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

src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp@7eca5de9e0b6 (annotated)

src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp

Thu, 20 Sep 2012 16:49:17 +0200

author: roland
date: Thu, 20 Sep 2012 16:49:17 +0200
changeset 4106: 7eca5de9e0b6
parent 4051: 8a02ca5e5576
child 4142: d8ce2825b193
child 4159: 8e47bac5643a
permissions: -rw-r--r--

7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
Summary: use shorter instruction sequences for atomic add and atomic exchange when possible.
Reviewed-by: kvn, jrose

 /*
  * Copyright (c) 2000, 2012, 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 "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_sparc.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "runtime/sharedRuntime.hpp"
 #define __ _masm->
 //------------------------------------------------------------
 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: {
         jint value = constant->as_jint();
         return Assembler::is_simm13(value);
       }
       default:
         return false;
     }
   }
   return false;
 }
 bool LIR_Assembler::is_single_instruction(LIR_Op* op) {
   switch (op->code()) {
     case lir_null_check:
     return true;
     case lir_add:
     case lir_ushr:
     case lir_shr:
     case lir_shl:
       // integer shifts and adds are always one instruction
       return op->result_opr()->is_single_cpu();
     case lir_move: {
       LIR_Op1* op1 = op->as_Op1();
       LIR_Opr src = op1->in_opr();
       LIR_Opr dst = op1->result_opr();
       if (src == dst) {
         NEEDS_CLEANUP;
         // this works around a problem where moves with the same src and dst
         // end up in the delay slot and then the assembler swallows the mov
         // since it has no effect and then it complains because the delay slot
         // is empty.  returning false stops the optimizer from putting this in
         // the delay slot
         return false;
       }
       // don't put moves involving oops into the delay slot since the VerifyOops code
       // will make it much larger than a single instruction.
       if (VerifyOops) {
         return false;
       }
       if (src->is_double_cpu() || dst->is_double_cpu() || op1->patch_code() != lir_patch_none ||
           ((src->is_double_fpu() || dst->is_double_fpu()) && op1->move_kind() != lir_move_normal)) {
         return false;
       }
       if (UseCompressedOops) {
         if (dst->is_address() && !dst->is_stack() && (dst->type() == T_OBJECT || dst->type() == T_ARRAY)) return false;
         if (src->is_address() && !src->is_stack() && (src->type() == T_OBJECT || src->type() == T_ARRAY)) return false;
       }
       if (dst->is_register()) {
         if (src->is_address() && Assembler::is_simm13(src->as_address_ptr()->disp())) {
           return !PatchALot;
         } else if (src->is_single_stack()) {
           return true;
         }
       }
       if (src->is_register()) {
         if (dst->is_address() && Assembler::is_simm13(dst->as_address_ptr()->disp())) {
           return !PatchALot;
         } else if (dst->is_single_stack()) {
           return true;
         }
       }
       if (dst->is_register() &&
           ((src->is_register() && src->is_single_word() && src->is_same_type(dst)) ||
            (src->is_constant() && LIR_Assembler::is_small_constant(op->as_Op1()->in_opr())))) {
         return true;
       }
       return false;
     }
     default:
       return false;
   }
   ShouldNotReachHere();
 }
 LIR_Opr LIR_Assembler::receiverOpr() {
   return FrameMap::O0_oop_opr;
 }
 LIR_Opr LIR_Assembler::osrBufferPointer() {
   return FrameMap::I0_opr;
 }
 int LIR_Assembler::initial_frame_size_in_bytes() {
   return in_bytes(frame_map()->framesize_in_bytes());
 }
 // inline cache check: the inline cached class is in G5_inline_cache_reg(G5);
 // we fetch the class of the receiver (O0) and compare it with the cached class.
 // If they do not match we jump to slow case.
 int LIR_Assembler::check_icache() {
   int offset = __ offset();
   __ inline_cache_check(O0, G5_inline_cache_reg);
   return offset;
 }
 void LIR_Assembler::osr_entry() {
   // On-stack-replacement entry sequence (interpreter frame layout described in interpreter_sparc.cpp):
   //
   //   1. Create a new compiled activation.
   //   2. Initialize local variables in the compiled activation.  The expression stack must be empty
   //      at the osr_bci; it is not initialized.
   //   3. Jump to the continuation address in compiled code to resume execution.
   // OSR entry point
   offsets()->set_value(CodeOffsets::OSR_Entry, code_offset());
   BlockBegin* osr_entry = compilation()->hir()->osr_entry();
   ValueStack* entry_state = osr_entry->end()->state();
   int number_of_locks = entry_state->locks_size();
   // Create a frame for the compiled activation.
   __ build_frame(initial_frame_size_in_bytes());
   // OSR buffer is
   //
   // locals[nlocals-1..0]
   // monitors[number_of_locks-1..0]
   //
   // 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.
   //   I0: 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_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;
         __ ld_ptr(OSR_buf, slot_offset + 1*BytesPerWord, O7);
         __ cmp_and_br_short(O7, G0, Assembler::notEqual, Assembler::pt, L);
         __ stop("locked object is NULL");
         __ bind(L);
       }
 #endif // ASSERT
       // Copy the lock field into the compiled activation.
       __ ld_ptr(OSR_buf, slot_offset + 0, O7);
       __ st_ptr(O7, frame_map()->address_for_monitor_lock(i));
       __ ld_ptr(OSR_buf, slot_offset + 1*BytesPerWord, O7);
       __ st_ptr(O7, frame_map()->address_for_monitor_object(i));
     }
   }
 }
 // Optimized Library calls
 // 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 left, LIR_Opr right, LIR_Opr dst, CodeEmitInfo* info) {
   Register str0 = left->as_register();
   Register str1 = right->as_register();
   Label Ldone;
   Register result = dst->as_register();
   {
     // Get a pointer to the first character of string0 in tmp0
     //   and get string0.length() in str0
     // Get a pointer to the first character of string1 in tmp1
     //   and get string1.length() in str1
     // Also, get string0.length()-string1.length() in
     //   o7 and get the condition code set
     // Note: some instructions have been hoisted for better instruction scheduling
     Register tmp0 = L0;
     Register tmp1 = L1;
     Register tmp2 = L2;
     int  value_offset = java_lang_String:: value_offset_in_bytes(); // char array
     if (java_lang_String::has_offset_field()) {
       int offset_offset = java_lang_String::offset_offset_in_bytes(); // first character position
       int  count_offset = java_lang_String:: count_offset_in_bytes();
       __ load_heap_oop(str0, value_offset, tmp0);
       __ ld(str0, offset_offset, tmp2);
       __ add(tmp0, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp0);
       __ ld(str0, count_offset, str0);
       __ sll(tmp2, exact_log2(sizeof(jchar)), tmp2);
     } else {
       __ load_heap_oop(str0, value_offset, tmp1);
       __ add(tmp1, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp0);
       __ ld(tmp1, arrayOopDesc::length_offset_in_bytes(), str0);
     }
     // str1 may be null
     add_debug_info_for_null_check_here(info);
     if (java_lang_String::has_offset_field()) {
       int offset_offset = java_lang_String::offset_offset_in_bytes(); // first character position
       int  count_offset = java_lang_String:: count_offset_in_bytes();
       __ load_heap_oop(str1, value_offset, tmp1);
       __ add(tmp0, tmp2, tmp0);
       __ ld(str1, offset_offset, tmp2);
       __ add(tmp1, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp1);
       __ ld(str1, count_offset, str1);
       __ sll(tmp2, exact_log2(sizeof(jchar)), tmp2);
       __ add(tmp1, tmp2, tmp1);
     } else {
       __ load_heap_oop(str1, value_offset, tmp2);
       __ add(tmp2, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp1);
       __ ld(tmp2, arrayOopDesc::length_offset_in_bytes(), str1);
     }
     __ subcc(str0, str1, O7);
   }
   {
     // Compute the minimum of the string lengths, scale it and store it in limit
     Register count0 = I0;
     Register count1 = I1;
     Register limit  = L3;
     Label Lskip;
     __ sll(count0, exact_log2(sizeof(jchar)), limit);             // string0 is shorter
     __ br(Assembler::greater, true, Assembler::pt, Lskip);
     __ delayed()->sll(count1, exact_log2(sizeof(jchar)), limit);  // string1 is shorter
     __ bind(Lskip);
     // If either string is empty (or both of them) the result is the difference in lengths
     __ cmp(limit, 0);
     __ br(Assembler::equal, true, Assembler::pn, Ldone);
     __ delayed()->mov(O7, result);  // result is difference in lengths
   }
   {
     // Neither string is empty
     Label Lloop;
     Register base0 = L0;
     Register base1 = L1;
     Register chr0  = I0;
     Register chr1  = I1;
     Register limit = L3;
     // Shift base0 and base1 to the end of the arrays, negate limit
     __ add(base0, limit, base0);
     __ add(base1, limit, base1);
     __ neg(limit);  // limit = -min{string0.length(), string1.length()}
     __ lduh(base0, limit, chr0);
     __ bind(Lloop);
     __ lduh(base1, limit, chr1);
     __ subcc(chr0, chr1, chr0);
     __ br(Assembler::notZero, false, Assembler::pn, Ldone);
     assert(chr0 == result, "result must be pre-placed");
     __ delayed()->inccc(limit, sizeof(jchar));
     __ br(Assembler::notZero, true, Assembler::pt, Lloop);
     __ delayed()->lduh(base0, limit, chr0);
   }
   // If strings are equal up to min length, return the length difference.
   __ mov(O7, result);
   // Otherwise, return the difference between the first mismatched chars.
   __ bind(Ldone);
 }
 // --------------------------------------------------------------------------------------------
 void LIR_Assembler::monitorexit(LIR_Opr obj_opr, LIR_Opr lock_opr, Register hdr, int monitor_no) {
   if (!GenerateSynchronizationCode) return;
   Register obj_reg = obj_opr->as_register();
   Register lock_reg = lock_opr->as_register();
   Address mon_addr = frame_map()->address_for_monitor_lock(monitor_no);
   Register reg = mon_addr.base();
   int offset = mon_addr.disp();
   // compute pointer to BasicLock
   if (mon_addr.is_simm13()) {
     __ add(reg, offset, lock_reg);
   }
   else {
     __ set(offset, lock_reg);
     __ add(reg, lock_reg, lock_reg);
   }
   // unlock object
   MonitorAccessStub* slow_case = new MonitorExitStub(lock_opr, UseFastLocking, 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
     __ br(Assembler::always, false, Assembler::pt, *slow_case->entry());
     __ delayed()->nop();
   }
   // done
   __ bind(*slow_case->continuation());
 }
 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
   ciMethod* method = compilation()->method();
   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();
   __ call(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id), relocInfo::runtime_call_type);
   __ delayed()->nop();
   __ should_not_reach_here();
   guarantee(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
   __ ld_ptr(G2_thread, in_bytes(JavaThread::exception_oop_offset()), O0);
   __ st_ptr(G0, G2_thread, in_bytes(JavaThread::exception_oop_offset()));
   __ st_ptr(G0, G2_thread, in_bytes(JavaThread::exception_pc_offset()));
   __ bind(_unwind_handler_entry);
   __ verify_not_null_oop(O0);
   if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
     __ mov(O0, I0);  // Preserve the exception
   }
   // Preform needed unlocking
   MonitorExitStub* stub = NULL;
   if (method()->is_synchronized()) {
     monitor_address(0, FrameMap::I1_opr);
     stub = new MonitorExitStub(FrameMap::I1_opr, true, 0);
     __ unlock_object(I3, I2, I1, *stub->entry());
     __ bind(*stub->continuation());
   }
   if (compilation()->env()->dtrace_method_probes()) {
     __ mov(G2_thread, O0);
     __ save_thread(I1); // need to preserve thread in G2 across
                         // runtime call
     metadata2reg(method()->constant_encoding(), O1);
     __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), relocInfo::runtime_call_type);
     __ delayed()->nop();
     __ restore_thread(I1);
   }
   if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
     __ mov(I0, O0);  // Restore the exception
   }
   // dispatch to the unwind logic
   __ call(Runtime1::entry_for(Runtime1::unwind_exception_id), relocInfo::runtime_call_type);
   __ delayed()->nop();
   // 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 deopt handler
   ciMethod* method = compilation()->method();
   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();
   AddressLiteral deopt_blob(SharedRuntime::deopt_blob()->unpack());
   __ JUMP(deopt_blob, G3_scratch, 0); // sethi;jmp
   __ delayed()->nop();
   guarantee(code_offset() - offset <= deopt_handler_size, "overflow");
   __ end_a_stub();
   return offset;
 }
 void LIR_Assembler::jobject2reg(jobject o, Register reg) {
   if (o == NULL) {
     __ set(NULL_WORD, reg);
   } else {
     int oop_index = __ oop_recorder()->find_index(o);
     assert(Universe::heap()->is_in_reserved(JNIHandles::resolve(o)), "should be real oop");
     RelocationHolder rspec = oop_Relocation::spec(oop_index);
     __ set(NULL_WORD, reg, rspec); // Will be set when the nmethod is created
   }
 }
 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo *info) {
   // Allocate a new index in table to hold the object once it's been patched
   int oop_index = __ oop_recorder()->allocate_oop_index(NULL);
   PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_mirror_id, oop_index);
   AddressLiteral addrlit(NULL, oop_Relocation::spec(oop_index));
   assert(addrlit.rspec().type() == relocInfo::oop_type, "must be an oop reloc");
   // It may not seem necessary to use a sethi/add pair to load a NULL into dest, but the
   // NULL will be dynamically patched later and the patched value may be large.  We must
   // therefore generate the sethi/add as a placeholders
   __ patchable_set(addrlit, reg);
   patching_epilog(patch, lir_patch_normal, reg, info);
 }
 void LIR_Assembler::metadata2reg(Metadata* o, Register reg) {
   __ set_metadata_constant(o, reg);
 }
 void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo *info) {
   // Allocate a new index in table to hold the klass once it's been patched
   int index = __ oop_recorder()->allocate_metadata_index(NULL);
   PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id, index);
   AddressLiteral addrlit(NULL, metadata_Relocation::spec(index));
   assert(addrlit.rspec().type() == relocInfo::metadata_type, "must be an metadata reloc");
   // It may not seem necessary to use a sethi/add pair to load a NULL into dest, but the
   // NULL will be dynamically patched later and the patched value may be large.  We must
   // therefore generate the sethi/add as a placeholders
   __ patchable_set(addrlit, reg);
   patching_epilog(patch, lir_patch_normal, reg, info);
 }
 void LIR_Assembler::emit_op3(LIR_Op3* op) {
   Register Rdividend = op->in_opr1()->as_register();
   Register Rdivisor  = noreg;
   Register Rscratch  = op->in_opr3()->as_register();
   Register Rresult   = op->result_opr()->as_register();
   int divisor = -1;
   if (op->in_opr2()->is_register()) {
     Rdivisor = op->in_opr2()->as_register();
   } else {
     divisor = op->in_opr2()->as_constant_ptr()->as_jint();
     assert(Assembler::is_simm13(divisor), "can only handle simm13");
   }
   assert(Rdividend != Rscratch, "");
   assert(Rdivisor  != Rscratch, "");
   assert(op->code() == lir_idiv || op->code() == lir_irem, "Must be irem or idiv");
   if (Rdivisor == noreg && is_power_of_2(divisor)) {
     // convert division by a power of two into some shifts and logical operations
     if (op->code() == lir_idiv) {
       if (divisor == 2) {
         __ srl(Rdividend, 31, Rscratch);
       } else {
         __ sra(Rdividend, 31, Rscratch);
         __ and3(Rscratch, divisor - 1, Rscratch);
       }
       __ add(Rdividend, Rscratch, Rscratch);
       __ sra(Rscratch, log2_intptr(divisor), Rresult);
       return;
     } else {
       if (divisor == 2) {
         __ srl(Rdividend, 31, Rscratch);
       } else {
         __ sra(Rdividend, 31, Rscratch);
         __ and3(Rscratch, divisor - 1,Rscratch);
       }
       __ add(Rdividend, Rscratch, Rscratch);
       __ andn(Rscratch, divisor - 1,Rscratch);
       __ sub(Rdividend, Rscratch, Rresult);
       return;
     }
   }
   __ sra(Rdividend, 31, Rscratch);
   __ wry(Rscratch);
   if (!VM_Version::v9_instructions_work()) {
     // v9 doesn't require these nops
     __ nop();
     __ nop();
     __ nop();
     __ nop();
   }
   add_debug_info_for_div0_here(op->info());
   if (Rdivisor != noreg) {
     __ sdivcc(Rdividend, Rdivisor, (op->code() == lir_idiv ? Rresult : Rscratch));
   } else {
     assert(Assembler::is_simm13(divisor), "can only handle simm13");
     __ sdivcc(Rdividend, divisor, (op->code() == lir_idiv ? Rresult : Rscratch));
   }
   Label skip;
   __ br(Assembler::overflowSet, true, Assembler::pn, skip);
   __ delayed()->Assembler::sethi(0x80000000, (op->code() == lir_idiv ? Rresult : Rscratch));
   __ bind(skip);
   if (op->code() == lir_irem) {
     if (Rdivisor != noreg) {
       __ smul(Rscratch, Rdivisor, Rscratch);
     } else {
       __ smul(Rscratch, divisor, Rscratch);
     }
     __ sub(Rdividend, Rscratch, Rresult);
   }
 }
 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
   assert(op->info() == NULL, "shouldn't have CodeEmitInfo");
   if (op->cond() == lir_cond_always) {
     __ br(Assembler::always, false, Assembler::pt, *(op->label()));
   } else if (op->code() == lir_cond_float_branch) {
     assert(op->ublock() != NULL, "must have unordered successor");
     bool is_unordered = (op->ublock() == op->block());
     Assembler::Condition acond;
     switch (op->cond()) {
       case lir_cond_equal:         acond = Assembler::f_equal;    break;
       case lir_cond_notEqual:      acond = Assembler::f_notEqual; break;
       case lir_cond_less:          acond = (is_unordered ? Assembler::f_unorderedOrLess          : Assembler::f_less);           break;
       case lir_cond_greater:       acond = (is_unordered ? Assembler::f_unorderedOrGreater       : Assembler::f_greater);        break;
       case lir_cond_lessEqual:     acond = (is_unordered ? Assembler::f_unorderedOrLessOrEqual   : Assembler::f_lessOrEqual);    break;
       case lir_cond_greaterEqual:  acond = (is_unordered ? Assembler::f_unorderedOrGreaterOrEqual: Assembler::f_greaterOrEqual); break;
       default :                         ShouldNotReachHere();
     };
     if (!VM_Version::v9_instructions_work()) {
       __ nop();
     }
     __ fb( acond, false, Assembler::pn, *(op->label()));
   } else {
     assert (op->code() == lir_branch, "just checking");
     Assembler::Condition acond;
     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_aboveEqual:   acond = Assembler::greaterEqualUnsigned; break;
       case lir_cond_belowEqual:   acond = Assembler::lessEqualUnsigned;    break;
       default:                         ShouldNotReachHere();
     };
     // sparc has different condition codes for testing 32-bit
     // vs. 64-bit values.  We could always test xcc is we could
     // guarantee that 32-bit loads always sign extended but that isn't
     // true and since sign extension isn't free, it would impose a
     // slight cost.
 #ifdef _LP64
     if  (op->type() == T_INT) {
       __ br(acond, false, Assembler::pn, *(op->label()));
     } else
 #endif
       __ brx(acond, false, Assembler::pn, *(op->label()));
   }
   // The peephole pass fills the delay slot
 }
 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) {
   Bytecodes::Code code = op->bytecode();
   LIR_Opr dst = op->result_opr();
   switch(code) {
     case Bytecodes::_i2l: {
       Register rlo  = dst->as_register_lo();
       Register rhi  = dst->as_register_hi();
       Register rval = op->in_opr()->as_register();
 #ifdef _LP64
       __ sra(rval, 0, rlo);
 #else
       __ mov(rval, rlo);
       __ sra(rval, BitsPerInt-1, rhi);
 #endif
       break;
     }
     case Bytecodes::_i2d:
     case Bytecodes::_i2f: {
       bool is_double = (code == Bytecodes::_i2d);
       FloatRegister rdst = is_double ? dst->as_double_reg() : dst->as_float_reg();
       FloatRegisterImpl::Width w = is_double ? FloatRegisterImpl::D : FloatRegisterImpl::S;
       FloatRegister rsrc = op->in_opr()->as_float_reg();
       if (rsrc != rdst) {
         __ fmov(FloatRegisterImpl::S, rsrc, rdst);
       }
       __ fitof(w, rdst, rdst);
       break;
     }
     case Bytecodes::_f2i:{
       FloatRegister rsrc = op->in_opr()->as_float_reg();
       Address       addr = frame_map()->address_for_slot(dst->single_stack_ix());
       Label L;
       // result must be 0 if value is NaN; test by comparing value to itself
       __ fcmp(FloatRegisterImpl::S, Assembler::fcc0, rsrc, rsrc);
       if (!VM_Version::v9_instructions_work()) {
         __ nop();
       }
       __ fb(Assembler::f_unordered, true, Assembler::pn, L);
       __ delayed()->st(G0, addr); // annuled if contents of rsrc is not NaN
       __ ftoi(FloatRegisterImpl::S, rsrc, rsrc);
       // move integer result from float register to int register
       __ stf(FloatRegisterImpl::S, rsrc, addr.base(), addr.disp());
       __ bind (L);
       break;
     }
     case Bytecodes::_l2i: {
       Register rlo  = op->in_opr()->as_register_lo();
       Register rhi  = op->in_opr()->as_register_hi();
       Register rdst = dst->as_register();
 #ifdef _LP64
       __ sra(rlo, 0, rdst);
 #else
       __ mov(rlo, rdst);
 #endif
       break;
     }
     case Bytecodes::_d2f:
     case Bytecodes::_f2d: {
       bool is_double = (code == Bytecodes::_f2d);
       assert((!is_double && dst->is_single_fpu()) || (is_double && dst->is_double_fpu()), "check");
       LIR_Opr val = op->in_opr();
       FloatRegister rval = (code == Bytecodes::_d2f) ? val->as_double_reg() : val->as_float_reg();
       FloatRegister rdst = is_double ? dst->as_double_reg() : dst->as_float_reg();
       FloatRegisterImpl::Width vw = is_double ? FloatRegisterImpl::S : FloatRegisterImpl::D;
       FloatRegisterImpl::Width dw = is_double ? FloatRegisterImpl::D : FloatRegisterImpl::S;
       __ ftof(vw, dw, rval, rdst);
       break;
     }
     case Bytecodes::_i2s:
     case Bytecodes::_i2b: {
       Register rval = op->in_opr()->as_register();
       Register rdst = dst->as_register();
       int shift = (code == Bytecodes::_i2b) ? (BitsPerInt - T_BYTE_aelem_bytes * BitsPerByte) : (BitsPerInt - BitsPerShort);
       __ sll (rval, shift, rdst);
       __ sra (rdst, shift, rdst);
       break;
     }
     case Bytecodes::_i2c: {
       Register rval = op->in_opr()->as_register();
       Register rdst = dst->as_register();
       int shift = BitsPerInt - T_CHAR_aelem_bytes * BitsPerByte;
       __ sll (rval, shift, rdst);
       __ srl (rdst, shift, rdst);
       break;
     }
     default: ShouldNotReachHere();
   }
 }
 void LIR_Assembler::align_call(LIR_Code) {
   // do nothing since all instructions are word aligned on sparc
 }
 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
   __ call(op->addr(), rtype);
   // The peephole pass fills the delay slot, add_call_info is done in
   // LIR_Assembler::emit_delay.
 }
 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
   __ ic_call(op->addr(), false);
   // The peephole pass fills the delay slot, add_call_info is done in
   // LIR_Assembler::emit_delay.
 }
 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) {
   add_debug_info_for_null_check_here(op->info());
   __ load_klass(O0, G3_scratch);
   if (Assembler::is_simm13(op->vtable_offset())) {
     __ ld_ptr(G3_scratch, op->vtable_offset(), G5_method);
   } else {
     // This will generate 2 instructions
     __ set(op->vtable_offset(), G5_method);
     // ld_ptr, set_hi, set
     __ ld_ptr(G3_scratch, G5_method, G5_method);
   }
   __ ld_ptr(G5_method, Method::from_compiled_offset(), G3_scratch);
   __ callr(G3_scratch, G0);
   // the peephole pass fills the delay slot
 }
 int LIR_Assembler::store(LIR_Opr from_reg, Register base, int offset, BasicType type, bool wide, bool unaligned) {
   int store_offset;
   if (!Assembler::is_simm13(offset + (type == T_LONG) ? wordSize : 0)) {
     assert(!unaligned, "can't handle this");
     // for offsets larger than a simm13 we setup the offset in O7
     __ set(offset, O7);
     store_offset = store(from_reg, base, O7, type, wide);
   } else {
     if (type == T_ARRAY || type == T_OBJECT) {
       __ verify_oop(from_reg->as_register());
     }
     store_offset = code_offset();
     switch (type) {
       case T_BOOLEAN: // fall through
       case T_BYTE  : __ stb(from_reg->as_register(), base, offset); break;
       case T_CHAR  : __ sth(from_reg->as_register(), base, offset); break;
       case T_SHORT : __ sth(from_reg->as_register(), base, offset); break;
       case T_INT   : __ stw(from_reg->as_register(), base, offset); break;
       case T_LONG  :
 #ifdef _LP64
         if (unaligned || PatchALot) {
           __ srax(from_reg->as_register_lo(), 32, O7);
           __ stw(from_reg->as_register_lo(), base, offset + lo_word_offset_in_bytes);
           __ stw(O7,                         base, offset + hi_word_offset_in_bytes);
         } else {
           __ stx(from_reg->as_register_lo(), base, offset);
         }
 #else
         assert(Assembler::is_simm13(offset + 4), "must be");
         __ stw(from_reg->as_register_lo(), base, offset + lo_word_offset_in_bytes);
         __ stw(from_reg->as_register_hi(), base, offset + hi_word_offset_in_bytes);
 #endif
         break;
       case T_ADDRESS:
       case T_METADATA:
         __ st_ptr(from_reg->as_register(), base, offset);
         break;
       case T_ARRAY : // fall through
       case T_OBJECT:
         {
           if (UseCompressedOops && !wide) {
             __ encode_heap_oop(from_reg->as_register(), G3_scratch);
             store_offset = code_offset();
             __ stw(G3_scratch, base, offset);
           } else {
             __ st_ptr(from_reg->as_register(), base, offset);
           }
           break;
         }
       case T_FLOAT : __ stf(FloatRegisterImpl::S, from_reg->as_float_reg(), base, offset); break;
       case T_DOUBLE:
         {
           FloatRegister reg = from_reg->as_double_reg();
           // split unaligned stores
           if (unaligned || PatchALot) {
             assert(Assembler::is_simm13(offset + 4), "must be");
             __ stf(FloatRegisterImpl::S, reg->successor(), base, offset + 4);
             __ stf(FloatRegisterImpl::S, reg,              base, offset);
           } else {
             __ stf(FloatRegisterImpl::D, reg, base, offset);
           }
           break;
         }
       default      : ShouldNotReachHere();
     }
   }
   return store_offset;
 }
 int LIR_Assembler::store(LIR_Opr from_reg, Register base, Register disp, BasicType type, bool wide) {
   if (type == T_ARRAY || type == T_OBJECT) {
     __ verify_oop(from_reg->as_register());
   }
   int store_offset = code_offset();
   switch (type) {
     case T_BOOLEAN: // fall through
     case T_BYTE  : __ stb(from_reg->as_register(), base, disp); break;
     case T_CHAR  : __ sth(from_reg->as_register(), base, disp); break;
     case T_SHORT : __ sth(from_reg->as_register(), base, disp); break;
     case T_INT   : __ stw(from_reg->as_register(), base, disp); break;
     case T_LONG  :
 #ifdef _LP64
       __ stx(from_reg->as_register_lo(), base, disp);
 #else
       assert(from_reg->as_register_hi()->successor() == from_reg->as_register_lo(), "must match");
       __ std(from_reg->as_register_hi(), base, disp);
 #endif
       break;
     case T_ADDRESS:
       __ st_ptr(from_reg->as_register(), base, disp);
       break;
     case T_ARRAY : // fall through
     case T_OBJECT:
       {
         if (UseCompressedOops && !wide) {
           __ encode_heap_oop(from_reg->as_register(), G3_scratch);
           store_offset = code_offset();
           __ stw(G3_scratch, base, disp);
         } else {
           __ st_ptr(from_reg->as_register(), base, disp);
         }
         break;
       }
     case T_FLOAT : __ stf(FloatRegisterImpl::S, from_reg->as_float_reg(), base, disp); break;
     case T_DOUBLE: __ stf(FloatRegisterImpl::D, from_reg->as_double_reg(), base, disp); break;
     default      : ShouldNotReachHere();
   }
   return store_offset;
 }
 int LIR_Assembler::load(Register base, int offset, LIR_Opr to_reg, BasicType type, bool wide, bool unaligned) {
   int load_offset;
   if (!Assembler::is_simm13(offset + (type == T_LONG) ? wordSize : 0)) {
     assert(base != O7, "destroying register");
     assert(!unaligned, "can't handle this");
     // for offsets larger than a simm13 we setup the offset in O7
     __ set(offset, O7);
     load_offset = load(base, O7, to_reg, type, wide);
   } else {
     load_offset = code_offset();
     switch(type) {
       case T_BOOLEAN: // fall through
       case T_BYTE  : __ ldsb(base, offset, to_reg->as_register()); break;
       case T_CHAR  : __ lduh(base, offset, to_reg->as_register()); break;
       case T_SHORT : __ ldsh(base, offset, to_reg->as_register()); break;
       case T_INT   : __ ld(base, offset, to_reg->as_register()); break;
       case T_LONG  :
         if (!unaligned) {
 #ifdef _LP64
           __ ldx(base, offset, to_reg->as_register_lo());
 #else
           assert(to_reg->as_register_hi()->successor() == to_reg->as_register_lo(),
                  "must be sequential");
           __ ldd(base, offset, to_reg->as_register_hi());
 #endif
         } else {
 #ifdef _LP64
           assert(base != to_reg->as_register_lo(), "can't handle this");
           assert(O7 != to_reg->as_register_lo(), "can't handle this");
           __ ld(base, offset + hi_word_offset_in_bytes, to_reg->as_register_lo());
           __ lduw(base, offset + lo_word_offset_in_bytes, O7); // in case O7 is base or offset, use it last
           __ sllx(to_reg->as_register_lo(), 32, to_reg->as_register_lo());
           __ or3(to_reg->as_register_lo(), O7, to_reg->as_register_lo());
 #else
           if (base == to_reg->as_register_lo()) {
             __ ld(base, offset + hi_word_offset_in_bytes, to_reg->as_register_hi());
             __ ld(base, offset + lo_word_offset_in_bytes, to_reg->as_register_lo());
           } else {
             __ ld(base, offset + lo_word_offset_in_bytes, to_reg->as_register_lo());
             __ ld(base, offset + hi_word_offset_in_bytes, to_reg->as_register_hi());
           }
 #endif
         }
         break;
       case T_METADATA:
       case T_ADDRESS:  __ ld_ptr(base, offset, to_reg->as_register()); break;
       case T_ARRAY : // fall through
       case T_OBJECT:
         {
           if (UseCompressedOops && !wide) {
             __ lduw(base, offset, to_reg->as_register());
             __ decode_heap_oop(to_reg->as_register());
           } else {
             __ ld_ptr(base, offset, to_reg->as_register());
           }
           break;
         }
       case T_FLOAT:  __ ldf(FloatRegisterImpl::S, base, offset, to_reg->as_float_reg()); break;
       case T_DOUBLE:
         {
           FloatRegister reg = to_reg->as_double_reg();
           // split unaligned loads
           if (unaligned || PatchALot) {
             __ ldf(FloatRegisterImpl::S, base, offset + 4, reg->successor());
             __ ldf(FloatRegisterImpl::S, base, offset,     reg);
           } else {
             __ ldf(FloatRegisterImpl::D, base, offset, to_reg->as_double_reg());
           }
           break;
         }
       default      : ShouldNotReachHere();
     }
     if (type == T_ARRAY || type == T_OBJECT) {
       __ verify_oop(to_reg->as_register());
     }
   }
   return load_offset;
 }
 int LIR_Assembler::load(Register base, Register disp, LIR_Opr to_reg, BasicType type, bool wide) {
   int load_offset = code_offset();
   switch(type) {
     case T_BOOLEAN: // fall through
     case T_BYTE  :  __ ldsb(base, disp, to_reg->as_register()); break;
     case T_CHAR  :  __ lduh(base, disp, to_reg->as_register()); break;
     case T_SHORT :  __ ldsh(base, disp, to_reg->as_register()); break;
     case T_INT   :  __ ld(base, disp, to_reg->as_register()); break;
     case T_ADDRESS: __ ld_ptr(base, disp, to_reg->as_register()); break;
     case T_ARRAY : // fall through
     case T_OBJECT:
       {
           if (UseCompressedOops && !wide) {
             __ lduw(base, disp, to_reg->as_register());
             __ decode_heap_oop(to_reg->as_register());
           } else {
             __ ld_ptr(base, disp, to_reg->as_register());
           }
           break;
       }
     case T_FLOAT:  __ ldf(FloatRegisterImpl::S, base, disp, to_reg->as_float_reg()); break;
     case T_DOUBLE: __ ldf(FloatRegisterImpl::D, base, disp, to_reg->as_double_reg()); break;
     case T_LONG  :
 #ifdef _LP64
       __ ldx(base, disp, to_reg->as_register_lo());
 #else
       assert(to_reg->as_register_hi()->successor() == to_reg->as_register_lo(),
              "must be sequential");
       __ ldd(base, disp, to_reg->as_register_hi());
 #endif
       break;
     default      : ShouldNotReachHere();
   }
   if (type == T_ARRAY || type == T_OBJECT) {
     __ verify_oop(to_reg->as_register());
   }
   return load_offset;
 }
 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) {
   LIR_Const* c = src->as_constant_ptr();
   switch (c->type()) {
     case T_INT:
     case T_FLOAT: {
       Register src_reg = O7;
       int value = c->as_jint_bits();
       if (value == 0) {
         src_reg = G0;
       } else {
         __ set(value, O7);
       }
       Address addr = frame_map()->address_for_slot(dest->single_stack_ix());
       __ stw(src_reg, addr.base(), addr.disp());
       break;
     }
     case T_ADDRESS: {
       Register src_reg = O7;
       int value = c->as_jint_bits();
       if (value == 0) {
         src_reg = G0;
       } else {
         __ set(value, O7);
       }
       Address addr = frame_map()->address_for_slot(dest->single_stack_ix());
       __ st_ptr(src_reg, addr.base(), addr.disp());
       break;
     }
     case T_OBJECT: {
       Register src_reg = O7;
       jobject2reg(c->as_jobject(), src_reg);
       Address addr = frame_map()->address_for_slot(dest->single_stack_ix());
       __ st_ptr(src_reg, addr.base(), addr.disp());
       break;
     }
     case T_LONG:
     case T_DOUBLE: {
       Address addr = frame_map()->address_for_double_slot(dest->double_stack_ix());
       Register tmp = O7;
       int value_lo = c->as_jint_lo_bits();
       if (value_lo == 0) {
         tmp = G0;
       } else {
         __ set(value_lo, O7);
       }
       __ stw(tmp, addr.base(), addr.disp() + lo_word_offset_in_bytes);
       int value_hi = c->as_jint_hi_bits();
       if (value_hi == 0) {
         tmp = G0;
       } else {
         __ set(value_hi, O7);
       }
       __ stw(tmp, addr.base(), addr.disp() + hi_word_offset_in_bytes);
       break;
     }
     default:
       Unimplemented();
   }
 }
 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) {
   LIR_Const* c = src->as_constant_ptr();
   LIR_Address* addr     = dest->as_address_ptr();
   Register base = addr->base()->as_pointer_register();
   int offset = -1;
   switch (c->type()) {
     case T_INT:
     case T_FLOAT:
     case T_ADDRESS: {
       LIR_Opr tmp = FrameMap::O7_opr;
       int value = c->as_jint_bits();
       if (value == 0) {
         tmp = FrameMap::G0_opr;
       } else if (Assembler::is_simm13(value)) {
         __ set(value, O7);
       }
       if (addr->index()->is_valid()) {
         assert(addr->disp() == 0, "must be zero");
         offset = store(tmp, base, addr->index()->as_pointer_register(), type, wide);
       } else {
         assert(Assembler::is_simm13(addr->disp()), "can't handle larger addresses");
         offset = store(tmp, base, addr->disp(), type, wide, false);
       }
       break;
     }
     case T_LONG:
     case T_DOUBLE: {
       assert(!addr->index()->is_valid(), "can't handle reg reg address here");
       assert(Assembler::is_simm13(addr->disp()) &&
              Assembler::is_simm13(addr->disp() + 4), "can't handle larger addresses");
       LIR_Opr tmp = FrameMap::O7_opr;
       int value_lo = c->as_jint_lo_bits();
       if (value_lo == 0) {
         tmp = FrameMap::G0_opr;
       } else {
         __ set(value_lo, O7);
       }
       offset = store(tmp, base, addr->disp() + lo_word_offset_in_bytes, T_INT, wide, false);
       int value_hi = c->as_jint_hi_bits();
       if (value_hi == 0) {
         tmp = FrameMap::G0_opr;
       } else {
         __ set(value_hi, O7);
       }
       store(tmp, base, addr->disp() + hi_word_offset_in_bytes, T_INT, wide, false);
       break;
     }
     case T_OBJECT: {
       jobject obj = c->as_jobject();
       LIR_Opr tmp;
       if (obj == NULL) {
         tmp = FrameMap::G0_opr;
       } else {
         tmp = FrameMap::O7_opr;
         jobject2reg(c->as_jobject(), O7);
       }
       // handle either reg+reg or reg+disp address
       if (addr->index()->is_valid()) {
         assert(addr->disp() == 0, "must be zero");
         offset = store(tmp, base, addr->index()->as_pointer_register(), type, wide);
       } else {
         assert(Assembler::is_simm13(addr->disp()), "can't handle larger addresses");
         offset = store(tmp, base, addr->disp(), type, wide, false);
       }
       break;
     }
     default:
       Unimplemented();
   }
   if (info != NULL) {
     assert(offset != -1, "offset should've been set");
     add_debug_info_for_null_check(offset, info);
   }
 }
 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
   LIR_Const* c = src->as_constant_ptr();
   LIR_Opr to_reg = dest;
   switch (c->type()) {
     case T_INT:
     case T_ADDRESS:
       {
         jint con = c->as_jint();
         if (to_reg->is_single_cpu()) {
           assert(patch_code == lir_patch_none, "no patching handled here");
           __ set(con, to_reg->as_register());
         } else {
           ShouldNotReachHere();
           assert(to_reg->is_single_fpu(), "wrong register kind");
           __ set(con, O7);
           Address temp_slot(SP, (frame::register_save_words * wordSize) + STACK_BIAS);
           __ st(O7, temp_slot);
           __ ldf(FloatRegisterImpl::S, temp_slot, to_reg->as_float_reg());
         }
       }
       break;
     case T_LONG:
       {
         jlong con = c->as_jlong();
         if (to_reg->is_double_cpu()) {
 #ifdef _LP64
           __ set(con,  to_reg->as_register_lo());
 #else
           __ set(low(con),  to_reg->as_register_lo());
           __ set(high(con), to_reg->as_register_hi());
 #endif
 #ifdef _LP64
         } else if (to_reg->is_single_cpu()) {
           __ set(con, to_reg->as_register());
 #endif
         } else {
           ShouldNotReachHere();
           assert(to_reg->is_double_fpu(), "wrong register kind");
           Address temp_slot_lo(SP, ((frame::register_save_words  ) * wordSize) + STACK_BIAS);
           Address temp_slot_hi(SP, ((frame::register_save_words) * wordSize) + (longSize/2) + STACK_BIAS);
           __ set(low(con),  O7);
           __ st(O7, temp_slot_lo);
           __ set(high(con), O7);
           __ st(O7, temp_slot_hi);
           __ ldf(FloatRegisterImpl::D, temp_slot_lo, to_reg->as_double_reg());
         }
       }
       break;
     case T_OBJECT:
       {
         if (patch_code == lir_patch_none) {
           jobject2reg(c->as_jobject(), to_reg->as_register());
         } else {
           jobject2reg_with_patching(to_reg->as_register(), info);
         }
       }
       break;
     case T_METADATA:
       {
         if (patch_code == lir_patch_none) {
           metadata2reg(c->as_metadata(), to_reg->as_register());
         } else {
           klass2reg_with_patching(to_reg->as_register(), info);
         }
       }
       break;
     case T_FLOAT:
       {
         address const_addr = __ float_constant(c->as_jfloat());
         if (const_addr == NULL) {
           bailout("const section overflow");
           break;
         }
         RelocationHolder rspec = internal_word_Relocation::spec(const_addr);
         AddressLiteral const_addrlit(const_addr, rspec);
         if (to_reg->is_single_fpu()) {
           __ patchable_sethi(const_addrlit, O7);
           __ relocate(rspec);
           __ ldf(FloatRegisterImpl::S, O7, const_addrlit.low10(), to_reg->as_float_reg());
         } else {
           assert(to_reg->is_single_cpu(), "Must be a cpu register.");
           __ set(const_addrlit, O7);
           __ ld(O7, 0, to_reg->as_register());
         }
       }
       break;
     case T_DOUBLE:
       {
         address const_addr = __ double_constant(c->as_jdouble());
         if (const_addr == NULL) {
           bailout("const section overflow");
           break;
         }
         RelocationHolder rspec = internal_word_Relocation::spec(const_addr);
         if (to_reg->is_double_fpu()) {
           AddressLiteral const_addrlit(const_addr, rspec);
           __ patchable_sethi(const_addrlit, O7);
           __ relocate(rspec);
           __ ldf (FloatRegisterImpl::D, O7, const_addrlit.low10(), to_reg->as_double_reg());
         } else {
           assert(to_reg->is_double_cpu(), "Must be a long register.");
 #ifdef _LP64
           __ set(jlong_cast(c->as_jdouble()), to_reg->as_register_lo());
 #else
           __ set(low(jlong_cast(c->as_jdouble())), to_reg->as_register_lo());
           __ set(high(jlong_cast(c->as_jdouble())), to_reg->as_register_hi());
 #endif
         }
       }
       break;
     default:
       ShouldNotReachHere();
   }
 }
 Address LIR_Assembler::as_Address(LIR_Address* addr) {
   Register reg = addr->base()->as_register();
   LIR_Opr index = addr->index();
   if (index->is_illegal()) {
     return Address(reg, addr->disp());
   } else {
     assert (addr->disp() == 0, "unsupported address mode");
     return Address(reg, index->as_pointer_register());
   }
 }
 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
   switch (type) {
     case T_INT:
     case T_FLOAT: {
       Register tmp = O7;
       Address from = frame_map()->address_for_slot(src->single_stack_ix());
       Address to   = frame_map()->address_for_slot(dest->single_stack_ix());
       __ lduw(from.base(), from.disp(), tmp);
       __ stw(tmp, to.base(), to.disp());
       break;
     }
     case T_OBJECT: {
       Register tmp = O7;
       Address from = frame_map()->address_for_slot(src->single_stack_ix());
       Address to   = frame_map()->address_for_slot(dest->single_stack_ix());
       __ ld_ptr(from.base(), from.disp(), tmp);
       __ st_ptr(tmp, to.base(), to.disp());
       break;
     }
     case T_LONG:
     case T_DOUBLE: {
       Register tmp = O7;
       Address from = frame_map()->address_for_double_slot(src->double_stack_ix());
       Address to   = frame_map()->address_for_double_slot(dest->double_stack_ix());
       __ lduw(from.base(), from.disp(), tmp);
       __ stw(tmp, to.base(), to.disp());
       __ lduw(from.base(), from.disp() + 4, tmp);
       __ stw(tmp, to.base(), to.disp() + 4);
       break;
     }
     default:
       ShouldNotReachHere();
   }
 }
 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) {
   Address base = as_Address(addr);
   return Address(base.base(), base.disp() + hi_word_offset_in_bytes);
 }
 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) {
   Address base = as_Address(addr);
   return Address(base.base(), base.disp() + lo_word_offset_in_bytes);
 }
 void LIR_Assembler::mem2reg(LIR_Opr src_opr, LIR_Opr dest, BasicType type,
                             LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool unaligned) {
   assert(type != T_METADATA, "load of metadata ptr not supported");
   LIR_Address* addr = src_opr->as_address_ptr();
   LIR_Opr to_reg = dest;
   Register src = addr->base()->as_pointer_register();
   Register disp_reg = noreg;
   int disp_value = addr->disp();
   bool needs_patching = (patch_code != lir_patch_none);
   if (addr->base()->type() == T_OBJECT) {
     __ verify_oop(src);
   }
   PatchingStub* patch = NULL;
   if (needs_patching) {
     patch = new PatchingStub(_masm, PatchingStub::access_field_id);
     assert(!to_reg->is_double_cpu() ||
            patch_code == lir_patch_none ||
            patch_code == lir_patch_normal, "patching doesn't match register");
   }
   if (addr->index()->is_illegal()) {
     if (!Assembler::is_simm13(disp_value) && (!unaligned || Assembler::is_simm13(disp_value + 4))) {
       if (needs_patching) {
         __ patchable_set(0, O7);
       } else {
         __ set(disp_value, O7);
       }
       disp_reg = O7;
     }
   } else if (unaligned || PatchALot) {
     __ add(src, addr->index()->as_register(), O7);
     src = O7;
   } else {
     disp_reg = addr->index()->as_pointer_register();
     assert(disp_value == 0, "can't handle 3 operand addresses");
   }
   // remember the offset of the load.  The patching_epilog must be done
   // before the call to add_debug_info, otherwise the PcDescs don't get
   // entered in increasing order.
