arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack);
     } else {
       assert(left->fpu_regnr() == 0, "left must be on TOS");
       assert(dest->fpu_regnr() == 0, "dest must be on TOS");
       Address raddr;
       if (right->is_single_stack()) {
         raddr = frame_map()->address_for_slot(right->single_stack_ix());
       } else if (right->is_constant()) {
         address const_addr = float_constant(right->as_jfloat());
         assert(const_addr != NULL, "incorrect float/double constant maintainance");
         // hack for now
         raddr = __ as_Address(InternalAddress(const_addr));
       } else {
         ShouldNotReachHere();
       }
       switch (code) {
         case lir_add: __ fadd_s(raddr); break;
         case lir_sub: __ fsub_s(raddr); break;
         case lir_mul_strictfp: // fall through
         case lir_mul: __ fmul_s(raddr); break;
         case lir_div_strictfp: // fall through
         case lir_div: __ fdiv_s(raddr); break;
         default:      ShouldNotReachHere();
       }
     }
   } else if (left->is_double_fpu()) {
     assert(dest->is_double_fpu(),  "fpu stack allocation required");
     if (code == lir_mul_strictfp || code == lir_div_strictfp) {
       // Double values require special handling for strictfp mul/div on x86
       __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
       __ fmulp(left->fpu_regnrLo() + 1);
     }
     if (right->is_double_fpu()) {
       arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack);
     } else {
       assert(left->fpu_regnrLo() == 0, "left must be on TOS");
       assert(dest->fpu_regnrLo() == 0, "dest must be on TOS");
       Address raddr;
       if (right->is_double_stack()) {
         raddr = frame_map()->address_for_slot(right->double_stack_ix());
       } else if (right->is_constant()) {
         // hack for now
         raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
       } else {
         ShouldNotReachHere();
       }
       switch (code) {
         case lir_add: __ fadd_d(raddr); break;
         case lir_sub: __ fsub_d(raddr); break;
         case lir_mul_strictfp: // fall through
         case lir_mul: __ fmul_d(raddr); break;
         case lir_div_strictfp: // fall through
         case lir_div: __ fdiv_d(raddr); break;
         default: ShouldNotReachHere();
       }
     }
     if (code == lir_mul_strictfp || code == lir_div_strictfp) {
       // Double values require special handling for strictfp mul/div on x86
       __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
       __ fmulp(dest->fpu_regnrLo() + 1);
     }
   } else if (left->is_single_stack() || left->is_address()) {
     assert(left == dest, "left and dest must be equal");
     Address laddr;
     if (left->is_single_stack()) {
       laddr = frame_map()->address_for_slot(left->single_stack_ix());
     } else if (left->is_address()) {
       laddr = as_Address(left->as_address_ptr());
     } else {
       ShouldNotReachHere();
     }
     if (right->is_single_cpu()) {
       Register rreg = right->as_register();
       switch (code) {
         case lir_add: __ addl(laddr, rreg); break;
         case lir_sub: __ subl(laddr, rreg); break;
         default:      ShouldNotReachHere();
       }
     } else if (right->is_constant()) {
       jint c = right->as_constant_ptr()->as_jint();
       switch (code) {
         case lir_add: {
           __ incrementl(laddr, c);
           break;
         }
         case lir_sub: {
           __ decrementl(laddr, c);
           break;
         }
         default: ShouldNotReachHere();
       }
     } else {
       ShouldNotReachHere();
     }
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) {
   assert(pop_fpu_stack  || (left_index     == dest_index || right_index     == dest_index), "invalid LIR");
   assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR");
   assert(left_index == 0 || right_index == 0, "either must be on top of stack");
   bool left_is_tos = (left_index == 0);
   bool dest_is_tos = (dest_index == 0);
   int non_tos_index = (left_is_tos ? right_index : left_index);
   switch (code) {
     case lir_add:
       if (pop_fpu_stack)       __ faddp(non_tos_index);
       else if (dest_is_tos)    __ fadd (non_tos_index);
       else                     __ fadda(non_tos_index);
       break;
     case lir_sub:
       if (left_is_tos) {
         if (pop_fpu_stack)     __ fsubrp(non_tos_index);
         else if (dest_is_tos)  __ fsub  (non_tos_index);
         else                   __ fsubra(non_tos_index);
       } else {
         if (pop_fpu_stack)     __ fsubp (non_tos_index);
         else if (dest_is_tos)  __ fsubr (non_tos_index);
         else                   __ fsuba (non_tos_index);
       }
       break;
     case lir_mul_strictfp: // fall through
     case lir_mul:
       if (pop_fpu_stack)       __ fmulp(non_tos_index);
       else if (dest_is_tos)    __ fmul (non_tos_index);
       else                     __ fmula(non_tos_index);
       break;
     case lir_div_strictfp: // fall through
     case lir_div:
       if (left_is_tos) {
         if (pop_fpu_stack)     __ fdivrp(non_tos_index);
         else if (dest_is_tos)  __ fdiv  (non_tos_index);
         else                   __ fdivra(non_tos_index);
       } else {
         if (pop_fpu_stack)     __ fdivp (non_tos_index);
         else if (dest_is_tos)  __ fdivr (non_tos_index);
         else                   __ fdiva (non_tos_index);
       }
       break;
     case lir_rem:
       assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation");
       __ fremr(noreg);
       break;
     default:
       ShouldNotReachHere();
   }
 }
 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr unused, LIR_Opr dest, LIR_Op* op) {
   if (value->is_double_xmm()) {
     switch(code) {
       case lir_abs :
         {
           if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) {
             __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg());
           }
           __ andpd(dest->as_xmm_double_reg(),
                     ExternalAddress((address)double_signmask_pool));
         }
         break;
