3gpplte_turbo_decoder_sse_8bit.c 58.5 KB
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/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
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 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
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 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * 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.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

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/* file: 3gpplte_turbo_decoder_sse.c
   purpose: Routines for implementing max-logmap decoding of Turbo-coded (DLSCH) transport channels from 36-212, V8.6 2009-03
   authors: raymond.knopp@eurecom.fr, Laurent Thomas (Alcatel-Lucent)
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   date: 21.10.2009
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   Note: This routine currently requires SSE2,SSSE3 and SSE4.1 equipped computers.  It uses 16-bit inputs for LLRs and 8-bit arithmetic for internal computations!
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   Changelog: 17.11.2009 FK SSE4.1 not required anymore
   Aug. 2012 new parallelization options for higher speed (8-way parallelization)
   Jan. 2013 8-bit LLR support with 16-way parallelization
   Feb. 2013 New interleaving and hard-decision optimizations (L. Thomas)
   May 2013 Extracted 8-bit code
*/

///
///

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#include "PHY/sse_intrin.h"
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#ifndef TEST_DEBUG
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#include "PHY/defs.h"
#include "PHY/CODING/defs.h"
#include "PHY/CODING/lte_interleaver_inline.h"
#include "extern_3GPPinterleaver.h"
#else

#include "defs.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#endif

#ifdef MEX
#include "mex.h"
#endif

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#include "common/ran_context.h"

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#define SHUFFLE16(a,b,c,d,e,f,g,h) _mm_set_epi8(h==-1?-1:h*2+1, \
            h==-1?-1:h*2, \
            g==-1?-1:g*2+1, \
            g==-1?-1:g*2, \
            f==-1?-1:f*2+1, \
            f==-1?-1:f*2, \
            e==-1?-1:e*2+1, \
            e==-1?-1:e*2, \
            d==-1?-1:d*2+1, \
            d==-1?-1:d*2, \
            c==-1?-1:c*2+1, \
            c==-1?-1:c*2, \
            b==-1?-1:b*2+1, \
            b==-1?-1:b*2, \
            a==-1?-1:a*2+1, \
            a==-1?-1:a*2);
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//#define DEBUG_LOGMAP

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typedef int8_t llr_t; // internal decoder LLR data is 8-bit fixed
typedef int8_t channel_t;
#define MAX8 127


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void log_map8(llr_t* systematic,channel_t* y_parity, llr_t* m11, llr_t* m10, llr_t *alpha, llr_t *beta, llr_t* ext,unsigned short frame_length,unsigned char term_flag,unsigned char F,int offset8_flag,
              time_stats_t *alpha_stats,time_stats_t *beta_stats,time_stats_t *gamma_stats,time_stats_t *ext_stats);
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void compute_gamma8(llr_t* m11,llr_t* m10,llr_t* systematic, channel_t* y_parity, unsigned short frame_length,unsigned char term_flag);
void compute_alpha8(llr_t*alpha,llr_t *beta, llr_t* m11,llr_t* m10, unsigned short frame_length,unsigned char F);
void compute_beta8(llr_t*alpha, llr_t* beta,llr_t* m11,llr_t* m10, unsigned short frame_length,unsigned char F,int offset8_flag);
void compute_ext8(llr_t* alpha,llr_t* beta,llr_t* m11,llr_t* m10,llr_t* extrinsic, llr_t* ap, unsigned short frame_length);


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void print_bytes(char *s, int8_t *x)
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{
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  printf("%s  : %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d\n",s,
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         x[0],x[1],x[2],x[3],x[4],x[5],x[6],x[7],
         x[8],x[9],x[10],x[11],x[12],x[13],x[14],x[15]);
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}


void log_map8(llr_t* systematic,
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              channel_t* y_parity,
              llr_t* m11,
              llr_t* m10,
              llr_t *alpha,
              llr_t *beta,
              llr_t* ext,
              unsigned short frame_length,
              unsigned char term_flag,
              unsigned char F,
              int offset8_flag,
              time_stats_t *alpha_stats,
              time_stats_t *beta_stats,
              time_stats_t *gamma_stats,
              time_stats_t *ext_stats)
{
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#ifdef DEBUG_LOGMAP
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  printf("log_map, frame_length %d\n",frame_length);
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#endif

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  if (gamma_stats) start_meas(gamma_stats) ;
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  compute_gamma8(m11,m10,systematic,y_parity,frame_length,term_flag) ;
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  if (gamma_stats) stop_meas(gamma_stats);
  if (alpha_stats) start_meas(alpha_stats) ;
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  compute_alpha8(alpha,beta,m11,m10,frame_length,F)                  ;
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  if (alpha_stats) stop_meas(alpha_stats);
  if (beta_stats) start_meas(beta_stats)  ;
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  compute_beta8(alpha,beta,m11,m10,frame_length,F,offset8_flag)      ;
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  if (beta_stats) stop_meas(beta_stats);
  if (ext_stats) start_meas(ext_stats)   ;
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  compute_ext8(alpha,beta,m11,m10,ext,systematic,frame_length)       ;
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  if (ext_stats) stop_meas(ext_stats);
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}

void compute_gamma8(llr_t* m11,llr_t* m10,llr_t* systematic,channel_t* y_parity,
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                    unsigned short frame_length,unsigned char term_flag)
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{
  int k,K1;
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#if defined(__x86_64__)||defined(__i386__)
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  __m128i *systematic128 = (__m128i *)systematic;
  __m128i *y_parity128   = (__m128i *)y_parity;
  __m128i *m10_128        = (__m128i *)m10;
  __m128i *m11_128        = (__m128i *)m11;
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#elif defined(__arm__)
  int8x16_t *systematic128  = (int8x16_t *)systematic;
  int8x16_t *y_parity128    = (int8x16_t *)y_parity;
  int8x16_t *m10_128        = (int8x16_t *)m10;
  int8x16_t *m11_128        = (int8x16_t *)m11;
#endif
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#ifdef DEBUG_LOGMAP
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  printf("compute_gamma, %p,%p,%p,%p,framelength %d\n",m11,m10,systematic,y_parity,frame_length);
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#endif

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#if defined(__x86_64__) || defined(__i386__)
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  register __m128i sl,sh,ypl,yph; //K128=_mm_set1_epi8(-128);
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#endif
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  K1 = (frame_length>>4);

  for (k=0; k<K1; k++) {
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#if defined(__x86_64__) || defined(__i386__)
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    sl  = _mm_cvtepi8_epi16(systematic128[k]);
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    sh  = _mm_cvtepi8_epi16(_mm_srli_si128(systematic128[k],8));
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    ypl = _mm_cvtepi8_epi16(y_parity128[k]);
    yph = _mm_cvtepi8_epi16(_mm_srli_si128(y_parity128[k],8));
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    m11_128[k] = _mm_packs_epi16(_mm_srai_epi16(_mm_adds_epi16(sl,ypl),1),
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                                 _mm_srai_epi16(_mm_adds_epi16(sh,yph),1));
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    m10_128[k] = _mm_packs_epi16(_mm_srai_epi16(_mm_subs_epi16(sl,ypl),1),
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                                 _mm_srai_epi16(_mm_subs_epi16(sh,yph),1));
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#elif defined(__arm__)
    m11_128[k] = vhaddq_s8(systematic128[k],y_parity128[k]);
    m10_128[k] = vhsubq_s8(systematic128[k],y_parity128[k]);
#endif
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  }
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  // Termination

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#if defined(__x86_64__) || defined(__i386__)
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  sl  = _mm_cvtepi8_epi16(systematic128[k+term_flag]);
  sh = _mm_cvtepi8_epi16(_mm_srli_si128(systematic128[k],8));
  ypl = _mm_cvtepi8_epi16(y_parity128[k+term_flag]);
  yph = _mm_cvtepi8_epi16(_mm_srli_si128(y_parity128[k],8));
  m11_128[k] = _mm_packs_epi16(_mm_srai_epi16(_mm_adds_epi16(sl,ypl),1),
                               _mm_srai_epi16(_mm_adds_epi16(sh,yph),1));
  m10_128[k] = _mm_packs_epi16(_mm_srai_epi16(_mm_subs_epi16(sl,ypl),1),
                               _mm_srai_epi16(_mm_subs_epi16(sh,yph),1));
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#elif defined(__arm__)
  m11_128[k] = vhaddq_s8(systematic128[k+term_flag],y_parity128[k]);
  m10_128[k] = vhsubq_s8(systematic128[k+term_flag],y_parity128[k]);
#endif
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}

#define L 16

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void compute_alpha8(llr_t* alpha,llr_t* beta,llr_t* m_11,llr_t* m_10,unsigned short frame_length,unsigned char F)
{
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  int k,loopval,rerun_flag;
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#if defined(__x86_64__) || defined(__i386__)
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  __m128i *alpha128=(__m128i *)alpha,*alpha_ptr;
  __m128i *m11p,*m10p;
  __m128i m_b0,m_b1,m_b2,m_b3,m_b4,m_b5,m_b6,m_b7;
  __m128i new0,new1,new2,new3,new4,new5,new6,new7;
  __m128i alpha_max;
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#elif defined(__arm__)
  int8x16_t *alpha128=(int8x16_t *)alpha,*alpha_ptr;
  int8x16_t *m11p,*m10p;
  int8x16_t m_b0,m_b1,m_b2,m_b3,m_b4,m_b5,m_b6,m_b7;
  int8x16_t new0,new1,new2,new3,new4,new5,new6,new7;
  int8x16_t alpha_max;
#endif
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  // Set initial state: first colum is known
  // the other columns are unknown, so all states are set to same value
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#if defined(__x86_64__) || defined(__i386__)
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  alpha128[0] = _mm_set_epi8(-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,0);
  alpha128[1] = _mm_set_epi8(-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2);
  alpha128[2] = _mm_set_epi8(-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2);
  alpha128[3] = _mm_set_epi8(-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2);
  alpha128[4] = _mm_set_epi8(-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2);
  alpha128[5] = _mm_set_epi8(-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2);
  alpha128[6] = _mm_set_epi8(-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2);
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  alpha128[7] = _mm_set_epi8(-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2,-MAX8/2);
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  for (loopval=frame_length>>4, rerun_flag=0; rerun_flag<2; loopval=L, rerun_flag++) {
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    alpha_ptr = &alpha128[0];
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    m11p = (__m128i*)m_11;
    m10p = (__m128i*)m_10;
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    for (k=0;  k<loopval;  k++) {
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      m_b0 = _mm_adds_epi8(alpha_ptr[1],*m11p);  // m11
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      m_b4 = _mm_subs_epi8(alpha_ptr[1],*m11p);  // m00=-m11
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      m_b1 = _mm_subs_epi8(alpha_ptr[3],*m10p);  // m01=-m10
      m_b5 = _mm_adds_epi8(alpha_ptr[3],*m10p);  // m10
      m_b2 = _mm_adds_epi8(alpha_ptr[5],*m10p);  // m10
      m_b6 = _mm_subs_epi8(alpha_ptr[5],*m10p);  // m01=-m10
      m_b3 = _mm_subs_epi8(alpha_ptr[7],*m11p);  // m00=-m11
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      m_b7 = _mm_adds_epi8(alpha_ptr[7],*m11p);  // m11

