c1_MacroAssembler_aarch32.hpp

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// This file is a derivative work resulting from (and including) modifications
// made by Azul Systems, Inc.  The dates of such changes are 2013-2016.
// Copyright 2013-2016 Azul Systems, Inc.  All Rights Reserved.
//
// Please contact Azul Systems, 385 Moffett Park Drive, Suite 115, Sunnyvale,
// CA 94089 USA or visit www.azul.com if you need additional information or
// have any questions.

#ifndef CPU_AARCH32_VM_C1_MACROASSEMBLER_AARCH32_HPP
#define CPU_AARCH32_VM_C1_MACROASSEMBLER_AARCH32_HPP

// C1_MacroAssembler contains high-level macros for C1

 private:
  int _rsp_offset;    // track rsp changes
  // initialization
  void pd_init() { _rsp_offset = 0; }

void zero_memory(Register addr, Register len, Register t1);

 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);

  void float_cmp(bool is_float, int unordered_result,
                 FloatRegister f0, FloatRegister f1,
                 Register result);

  // locking
  // hdr     : must be r0, 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 r0 & 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        : 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        : 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 t, Register t2, int header_size, int f, Register klass, Label& slow_case);

  int  rsp_offset() const { return _rsp_offset; }
  void set_rsp_offset(int n) { _rsp_offset = n; }

  void invalidate_registers(bool inv_r0, bool inv_r2, bool inv_r3) PRODUCT_RETURN;

  void patchable_load(Register reg, address addr);

#endif // CPU_AARCH32_VM_C1_MACROASSEMBLER_AARCH32_HPP