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

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  * version 2 for more details (a copy is included in the LICENSE file that

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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");

 	//addptr(rsp, wordSize * nof_words);

 	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