OLD | NEW |
---|---|
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 |
(...skipping 1145 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
1156 Object* HeapNumberToBoolean(); | 1156 Object* HeapNumberToBoolean(); |
1157 void HeapNumberPrint(); | 1157 void HeapNumberPrint(); |
1158 void HeapNumberPrint(StringStream* accumulator); | 1158 void HeapNumberPrint(StringStream* accumulator); |
1159 #ifdef DEBUG | 1159 #ifdef DEBUG |
1160 void HeapNumberVerify(); | 1160 void HeapNumberVerify(); |
1161 #endif | 1161 #endif |
1162 | 1162 |
1163 // Layout description. | 1163 // Layout description. |
1164 static const int kValueOffset = HeapObject::kHeaderSize; | 1164 static const int kValueOffset = HeapObject::kHeaderSize; |
1165 // IEEE doubles are two 32 bit words. The first is just mantissa, the second | 1165 // IEEE doubles are two 32 bit words. The first is just mantissa, the second |
1166 // is a mixture of sign, exponent and mantissa. This is the ordering on a | 1166 // is a mixture of sign, exponent and mantissa. Our current platforms are all |
1167 // little endian machine with little endian double word ordering. | 1167 // little endian apart from non-EABI arm which is little endian with big |
1168 // endian floating point word ordering! | |
1169 #if !defined(V8_HOST_ARCH_ARM) || __ARM_EABI__ | |
1168 static const int kMantissaOffset = kValueOffset; | 1170 static const int kMantissaOffset = kValueOffset; |
1169 static const int kExponentOffset = kValueOffset + 4; | 1171 static const int kExponentOffset = kValueOffset + 4; |
1172 #else | |
1173 static const int kMantissaOffset = kValueOffset + 4; | |
1174 static const int kExponentOffset = kValueOffset; | |
1175 # define BIG_ENDIAN_FLOATING_POINT | |
iposva
2009/06/10 16:22:28
Please define BIG_ENDIAN_FLOATING_POINT to carry a
| |
1176 #endif | |
1170 static const int kSize = kValueOffset + kDoubleSize; | 1177 static const int kSize = kValueOffset + kDoubleSize; |
1171 | 1178 |
1172 static const uint32_t kSignMask = 0x80000000u; | 1179 static const uint32_t kSignMask = 0x80000000u; |
1173 static const uint32_t kExponentMask = 0x7ff00000u; | 1180 static const uint32_t kExponentMask = 0x7ff00000u; |
1174 static const uint32_t kMantissaMask = 0xfffffu; | 1181 static const uint32_t kMantissaMask = 0xfffffu; |
1175 static const int kExponentBias = 1023; | 1182 static const int kExponentBias = 1023; |
1176 static const int kExponentShift = 20; | 1183 static const int kExponentShift = 20; |
1177 static const int kMantissaBitsInTopWord = 20; | 1184 static const int kMantissaBitsInTopWord = 20; |
1178 static const int kNonMantissaBitsInTopWord = 12; | 1185 static const int kNonMantissaBitsInTopWord = 12; |
1179 | 1186 |
(...skipping 3280 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
4460 } else { | 4467 } else { |
4461 value &= ~(1 << bit_position); | 4468 value &= ~(1 << bit_position); |
4462 } | 4469 } |
4463 return value; | 4470 return value; |
4464 } | 4471 } |
4465 }; | 4472 }; |
4466 | 4473 |
4467 } } // namespace v8::internal | 4474 } } // namespace v8::internal |
4468 | 4475 |
4469 #endif // V8_OBJECTS_H_ | 4476 #endif // V8_OBJECTS_H_ |
OLD | NEW |