   int offset = code_offset();
   assert(disp_reg != noreg || Assembler::is_simm13(disp_value), "should have set this up");
   if (disp_reg == noreg) {
     offset = load(src, disp_value, to_reg, type, wide, unaligned);
   } else {
     assert(!unaligned, "can't handle this");
     offset = load(src, disp_reg, to_reg, type, wide);
   }
   if (patch != NULL) {
     patching_epilog(patch, patch_code, src, info);
   }
   if (info != NULL) add_debug_info_for_null_check(offset, info);
 }
 void LIR_Assembler::prefetchr(LIR_Opr src) {
   LIR_Address* addr = src->as_address_ptr();
   Address from_addr = as_Address(addr);
   if (VM_Version::has_v9()) {
     __ prefetch(from_addr, Assembler::severalReads);
   }
 }
 void LIR_Assembler::prefetchw(LIR_Opr src) {
   LIR_Address* addr = src->as_address_ptr();
   Address from_addr = as_Address(addr);
   if (VM_Version::has_v9()) {
     __ prefetch(from_addr, Assembler::severalWritesAndPossiblyReads);
   }
 }
 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
   Address addr;
   if (src->is_single_word()) {
     addr = frame_map()->address_for_slot(src->single_stack_ix());
   } else if (src->is_double_word())  {
     addr = frame_map()->address_for_double_slot(src->double_stack_ix());
   }
   bool unaligned = (addr.disp() - STACK_BIAS) % 8 != 0;
   load(addr.base(), addr.disp(), dest, dest->type(), true /*wide*/, unaligned);
 }
 void LIR_Assembler::reg2stack(LIR_Opr from_reg, LIR_Opr dest, BasicType type, bool pop_fpu_stack) {
   Address addr;
   if (dest->is_single_word()) {
     addr = frame_map()->address_for_slot(dest->single_stack_ix());
   } else if (dest->is_double_word())  {
     addr = frame_map()->address_for_slot(dest->double_stack_ix());
   }
   bool unaligned = (addr.disp() - STACK_BIAS) % 8 != 0;
   store(from_reg, addr.base(), addr.disp(), from_reg->type(), true /*wide*/, unaligned);
 }
 void LIR_Assembler::reg2reg(LIR_Opr from_reg, LIR_Opr to_reg) {
   if (from_reg->is_float_kind() && to_reg->is_float_kind()) {
     if (from_reg->is_double_fpu()) {
       // double to double moves
       assert(to_reg->is_double_fpu(), "should match");
       __ fmov(FloatRegisterImpl::D, from_reg->as_double_reg(), to_reg->as_double_reg());
     } else {
       // float to float moves
       assert(to_reg->is_single_fpu(), "should match");
       __ fmov(FloatRegisterImpl::S, from_reg->as_float_reg(), to_reg->as_float_reg());
     }
   } else if (!from_reg->is_float_kind() && !to_reg->is_float_kind()) {
     if (from_reg->is_double_cpu()) {
 #ifdef _LP64
       __ mov(from_reg->as_pointer_register(), to_reg->as_pointer_register());
 #else
       assert(to_reg->is_double_cpu() &&
              from_reg->as_register_hi() != to_reg->as_register_lo() &&
              from_reg->as_register_lo() != to_reg->as_register_hi(),
              "should both be long and not overlap");
       // long to long moves
       __ mov(from_reg->as_register_hi(), to_reg->as_register_hi());
       __ mov(from_reg->as_register_lo(), to_reg->as_register_lo());
 #endif
 #ifdef _LP64
     } else if (to_reg->is_double_cpu()) {
       // int to int moves
       __ mov(from_reg->as_register(), to_reg->as_register_lo());
 #endif
     } else {
       // int to int moves
       __ mov(from_reg->as_register(), to_reg->as_register());
     }
   } else {
     ShouldNotReachHere();
   }
   if (to_reg->type() == T_OBJECT || to_reg->type() == T_ARRAY) {
     __ verify_oop(to_reg->as_register());
   }
 }
 void LIR_Assembler::reg2mem(LIR_Opr from_reg, LIR_Opr dest, BasicType type,
                             LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack,
                             bool wide, bool unaligned) {
   assert(type != T_METADATA, "store of metadata ptr not supported");
   LIR_Address* addr = dest->as_address_ptr();
   Register src = addr->base()->as_pointer_register();
   Register disp_reg = noreg;
   int disp_value = addr->disp();
   bool needs_patching = (patch_code != lir_patch_none);
   if (addr->base()->is_oop_register()) {
     __ verify_oop(src);
   }
   PatchingStub* patch = NULL;
   if (needs_patching) {
     patch = new PatchingStub(_masm, PatchingStub::access_field_id);
     assert(!from_reg->is_double_cpu() ||
            patch_code == lir_patch_none ||
            patch_code == lir_patch_normal, "patching doesn't match register");
   }
   if (addr->index()->is_illegal()) {
     if (!Assembler::is_simm13(disp_value) && (!unaligned || Assembler::is_simm13(disp_value + 4))) {
       if (needs_patching) {
         __ patchable_set(0, O7);
       } else {
         __ set(disp_value, O7);
       }
       disp_reg = O7;
     }
   } else if (unaligned || PatchALot) {
     __ add(src, addr->index()->as_register(), O7);
     src = O7;
   } else {
     disp_reg = addr->index()->as_pointer_register();
     assert(disp_value == 0, "can't handle 3 operand addresses");
   }
   // remember the offset of the store.  The patching_epilog must be done
   // before the call to add_debug_info_for_null_check, otherwise the PcDescs don't get
   // entered in increasing order.
   int offset;
   assert(disp_reg != noreg || Assembler::is_simm13(disp_value), "should have set this up");
   if (disp_reg == noreg) {
     offset = store(from_reg, src, disp_value, type, wide, unaligned);
   } else {
     assert(!unaligned, "can't handle this");
     offset = store(from_reg, src, disp_reg, type, wide);
   }
   if (patch != NULL) {
     patching_epilog(patch, patch_code, src, info);
   }
   if (info != NULL) add_debug_info_for_null_check(offset, info);
 }
 void LIR_Assembler::return_op(LIR_Opr result) {
   // the poll may need a register so just pick one that isn't the return register
 #if defined(TIERED) && !defined(_LP64)
   if (result->type_field() == LIR_OprDesc::long_type) {
     // Must move the result to G1
     // Must leave proper result in O0,O1 and G1 (TIERED only)
     __ sllx(I0, 32, G1);          // Shift bits into high G1
     __ srl (I1, 0, I1);           // Zero extend O1 (harmless?)
     __ or3 (I1, G1, G1);          // OR 64 bits into G1
 #ifdef ASSERT
     // mangle it so any problems will show up
     __ set(0xdeadbeef, I0);
     __ set(0xdeadbeef, I1);
 #endif
   }
 #endif // TIERED
   __ set((intptr_t)os::get_polling_page(), L0);
   __ relocate(relocInfo::poll_return_type);
   __ ld_ptr(L0, 0, G0);
   __ ret();
   __ delayed()->restore();
 }
 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
   __ set((intptr_t)os::get_polling_page(), tmp->as_register());
   if (info != NULL) {
     add_debug_info_for_branch(info);
   } else {
     __ relocate(relocInfo::poll_type);
   }
   int offset = __ offset();
   __ ld_ptr(tmp->as_register(), 0, G0);
   return offset;
 }
 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();
   __ relocate(static_stub_Relocation::spec(call_pc));
   __ set_metadata(NULL, G5);
   // must be set to -1 at code generation time
   AddressLiteral addrlit(-1);
   __ jump_to(addrlit, G3);
   __ delayed()->nop();
   assert(__ offset() - start <= call_stub_size, "stub too big");
   __ end_a_stub();
 }
 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) {
   if (opr1->is_single_fpu()) {
     __ fcmp(FloatRegisterImpl::S, Assembler::fcc0, opr1->as_float_reg(), opr2->as_float_reg());
   } else if (opr1->is_double_fpu()) {
     __ fcmp(FloatRegisterImpl::D, Assembler::fcc0, opr1->as_double_reg(), opr2->as_double_reg());
   } else if (opr1->is_single_cpu()) {
     if (opr2->is_constant()) {
       switch (opr2->as_constant_ptr()->type()) {
         case T_INT:
           { jint con = opr2->as_constant_ptr()->as_jint();
             if (Assembler::is_simm13(con)) {
               __ cmp(opr1->as_register(), con);
             } else {
               __ set(con, O7);
               __ cmp(opr1->as_register(), O7);
             }
           }
           break;
         case T_OBJECT:
           // there are only equal/notequal comparisions on objects
           { jobject con = opr2->as_constant_ptr()->as_jobject();
             if (con == NULL) {
               __ cmp(opr1->as_register(), 0);
             } else {
               jobject2reg(con, O7);
               __ cmp(opr1->as_register(), O7);
             }
           }
           break;
         default:
           ShouldNotReachHere();
           break;
       }
     } else {
       if (opr2->is_address()) {
         LIR_Address * addr = opr2->as_address_ptr();
         BasicType type = addr->type();
         if ( type == T_OBJECT ) __ ld_ptr(as_Address(addr), O7);
         else                    __ ld(as_Address(addr), O7);
         __ cmp(opr1->as_register(), O7);
       } else {
         __ cmp(opr1->as_register(), opr2->as_register());
       }
     }
   } else if (opr1->is_double_cpu()) {
     Register xlo = opr1->as_register_lo();
     Register xhi = opr1->as_register_hi();
     if (opr2->is_constant() && opr2->as_jlong() == 0) {
       assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles these cases");
 #ifdef _LP64
       __ orcc(xhi, G0, G0);
 #else
       __ orcc(xhi, xlo, G0);
 #endif
     } else if (opr2->is_register()) {
       Register ylo = opr2->as_register_lo();
       Register yhi = opr2->as_register_hi();
 #ifdef _LP64
       __ cmp(xlo, ylo);
 #else
       __ subcc(xlo, ylo, xlo);
       __ subccc(xhi, yhi, xhi);
       if (condition == lir_cond_equal || condition == lir_cond_notEqual) {
         __ orcc(xhi, xlo, G0);
       }
 #endif
     } else {
       ShouldNotReachHere();
     }
   } else if (opr1->is_address()) {
     LIR_Address * addr = opr1->as_address_ptr();
     BasicType type = addr->type();
     assert (opr2->is_constant(), "Checking");
     if ( type == T_OBJECT ) __ ld_ptr(as_Address(addr), O7);
     else                    __ ld(as_Address(addr), O7);
     __ cmp(O7, opr2->as_constant_ptr()->as_jint());
   } 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) {
     bool is_unordered_less = (code == lir_ucmp_fd2i);
     if (left->is_single_fpu()) {
       __ float_cmp(true, is_unordered_less ? -1 : 1, left->as_float_reg(), right->as_float_reg(), dst->as_register());
     } else if (left->is_double_fpu()) {
       __ float_cmp(false, is_unordered_less ? -1 : 1, left->as_double_reg(), right->as_double_reg(), dst->as_register());
     } else {
       ShouldNotReachHere();
     }
   } else if (code == lir_cmp_l2i) {
 #ifdef _LP64
     __ lcmp(left->as_register_lo(), right->as_register_lo(), dst->as_register());
 #else
     __ lcmp(left->as_register_hi(),  left->as_register_lo(),
             right->as_register_hi(), right->as_register_lo(),
             dst->as_register());
 #endif
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) {
   Assembler::Condition acond;
   switch (condition) {
     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_aboveEqual:   acond = Assembler::greaterEqualUnsigned;      break;
     case lir_cond_belowEqual:   acond = Assembler::lessEqualUnsigned;      break;
     default:                         ShouldNotReachHere();
   };
   if (opr1->is_constant() && opr1->type() == T_INT) {
     Register dest = result->as_register();
     // load up first part of constant before branch
     // and do the rest in the delay slot.
