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Issue 6822025: ARM: Remove support for ABI prior to EABI (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Review comments addresses Created 9 years, 8 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 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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1286 1286
1287 inline int get_exponent(); 1287 inline int get_exponent();
1288 inline int get_sign(); 1288 inline int get_sign();
1289 1289
1290 // Layout description. 1290 // Layout description.
1291 static const int kValueOffset = HeapObject::kHeaderSize; 1291 static const int kValueOffset = HeapObject::kHeaderSize;
1292 // IEEE doubles are two 32 bit words. The first is just mantissa, the second 1292 // IEEE doubles are two 32 bit words. The first is just mantissa, the second
1293 // is a mixture of sign, exponent and mantissa. Our current platforms are all 1293 // is a mixture of sign, exponent and mantissa. Our current platforms are all
1294 // little endian apart from non-EABI arm which is little endian with big 1294 // little endian apart from non-EABI arm which is little endian with big
1295 // endian floating point word ordering! 1295 // endian floating point word ordering!
1296 #if !defined(V8_HOST_ARCH_ARM) || defined(USE_ARM_EABI)
1297 static const int kMantissaOffset = kValueOffset; 1296 static const int kMantissaOffset = kValueOffset;
1298 static const int kExponentOffset = kValueOffset + 4; 1297 static const int kExponentOffset = kValueOffset + 4;
1299 #else 1298
1300 static const int kMantissaOffset = kValueOffset + 4;
1301 static const int kExponentOffset = kValueOffset;
1302 # define BIG_ENDIAN_FLOATING_POINT 1
1303 #endif
1304 static const int kSize = kValueOffset + kDoubleSize; 1299 static const int kSize = kValueOffset + kDoubleSize;
1305 static const uint32_t kSignMask = 0x80000000u; 1300 static const uint32_t kSignMask = 0x80000000u;
1306 static const uint32_t kExponentMask = 0x7ff00000u; 1301 static const uint32_t kExponentMask = 0x7ff00000u;
1307 static const uint32_t kMantissaMask = 0xfffffu; 1302 static const uint32_t kMantissaMask = 0xfffffu;
1308 static const int kMantissaBits = 52; 1303 static const int kMantissaBits = 52;
1309 static const int kExponentBits = 11; 1304 static const int kExponentBits = 11;
1310 static const int kExponentBias = 1023; 1305 static const int kExponentBias = 1023;
1311 static const int kExponentShift = 20; 1306 static const int kExponentShift = 20;
1312 static const int kMantissaBitsInTopWord = 20; 1307 static const int kMantissaBitsInTopWord = 20;
1313 static const int kNonMantissaBitsInTopWord = 12; 1308 static const int kNonMantissaBitsInTopWord = 12;
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6653 } else { 6648 } else {
6654 value &= ~(1 << bit_position); 6649 value &= ~(1 << bit_position);
6655 } 6650 }
6656 return value; 6651 return value;
6657 } 6652 }
6658 }; 6653 };
6659 6654
6660 } } // namespace v8::internal 6655 } } // namespace v8::internal
6661 6656
6662 #endif // V8_OBJECTS_H_ 6657 #endif // V8_OBJECTS_H_
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