       case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break;
       // all other intrinsics are not available in the SSE instruction set, so FPU is used
       default      : ShouldNotReachHere();
     }
   } else if (value->is_double_fpu()) {
     assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS");
     switch(code) {
       case lir_log   : __ flog() ; break;
       case lir_log10 : __ flog10() ; break;
       case lir_abs   : __ fabs() ; break;
       case lir_sqrt  : __ fsqrt(); break;
       case lir_sin   :
         // Should consider not saving rbx, if not necessary
         __ trigfunc('s', op->as_Op2()->fpu_stack_size());
         break;
       case lir_cos :
         // Should consider not saving rbx, if not necessary
         assert(op->as_Op2()->fpu_stack_size() <= 6, "sin and cos need two free stack slots");
         __ trigfunc('c', op->as_Op2()->fpu_stack_size());
         break;
       case lir_tan :
         // Should consider not saving rbx, if not necessary
         __ trigfunc('t', op->as_Op2()->fpu_stack_size());
         break;
       default      : ShouldNotReachHere();
     }
   } else {
     Unimplemented();
   }
 }
 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) {
   // assert(left->destroys_register(), "check");
   if (left->is_single_cpu()) {
     Register reg = left->as_register();
     if (right->is_constant()) {
       int val = right->as_constant_ptr()->as_jint();
       switch (code) {
         case lir_logic_and: __ andl (reg, val); break;
         case lir_logic_or:  __ orl  (reg, val); break;
         case lir_logic_xor: __ xorl (reg, val); break;
         default: ShouldNotReachHere();
       }
     } else if (right->is_stack()) {
       // added support for stack operands
       Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
       switch (code) {
         case lir_logic_and: __ andl (reg, raddr); break;
         case lir_logic_or:  __ orl  (reg, raddr); break;
         case lir_logic_xor: __ xorl (reg, raddr); break;
         default: ShouldNotReachHere();
       }
     } else {
       Register rright = right->as_register();
       switch (code) {
         case lir_logic_and: __ andptr (reg, rright); break;
         case lir_logic_or : __ orptr  (reg, rright); break;
         case lir_logic_xor: __ xorptr (reg, rright); break;
         default: ShouldNotReachHere();
       }
     }
     move_regs(reg, dst->as_register());
   } else {
     Register l_lo = left->as_register_lo();
     Register l_hi = left->as_register_hi();
     if (right->is_constant()) {
 #ifdef _LP64
       __ mov64(rscratch1, right->as_constant_ptr()->as_jlong());
       switch (code) {
         case lir_logic_and:
           __ andq(l_lo, rscratch1);
           break;
         case lir_logic_or:
           __ orq(l_lo, rscratch1);
           break;
         case lir_logic_xor:
           __ xorq(l_lo, rscratch1);
           break;
         default: ShouldNotReachHere();
       }
 #else
       int r_lo = right->as_constant_ptr()->as_jint_lo();
       int r_hi = right->as_constant_ptr()->as_jint_hi();
       switch (code) {
         case lir_logic_and:
           __ andl(l_lo, r_lo);
           __ andl(l_hi, r_hi);
           break;
         case lir_logic_or:
           __ orl(l_lo, r_lo);
           __ orl(l_hi, r_hi);
           break;
         case lir_logic_xor:
           __ xorl(l_lo, r_lo);
           __ xorl(l_hi, r_hi);
           break;
         default: ShouldNotReachHere();
       }
 #endif // _LP64
     } else {
 #ifdef _LP64
       Register r_lo;
       if (right->type() == T_OBJECT || right->type() == T_ARRAY) {
         r_lo = right->as_register();
       } else {
         r_lo = right->as_register_lo();
       }
 #else
       Register r_lo = right->as_register_lo();
       Register r_hi = right->as_register_hi();
       assert(l_lo != r_hi, "overwriting registers");
 #endif
       switch (code) {
         case lir_logic_and:
           __ andptr(l_lo, r_lo);
           NOT_LP64(__ andptr(l_hi, r_hi);)
           break;
         case lir_logic_or:
           __ orptr(l_lo, r_lo);
           NOT_LP64(__ orptr(l_hi, r_hi);)
           break;
         case lir_logic_xor:
           __ xorptr(l_lo, r_lo);
           NOT_LP64(__ xorptr(l_hi, r_hi);)
           break;
         default: ShouldNotReachHere();
       }
     }
     Register dst_lo = dst->as_register_lo();
     Register dst_hi = dst->as_register_hi();
 #ifdef _LP64
     move_regs(l_lo, dst_lo);
 #else
     if (dst_lo == l_hi) {
       assert(dst_hi != l_lo, "overwriting registers");
       move_regs(l_hi, dst_hi);
       move_regs(l_lo, dst_lo);
     } else {
       assert(dst_lo != l_hi, "overwriting registers");
       move_regs(l_lo, dst_lo);
       move_regs(l_hi, dst_hi);
     }
 #endif // _LP64
   }
 }
 // we assume that rax, and rdx can be overwritten
 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) {
   assert(left->is_single_cpu(),   "left must be register");
   assert(right->is_single_cpu() || right->is_constant(),  "right must be register or constant");
   assert(result->is_single_cpu(), "result must be register");
   //  assert(left->destroys_register(), "check");
   //  assert(right->destroys_register(), "check");
   Register lreg = left->as_register();
   Register dreg = result->as_register();
   if (right->is_constant()) {
     int divisor = right->as_constant_ptr()->as_jint();
     assert(divisor > 0 && is_power_of_2(divisor), "must be");
     if (code == lir_idiv) {
       assert(lreg == rax, "must be rax,");
       assert(temp->as_register() == rdx, "tmp register must be rdx");
       __ cdql(); // sign extend into rdx:rax
       if (divisor == 2) {
         __ subl(lreg, rdx);
       } else {
         __ andl(rdx, divisor - 1);
         __ addl(lreg, rdx);
       }
       __ sarl(lreg, log2_intptr(divisor));
       move_regs(lreg, dreg);
     } else if (code == lir_irem) {
       Label done;
       __ mov(dreg, lreg);
       __ andl(dreg, 0x80000000 | (divisor - 1));
       __ jcc(Assembler::positive, done);
       __ decrement(dreg);
       __ orl(dreg, ~(divisor - 1));
       __ increment(dreg);
       __ bind(done);