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      new0 = _mm_subs_epi8(alpha_ptr[0],*m11p);  // m00=-m11
      new4 = _mm_adds_epi8(alpha_ptr[0],*m11p);  // m11
      new1 = _mm_adds_epi8(alpha_ptr[2],*m10p);  // m10
      new5 = _mm_subs_epi8(alpha_ptr[2],*m10p);  // m01=-m10
      new2 = _mm_subs_epi8(alpha_ptr[4],*m10p);  // m01=-m10
      new6 = _mm_adds_epi8(alpha_ptr[4],*m10p);  // m10
      new3 = _mm_adds_epi8(alpha_ptr[6],*m11p);  // m11
      new7 = _mm_subs_epi8(alpha_ptr[6],*m11p);  // m00=-m11
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      alpha_ptr += 8;
      m11p++;
      m10p++;
      alpha_ptr[0] = _mm_max_epi8(m_b0,new0);
      alpha_ptr[1] = _mm_max_epi8(m_b1,new1);
      alpha_ptr[2] = _mm_max_epi8(m_b2,new2);
      alpha_ptr[3] = _mm_max_epi8(m_b3,new3);
      alpha_ptr[4] = _mm_max_epi8(m_b4,new4);
      alpha_ptr[5] = _mm_max_epi8(m_b5,new5);
      alpha_ptr[6] = _mm_max_epi8(m_b6,new6);
      alpha_ptr[7] = _mm_max_epi8(m_b7,new7);
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      // compute and subtract maxima
      alpha_max = _mm_max_epi8(alpha_ptr[0],alpha_ptr[1]);
      alpha_max = _mm_max_epi8(alpha_max,alpha_ptr[2]);
      alpha_max = _mm_max_epi8(alpha_max,alpha_ptr[3]);
      alpha_max = _mm_max_epi8(alpha_max,alpha_ptr[4]);
      alpha_max = _mm_max_epi8(alpha_max,alpha_ptr[5]);
      alpha_max = _mm_max_epi8(alpha_max,alpha_ptr[6]);
      alpha_max = _mm_max_epi8(alpha_max,alpha_ptr[7]);

      alpha_ptr[0] = _mm_subs_epi8(alpha_ptr[0],alpha_max);
      alpha_ptr[1] = _mm_subs_epi8(alpha_ptr[1],alpha_max);
      alpha_ptr[2] = _mm_subs_epi8(alpha_ptr[2],alpha_max);
      alpha_ptr[3] = _mm_subs_epi8(alpha_ptr[3],alpha_max);
      alpha_ptr[4] = _mm_subs_epi8(alpha_ptr[4],alpha_max);
      alpha_ptr[5] = _mm_subs_epi8(alpha_ptr[5],alpha_max);
      alpha_ptr[6] = _mm_subs_epi8(alpha_ptr[6],alpha_max);
      alpha_ptr[7] = _mm_subs_epi8(alpha_ptr[7],alpha_max);
    }

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    // Set intial state for next iteration from the last state
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    // as acolum end states are the first states of the next column
    int K1= frame_length>>1;
    alpha128[0] = _mm_slli_si128(alpha128[K1],1);
    alpha128[1] = _mm_slli_si128(alpha128[1+K1],1);
    alpha128[2] = _mm_slli_si128(alpha128[2+K1],1);
    alpha128[3] = _mm_slli_si128(alpha128[3+K1],1);
    alpha128[4] = _mm_slli_si128(alpha128[4+K1],1);
    alpha128[5] = _mm_slli_si128(alpha128[5+K1],1);
    alpha128[6] = _mm_slli_si128(alpha128[6+K1],1);
    alpha128[7] = _mm_slli_si128(alpha128[7+K1],1);
    alpha[16] =  -MAX8/2;
    alpha[32] = -MAX8/2;
    alpha[48] = -MAX8/2;
    alpha[64] = -MAX8/2;
    alpha[80] = -MAX8/2;
    alpha[96] = -MAX8/2;
    alpha[112] = -MAX8/2;

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  }
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#elif defined(__arm__)
  alpha128[0] = vdupq_n_s8(-MAX8/2);
  alpha128[0] = vsetq_lane_s8(0,alpha128[0],0);
  alpha128[1] = vdupq_n_s8(-MAX8/2);
  alpha128[2] = vdupq_n_s8(-MAX8/2);
  alpha128[3] = vdupq_n_s8(-MAX8/2);
  alpha128[4] = vdupq_n_s8(-MAX8/2);
  alpha128[5] = vdupq_n_s8(-MAX8/2);
  alpha128[6] = vdupq_n_s8(-MAX8/2);
  alpha128[7] = vdupq_n_s8(-MAX8/2);
  for (loopval=frame_length>>4, rerun_flag=0; rerun_flag<2; loopval=L, rerun_flag++) {

    alpha_ptr = &alpha128[0];

    m11p = (int8x16_t*)m_11;
    m10p = (int8x16_t*)m_10;

    for (k=0;  k<loopval;  k++) {
      m_b0 = vqaddq_s8(alpha_ptr[1],*m11p);  // m11
      m_b4 = vqsubq_s8(alpha_ptr[1],*m11p);  // m00=-m11
      m_b1 = vqsubq_s8(alpha_ptr[3],*m10p);  // m01=-m10
      m_b5 = vqaddq_s8(alpha_ptr[3],*m10p);  // m10
      m_b2 = vqaddq_s8(alpha_ptr[5],*m10p);  // m10
      m_b6 = vqsubq_s8(alpha_ptr[5],*m10p);  // m01=-m10
      m_b3 = vqsubq_s8(alpha_ptr[7],*m11p);  // m00=-m11
      m_b7 = vqaddq_s8(alpha_ptr[7],*m11p);  // m11

      new0 = vqsubq_s8(alpha_ptr[0],*m11p);  // m00=-m11
      new4 = vqaddq_s8(alpha_ptr[0],*m11p);  // m11
      new1 = vqaddq_s8(alpha_ptr[2],*m10p);  // m10
      new5 = vqsubq_s8(alpha_ptr[2],*m10p);  // m01=-m10
      new2 = vqsubq_s8(alpha_ptr[4],*m10p);  // m01=-m10
      new6 = vqaddq_s8(alpha_ptr[4],*m10p);  // m10
      new3 = vqaddq_s8(alpha_ptr[6],*m11p);  // m11
      new7 = vqsubq_s8(alpha_ptr[6],*m11p);  // m00=-m11

      alpha_ptr += 8;
      m11p++;
      m10p++;
      alpha_ptr[0] = vmaxq_s8(m_b0,new0);
      alpha_ptr[1] = vmaxq_s8(m_b1,new1);
      alpha_ptr[2] = vmaxq_s8(m_b2,new2);
      alpha_ptr[3] = vmaxq_s8(m_b3,new3);
      alpha_ptr[4] = vmaxq_s8(m_b4,new4);
      alpha_ptr[5] = vmaxq_s8(m_b5,new5);
      alpha_ptr[6] = vmaxq_s8(m_b6,new6);
      alpha_ptr[7] = vmaxq_s8(m_b7,new7);

      // compute and subtract maxima
      alpha_max = vmaxq_s8(alpha_ptr[0],alpha_ptr[1]);
      alpha_max = vmaxq_s8(alpha_max,alpha_ptr[2]);
      alpha_max = vmaxq_s8(alpha_max,alpha_ptr[3]);
      alpha_max = vmaxq_s8(alpha_max,alpha_ptr[4]);
      alpha_max = vmaxq_s8(alpha_max,alpha_ptr[5]);
      alpha_max = vmaxq_s8(alpha_max,alpha_ptr[6]);
      alpha_max = vmaxq_s8(alpha_max,alpha_ptr[7]);

      alpha_ptr[0] = vqsubq_s8(alpha_ptr[0],alpha_max);
      alpha_ptr[1] = vqsubq_s8(alpha_ptr[1],alpha_max);
      alpha_ptr[2] = vqsubq_s8(alpha_ptr[2],alpha_max);
      alpha_ptr[3] = vqsubq_s8(alpha_ptr[3],alpha_max);
      alpha_ptr[4] = vqsubq_s8(alpha_ptr[4],alpha_max);
      alpha_ptr[5] = vqsubq_s8(alpha_ptr[5],alpha_max);
      alpha_ptr[6] = vqsubq_s8(alpha_ptr[6],alpha_max);
      alpha_ptr[7] = vqsubq_s8(alpha_ptr[7],alpha_max);
    }

    // Set intial state for next iteration from the last state
    // as a column end states are the first states of the next column
    int K1= frame_length>>1;
    alpha128[0] = (int8x16_t)vshlq_n_s64((int64x2_t)alpha128[K1],8);   alpha128[0] = vsetq_lane_s8(alpha[8],alpha128[0],7);
    alpha128[1] = (int8x16_t)vshlq_n_s64((int64x2_t)alpha128[1+K1],8); alpha128[1] = vsetq_lane_s8(alpha[24],alpha128[0],7);
    alpha128[2] = (int8x16_t)vshlq_n_s64((int64x2_t)alpha128[2+K1],8); alpha128[2] = vsetq_lane_s8(alpha[40],alpha128[0],7);
    alpha128[3] = (int8x16_t)vshlq_n_s64((int64x2_t)alpha128[3+K1],8); alpha128[3] = vsetq_lane_s8(alpha[56],alpha128[0],7);
    alpha128[4] = (int8x16_t)vshlq_n_s64((int64x2_t)alpha128[4+K1],8); alpha128[4] = vsetq_lane_s8(alpha[72],alpha128[0],7);
    alpha128[5] = (int8x16_t)vshlq_n_s64((int64x2_t)alpha128[5+K1],8); alpha128[5] = vsetq_lane_s8(alpha[88],alpha128[0],7);
    alpha128[6] = (int8x16_t)vshlq_n_s64((int64x2_t)alpha128[6+K1],8); alpha128[6] = vsetq_lane_s8(alpha[104],alpha128[0],7);
    alpha128[7] = (int8x16_t)vshlq_n_s64((int64x2_t)alpha128[7+K1],8); alpha128[7] = vsetq_lane_s8(alpha[120],alpha128[0],7);
    alpha[16] =  -MAX8/2;
    alpha[32] = -MAX8/2;
    alpha[48] = -MAX8/2;
    alpha[64] = -MAX8/2;
    alpha[80] = -MAX8/2;
    alpha[96] = -MAX8/2;
    alpha[112] = -MAX8/2;

  }
#endif

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404 405 406
}


407 408 409
void compute_beta8(llr_t* alpha,llr_t* beta,llr_t *m_11,llr_t* m_10,unsigned short frame_length,unsigned char F,int offset8_flag)
{

410
  int k,rerun_flag, loopval;
411
#if defined(__x86_64__) || defined(__i386__)
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  __m128i m11_128,m10_128;
  __m128i m_b0,m_b1,m_b2,m_b3,m_b4,m_b5,m_b6,m_b7;
  __m128i new0,new1,new2,new3,new4,new5,new6,new7;

  __m128i *beta128,*alpha128,*beta_ptr;
417
  __m128i beta_max;
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#elif defined(__arm__)
  int8x16_t m11_128,m10_128;
  int8x16_t m_b0,m_b1,m_b2,m_b3,m_b4,m_b5,m_b6,m_b7;
  int8x16_t new0,new1,new2,new3,new4,new5,new6,new7;
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  int8x16_t *beta128,*alpha128,*beta_ptr;
  int8x16_t beta_max;
#endif
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  llr_t beta0,beta1;

  llr_t beta2,beta3,beta4,beta5,beta6,beta7;
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#if 0
432
  int16_t m11,m10;
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  int16_t beta0_16,beta1_16,beta2_16,beta3_16,beta4_16,beta5_16,beta6_16,beta7_16,beta0_2,beta1_2,beta2_2,beta3_2,beta_m;
434
  __m128i beta_16;
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  // termination for beta initialization

  m11=(int16_t)m_11[2+frame_length];
  m10=(int16_t)m_10[2+frame_length];

  beta0 = -m11;//M0T_TERM;
  beta1 = m11;//M1T_TERM;
  m11=(int16_t)m_11[1+frame_length];
  m10=(int16_t)m_10[1+frame_length];

  beta0_2 = beta0-m11;//+M0T_TERM;
  beta1_2 = beta0+m11;//+M1T_TERM;
  beta2_2 = beta1+m10;//M2T_TERM;
  beta3_2 = beta1-m10;//+M3T_TERM;
  m11=(int16_t)m_11[frame_length];
  m10=(int16_t)m_10[frame_length];

  beta0_16 = beta0_2-m11;//+M0T_TERM;
  beta1_16 = beta0_2+m11;//+M1T_TERM;
  beta2_16 = beta1_2+m10;//+M2T_TERM;
  beta3_16 = beta1_2-m10;//+M3T_TERM;
  beta4_16 = beta2_2-m10;//+M4T_TERM;
  beta5_16 = beta2_2+m10;//+M5T_TERM;
  beta6_16 = beta3_2+m11;//+M6T_TERM;
  beta7_16 = beta3_2-m11;//+M7T_TERM;

  beta_m = (beta0_16>beta1_16) ? beta0_16 : beta1_16;
  beta_m = (beta_m>beta2_16) ? beta_m : beta2_16;
  beta_m = (beta_m>beta3_16) ? beta_m : beta3_16;
  beta_m = (beta_m>beta4_16) ? beta_m : beta4_16;
  beta_m = (beta_m>beta5_16) ? beta_m : beta5_16;
  beta_m = (beta_m>beta6_16) ? beta_m : beta6_16;
  beta_m = (beta_m>beta7_16) ? beta_m : beta7_16;

  beta0_16=beta0_16-beta_m;
  beta1_16=beta1_16-beta_m;
  beta2_16=beta2_16-beta_m;
  beta3_16=beta3_16-beta_m;
  beta4_16=beta4_16-beta_m;
  beta5_16=beta5_16-beta_m;
  beta6_16=beta6_16-beta_m;
  beta7_16=beta7_16-beta_m;

  beta_16 = _mm_set_epi16(beta7_16,beta6_16,beta5_16,beta4_16,beta3_16,beta2_16,beta1_16,beta0_16);
  beta_16 = _mm_packs_epi16(beta_16,beta_16);
  beta0 = _mm_extract_epi8(beta_16,0);
  beta1 = _mm_extract_epi8(beta_16,1);
  beta2 = _mm_extract_epi8(beta_16,2);
  beta3 = _mm_extract_epi8(beta_16,3);
  beta4 = _mm_extract_epi8(beta_16,4);
  beta5 = _mm_extract_epi8(beta_16,5);
  beta6 = _mm_extract_epi8(beta_16,6);
  beta7 = _mm_extract_epi8(beta_16,7);

#endif

491
  if (frame_length > 6144) {
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    LOG_E(PHY,"compute_beta: frame_length %d\n",frame_length);
    return;
  }

496 497
  // we are supposed to run compute_alpha just before compute_beta
  // so the initial states of backward computation can be set from last value of alpha states (forward computation)
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#if defined(__x86_64__) || defined(__i386__)
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  beta_ptr   = (__m128i*)&beta[frame_length<<3];
  alpha128   = (__m128i*)&alpha[0];
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#elif defined(__arm__)
  beta_ptr   = (int8x16_t*)&beta[frame_length<<3];
  alpha128   = (int8x16_t*)&alpha[0];
#endif
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  beta_ptr[0] = alpha128[(frame_length>>1)];
  beta_ptr[1] = alpha128[1+(frame_length>>1)];
  beta_ptr[2] = alpha128[2+(frame_length>>1)];
  beta_ptr[3] = alpha128[3+(frame_length>>1)];
  beta_ptr[4] = alpha128[4+(frame_length>>1)];
  beta_ptr[5] = alpha128[5+(frame_length>>1)];
  beta_ptr[6] = alpha128[6+(frame_length>>1)];
  beta_ptr[7] = alpha128[7+(frame_length>>1)];

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  int overlap = (frame_length>>4)> L ? (frame_length>>4)-L : 0 ;

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  for (rerun_flag=0, loopval=0;
       rerun_flag<2 ;
519
       loopval=overlap,rerun_flag++) {
520 521

    if (offset8_flag==0) {
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      // FIXME! beta0-beta7 are used uninitialized. FIXME!
      // workaround: init with 0
      beta0 = beta1 = beta2 = beta3 = beta4 = beta5 = beta6 = beta7 = 0;

526
#if defined(__x86_64__) || defined(__i386__)
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      beta_ptr[0] = _mm_insert_epi8(beta_ptr[0],beta0,15);
      beta_ptr[1] = _mm_insert_epi8(beta_ptr[1],beta1,15);
      beta_ptr[2] = _mm_insert_epi8(beta_ptr[2],beta2,15);
      beta_ptr[3] = _mm_insert_epi8(beta_ptr[3],beta3,15);
      beta_ptr[4] = _mm_insert_epi8(beta_ptr[4],beta4,15);
      beta_ptr[5] = _mm_insert_epi8(beta_ptr[5],beta5,15);
      beta_ptr[6] = _mm_insert_epi8(beta_ptr[6],beta6,15);
      beta_ptr[7] = _mm_insert_epi8(beta_ptr[7],beta7,15);
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#elif defined(__arm__)
      beta_ptr[0] = vsetq_lane_s8(beta0,beta_ptr[0],15);
      beta_ptr[1] = vsetq_lane_s8(beta1,beta_ptr[1],15);
      beta_ptr[2] = vsetq_lane_s8(beta2,beta_ptr[2],15);
      beta_ptr[3] = vsetq_lane_s8(beta3,beta_ptr[3],15);
      beta_ptr[4] = vsetq_lane_s8(beta4,beta_ptr[4],15);
      beta_ptr[5] = vsetq_lane_s8(beta5,beta_ptr[5],15);
      beta_ptr[6] = vsetq_lane_s8(beta6,beta_ptr[6],15);
      beta_ptr[7] = vsetq_lane_s8(beta7,beta_ptr[7],15);
#endif
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    }

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#if defined(__x86_64__) || defined(__i386__)
    beta_ptr = (__m128i*)&beta[frame_length<<3];
#elif defined(__arm__)
    beta_ptr = (int8x16_t*)&beta[frame_length<<3];
#endif
    for (k=(frame_length>>4)-1;
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         k>=loopval;
         k--) {
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#if defined(__x86_64__) || defined(__i386__)
556
      m11_128=((__m128i*)m_11)[k];
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      m10_128=((__m128i*)m_10)[k];
      m_b0 = _mm_adds_epi8(beta_ptr[4],m11_128);  //m11
      m_b1 = _mm_subs_epi8(beta_ptr[4],m11_128);  //m00
      m_b2 = _mm_subs_epi8(beta_ptr[5],m10_128);  //m01
      m_b3 = _mm_adds_epi8(beta_ptr[5],m10_128);  //m10
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      m_b4 = _mm_adds_epi8(beta_ptr[6],m10_128);  //m10
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      m_b5 = _mm_subs_epi8(beta_ptr[6],m10_128);  //m01
      m_b6 = _mm_subs_epi8(beta_ptr[7],m11_128);  //m00
      m_b7 = _mm_adds_epi8(beta_ptr[7],m11_128);  //m11
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      new0 = _mm_subs_epi8(beta_ptr[0],m11_128);  //m00
      new1 = _mm_adds_epi8(beta_ptr[0],m11_128);  //m11
      new2 = _mm_adds_epi8(beta_ptr[1],m10_128);  //m10
      new3 = _mm_subs_epi8(beta_ptr[1],m10_128);  //m01
      new4 = _mm_subs_epi8(beta_ptr[2],m10_128);  //m01
      new5 = _mm_adds_epi8(beta_ptr[2],m10_128);  //m10
      new6 = _mm_adds_epi8(beta_ptr[3],m11_128);  //m11
      new7 = _mm_subs_epi8(beta_ptr[3],m11_128);  //m00
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      beta_ptr-=8;
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      beta_ptr[0] = _mm_max_epi8(m_b0,new0);
      beta_ptr[1] = _mm_max_epi8(m_b1,new1);
      beta_ptr[2] = _mm_max_epi8(m_b2,new2);
      beta_ptr[3] = _mm_max_epi8(m_b3,new3);
      beta_ptr[4] = _mm_max_epi8(m_b4,new4);
      beta_ptr[5] = _mm_max_epi8(m_b5,new5);
      beta_ptr[6] = _mm_max_epi8(m_b6,new6);
      beta_ptr[7] = _mm_max_epi8(m_b7,new7);
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      beta_max = _mm_max_epi8(beta_ptr[0],beta_ptr[1]);
      beta_max = _mm_max_epi8(beta_max   ,beta_ptr[2]);
      beta_max = _mm_max_epi8(beta_max   ,beta_ptr[3]);
      beta_max = _mm_max_epi8(beta_max   ,beta_ptr[4]);
      beta_max = _mm_max_epi8(beta_max   ,beta_ptr[5]);
      beta_max = _mm_max_epi8(beta_max   ,beta_ptr[6]);
      beta_max = _mm_max_epi8(beta_max   ,beta_ptr[7]);

      beta_ptr[0] = _mm_subs_epi8(beta_ptr[0],beta_max);
      beta_ptr[1] = _mm_subs_epi8(beta_ptr[1],beta_max);
      beta_ptr[2] = _mm_subs_epi8(beta_ptr[2],beta_max);
      beta_ptr[3] = _mm_subs_epi8(beta_ptr[3],beta_max);
      beta_ptr[4] = _mm_subs_epi8(beta_ptr[4],beta_max);
      beta_ptr[5] = _mm_subs_epi8(beta_ptr[5],beta_max);
      beta_ptr[6] = _mm_subs_epi8(beta_ptr[6],beta_max);
      beta_ptr[7] = _mm_subs_epi8(beta_ptr[7],beta_max);
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#elif defined(__arm__)
      m11_128=((int8x16_t*)m_11)[k];
      m10_128=((int8x16_t*)m_10)[k];
      m_b0 = vqaddq_s8(beta_ptr[4],m11_128);  //m11
      m_b1 = vqsubq_s8(beta_ptr[4],m11_128);  //m00
      m_b2 = vqsubq_s8(beta_ptr[5],m10_128);  //m01
      m_b3 = vqaddq_s8(beta_ptr[5],m10_128);  //m10
      m_b4 = vqaddq_s8(beta_ptr[6],m10_128);  //m10
      m_b5 = vqsubq_s8(beta_ptr[6],m10_128);  //m01
      m_b6 = vqsubq_s8(beta_ptr[7],m11_128);  //m00
      m_b7 = vqaddq_s8(beta_ptr[7],m11_128);  //m11

      new0 = vqsubq_s8(beta_ptr[0],m11_128);  //m00
      new1 = vqaddq_s8(beta_ptr[0],m11_128);  //m11
      new2 = vqaddq_s8(beta_ptr[1],m10_128);  //m10
      new3 = vqsubq_s8(beta_ptr[1],m10_128);  //m01
      new4 = vqsubq_s8(beta_ptr[2],m10_128);  //m01
      new5 = vqaddq_s8(beta_ptr[2],m10_128);  //m10
      new6 = vqaddq_s8(beta_ptr[3],m11_128);  //m11
      new7 = vqsubq_s8(beta_ptr[3],m11_128);  //m00

      beta_ptr-=8;
625

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      beta_ptr[0] = vmaxq_s8(m_b0,new0);
      beta_ptr[1] = vmaxq_s8(m_b1,new1);
      beta_ptr[2] = vmaxq_s8(m_b2,new2);
      beta_ptr[3] = vmaxq_s8(m_b3,new3);
      beta_ptr[4] = vmaxq_s8(m_b4,new4);
      beta_ptr[5] = vmaxq_s8(m_b5,new5);
      beta_ptr[6] = vmaxq_s8(m_b6,new6);
      beta_ptr[7] = vmaxq_s8(m_b7,new7);

      beta_max = vmaxq_s8(beta_ptr[0],beta_ptr[1]);
      beta_max = vmaxq_s8(beta_max   ,beta_ptr[2]);
      beta_max = vmaxq_s8(beta_max   ,beta_ptr[3]);
      beta_max = vmaxq_s8(beta_max   ,beta_ptr[4]);
      beta_max = vmaxq_s8(beta_max   ,beta_ptr[5]);
      beta_max = vmaxq_s8(beta_max   ,beta_ptr[6]);
      beta_max = vmaxq_s8(beta_max   ,beta_ptr[7]);

      beta_ptr[0] = vqsubq_s8(beta_ptr[0],beta_max);
      beta_ptr[1] = vqsubq_s8(beta_ptr[1],beta_max);
      beta_ptr[2] = vqsubq_s8(beta_ptr[2],beta_max);
      beta_ptr[3] = vqsubq_s8(beta_ptr[3],beta_max);
      beta_ptr[4] = vqsubq_s8(beta_ptr[4],beta_max);
      beta_ptr[5] = vqsubq_s8(beta_ptr[5],beta_max);
      beta_ptr[6] = vqsubq_s8(beta_ptr[6],beta_max);
      beta_ptr[7] = vqsubq_s8(beta_ptr[7],beta_max);
#endif
652 653 654
    }

    // Set intial state for next iteration from the last state
655
    // as column last states are the first states of the next column
656 657 658
    // The initial state of column 0 is coming from tail bits (to be computed)

#if defined(__x86_64__) || defined(__i386__)
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    beta128 = (__m128i*)&beta[0];
    beta_ptr   = (__m128i*)&beta[frame_length<<3];
    beta_ptr[0] = _mm_srli_si128(beta128[0],1);
    beta_ptr[1] = _mm_srli_si128(beta128[1],1);
    beta_ptr[2] = _mm_srli_si128(beta128[2],1);
    beta_ptr[3] = _mm_srli_si128(beta128[3],1);
    beta_ptr[4] = _mm_srli_si128(beta128[4],1);
    beta_ptr[5] = _mm_srli_si128(beta128[5],1);
    beta_ptr[6] = _mm_srli_si128(beta128[6],1);
    beta_ptr[7] = _mm_srli_si128(beta128[7],1);
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#elif defined(__arm__)
    beta128 = (int8x16_t*)&beta[0];
    beta_ptr   = (int8x16_t*)&beta[frame_length<<3];
    beta_ptr[0] = (int8x16_t)vshrq_n_s64((int64x2_t)beta128[0],8);   beta_ptr[0] = vsetq_lane_s8(beta[7],beta_ptr[0],8);
    beta_ptr[1] = (int8x16_t)vshrq_n_s64((int64x2_t)beta128[1],8);   beta_ptr[1] = vsetq_lane_s8(beta[23],beta_ptr[1],8);
    beta_ptr[2] = (int8x16_t)vshrq_n_s64((int64x2_t)beta128[2],8);   beta_ptr[2] = vsetq_lane_s8(beta[39],beta_ptr[2],8);
    beta_ptr[3] = (int8x16_t)vshrq_n_s64((int64x2_t)beta128[3],8);   beta_ptr[3] = vsetq_lane_s8(beta[55],beta_ptr[3],8);
    beta_ptr[4] = (int8x16_t)vshrq_n_s64((int64x2_t)beta128[4],8);   beta_ptr[4] = vsetq_lane_s8(beta[71],beta_ptr[4],8);
    beta_ptr[5] = (int8x16_t)vshrq_n_s64((int64x2_t)beta128[5],8);   beta_ptr[5] = vsetq_lane_s8(beta[87],beta_ptr[5],8);
    beta_ptr[6] = (int8x16_t)vshrq_n_s64((int64x2_t)beta128[6],8);   beta_ptr[6] = vsetq_lane_s8(beta[103],beta_ptr[6],8);
    beta_ptr[7] = (int8x16_t)vshrq_n_s64((int64x2_t)beta128[7],8);   beta_ptr[7] = vsetq_lane_s8(beta[119],beta_ptr[7],8);
#endif
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  }
}

684 685
void compute_ext8(llr_t* alpha,llr_t* beta,llr_t* m_11,llr_t* m_10,llr_t* ext, llr_t* systematic,unsigned short frame_length)
{
686

687
#if defined(__x86_64__) || defined(__i386__)
688 689 690 691 692 693 694 695
  __m128i *alpha128=(__m128i *)alpha;
  __m128i *beta128=(__m128i *)beta;
  __m128i *m11_128,*m10_128,*ext_128;
  __m128i *alpha_ptr,*beta_ptr;
  __m128i m00_1,m00_2,m00_3,m00_4;
  __m128i m01_1,m01_2,m01_3,m01_4;
  __m128i m10_1,m10_2,m10_3,m10_4;
  __m128i m11_1,m11_2,m11_3,m11_4;
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#elif defined(__arm__)
  int8x16_t *alpha128=(int8x16_t *)alpha;
  int8x16_t *beta128=(int8x16_t *)beta;
  int8x16_t *m11_128,*m10_128,*ext_128;
  int8x16_t *alpha_ptr,*beta_ptr;
  int8x16_t m00_1,m00_2,m00_3,m00_4;
  int8x16_t m01_1,m01_2,m01_3,m01_4;
  int8x16_t m10_1,m10_2,m10_3,m10_4;
  int8x16_t m11_1,m11_2,m11_3,m11_4;
#endif
706 707 708 709 710 711 712
  int k;

  //
  // LLR computation, 8 consequtive bits per loop
  //

#ifdef DEBUG_LOGMAP
713
  printf("compute_ext, %p, %p, %p, %p, %p, %p ,framelength %d\n",alpha,beta,m_11,m_10,ext,systematic,frame_length);
714 715 716 717 718 719
#endif

  alpha_ptr = alpha128;
  beta_ptr = &beta128[8];


720
  for (k=0; k<(frame_length>>4); k++) {
721

722 723
#if defined(__x86_64__) || defined(__i386__)

