1 /*
2 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, 2021, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #ifndef CPU_AARCH64_C1_MACROASSEMBLER_AARCH64_HPP
27 #define CPU_AARCH64_C1_MACROASSEMBLER_AARCH64_HPP
28
29 using MacroAssembler::build_frame;
30 using MacroAssembler::null_check;
31
32 // C1_MacroAssembler contains high-level macros for C1
33
34 private:
35 int _rsp_offset; // track rsp changes
36 // initialization
37 void pd_init() { _rsp_offset = 0; }
38
39
40 public:
41 void try_allocate(
42 Register obj, // result: pointer to object after successful allocation
43 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
44 int con_size_in_bytes, // object size in bytes if known at compile time
45 Register t1, // temp register
46 Register t2, // temp register
47 Label& slow_case // continuation point if fast allocation fails
48 );
49
50 void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2);
51 void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1, Register t2);
52
53 void float_cmp(bool is_float, int unordered_result,
54 FloatRegister f0, FloatRegister f1,
55 Register result);
56
57 // locking
58 // hdr : must be r0, contents destroyed
59 // obj : must point to the object to lock, contents preserved
60 // disp_hdr: must point to the displaced header location, contents preserved
61 // temp : temporary register, must not be rscratch1 or rscratch2
62 // returns code offset at which to add null check debug information
63 int lock_object (Register swap, Register obj, Register disp_hdr, Register temp, Label& slow_case);
64
65 // unlocking
66 // hdr : contents destroyed
67 // obj : must point to the object to lock, contents preserved
68 // disp_hdr: must be r0 & must point to the displaced header location, contents destroyed
69 // temp : temporary register, must not be rscratch1 or rscratch2
70 void unlock_object(Register swap, Register obj, Register lock, Register temp, Label& slow_case);
71
72 void initialize_object(
73 Register obj, // result: pointer to object after successful allocation
74 Register klass, // object klass
75 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
76 int con_size_in_bytes, // object size in bytes if known at compile time
77 Register t1, // temp register
78 Register t2, // temp register
79 bool is_tlab_allocated // the object was allocated in a TLAB; relevant for the implementation of ZeroTLAB
80 );
81
82 // allocation of fixed-size objects
83 // (can also be used to allocate fixed-size arrays, by setting
84 // hdr_size correctly and storing the array length afterwards)
85 // obj : will contain pointer to allocated object
86 // t1, t2 : scratch registers - contents destroyed
87 // header_size: size of object header in words
88 // object_size: total size of object in words
89 // slow_case : exit to slow case implementation if fast allocation fails
90 void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case);
91
92 enum {
93 max_array_allocation_length = 0x00FFFFFF
94 };
95
96 // allocation of arrays
97 // obj : will contain pointer to allocated object
98 // len : array length in number of elements
99 // t : scratch register - contents destroyed
100 // header_size: size of object header in words
101 // f : element scale factor
102 // slow_case : exit to slow case implementation if fast allocation fails
103 void allocate_array(Register obj, Register len, Register t, Register t2, int header_size, int f, Register klass, Label& slow_case);
104
105 int rsp_offset() const { return _rsp_offset; }
106 void set_rsp_offset(int n) { _rsp_offset = n; }
107
108 void invalidate_registers(bool inv_r0, bool inv_r19, bool inv_r2, bool inv_r3, bool inv_r4, bool inv_r5) PRODUCT_RETURN;
109
110 // This platform only uses signal-based null checks. The Label is not needed.
111 void null_check(Register r, Label *Lnull = nullptr) { MacroAssembler::null_check(r); }
112
113 void load_parameter(int offset_in_words, Register reg);
114
115 #endif // CPU_AARCH64_C1_MACROASSEMBLER_AARCH64_HPP