c1_MacroAssembler_x86.hpp revision 1472:c18cbe5936b8 
155714Skris/*
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355714Skris * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
455714Skris *
555714Skris * This code is free software; you can redistribute it and/or modify it
655714Skris * under the terms of the GNU General Public License version 2 only, as
755714Skris * published by the Free Software Foundation.
855714Skris *
955714Skris * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
24
25// C1_MacroAssembler contains high-level macros for C1
26
27 private:
28  int _rsp_offset;    // track rsp changes
29  // initialization
30  void pd_init() { _rsp_offset = 0; }
31
32 public:
33  void try_allocate(
34    Register obj,                      // result: pointer to object after successful allocation
35    Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise
36    int      con_size_in_bytes,        // object size in bytes if   known at compile time
37    Register t1,                       // temp register
38    Register t2,                       // temp register
39    Label&   slow_case                 // continuation point if fast allocation fails
40  );
41
42  void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2);
43  void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1);
44
45  // locking
46  // hdr     : must be rax, contents destroyed
47  // obj     : must point to the object to lock, contents preserved
48  // disp_hdr: must point to the displaced header location, contents preserved
49  // scratch : scratch register, contents destroyed
50  // returns code offset at which to add null check debug information
51  int lock_object  (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case);
52
53  // unlocking
54  // hdr     : contents destroyed
55  // obj     : must point to the object to lock, contents preserved
56  // disp_hdr: must be eax & must point to the displaced header location, contents destroyed
57  void unlock_object(Register swap, Register obj, Register lock, Label& slow_case);
58
59  void initialize_object(
60    Register obj,                      // result: pointer to object after successful allocation
61    Register klass,                    // object klass
62    Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise
63    int      con_size_in_bytes,        // object size in bytes if   known at compile time
64    Register t1,                       // temp register
65    Register t2                        // temp register
66  );
67
68  // allocation of fixed-size objects
69  // (can also be used to allocate fixed-size arrays, by setting
70  // hdr_size correctly and storing the array length afterwards)
71  // obj        : must be rax, will contain pointer to allocated object
72  // t1, t2     : scratch registers - contents destroyed
73  // header_size: size of object header in words
74  // object_size: total size of object in words
75  // slow_case  : exit to slow case implementation if fast allocation fails
76  void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case);
77
78  enum {
79    max_array_allocation_length = 0x00FFFFFF
80  };
81
82  // allocation of arrays
83  // obj        : must be rax, will contain pointer to allocated object
84  // len        : array length in number of elements
85  // t          : scratch register - contents destroyed
86  // header_size: size of object header in words
87  // f          : element scale factor
88  // slow_case  : exit to slow case implementation if fast allocation fails
89  void allocate_array(Register obj, Register len, Register t, Register t2, int header_size, Address::ScaleFactor f, Register klass, Label& slow_case);
90
91  int  rsp_offset() const { return _rsp_offset; }
92  void set_rsp_offset(int n) { _rsp_offset = n; }
93
94  // Note: NEVER push values directly, but only through following push_xxx functions;
95  //       This helps us to track the rsp changes compared to the entry rsp (->_rsp_offset)
96
97  void push_jint (jint i)     { _rsp_offset++; push(i); }
98  void push_oop  (jobject o)  { _rsp_offset++; pushoop(o); }
99  // Seems to always be in wordSize
100  void push_addr (Address a)  { _rsp_offset++; pushptr(a); }
101  void push_reg  (Register r) { _rsp_offset++; push(r); }
102  void pop_reg   (Register r) { _rsp_offset--; pop(r); assert(_rsp_offset >= 0, "stack offset underflow"); }
103
104  void dec_stack (int nof_words) {
105    _rsp_offset -= nof_words;
106    assert(_rsp_offset >= 0, "stack offset underflow");
107    addptr(rsp, wordSize * nof_words);
108  }
109
110  void dec_stack_after_call (int nof_words) {
111    _rsp_offset -= nof_words;
112    assert(_rsp_offset >= 0, "stack offset underflow");
113  }
114
115  void invalidate_registers(bool inv_rax, bool inv_rbx, bool inv_rcx, bool inv_rdx, bool inv_rsi, bool inv_rdi) PRODUCT_RETURN;
116