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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef VM_CONSTANTS_X64_H_ | 5 #ifndef VM_CONSTANTS_X64_H_ |
6 #define VM_CONSTANTS_X64_H_ | 6 #define VM_CONSTANTS_X64_H_ |
7 | 7 |
8 namespace dart { | 8 namespace dart { |
9 | 9 |
10 enum Register { | 10 enum Register { |
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78 REX_B = 1 << 0, | 78 REX_B = 1 << 0, |
79 REX_X = 1 << 1, | 79 REX_X = 1 << 1, |
80 REX_R = 1 << 2, | 80 REX_R = 1 << 2, |
81 REX_W = 1 << 3, | 81 REX_W = 1 << 3, |
82 REX_PREFIX = 1 << 6 | 82 REX_PREFIX = 1 << 6 |
83 }; | 83 }; |
84 | 84 |
85 | 85 |
86 // Register aliases. | 86 // Register aliases. |
87 const Register TMP = R11; // Used as scratch register by the assembler. | 87 const Register TMP = R11; // Used as scratch register by the assembler. |
| 88 const Register TMP2 = kNoRegister; // No second assembler scratch register. |
88 const Register CTX = R14; // Caches current context in generated code. | 89 const Register CTX = R14; // Caches current context in generated code. |
89 // Caches object pool pointer in generated code. | 90 // Caches object pool pointer in generated code. |
90 const Register PP = R15; | 91 const Register PP = R15; |
91 const Register SPREG = RSP; // Stack pointer register. | 92 const Register SPREG = RSP; // Stack pointer register. |
92 const Register FPREG = RBP; // Frame pointer register. | 93 const Register FPREG = RBP; // Frame pointer register. |
93 const Register ICREG = RBX; // IC data register. | 94 const Register ICREG = RBX; // IC data register. |
94 | 95 |
95 // Exception object is passed in this register to the catch handlers when an | 96 // Exception object is passed in this register to the catch handlers when an |
96 // exception is thrown. | 97 // exception is thrown. |
97 const Register kExceptionObjectReg = RAX; | 98 const Register kExceptionObjectReg = RAX; |
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163 }; | 164 }; |
164 | 165 |
165 | 166 |
166 // The largest multibyte nop we will emit. This could go up to 15 if it | 167 // The largest multibyte nop we will emit. This could go up to 15 if it |
167 // becomes important to us. | 168 // becomes important to us. |
168 const int MAX_NOP_SIZE = 8; | 169 const int MAX_NOP_SIZE = 8; |
169 | 170 |
170 } // namespace dart | 171 } // namespace dart |
171 | 172 |
172 #endif // VM_CONSTANTS_X64_H_ | 173 #endif // VM_CONSTANTS_X64_H_ |
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