3gpplte_turbo_decoder_sse_8bit.c 58.6 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_common.h"
#include "PHY/CODING/coding_defs.h"
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#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
void init_td8(void)
853
{
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
    short y2,
902
    unsigned char *decoded_bytes,
903
    unsigned char *decoded_bytes2,
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918
    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)
{

919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941
  /*  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)));

942

943 944
  //  int *pi2_p,*pi4_p,*pi5_p,*pi6_p;
  int *pi4_p,*pi5_p,*pi6_p;
945
  llr_t *s,*s1,*s2,*yp1,*yp2,*yp;
946

947 948 949
  unsigned int i,j,iind;//,pi;
  unsigned char iteration_cnt=0;
  unsigned int crc,oldcrc,crc_len;
950
  uint8_t temp;
951 952
#if defined(__x86_64__) || defined(__i386__)
  __m128i *yp128;
953 954
  __m128i tmp128[(n+8)>>3];
  __m128i tmp, zeros=_mm_setzero_si128();
955 956 957 958 959 960 961 962 963 964
#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
965 966 967 968

  int offset8_flag=0;

  if (crc_type > 3) {
969
    printf("Illegal crc length!\n");
970 971 972 973
    return 255;
  }


974
  if (init_stats) start_meas(init_stats);
975 976 977 978 979


  if ((n&15)>0) {
    n2 = n+8;
    offset8_flag=1;
980
  } else
981 982 983
    n2 = n;


984
  for (iind=0; iind < 188 && f1f2mat[iind].nb_bits != n; iind++);
985

986
  if ( iind == 188 ) {
987
    printf("Illegal frame length!\n");
988 989
    return 255;
  }
990

991 992 993 994 995
  switch (crc_type) {
  case CRC24_A:
  case CRC24_B:
    crc_len=3;
    break;
996

997 998 999
  case CRC16:
    crc_len=2;
    break;
1000

1001 1002 1003
  case CRC8:
    crc_len=1;
    break;
1004 1005 1006 1007 1008

  default:
    crc_len=3;
  }

1009 1010
#if defined(__x86_64__) || defined(__i386__)

1011
  // note: this makes valgrind freak
1012
  __m128i avg=_mm_set1_epi32(0);
1013 1014

  for (i=0; i<(3*(n>>4))+1; i++) {
1015 1016 1017 1018
    __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);
  }
1019

1020
  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);
1021

1022
  //printf("avg input turbo: %d sum %d taille bloc %d\n",round_avg,round_sum,n);
1023

1024 1025
  if (round_avg < 16 )
    for (i=0,j=0; i<(3*(n2>>4))+1; i++,j+=2)
1026
      ((__m128i *)y8)[i] = _mm_packs_epi16(((__m128i *)y)[j],((__m128i *)y)[j+1]);
1027 1028
  else if (round_avg < 32)
    for (i=0,j=0; i<(3*(n2>>4))+1; i++,j+=2)
1029 1030
      ((__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 )
1031
    for (i=0,j=0; i<(3*(n2>>4))+1; i++,j+=2)
1032
      ((__m128i *)y8)[i] = _mm_packs_epi16(_mm_srai_epi16(((__m128i *)y)[j],2),_mm_srai_epi16(((__m128i *)y)[j+1],2));
1033
  else if (round_avg < 128)
1034
    for (i=0,j=0; i<(3*(n2>>4))+1; i++,j+=2)
1035
      ((__m128i *)y8)[i] = _mm_packs_epi16(_mm_srai_epi16(((__m128i *)y)[j],3),_mm_srai_epi16(((__m128i *)y)[j+1],3));
1036 1037 1038
  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));
1039

1040
  yp128 = (__m128i*)y8;
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 1069 1070
#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
1071

1072
  s = systematic0;
1073 1074 1075 1076 1077 1078
  s1 = systematic1;
  s2 = systematic2;
  yp1 = yparity1;
  yp2 = yparity2;
  yp=y8;
#if 1
1079

1080
  for (i=0; i<16 ; i++ )
1081
    for (j=0; j<n2; j+=16) {
1082 1083 1084 1085
      int k=i+j;
      s[k]=*yp++;
      yp1[k]=*yp++;
      yp2[k]=*yp++;
1086 1087
    }

1088 1089
#endif
#if 0
1090 1091 1092 1093

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

1094
    j=pi2_p[0];
1095
#if defined(__x86_64__) || defined(__i386__)
1096 1097
    s[j]   = _mm_extract_epi8(yp128[0],0);
    yp1[j] = _mm_extract_epi8(yp128[0],1);
1098
    yp2[j] = _mm_extract_epi8(yp128[0],2);
1099

1100 1101

    j=pi2_p[1];
1102 1103
    s[j]   = _mm_extract_epi8(yp128[0],3);
    yp1[j] = _mm_extract_epi8(yp128[0],4);
1104
    yp2[j] = _mm_extract_epi8(yp128[0],5);
1105

1106 1107

    j=pi2_p[2];
1108 1109
    s[j]   = _mm_extract_epi8(yp128[0],6);
    yp1[j] = _mm_extract_epi8(yp128[0],7);
1110
    yp2[j] = _mm_extract_epi8(yp128[0],8);
1111

1112 1113

    j=pi2_p[3];
1114 1115
    s[j]   = _mm_extract_epi8(yp128[0],9);
    yp1[j] = _mm_extract_epi8(yp128[0],10);
1116
    yp2[j] = _mm_extract_epi8(yp128[0],11);
1117

1118 1119

    j=pi2_p[4];
1120 1121
    s[j]   = _mm_extract_epi8(yp128[0],12);
    yp1[j] = _mm_extract_epi8(yp128[0],13);
1122
    yp2[j] = _mm_extract_epi8(yp128[0],14);
1123

