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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 PLATFORM_UTILS_LINUX_H_ | 5 #ifndef PLATFORM_UTILS_LINUX_H_ |
6 #define PLATFORM_UTILS_LINUX_H_ | 6 #define PLATFORM_UTILS_LINUX_H_ |
7 | 7 |
8 namespace dart { | 8 namespace dart { |
9 | 9 |
10 inline int Utils::CountTrailingZeros(uint32_t x) { | 10 inline int Utils::CountTrailingZeros(uword x) { |
| 11 #if defined(ARCH_IS_32_BIT) |
11 return __builtin_ctzl(x); | 12 return __builtin_ctzl(x); |
12 }; | 13 #elif defined(ARCH_IS_64_BIT) |
13 | |
14 inline int Utils::CountTrailingZeros(uint64_t x) { | |
15 return __builtin_ctzll(x); | 14 return __builtin_ctzll(x); |
| 15 #else |
| 16 #error Architecture is not 32-bit or 64-bit. |
| 17 #endif |
16 }; | 18 }; |
17 | 19 |
18 } // namespace dart | 20 } // namespace dart |
19 | 21 |
20 #endif // PLATFORM_UTILS_LINUX_H_ | 22 #endif // PLATFORM_UTILS_LINUX_H_ |
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