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 /*

  * Copyright (c) 2000, 2010, 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.

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  */

 #ifndef SHARE_VM_C1_C1_FRAMEMAP_HPP

 #define SHARE_VM_C1_C1_FRAMEMAP_HPP

 #include "asm/assembler.hpp"

 #include "c1/c1_Defs.hpp"

 #include "c1/c1_LIR.hpp"

 #include "code/vmreg.hpp"

 #include "memory/allocation.hpp"

 #include "runtime/frame.hpp"

 #include "runtime/synchronizer.hpp"

 #include "utilities/globalDefinitions.hpp"

 class ciMethod;

 class CallingConvention;

 class BasicTypeArray;

 class BasicTypeList;

 //--------------------------------------------------------

 //               FrameMap

 //--------------------------------------------------------

 //  This class is responsible of mapping items (locals, monitors, spill

 //  slots and registers to their frame location

 //

 //  The monitors are specified by a consecutive index, although each monitor entry

 //  occupies two words. The monitor_index is 0.._num_monitors

 //  The spill index is similar to local index; it is in range 0..(open)

 //

 //  The CPU registers are mapped using a fixed table; register with number 0

 //  is the most used one.

 //   stack grow direction -->                                        SP

 //  +----------+---+----------+-------+------------------------+-----+

 //  |arguments | x | monitors | spill | reserved argument area | ABI |

 //  +----------+---+----------+-------+------------------------+-----+

 //

 //  x =  ABI area (SPARC) or  return adress and link (i486)

 //  ABI  = ABI area (SPARC) or nothing (i486)

 class LIR_OprDesc;

 typedef LIR_OprDesc* LIR_Opr;

 class FrameMap : public CompilationResourceObj {

  public:

   enum {

     nof_cpu_regs = pd_nof_cpu_regs_frame_map,

     nof_fpu_regs = pd_nof_fpu_regs_frame_map,

     nof_cpu_regs_reg_alloc = pd_nof_cpu_regs_reg_alloc,

     nof_fpu_regs_reg_alloc = pd_nof_fpu_regs_reg_alloc,

     nof_caller_save_cpu_regs = pd_nof_caller_save_cpu_regs_frame_map,

     nof_caller_save_fpu_regs = pd_nof_caller_save_fpu_regs_frame_map,

     spill_slot_size_in_bytes = 4

   };

 #ifdef TARGET_ARCH_x86

 # include "c1_FrameMap_x86.hpp"

 #endif

 #ifdef TARGET_ARCH_sparc

 # include "c1_FrameMap_sparc.hpp"

 #endif

   friend class LIR_OprDesc;

  private:

   static bool         _init_done;

   static Register     _cpu_rnr2reg [nof_cpu_regs];

   static int          _cpu_reg2rnr [nof_cpu_regs];

   static LIR_Opr      _caller_save_cpu_regs [nof_caller_save_cpu_regs];

   static LIR_Opr      _caller_save_fpu_regs [nof_caller_save_fpu_regs];

   int                 _framesize;

   int                 _argcount;

   int                 _num_monitors;

   int                 _num_spills;

   int                 _reserved_argument_area_size;

   int                 _oop_map_arg_count;

   CallingConvention*  _incoming_arguments;

   intArray*           _argument_locations;

   void check_spill_index   (int spill_index)   const { assert(spill_index   >= 0, "bad index"); }

   void check_monitor_index (int monitor_index) const { assert(monitor_index >= 0 &&

                                                               monitor_index < _num_monitors, "bad index"); }

   static Register cpu_rnr2reg (int rnr) {

     assert(_init_done, "tables not initialized");

     debug_only(cpu_range_check(rnr);)

     return _cpu_rnr2reg[rnr];

   }

   static int cpu_reg2rnr (Register reg) {

     assert(_init_done, "tables not initialized");

     debug_only(cpu_range_check(reg->encoding());)

     return _cpu_reg2rnr[reg->encoding()];

   }

   static void map_register(int rnr, Register reg) {

     debug_only(cpu_range_check(rnr);)

     debug_only(cpu_range_check(reg->encoding());)

     _cpu_rnr2reg[rnr] = reg;

     _cpu_reg2rnr[reg->encoding()] = rnr;

   }

   void update_reserved_argument_area_size (int size) {

     assert(size >= 0, "check");

     _reserved_argument_area_size = MAX2(_reserved_argument_area_size, size);

   }

  protected:

 #ifndef PRODUCT

   static void cpu_range_check (int rnr)          { assert(0 <= rnr && rnr < nof_cpu_regs, "cpu register number is too big"); }

   static void fpu_range_check (int rnr)          { assert(0 <= rnr && rnr < nof_fpu_regs, "fpu register number is too big"); }

 #endif

   ByteSize sp_offset_for_monitor_base(const int idx) const;

   Address make_new_address(ByteSize sp_offset) const;

   ByteSize sp_offset_for_slot(const int idx) const;

   ByteSize sp_offset_for_double_slot(const int idx) const;

   ByteSize sp_offset_for_spill(const int idx) const;

   ByteSize sp_offset_for_monitor_lock(int monitor_index) const;

   ByteSize sp_offset_for_monitor_object(int monitor_index) const;

   VMReg sp_offset2vmreg(ByteSize offset) const;

   // platform dependent hook used to check that frame is properly

   // addressable on the platform.  Used by sparc to verify that all

   // stack addresses are expressable in a simm13.

   bool validate_frame();

   static LIR_Opr map_to_opr(BasicType type, VMRegPair* reg, bool incoming);

  public:

   // Opr representing the stack_pointer on this platform

   static LIR_Opr stack_pointer();

   // JSR 292

   static LIR_Opr method_handle_invoke_SP_save_opr();

   static BasicTypeArray*     signature_type_array_for(const ciMethod* method);

   // for outgoing calls, these also update the reserved area to

   // include space for arguments and any ABI area.

