mirror of
https://github.com/dart-lang/sdk
synced 2024-11-05 18:22:09 +00:00
2f9f822c76
Review URL: https://chromiumcodereview.appspot.com//10818020 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@9838 260f80e4-7a28-3924-810f-c04153c831b5
26 lines
674 B
C++
26 lines
674 B
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
|
|
// for details. All rights reserved. Use of this source code is governed by a
|
|
// BSD-style license that can be found in the LICENSE file.
|
|
|
|
#ifndef PLATFORM_UTILS_WIN_H_
|
|
#define PLATFORM_UTILS_WIN_H_
|
|
|
|
#include <intrin.h>
|
|
|
|
namespace dart {
|
|
|
|
inline int Utils::CountTrailingZeros(uword x) {
|
|
unsigned long result; // NOLINT
|
|
#if defined(ARCH_IS_32_BIT)
|
|
_BitScanReverse(&result, x);
|
|
#elif defined(ARCH_IS_64_BIT)
|
|
_BitScanReverse64(&result, x);
|
|
#else
|
|
#error Architecture is not 32-bit or 64-bit.
|
|
#endif
|
|
return static_cast<int>(result);
|
|
};
|
|
|
|
} // namespace dart
|
|
|
|
#endif // PLATFORM_UTILS_WIN_H_
|