     if (!Assembler::is_simm13(opr1->as_jint())) {
       __ sethi(opr1->as_jint(), dest);
     }
   } else if (opr1->is_constant()) {
     const2reg(opr1, result, lir_patch_none, NULL);
   } else if (opr1->is_register()) {
     reg2reg(opr1, result);
   } else if (opr1->is_stack()) {
     stack2reg(opr1, result, result->type());
   } else {
     ShouldNotReachHere();
   }
   Label skip;
 #ifdef _LP64
     if  (type == T_INT) {
       __ br(acond, false, Assembler::pt, skip);
     } else
 #endif
       __ brx(acond, false, Assembler::pt, skip); // checks icc on 32bit and xcc on 64bit
   if (opr1->is_constant() && opr1->type() == T_INT) {
     Register dest = result->as_register();
     if (Assembler::is_simm13(opr1->as_jint())) {
       __ delayed()->or3(G0, opr1->as_jint(), dest);
     } else {
       // the sethi has been done above, so just put in the low 10 bits
       __ delayed()->or3(dest, opr1->as_jint() & 0x3ff, dest);
     }
   } else {
     // can't do anything useful in the delay slot
     __ delayed()->nop();
   }
   if (opr2->is_constant()) {
     const2reg(opr2, result, lir_patch_none, NULL);
   } else if (opr2->is_register()) {
     reg2reg(opr2, result);
   } else if (opr2->is_stack()) {
     stack2reg(opr2, result, result->type());
   } 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, "unused on this code path");
   assert(left->is_register(), "wrong items state");
   assert(dest->is_register(), "wrong items state");
   if (right->is_register()) {
     if (dest->is_float_kind()) {
       FloatRegister lreg, rreg, res;
       FloatRegisterImpl::Width w;
       if (right->is_single_fpu()) {
         w = FloatRegisterImpl::S;
         lreg = left->as_float_reg();
         rreg = right->as_float_reg();
         res  = dest->as_float_reg();
       } else {
         w = FloatRegisterImpl::D;
         lreg = left->as_double_reg();
         rreg = right->as_double_reg();
         res  = dest->as_double_reg();
       }
       switch (code) {
         case lir_add: __ fadd(w, lreg, rreg, res); break;
         case lir_sub: __ fsub(w, lreg, rreg, res); break;
         case lir_mul: // fall through
         case lir_mul_strictfp: __ fmul(w, lreg, rreg, res); break;
         case lir_div: // fall through
         case lir_div_strictfp: __ fdiv(w, lreg, rreg, res); break;
         default: ShouldNotReachHere();
       }
     } else if (dest->is_double_cpu()) {
 #ifdef _LP64
       Register dst_lo = dest->as_register_lo();
       Register op1_lo = left->as_pointer_register();
       Register op2_lo = right->as_pointer_register();
       switch (code) {
         case lir_add:
           __ add(op1_lo, op2_lo, dst_lo);
           break;
         case lir_sub:
           __ sub(op1_lo, op2_lo, dst_lo);
           break;
         default: ShouldNotReachHere();
       }
 #else
       Register op1_lo = left->as_register_lo();
       Register op1_hi = left->as_register_hi();
       Register op2_lo = right->as_register_lo();
       Register op2_hi = right->as_register_hi();
       Register dst_lo = dest->as_register_lo();
       Register dst_hi = dest->as_register_hi();
       switch (code) {
         case lir_add:
           __ addcc(op1_lo, op2_lo, dst_lo);
           __ addc (op1_hi, op2_hi, dst_hi);
           break;
         case lir_sub:
           __ subcc(op1_lo, op2_lo, dst_lo);
           __ subc (op1_hi, op2_hi, dst_hi);
           break;
         default: ShouldNotReachHere();
       }
 #endif
     } else {
       assert (right->is_single_cpu(), "Just Checking");
       Register lreg = left->as_register();
       Register res  = dest->as_register();
       Register rreg = right->as_register();
       switch (code) {
         case lir_add:  __ add  (lreg, rreg, res); break;
         case lir_sub:  __ sub  (lreg, rreg, res); break;
         case lir_mul:  __ mult (lreg, rreg, res); break;
         default: ShouldNotReachHere();
       }
     }
   } else {
     assert (right->is_constant(), "must be constant");
     if (dest->is_single_cpu()) {
       Register lreg = left->as_register();
       Register res  = dest->as_register();
       int    simm13 = right->as_constant_ptr()->as_jint();
       switch (code) {
         case lir_add:  __ add  (lreg, simm13, res); break;
         case lir_sub:  __ sub  (lreg, simm13, res); break;
         case lir_mul:  __ mult (lreg, simm13, res); break;
         default: ShouldNotReachHere();
       }
     } else {
       Register lreg = left->as_pointer_register();
       Register res  = dest->as_register_lo();
       long con = right->as_constant_ptr()->as_jlong();
       assert(Assembler::is_simm13(con), "must be simm13");
       switch (code) {
         case lir_add:  __ add  (lreg, (int)con, res); break;
         case lir_sub:  __ sub  (lreg, (int)con, res); break;
         case lir_mul:  __ mult (lreg, (int)con, res); break;
         default: ShouldNotReachHere();
       }
     }
   }
 }
 void LIR_Assembler::fpop() {
   // do nothing
 }
 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr thread, LIR_Opr dest, LIR_Op* op) {
   switch (code) {
     case lir_sin:
     case lir_tan:
     case lir_cos: {
       assert(thread->is_valid(), "preserve the thread object for performance reasons");
       assert(dest->as_double_reg() == F0, "the result will be in f0/f1");
       break;
     }
     case lir_sqrt: {
       assert(!thread->is_valid(), "there is no need for a thread_reg for dsqrt");
       FloatRegister src_reg = value->as_double_reg();
       FloatRegister dst_reg = dest->as_double_reg();
       __ fsqrt(FloatRegisterImpl::D, src_reg, dst_reg);
       break;
     }
     case lir_abs: {
       assert(!thread->is_valid(), "there is no need for a thread_reg for fabs");
       FloatRegister src_reg = value->as_double_reg();
       FloatRegister dst_reg = dest->as_double_reg();
       __ fabs(FloatRegisterImpl::D, src_reg, dst_reg);
       break;
     }
     default: {
       ShouldNotReachHere();
       break;
     }
   }
 }
 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest) {
   if (right->is_constant()) {
     if (dest->is_single_cpu()) {
       int simm13 = right->as_constant_ptr()->as_jint();
       switch (code) {
         case lir_logic_and:   __ and3 (left->as_register(), simm13, dest->as_register()); break;
         case lir_logic_or:    __ or3  (left->as_register(), simm13, dest->as_register()); break;
         case lir_logic_xor:   __ xor3 (left->as_register(), simm13, dest->as_register()); break;
         default: ShouldNotReachHere();
       }
     } else {
       long c = right->as_constant_ptr()->as_jlong();
       assert(c == (int)c && Assembler::is_simm13(c), "out of range");
       int simm13 = (int)c;
       switch (code) {
         case lir_logic_and:
 #ifndef _LP64
           __ and3 (left->as_register_hi(), 0,      dest->as_register_hi());
 #endif
           __ and3 (left->as_register_lo(), simm13, dest->as_register_lo());
           break;
         case lir_logic_or:
 #ifndef _LP64
           __ or3 (left->as_register_hi(), 0,      dest->as_register_hi());
 #endif
           __ or3 (left->as_register_lo(), simm13, dest->as_register_lo());
           break;
         case lir_logic_xor:
 #ifndef _LP64
           __ xor3 (left->as_register_hi(), 0,      dest->as_register_hi());
 #endif
           __ xor3 (left->as_register_lo(), simm13, dest->as_register_lo());
           break;
         default: ShouldNotReachHere();
       }
     }
   } else {
     assert(right->is_register(), "right should be in register");
     if (dest->is_single_cpu()) {
       switch (code) {
         case lir_logic_and:   __ and3 (left->as_register(), right->as_register(), dest->as_register()); break;
         case lir_logic_or:    __ or3  (left->as_register(), right->as_register(), dest->as_register()); break;
         case lir_logic_xor:   __ xor3 (left->as_register(), right->as_register(), dest->as_register()); break;
         default: ShouldNotReachHere();
       }
     } else {
 #ifdef _LP64
       Register l = (left->is_single_cpu() && left->is_oop_register()) ? left->as_register() :
                                                                         left->as_register_lo();
       Register r = (right->is_single_cpu() && right->is_oop_register()) ? right->as_register() :
                                                                           right->as_register_lo();
       switch (code) {
         case lir_logic_and: __ and3 (l, r, dest->as_register_lo()); break;
         case lir_logic_or:  __ or3  (l, r, dest->as_register_lo()); break;
         case lir_logic_xor: __ xor3 (l, r, dest->as_register_lo()); break;
         default: ShouldNotReachHere();
       }
 #else
       switch (code) {
         case lir_logic_and:
           __ and3 (left->as_register_hi(), right->as_register_hi(), dest->as_register_hi());
           __ and3 (left->as_register_lo(), right->as_register_lo(), dest->as_register_lo());
           break;
         case lir_logic_or:
           __ or3 (left->as_register_hi(), right->as_register_hi(), dest->as_register_hi());
           __ or3 (left->as_register_lo(), right->as_register_lo(), dest->as_register_lo());
           break;
         case lir_logic_xor:
           __ xor3 (left->as_register_hi(), right->as_register_hi(), dest->as_register_hi());
           __ xor3 (left->as_register_lo(), right->as_register_lo(), dest->as_register_lo());
           break;
         default: ShouldNotReachHere();
       }
 #endif
     }
   }
 }
 int LIR_Assembler::shift_amount(BasicType t) {
   int elem_size = type2aelembytes(t);
   switch (elem_size) {
     case 1 : return 0;
     case 2 : return 1;
     case 4 : return 2;
     case 8 : return 3;
   }
   ShouldNotReachHere();
   return -1;
 }
 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
   assert(exceptionOop->as_register() == Oexception, "should match");
   assert(exceptionPC->as_register() == Oissuing_pc, "should match");
   info->add_register_oop(exceptionOop);
   // reuse the debug info from the safepoint poll for the throw op itself
   address pc_for_athrow  = __ pc();
   int pc_for_athrow_offset = __ offset();
   RelocationHolder rspec = internal_word_Relocation::spec(pc_for_athrow);
   __ set(pc_for_athrow, Oissuing_pc, rspec);
   add_call_info(pc_for_athrow_offset, info); // for exception handler
   __ call(Runtime1::entry_for(Runtime1::handle_exception_id), relocInfo::runtime_call_type);
   __ delayed()->nop();
 }
 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) {
   assert(exceptionOop->as_register() == Oexception, "should match");
   __ br(Assembler::always, false, Assembler::pt, _unwind_handler_entry);
   __ delayed()->nop();
 }
 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
   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();
   Register tmp2 = O7;
   int flags = op->flags();
   ciArrayKlass* default_type = op->expected_type();
   BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL;
   if (basic_type == T_ARRAY) basic_type = T_OBJECT;
 #ifdef _LP64
   // higher 32bits must be null
   __ sra(dst_pos, 0, dst_pos);
   __ sra(src_pos, 0, src_pos);
   __ sra(length, 0, length);
 #endif
   // set up the arraycopy stub information
   ArrayCopyStub* stub = op->stub();
   // always do stub if no type information is available.  it's ok if
   // the known type isn't loaded since the code sanity checks
   // in debug mode and the type isn't required when we know the exact type
   // also check that the type is an array type.
   if (op->expected_type() == NULL) {
     __ mov(src,     O0);
     __ mov(src_pos, O1);
     __ mov(dst,     O2);
     __ mov(dst_pos, O3);
     __ mov(length,  O4);
     address copyfunc_addr = StubRoutines::generic_arraycopy();
     if (copyfunc_addr == NULL) { // Use C version if stub was not generated
       __ call_VM_leaf(tmp, CAST_FROM_FN_PTR(address, Runtime1::arraycopy));
     } else {
 #ifndef PRODUCT
       if (PrintC1Statistics) {
         address counter = (address)&Runtime1::_generic_arraycopystub_cnt;
         __ inc_counter(counter, G1, G3);
       }
 #endif
       __ call_VM_leaf(tmp, copyfunc_addr);
     }
     if (copyfunc_addr != NULL) {
       __ xor3(O0, -1, tmp);
       __ sub(length, tmp, length);
       __ add(src_pos, tmp, src_pos);
       __ cmp_zero_and_br(Assembler::less, O0, *stub->entry());
       __ delayed()->add(dst_pos, tmp, dst_pos);
     } else {
       __ cmp_zero_and_br(Assembler::less, O0, *stub->entry());
       __ delayed()->nop();
     }
     __ bind(*stub->continuation());
     return;
   }
   assert(default_type != NULL && default_type->is_array_klass(), "must be true at this point");
   // make sure src and dst are non-null and load array length
   if (flags & LIR_OpArrayCopy::src_null_check) {
     __ tst(src);
     __ brx(Assembler::equal, false, Assembler::pn, *stub->entry());
     __ delayed()->nop();
   }
   if (flags & LIR_OpArrayCopy::dst_null_check) {
     __ tst(dst);
     __ brx(Assembler::equal, false, Assembler::pn, *stub->entry());
     __ delayed()->nop();
   }
   if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
     // test src_pos register
     __ cmp_zero_and_br(Assembler::less, src_pos, *stub->entry());
     __ delayed()->nop();
   }
   if (flags & LIR_OpArrayCopy::dst_pos_positive_check) {
     // test dst_pos register
     __ cmp_zero_and_br(Assembler::less, dst_pos, *stub->entry());
     __ delayed()->nop();
   }
   if (flags & LIR_OpArrayCopy::length_positive_check) {
     // make sure length isn't negative
     __ cmp_zero_and_br(Assembler::less, length, *stub->entry());
     __ delayed()->nop();
   }
   if (flags & LIR_OpArrayCopy::src_range_check) {
     __ ld(src, arrayOopDesc::length_offset_in_bytes(), tmp2);
     __ add(length, src_pos, tmp);
     __ cmp(tmp2, tmp);
     __ br(Assembler::carrySet, false, Assembler::pn, *stub->entry());
     __ delayed()->nop();
   }
   if (flags & LIR_OpArrayCopy::dst_range_check) {
     __ ld(dst, arrayOopDesc::length_offset_in_bytes(), tmp2);
     __ add(length, dst_pos, tmp);
     __ cmp(tmp2, tmp);
     __ br(Assembler::carrySet, false, Assembler::pn, *stub->entry());
     __ delayed()->nop();
   }
   int shift = shift_amount(basic_type);
   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 (UseCompressedKlassPointers) {
         // We don't need decode because we just need to compare
         __ lduw(src, oopDesc::klass_offset_in_bytes(), tmp);
         __ lduw(dst, oopDesc::klass_offset_in_bytes(), tmp2);
         __ cmp(tmp, tmp2);
         __ br(Assembler::notEqual, false, Assembler::pt, *stub->entry());
       } else {
         __ ld_ptr(src, oopDesc::klass_offset_in_bytes(), tmp);
         __ ld_ptr(dst, oopDesc::klass_offset_in_bytes(), tmp2);
         __ cmp(tmp, tmp2);
         __ brx(Assembler::notEqual, false, Assembler::pt, *stub->entry());
       }
       __ delayed()->nop();
     } else {
       // For object arrays, if src is a sub class of dst then we can
       // safely do the copy.
       address copyfunc_addr = StubRoutines::checkcast_arraycopy();
       Label cont, slow;
       assert_different_registers(tmp, tmp2, G3, G1);
       __ load_klass(src, G3);
       __ load_klass(dst, G1);
       __ check_klass_subtype_fast_path(G3, G1, tmp, tmp2, &cont, copyfunc_addr == NULL ? stub->entry() : &slow, NULL);
       __ call(Runtime1::entry_for(Runtime1::slow_subtype_check_id), relocInfo::runtime_call_type);
       __ delayed()->nop();
       __ cmp(G3, 0);
       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.
