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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_IA32_H_ | 5 #ifndef VM_CONSTANTS_IA32_H_ |
| 6 #define VM_CONSTANTS_IA32_H_ | 6 #define VM_CONSTANTS_IA32_H_ |
| 7 | 7 |
| 8 #include "platform/assert.h" | 8 #include "platform/assert.h" |
| 9 | 9 |
| 10 namespace dart { | 10 namespace dart { |
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| 68 | 68 |
| 69 // Exception object is passed in this register to the catch handlers when an | 69 // Exception object is passed in this register to the catch handlers when an |
| 70 // exception is thrown. | 70 // exception is thrown. |
| 71 const Register kExceptionObjectReg = EAX; | 71 const Register kExceptionObjectReg = EAX; |
| 72 | 72 |
| 73 // Stack trace object is passed in this register to the catch handlers when | 73 // Stack trace object is passed in this register to the catch handlers when |
| 74 // an exception is thrown. | 74 // an exception is thrown. |
| 75 const Register kStackTraceObjectReg = EDX; | 75 const Register kStackTraceObjectReg = EDX; |
| 76 | 76 |
| 77 | 77 |
| 78 // TODO(regis): Move these constants to stack_frame_ia32.h. |
| 78 // Dart stack frame layout. | 79 // Dart stack frame layout. |
| 79 static const int kLastParamSlotIndex = 2; | 80 static const int kLastParamSlotIndex = 2; // From fp. |
| 80 static const int kFirstLocalSlotIndex = -2; | 81 static const int kFirstLocalSlotIndex = -2; // From fp. |
| 82 static const int kPcSlotIndexFromSp = -1; |
| 83 |
| 84 /* IA32 Dart Frame Layout |
| 85 |
| 86 | | <- TOS |
| 87 Callee frame | ... | |
| 88 | current ret addr | (PC of current frame) |
| 89 +-------------------+ |
| 90 Current frame | ... | <- ESP of current frame |
| 91 | first local | |
| 92 | PC Marker | (current frame's code entry) |
| 93 | caller's EBP | <- EBP of current frame |
| 94 | caller's ret addr | (PC of caller frame) |
| 95 +-------------------+ |
| 96 Caller frame | last parameter | |
| 97 | ... | |
| 98 */ |
| 81 | 99 |
| 82 | 100 |
| 83 enum ScaleFactor { | 101 enum ScaleFactor { |
| 84 TIMES_1 = 0, | 102 TIMES_1 = 0, |
| 85 TIMES_2 = 1, | 103 TIMES_2 = 1, |
| 86 TIMES_4 = 2, | 104 TIMES_4 = 2, |
| 87 TIMES_8 = 3, | 105 TIMES_8 = 3, |
| 88 TIMES_16 = 4, | 106 TIMES_16 = 4, |
| 89 TIMES_HALF_WORD_SIZE = kWordSizeLog2 - 1 | 107 TIMES_HALF_WORD_SIZE = kWordSizeLog2 - 1 |
| 90 }; | 108 }; |
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| 142 }; | 160 }; |
| 143 | 161 |
| 144 | 162 |
| 145 // The largest multibyte nop we will emit. This could go up to 15 if it | 163 // The largest multibyte nop we will emit. This could go up to 15 if it |
| 146 // becomes important to us. | 164 // becomes important to us. |
| 147 const int MAX_NOP_SIZE = 8; | 165 const int MAX_NOP_SIZE = 8; |
| 148 | 166 |
| 149 } // namespace dart | 167 } // namespace dart |
| 150 | 168 |
| 151 #endif // VM_CONSTANTS_IA32_H_ | 169 #endif // VM_CONSTANTS_IA32_H_ |
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Chromium Code Reviews
Issue 14812005:
Cleanup deoptimization code to make it architecture independent (in progress). (Closed)
Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/