1 /*
2 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, 2015, Red Hat Inc. All rights reserved.
4 * Copyright (c) 2020, 2022, Huawei Technologies Co., Ltd. All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #ifndef CPU_RISCV_C1_MACROASSEMBLER_RISCV_HPP
28 #define CPU_RISCV_C1_MACROASSEMBLER_RISCV_HPP
29
30 using MacroAssembler::build_frame;
31 using MacroAssembler::null_check;
32
33 // C1_MacroAssembler contains high-level macros for C1
34
35 private:
36 int _rsp_offset; // track rsp changes
37 // initialization
38 void pd_init() { _rsp_offset = 0; }
39
40
41 public:
42 void try_allocate(
43 Register obj, // result: pointer to object after successful allocation
44 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
45 int con_size_in_bytes, // object size in bytes if known at compile time
46 Register tmp1, // temp register
47 Register tmp2, // temp register
48 Label& slow_case // continuation point if fast allocation fails
49 );
50
51 void initialize_header(Register obj, Register klass, Register len, Register tmp1, Register tmp2);
52 void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register tmp);
53
54 void float_cmp(bool is_float, int unordered_result,
55 FloatRegister f0, FloatRegister f1,
56 Register result);
57
58 // locking
59 // hdr : must be x10, contents destroyed
60 // obj : must point to the object to lock, contents preserved
61 // disp_hdr: must point to the displaced header location, contents preserved
62 // temp : temporary register, must not be scratch register t0 or t1
63 // returns code offset at which to add null check debug information
64 int lock_object(Register swap, Register obj, Register disp_hdr, Register temp, Label& slow_case);
65
66 // unlocking
67 // hdr : contents destroyed
68 // obj : must point to the object to lock, contents preserved
69 // disp_hdr: must be x10 & must point to the displaced header location, contents destroyed
70 // temp : temporary register, must not be scratch register t0 or t1
71 void unlock_object(Register swap, Register obj, Register lock, Register temp, Label& slow_case);
72
73 void initialize_object(
74 Register obj, // result: pointer to object after successful allocation
75 Register klass, // object klass
76 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
77 int con_size_in_bytes, // object size in bytes if known at compile time
78 Register tmp1, // temp register
79 Register tmp2, // temp register
80 bool is_tlab_allocated // the object was allocated in a TLAB; relevant for the implementation of ZeroTLAB
81 );
82
83 // allocation of fixed-size objects
84 // (can also be used to allocate fixed-size arrays, by setting
85 // hdr_size correctly and storing the array length afterwards)
86 // obj : will contain pointer to allocated object
87 // t1, t2 : temp registers - contents destroyed
88 // header_size: size of object header in words
89 // object_size: total size of object in words
90 // slow_case : exit to slow case implementation if fast allocation fails
91 void allocate_object(Register obj, Register tmp1, Register tmp2, int header_size, int object_size, Register klass, Label& slow_case);
92
93 enum {
94 max_array_allocation_length = 0x00FFFFFF
95 };
96
97 // allocation of arrays
98 // obj : will contain pointer to allocated object
99 // len : array length in number of elements
100 // t : temp register - contents destroyed
101 // header_size: size of object header in words
102 // f : element scale factor
103 // slow_case : exit to slow case implementation if fast allocation fails
104 void allocate_array(Register obj, Register len, Register tmp1, Register tmp2, int header_size, int f, Register klass, Label& slow_case);
105
106 int rsp_offset() const { return _rsp_offset; }
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 void inline_cache_check(Register receiver, Register iCache, Label &L);
116
117 static const int c1_double_branch_mask = 1 << 3; // depend on c1_float_cond_branch
118 void c1_cmp_branch(int cmpFlag, Register op1, Register op2, Label& label, BasicType type, bool is_far);
119 void c1_float_cmp_branch(int cmpFlag, FloatRegister op1, FloatRegister op2, Label& label,
120 bool is_far, bool is_unordered = false);
121
122 #endif // CPU_RISCV_C1_MACROASSEMBLER_RISCV_HPP