     } else {
       ShouldNotReachHere();
     }
   } else {
     Register rreg = right->as_register();
     assert(lreg == rax, "left register must be rax,");
     assert(rreg != rdx, "right register must not be rdx");
     assert(temp->as_register() == rdx, "tmp register must be rdx");
     move_regs(lreg, rax);
     int idivl_offset = __ corrected_idivl(rreg);
     add_debug_info_for_div0(idivl_offset, info);
     if (code == lir_irem) {
       move_regs(rdx, dreg); // result is in rdx
     } else {
       move_regs(rax, dreg);
     }
   }
 }
 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) {
   if (opr1->is_single_cpu()) {
     Register reg1 = opr1->as_register();
     if (opr2->is_single_cpu()) {
       // cpu register - cpu register
       if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
         __ cmpptr(reg1, opr2->as_register());
       } else {
         assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?");
         __ cmpl(reg1, opr2->as_register());
       }
     } else if (opr2->is_stack()) {
       // cpu register - stack
       if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
         __ cmpptr(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
       } else {
         __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
       }
     } else if (opr2->is_constant()) {
       // cpu register - constant
       LIR_Const* c = opr2->as_constant_ptr();
       if (c->type() == T_INT) {
         __ cmpl(reg1, c->as_jint());
       } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
         // In 64bit oops are single register
         jobject o = c->as_jobject();
         if (o == NULL) {
           __ cmpptr(reg1, (int32_t)NULL_WORD);
         } else {
 #ifdef _LP64
           __ movoop(rscratch1, o);
           __ cmpptr(reg1, rscratch1);
 #else
           __ cmpoop(reg1, c->as_jobject());
 #endif // _LP64
         }
       } else {
         ShouldNotReachHere();
       }
       // cpu register - address
     } else if (opr2->is_address()) {
       if (op->info() != NULL) {
         add_debug_info_for_null_check_here(op->info());
       }
       __ cmpl(reg1, as_Address(opr2->as_address_ptr()));
     } else {
       ShouldNotReachHere();
     }
   } else if(opr1->is_double_cpu()) {
     Register xlo = opr1->as_register_lo();
     Register xhi = opr1->as_register_hi();
     if (opr2->is_double_cpu()) {
 #ifdef _LP64
       __ cmpptr(xlo, opr2->as_register_lo());
 #else
       // cpu register - cpu register
       Register ylo = opr2->as_register_lo();
       Register yhi = opr2->as_register_hi();
       __ subl(xlo, ylo);
       __ sbbl(xhi, yhi);
       if (condition == lir_cond_equal || condition == lir_cond_notEqual) {
         __ orl(xhi, xlo);
       }
 #endif // _LP64
     } else if (opr2->is_constant()) {
       // cpu register - constant 0
       assert(opr2->as_jlong() == (jlong)0, "only handles zero");
 #ifdef _LP64
       __ cmpptr(xlo, (int32_t)opr2->as_jlong());
 #else
       assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case");
       __ orl(xhi, xlo);
 #endif // _LP64
     } else {
       ShouldNotReachHere();
     }
   } else if (opr1->is_single_xmm()) {
     XMMRegister reg1 = opr1->as_xmm_float_reg();
     if (opr2->is_single_xmm()) {
       // xmm register - xmm register
       __ ucomiss(reg1, opr2->as_xmm_float_reg());
     } else if (opr2->is_stack()) {
       // xmm register - stack
       __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
     } else if (opr2->is_constant()) {
       // xmm register - constant
       __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat())));
     } else if (opr2->is_address()) {
       // xmm register - address
       if (op->info() != NULL) {
         add_debug_info_for_null_check_here(op->info());
       }
       __ ucomiss(reg1, as_Address(opr2->as_address_ptr()));
     } else {
       ShouldNotReachHere();
     }
   } else if (opr1->is_double_xmm()) {
     XMMRegister reg1 = opr1->as_xmm_double_reg();
     if (opr2->is_double_xmm()) {
       // xmm register - xmm register
       __ ucomisd(reg1, opr2->as_xmm_double_reg());
     } else if (opr2->is_stack()) {
       // xmm register - stack
       __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix()));
     } else if (opr2->is_constant()) {
       // xmm register - constant
       __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble())));
     } else if (opr2->is_address()) {
       // xmm register - address
       if (op->info() != NULL) {
         add_debug_info_for_null_check_here(op->info());
       }
       __ ucomisd(reg1, as_Address(opr2->pointer()->as_address()));
     } else {
       ShouldNotReachHere();
     }
   } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) {
     assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)");
     assert(opr2->is_fpu_register(), "both must be registers");
     __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
   } else if (opr1->is_address() && opr2->is_constant()) {
     LIR_Const* c = opr2->as_constant_ptr();
 #ifdef _LP64
     if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
       assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse");
       __ movoop(rscratch1, c->as_jobject());
     }
 #endif // LP64
     if (op->info() != NULL) {
       add_debug_info_for_null_check_here(op->info());
     }
     // special case: address - constant
     LIR_Address* addr = opr1->as_address_ptr();
     if (c->type() == T_INT) {
       __ cmpl(as_Address(addr), c->as_jint());
     } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
 #ifdef _LP64
       // %%% Make this explode if addr isn't reachable until we figure out a
       // better strategy by giving noreg as the temp for as_Address
       __ cmpptr(rscratch1, as_Address(addr, noreg));
 #else
       __ cmpoop(as_Address(addr), c->as_jobject());
 #endif // _LP64
     } else {
       ShouldNotReachHere();
     }
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) {
   if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) {
     if (left->is_single_xmm()) {
       assert(right->is_single_xmm(), "must match");
