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annotate src/cpu/x86/vm/c1_MacroAssembler_x86.hpp @ 4136:61165f53f165 jdk8-b18
Added tag hs23-b08 for changeset a2fef924d8e6
author | amurillo |
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date | Fri, 16 Dec 2011 12:37:38 -0800 |
parents | f95d63e2154a |
children | b648304ba4ff |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP |
26 #define CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP | |
27 | |
0 | 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 ); | |
70 | |
71 // allocation of fixed-size objects | |
72 // (can also be used to allocate fixed-size arrays, by setting | |
73 // hdr_size correctly and storing the array length afterwards) | |
74 // obj : must be rax, will contain pointer to allocated object | |
75 // t1, t2 : scratch registers - contents destroyed | |
76 // header_size: size of object header in words | |
77 // object_size: total size of object in words | |
78 // slow_case : exit to slow case implementation if fast allocation fails | |
79 void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case); | |
80 | |
81 enum { | |
82 max_array_allocation_length = 0x00FFFFFF | |
83 }; | |
84 | |
85 // allocation of arrays | |
86 // obj : must be rax, will contain pointer to allocated object | |
87 // len : array length in number of elements | |
88 // t : scratch register - contents destroyed | |
89 // header_size: size of object header in words | |
90 // f : element scale factor | |
91 // slow_case : exit to slow case implementation if fast allocation fails | |
92 void allocate_array(Register obj, Register len, Register t, Register t2, int header_size, Address::ScaleFactor f, Register klass, Label& slow_case); | |
93 | |
94 int rsp_offset() const { return _rsp_offset; } | |
95 void set_rsp_offset(int n) { _rsp_offset = n; } | |
96 | |
97 // Note: NEVER push values directly, but only through following push_xxx functions; | |
98 // This helps us to track the rsp changes compared to the entry rsp (->_rsp_offset) | |
99 | |
304 | 100 void push_jint (jint i) { _rsp_offset++; push(i); } |
0 | 101 void push_oop (jobject o) { _rsp_offset++; pushoop(o); } |
304 | 102 // Seems to always be in wordSize |
103 void push_addr (Address a) { _rsp_offset++; pushptr(a); } | |
104 void push_reg (Register r) { _rsp_offset++; push(r); } | |
105 void pop_reg (Register r) { _rsp_offset--; pop(r); assert(_rsp_offset >= 0, "stack offset underflow"); } | |
0 | 106 |
107 void dec_stack (int nof_words) { | |
108 _rsp_offset -= nof_words; | |
109 assert(_rsp_offset >= 0, "stack offset underflow"); | |
304 | 110 addptr(rsp, wordSize * nof_words); |
0 | 111 } |
112 | |
113 void dec_stack_after_call (int nof_words) { | |
114 _rsp_offset -= nof_words; | |
115 assert(_rsp_offset >= 0, "stack offset underflow"); | |
116 } | |
117 | |
118 void invalidate_registers(bool inv_rax, bool inv_rbx, bool inv_rcx, bool inv_rdx, bool inv_rsi, bool inv_rdi) PRODUCT_RETURN; | |
1972 | 119 |
120 #endif // CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP |