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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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140 const int kIntptrSize = sizeof(intptr_t); // NOLINT | 140 const int kIntptrSize = sizeof(intptr_t); // NOLINT |
141 | 141 |
142 #if V8_HOST_ARCH_64_BIT | 142 #if V8_HOST_ARCH_64_BIT |
143 const int kPointerSizeLog2 = 3; | 143 const int kPointerSizeLog2 = 3; |
144 const intptr_t kIntptrSignBit = V8_INT64_C(0x8000000000000000); | 144 const intptr_t kIntptrSignBit = V8_INT64_C(0x8000000000000000); |
145 #else | 145 #else |
146 const int kPointerSizeLog2 = 2; | 146 const int kPointerSizeLog2 = 2; |
147 const intptr_t kIntptrSignBit = 0x80000000; | 147 const intptr_t kIntptrSignBit = 0x80000000; |
148 #endif | 148 #endif |
149 | 149 |
| 150 // Mask for the sign bit in a smi. |
| 151 const intptr_t kSmiSignMask = kIntptrSignBit; |
| 152 |
150 const int kObjectAlignmentBits = kPointerSizeLog2; | 153 const int kObjectAlignmentBits = kPointerSizeLog2; |
151 const intptr_t kObjectAlignment = 1 << kObjectAlignmentBits; | 154 const intptr_t kObjectAlignment = 1 << kObjectAlignmentBits; |
152 const intptr_t kObjectAlignmentMask = kObjectAlignment - 1; | 155 const intptr_t kObjectAlignmentMask = kObjectAlignment - 1; |
153 | 156 |
154 // Desired alignment for pointers. | 157 // Desired alignment for pointers. |
155 const intptr_t kPointerAlignment = (1 << kPointerSizeLog2); | 158 const intptr_t kPointerAlignment = (1 << kPointerSizeLog2); |
156 const intptr_t kPointerAlignmentMask = kPointerAlignment - 1; | 159 const intptr_t kPointerAlignmentMask = kPointerAlignment - 1; |
157 | 160 |
158 // Desired alignment for maps. | 161 // Desired alignment for maps. |
159 #if V8_HOST_ARCH_64_BIT | 162 #if V8_HOST_ARCH_64_BIT |
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603 CMOV = 15, // x86 | 606 CMOV = 15, // x86 |
604 RDTSC = 4, // x86 | 607 RDTSC = 4, // x86 |
605 CPUID = 10, // x86 | 608 CPUID = 10, // x86 |
606 VFP3 = 1, // ARM | 609 VFP3 = 1, // ARM |
607 ARMv7 = 2, // ARM | 610 ARMv7 = 2, // ARM |
608 SAHF = 0}; // x86 | 611 SAHF = 0}; // x86 |
609 | 612 |
610 } } // namespace v8::internal | 613 } } // namespace v8::internal |
611 | 614 |
612 #endif // V8_GLOBALS_H_ | 615 #endif // V8_GLOBALS_H_ |
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