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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_CONVERSIONS_INL_H_ | 5 #ifndef V8_CONVERSIONS_INL_H_ |
6 #define V8_CONVERSIONS_INL_H_ | 6 #define V8_CONVERSIONS_INL_H_ |
7 | 7 |
8 #include <limits.h> // Required for INT_MAX etc. | 8 #include <limits.h> // Required for INT_MAX etc. |
9 #include <float.h> // Required for DBL_MAX and on Win32 for finite() | 9 #include <float.h> // Required for DBL_MAX and on Win32 for finite() |
10 #include <stdarg.h> | 10 #include <stdarg.h> |
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51 } | 51 } |
52 if (x < k2Pow52) { | 52 if (x < k2Pow52) { |
53 x += k2Pow52; | 53 x += k2Pow52; |
54 uint32_t result; | 54 uint32_t result; |
55 #ifndef V8_TARGET_BIG_ENDIAN | 55 #ifndef V8_TARGET_BIG_ENDIAN |
56 Address mantissa_ptr = reinterpret_cast<Address>(&x); | 56 Address mantissa_ptr = reinterpret_cast<Address>(&x); |
57 #else | 57 #else |
58 Address mantissa_ptr = reinterpret_cast<Address>(&x) + kIntSize; | 58 Address mantissa_ptr = reinterpret_cast<Address>(&x) + kIntSize; |
59 #endif | 59 #endif |
60 // Copy least significant 32 bits of mantissa. | 60 // Copy least significant 32 bits of mantissa. |
61 MemCopy(&result, mantissa_ptr, sizeof(result)); | 61 memcpy(&result, mantissa_ptr, sizeof(result)); |
62 return negative ? ~result + 1 : result; | 62 return negative ? ~result + 1 : result; |
63 } | 63 } |
64 // Large number (outside uint32 range), Infinity or NaN. | 64 // Large number (outside uint32 range), Infinity or NaN. |
65 return 0x80000000u; // Return integer indefinite. | 65 return 0x80000000u; // Return integer indefinite. |
66 } | 66 } |
67 | 67 |
68 | 68 |
69 inline double DoubleToInteger(double x) { | 69 inline double DoubleToInteger(double x) { |
70 if (std::isnan(x)) return 0; | 70 if (std::isnan(x)) return 0; |
71 if (!std::isfinite(x) || x == 0) return x; | 71 if (!std::isfinite(x) || x == 0) return x; |
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676 SLOW_ASSERT(buffer_pos < kBufferSize); | 676 SLOW_ASSERT(buffer_pos < kBufferSize); |
677 buffer[buffer_pos] = '\0'; | 677 buffer[buffer_pos] = '\0'; |
678 | 678 |
679 double converted = Strtod(Vector<const char>(buffer, buffer_pos), exponent); | 679 double converted = Strtod(Vector<const char>(buffer, buffer_pos), exponent); |
680 return (sign == NEGATIVE) ? -converted : converted; | 680 return (sign == NEGATIVE) ? -converted : converted; |
681 } | 681 } |
682 | 682 |
683 } } // namespace v8::internal | 683 } } // namespace v8::internal |
684 | 684 |
685 #endif // V8_CONVERSIONS_INL_H_ | 685 #endif // V8_CONVERSIONS_INL_H_ |
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