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    m11_128        = (__m128i*)&m_11[k<<4];
    m10_128        = (__m128i*)&m_10[k<<4];
    ext_128        = (__m128i*)&ext[k<<4];

    m00_4 = _mm_adds_epi8(alpha_ptr[7],beta_ptr[3]); //ALPHA_BETA_4m00;
    m11_4 = _mm_adds_epi8(alpha_ptr[7],beta_ptr[7]); //ALPHA_BETA_4m11;
    m00_3 = _mm_adds_epi8(alpha_ptr[6],beta_ptr[7]); //ALPHA_BETA_3m00;
    m11_3 = _mm_adds_epi8(alpha_ptr[6],beta_ptr[3]); //ALPHA_BETA_3m11;
    m00_2 = _mm_adds_epi8(alpha_ptr[1],beta_ptr[4]); //ALPHA_BETA_2m00;
    m11_2 = _mm_adds_epi8(alpha_ptr[1],beta_ptr[0]); //ALPHA_BETA_2m11;
    m11_1 = _mm_adds_epi8(alpha_ptr[0],beta_ptr[4]); //ALPHA_BETA_1m11;
    m00_1 = _mm_adds_epi8(alpha_ptr[0],beta_ptr[0]); //ALPHA_BETA_1m00;
    m01_4 = _mm_adds_epi8(alpha_ptr[5],beta_ptr[6]); //ALPHA_BETA_4m01;
    m10_4 = _mm_adds_epi8(alpha_ptr[5],beta_ptr[2]); //ALPHA_BETA_4m10;
    m01_3 = _mm_adds_epi8(alpha_ptr[4],beta_ptr[2]); //ALPHA_BETA_3m01;
    m10_3 = _mm_adds_epi8(alpha_ptr[4],beta_ptr[6]); //ALPHA_BETA_3m10;
    m01_2 = _mm_adds_epi8(alpha_ptr[3],beta_ptr[1]); //ALPHA_BETA_2m01;
    m10_2 = _mm_adds_epi8(alpha_ptr[3],beta_ptr[5]); //ALPHA_BETA_2m10;
    m10_1 = _mm_adds_epi8(alpha_ptr[2],beta_ptr[1]); //ALPHA_BETA_1m10;
    m01_1 = _mm_adds_epi8(alpha_ptr[2],beta_ptr[5]); //ALPHA_BETA_1m01;

    m01_1 = _mm_max_epi8(m01_1,m01_2);
    m01_1 = _mm_max_epi8(m01_1,m01_3);
    m01_1 = _mm_max_epi8(m01_1,m01_4);
    m00_1 = _mm_max_epi8(m00_1,m00_2);
    m00_1 = _mm_max_epi8(m00_1,m00_3);
    m00_1 = _mm_max_epi8(m00_1,m00_4);
    m10_1 = _mm_max_epi8(m10_1,m10_2);
    m10_1 = _mm_max_epi8(m10_1,m10_3);
    m10_1 = _mm_max_epi8(m10_1,m10_4);
    m11_1 = _mm_max_epi8(m11_1,m11_2);
    m11_1 = _mm_max_epi8(m11_1,m11_3);
    m11_1 = _mm_max_epi8(m11_1,m11_4);

758

759 760 761 762 763 764 765 766 767 768 769
    m01_1 = _mm_subs_epi8(m01_1,*m10_128);
    m00_1 = _mm_subs_epi8(m00_1,*m11_128);
    m10_1 = _mm_adds_epi8(m10_1,*m10_128);
    m11_1 = _mm_adds_epi8(m11_1,*m11_128);


    m01_1 = _mm_max_epi8(m01_1,m00_1);
    m10_1 = _mm_max_epi8(m10_1,m11_1);


    *ext_128 = _mm_subs_epi8(m10_1,m01_1);
770

771 772
    alpha_ptr+=8;
    beta_ptr+=8;
773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825
#elif defined(__arm__)

    m11_128        = (int8x16_t*)&m_11[k<<4];
    m10_128        = (int8x16_t*)&m_10[k<<4];
    ext_128        = (int8x16_t*)&ext[k<<4];

    m00_4 = vqaddq_s8(alpha_ptr[7],beta_ptr[3]); //ALPHA_BETA_4m00;
    m11_4 = vqaddq_s8(alpha_ptr[7],beta_ptr[7]); //ALPHA_BETA_4m11;
    m00_3 = vqaddq_s8(alpha_ptr[6],beta_ptr[7]); //ALPHA_BETA_3m00;
    m11_3 = vqaddq_s8(alpha_ptr[6],beta_ptr[3]); //ALPHA_BETA_3m11;
    m00_2 = vqaddq_s8(alpha_ptr[1],beta_ptr[4]); //ALPHA_BETA_2m00;
    m11_2 = vqaddq_s8(alpha_ptr[1],beta_ptr[0]); //ALPHA_BETA_2m11;
    m11_1 = vqaddq_s8(alpha_ptr[0],beta_ptr[4]); //ALPHA_BETA_1m11;
    m00_1 = vqaddq_s8(alpha_ptr[0],beta_ptr[0]); //ALPHA_BETA_1m00;
    m01_4 = vqaddq_s8(alpha_ptr[5],beta_ptr[6]); //ALPHA_BETA_4m01;
    m10_4 = vqaddq_s8(alpha_ptr[5],beta_ptr[2]); //ALPHA_BETA_4m10;
    m01_3 = vqaddq_s8(alpha_ptr[4],beta_ptr[2]); //ALPHA_BETA_3m01;
    m10_3 = vqaddq_s8(alpha_ptr[4],beta_ptr[6]); //ALPHA_BETA_3m10;
    m01_2 = vqaddq_s8(alpha_ptr[3],beta_ptr[1]); //ALPHA_BETA_2m01;
    m10_2 = vqaddq_s8(alpha_ptr[3],beta_ptr[5]); //ALPHA_BETA_2m10;
    m10_1 = vqaddq_s8(alpha_ptr[2],beta_ptr[1]); //ALPHA_BETA_1m10;
    m01_1 = vqaddq_s8(alpha_ptr[2],beta_ptr[5]); //ALPHA_BETA_1m01;

    m01_1 = vmaxq_s8(m01_1,m01_2);
    m01_1 = vmaxq_s8(m01_1,m01_3);
    m01_1 = vmaxq_s8(m01_1,m01_4);
    m00_1 = vmaxq_s8(m00_1,m00_2);
    m00_1 = vmaxq_s8(m00_1,m00_3);
    m00_1 = vmaxq_s8(m00_1,m00_4);
    m10_1 = vmaxq_s8(m10_1,m10_2);
    m10_1 = vmaxq_s8(m10_1,m10_3);
    m10_1 = vmaxq_s8(m10_1,m10_4);
    m11_1 = vmaxq_s8(m11_1,m11_2);
    m11_1 = vmaxq_s8(m11_1,m11_3);
    m11_1 = vmaxq_s8(m11_1,m11_4);


    m01_1 = vqsubq_s8(m01_1,*m10_128);
    m00_1 = vqsubq_s8(m00_1,*m11_128);
    m10_1 = vqaddq_s8(m10_1,*m10_128);
    m11_1 = vqaddq_s8(m11_1,*m11_128);


    m01_1 = vmaxq_s8(m01_1,m00_1);
    m10_1 = vmaxq_s8(m10_1,m11_1);


    *ext_128 = vqsubq_s8(m10_1,m01_1);

    alpha_ptr+=8;
    beta_ptr+=8;

#endif
826 827 828 829 830 831 832 833 834 835
  }


}



//int pi2[n],pi3[n+8],pi5[n+8],pi4[n+8],pi6[n+8],
int *pi2tab8[188],*pi5tab8[188],*pi4tab8[188],*pi6tab8[188];

836 837 838 839 840
void free_td8(void)
{
  int ind;

  for (ind=0; ind<188; ind++) {
841 842 843 844
    free_and_zero(pi2tab8[ind]);
    free_and_zero(pi5tab8[ind]);
    free_and_zero(pi4tab8[ind]);
    free_and_zero(pi6tab8[ind]);
845
  }
846 847
}

848 849 850 851


extern RAN_CONTEXT_t RC;

852 853
void init_td8()
{
854 855 856 857

  int ind,i,j,n,n2,pi,pi3;
  short * base_interleaver;

858
  for (ind=0; ind<188; ind++) {
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876

    n = f1f2mat[ind].nb_bits;
    base_interleaver=il_tb+f1f2mat[ind].beg_index;
#ifdef MEX
    // This is needed for the Mex implementation to make the memory persistent
    pi2tab8[ind] = mxMalloc((n+8)*sizeof(int));
    pi5tab8[ind] = mxMalloc((n+8)*sizeof(int));
    pi4tab8[ind] = mxMalloc((n+8)*sizeof(int));
    pi6tab8[ind] = mxMalloc((n+8)*sizeof(int));
#else
    pi2tab8[ind] = malloc((n+8)*sizeof(int));
    pi5tab8[ind] = malloc((n+8)*sizeof(int));
    pi4tab8[ind] = malloc((n+8)*sizeof(int));
    pi6tab8[ind] = malloc((n+8)*sizeof(int));
#endif

    if ((n&15)>0) {
      n2 = n+8;
877
    } else
878 879
      n2 = n;

880 881
    for (j=0,i=0; i<n2; i++,j+=16) {

882
      if (j>=n2)
883 884
        j-=(n2-1);

885 886 887
      pi2tab8[ind][i] = j;
      //    printf("pi2[%d] = %d\n",i,j);
    }
888
    
889
    for (i=0; i<n2; i++) {
890 891 892 893 894
      pi = base_interleaver[i];//(unsigned int)threegpplte_interleaver(f1,f2,n);
      pi3 = pi2tab8[ind][pi];
      pi4tab8[ind][pi2tab8[ind][i]] = pi3;
      pi5tab8[ind][pi3] = pi2tab8[ind][i];
      pi6tab8[ind][pi] = pi2tab8[ind][i];
895
      }
896 897 898 899 900

  }
}

unsigned char phy_threegpplte_turbo_decoder8(short *y,
901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916
    unsigned char *decoded_bytes,
    unsigned short n,
    unsigned short f1,
    unsigned short f2,
    unsigned char max_iterations,
    unsigned char crc_type,
    unsigned char F,
    time_stats_t *init_stats,
    time_stats_t *alpha_stats,
    time_stats_t *beta_stats,
    time_stats_t *gamma_stats,
    time_stats_t *ext_stats,
    time_stats_t *intl1_stats,
    time_stats_t *intl2_stats)
{

