1 /*
2 * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, 2020, 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_REGISTER_AARCH64_HPP
27 #define CPU_AARCH64_REGISTER_AARCH64_HPP
28
29 #include "asm/register.hpp"
30
31 class VMRegImpl;
32 typedef VMRegImpl* VMReg;
33
34 // Use Register as shortcut
35 class RegisterImpl;
36 typedef RegisterImpl* Register;
37
38 inline Register as_Register(int encoding) {
39 return (Register)(intptr_t) encoding;
40 }
41
42 class RegisterImpl: public AbstractRegisterImpl {
43 public:
44 enum {
45 number_of_registers = 32,
46 number_of_byte_registers = 32,
47 number_of_registers_for_jvmci = 34, // Including SP and ZR.
48 max_slots_per_register = 2
49 };
50
51 // derived registers, offsets, and addresses
52 Register successor() const { return as_Register(encoding() + 1); }
53
54 // construction
55 inline friend Register as_Register(int encoding);
56
57 VMReg as_VMReg();
58
59 // accessors
60 int encoding() const { assert(is_valid(), "invalid register"); return (intptr_t)this; }
61 bool is_valid() const { return 0 <= (intptr_t)this && (intptr_t)this < number_of_registers; }
62 bool has_byte_register() const { return 0 <= (intptr_t)this && (intptr_t)this < number_of_byte_registers; }
63 const char* name() const;
64 int encoding_nocheck() const { return (intptr_t)this; }
65
66 // Return the bit which represents this register. This is intended
67 // to be ORed into a bitmask: for usage see class RegSet below.
68 uint64_t bit(bool should_set = true) const { return should_set ? 1 << encoding() : 0; }
69 };
70
71 // The integer registers of the aarch64 architecture
72
73 CONSTANT_REGISTER_DECLARATION(Register, noreg, (-1));
74
75
76 CONSTANT_REGISTER_DECLARATION(Register, r0, (0));
77 CONSTANT_REGISTER_DECLARATION(Register, r1, (1));
78 CONSTANT_REGISTER_DECLARATION(Register, r2, (2));
79 CONSTANT_REGISTER_DECLARATION(Register, r3, (3));
80 CONSTANT_REGISTER_DECLARATION(Register, r4, (4));
81 CONSTANT_REGISTER_DECLARATION(Register, r5, (5));
82 CONSTANT_REGISTER_DECLARATION(Register, r6, (6));
83 CONSTANT_REGISTER_DECLARATION(Register, r7, (7));
84 CONSTANT_REGISTER_DECLARATION(Register, r8, (8));
85 CONSTANT_REGISTER_DECLARATION(Register, r9, (9));
86 CONSTANT_REGISTER_DECLARATION(Register, r10, (10));
87 CONSTANT_REGISTER_DECLARATION(Register, r11, (11));
88 CONSTANT_REGISTER_DECLARATION(Register, r12, (12));
89 CONSTANT_REGISTER_DECLARATION(Register, r13, (13));
90 CONSTANT_REGISTER_DECLARATION(Register, r14, (14));
91 CONSTANT_REGISTER_DECLARATION(Register, r15, (15));
92 CONSTANT_REGISTER_DECLARATION(Register, r16, (16));
93 CONSTANT_REGISTER_DECLARATION(Register, r17, (17));
94 CONSTANT_REGISTER_DECLARATION(Register, r18, (18));
95 CONSTANT_REGISTER_DECLARATION(Register, r19, (19));
96 CONSTANT_REGISTER_DECLARATION(Register, r20, (20));
97 CONSTANT_REGISTER_DECLARATION(Register, r21, (21));
98 CONSTANT_REGISTER_DECLARATION(Register, r22, (22));
99 CONSTANT_REGISTER_DECLARATION(Register, r23, (23));
100 CONSTANT_REGISTER_DECLARATION(Register, r24, (24));
101 CONSTANT_REGISTER_DECLARATION(Register, r25, (25));
102 CONSTANT_REGISTER_DECLARATION(Register, r26, (26));
103 CONSTANT_REGISTER_DECLARATION(Register, r27, (27));
104 CONSTANT_REGISTER_DECLARATION(Register, r28, (28));
105 CONSTANT_REGISTER_DECLARATION(Register, r29, (29));
106 CONSTANT_REGISTER_DECLARATION(Register, r30, (30));
107
108
109 // r31 is not a general purpose register, but represents either the
110 // stack pointer or the zero/discard register depending on the
111 // instruction.
112 CONSTANT_REGISTER_DECLARATION(Register, r31_sp, (31));
113 CONSTANT_REGISTER_DECLARATION(Register, zr, (32));
114 CONSTANT_REGISTER_DECLARATION(Register, sp, (33));
115
116 // Used as a filler in instructions where a register field is unused.
117 const Register dummy_reg = r31_sp;
118
119 // Use FloatRegister as shortcut
120 class FloatRegisterImpl;
121 typedef FloatRegisterImpl* FloatRegister;
122
123 inline FloatRegister as_FloatRegister(int encoding) {
124 return (FloatRegister)(intptr_t) encoding;
125 }
126
127 // The implementation of floating point registers for the architecture
128 class FloatRegisterImpl: public AbstractRegisterImpl {
129 public:
130 enum {
131 number_of_registers = 32,
132 max_slots_per_register = 4,
133 save_slots_per_register = 2,
134 extra_save_slots_per_register = max_slots_per_register - save_slots_per_register
135 };
136
137 // construction
138 inline friend FloatRegister as_FloatRegister(int encoding);
139
140 VMReg as_VMReg();
141
142 // derived registers, offsets, and addresses
143 FloatRegister successor() const { return as_FloatRegister((encoding() + 1) % 32); }
144
145 // accessors
146 int encoding() const { assert(is_valid(), "invalid register"); return (intptr_t)this; }
147 int encoding_nocheck() const { return (intptr_t)this; }
148 bool is_valid() const { return 0 <= (intptr_t)this && (intptr_t)this < number_of_registers; }
149 const char* name() const;
150
151 };
152
153 // The float registers of the AARCH64 architecture
154
155 CONSTANT_REGISTER_DECLARATION(FloatRegister, fnoreg , (-1));
156
157 CONSTANT_REGISTER_DECLARATION(FloatRegister, v0 , ( 0));
158 CONSTANT_REGISTER_DECLARATION(FloatRegister, v1 , ( 1));
159 CONSTANT_REGISTER_DECLARATION(FloatRegister, v2 , ( 2));
160 CONSTANT_REGISTER_DECLARATION(FloatRegister, v3 , ( 3));
161 CONSTANT_REGISTER_DECLARATION(FloatRegister, v4 , ( 4));
162 CONSTANT_REGISTER_DECLARATION(FloatRegister, v5 , ( 5));
163 CONSTANT_REGISTER_DECLARATION(FloatRegister, v6 , ( 6));
164 CONSTANT_REGISTER_DECLARATION(FloatRegister, v7 , ( 7));
165 CONSTANT_REGISTER_DECLARATION(FloatRegister, v8 , ( 8));
166 CONSTANT_REGISTER_DECLARATION(FloatRegister, v9 , ( 9));
167 CONSTANT_REGISTER_DECLARATION(FloatRegister, v10 , (10));
168 CONSTANT_REGISTER_DECLARATION(FloatRegister, v11 , (11));
169 CONSTANT_REGISTER_DECLARATION(FloatRegister, v12 , (12));
170 CONSTANT_REGISTER_DECLARATION(FloatRegister, v13 , (13));
171 CONSTANT_REGISTER_DECLARATION(FloatRegister, v14 , (14));
172 CONSTANT_REGISTER_DECLARATION(FloatRegister, v15 , (15));
173 CONSTANT_REGISTER_DECLARATION(FloatRegister, v16 , (16));
174 CONSTANT_REGISTER_DECLARATION(FloatRegister, v17 , (17));
175 CONSTANT_REGISTER_DECLARATION(FloatRegister, v18 , (18));
176 CONSTANT_REGISTER_DECLARATION(FloatRegister, v19 , (19));
177 CONSTANT_REGISTER_DECLARATION(FloatRegister, v20 , (20));
178 CONSTANT_REGISTER_DECLARATION(FloatRegister, v21 , (21));
179 CONSTANT_REGISTER_DECLARATION(FloatRegister, v22 , (22));
180 CONSTANT_REGISTER_DECLARATION(FloatRegister, v23 , (23));
181 CONSTANT_REGISTER_DECLARATION(FloatRegister, v24 , (24));
182 CONSTANT_REGISTER_DECLARATION(FloatRegister, v25 , (25));
183 CONSTANT_REGISTER_DECLARATION(FloatRegister, v26 , (26));
184 CONSTANT_REGISTER_DECLARATION(FloatRegister, v27 , (27));
185 CONSTANT_REGISTER_DECLARATION(FloatRegister, v28 , (28));
186 CONSTANT_REGISTER_DECLARATION(FloatRegister, v29 , (29));
187 CONSTANT_REGISTER_DECLARATION(FloatRegister, v30 , (30));
188 CONSTANT_REGISTER_DECLARATION(FloatRegister, v31 , (31));
189
190 // Need to know the total number of registers of all sorts for SharedInfo.
191 // Define a class that exports it.
192 class ConcreteRegisterImpl : public AbstractRegisterImpl {
193 public:
194 enum {
195 // A big enough number for C2: all the registers plus flags
196 // This number must be large enough to cover REG_COUNT (defined by c2) registers.
197 // There is no requirement that any ordering here matches any ordering c2 gives
198 // it's optoregs.
199
200 number_of_registers = (RegisterImpl::max_slots_per_register * RegisterImpl::number_of_registers +
201 FloatRegisterImpl::max_slots_per_register * FloatRegisterImpl::number_of_registers +
202 1) // flags
203 };
204
205 // added to make it compile
206 static const int max_gpr;
207 static const int max_fpr;
208 };
209
210 // A set of registers
211 class RegSet {
212 uint32_t _bitset;
213
214 RegSet(uint32_t bitset) : _bitset(bitset) { }
215
216 public:
217
218 RegSet() : _bitset(0) { }
219
220 RegSet(Register r1) : _bitset(r1->bit()) { }
221
222 RegSet operator+(const RegSet aSet) const {
223 RegSet result(_bitset | aSet._bitset);
224 return result;
225 }
226
227 RegSet operator-(const RegSet aSet) const {
228 RegSet result(_bitset & ~aSet._bitset);
229 return result;
230 }
231
232 RegSet &operator+=(const RegSet aSet) {
233 *this = *this + aSet;
234 return *this;
235 }
236
237 RegSet &operator-=(const RegSet aSet) {
238 *this = *this - aSet;
239 return *this;
240 }
241
242 static RegSet of(Register r1) {
243 return RegSet(r1);
244 }
245
246 static RegSet of(Register r1, Register r2) {
247 return of(r1) + r2;
248 }
249
250 static RegSet of(Register r1, Register r2, Register r3) {
251 return of(r1, r2) + r3;
252 }
253
254 static RegSet of(Register r1, Register r2, Register r3, Register r4) {
255 return of(r1, r2, r3) + r4;
256 }
257
258 static RegSet range(Register start, Register end) {
259 uint32_t bits = ~0;
260 bits <<= start->encoding();
261 bits <<= 31 - end->encoding();
262 bits >>= 31 - end->encoding();
263
264 return RegSet(bits);
265 }
266
267 uint32_t bits() const { return _bitset; }
268 };
269
270 #endif // CPU_AARCH64_REGISTER_AARCH64_HPP