text: /*!The Treasure Box Library
   *
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   * 
   * Copyright (C) 2009 - 2017, TBOOX Open Source Group.
   *
   * @author      ruki
   * @file        bits_gcc.h
   *
   */
  #ifndef TB_UTILS_IMPL_BITS_GCC_H
  #define TB_UTILS_IMPL_BITS_GCC_H
  
  /* //////////////////////////////////////////////////////////////////////////////////////
   * includes
   */
  #include "prefix.h"
  
  /* //////////////////////////////////////////////////////////////////////////////////////
   * macros
   */
  // swap 
  #if TB_COMPILER_VERSION_BE(4, 3)
  #   define tb_bits_swap_u32(x)      __builtin_bswap32(x)
  #   define tb_bits_swap_u64(x)      __builtin_bswap64(x)
  #endif
  
  // cl0
  #if TB_COMPILER_VERSION_BE(4, 1)
  #   define tb_bits_cl0_u32_be(x)    ((x)? (tb_size_t)__builtin_clz((tb_uint32_t)(x)) : 32)
  #   define tb_bits_cl0_u32_le(x)    ((x)? (tb_size_t)__builtin_ctz((tb_uint32_t)(x)) : 32)
  #   define tb_bits_cl0_u64_be(x)    ((x)? (tb_size_t)__builtin_clzll((tb_uint64_t)(x)) : 64)
  #   define tb_bits_cl0_u64_le(x)    ((x)? (tb_size_t)__builtin_ctzll((tb_uint64_t)(x)) : 64)
  #endif
  
  // cb1
  #if TB_COMPILER_VERSION_BE(4, 1)
  #   define tb_bits_cb1_u32(x)       ((x)? (tb_size_t)__builtin_popcount((tb_uint32_t)(x)) : 0)
  #   define tb_bits_cb1_u64(x)       ((x)? (tb_size_t)__builtin_popcountll((tb_uint64_t)(x)) : 0)
  #endif
  
  // fb1
  #if TB_COMPILER_VERSION_BE(4, 1)
  #   define tb_bits_fb1_u32_le(x)    ((x)? (tb_size_t)__builtin_ffs((tb_uint32_t)(x)) - 1 : 32)
  #   define tb_bits_fb1_u64_le(x)    ((x)? (tb_size_t)__builtin_ffsll((tb_uint64_t)(x)) - 1 : 64)
  #endif
  
  #endif 
  
  
  