1124 1125

    j=pi2_p[5];
1126 1127
    s[j]   = _mm_extract_epi8(yp128[0],15);
    yp1[j] = _mm_extract_epi8(yp128[1],0);
1128
    yp2[j] = _mm_extract_epi8(yp128[1],1);
1129

1130 1131

    j=pi2_p[6];
1132 1133
    s[j]   = _mm_extract_epi8(yp128[1],2);
    yp1[j] = _mm_extract_epi8(yp128[1],3);
1134
    yp2[j] = _mm_extract_epi8(yp128[1],4);
1135

1136 1137

    j=pi2_p[7];
1138 1139
    s[j]   = _mm_extract_epi8(yp128[1],5);
    yp1[j] = _mm_extract_epi8(yp128[1],6);
1140
    yp2[j] = _mm_extract_epi8(yp128[1],7);
1141

1142 1143

    j=pi2_p[8];
1144 1145
    s[j]   = _mm_extract_epi8(yp128[1],8);
    yp1[j] = _mm_extract_epi8(yp128[1],9);
1146
    yp2[j] = _mm_extract_epi8(yp128[1],10);
1147

1148 1149

    j=pi2_p[9];
1150 1151
    s[j]   = _mm_extract_epi8(yp128[1],11);
    yp1[j] = _mm_extract_epi8(yp128[1],12);
1152
    yp2[j] = _mm_extract_epi8(yp128[1],13);
1153

1154 1155

    j=pi2_p[10];
1156 1157
    s[j]   = _mm_extract_epi8(yp128[1],14);
    yp1[j] = _mm_extract_epi8(yp128[1],15);
1158
    yp2[j] = _mm_extract_epi8(yp128[2],0);
1159

1160 1161

    j=pi2_p[11];
1162 1163
    s[j]   = _mm_extract_epi8(yp128[2],1);
    yp1[j] = _mm_extract_epi8(yp128[2],2);
1164
    yp2[j] = _mm_extract_epi8(yp128[2],3);
1165

1166 1167

    j=pi2_p[12];
1168 1169
    s[j]   = _mm_extract_epi8(yp128[2],4);
    yp1[j] = _mm_extract_epi8(yp128[2],5);
1170
    yp2[j] = _mm_extract_epi8(yp128[2],6);
1171

1172 1173

    j=pi2_p[13];
1174 1175
    s[j]   = _mm_extract_epi8(yp128[2],7);
    yp1[j] = _mm_extract_epi8(yp128[2],8);
1176
    yp2[j] = _mm_extract_epi8(yp128[2],9);
1177

1178 1179

    j=pi2_p[14];
1180 1181
    s[j]   = _mm_extract_epi8(yp128[2],10);
    yp1[j] = _mm_extract_epi8(yp128[2],11);
1182
    yp2[j] = _mm_extract_epi8(yp128[2],12);
1183

1184 1185

    j=pi2_p[15];
1186 1187
    s[j]   = _mm_extract_epi8(yp128[2],13);
    yp1[j] = _mm_extract_epi8(yp128[2],14);
1188 1189
    yp2[j] = _mm_extract_epi8(yp128[2],15);

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 1285 1286

#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
1287
    yp128+=3;
1288 1289

  }
1290

1291
#endif
1292

1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308
  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
1309 1310 1311 1312 1313 1314 1315
  for (i=n2; i<n2+3; i++) {
    s[i]= *yp;
    s1[i] = s[i] ;
    s2[i] = s[i];
    yp++;
    yp1[i] = *yp;
    yp++;
1316
#ifdef DEBUG_LOGMAP
1317
    printf("Term 1 (%d): %d %d\n",i,s[i],yp1[i]);
1318 1319 1320
#endif //DEBUG_LOGMAP
  }

1321 1322 1323 1324 1325 1326 1327
  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++;
1328
#ifdef DEBUG_LOGMAP
1329
    printf("Term 2 (%d): %d %d\n",i-16,s[i],yp2[i-16]);
1330 1331 1332 1333
#endif //DEBUG_LOGMAP
  }

#ifdef DEBUG_LOGMAP
1334
  printf("\n");
1335
#endif //DEBUG_LOGMAP
1336

1337
  if (init_stats) stop_meas(init_stats);
1338 1339 1340 1341 1342 1343

  // 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) {
1344

1345
#ifdef DEBUG_LOGMAP
1346
    printf("\n*******************ITERATION %d (n %d, n2 %d), ext %p\n\n",iteration_cnt,n,n2,ext);
1347
#endif //DEBUG_LOGMAP
1348

1349
    if (intl1_stats) start_meas(intl1_stats);
1350
    pi4_p=pi4tab8[iind];
1351 1352

    for (i=0; i<(n2>>4); i++) { // steady-state portion
1353
#if defined(__x86_64__) || defined(__i386__)
1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369
      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);
1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387
#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
1388 1389
    }

1390
    if (intl1_stats) stop_meas(intl1_stats);
1391 1392

    // do log_map from second parity bit
1393 1394 1395 1396 1397 1398

    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];
1399
    uint16_t decoded_bytes_interl[6144/16] __attribute__((aligned(16)));
1400

1401
    if ((n2&0x7f) == 0) {  // n2 is a multiple of 128 bits
1402
      for (i=0; i<(n2>>4); i++) {
1403
#if defined(__x86_64__) || defined(__i386__)
1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421
        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]);
1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443
#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
1444
      }
1445

1446 1447
    } else {
      for (i=0; i<(n2>>4); i++) {
1448
#if defined(__x86_64__) || defined(__i386__)
1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467
        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[*