         __ br(Assembler::notEqual, false, Assembler::pt, cont);
         __ delayed()->nop();
         __ bind(slow);
         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(src, tmp);
           } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
             __ load_klass(dst, tmp);
           }
           int lh_offset = in_bytes(Klass::layout_helper_offset());
           __ lduw(tmp, lh_offset, tmp2);
           jint objArray_lh = Klass::array_layout_helper(T_OBJECT);
           __ set(objArray_lh, tmp);
           __ cmp(tmp, tmp2);
           __ br(Assembler::notEqual, false, Assembler::pt,  *stub->entry());
           __ delayed()->nop();
         }
         Register src_ptr = O0;
         Register dst_ptr = O1;
         Register len     = O2;
         Register chk_off = O3;
         Register super_k = O4;
         __ add(src, arrayOopDesc::base_offset_in_bytes(basic_type), src_ptr);
         if (shift == 0) {
           __ add(src_ptr, src_pos, src_ptr);
         } else {
           __ sll(src_pos, shift, tmp);
           __ add(src_ptr, tmp, src_ptr);
         }
         __ add(dst, arrayOopDesc::base_offset_in_bytes(basic_type), dst_ptr);
         if (shift == 0) {
           __ add(dst_ptr, dst_pos, dst_ptr);
         } else {
           __ sll(dst_pos, shift, tmp);
           __ add(dst_ptr, tmp, dst_ptr);
         }
         __ mov(length, len);
         __ load_klass(dst, tmp);
         int ek_offset = in_bytes(objArrayKlass::element_klass_offset());
         __ ld_ptr(tmp, ek_offset, super_k);
         int sco_offset = in_bytes(Klass::super_check_offset_offset());
         __ lduw(super_k, sco_offset, chk_off);
         __ call_VM_leaf(tmp, copyfunc_addr);
 #ifndef PRODUCT
         if (PrintC1Statistics) {
           Label failed;
           __ br_notnull_short(O0, Assembler::pn, failed);
           __ inc_counter((address)&Runtime1::_arraycopy_checkcast_cnt, G1, G3);
           __ bind(failed);
         }
 #endif
         __ br_null(O0, false, Assembler::pt,  *stub->continuation());
         __ delayed()->xor3(O0, -1, tmp);
 #ifndef PRODUCT
         if (PrintC1Statistics) {
           __ inc_counter((address)&Runtime1::_arraycopy_checkcast_attempt_cnt, G1, G3);
         }
 #endif
         __ sub(length, tmp, length);
         __ add(src_pos, tmp, src_pos);
         __ br(Assembler::always, false, Assembler::pt, *stub->entry());
         __ delayed()->add(dst_pos, tmp, dst_pos);
         __ bind(cont);
       } else {
         __ br(Assembler::equal, false, Assembler::pn, *stub->entry());
         __ delayed()->nop();
         __ bind(cont);
       }
     }
   }
 #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;
     metadata2reg(op->expected_type()->constant_encoding(), tmp);
     if (UseCompressedKlassPointers) {
       // tmp holds the default type. It currently comes uncompressed after the
       // load of a constant, so encode it.
       __ encode_heap_oop(tmp);
       // load the raw value of the dst klass, since we will be comparing
       // uncompressed values directly.
       __ lduw(dst, oopDesc::klass_offset_in_bytes(), tmp2);
       if (basic_type != T_OBJECT) {
         __ cmp(tmp, tmp2);
         __ br(Assembler::notEqual, false, Assembler::pn, halt);
         // load the raw value of the src klass.
         __ delayed()->lduw(src, oopDesc::klass_offset_in_bytes(), tmp2);
         __ cmp_and_br_short(tmp, tmp2, Assembler::equal, Assembler::pn, known_ok);
       } else {
         __ cmp(tmp, tmp2);
         __ br(Assembler::equal, false, Assembler::pn, known_ok);
         __ delayed()->cmp(src, dst);
         __ brx(Assembler::equal, false, Assembler::pn, known_ok);
         __ delayed()->nop();
       }
     } else {
       __ ld_ptr(dst, oopDesc::klass_offset_in_bytes(), tmp2);
       if (basic_type != T_OBJECT) {
         __ cmp(tmp, tmp2);
         __ brx(Assembler::notEqual, false, Assembler::pn, halt);
         __ delayed()->ld_ptr(src, oopDesc::klass_offset_in_bytes(), tmp2);
         __ cmp_and_brx_short(tmp, tmp2, Assembler::equal, Assembler::pn, known_ok);
       } else {
         __ cmp(tmp, tmp2);
         __ brx(Assembler::equal, false, Assembler::pn, known_ok);
         __ delayed()->cmp(src, dst);
         __ brx(Assembler::equal, false, Assembler::pn, known_ok);
         __ delayed()->nop();
       }
     }
     __ bind(halt);
     __ stop("incorrect type information in arraycopy");
     __ bind(known_ok);
   }
 #endif
 #ifndef PRODUCT
   if (PrintC1Statistics) {
     address counter = Runtime1::arraycopy_count_address(basic_type);
     __ inc_counter(counter, G1, G3);
   }
 #endif
   Register src_ptr = O0;
   Register dst_ptr = O1;
   Register len     = O2;
   __ add(src, arrayOopDesc::base_offset_in_bytes(basic_type), src_ptr);
   if (shift == 0) {
     __ add(src_ptr, src_pos, src_ptr);
   } else {
     __ sll(src_pos, shift, tmp);
     __ add(src_ptr, tmp, src_ptr);
   }
   __ add(dst, arrayOopDesc::base_offset_in_bytes(basic_type), dst_ptr);
   if (shift == 0) {
     __ add(dst_ptr, dst_pos, dst_ptr);
   } else {
     __ sll(dst_pos, shift, tmp);
     __ add(dst_ptr, tmp, dst_ptr);
   }
   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);
   // arraycopy stubs takes a length in number of elements, so don't scale it.
   __ mov(length, len);
   __ call_VM_leaf(tmp, entry);
   __ bind(*stub->continuation());
 }
 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) {
   if (dest->is_single_cpu()) {
 #ifdef _LP64
     if (left->type() == T_OBJECT) {
       switch (code) {
         case lir_shl:  __ sllx  (left->as_register(), count->as_register(), dest->as_register()); break;
         case lir_shr:  __ srax  (left->as_register(), count->as_register(), dest->as_register()); break;
         case lir_ushr: __ srl   (left->as_register(), count->as_register(), dest->as_register()); break;
         default: ShouldNotReachHere();
       }
     } else
 #endif
       switch (code) {
         case lir_shl:  __ sll   (left->as_register(), count->as_register(), dest->as_register()); break;
         case lir_shr:  __ sra   (left->as_register(), count->as_register(), dest->as_register()); break;
         case lir_ushr: __ srl   (left->as_register(), count->as_register(), dest->as_register()); break;
         default: ShouldNotReachHere();
       }
   } else {
 #ifdef _LP64
     switch (code) {
       case lir_shl:  __ sllx  (left->as_register_lo(), count->as_register(), dest->as_register_lo()); break;
       case lir_shr:  __ srax  (left->as_register_lo(), count->as_register(), dest->as_register_lo()); break;
       case lir_ushr: __ srlx  (left->as_register_lo(), count->as_register(), dest->as_register_lo()); break;
       default: ShouldNotReachHere();
     }
 #else
     switch (code) {
       case lir_shl:  __ lshl  (left->as_register_hi(), left->as_register_lo(), count->as_register(), dest->as_register_hi(), dest->as_register_lo(), G3_scratch); break;
       case lir_shr:  __ lshr  (left->as_register_hi(), left->as_register_lo(), count->as_register(), dest->as_register_hi(), dest->as_register_lo(), G3_scratch); break;
       case lir_ushr: __ lushr (left->as_register_hi(), left->as_register_lo(), count->as_register(), dest->as_register_hi(), dest->as_register_lo(), G3_scratch); break;
       default: ShouldNotReachHere();
     }
 #endif
   }
 }
 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) {
 #ifdef _LP64
   if (left->type() == T_OBJECT) {
     count = count & 63;  // shouldn't shift by more than sizeof(intptr_t)
     Register l = left->as_register();
     Register d = dest->as_register_lo();
     switch (code) {
       case lir_shl:  __ sllx  (l, count, d); break;
       case lir_shr:  __ srax  (l, count, d); break;
       case lir_ushr: __ srlx  (l, count, d); break;
       default: ShouldNotReachHere();
     }
     return;
   }
 #endif
   if (dest->is_single_cpu()) {
     count = count & 0x1F; // Java spec
     switch (code) {
       case lir_shl:  __ sll   (left->as_register(), count, dest->as_register()); break;
       case lir_shr:  __ sra   (left->as_register(), count, dest->as_register()); break;
       case lir_ushr: __ srl   (left->as_register(), count, dest->as_register()); break;
       default: ShouldNotReachHere();
     }
   } else if (dest->is_double_cpu()) {
     count = count & 63; // Java spec
     switch (code) {
       case lir_shl:  __ sllx  (left->as_pointer_register(), count, dest->as_pointer_register()); break;
       case lir_shr:  __ srax  (left->as_pointer_register(), count, dest->as_pointer_register()); break;
       case lir_ushr: __ srlx  (left->as_pointer_register(), count, dest->as_pointer_register()); break;
       default: ShouldNotReachHere();
     }
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
   assert(op->tmp1()->as_register()  == G1 &&
          op->tmp2()->as_register()  == G3 &&
          op->tmp3()->as_register()  == G4 &&
          op->obj()->as_register()   == O0 &&
          op->klass()->as_register() == G5, "must be");
   if (op->init_check()) {
     __ ldub(op->klass()->as_register(),
           in_bytes(InstanceKlass::init_state_offset()),
           op->tmp1()->as_register());
     add_debug_info_for_null_check_here(op->stub()->info());
     __ cmp(op->tmp1()->as_register(), InstanceKlass::fully_initialized);
     __ br(Assembler::notEqual, false, Assembler::pn, *op->stub()->entry());
     __ delayed()->nop();
   }
   __ allocate_object(op->obj()->as_register(),
                      op->tmp1()->as_register(),
                      op->tmp2()->as_register(),
                      op->tmp3()->as_register(),
                      op->header_size(),
                      op->object_size(),
                      op->klass()->as_register(),
                      *op->stub()->entry());
   __ bind(*op->stub()->continuation());
   __ verify_oop(op->obj()->as_register());
 }
 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
   assert(op->tmp1()->as_register()  == G1 &&
          op->tmp2()->as_register()  == G3 &&
          op->tmp3()->as_register()  == G4 &&
          op->tmp4()->as_register()  == O1 &&
          op->klass()->as_register() == G5, "must be");
   LP64_ONLY( __ signx(op->len()->as_register()); )
   if (UseSlowPath ||
       (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) ||
       (!UseFastNewTypeArray   && (op->type() != T_OBJECT && op->type() != T_ARRAY))) {
     __ br(Assembler::always, false, Assembler::pt, *op->stub()->entry());
     __ delayed()->nop();
   } else {
     __ allocate_array(op->obj()->as_register(),
                       op->len()->as_register(),
                       op->tmp1()->as_register(),
                       op->tmp2()->as_register(),
                       op->tmp3()->as_register(),
                       arrayOopDesc::header_size(op->type()),
                       type2aelembytes(op->type()),
                       op->klass()->as_register(),
                       *op->stub()->entry());
   }
   __ bind(*op->stub()->continuation());
 }
 void LIR_Assembler::type_profile_helper(Register mdo, int mdo_offset_bias,
                                         ciMethodData *md, ciProfileData *data,
                                         Register recv, Register tmp1, Label* update_done) {
   uint i;
   for (i = 0; i < VirtualCallData::row_limit(); i++) {
     Label next_test;
     // See if the receiver is receiver[n].