   CallingConvention* c_calling_convention (const BasicTypeArray* signature);

   CallingConvention* java_calling_convention (const BasicTypeArray* signature, bool outgoing);

   // deopt support

   ByteSize sp_offset_for_orig_pc() { return sp_offset_for_monitor_base(_num_monitors); }

   static LIR_Opr as_opr(Register r) {

     return LIR_OprFact::single_cpu(cpu_reg2rnr(r));

   }

   static LIR_Opr as_oop_opr(Register r) {

     return LIR_OprFact::single_cpu_oop(cpu_reg2rnr(r));

   }

   FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size);

   bool finalize_frame(int nof_slots);

   int   reserved_argument_area_size () const     { return _reserved_argument_area_size; }

   int   framesize                   () const     { assert(_framesize != -1, "hasn't been calculated"); return _framesize; }

   ByteSize framesize_in_bytes       () const     { return in_ByteSize(framesize() * 4); }

   int   num_monitors                () const     { return _num_monitors; }

   int   num_spills                  () const     { assert(_num_spills >= 0, "not set"); return _num_spills; }

   int   argcount              () const     { assert(_argcount >= 0, "not set"); return _argcount; }

   int oop_map_arg_count() const { return _oop_map_arg_count; }

   CallingConvention* incoming_arguments() const  { return _incoming_arguments; }

   // convenience routines

   Address address_for_slot(int index, int sp_adjust = 0) const {

     return make_new_address(sp_offset_for_slot(index) + in_ByteSize(sp_adjust));

   }

   Address address_for_double_slot(int index, int sp_adjust = 0) const {

     return make_new_address(sp_offset_for_double_slot(index) + in_ByteSize(sp_adjust));

   }

   Address address_for_monitor_lock(int monitor_index) const {

     return make_new_address(sp_offset_for_monitor_lock(monitor_index));

   }

   Address address_for_monitor_object(int monitor_index) const {

     return make_new_address(sp_offset_for_monitor_object(monitor_index));

   }

   void print_frame_layout() const;

   // Creates Location describing desired slot and returns it via pointer

   // to Location object. Returns true if the stack frame offset was legal

   // (as defined by Location::legal_offset_in_bytes()), false otherwise.

   // Do not use the returned location if this returns false.

   bool location_for_sp_offset(ByteSize byte_offset_from_sp,

                               Location::Type loc_type, Location* loc) const;

   bool location_for_monitor_lock  (int monitor_index, Location* loc) const {

     return location_for_sp_offset(sp_offset_for_monitor_lock(monitor_index), Location::normal, loc);

   }

   bool location_for_monitor_object(int monitor_index, Location* loc) const {

     return location_for_sp_offset(sp_offset_for_monitor_object(monitor_index), Location::oop, loc);

   }

   bool locations_for_slot  (int index, Location::Type loc_type,

                             Location* loc, Location* second = NULL) const;

   VMReg slot_regname(int index) const {

     return sp_offset2vmreg(sp_offset_for_slot(index));

   }

   VMReg monitor_object_regname(int monitor_index) const {

     return sp_offset2vmreg(sp_offset_for_monitor_object(monitor_index));

   }

   VMReg regname(LIR_Opr opr) const;

   static LIR_Opr caller_save_cpu_reg_at(int i) {

     assert(i >= 0 && i < nof_caller_save_cpu_regs, "out of bounds");

     return _caller_save_cpu_regs[i];

   }

   static LIR_Opr caller_save_fpu_reg_at(int i) {

     assert(i >= 0 && i < nof_caller_save_fpu_regs, "out of bounds");

     return _caller_save_fpu_regs[i];

   }

   static void initialize();

 };

 //               CallingConvention

 //--------------------------------------------------------

 class CallingConvention: public ResourceObj {

  private:

   LIR_OprList* _args;

   int          _reserved_stack_slots;

  public:

   CallingConvention (LIR_OprList* args, int reserved_stack_slots)

     : _args(args)

     , _reserved_stack_slots(reserved_stack_slots)  {}

   LIR_OprList* args()       { return _args; }

   LIR_Opr at(int i) const   { return _args->at(i); }

   int length() const        { return _args->length(); }

   // Indicates number of real frame slots used by arguments passed on stack.

   int reserved_stack_slots() const            { return _reserved_stack_slots; }

 #ifndef PRODUCT

   void print () const {

     for (int i = 0; i < length(); i++) {

       at(i)->print();

     }

   }

 #endif // PRODUCT

 };

 #endif // SHARE_VM_C1_C1_FRAMEMAP_HPP