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1 // Copyright 2006-2009 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2009 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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1116 #else | 1116 #else |
1117 static const int kMantissaOffset = kValueOffset + 4; | 1117 static const int kMantissaOffset = kValueOffset + 4; |
1118 static const int kExponentOffset = kValueOffset; | 1118 static const int kExponentOffset = kValueOffset; |
1119 # define BIG_ENDIAN_FLOATING_POINT 1 | 1119 # define BIG_ENDIAN_FLOATING_POINT 1 |
1120 #endif | 1120 #endif |
1121 static const int kSize = kValueOffset + kDoubleSize; | 1121 static const int kSize = kValueOffset + kDoubleSize; |
1122 static const uint32_t kSignMask = 0x80000000u; | 1122 static const uint32_t kSignMask = 0x80000000u; |
1123 static const uint32_t kExponentMask = 0x7ff00000u; | 1123 static const uint32_t kExponentMask = 0x7ff00000u; |
1124 static const uint32_t kMantissaMask = 0xfffffu; | 1124 static const uint32_t kMantissaMask = 0xfffffu; |
1125 static const int kMantissaBits = 52; | 1125 static const int kMantissaBits = 52; |
1126 static const int KExponentBits = 11; | 1126 static const int kExponentBits = 11; |
1127 static const int kExponentBias = 1023; | 1127 static const int kExponentBias = 1023; |
1128 static const int kExponentShift = 20; | 1128 static const int kExponentShift = 20; |
1129 static const int kMantissaBitsInTopWord = 20; | 1129 static const int kMantissaBitsInTopWord = 20; |
1130 static const int kNonMantissaBitsInTopWord = 12; | 1130 static const int kNonMantissaBitsInTopWord = 12; |
1131 | 1131 |
1132 private: | 1132 private: |
1133 DISALLOW_IMPLICIT_CONSTRUCTORS(HeapNumber); | 1133 DISALLOW_IMPLICIT_CONSTRUCTORS(HeapNumber); |
1134 }; | 1134 }; |
1135 | 1135 |
1136 | 1136 |
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2825 static const int kHeaderSize = | 2825 static const int kHeaderSize = |
2826 (kKindSpecificFlagsOffset + kIntSize + kCodeAlignmentMask) & | 2826 (kKindSpecificFlagsOffset + kIntSize + kCodeAlignmentMask) & |
2827 ~kCodeAlignmentMask; | 2827 ~kCodeAlignmentMask; |
2828 | 2828 |
2829 // Byte offsets within kKindSpecificFlagsOffset. | 2829 // Byte offsets within kKindSpecificFlagsOffset. |
2830 static const int kStubMajorKeyOffset = kKindSpecificFlagsOffset + 1; | 2830 static const int kStubMajorKeyOffset = kKindSpecificFlagsOffset + 1; |
2831 | 2831 |
2832 // Flags layout. | 2832 // Flags layout. |
2833 static const int kFlagsICStateShift = 0; | 2833 static const int kFlagsICStateShift = 0; |
2834 static const int kFlagsICInLoopShift = 3; | 2834 static const int kFlagsICInLoopShift = 3; |
2835 static const int kFlagsKindShift = 4; | 2835 static const int kFlagsTypeShift = 4; |
2836 static const int kFlagsTypeShift = 8; | 2836 static const int kFlagsKindShift = 7; |
2837 static const int kFlagsArgumentsCountShift = 11; | 2837 static const int kFlagsArgumentsCountShift = 11; |
2838 | 2838 |
2839 static const int kFlagsICStateMask = 0x00000007; // 00000000111 | 2839 static const int kFlagsICStateMask = 0x00000007; // 00000000111 |
2840 static const int kFlagsICInLoopMask = 0x00000008; // 00000001000 | 2840 static const int kFlagsICInLoopMask = 0x00000008; // 00000001000 |
2841 static const int kFlagsKindMask = 0x000000F0; // 00011110000 | 2841 static const int kFlagsTypeMask = 0x00000070; // 00001110000 |
2842 static const int kFlagsTypeMask = 0x00000700; // 11100000000 | 2842 static const int kFlagsKindMask = 0x00000780; // 11110000000 |
2843 static const int kFlagsArgumentsCountMask = 0xFFFFF800; | 2843 static const int kFlagsArgumentsCountMask = 0xFFFFF800; |
2844 | 2844 |
2845 static const int kFlagsNotUsedInLookup = | 2845 static const int kFlagsNotUsedInLookup = |
2846 (kFlagsICInLoopMask | kFlagsTypeMask); | 2846 (kFlagsICInLoopMask | kFlagsTypeMask); |
2847 | 2847 |
2848 private: | 2848 private: |
2849 DISALLOW_IMPLICIT_CONSTRUCTORS(Code); | 2849 DISALLOW_IMPLICIT_CONSTRUCTORS(Code); |
2850 }; | 2850 }; |
2851 | 2851 |
2852 | 2852 |
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5278 } else { | 5278 } else { |
5279 value &= ~(1 << bit_position); | 5279 value &= ~(1 << bit_position); |
5280 } | 5280 } |
5281 return value; | 5281 return value; |
5282 } | 5282 } |
5283 }; | 5283 }; |
5284 | 5284 |
5285 } } // namespace v8::internal | 5285 } } // namespace v8::internal |
5286 | 5286 |
5287 #endif // V8_OBJECTS_H_ | 5287 #endif // V8_OBJECTS_H_ |
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