       __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i);
     } else if (left->is_double_xmm()) {
       assert(right->is_double_xmm(), "must match");
       __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i);
     } else {
       assert(left->is_single_fpu() || left->is_double_fpu(), "must be");
       assert(right->is_single_fpu() || right->is_double_fpu(), "must match");
       assert(left->fpu() == 0, "left must be on TOS");
       __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(),
                   op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
     }
   } else {
     assert(code == lir_cmp_l2i, "check");
 #ifdef _LP64
     Label done;
     Register dest = dst->as_register();
     __ cmpptr(left->as_register_lo(), right->as_register_lo());
     __ movl(dest, -1);
     __ jccb(Assembler::less, done);
     __ set_byte_if_not_zero(dest);
     __ movzbl(dest, dest);
     __ bind(done);
 #else
     __ lcmp2int(left->as_register_hi(),
                 left->as_register_lo(),
                 right->as_register_hi(),
                 right->as_register_lo());
     move_regs(left->as_register_hi(), dst->as_register());
 #endif // _LP64
   }
 }
 void LIR_Assembler::align_call(LIR_Code code) {
   if (os::is_MP()) {
     // make sure that the displacement word of the call ends up word aligned
     int offset = __ offset();
     switch (code) {
       case lir_static_call:
       case lir_optvirtual_call:
       case lir_dynamic_call:
         offset += NativeCall::displacement_offset;
         break;
       case lir_icvirtual_call:
         offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size;
       break;
       case lir_virtual_call:  // currently, sparc-specific for niagara
       default: ShouldNotReachHere();
     }
     while (offset++ % BytesPerWord != 0) {
       __ nop();
     }
   }
 }
 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
   assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
          "must be aligned");
   __ call(AddressLiteral(op->addr(), rtype));
   add_call_info(code_offset(), op->info());
 }
 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
   RelocationHolder rh = virtual_call_Relocation::spec(pc());
   __ movoop(IC_Klass, (jobject)Universe::non_oop_word());
   assert(!os::is_MP() ||
          (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
          "must be aligned");
   __ call(AddressLiteral(op->addr(), rh));
   add_call_info(code_offset(), op->info());
 }
 /* Currently, vtable-dispatch is only enabled for sparc platforms */
 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) {
   ShouldNotReachHere();
 }
 void LIR_Assembler::emit_static_call_stub() {
   address call_pc = __ pc();
   address stub = __ start_a_stub(call_stub_size);
   if (stub == NULL) {
     bailout("static call stub overflow");
     return;
   }
   int start = __ offset();
   if (os::is_MP()) {
     // make sure that the displacement word of the call ends up word aligned
     int offset = __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset;
     while (offset++ % BytesPerWord != 0) {
       __ nop();
     }
   }
   __ relocate(static_stub_Relocation::spec(call_pc));
   __ movoop(rbx, (jobject)NULL);
   // must be set to -1 at code generation time
   assert(!os::is_MP() || ((__ offset() + 1) % BytesPerWord) == 0, "must be aligned on MP");
   // On 64bit this will die since it will take a movq & jmp, must be only a jmp
   __ jump(RuntimeAddress(__ pc()));
   assert(__ offset() - start <= call_stub_size, "stub too big");
   __ end_a_stub();
 }
 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
   assert(exceptionOop->as_register() == rax, "must match");
   assert(exceptionPC->as_register() == rdx, "must match");
   // exception object is not added to oop map by LinearScan
   // (LinearScan assumes that no oops are in fixed registers)
   info->add_register_oop(exceptionOop);
   Runtime1::StubID unwind_id;
   // get current pc information
   // pc is only needed if the method has an exception handler, the unwind code does not need it.
   int pc_for_athrow_offset = __ offset();
   InternalAddress pc_for_athrow(__ pc());
   __ lea(exceptionPC->as_register(), pc_for_athrow);
   add_call_info(pc_for_athrow_offset, info); // for exception handler
   __ verify_not_null_oop(rax);
   // search an exception handler (rax: exception oop, rdx: throwing pc)
   if (compilation()->has_fpu_code()) {
     unwind_id = Runtime1::handle_exception_id;
   } else {
     unwind_id = Runtime1::handle_exception_nofpu_id;
   }
   __ call(RuntimeAddress(Runtime1::entry_for(unwind_id)));
   // enough room for two byte trap
   __ nop();
 }
 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) {
   assert(exceptionOop->as_register() == rax, "must match");
   __ jmp(_unwind_handler_entry);
 }
 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) {
   // optimized version for linear scan:
   // * count must be already in ECX (guaranteed by LinearScan)
   // * left and dest must be equal
   // * tmp must be unused
   assert(count->as_register() == SHIFT_count, "count must be in ECX");
   assert(left == dest, "left and dest must be equal");
   assert(tmp->is_illegal(), "wasting a register if tmp is allocated");
   if (left->is_single_cpu()) {
     Register value = left->as_register();
     assert(value != SHIFT_count, "left cannot be ECX");
     switch (code) {
       case lir_shl:  __ shll(value); break;
       case lir_shr:  __ sarl(value); break;
       case lir_ushr: __ shrl(value); break;
       default: ShouldNotReachHere();
     }
   } else if (left->is_double_cpu()) {
     Register lo = left->as_register_lo();
     Register hi = left->as_register_hi();
     assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX");
 #ifdef _LP64
     switch (code) {
       case lir_shl:  __ shlptr(lo);        break;
       case lir_shr:  __ sarptr(lo);        break;
       case lir_ushr: __ shrptr(lo);        break;
       default: ShouldNotReachHere();
     }
 #else
     switch (code) {
       case lir_shl:  __ lshl(hi, lo);        break;
       case lir_shr:  __ lshr(hi, lo, true);  break;
       case lir_ushr: __ lshr(hi, lo, false); break;
       default: ShouldNotReachHere();
     }
 #endif // LP64
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) {
   if (dest->is_single_cpu()) {
     // first move left into dest so that left is not destroyed by the shift
     Register value = dest->as_register();
     count = count & 0x1F; // Java spec
     move_regs(left->as_register(), value);
     switch (code) {
       case lir_shl:  __ shll(value, count); break;
       case lir_shr:  __ sarl(value, count); break;
       case lir_ushr: __ shrl(value, count); break;
       default: ShouldNotReachHere();
     }
   } else if (dest->is_double_cpu()) {
 #ifndef _LP64
     Unimplemented();
 #else
     // first move left into dest so that left is not destroyed by the shift
     Register value = dest->as_register_lo();
     count = count & 0x1F; // Java spec
     move_regs(left->as_register_lo(), value);
     switch (code) {
       case lir_shl:  __ shlptr(value, count); break;
       case lir_shr:  __ sarptr(value, count); break;
       case lir_ushr: __ shrptr(value, count); break;
       default: ShouldNotReachHere();
     }
 #endif // _LP64
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) {
   assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
   int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
   assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
   __ movptr (Address(rsp, offset_from_rsp_in_bytes), r);
 }
 void LIR_Assembler::store_parameter(jint c,     int offset_from_rsp_in_words) {
   assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
   int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
   assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
   __ movptr (Address(rsp, offset_from_rsp_in_bytes), c);
 }
 void LIR_Assembler::store_parameter(jobject o,  int offset_from_rsp_in_words) {
   assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
   int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
   assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
   __ movoop (Address(rsp, offset_from_rsp_in_bytes), o);
 }
 // This code replaces a call to arraycopy; no exception may
 // be thrown in this code, they must be thrown in the System.arraycopy
 // activation frame; we could save some checks if this would not be the case
 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
   ciArrayKlass* default_type = op->expected_type();
   Register src = op->src()->as_register();
   Register dst = op->dst()->as_register();
   Register src_pos = op->src_pos()->as_register();
   Register dst_pos = op->dst_pos()->as_register();
   Register length  = op->length()->as_register();
   Register tmp = op->tmp()->as_register();
   CodeStub* stub = op->stub();
   int flags = op->flags();
   BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL;
   if (basic_type == T_ARRAY) basic_type = T_OBJECT;
   // if we don't know anything, just go through the generic arraycopy
   if (default_type == NULL) {
     Label done;
     // save outgoing arguments on stack in case call to System.arraycopy is needed
     // HACK ALERT. This code used to push the parameters in a hardwired fashion
     // for interpreter calling conventions. Now we have to do it in new style conventions.
     // For the moment until C1 gets the new register allocator I just force all the
     // args to the right place (except the register args) and then on the back side
     // reload the register args properly if we go slow path. Yuck
     // These are proper for the calling convention
     store_parameter(length, 2);
     store_parameter(dst_pos, 1);
     store_parameter(dst, 0);
     // these are just temporary placements until we need to reload
     store_parameter(src_pos, 3);
     store_parameter(src, 4);
     NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");)
     address C_entry = CAST_FROM_FN_PTR(address, Runtime1::arraycopy);
     address copyfunc_addr = StubRoutines::generic_arraycopy();
     // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint
 #ifdef _LP64
     // The arguments are in java calling convention so we can trivially shift them to C
     // convention
     assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4);
     __ mov(c_rarg0, j_rarg0);
     assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4);
     __ mov(c_rarg1, j_rarg1);
     assert_different_registers(c_rarg2, j_rarg3, j_rarg4);
     __ mov(c_rarg2, j_rarg2);
     assert_different_registers(c_rarg3, j_rarg4);
     __ mov(c_rarg3, j_rarg3);
 #ifdef _WIN64
     // Allocate abi space for args but be sure to keep stack aligned
     __ subptr(rsp, 6*wordSize);
     store_parameter(j_rarg4, 4);
     if (copyfunc_addr == NULL) { // Use C version if stub was not generated
       __ call(RuntimeAddress(C_entry));
     } else {
 #ifndef PRODUCT
       if (PrintC1Statistics) {
         __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
       }
 #endif
       __ call(RuntimeAddress(copyfunc_addr));
     }
     __ addptr(rsp, 6*wordSize);
 #else
     __ mov(c_rarg4, j_rarg4);
     if (copyfunc_addr == NULL) { // Use C version if stub was not generated
       __ call(RuntimeAddress(C_entry));
     } else {
 #ifndef PRODUCT
       if (PrintC1Statistics) {
         __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
       }
 #endif
       __ call(RuntimeAddress(copyfunc_addr));
     }
 #endif // _WIN64
 #else
     __ push(length);
     __ push(dst_pos);
     __ push(dst);
     __ push(src_pos);
     __ push(src);
     if (copyfunc_addr == NULL) { // Use C version if stub was not generated
       __ call_VM_leaf(C_entry, 5); // removes pushed parameter from the stack
     } else {
 #ifndef PRODUCT
       if (PrintC1Statistics) {
         __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
       }
 #endif
       __ call_VM_leaf(copyfunc_addr, 5); // removes pushed parameter from the stack
     }
 #endif // _LP64
     __ cmpl(rax, 0);
     __ jcc(Assembler::equal, *stub->continuation());
     if (copyfunc_addr != NULL) {
       __ mov(tmp, rax);
       __ xorl(tmp, -1);
     }
     // Reload values from the stack so they are where the stub
     // expects them.