917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939
  /*  y is a pointer to the input
      decoded_bytes is a pointer to the decoded output
      n is the size in bits of the coded block, with the tail */

  int n2;

  llr_t y8[3*(n+16)] __attribute__((aligned(16)));


  llr_t systematic0[n+16] __attribute__ ((aligned(16)));
  llr_t systematic1[n+16] __attribute__ ((aligned(16)));
  llr_t systematic2[n+16] __attribute__ ((aligned(16)));
  llr_t yparity1[n+16] __attribute__ ((aligned(16)));
  llr_t yparity2[n+16] __attribute__ ((aligned(16)));

  llr_t ext[n+128] __attribute__((aligned(16)));
  llr_t ext2[n+128] __attribute__((aligned(16)));

  llr_t alpha[(n+16)*8] __attribute__ ((aligned(16)));
  llr_t beta[(n+16)*8] __attribute__ ((aligned(16)));
  llr_t m11[n+16] __attribute__ ((aligned(16)));
  llr_t m10[n+16] __attribute__ ((aligned(16)));

940

941 942
  //  int *pi2_p,*pi4_p,*pi5_p,*pi6_p;
  int *pi4_p,*pi5_p,*pi6_p;
943
  llr_t *s,*s1,*s2,*yp1,*yp2,*yp;
944

945 946 947
  unsigned int i,j,iind;//,pi;
  unsigned char iteration_cnt=0;
  unsigned int crc,oldcrc,crc_len;
948
  uint8_t temp;
949 950
#if defined(__x86_64__) || defined(__i386__)
  __m128i *yp128;
951 952
  __m128i tmp128[(n+8)>>3];
  __m128i tmp, zeros=_mm_setzero_si128();
953 954 955 956 957 958 959 960 961 962
#elif defined(__arm__)
  int8x16_t *yp128;
  int8x16_t tmp128[(n+8)>>3];
  int8x16_t tmp, zeros=vdupq_n_s8(0);
  const uint8_t __attribute__ ((aligned (16))) _Powers[16]= 
    { 1, 2, 4, 8, 16, 32, 64, 128, 1, 2, 4, 8, 16, 32, 64, 128 };
  
  // Set the powers of 2 (do it once for all, if applicable)
  uint8x16_t Powers= vld1q_u8(_Powers);
#endif
963 964 965 966

  int offset8_flag=0;

  if (crc_type > 3) {
967
    printf("Illegal crc length!\n");
968 969 970 971
    return 255;
  }


972
  if (init_stats) start_meas(init_stats);
973 974 975 976 977


  if ((n&15)>0) {
    n2 = n+8;
    offset8_flag=1;
978
  } else
979 980 981
    n2 = n;


982
  for (iind=0; iind < 188 && f1f2mat[iind].nb_bits != n; iind++);
983

984
  if ( iind == 188 ) {
985
    printf("Illegal frame length!\n");
986 987
    return 255;
  }
988

989 990 991 992 993
  switch (crc_type) {
  case CRC24_A:
  case CRC24_B:
    crc_len=3;
    break;
994

995 996 997
  case CRC16:
    crc_len=2;
    break;
998

999 1000 1001
  case CRC8:
    crc_len=1;
    break;
1002 1003 1004 1005 1006

  default:
    crc_len=3;
  }

1007 1008
#if defined(__x86_64__) || defined(__i386__)

1009
  // note: this makes valgrind freak
1010
  __m128i avg=_mm_set1_epi32(0);
1011 1012

  for (i=0; i<(3*(n>>4))+1; i++) {
1013 1014 1015 1016
    __m128i tmp=_mm_abs_epi16(_mm_unpackhi_epi16(((__m128i*)y)[i],((__m128i*)y)[i]));
    avg=_mm_add_epi32(_mm_cvtepi16_epi32(_mm_abs_epi16(((__m128i*)y)[i])),avg);
    avg=_mm_add_epi32(_mm_cvtepi16_epi32(tmp),avg);
  }
1017

1018
  int32_t round_avg=(_mm_extract_epi32(avg,0)+_mm_extract_epi32(avg,1)+_mm_extract_epi32(avg,2)+_mm_extract_epi32(avg,3))/(n*3);
1019

1020
  //printf("avg input turbo: %d sum %d taille bloc %d\n",round_avg,round_sum,n);
1021

1022 1023
  if (round_avg < 16 )
    for (i=0,j=0; i<(3*(n2>>4))+1; i++,j+=2)
1024
      ((__m128i *)y8)[i] = _mm_packs_epi16(((__m128i *)y)[j],((__m128i *)y)[j+1]);
1025 1026
  else if (round_avg < 32)
    for (i=0,j=0; i<(3*(n2>>4))+1; i++,j+=2)
1027 1028
      ((__m128i *)y8)[i] = _mm_packs_epi16(_mm_srai_epi16(((__m128i *)y)[j],1),_mm_srai_epi16(((__m128i *)y)[j+1],1));
  else if (round_avg < 64 )
1029
    for (i=0,j=0; i<(3*(n2>>4))+1; i++,j+=2)
1030
      ((__m128i *)y8)[i] = _mm_packs_epi16(_mm_srai_epi16(((__m128i *)y)[j],2),_mm_srai_epi16(((__m128i *)y)[j+1],2));
1031
  else if (round_avg < 128)
1032
    for (i=0,j=0; i<(3*(n2>>4))+1; i++,j+=2)
1033
      ((__m128i *)y8)[i] = _mm_packs_epi16(_mm_srai_epi16(((__m128i *)y)[j],3),_mm_srai_epi16(((__m128i *)y)[j+1],3));
1034 1035 1036
  else
    for (i=0,j=0; i<(3*(n2>>4))+1; i++,j+=2)
      ((__m128i *)y8)[i] = _mm_packs_epi16(_mm_srai_epi16(((__m128i *)y)[j],3),_mm_srai_epi16(((__m128i *)y)[j+1],4));
1037

1038
  yp128 = (__m128i*)y8;
1039

1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
#elif defined(__arm__)

  int32x4_t avg=vdupq_n_s32(0);

  for (i=0; i<(3*(n>>4))+1; i++) {
    int16x8_t tmp=vabsq_s16(((int16x8_t*)y)[i]);
    avg = vqaddq_s32(avg,vaddl_s16(((int16x4_t*)&tmp)[0],((int16x4_t*)&tmp)[1]));
  }

  int32_t round_avg=(vgetq_lane_s32(avg,0)+vgetq_lane_s32(avg,1)+vgetq_lane_s32(avg,2)+vgetq_lane_s32(avg,3))/(n*3);

  //printf("avg input turbo: %d sum %d taille bloc %d\n",round_avg,round_sum,n);

  if (round_avg < 16 )
    for (i=0,j=0; i<(3*(n2>>3))+1; i++,j+=2)
      ((int8x8_t *)y8)[i] = vqmovn_s16(((int16x8_t *)y)[j]);
  else if (round_avg < 32)
    for (i=0,j=0; i<(3*(n2>>3))+1; i++,j+=2)
      ((int8x8_t *)y8)[i] = vqmovn_s16(vshrq_n_s16(((int16x8_t *)y)[j],1));
  else if (round_avg < 64 )
    for (i=0,j=0; i<(3*(n2>>3))+1; i++,j+=2)
      ((int8x8_t *)y8)[i] = vqmovn_s16(vshrq_n_s16(((int16x8_t *)y)[j],2));
  else
    for (i=0,j=0; i<(3*(n2>>3))+1; i++,j+=2)
      ((int8x8_t *)y8)[i] = vqmovn_s16(vshrq_n_s16(((int16x8_t *)y)[j],3));

  yp128 = (int8x16_t*)y8;

#endif
1069

1070
  s = systematic0;
1071 1072 1073 1074 1075 1076
  s1 = systematic1;
  s2 = systematic2;
  yp1 = yparity1;
  yp2 = yparity2;
  yp=y8;
#if 1
1077

1078
  for (i=0; i<16 ; i++ )
1079
    for (j=0; j<n2; j+=16) {
1080 1081 1082 1083
      int k=i+j;
      s[k]=*yp++;
      yp1[k]=*yp++;
      yp2[k]=*yp++;
1084 1085
    }

1086 1087
#endif
#if 0
1088 1089 1090 1091

  for (i=0; i<n2; i+=16) {
    pi2_p = &pi2tab8[iind][i];

1092
    j=pi2_p[0];
1093
#if defined(__x86_64__) || defined(__i386__)
1094 1095
    s[j]   = _mm_extract_epi8(yp128[0],0);
    yp1[j] = _mm_extract_epi8(yp128[0],1);
1096
    yp2[j] = _mm_extract_epi8(yp128[0],2);
1097

1098 1099

    j=pi2_p[1];
1100 1101
    s[j]   = _mm_extract_epi8(yp128[0],3);
    yp1[j] = _mm_extract_epi8(yp128[0],4);
1102
    yp2[j] = _mm_extract_epi8(yp128[0],5);
1103

1104 1105

    j=pi2_p[2];
1106 1107
    s[j]   = _mm_extract_epi8(yp128[0],6);
    yp1[j] = _mm_extract_epi8(yp128[0],7);
1108
    yp2[j] = _mm_extract_epi8(yp128[0],8);
1109

1110 1111

    j=pi2_p[3];
1112 1113
    s[j]   = _mm_extract_epi8(yp128[0],9);
    yp1[j] = _mm_extract_epi8(yp128[0],10);
1114
    yp2[j] = _mm_extract_epi8(yp128[0],11);
1115

1116 1117

    j=pi2_p[4];
1118 1119
    s[j]   = _mm_extract_epi8(yp128[0],12);
    yp1[j] = _mm_extract_epi8(yp128[0],13);
1120
    yp2[j] = _mm_extract_epi8(yp128[0],14);
1121

1122 1123

    j=pi2_p[5];
1124 1125
    s[j]   = _mm_extract_epi8(yp128[0],15);
    yp1[j] = _mm_extract_epi8(yp128[1],0);
1126
    yp2[j] = _mm_extract_epi8(yp128[1],1);
1127

1128 1129

    j=pi2_p[6];
1130 1131
    s[j]   = _mm_extract_epi8(yp128[1],2);
    yp1[j] = _mm_extract_epi8(yp128[1],3);
1132
    yp2[j] = _mm_extract_epi8(yp128[1],4);
1133

