libc/src/stdbit/stdc_leading_zeros_ull.cpp

   1 //===-- Implementation of stdc_leading_zeros_ull --------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/stdbit/stdc_leading_zeros_ull.h"
  10
  11 #include "src/__support/CPP/bit.h"
  12 #include "src/__support/common.h"
  13 #include "src/__support/macros/config.h"
  14
  15 namespace LIBC_NAMESPACE_DECL {
  16
  17 LLVM_LIBC_FUNCTION(unsigned, stdc_leading_zeros_ull,
  18                    (unsigned long long value)) {
  19   return static_cast<unsigned>(cpp::countl_zero(value));
  20 }
  21
  22 } // namespace LIBC_NAMESPACE_DECL