| Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/base/bits.h" |
| 6 | #include "src/base/logging.h" |
| 7 | |
| 8 | namespace v8 { |
| 9 | namespace base { |
| 10 | namespace bits { |
| 11 | |
| 12 | uint32_t RoundUpToPowerOfTwo32(uint32_t value) { |
| 13 | DCHECK_LE(value, 0x80000000u); |
| 14 | value = value - 1; |
| 15 | value = value | (value >> 1); |
| 16 | value = value | (value >> 2); |
| 17 | value = value | (value >> 4); |
| 18 | value = value | (value >> 8); |
| 19 | value = value | (value >> 16); |
| 20 | return value + 1; |
| 21 | } |
| 22 | |
| 23 | } // namespace bits |
| 24 | } // namespace base |
| 25 | } // namespace v8 |