     Address receiver_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)) -
                           mdo_offset_bias);
     __ ld_ptr(receiver_addr, tmp1);
     __ verify_oop(tmp1);
     __ cmp_and_brx_short(recv, tmp1, Assembler::notEqual, Assembler::pt, next_test);
     Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)) -
                       mdo_offset_bias);
     __ ld_ptr(data_addr, tmp1);
     __ add(tmp1, DataLayout::counter_increment, tmp1);
     __ st_ptr(tmp1, data_addr);
     __ ba(*update_done);
     __ delayed()->nop();
     __ bind(next_test);
   }
   // Didn't find receiver; find next empty slot and fill it in
   for (i = 0; i < VirtualCallData::row_limit(); i++) {
     Label next_test;
     Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)) -
                       mdo_offset_bias);
     __ ld_ptr(recv_addr, tmp1);
     __ br_notnull_short(tmp1, Assembler::pt, next_test);
     __ st_ptr(recv, recv_addr);
     __ set(DataLayout::counter_increment, tmp1);
     __ st_ptr(tmp1, mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)) -
               mdo_offset_bias);
     __ ba(*update_done);
     __ delayed()->nop();
     __ bind(next_test);
   }
 }
 void LIR_Assembler::setup_md_access(ciMethod* method, int bci,
                                     ciMethodData*& md, ciProfileData*& data, int& mdo_offset_bias) {
   md = method->method_data_or_null();
   assert(md != NULL, "Sanity");
   data = md->bci_to_data(bci);
   assert(data != NULL,       "need data for checkcast");
   assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
   if (!Assembler::is_simm13(md->byte_offset_of_slot(data, DataLayout::header_offset()) + data->size_in_bytes())) {
     // The offset is large so bias the mdo by the base of the slot so
     // that the ld can use simm13s to reference the slots of the data
     mdo_offset_bias = md->byte_offset_of_slot(data, DataLayout::header_offset());
   }
 }
 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();
   Register Rtmp1 = op->tmp3()->as_register();
   ciKlass* k = op->klass();
   if (obj == k_RInfo) {
     k_RInfo = klass_RInfo;
     klass_RInfo = obj;
   }
   ciMethodData* md;
   ciProfileData* data;
   int mdo_offset_bias = 0;
   if (op->should_profile()) {
     ciMethod* method = op->profiled_method();
     assert(method != NULL, "Should have method");
     setup_md_access(method, op->profiled_bci(), md, data, mdo_offset_bias);
     Label not_null;
     __ br_notnull_short(obj, Assembler::pn, not_null);
     Register mdo      = k_RInfo;
     Register data_val = Rtmp1;
     metadata2reg(md->constant_encoding(), mdo);
     if (mdo_offset_bias > 0) {
       __ set(mdo_offset_bias, data_val);
       __ add(mdo, data_val, mdo);
     }
     Address flags_addr(mdo, md->byte_offset_of_slot(data, DataLayout::flags_offset()) - mdo_offset_bias);
     __ ldub(flags_addr, data_val);
     __ or3(data_val, BitData::null_seen_byte_constant(), data_val);
     __ stb(data_val, flags_addr);
     __ ba(*obj_is_null);
     __ delayed()->nop();
     __ bind(not_null);
   } else {
     __ br_null(obj, false, Assembler::pn, *obj_is_null);
     __ delayed()->nop();
   }
   Label profile_cast_failure, profile_cast_success;
   Label *failure_target = op->should_profile() ? &profile_cast_failure : failure;
   Label *success_target = op->should_profile() ? &profile_cast_success : success;
   // patching may screw with our temporaries on sparc,
   // so let's do it before loading the class
   if (k->is_loaded()) {
     metadata2reg(k->constant_encoding(), k_RInfo);
   } else {
     klass2reg_with_patching(k_RInfo, op->info_for_patch());
   }
   assert(obj != k_RInfo, "must be different");
   // get object class
   // not a safepoint as obj null check happens earlier
   __ load_klass(obj, klass_RInfo);
   if (op->fast_check()) {
     assert_different_registers(klass_RInfo, k_RInfo);
     __ cmp(k_RInfo, klass_RInfo);
     __ brx(Assembler::notEqual, false, Assembler::pt, *failure_target);
     __ delayed()->nop();
   } else {
     bool need_slow_path = true;
     if (k->is_loaded()) {
       if ((int) k->super_check_offset() != in_bytes(Klass::secondary_super_cache_offset()))
         need_slow_path = false;
       // perform the fast part of the checking logic
       __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, noreg,
                                        (need_slow_path ? success_target : NULL),
                                        failure_target, NULL,
                                        RegisterOrConstant(k->super_check_offset()));
     } else {
       // perform the fast part of the checking logic
       __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, O7, success_target,
                                        failure_target, NULL);
     }
     if (need_slow_path) {
       // call out-of-line instance of __ check_klass_subtype_slow_path(...):
       assert(klass_RInfo == G3 && k_RInfo == G1, "incorrect call setup");
       __ call(Runtime1::entry_for(Runtime1::slow_subtype_check_id), relocInfo::runtime_call_type);
       __ delayed()->nop();
       __ cmp(G3, 0);
       __ br(Assembler::equal, false, Assembler::pn, *failure_target);
       __ delayed()->nop();
       // Fall through to success case
     }
   }
   if (op->should_profile()) {
     Register mdo  = klass_RInfo, recv = k_RInfo, tmp1 = Rtmp1;
     assert_different_registers(obj, mdo, recv, tmp1);
     __ bind(profile_cast_success);
     metadata2reg(md->constant_encoding(), mdo);
     if (mdo_offset_bias > 0) {
       __ set(mdo_offset_bias, tmp1);
       __ add(mdo, tmp1, mdo);
     }
     __ load_klass(obj, recv);
     type_profile_helper(mdo, mdo_offset_bias, md, data, recv, tmp1, success);
     // Jump over the failure case
     __ ba(*success);
     __ delayed()->nop();
     // Cast failure case
     __ bind(profile_cast_failure);
     metadata2reg(md->constant_encoding(), mdo);
     if (mdo_offset_bias > 0) {
       __ set(mdo_offset_bias, tmp1);
       __ add(mdo, tmp1, mdo);
     }
     Address data_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()) - mdo_offset_bias);
     __ ld_ptr(data_addr, tmp1);
     __ sub(tmp1, DataLayout::counter_increment, tmp1);
     __ st_ptr(tmp1, data_addr);
     __ ba(*failure);
     __ delayed()->nop();
   }
   __ ba(*success);
   __ delayed()->nop();
 }
 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();
     __ verify_oop(value);
     CodeStub* stub = op->stub();
     // check if it needs to be profiled
     ciMethodData* md;
     ciProfileData* data;
     int mdo_offset_bias = 0;
     if (op->should_profile()) {
       ciMethod* method = op->profiled_method();
       assert(method != NULL, "Should have method");
       setup_md_access(method, op->profiled_bci(), md, data, mdo_offset_bias);
     }
     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();
     if (op->should_profile()) {
       Label not_null;
       __ br_notnull_short(value, Assembler::pn, not_null);
       Register mdo      = k_RInfo;
       Register data_val = Rtmp1;
       metadata2reg(md->constant_encoding(), mdo);
       if (mdo_offset_bias > 0) {
         __ set(mdo_offset_bias, data_val);
         __ add(mdo, data_val, mdo);
       }
       Address flags_addr(mdo, md->byte_offset_of_slot(data, DataLayout::flags_offset()) - mdo_offset_bias);
       __ ldub(flags_addr, data_val);
       __ or3(data_val, BitData::null_seen_byte_constant(), data_val);
       __ stb(data_val, flags_addr);
       __ ba_short(done);
       __ bind(not_null);
     } else {
       __ br_null_short(value, Assembler::pn, done);
     }
     add_debug_info_for_null_check_here(op->info_for_exception());
     __ load_klass(array, k_RInfo);
     __ load_klass(value, klass_RInfo);
     // get instance klass
     __ ld_ptr(Address(k_RInfo, objArrayKlass::element_klass_offset()), k_RInfo);
     // perform the fast part of the checking logic
     __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, O7, success_target, failure_target, NULL);
     // call out-of-line instance of __ check_klass_subtype_slow_path(...):
     assert(klass_RInfo == G3 && k_RInfo == G1, "incorrect call setup");
     __ call(Runtime1::entry_for(Runtime1::slow_subtype_check_id), relocInfo::runtime_call_type);
     __ delayed()->nop();
     __ cmp(G3, 0);
     __ br(Assembler::equal, false, Assembler::pn, *failure_target);
     __ delayed()->nop();
     // fall through to the success case
     if (op->should_profile()) {
       Register mdo  = klass_RInfo, recv = k_RInfo, tmp1 = Rtmp1;
       assert_different_registers(value, mdo, recv, tmp1);
       __ bind(profile_cast_success);
       metadata2reg(md->constant_encoding(), mdo);
       if (mdo_offset_bias > 0) {
         __ set(mdo_offset_bias, tmp1);
         __ add(mdo, tmp1, mdo);
       }
       __ load_klass(value, recv);
       type_profile_helper(mdo, mdo_offset_bias, md, data, recv, tmp1, &done);
       __ ba_short(done);
       // Cast failure case
       __ bind(profile_cast_failure);
       metadata2reg(md->constant_encoding(), mdo);
       if (mdo_offset_bias > 0) {
         __ set(mdo_offset_bias, tmp1);
         __ add(mdo, tmp1, mdo);
       }
       Address data_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()) - mdo_offset_bias);
       __ ld_ptr(data_addr, tmp1);
       __ sub(tmp1, DataLayout::counter_increment, tmp1);
       __ st_ptr(tmp1, data_addr);
       __ ba(*stub->entry());
       __ delayed()->nop();
     }
     __ 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);
     __ mov(obj, dst);
   } 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);
     __ set(0, dst);
     __ ba_short(done);
     __ bind(success);
     __ set(1, dst);
     __ bind(done);
   } else {
     ShouldNotReachHere();
   }
 }
 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) {
   if (op->code() == lir_cas_long) {
     assert(VM_Version::supports_cx8(), "wrong machine");
     Register addr = op->addr()->as_pointer_register();
     Register cmp_value_lo = op->cmp_value()->as_register_lo();
     Register cmp_value_hi = op->cmp_value()->as_register_hi();
     Register new_value_lo = op->new_value()->as_register_lo();
     Register new_value_hi = op->new_value()->as_register_hi();
     Register t1 = op->tmp1()->as_register();
     Register t2 = op->tmp2()->as_register();
 #ifdef _LP64
     __ mov(cmp_value_lo, t1);
     __ mov(new_value_lo, t2);
     // perform the compare and swap operation
     __ casx(addr, t1, t2);
     // generate condition code - if the swap succeeded, t2 ("new value" reg) was
     // overwritten with the original value in "addr" and will be equal to t1.
     __ cmp(t1, t2);
 #else
     // move high and low halves of long values into single registers
     __ sllx(cmp_value_hi, 32, t1);         // shift high half into temp reg
     __ srl(cmp_value_lo, 0, cmp_value_lo); // clear upper 32 bits of low half
     __ or3(t1, cmp_value_lo, t1);          // t1 holds 64-bit compare value
     __ sllx(new_value_hi, 32, t2);
     __ srl(new_value_lo, 0, new_value_lo);
     __ or3(t2, new_value_lo, t2);          // t2 holds 64-bit value to swap
     // perform the compare and swap operation
     __ casx(addr, t1, t2);
     // generate condition code - if the swap succeeded, t2 ("new value" reg) was
     // overwritten with the original value in "addr" and will be equal to t1.
     // Produce icc flag for 32bit.
     __ sub(t1, t2, t2);
     __ srlx(t2, 32, t1);
     __ orcc(t2, t1, G0);
 #endif
   } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj) {
     Register addr = op->addr()->as_pointer_register();
     Register cmp_value = op->cmp_value()->as_register();
     Register new_value = op->new_value()->as_register();
     Register t1 = op->tmp1()->as_register();
     Register t2 = op->tmp2()->as_register();
     __ mov(cmp_value, t1);
     __ mov(new_value, t2);
     if (op->code() == lir_cas_obj) {
       if (UseCompressedOops) {
         __ encode_heap_oop(t1);
         __ encode_heap_oop(t2);
         __ cas(addr, t1, t2);
       } else {
         __ cas_ptr(addr, t1, t2);
       }
     } else {
       __ cas(addr, t1, t2);
     }
     __ cmp(t1, t2);
   } else {
     Unimplemented();
   }
 }
 void LIR_Assembler::set_24bit_FPU() {
   Unimplemented();
 }
 void LIR_Assembler::reset_FPU() {
   Unimplemented();
 }
 void LIR_Assembler::breakpoint() {
   __ breakpoint_trap();
 }
 void LIR_Assembler::push(LIR_Opr opr) {
   Unimplemented();
 }
 void LIR_Assembler::pop(LIR_Opr opr) {
   Unimplemented();
 }
 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst_opr) {
   Address mon_addr = frame_map()->address_for_monitor_lock(monitor_no);
   Register dst = dst_opr->as_register();
   Register reg = mon_addr.base();
   int offset = mon_addr.disp();
   // compute pointer to BasicLock
   if (mon_addr.is_simm13()) {
     __ add(reg, offset, dst);
   } else {
     __ set(offset, dst);
     __ add(dst, reg, dst);
   }
 }
 void LIR_Assembler::emit_lock(LIR_OpLock* op) {
   Register obj = op->obj_opr()->as_register();
   Register hdr = op->hdr_opr()->as_register();
   Register lock = op->lock_opr()->as_register();
   // obj may not be an oop
   if (op->code() == lir_lock) {
     MonitorEnterStub* stub = (MonitorEnterStub*)op->stub();
     if (UseFastLocking) {
       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
       if (op->info() != NULL) {
         add_debug_info_for_null_check_here(op->info());
       }
       __ lock_object(hdr, obj, lock, op->scratch_opr()->as_register(), *op->stub()->entry());
     } else {
       // always do slow locking
       // note: the slow locking code could be inlined here, however if we use
       //       slow locking, speed doesn't matter anyway and this solution is
       //       simpler and requires less duplicated code - additionally, the
       //       slow locking code is the same in either case which simplifies
       //       debugging
       __ br(Assembler::always, false, Assembler::pt, *op->stub()->entry());
       __ delayed()->nop();
     }
   } else {
     assert (op->code() == lir_unlock, "Invalid code, expected lir_unlock");
     if (UseFastLocking) {
       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 {
       // 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
       __ br(Assembler::always, false, Assembler::pt, *op->stub()->entry());
       __ delayed()->nop();
     }
   }
   __ bind(*op->stub()->continuation());
 }
 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
   ciMethod* method = op->profiled_method();
   int bci          = op->profiled_bci();
   ciMethod* callee = op->profiled_callee();
   // 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();
 #ifdef _LP64
   assert(op->tmp1()->is_double_cpu(), "tmp1 must be allocated");
   Register tmp1 = op->tmp1()->as_register_lo();
 #else
   assert(op->tmp1()->is_single_cpu(), "tmp1 must be allocated");
   Register tmp1 = op->tmp1()->as_register();
 #endif
   metadata2reg(md->constant_encoding(), mdo);
   int mdo_offset_bias = 0;
   if (!Assembler::is_simm13(md->byte_offset_of_slot(data, CounterData::count_offset()) +
                             data->size_in_bytes())) {
     // The offset is large so bias the mdo by the base of the slot so
     // that the ld can use simm13s to reference the slots of the data
     mdo_offset_bias = md->byte_offset_of_slot(data, CounterData::count_offset());
     __ set(mdo_offset_bias, O7);
     __ add(mdo, O7, mdo);
   }
   Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()) - mdo_offset_bias);
   Bytecodes::Code bc = method->java_code_at_bci(bci);
   const bool callee_is_static = callee->is_loaded() && callee->is_static();
   // Perform additional virtual call profiling for invokevirtual and
   // invokeinterface bytecodes
   if ((bc == Bytecodes::_invokevirtual || bc == Bytecodes::_invokeinterface) &&
       !callee_is_static &&  // required for optimized MH invokes
       C1ProfileVirtualCalls) {
     assert(op->recv()->is_single_cpu(), "recv must be allocated");
     Register recv = op->recv()->as_register();
     assert_different_registers(mdo, tmp1, 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 MethodData* 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)) -
                             mdo_offset_bias);
           __ ld_ptr(data_addr, tmp1);
           __ add(tmp1, DataLayout::counter_increment, tmp1);
           __ st_ptr(tmp1, data_addr);
           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)) -
                             mdo_offset_bias);
           metadata2reg(known_klass->constant_encoding(), tmp1);
           __ st_ptr(tmp1, recv_addr);
           Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)) -
                             mdo_offset_bias);
           __ ld_ptr(data_addr, tmp1);
           __ add(tmp1, DataLayout::counter_increment, tmp1);
           __ st_ptr(tmp1, data_addr);
           return;
         }
       }
     } else {
       __ load_klass(recv, recv);
       Label update_done;
       type_profile_helper(mdo, mdo_offset_bias, md, data, recv, tmp1, &update_done);
       // Receiver did not match any saved receiver and there is no empty row for it.
