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 /*

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  * Copyright (c) 2015, 2016, Loongson Technology. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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  * 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

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 #ifndef CPU_MIPS_VM_C1_MACROASSEMBLER_MIPS_HPP

 #define CPU_MIPS_VM_C1_MACROASSEMBLER_MIPS_HPP

 // C1_MacroAssembler contains high-level macros for C1

  private:

   int _sp_offset;    // track sp changes

   // initialization

   void pd_init() { _sp_offset = 0; }

  public:

   void try_allocate(

     Register obj,                      // result: pointer to object after successful allocation

     Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise

     int      con_size_in_bytes,        // object size in bytes if   known at compile time

     Register t1,                       // temp register

     Register t2,                       // temp register

     Label&   slow_case                 // continuation point if fast allocation fails

   );

   void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2);

   void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1);

   // locking

   // hdr     : must be rax, contents destroyed

   // obj     : must point to the object to lock, contents preserved

   // disp_hdr: must point to the displaced header location, contents preserved

   // scratch : scratch register, contents destroyed

   // returns code offset at which to add null check debug information

   int lock_object  (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case);

   // unlocking

   // hdr     : contents destroyed

   // obj     : must point to the object to lock, contents preserved

   // disp_hdr: must be eax & must point to the displaced header location, contents destroyed

   void unlock_object(Register swap, Register obj, Register lock, Label& slow_case);

   void initialize_object(

     Register obj,                      // result: pointer to object after successful allocation

     Register klass,                    // object klass

     Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise

     int      con_size_in_bytes,        // object size in bytes if   known at compile time

     Register t1,                       // temp register

     Register t2                        // temp register

   );

   // allocation of fixed-size objects

   // (can also be used to allocate fixed-size arrays, by setting

   // hdr_size correctly and storing the array length afterwards)

   // obj        : must be rax, will contain pointer to allocated object

   // t1, t2     : scratch registers - contents destroyed

   // header_size: size of object header in words

   // object_size: total size of object in words

   // slow_case  : exit to slow case implementation if fast allocation fails

   void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case);

   enum {

     max_array_allocation_length = 0x00FFFFFF

   };

   // allocation of arrays

   // obj        : must be rax, will contain pointer to allocated object

   // len        : array length in number of elements

   // t          : scratch register - contents destroyed

   // header_size: size of object header in words

   // f          : element scale factor

   // slow_case  : exit to slow case implementation if fast allocation fails

   void allocate_array(Register obj, Register len, Register t1, Register t2, Register t3, int header_size, int scale, Register klass, Label& slow_case);

   int  sp_offset() const { return _sp_offset; }

   void set_sp_offset(int n) { _sp_offset = n; }

   // Note: NEVER push values directly, but only through following push_xxx functions;

   //       This helps us to track the rsp changes compared to the entry rsp (->_sp_offset)

   void push_jint (jint i)     { _sp_offset++; move(AT, (int)i); push(AT); }

 #ifdef _LP64

   void push_oop  (jobject o)  { ShouldNotReachHere(); _sp_offset++; li(AT, (long)o); push(AT);}

 #else

   void push_oop  (jobject o)  { ShouldNotReachHere(); _sp_offset++; move(AT, (int)o); push(AT);}

 #endif

   // Seems to always be in wordSize

   void push_addr (Address a)  { _sp_offset++; addi(AT, a.base(), a.disp()); push(AT);}

   void push_reg  (Register r) { _sp_offset++; push(r); }

   void pop_reg   (Register r) { _sp_offset--; pop(r); assert(_sp_offset >= 0, "stack offset underflow"); }

   void super_pop(Register r) {MacroAssembler::pop(r);}

   void dec_stack (int nof_words) {

     _sp_offset -= nof_words;

     assert(_sp_offset >= 0, "stack offset underflow");

     addi(SP, SP, wordSize * nof_words);

   }

   void dec_stack_after_call (int nof_words) {

     _sp_offset -= nof_words;

     assert(_sp_offset >= 0, "stack offset underflow");

   }

   void invalidate_registers(bool inv_rax, bool inv_rbx, bool inv_rcx, bool inv_rdx, bool inv_rsi, bool inv_rdi) PRODUCT_RETURN;

 #endif // CPU_MIPS_VM_C1_MACROASSEMBLER_MIPS_HPP