upstream/emscripten/system/lib/llvm-libc/src/strings/ffs.cpp

//===-- Implementation of ffs ---------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "src/strings/ffs.h"
#include "src/__support/common.h"
#include "src/__support/macros/config.h"
#include "src/__support/math_extras.h"

namespace LIBC_NAMESPACE_DECL {

LLVM_LIBC_FUNCTION(int, ffs, (int i)) {
  return first_trailing_one(static_cast<unsigned>(i));
}

} // namespace LIBC_NAMESPACE_DECL