/*******************************************************************************
    OpenAirInterface
    Copyright(c) 1999 - 2014 Eurecom

    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.


    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with OpenAirInterface.The full GNU General Public License is
   included in this distribution in the file called "COPYING". If not,
   see <http://www.gnu.org/licenses/>.

  Contact Information
  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@eurecom.fr

  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE

 *******************************************************************************/
#include "PHY/sse_intrin.h"

void Zero_Buffer(void *buf,unsigned int length)
{
  // zeroes the mmx_t buffer 'buf' starting from buf[0] to buf[length-1] in bytes
  int i;
  register __m64 mm0;
  __m64 *mbuf = (__m64 *)buf;

  //  length>>=3;                    // put length in quadwords
  mm0 = _m_pxor(mm0,mm0);         // clear the register

  for(i=0; i<length>>3; i++)     // for each i
    mbuf[i] = mm0;                // put 0 in buf[i]

  _mm_empty();
}

void mmxcopy(void *dest,void *src,int size)
{

  // copy size bytes from src to dest
  register int i;
  register __m64 mm0;
  __m64 *mmsrc = (__m64 *)src, *mmdest= (__m64 *)dest;



  for (i=0; i<size>>3; i++) {
    mm0 = mmsrc[i];
    mmdest[i] = mm0;
  }

  _mm_empty();
}

void Zero_Buffer_nommx(void *buf,unsigned int length)
{

  int i;

  for (i=0; i<length>>2; i++)
    ((int *)buf)[i] = 0;

}