     __ movptr   (dst,     Address(rsp, 0*BytesPerWord));
     __ movptr   (dst_pos, Address(rsp, 1*BytesPerWord));
     __ movptr   (length,  Address(rsp, 2*BytesPerWord));
     __ movptr   (src_pos, Address(rsp, 3*BytesPerWord));
     __ movptr   (src,     Address(rsp, 4*BytesPerWord));
     if (copyfunc_addr != NULL) {
       __ subl(length, tmp);
       __ addl(src_pos, tmp);
       __ addl(dst_pos, tmp);
     }
     __ jmp(*stub->entry());
     __ bind(*stub->continuation());
     return;
   }
   assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point");
   int elem_size = type2aelembytes(basic_type);
   int shift_amount;
   Address::ScaleFactor scale;
   switch (elem_size) {
     case 1 :
       shift_amount = 0;
       scale = Address::times_1;
       break;
     case 2 :
       shift_amount = 1;
       scale = Address::times_2;
       break;
     case 4 :
       shift_amount = 2;
       scale = Address::times_4;
       break;
     case 8 :
       shift_amount = 3;
       scale = Address::times_8;
       break;
     default:
       ShouldNotReachHere();
   }
   Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes());
   Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes());
   Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes());
   Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes());
   // length and pos's are all sign extended at this point on 64bit
   // test for NULL
   if (flags & LIR_OpArrayCopy::src_null_check) {
     __ testptr(src, src);
     __ jcc(Assembler::zero, *stub->entry());
   }
   if (flags & LIR_OpArrayCopy::dst_null_check) {
     __ testptr(dst, dst);
     __ jcc(Assembler::zero, *stub->entry());
   }
   // check if negative
   if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
     __ testl(src_pos, src_pos);
     __ jcc(Assembler::less, *stub->entry());
   }
   if (flags & LIR_OpArrayCopy::dst_pos_positive_check) {
     __ testl(dst_pos, dst_pos);
     __ jcc(Assembler::less, *stub->entry());
   }
   if (flags & LIR_OpArrayCopy::src_range_check) {
     __ lea(tmp, Address(src_pos, length, Address::times_1, 0));
     __ cmpl(tmp, src_length_addr);
     __ jcc(Assembler::above, *stub->entry());
   }
   if (flags & LIR_OpArrayCopy::dst_range_check) {
     __ lea(tmp, Address(dst_pos, length, Address::times_1, 0));
     __ cmpl(tmp, dst_length_addr);
     __ jcc(Assembler::above, *stub->entry());
   }
   if (flags & LIR_OpArrayCopy::length_positive_check) {
     __ testl(length, length);
     __ jcc(Assembler::less, *stub->entry());
     __ jcc(Assembler::zero, *stub->continuation());
   }
 #ifdef _LP64
   __ movl2ptr(src_pos, src_pos); //higher 32bits must be null
   __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null
 #endif
   if (flags & LIR_OpArrayCopy::type_check) {
     // We don't know the array types are compatible
     if (basic_type != T_OBJECT) {
       // Simple test for basic type arrays
       if (UseCompressedOops) {
         __ movl(tmp, src_klass_addr);
         __ cmpl(tmp, dst_klass_addr);
       } else {
         __ movptr(tmp, src_klass_addr);
         __ cmpptr(tmp, dst_klass_addr);
       }
       __ jcc(Assembler::notEqual, *stub->entry());
     } else {
       // For object arrays, if src is a sub class of dst then we can
       // safely do the copy.
       Label cont, slow;
       __ push(src);
       __ push(dst);
       __ load_klass(src, src);
       __ load_klass(dst, dst);
       __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, NULL);
       __ push(src);
       __ push(dst);
       __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
       __ pop(dst);
       __ pop(src);
       __ cmpl(src, 0);
       __ jcc(Assembler::notEqual, cont);
       __ bind(slow);
       __ pop(dst);
       __ pop(src);
       address copyfunc_addr = StubRoutines::checkcast_arraycopy();
       if (copyfunc_addr != NULL) { // use stub if available
         // src is not a sub class of dst so we have to do a
         // per-element check.
         int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray;
         if ((flags & mask) != mask) {
           // Check that at least both of them object arrays.
           assert(flags & mask, "one of the two should be known to be an object array");
           if (!(flags & LIR_OpArrayCopy::src_objarray)) {
             __ load_klass(tmp, src);
           } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
             __ load_klass(tmp, dst);
           }
           int lh_offset = klassOopDesc::header_size() * HeapWordSize +
             Klass::layout_helper_offset_in_bytes();
           Address klass_lh_addr(tmp, lh_offset);
           jint objArray_lh = Klass::array_layout_helper(T_OBJECT);
           __ cmpl(klass_lh_addr, objArray_lh);
           __ jcc(Assembler::notEqual, *stub->entry());
         }
 #ifndef _LP64
         // save caller save registers
         store_parameter(rax, 2);
         store_parameter(rcx, 1);
         store_parameter(rdx, 0);
         __ movptr(tmp, dst_klass_addr);
         __ movptr(tmp, Address(tmp, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc)));
         __ push(tmp);
         __ movl(tmp, Address(tmp, Klass::super_check_offset_offset_in_bytes() + sizeof(oopDesc)));
         __ push(tmp);
         __ push(length);
         __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
         __ push(tmp);
         __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
         __ push(tmp);
         __ call_VM_leaf(copyfunc_addr, 5);
 #else
         __ movl2ptr(length, length); //higher 32bits must be null
         // save caller save registers: copy them to callee save registers
         __ mov(rbx, rdx);
         __ mov(r13, r8);
         __ mov(r14, r9);
 #ifndef _WIN64
         store_parameter(rsi, 1);
         store_parameter(rcx, 0);
         // on WIN64 other incoming parameters are in rdi and rsi saved
         // across the call
 #endif
         __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
         assert_different_registers(c_rarg0, dst, dst_pos, length);
         __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
         assert_different_registers(c_rarg1, dst, length);
         __ mov(c_rarg2, length);
         assert_different_registers(c_rarg2, dst);
 #ifdef _WIN64
         // Allocate abi space for args but be sure to keep stack aligned
         __ subptr(rsp, 6*wordSize);
         __ load_klass(c_rarg3, dst);
         __ movptr(c_rarg3, Address(c_rarg3, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc)));
         store_parameter(c_rarg3, 4);
         __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset_in_bytes() + sizeof(oopDesc)));
         __ call(RuntimeAddress(copyfunc_addr));
         __ addptr(rsp, 6*wordSize);
 #else
         __ load_klass(c_rarg4, dst);
         __ movptr(c_rarg4, Address(c_rarg4, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc)));
         __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset_in_bytes() + sizeof(oopDesc)));
         __ call(RuntimeAddress(copyfunc_addr));
 #endif
 #endif
 #ifndef PRODUCT
         if (PrintC1Statistics) {
           Label failed;
           __ testl(rax, rax);
           __ jcc(Assembler::notZero, failed);
           __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt));
           __ bind(failed);
         }
 #endif
         __ testl(rax, rax);
         __ jcc(Assembler::zero, *stub->continuation());
