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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef RUNTIME_PLATFORM_UTILS_WIN_H_ | 5 #ifndef RUNTIME_PLATFORM_UTILS_WIN_H_ |
| 6 #define RUNTIME_PLATFORM_UTILS_WIN_H_ | 6 #define RUNTIME_PLATFORM_UTILS_WIN_H_ |
| 7 | 7 |
| 8 #include <intrin.h> | 8 #include <intrin.h> |
| 9 #include <stdlib.h> | 9 #include <stdlib.h> |
| 10 | 10 |
| 11 namespace dart { | 11 namespace dart { |
| 12 | 12 |
| 13 inline int Utils::CountLeadingZeros(uword x) { | 13 inline int Utils::CountLeadingZeros(uword x) { |
| 14 unsigned long position; // NOLINT | 14 unsigned long position; // NOLINT |
| 15 #if defined(ARCH_IS_32_BIT) | 15 #if defined(ARCH_IS_32_BIT) |
| 16 _BitScanReverse(&position, x); | 16 _BitScanReverse(&position, x); |
| 17 #elif defined(ARCH_IS_64_BIT) | 17 #elif defined(ARCH_IS_64_BIT) |
| 18 _BitScanReverse64(&position, x); | 18 _BitScanReverse64(&position, x); |
| 19 #else | 19 #else |
| 20 #error Architecture is not 32-bit or 64-bit. | 20 #error Architecture is not 32-bit or 64-bit. |
| 21 #endif | 21 #endif |
| 22 return kBitsPerWord - static_cast<int>(position) - 1; | 22 return kBitsPerWord - static_cast<int>(position) - 1; |
| 23 } | 23 } |
| 24 | 24 |
| 25 | |
| 26 inline int Utils::CountTrailingZeros(uword x) { | 25 inline int Utils::CountTrailingZeros(uword x) { |
| 27 unsigned long result; // NOLINT | 26 unsigned long result; // NOLINT |
| 28 #if defined(ARCH_IS_32_BIT) | 27 #if defined(ARCH_IS_32_BIT) |
| 29 _BitScanForward(&result, x); | 28 _BitScanForward(&result, x); |
| 30 #elif defined(ARCH_IS_64_BIT) | 29 #elif defined(ARCH_IS_64_BIT) |
| 31 _BitScanForward64(&result, x); | 30 _BitScanForward64(&result, x); |
| 32 #else | 31 #else |
| 33 #error Architecture is not 32-bit or 64-bit. | 32 #error Architecture is not 32-bit or 64-bit. |
| 34 #endif | 33 #endif |
| 35 return static_cast<int>(result); | 34 return static_cast<int>(result); |
| 36 } | 35 } |
| 37 | 36 |
| 38 | |
| 39 inline uint16_t Utils::HostToBigEndian16(uint16_t value) { | 37 inline uint16_t Utils::HostToBigEndian16(uint16_t value) { |
| 40 return _byteswap_ushort(value); | 38 return _byteswap_ushort(value); |
| 41 } | 39 } |
| 42 | 40 |
| 43 | |
| 44 inline uint32_t Utils::HostToBigEndian32(uint32_t value) { | 41 inline uint32_t Utils::HostToBigEndian32(uint32_t value) { |
| 45 return _byteswap_ulong(value); | 42 return _byteswap_ulong(value); |
| 46 } | 43 } |
| 47 | 44 |
| 48 | |
| 49 inline uint64_t Utils::HostToBigEndian64(uint64_t value) { | 45 inline uint64_t Utils::HostToBigEndian64(uint64_t value) { |
| 50 return _byteswap_uint64(value); | 46 return _byteswap_uint64(value); |
| 51 } | 47 } |
| 52 | 48 |
| 53 | |
| 54 inline uint16_t Utils::HostToLittleEndian16(uint16_t value) { | 49 inline uint16_t Utils::HostToLittleEndian16(uint16_t value) { |
| 55 return value; | 50 return value; |
| 56 } | 51 } |
| 57 | 52 |
| 58 | |
| 59 inline uint32_t Utils::HostToLittleEndian32(uint32_t value) { | 53 inline uint32_t Utils::HostToLittleEndian32(uint32_t value) { |
| 60 return value; | 54 return value; |
| 61 } | 55 } |
| 62 | 56 |
| 63 | |
| 64 inline uint64_t Utils::HostToLittleEndian64(uint64_t value) { | 57 inline uint64_t Utils::HostToLittleEndian64(uint64_t value) { |
| 65 return value; | 58 return value; |
| 66 } | 59 } |
| 67 | 60 |
| 68 } // namespace dart | 61 } // namespace dart |
| 69 | 62 |
| 70 #endif // RUNTIME_PLATFORM_UTILS_WIN_H_ | 63 #endif // RUNTIME_PLATFORM_UTILS_WIN_H_ |
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