       // Increment total counter to indicate polymorphic case.
       __ ld_ptr(counter_addr, tmp1);
       __ add(tmp1, DataLayout::counter_increment, tmp1);
       __ st_ptr(tmp1, counter_addr);
       __ bind(update_done);
     }
   } else {
     // Static call
     __ ld_ptr(counter_addr, tmp1);
     __ add(tmp1, DataLayout::counter_increment, tmp1);
     __ st_ptr(tmp1, counter_addr);
   }
 }
 void LIR_Assembler::align_backward_branch_target() {
   __ align(OptoLoopAlignment);
 }
 void LIR_Assembler::emit_delay(LIR_OpDelay* op) {
   // make sure we are expecting a delay
   // this has the side effect of clearing the delay state
   // so we can use _masm instead of _masm->delayed() to do the
   // code generation.
   __ delayed();
   // make sure we only emit one instruction
   int offset = code_offset();
   op->delay_op()->emit_code(this);
 #ifdef ASSERT
   if (code_offset() - offset != NativeInstruction::nop_instruction_size) {
     op->delay_op()->print();
   }
   assert(code_offset() - offset == NativeInstruction::nop_instruction_size,
          "only one instruction can go in a delay slot");
 #endif
   // we may also be emitting the call info for the instruction
   // which we are the delay slot of.
   CodeEmitInfo* call_info = op->call_info();
   if (call_info) {
     add_call_info(code_offset(), call_info);
   }
   if (VerifyStackAtCalls) {
     _masm->sub(FP, SP, O7);
     _masm->cmp(O7, initial_frame_size_in_bytes());
     _masm->trap(Assembler::notEqual, Assembler::ptr_cc, G0, ST_RESERVED_FOR_USER_0+2 );
   }
 }
 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) {
   assert(left->is_register(), "can only handle registers");
   if (left->is_single_cpu()) {
     __ neg(left->as_register(), dest->as_register());
   } else if (left->is_single_fpu()) {
     __ fneg(FloatRegisterImpl::S, left->as_float_reg(), dest->as_float_reg());
   } else if (left->is_double_fpu()) {
     __ fneg(FloatRegisterImpl::D, left->as_double_reg(), dest->as_double_reg());
   } else {
     assert (left->is_double_cpu(), "Must be a long");
     Register Rlow = left->as_register_lo();
     Register Rhi = left->as_register_hi();
 #ifdef _LP64
     __ sub(G0, Rlow, dest->as_register_lo());
 #else
     __ subcc(G0, Rlow, dest->as_register_lo());
     __ subc (G0, Rhi,  dest->as_register_hi());
 #endif
   }
 }
 void LIR_Assembler::fxch(int i) {
   Unimplemented();
 }
 void LIR_Assembler::fld(int i) {
   Unimplemented();
 }
 void LIR_Assembler::ffree(int i) {
   Unimplemented();
 }
 void LIR_Assembler::rt_call(LIR_Opr result, address dest,
                             const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) {
   // if tmp is invalid, then the function being called doesn't destroy the thread
   if (tmp->is_valid()) {
     __ save_thread(tmp->as_register());
   }
   __ call(dest, relocInfo::runtime_call_type);
   __ delayed()->nop();
   if (info != NULL) {
     add_call_info_here(info);
   }
   if (tmp->is_valid()) {
     __ restore_thread(tmp->as_register());
   }
 #ifdef ASSERT
   __ verify_thread();
 #endif // ASSERT
 }
 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) {
 #ifdef _LP64
   ShouldNotReachHere();
 #endif
   NEEDS_CLEANUP;
   if (type == T_LONG) {
     LIR_Address* mem_addr = dest->is_address() ? dest->as_address_ptr() : src->as_address_ptr();
     // (extended to allow indexed as well as constant displaced for JSR-166)
     Register idx = noreg; // contains either constant offset or index
     int disp = mem_addr->disp();
     if (mem_addr->index() == LIR_OprFact::illegalOpr) {
       if (!Assembler::is_simm13(disp)) {
         idx = O7;
         __ set(disp, idx);
       }
     } else {
       assert(disp == 0, "not both indexed and disp");
       idx = mem_addr->index()->as_register();
     }
     int null_check_offset = -1;
     Register base = mem_addr->base()->as_register();
     if (src->is_register() && dest->is_address()) {
       // G4 is high half, G5 is low half
       if (VM_Version::v9_instructions_work()) {
         // clear the top bits of G5, and scale up G4
         __ srl (src->as_register_lo(),  0, G5);
         __ sllx(src->as_register_hi(), 32, G4);
         // combine the two halves into the 64 bits of G4
         __ or3(G4, G5, G4);
         null_check_offset = __ offset();
         if (idx == noreg) {
           __ stx(G4, base, disp);
         } else {
           __ stx(G4, base, idx);
         }
       } else {
         __ mov (src->as_register_hi(), G4);
         __ mov (src->as_register_lo(), G5);
         null_check_offset = __ offset();
         if (idx == noreg) {
           __ std(G4, base, disp);
         } else {
           __ std(G4, base, idx);
         }
       }
     } else if (src->is_address() && dest->is_register()) {
       null_check_offset = __ offset();
       if (VM_Version::v9_instructions_work()) {
         if (idx == noreg) {
           __ ldx(base, disp, G5);
         } else {
           __ ldx(base, idx, G5);
         }
         __ srax(G5, 32, dest->as_register_hi()); // fetch the high half into hi
         __ mov (G5, dest->as_register_lo());     // copy low half into lo
       } else {
         if (idx == noreg) {
           __ ldd(base, disp, G4);
         } else {
           __ ldd(base, idx, G4);
         }
         // G4 is high half, G5 is low half
         __ mov (G4, dest->as_register_hi());
         __ mov (G5, dest->as_register_lo());
       }
     } else {
       Unimplemented();
     }
     if (info != NULL) {
       add_debug_info_for_null_check(null_check_offset, info);
     }
   } else {
     // use normal move for all other volatiles since they don't need
     // special handling to remain atomic.
     move_op(src, dest, type, lir_patch_none, info, false, false, false);
   }
 }
 void LIR_Assembler::membar() {
   // only StoreLoad membars are ever explicitly needed on sparcs in TSO mode
   __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad) );
 }
 void LIR_Assembler::membar_acquire() {
   // no-op on TSO
 }
 void LIR_Assembler::membar_release() {
   // no-op on TSO
 }
 void LIR_Assembler::membar_loadload() {
   // no-op
   //__ membar(Assembler::Membar_mask_bits(Assembler::loadload));
 }
 void LIR_Assembler::membar_storestore() {
   // no-op
   //__ membar(Assembler::Membar_mask_bits(Assembler::storestore));
 }
 void LIR_Assembler::membar_loadstore() {
   // no-op
   //__ membar(Assembler::Membar_mask_bits(Assembler::loadstore));
 }
 void LIR_Assembler::membar_storeload() {
   __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
 }
 // Pack two sequential registers containing 32 bit values
 // into a single 64 bit register.
 // src and src->successor() are packed into dst
 // src and dst may be the same register.
 // Note: src is destroyed
 void LIR_Assembler::pack64(LIR_Opr src, LIR_Opr dst) {
   Register rs = src->as_register();
   Register rd = dst->as_register_lo();
   __ sllx(rs, 32, rs);
   __ srl(rs->successor(), 0, rs->successor());
   __ or3(rs, rs->successor(), rd);
 }
 // Unpack a 64 bit value in a register into
 // two sequential registers.
 // src is unpacked into dst and dst->successor()
 void LIR_Assembler::unpack64(LIR_Opr src, LIR_Opr dst) {
   Register rs = src->as_register_lo();
   Register rd = dst->as_register_hi();
   assert_different_registers(rs, rd, rd->successor());
   __ srlx(rs, 32, rd);
   __ srl (rs,  0, rd->successor());
 }
 void LIR_Assembler::leal(LIR_Opr addr_opr, LIR_Opr dest) {
   LIR_Address* addr = addr_opr->as_address_ptr();
   assert(addr->index()->is_illegal() && addr->scale() == LIR_Address::times_1 && Assembler::is_simm13(addr->disp()), "can't handle complex addresses yet");
   __ add(addr->base()->as_pointer_register(), addr->disp(), dest->as_pointer_register());
 }
 void LIR_Assembler::get_thread(LIR_Opr result_reg) {
   assert(result_reg->is_register(), "check");
   __ mov(G2_thread, result_reg->as_register());
 }
 void LIR_Assembler::peephole(LIR_List* lir) {
   LIR_OpList* inst = lir->instructions_list();
   for (int i = 0; i < inst->length(); i++) {
     LIR_Op* op = inst->at(i);
     switch (op->code()) {
       case lir_cond_float_branch:
       case lir_branch: {
         LIR_OpBranch* branch = op->as_OpBranch();
         assert(branch->info() == NULL, "shouldn't be state on branches anymore");
         LIR_Op* delay_op = NULL;
         // we'd like to be able to pull following instructions into
         // this slot but we don't know enough to do it safely yet so
         // only optimize block to block control flow.
         if (LIRFillDelaySlots && branch->block()) {
           LIR_Op* prev = inst->at(i - 1);
           if (prev && LIR_Assembler::is_single_instruction(prev) && prev->info() == NULL) {
             // swap previous instruction into delay slot
             inst->at_put(i - 1, op);
             inst->at_put(i, new LIR_OpDelay(prev, op->info()));
 #ifndef PRODUCT
             if (LIRTracePeephole) {
               tty->print_cr("delayed");
               inst->at(i - 1)->print();
               inst->at(i)->print();
               tty->cr();
             }
 #endif
             continue;
           }
         }
         if (!delay_op) {
           delay_op = new LIR_OpDelay(new LIR_Op0(lir_nop), NULL);
         }
         inst->insert_before(i + 1, delay_op);
         break;
       }
       case lir_static_call:
       case lir_virtual_call:
       case lir_icvirtual_call:
       case lir_optvirtual_call:
       case lir_dynamic_call: {
         LIR_Op* prev = inst->at(i - 1);
         if (LIRFillDelaySlots && prev && prev->code() == lir_move && prev->info() == NULL &&
             (op->code() != lir_virtual_call ||
              !prev->result_opr()->is_single_cpu() ||
              prev->result_opr()->as_register() != O0) &&
             LIR_Assembler::is_single_instruction(prev)) {
           // Only moves without info can be put into the delay slot.
           // Also don't allow the setup of the receiver in the delay
           // slot for vtable calls.
           inst->at_put(i - 1, op);
           inst->at_put(i, new LIR_OpDelay(prev, op->info()));
 #ifndef PRODUCT
           if (LIRTracePeephole) {
             tty->print_cr("delayed");
             inst->at(i - 1)->print();
             inst->at(i)->print();
             tty->cr();
           }
 #endif
         } else {
           LIR_Op* delay_op = new LIR_OpDelay(new LIR_Op0(lir_nop), op->as_OpJavaCall()->info());
           inst->insert_before(i + 1, delay_op);
           i++;
         }
 #if defined(TIERED) && !defined(_LP64)
         // fixup the return value from G1 to O0/O1 for long returns.
         // It's done here instead of in LIRGenerator because there's
         // such a mismatch between the single reg and double reg
         // calling convention.
         LIR_OpJavaCall* callop = op->as_OpJavaCall();
         if (callop->result_opr() == FrameMap::out_long_opr) {
           LIR_OpJavaCall* call;
           LIR_OprList* arguments = new LIR_OprList(callop->arguments()->length());
           for (int a = 0; a < arguments->length(); a++) {
             arguments[a] = callop->arguments()[a];
           }
           if (op->code() == lir_virtual_call) {
             call = new LIR_OpJavaCall(op->code(), callop->method(), callop->receiver(), FrameMap::g1_long_single_opr,
                                       callop->vtable_offset(), arguments, callop->info());
           } else {
             call = new LIR_OpJavaCall(op->code(), callop->method(), callop->receiver(), FrameMap::g1_long_single_opr,
                                       callop->addr(), arguments, callop->info());
           }
           inst->at_put(i - 1, call);
           inst->insert_before(i + 1, new LIR_Op1(lir_unpack64, FrameMap::g1_long_single_opr, callop->result_opr(),
                                                  T_LONG, lir_patch_none, NULL));
         }
 #endif
         break;
       }
     }
   }
 }
 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp) {
   LIR_Address* addr = src->as_address_ptr();
   assert(data == dest, "swap uses only 2 operands");
   assert (code == lir_xchg, "no xadd on sparc");
   if (data->type() == T_INT) {
     __ swap(as_Address(addr), data->as_register());
   } else if (data->is_oop()) {
     Register obj = data->as_register();
     Register narrow = tmp->as_register();
 #ifdef _LP64
     assert(UseCompressedOops, "swap is 32bit only");
     __ encode_heap_oop(obj, narrow);
     __ swap(as_Address(addr), narrow);
     __ decode_heap_oop(narrow, obj);
 #else
     __ swap(as_Address(addr), obj);
 #endif
   } else {
     ShouldNotReachHere();
   }
 }
 #undef __

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp@7eca5de9e0b6 (annotated)

src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp