uip-arch.c

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/**
 * \addtogroup mbxxx-platform
 *
 * @{
 */

/*
 * Copyright (c) 2010, STMicroelectronics.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided
 *    with the distribution.
 * 3. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */

/**
* \file
*                       uip-arch.c
* \author
*                       Salvatore Pitrulli <salvopitru@users.sourceforge.net>
*/

#include "net/ip/uip.h"
#include "net/ip/uip_arch.h"

#if UIP_TCP
void
uip_add32(uint8_t * op32, uint16_t op16)
{
  uint32_t op32_align, uip_acc32_align;
  
  op32_align =
      ((uint32_t) op32[0]) << 24 | ((uint32_t) op32[1]) << 16 |
      ((uint16_t) op32[2]) << 8 | op32[3];

  uip_acc32_align = op32_align + op16;
  uip_acc32[3] = uip_acc32_align;
  uip_acc32[2] = uip_acc32_align >> 8;
  uip_acc32[1] = uip_acc32_align >> 16;
  uip_acc32[0] = uip_acc32_align >> 24;
}
#endif
/*-----------------------------------------------------------------------------------*/
/** @} */