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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 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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378 kDoublePrecision = 1 | 378 kDoublePrecision = 1 |
379 }; | 379 }; |
380 | 380 |
381 | 381 |
382 // VFP FPSCR constants. | 382 // VFP FPSCR constants. |
383 enum VFPConversionMode { | 383 enum VFPConversionMode { |
384 kFPSCRRounding = 0, | 384 kFPSCRRounding = 0, |
385 kDefaultRoundToZero = 1 | 385 kDefaultRoundToZero = 1 |
386 }; | 386 }; |
387 | 387 |
| 388 // This mask does not include the "inexact" or "input denormal" cumulative |
| 389 // exceptions flags, because we usually don't want to check for it. |
388 static const uint32_t kVFPExceptionMask = 0xf; | 390 static const uint32_t kVFPExceptionMask = 0xf; |
| 391 static const uint32_t kVFPInexactExceptionBit = 1 << 4; |
389 static const uint32_t kVFPFlushToZeroMask = 1 << 24; | 392 static const uint32_t kVFPFlushToZeroMask = 1 << 24; |
390 static const uint32_t kVFPInvalidExceptionBit = 1; | 393 static const uint32_t kVFPInvalidExceptionBit = 1; |
391 | 394 |
392 static const uint32_t kVFPNConditionFlagBit = 1 << 31; | 395 static const uint32_t kVFPNConditionFlagBit = 1 << 31; |
393 static const uint32_t kVFPZConditionFlagBit = 1 << 30; | 396 static const uint32_t kVFPZConditionFlagBit = 1 << 30; |
394 static const uint32_t kVFPCConditionFlagBit = 1 << 29; | 397 static const uint32_t kVFPCConditionFlagBit = 1 << 29; |
395 static const uint32_t kVFPVConditionFlagBit = 1 << 28; | 398 static const uint32_t kVFPVConditionFlagBit = 1 << 28; |
396 | 399 |
397 | 400 |
398 // VFP rounding modes. See ARM DDI 0406B Page A2-29. | 401 // VFP rounding modes. See ARM DDI 0406B Page A2-29. |
399 enum VFPRoundingMode { | 402 enum VFPRoundingMode { |
400 RN = 0 << 22, // Round to Nearest. | 403 RN = 0 << 22, // Round to Nearest. |
401 RP = 1 << 22, // Round towards Plus Infinity. | 404 RP = 1 << 22, // Round towards Plus Infinity. |
402 RM = 2 << 22, // Round towards Minus Infinity. | 405 RM = 2 << 22, // Round towards Minus Infinity. |
403 RZ = 3 << 22, // Round towards zero. | 406 RZ = 3 << 22, // Round towards zero. |
404 | 407 |
405 // Aliases. | 408 // Aliases. |
406 kRoundToNearest = RN, | 409 kRoundToNearest = RN, |
407 kRoundToPlusInf = RP, | 410 kRoundToPlusInf = RP, |
408 kRoundToMinusInf = RM, | 411 kRoundToMinusInf = RM, |
409 kRoundToZero = RZ | 412 kRoundToZero = RZ |
410 }; | 413 }; |
411 | 414 |
412 static const uint32_t kVFPRoundingModeMask = 3 << 22; | 415 static const uint32_t kVFPRoundingModeMask = 3 << 22; |
413 | 416 |
| 417 enum CheckForInexactConversion { |
| 418 kCheckForInexactConversion, |
| 419 kDontCheckForInexactConversion |
| 420 }; |
| 421 |
414 // ----------------------------------------------------------------------------- | 422 // ----------------------------------------------------------------------------- |
415 // Hints. | 423 // Hints. |
416 | 424 |
417 // Branch hints are not used on the ARM. They are defined so that they can | 425 // Branch hints are not used on the ARM. They are defined so that they can |
418 // appear in shared function signatures, but will be ignored in ARM | 426 // appear in shared function signatures, but will be ignored in ARM |
419 // implementations. | 427 // implementations. |
420 enum Hint { no_hint }; | 428 enum Hint { no_hint }; |
421 | 429 |
422 // Hints are not used on the arm. Negating is trivial. | 430 // Hints are not used on the arm. Negating is trivial. |
423 inline Hint NegateHint(Hint ignored) { return no_hint; } | 431 inline Hint NegateHint(Hint ignored) { return no_hint; } |
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752 static int Number(const char* name, bool* is_double); | 760 static int Number(const char* name, bool* is_double); |
753 | 761 |
754 private: | 762 private: |
755 static const char* names_[kNumVFPRegisters]; | 763 static const char* names_[kNumVFPRegisters]; |
756 }; | 764 }; |
757 | 765 |
758 | 766 |
759 } } // namespace v8::internal | 767 } } // namespace v8::internal |
760 | 768 |
761 #endif // V8_ARM_CONSTANTS_ARM_H_ | 769 #endif // V8_ARM_CONSTANTS_ARM_H_ |
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