1 /*
2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * 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
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP
26 #define CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP
27
28 // C1_MacroAssembler contains high-level macros for C1
29
30 private:
31 int _rsp_offset; // track rsp changes
32 // initialization
33 void pd_init() { _rsp_offset = 0; }
34
35 public:
36 void try_allocate(
37 Register obj, // result: pointer to object after successful allocation
38 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
39 int con_size_in_bytes, // object size in bytes if known at compile time
40 Register t1, // temp register
41 Register t2, // temp register
42 Label& slow_case // continuation point if fast allocation fails
43 );
44
45 void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2);
46 void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1);
47
48 // locking
49 // hdr : must be rax, contents destroyed
50 // obj : must point to the object to lock, contents preserved
51 // disp_hdr: must point to the displaced header location, contents preserved
52 // scratch : scratch register, contents destroyed
53 // returns code offset at which to add null check debug information
54 int lock_object (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case);
55
56 // unlocking
57 // hdr : contents destroyed
58 // obj : must point to the object to lock, contents preserved
59 // disp_hdr: must be eax & must point to the displaced header location, contents destroyed
60 void unlock_object(Register swap, Register obj, Register lock, Label& slow_case);
61
62 void initialize_object(
63 Register obj, // result: pointer to object after successful allocation
64 Register klass, // object klass
65 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
66 int con_size_in_bytes, // object size in bytes if known at compile time
67 Register t1, // temp register
68 Register t2, // temp register
69 bool is_tlab_allocated // the object was allocated in a TLAB; relevant for the implementation of ZeroTLAB
70 );
71
72 // allocation of fixed-size objects
73 // (can also be used to allocate fixed-size arrays, by setting
74 // hdr_size correctly and storing the array length afterwards)
75 // obj : must be rax, will contain pointer to allocated object
76 // t1, t2 : scratch registers - contents destroyed
77 // header_size: size of object header in words
78 // object_size: total size of object in words
79 // slow_case : exit to slow case implementation if fast allocation fails
80 void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case);
81
82 enum {
83 max_array_allocation_length = 0x00FFFFFF
84 };
85
86 // allocation of arrays
87 // obj : must be rax, will contain pointer to allocated object
88 // len : array length in number of elements
89 // t : scratch register - contents destroyed
90 // header_size: size of object header in words
91 // f : element scale factor
92 // slow_case : exit to slow case implementation if fast allocation fails
93 void allocate_array(Register obj, Register len, Register t, Register t2, int header_size, Address::ScaleFactor f, Register klass, Label& slow_case);
94
95 int rsp_offset() const { return _rsp_offset; }
96 void set_rsp_offset(int n) { _rsp_offset = n; }
97
98 // Note: NEVER push values directly, but only through following push_xxx functions;
99 // This helps us to track the rsp changes compared to the entry rsp (->_rsp_offset)
100
101 void push_jint (jint i) { _rsp_offset++; push(i); }
102 void push_oop (jobject o) { _rsp_offset++; pushoop(o); }
103 // Seems to always be in wordSize
104 void push_addr (Address a) { _rsp_offset++; pushptr(a); }
105 void push_reg (Register r) { _rsp_offset++; push(r); }
106 void pop_reg (Register r) { _rsp_offset--; pop(r); assert(_rsp_offset >= 0, "stack offset underflow"); }
107
108 void dec_stack (int nof_words) {
109 _rsp_offset -= nof_words;
110 assert(_rsp_offset >= 0, "stack offset underflow");
111 addptr(rsp, wordSize * nof_words);
112 }
113
114 void dec_stack_after_call (int nof_words) {
115 _rsp_offset -= nof_words;
116 assert(_rsp_offset >= 0, "stack offset underflow");
117 }
118
119 void invalidate_registers(bool inv_rax, bool inv_rbx, bool inv_rcx, bool inv_rdx, bool inv_rsi, bool inv_rdi) PRODUCT_RETURN;
120
121 // This platform only uses signal-based null checks. The Label is not needed.
122 void null_check(Register r, Label *Lnull = NULL) { MacroAssembler::null_check(r); }
123
124 #endif // CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP