1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_SRC_OAT_UTILS_X86_MANAGED_REGISTER_X86_H_
#define ART_SRC_OAT_UTILS_X86_MANAGED_REGISTER_X86_H_
#include "constants_x86.h"
#include "oat/utils/managed_register.h"
namespace art {
namespace x86 {
// Values for register pairs.
// The registers in kReservedCpuRegistersArray in x86.cc are not used in pairs.
// The table kRegisterPairs in x86.cc must be kept in sync with this enum.
enum RegisterPair {
EAX_EDX = 0,
EAX_ECX = 1,
EAX_EBX = 2,
EAX_EDI = 3,
EDX_ECX = 4,
EDX_EBX = 5,
EDX_EDI = 6,
ECX_EBX = 7,
ECX_EDI = 8,
EBX_EDI = 9,
kNumberOfRegisterPairs = 10,
kNoRegisterPair = -1,
};
std::ostream& operator<<(std::ostream& os, const RegisterPair& reg);
const int kNumberOfCpuRegIds = kNumberOfCpuRegisters;
const int kNumberOfCpuAllocIds = kNumberOfCpuRegisters;
const int kNumberOfXmmRegIds = kNumberOfXmmRegisters;
const int kNumberOfXmmAllocIds = kNumberOfXmmRegisters;
const int kNumberOfX87RegIds = kNumberOfX87Registers;
const int kNumberOfX87AllocIds = kNumberOfX87Registers;
const int kNumberOfPairRegIds = kNumberOfRegisterPairs;
const int kNumberOfRegIds = kNumberOfCpuRegIds + kNumberOfXmmRegIds +
kNumberOfX87RegIds + kNumberOfPairRegIds;
const int kNumberOfAllocIds = kNumberOfCpuAllocIds + kNumberOfXmmAllocIds +
kNumberOfX87RegIds;
// Register ids map:
// [0..R[ cpu registers (enum Register)
// [R..X[ xmm registers (enum XmmRegister)
// [X..S[ x87 registers (enum X87Register)
// [S..P[ register pairs (enum RegisterPair)
// where
// R = kNumberOfCpuRegIds
// X = R + kNumberOfXmmRegIds
// S = X + kNumberOfX87RegIds
// P = X + kNumberOfRegisterPairs
// Allocation ids map:
// [0..R[ cpu registers (enum Register)
// [R..X[ xmm registers (enum XmmRegister)
// [X..S[ x87 registers (enum X87Register)
// where
// R = kNumberOfCpuRegIds
// X = R + kNumberOfXmmRegIds
// S = X + kNumberOfX87RegIds
// An instance of class 'ManagedRegister' represents a single cpu register (enum
// Register), an xmm register (enum XmmRegister), or a pair of cpu registers
// (enum RegisterPair).
// 'ManagedRegister::NoRegister()' provides an invalid register.
// There is a one-to-one mapping between ManagedRegister and register id.
class X86ManagedRegister : public ManagedRegister {
public:
ByteRegister AsByteRegister() const {
CHECK(IsCpuRegister());
CHECK_LT(AsCpuRegister(), ESP); // ESP, EBP, ESI and EDI cannot be encoded as byte registers.
return static_cast<ByteRegister>(id_);
}
Register AsCpuRegister() const {
CHECK(IsCpuRegister());
return static_cast<Register>(id_);
}
XmmRegister AsXmmRegister() const {
CHECK(IsXmmRegister());
return static_cast<XmmRegister>(id_ - kNumberOfCpuRegIds);
}
X87Register AsX87Register() const {
CHECK(IsX87Register());
return static_cast<X87Register>(id_ -
(kNumberOfCpuRegIds + kNumberOfXmmRegIds));
}
Register AsRegisterPairLow() const {
CHECK(IsRegisterPair());
// Appropriate mapping of register ids allows to use AllocIdLow().
return FromRegId(AllocIdLow()).AsCpuRegister();
}
Register AsRegisterPairHigh() const {
CHECK(IsRegisterPair());
// Appropriate mapping of register ids allows to use AllocIdHigh().
return FromRegId(AllocIdHigh()).AsCpuRegister();
}
bool IsCpuRegister() const {
CHECK(IsValidManagedRegister());
return (0 <= id_) && (id_ < kNumberOfCpuRegIds);
}
bool IsXmmRegister() const {
CHECK(IsValidManagedRegister());
const int test = id_ - kNumberOfCpuRegIds;
return (0 <= test) && (test < kNumberOfXmmRegIds);
}
bool IsX87Register() const {
CHECK(IsValidManagedRegister());
const int test = id_ - (kNumberOfCpuRegIds + kNumberOfXmmRegIds);
return (0 <= test) && (test < kNumberOfX87RegIds);
}
bool IsRegisterPair() const {
CHECK(IsValidManagedRegister());
const int test = id_ -
(kNumberOfCpuRegIds + kNumberOfXmmRegIds + kNumberOfX87RegIds);
return (0 <= test) && (test < kNumberOfPairRegIds);
}
void Print(std::ostream& os) const;
// Returns true if the two managed-registers ('this' and 'other') overlap.
// Either managed-register may be the NoRegister. If both are the NoRegister
// then false is returned.
bool Overlaps(const X86ManagedRegister& other) const;
static X86ManagedRegister FromCpuRegister(Register r) {
CHECK_NE(r, kNoRegister);
return FromRegId(r);
}
static X86ManagedRegister FromXmmRegister(XmmRegister r) {
CHECK_NE(r, kNoXmmRegister);
return FromRegId(r + kNumberOfCpuRegIds);
}
static X86ManagedRegister FromX87Register(X87Register r) {
CHECK_NE(r, kNoX87Register);
return FromRegId(r + kNumberOfCpuRegIds + kNumberOfXmmRegIds);
}
static X86ManagedRegister FromRegisterPair(RegisterPair r) {
CHECK_NE(r, kNoRegisterPair);
return FromRegId(r + (kNumberOfCpuRegIds + kNumberOfXmmRegIds +
kNumberOfX87RegIds));
}
private:
bool IsValidManagedRegister() const {
return (0 <= id_) && (id_ < kNumberOfRegIds);
}
int RegId() const {
CHECK(!IsNoRegister());
return id_;
}
int AllocId() const {
CHECK(IsValidManagedRegister() && !IsRegisterPair());
CHECK_LT(id_, kNumberOfAllocIds);
return id_;
}
int AllocIdLow() const;
int AllocIdHigh() const;
friend class ManagedRegister;
explicit X86ManagedRegister(int reg_id) : ManagedRegister(reg_id) {}
static X86ManagedRegister FromRegId(int reg_id) {
X86ManagedRegister reg(reg_id);
CHECK(reg.IsValidManagedRegister());
return reg;
}
};
std::ostream& operator<<(std::ostream& os, const X86ManagedRegister& reg);
} // namespace x86
inline x86::X86ManagedRegister ManagedRegister::AsX86() const {
x86::X86ManagedRegister reg(id_);
CHECK(reg.IsNoRegister() || reg.IsValidManagedRegister());
return reg;
}
} // namespace art
#endif // ART_SRC_OAT_UTILS_X86_MANAGED_REGISTER_X86_H_
|
