224 
 225   // Instruction boundaries (required when emitting relocatable values).
 226   class InstructionMark: public StackObj {
 227    private:
 228     AbstractAssembler* _assm;
 229 
 230    public:
 231     InstructionMark(AbstractAssembler* assm) : _assm(assm) {
 232       assert(assm->inst_mark() == NULL, "overlapping instructions");
 233       _assm->set_inst_mark();
 234     }
 235     ~InstructionMark() {
 236       _assm->clear_inst_mark();
 237     }
 238   };
 239   friend class InstructionMark;
 240   #ifdef ASSERT
 241   // Make it return true on platforms which need to verify
 242   // instruction boundaries for some operations.
 243   inline static bool pd_check_instruction_mark();






















 244   #endif
 245 
 246   // Label functions
 247   void print(Label& L);
 248 
 249  public:
 250 
 251   // Creation
 252   AbstractAssembler(CodeBuffer* code);
 253 
 254   // save end pointer back to code buf.
 255   void sync();
 256 
 257   // ensure buf contains all code (call this before using/copying the code)
 258   void flush();
 259 
 260   // min and max values for signed immediate ranges
 261   static int min_simm(int nbits) { return -(intptr_t(1) << (nbits - 1))    ; }
 262   static int max_simm(int nbits) { return  (intptr_t(1) << (nbits - 1)) - 1; }
 263 

 224 
 225   // Instruction boundaries (required when emitting relocatable values).
 226   class InstructionMark: public StackObj {
 227    private:
 228     AbstractAssembler* _assm;
 229 
 230    public:
 231     InstructionMark(AbstractAssembler* assm) : _assm(assm) {
 232       assert(assm->inst_mark() == NULL, "overlapping instructions");
 233       _assm->set_inst_mark();
 234     }
 235     ~InstructionMark() {
 236       _assm->clear_inst_mark();
 237     }
 238   };
 239   friend class InstructionMark;
 240   #ifdef ASSERT
 241   // Make it return true on platforms which need to verify
 242   // instruction boundaries for some operations.
 243   inline static bool pd_check_instruction_mark();
 244 
 245   // Add delta to short branch distance to verify that it still fit into imm8.
 246   int _short_branch_delta;
 247 
 248   int  short_branch_delta() const { return _short_branch_delta; }
 249   void set_short_branch_delta()   { _short_branch_delta = 32; }
 250   void clear_short_branch_delta() { _short_branch_delta = 0; }
 251 
 252   class ShortBranchVerifier: public StackObj {
 253    private:
 254     AbstractAssembler* _assm;
 255 
 256    public:
 257     ShortBranchVerifier(AbstractAssembler* assm) : _assm(assm) {
 258       assert(assm->short_branch_delta() == 0, "overlapping instructions");
 259       _assm->set_short_branch_delta();
 260     }
 261     ~ShortBranchVerifier() {
 262       _assm->clear_short_branch_delta();
 263     }
 264   };
 265   friend class ShortBranchVerifier;
 266   #endif
 267 
 268   // Label functions
 269   void print(Label& L);
 270 
 271  public:
 272 
 273   // Creation
 274   AbstractAssembler(CodeBuffer* code);
 275 
 276   // save end pointer back to code buf.
 277   void sync();
 278 
 279   // ensure buf contains all code (call this before using/copying the code)
 280   void flush();
 281 
 282   // min and max values for signed immediate ranges
 283   static int min_simm(int nbits) { return -(intptr_t(1) << (nbits - 1))    ; }
 284   static int max_simm(int nbits) { return  (intptr_t(1) << (nbits - 1)) - 1; }
 285