1134 1135

    j=pi2_p[7];
1136 1137
    s[j]   = _mm_extract_epi8(yp128[1],5);
    yp1[j] = _mm_extract_epi8(yp128[1],6);
1138
    yp2[j] = _mm_extract_epi8(yp128[1],7);
1139

1140 1141

    j=pi2_p[8];
1142 1143
    s[j]   = _mm_extract_epi8(yp128[1],8);
    yp1[j] = _mm_extract_epi8(yp128[1],9);
1144
    yp2[j] = _mm_extract_epi8(yp128[1],10);
1145

1146 1147

    j=pi2_p[9];
1148 1149
    s[j]   = _mm_extract_epi8(yp128[1],11);
    yp1[j] = _mm_extract_epi8(yp128[1],12);
1150
    yp2[j] = _mm_extract_epi8(yp128[1],13);
1151

1152 1153

    j=pi2_p[10];
1154 1155
    s[j]   = _mm_extract_epi8(yp128[1],14);
    yp1[j] = _mm_extract_epi8(yp128[1],15);
1156
    yp2[j] = _mm_extract_epi8(yp128[2],0);
1157

1158 1159

    j=pi2_p[11];
1160 1161
    s[j]   = _mm_extract_epi8(yp128[2],1);
    yp1[j] = _mm_extract_epi8(yp128[2],2);
1162
    yp2[j] = _mm_extract_epi8(yp128[2],3);
1163

1164 1165

    j=pi2_p[12];
1166 1167
    s[j]   = _mm_extract_epi8(yp128[2],4);
    yp1[j] = _mm_extract_epi8(yp128[2],5);
1168
    yp2[j] = _mm_extract_epi8(yp128[2],6);
1169

1170 1171

    j=pi2_p[13];
1172 1173
    s[j]   = _mm_extract_epi8(yp128[2],7);
    yp1[j] = _mm_extract_epi8(yp128[2],8);
1174
    yp2[j] = _mm_extract_epi8(yp128[2],9);
1175

1176 1177

    j=pi2_p[14];
1178 1179
    s[j]   = _mm_extract_epi8(yp128[2],10);
    yp1[j] = _mm_extract_epi8(yp128[2],11);
1180
    yp2[j] = _mm_extract_epi8(yp128[2],12);
1181

1182 1183

    j=pi2_p[15];
1184 1185
    s[j]   = _mm_extract_epi8(yp128[2],13);
    yp1[j] = _mm_extract_epi8(yp128[2],14);
1186 1187
    yp2[j] = _mm_extract_epi8(yp128[2],15);

1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284

#elif defined(__arm__)
    s[j]   = vgetq_lane_s8(yp128[0],0);
    yp1[j] = vgetq_lane_s8(yp128[0],1);
    yp2[j] = vgetq_lane_s8(yp128[0],2);


    j=pi2_p[1];
    s[j]   = vgetq_lane_s8(yp128[0],3);
    yp1[j] = vgetq_lane_s8(yp128[0],4);
    yp2[j] = vgetq_lane_s8(yp128[0],5);


    j=pi2_p[2];
    s[j]   = vgetq_lane_s8(yp128[0],6);
    yp1[j] = vgetq_lane_s8(yp128[0],7);
    yp2[j] = vgetq_lane_s8(yp128[0],8);


    j=pi2_p[3];
    s[j]   = vgetq_lane_s8(yp128[0],9);
    yp1[j] = vgetq_lane_s8(yp128[0],10);
    yp2[j] = vgetq_lane_s8(yp128[0],11);


    j=pi2_p[4];
    s[j]   = vgetq_lane_s8(yp128[0],12);
    yp1[j] = vgetq_lane_s8(yp128[0],13);
    yp2[j] = vgetq_lane_s8(yp128[0],14);


    j=pi2_p[5];
    s[j]   = vgetq_lane_s8(yp128[0],15);
    yp1[j] = vgetq_lane_s8(yp128[1],0);
    yp2[j] = vgetq_lane_s8(yp128[1],1);


    j=pi2_p[6];
    s[j]   = vgetq_lane_s8(yp128[1],2);
    yp1[j] = vgetq_lane_s8(yp128[1],3);
    yp2[j] = vgetq_lane_s8(yp128[1],4);


    j=pi2_p[7];
    s[j]   = vgetq_lane_s8(yp128[1],5);
    yp1[j] = vgetq_lane_s8(yp128[1],6);
    yp2[j] = vgetq_lane_s8(yp128[1],7);


    j=pi2_p[8];
    s[j]   = vgetq_lane_s8(yp128[1],8);
    yp1[j] = vgetq_lane_s8(yp128[1],9);
    yp2[j] = vgetq_lane_s8(yp128[1],10);


    j=pi2_p[9];
    s[j]   = vgetq_lane_s8(yp128[1],11);
    yp1[j] = vgetq_lane_s8(yp128[1],12);
    yp2[j] = vgetq_lane_s8(yp128[1],13);


    j=pi2_p[10];
    s[j]   = vgetq_lane_s8(yp128[1],14);
    yp1[j] = vgetq_lane_s8(yp128[1],15);
    yp2[j] = vgetq_lane_s8(yp128[2],0);


    j=pi2_p[11];
    s[j]   = vgetq_lane_s8(yp128[2],1);
    yp1[j] = vgetq_lane_s8(yp128[2],2);
    yp2[j] = vgetq_lane_s8(yp128[2],3);


    j=pi2_p[12];
    s[j]   = vgetq_lane_s8(yp128[2],4);
    yp1[j] = vgetq_lane_s8(yp128[2],5);
    yp2[j] = vgetq_lane_s8(yp128[2],6);


    j=pi2_p[13];
    s[j]   = vgetq_lane_s8(yp128[2],7);
    yp1[j] = vgetq_lane_s8(yp128[2],8);
    yp2[j] = vgetq_lane_s8(yp128[2],9);


    j=pi2_p[14];
    s[j]   = vgetq_lane_s8(yp128[2],10);
    yp1[j] = vgetq_lane_s8(yp128[2],11);
    yp2[j] = vgetq_lane_s8(yp128[2],12);


    j=pi2_p[15];
    s[j]   = vgetq_lane_s8(yp128[2],13);
    yp1[j] = vgetq_lane_s8(yp128[2],14);
    yp2[j] = vgetq_lane_s8(yp128[2],15);

#endif
1285
    yp128+=3;
1286 1287

  }
1288

1289
#endif
1290

1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306
  yp=(llr_t*)yp128;

  if (n2>n) {
    /*
    s[n]=0;s[n+1]=0;s[n+2]=0;s[n+3]=0;
    s[n+4]=0;s[n+5]=0;s[n+6]=0;s[n+7]=0;
    s1[n]=0;s1[n+1]=0;s1[n+2]=0;s1[n+3]=0;
    s1[n+4]=0;s1[n+5]=0;s1[n+6]=0;s1[n+7]=0;
    s2[n]=0;s2[n+1]=0;s2[n+2]=0;s2[n+3]=0;
    s2[n+4]=0;s2[n+5]=0;s2[n+6]=0;s2[n+7]=0;*/
    yp=(llr_t*)(y8+n);
  }

  //  printf("n=%d,n2=%d\n",n,n2);

  // Termination
1307 1308 1309 1310 1311 1312 1313
  for (i=n2; i<n2+3; i++) {
    s[i]= *yp;
    s1[i] = s[i] ;
    s2[i] = s[i];
    yp++;
    yp1[i] = *yp;
    yp++;
1314
#ifdef DEBUG_LOGMAP
1315
    printf("Term 1 (%d): %d %d\n",i,s[i],yp1[i]);
1316 1317 1318
#endif //DEBUG_LOGMAP
  }

1319 1320 1321 1322 1323 1324 1325
  for (i=n2+16; i<n2+19; i++) {
    s[i]= *yp;
    s1[i] = s[i] ;
    s2[i] = s[i];
    yp++;
    yp2[i-16] = *yp;
    yp++;
1326
#ifdef DEBUG_LOGMAP
1327
    printf("Term 2 (%d): %d %d\n",i-16,s[i],yp2[i-16]);
1328 1329 1330 1331
#endif //DEBUG_LOGMAP
  }

#ifdef DEBUG_LOGMAP
1332
  printf("\n");
1333
#endif //DEBUG_LOGMAP
1334

1335
  if (init_stats) stop_meas(init_stats);
1336 1337 1338 1339 1340 1341

  // do log_map from first parity bit

  log_map8(systematic0,yparity1,m11,m10,alpha,beta,ext,n2,0,F,offset8_flag,alpha_stats,beta_stats,gamma_stats,ext_stats);

  while (iteration_cnt++ < max_iterations) {
1342

1343
#ifdef DEBUG_LOGMAP
1344
    printf("\n*******************ITERATION %d (n %d, n2 %d), ext %p\n\n",iteration_cnt,n,n2,ext);
1345
#endif //DEBUG_LOGMAP
1346

1347
    if (intl1_stats) start_meas(intl1_stats);
1348
    pi4_p=pi4tab8[iind];
1349 1350

    for (i=0; i<(n2>>4); i++) { // steady-state portion
1351
#if defined(__x86_64__) || defined(__i386__)
1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],0);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],1);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],2);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],3);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],4);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],5);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],6);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],7);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],8);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],9);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],10);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],11);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],12);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],13);
      tmp=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],14);
      ((__m128i *)systematic2)[i]=_mm_insert_epi8(tmp,((llr_t*)ext)[*pi4_p++],15);
1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385
#elif defined(__arm__)
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,0);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,1);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,2);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,3);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,4);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,5);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,6);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,7);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,8);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,9);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,10);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,11);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,12);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,13);
      tmp=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,14);
      ((int8x16_t *)systematic2)[i]=vsetq_lane_s8(((llr_t*)ext)[*pi4_p++],tmp,15);
#endif
1386 1387
    }

1388
    if (intl1_stats) stop_meas(intl1_stats);
1389 1390

    // do log_map from second parity bit
1391 1392 1393 1394 1395 1396

    log_map8(systematic2,yparity2,m11,m10,alpha,beta,ext2,n2,1,F,offset8_flag,alpha_stats,beta_stats,gamma_stats,ext_stats);



    pi5_p=pi5tab8[iind];
1397
    uint16_t decoded_bytes_interl[6144/16] __attribute__((aligned(16)));
1398