 #ifndef PRODUCT
         if (PrintC1Statistics) {
           __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt));
         }
 #endif
         __ mov(tmp, rax);
         __ xorl(tmp, -1);
 #ifndef _LP64
         // restore caller save registers
         assert_different_registers(tmp, rdx, rcx, rax); // result of stub will be lost
         __ movptr(rdx, Address(rsp, 0*BytesPerWord));
         __ movptr(rcx, Address(rsp, 1*BytesPerWord));
         __ movptr(rax, Address(rsp, 2*BytesPerWord));
 #else
         // restore caller save registers
         __ mov(rdx, rbx);
         __ mov(r8, r13);
         __ mov(r9, r14);
 #ifndef _WIN64
         assert_different_registers(tmp, rdx, r8, r9, rcx, rsi); // result of stub will be lost
         __ movptr(rcx, Address(rsp, 0*BytesPerWord));
         __ movptr(rsi, Address(rsp, 1*BytesPerWord));
 #else
         assert_different_registers(tmp, rdx, r8, r9); // result of stub will be lost
 #endif
 #endif
         __ subl(length, tmp);
         __ addl(src_pos, tmp);
         __ addl(dst_pos, tmp);
       }
       __ jmp(*stub->entry());
       __ bind(cont);
       __ pop(dst);
       __ pop(src);
     }
   }
 #ifdef ASSERT
   if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) {
     // Sanity check the known type with the incoming class.  For the
     // primitive case the types must match exactly with src.klass and
     // dst.klass each exactly matching the default type.  For the
     // object array case, if no type check is needed then either the
     // dst type is exactly the expected type and the src type is a
     // subtype which we can't check or src is the same array as dst
     // but not necessarily exactly of type default_type.
     Label known_ok, halt;
     __ movoop(tmp, default_type->constant_encoding());
 #ifdef _LP64
     if (UseCompressedOops) {
       __ encode_heap_oop(tmp);
     }
 #endif
     if (basic_type != T_OBJECT) {
       if (UseCompressedOops) __ cmpl(tmp, dst_klass_addr);
       else                   __ cmpptr(tmp, dst_klass_addr);
       __ jcc(Assembler::notEqual, halt);
       if (UseCompressedOops) __ cmpl(tmp, src_klass_addr);
       else                   __ cmpptr(tmp, src_klass_addr);
       __ jcc(Assembler::equal, known_ok);
     } else {
       if (UseCompressedOops) __ cmpl(tmp, dst_klass_addr);
       else                   __ cmpptr(tmp, dst_klass_addr);
       __ jcc(Assembler::equal, known_ok);
       __ cmpptr(src, dst);
       __ jcc(Assembler::equal, known_ok);
     }
     __ bind(halt);
     __ stop("incorrect type information in arraycopy");
     __ bind(known_ok);
   }
 #endif
 #ifndef PRODUCT
   if (PrintC1Statistics) {
     __ incrementl(ExternalAddress(Runtime1::arraycopy_count_address(basic_type)));
   }
 #endif
 #ifdef _LP64
   assert_different_registers(c_rarg0, dst, dst_pos, length);
   __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
   assert_different_registers(c_rarg1, length);
   __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
   __ mov(c_rarg2, length);
 #else
   __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
   store_parameter(tmp, 0);
   __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
   store_parameter(tmp, 1);
   store_parameter(length, 2);
 #endif // _LP64
   bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0;
   bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0;
   const char *name;
   address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false);
   __ call_VM_leaf(entry, 0);
   __ bind(*stub->continuation());
 }
 void LIR_Assembler::emit_lock(LIR_OpLock* op) {
   Register obj = op->obj_opr()->as_register();  // may not be an oop
   Register hdr = op->hdr_opr()->as_register();
   Register lock = op->lock_opr()->as_register();
   if (!UseFastLocking) {
     __ jmp(*op->stub()->entry());
   } else if (op->code() == lir_lock) {
     Register scratch = noreg;
     if (UseBiasedLocking) {
       scratch = op->scratch_opr()->as_register();
     }
     assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
     // add debug info for NullPointerException only if one is possible
     int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry());
     if (op->info() != NULL) {
       add_debug_info_for_null_check(null_check_offset, op->info());
     }
     // done
   } else if (op->code() == lir_unlock) {
     assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
     __ unlock_object(hdr, obj, lock, *op->stub()->entry());
   } else {
     Unimplemented();
   }
   __ bind(*op->stub()->continuation());
 }
 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
   ciMethod* method = op->profiled_method();
   int bci          = op->profiled_bci();
   // Update counter for all call types
   ciMethodData* md = method->method_data_or_null();
   assert(md != NULL, "Sanity");
   ciProfileData* data = md->bci_to_data(bci);
   assert(data->is_CounterData(), "need CounterData for calls");
   assert(op->mdo()->is_single_cpu(),  "mdo must be allocated");
   Register mdo  = op->mdo()->as_register();
   __ movoop(mdo, md->constant_encoding());
   Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
   Bytecodes::Code bc = method->java_code_at_bci(bci);
   // Perform additional virtual call profiling for invokevirtual and
   // invokeinterface bytecodes
   if ((bc == Bytecodes::_invokevirtual || bc == Bytecodes::_invokeinterface) &&
       C1ProfileVirtualCalls) {
     assert(op->recv()->is_single_cpu(), "recv must be allocated");
     Register recv = op->recv()->as_register();
     assert_different_registers(mdo, recv);
     assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls");
     ciKlass* known_klass = op->known_holder();
     if (C1OptimizeVirtualCallProfiling && known_klass != NULL) {
       // We know the type that will be seen at this call site; we can
       // statically update the methodDataOop rather than needing to do
       // dynamic tests on the receiver type
       // NOTE: we should probably put a lock around this search to
       // avoid collisions by concurrent compilations
       ciVirtualCallData* vc_data = (ciVirtualCallData*) data;
       uint i;
       for (i = 0; i < VirtualCallData::row_limit(); i++) {
         ciKlass* receiver = vc_data->receiver(i);
         if (known_klass->equals(receiver)) {
           Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
           __ addptr(data_addr, DataLayout::counter_increment);
           return;
         }
       }
       // Receiver type not found in profile data; select an empty slot
       // Note that this is less efficient than it should be because it
       // always does a write to the receiver part of the
       // VirtualCallData rather than just the first time
       for (i = 0; i < VirtualCallData::row_limit(); i++) {
         ciKlass* receiver = vc_data->receiver(i);
         if (receiver == NULL) {
           Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i)));
           __ movoop(recv_addr, known_klass->constant_encoding());
           Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
           __ addptr(data_addr, DataLayout::counter_increment);
           return;
         }
       }
     } else {
       __ load_klass(recv, recv);
       Label update_done;
       type_profile_helper(mdo, md, data, recv, &update_done);
       // Receiver did not match any saved receiver and there is no empty row for it.
