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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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_GLOBALS_H_ | 5 #ifndef VM_GLOBALS_H_ |
6 #define VM_GLOBALS_H_ | 6 #define VM_GLOBALS_H_ |
7 | 7 |
8 // This file contains global definitions for the VM library only. Anything that | 8 // This file contains global definitions for the VM library only. Anything that |
9 // is more globally useful should be added to 'vm/globals.h'. | 9 // is more globally useful should be added to 'vm/globals.h'. |
10 | 10 |
11 #include "platform/globals.h" | 11 #include "platform/globals.h" |
12 | 12 |
13 #if defined(_WIN32) | 13 #if defined(_WIN32) |
14 // Undef conflicting defines. | 14 // Undef conflicting defines. |
15 #undef PARITY_EVEN | 15 #undef PARITY_EVEN |
16 #undef PARITY_ODD | 16 #undef PARITY_ODD |
17 #undef near | 17 #undef near |
18 #endif | 18 #endif |
19 | 19 |
20 // The following #defines are invalidated. | 20 // The following #defines are invalidated. |
21 #undef OVERFLOW // From math.h conflicts in constants_ia32.h | 21 #undef OVERFLOW // From math.h conflicts in constants_ia32.h |
22 | 22 |
23 namespace dart { | 23 namespace dart { |
24 | 24 |
| 25 // Smi value range is from -(2^N) to (2^N)-1. |
| 26 // N=30 (32-bit build) or N=62 (64-bit build). |
| 27 const intptr_t kSmiBits = kBitsPerWord - 2; |
| 28 const intptr_t kSmiMax = (static_cast<intptr_t>(1) << kSmiBits) - 1; |
| 29 const intptr_t kSmiMin = -(static_cast<intptr_t>(1) << kSmiBits); |
| 30 |
25 // The expression ARRAY_SIZE(array) is a compile-time constant of type | 31 // The expression ARRAY_SIZE(array) is a compile-time constant of type |
26 // size_t which represents the number of elements of the given | 32 // size_t which represents the number of elements of the given |
27 // array. You should only use ARRAY_SIZE on statically allocated | 33 // array. You should only use ARRAY_SIZE on statically allocated |
28 // arrays. | 34 // arrays. |
29 #define ARRAY_SIZE(array) \ | 35 #define ARRAY_SIZE(array) \ |
30 ((sizeof(array) / sizeof(*(array))) / \ | 36 ((sizeof(array) / sizeof(*(array))) / \ |
31 static_cast<intptr_t>(!(sizeof(array) % sizeof(*(array))))) | 37 static_cast<intptr_t>(!(sizeof(array) % sizeof(*(array))))) |
32 | 38 |
33 | 39 |
34 // The expression OFFSET_OF(type, field) computes the byte-offset of | 40 // The expression OFFSET_OF(type, field) computes the byte-offset of |
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60 // contants are 16 byte aligned. | 66 // contants are 16 byte aligned. |
61 #if defined(TARGET_OS_WINDOWS) | 67 #if defined(TARGET_OS_WINDOWS) |
62 #define ALIGN16 __declspec(align(16)) | 68 #define ALIGN16 __declspec(align(16)) |
63 #else | 69 #else |
64 #define ALIGN16 __attribute__((aligned(16))) | 70 #define ALIGN16 __attribute__((aligned(16))) |
65 #endif | 71 #endif |
66 | 72 |
67 } // namespace dart | 73 } // namespace dart |
68 | 74 |
69 #endif // VM_GLOBALS_H_ | 75 #endif // VM_GLOBALS_H_ |
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