1399
    if ((n2&0x7f) == 0) {  // n2 is a multiple of 128 bits
1400
      for (i=0; i<(n2>>4); i++) {
1401
#if defined(__x86_64__) || defined(__i386__)
1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],0);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],1);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],2);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],3);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],4);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],5);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],6);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],7);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],8);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],9);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],10);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],11);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],12);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],13);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],14);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],15);
        decoded_bytes_interl[i]=(uint16_t) _mm_movemask_epi8(_mm_cmpgt_epi8(tmp,zeros));
        ((__m128i *)systematic1)[i] = _mm_adds_epi8(_mm_subs_epi8(tmp,((__m128i*)ext)[i]),((__m128i *)systematic0)[i]);
1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441
#elif defined(__arm__)
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,0);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,1);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,2);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,3);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,4);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,5);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,6);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,7);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,8);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,9);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,10);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,11);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,12);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,13);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,14);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,15);
	uint64x2_t Mask= vpaddlq_u32(vpaddlq_u16(vpaddlq_u8(vandq_u8(vcgtq_s8(tmp,zeros), Powers))));
	vst1q_lane_u8(&((uint8_t*)&decoded_bytes[i])[0], (uint8x16_t)Mask, 0);
	vst1q_lane_u8(&((uint8_t*)&decoded_bytes[i])[1], (uint8x16_t)Mask, 8);
	((int8x16_t *)systematic1)[i] = vqaddq_s8(vqsubq_s8(tmp,((int8x16_t*)ext)[i]),((int8x16_t *)systematic0)[i]);
#endif
1442
      }
1443

1444 1445
    } else {
      for (i=0; i<(n2>>4); i++) {
1446
#if defined(__x86_64__) || defined(__i386__)
1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],0);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],1);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],2);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],3);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],4);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],5);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],6);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],7);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],8);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],9);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],10);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],11);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],12);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],13);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],14);
        tmp=_mm_insert_epi8(tmp,ext2[*pi5_p++],15);
        tmp128[i] = _mm_adds_epi8(((__m128i *)ext2)[i],((__m128i *)systematic2)[i]);

        ((__m128i *)systematic1)[i] = _mm_adds_epi8(_mm_subs_epi8(tmp,((__m128i*)ext)[i]),((__m128i *)systematic0)[i]);
1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488
#elif defined(__arm__)
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,0);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,1);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,2);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,3);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,4);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,5);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,6);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,7);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,8);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,9);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,10);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,11);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,12);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,13);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,14);
        tmp=vsetq_lane_s8(ext2[*pi5_p++],tmp,15);
        tmp128[i] = vqaddq_s8(((int8x16_t *)ext2)[i],((int8x16_t *)systematic2)[i]);

        ((int8x16_t *)systematic1)[i] = vqaddq_s8(vqsubq_s8(tmp,((int8x16_t*)ext)[i]),((int8x16_t *)systematic0)[i]);

#endif 
     }
1489
    }
1490

1491 1492
    // Check if we decoded the block
    if (iteration_cnt>1) {
1493
      if (intl2_stats) start_meas(intl2_stats);
1494 1495 1496

      if ((n2&0x7f) == 0) {  // n2 is a multiple of 128 bits

1497 1498
        // re-order the decoded bits in theregular order
        // as it is presently ordered as 16 sequential columns
1499
#if defined(__x86_64__) || defined(__i386__)
1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512
        __m128i* dbytes=(__m128i*)decoded_bytes_interl;
        __m128i shuffle=SHUFFLE16(7,6,5,4,3,2,1,0);
        __m128i mask  __attribute__((aligned(16)));
        int n_128=n2>>7;

        for (i=0; i<n_128; i++) {
          mask=_mm_set1_epi16(1);
          __m128i tmp __attribute__((aligned(16)));
          tmp=_mm_shuffle_epi8(dbytes[i],shuffle);
          __m128i tmp2 __attribute__((aligned(16))) ;

          tmp2=_mm_and_si128(tmp,mask);
          tmp2=_mm_cmpeq_epi16(tmp2,mask);
1513
	  //	  printf("decoded_bytes %p\n",decoded_bytes);
1514 1515 1516 1517 1518 1519 1520 1521 1522 1523
          decoded_bytes[n_128*0+i]=(uint8_t) _mm_movemask_epi8(_mm_packs_epi16(tmp2,zeros));
          int j;

          for (j=1; j<16; j++) {
            mask=_mm_slli_epi16(mask,1);
            tmp2=_mm_and_si128(tmp,mask);
            tmp2=_mm_cmpeq_epi16(tmp2,mask);
            decoded_bytes[n_128*j +i]=(uint8_t) _mm_movemask_epi8(_mm_packs_epi16(tmp2,zeros));
          }
        }
1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543
#elif defined(__arm__)
        uint8x16_t* dbytes=(uint8x16_t*)decoded_bytes_interl;
        uint16x8_t mask  __attribute__((aligned(16)));
        int n_128=n2>>7;

        for (i=0; i<n_128; i++) {
          mask=vdupq_n_u16(1);
          uint8x16_t tmp __attribute__((aligned(16)));
          tmp=vcombine_u8(vrev64_u8(((uint8x8_t*)&dbytes[i])[1]),vrev64_u8(((uint8x8_t*)&dbytes[i])[0]));
          vst1q_lane_u8(&decoded_bytes[n_128*0+i],(uint8x16_t)vpaddlq_u32(vpaddlq_u16(vpaddlq_u8(vandq_u8(tmp, Powers)))),0);

          int j;

          for (j=1; j<16; j++) {
            mask=vshlq_n_u16(mask,1);
	    vst1q_lane_u8(&decoded_bytes[n_128*0+i],(uint8x16_t)vpaddlq_u32(vpaddlq_u16(vpaddlq_u8(vandq_u8(tmp, Powers)))),0);
          }
        }

#endif
1544 1545 1546 1547
      } else {
        pi6_p=pi6tab8[iind];

        for (i=0; i<(n2>>4); i++) {
1548
#if defined(__x86_64__) || defined(__i386__)
1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],7);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],6);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],5);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],4);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],3);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],2);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],1);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],0);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],15);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],14);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],13);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],12);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],11);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],10);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],9);
          tmp=_mm_insert_epi8(tmp, ((llr_t *)tmp128)[*pi6_p++],8);
          tmp=_mm_cmpgt_epi8(tmp,zeros);
          ((uint16_t *)decoded_bytes)[i]=(uint16_t)_mm_movemask_epi8(tmp);
1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587
#elif defined(__arm__)
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,7);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,6);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,5);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,4);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,3);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,2);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,1);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,0);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,15);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,14);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,13);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,12);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,11);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,10);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,9);
          tmp=vsetq_lane_s8(((llr_t *)tmp128)[*pi6_p++],tmp,8);
	  uint64x2_t Mask= vpaddlq_u32(vpaddlq_u16(vpaddlq_u8(vandq_u8(vcgtq_s8(tmp,zeros), Powers))));
	  vst1q_lane_u8(&((uint8_t*)&decoded_bytes[i])[0], (uint8x16_t)Mask, 0);
	  vst1q_lane_u8(&((uint8_t*)&decoded_bytes[i])[1], (uint8x16_t)Mask, 8);
#endif
1588
        }
1589
      }
1590

1591 1592
      // check the CRC
      oldcrc= *((unsigned int *)(&decoded_bytes[(n>>3)-crc_len]));
1593

1594
      switch (crc_type) {
1595 1596 1597 1598 1599 1600 1601 1602 1603 1604

      case CRC24_A:
        oldcrc&=0x00ffffff;
        crc = crc24a(&decoded_bytes[F>>3],
                     n-24-F)>>8;
        temp=((uint8_t *)&crc)[2];
        ((uint8_t *)&crc)[2] = ((uint8_t *)&crc)[0];
        ((uint8_t *)&crc)[0] = temp;
        break;

1605
      case CRC24_B:
1606 1607 1608 1609 1610 1611 1612 1613
        oldcrc&=0x00ffffff;
        crc = crc24b(decoded_bytes,
                     n-24)>>8;
        temp=((uint8_t *)&crc)[2];
        ((uint8_t *)&crc)[2] = ((uint8_t *)&crc)[0];
        ((uint8_t *)&crc)[0] = temp;
        break;

1614
      case CRC16:
1615 1616 1617 1618 1619
        oldcrc&=0x0000ffff;
        crc = crc16(decoded_bytes,
                    n-16)>>16;
        break;

1620
      case CRC8:
1621 1622 1623 1624 1625
        oldcrc&=0x000000ff;
        crc = crc8(decoded_bytes,
                   n-8)>>24;
        break;

1626
      default:
1627 1628 1629
        printf("FATAL: 3gpplte_turbo_decoder_sse.c: Unknown CRC\n");
        return(255);
        break;
1630
      }
1631

1632
      if (intl2_stats) stop_meas(intl2_stats);
1633

1634
      if (crc == oldcrc) {
1635
        return(iteration_cnt);
1636 1637
      }
    }
1638 1639

    // do a new iteration if it is not yet decoded
1640 1641
    if (iteration_cnt < max_iterations) {
      log_map8(systematic1,yparity1,m11,m10,alpha,beta,ext,n2,0,F,offset8_flag,alpha_stats,beta_stats,gamma_stats,ext_stats);
1642
#if defined(__x86_64__) || defined(__i386__)
1643 1644 1645
      __m128i* ext_128=(__m128i*) ext;
      __m128i* s1_128=(__m128i*) systematic1;
      __m128i* s0_128=(__m128i*) systematic0;
1646 1647 1648 1649 1650
#elif defined(__arm__)
      int8x16_t* ext_128=(int8x16_t*) ext;
      int8x16_t* s1_128=(int8x16_t*) systematic1;
      int8x16_t* s0_128=(int8x16_t*) systematic0;
#endif
1651
      int myloop=n2>>4;
1652 1653

      for (i=0; i<myloop; i++) {
1654
#if defined(__x86_64__) || defined(__i386__)
1655
        *ext_128=_mm_adds_epi8(_mm_subs_epi8(*ext_128,*s1_128++),*s0_128++);
1656 1657 1658
#elif defined(__arm__)
        *ext_128=vqaddq_s8(vqsubq_s8(*ext_128,*s1_128++),*s0_128++);
#endif
1659 1660
        ext_128++;
      }
1661 1662
    }
  }
1663

1664
  return(iteration_cnt);
1665

1666
}