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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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45 const intptr_t kObjectAlignmentMask = kObjectAlignment - 1; | 45 const intptr_t kObjectAlignmentMask = kObjectAlignment - 1; |
46 | 46 |
47 // Desired alignment for pointers. | 47 // Desired alignment for pointers. |
48 const intptr_t kPointerAlignment = (1 << kPointerSizeLog2); | 48 const intptr_t kPointerAlignment = (1 << kPointerSizeLog2); |
49 const intptr_t kPointerAlignmentMask = kPointerAlignment - 1; | 49 const intptr_t kPointerAlignmentMask = kPointerAlignment - 1; |
50 | 50 |
51 // Desired alignment for double values. | 51 // Desired alignment for double values. |
52 const intptr_t kDoubleAlignment = 8; | 52 const intptr_t kDoubleAlignment = 8; |
53 const intptr_t kDoubleAlignmentMask = kDoubleAlignment - 1; | 53 const intptr_t kDoubleAlignmentMask = kDoubleAlignment - 1; |
54 | 54 |
55 // Desired alignment for maps. | |
56 #if V8_HOST_ARCH_64_BIT | |
57 const intptr_t kMapAlignmentBits = kObjectAlignmentBits; | |
58 #else | |
59 const intptr_t kMapAlignmentBits = kObjectAlignmentBits + 3; | |
60 #endif | |
61 const intptr_t kMapAlignment = (1 << kMapAlignmentBits); | |
62 const intptr_t kMapAlignmentMask = kMapAlignment - 1; | |
63 | |
64 // Desired alignment for generated code is 32 bytes (to improve cache line | 55 // Desired alignment for generated code is 32 bytes (to improve cache line |
65 // utilization). | 56 // utilization). |
66 const int kCodeAlignmentBits = 5; | 57 const int kCodeAlignmentBits = 5; |
67 const intptr_t kCodeAlignment = 1 << kCodeAlignmentBits; | 58 const intptr_t kCodeAlignment = 1 << kCodeAlignmentBits; |
68 const intptr_t kCodeAlignmentMask = kCodeAlignment - 1; | 59 const intptr_t kCodeAlignmentMask = kCodeAlignment - 1; |
69 | 60 |
70 // Tag information for Failure. | 61 // Tag information for Failure. |
71 const int kFailureTag = 3; | 62 const int kFailureTag = 3; |
72 const int kFailureTagSize = 2; | 63 const int kFailureTagSize = 2; |
73 const intptr_t kFailureTagMask = (1 << kFailureTagSize) - 1; | 64 const intptr_t kFailureTagMask = (1 << kFailureTagSize) - 1; |
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389 ((reinterpret_cast<intptr_t>(value) & kFailureTagMask) == kFailureTag) | 380 ((reinterpret_cast<intptr_t>(value) & kFailureTagMask) == kFailureTag) |
390 | 381 |
391 // OBJECT_POINTER_ALIGN returns the value aligned as a HeapObject pointer | 382 // OBJECT_POINTER_ALIGN returns the value aligned as a HeapObject pointer |
392 #define OBJECT_POINTER_ALIGN(value) \ | 383 #define OBJECT_POINTER_ALIGN(value) \ |
393 (((value) + kObjectAlignmentMask) & ~kObjectAlignmentMask) | 384 (((value) + kObjectAlignmentMask) & ~kObjectAlignmentMask) |
394 | 385 |
395 // POINTER_SIZE_ALIGN returns the value aligned as a pointer. | 386 // POINTER_SIZE_ALIGN returns the value aligned as a pointer. |
396 #define POINTER_SIZE_ALIGN(value) \ | 387 #define POINTER_SIZE_ALIGN(value) \ |
397 (((value) + kPointerAlignmentMask) & ~kPointerAlignmentMask) | 388 (((value) + kPointerAlignmentMask) & ~kPointerAlignmentMask) |
398 | 389 |
399 // MAP_POINTER_ALIGN returns the value aligned as a map pointer. | |
400 #define MAP_POINTER_ALIGN(value) \ | |
401 (((value) + kMapAlignmentMask) & ~kMapAlignmentMask) | |
402 | |
403 // CODE_POINTER_ALIGN returns the value aligned as a generated code segment. | 390 // CODE_POINTER_ALIGN returns the value aligned as a generated code segment. |
404 #define CODE_POINTER_ALIGN(value) \ | 391 #define CODE_POINTER_ALIGN(value) \ |
405 (((value) + kCodeAlignmentMask) & ~kCodeAlignmentMask) | 392 (((value) + kCodeAlignmentMask) & ~kCodeAlignmentMask) |
406 | 393 |
407 // Support for tracking C++ memory allocation. Insert TRACK_MEMORY("Fisk") | 394 // Support for tracking C++ memory allocation. Insert TRACK_MEMORY("Fisk") |
408 // inside a C++ class and new and delete will be overloaded so logging is | 395 // inside a C++ class and new and delete will be overloaded so logging is |
409 // performed. | 396 // performed. |
410 // This file (globals.h) is included before log.h, so we use direct calls to | 397 // This file (globals.h) is included before log.h, so we use direct calls to |
411 // the Logger rather than the LOG macro. | 398 // the Logger rather than the LOG macro. |
412 #ifdef DEBUG | 399 #ifdef DEBUG |
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572 | 559 |
573 enum ClearExceptionFlag { | 560 enum ClearExceptionFlag { |
574 KEEP_EXCEPTION, | 561 KEEP_EXCEPTION, |
575 CLEAR_EXCEPTION | 562 CLEAR_EXCEPTION |
576 }; | 563 }; |
577 | 564 |
578 | 565 |
579 } } // namespace v8::internal | 566 } } // namespace v8::internal |
580 | 567 |
581 #endif // V8_V8GLOBALS_H_ | 568 #endif // V8_V8GLOBALS_H_ |
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