       // Increment total counter to indicate polymorphic case.
       __ addptr(counter_addr, DataLayout::counter_increment);
       __ bind(update_done);
     }
   } else {
     // Static call
     __ addptr(counter_addr, DataLayout::counter_increment);
   }
 }
 void LIR_Assembler::emit_delay(LIR_OpDelay*) {
   Unimplemented();
 }
 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) {
   __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no));
 }
 void LIR_Assembler::align_backward_branch_target() {
   __ align(BytesPerWord);
 }
 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) {
   if (left->is_single_cpu()) {
     __ negl(left->as_register());
     move_regs(left->as_register(), dest->as_register());
   } else if (left->is_double_cpu()) {
     Register lo = left->as_register_lo();
 #ifdef _LP64
     Register dst = dest->as_register_lo();
     __ movptr(dst, lo);
     __ negptr(dst);
 #else
     Register hi = left->as_register_hi();
     __ lneg(hi, lo);
     if (dest->as_register_lo() == hi) {
       assert(dest->as_register_hi() != lo, "destroying register");
       move_regs(hi, dest->as_register_hi());
       move_regs(lo, dest->as_register_lo());
     } else {
       move_regs(lo, dest->as_register_lo());
       move_regs(hi, dest->as_register_hi());
     }
 #endif // _LP64
   } else if (dest->is_single_xmm()) {
     if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) {
       __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg());
     }
     __ xorps(dest->as_xmm_float_reg(),
              ExternalAddress((address)float_signflip_pool));
   } else if (dest->is_double_xmm()) {
     if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) {
       __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg());
     }
     __ xorpd(dest->as_xmm_double_reg(),
              ExternalAddress((address)double_signflip_pool));
   } else if (left->is_single_fpu() || left->is_double_fpu()) {
     assert(left->fpu() == 0, "arg must be on TOS");
     assert(dest->fpu() == 0, "dest must be TOS");
     __ fchs();
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::leal(LIR_Opr addr, LIR_Opr dest) {
   assert(addr->is_address() && dest->is_register(), "check");
   Register reg;
   reg = dest->as_pointer_register();
   __ lea(reg, as_Address(addr->as_address_ptr()));
 }
 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) {
   assert(!tmp->is_valid(), "don't need temporary");
   __ call(RuntimeAddress(dest));
   if (info != NULL) {
     add_call_info_here(info);
   }
 }
 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) {
   assert(type == T_LONG, "only for volatile long fields");
   if (info != NULL) {
     add_debug_info_for_null_check_here(info);
   }
   if (src->is_double_xmm()) {
     if (dest->is_double_cpu()) {
 #ifdef _LP64
       __ movdq(dest->as_register_lo(), src->as_xmm_double_reg());
 #else
       __ movdl(dest->as_register_lo(), src->as_xmm_double_reg());
       __ psrlq(src->as_xmm_double_reg(), 32);
       __ movdl(dest->as_register_hi(), src->as_xmm_double_reg());
 #endif // _LP64
     } else if (dest->is_double_stack()) {
       __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg());
     } else if (dest->is_address()) {
       __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg());
     } else {
       ShouldNotReachHere();
     }
   } else if (dest->is_double_xmm()) {
     if (src->is_double_stack()) {
       __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix()));
     } else if (src->is_address()) {
       __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr()));
     } else {
       ShouldNotReachHere();
     }
   } else if (src->is_double_fpu()) {
     assert(src->fpu_regnrLo() == 0, "must be TOS");
     if (dest->is_double_stack()) {
       __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix()));
     } else if (dest->is_address()) {
       __ fistp_d(as_Address(dest->as_address_ptr()));
     } else {
       ShouldNotReachHere();
     }
   } else if (dest->is_double_fpu()) {
     assert(dest->fpu_regnrLo() == 0, "must be TOS");
     if (src->is_double_stack()) {
       __ fild_d(frame_map()->address_for_slot(src->double_stack_ix()));
     } else if (src->is_address()) {
       __ fild_d(as_Address(src->as_address_ptr()));
     } else {
       ShouldNotReachHere();
     }
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::membar() {
   // QQQ sparc TSO uses this,
   __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad));
 }
 void LIR_Assembler::membar_acquire() {
   // No x86 machines currently require load fences
   // __ load_fence();
 }
 void LIR_Assembler::membar_release() {
   // No x86 machines currently require store fences
   // __ store_fence();
 }
 void LIR_Assembler::get_thread(LIR_Opr result_reg) {
   assert(result_reg->is_register(), "check");
 #ifdef _LP64
   // __ get_thread(result_reg->as_register_lo());
   __ mov(result_reg->as_register(), r15_thread);
 #else
   __ get_thread(result_reg->as_register());
 #endif // _LP64
 }
 void LIR_Assembler::peephole(LIR_List*) {
   // do nothing for now
 }
 #undef __

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/c1_LIRAssembler_x86.cpp@5d046bf49ce7 (annotated)

src/cpu/x86/vm/c1_LIRAssembler_x86.cpp