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openairinterface5g/openair1/PHY/CODING/3gpplte_turbo_decoder_sse_16bit.c
T
Florian Kaltenberger 4a930b7d0e adding GPL preamble to all files in openair1/PHY/CODING 
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5217 818b1a75-f10b-46b9-bf7c-635c3b92a50f
2014-03-26 17:36:34 +00:00

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/*******************************************************************************
Eurecom OpenAirInterface
Copyright(c) 1999 - 2014 Eurecom
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later version
This program is distributed in the hope it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
The full GNU General Public License is included in this distribution in
the file called "COPYING".
Contact Information
Openair Admin: openair_admin@eurecom.fr
Openair Tech : openair_tech@eurecom.fr
Forums : http://forums.eurecom.fsr/openairinterface
Address : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France
*******************************************************************************/
/* file: 3gpplte_turbo_decoder_sse_16bit.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)
date: 21.10.2009
Note: This version of the routine currently requires SSE2,SSSE3 and SSE4.1 equipped computers. It uses 16-bit inputs for
LLRS and uses 16-bit arithmetic for the internal computations!
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 16bit code
*/
///
///
#include "emmintrin.h"
#include "smmintrin.h"
#ifndef TEST_DEBUG
#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
//#define DEBUG_LOGMAP
typedef int16_t llr_t; // internal decoder LLR data is 16-bit fixed
typedef int16_t channel_t;
#define MAX 256
void log_map16(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);
void compute_gamma16(llr_t* m11,llr_t* m10,llr_t* systematic, channel_t* y_parity, unsigned short frame_length,unsigned char term_flag);
void compute_alpha16(llr_t*alpha,llr_t *beta, llr_t* m11,llr_t* m10, unsigned short frame_length,unsigned char F);
void compute_beta16(llr_t*alpha, llr_t* beta,llr_t* m11,llr_t* m10, unsigned short frame_length,unsigned char F,int offset8_flag);
void compute_ext16(llr_t* alpha,llr_t* beta,llr_t* m11,llr_t* m10,llr_t* extrinsic, llr_t* ap, unsigned short frame_length);
void log_map16(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) {
#ifdef DEBUG_LOGMAP
msg("log_map, frame_length %d\n",frame_length);
#endif
start_meas(gamma_stats) ; compute_gamma16(m11,m10,systematic,y_parity,frame_length,term_flag) ; stop_meas(gamma_stats);
start_meas(alpha_stats) ; compute_alpha16(alpha,beta,m11,m10,frame_length,F) ; stop_meas(alpha_stats);
start_meas(beta_stats) ; compute_beta16(alpha,beta,m11,m10,frame_length,F,offset8_flag) ; stop_meas(beta_stats);
start_meas(ext_stats) ; compute_ext16(alpha,beta,m11,m10,ext,systematic,frame_length) ; stop_meas(ext_stats);
}
void compute_gamma16(llr_t* m11,llr_t* m10,llr_t* systematic,channel_t* y_parity,
unsigned short frame_length,unsigned char term_flag) {
int k,K1;
__m128i *systematic128 = (__m128i *)systematic;
__m128i *y_parity128 = (__m128i *)y_parity;
__m128i *m10_128 = (__m128i *)m10;
__m128i *m11_128 = (__m128i *)m11;
#ifdef DEBUG_LOGMAP
msg("compute_gamma, %p,%p,%p,%p,framelength %d\n",m11,m10,systematic,y_parity,frame_length);
#endif
K1=frame_length>>3;
for (k=0;k<K1;k++) {
m11_128[k] = _mm_srai_epi16(_mm_adds_epi16(systematic128[k],y_parity128[k]),1);
m10_128[k] = _mm_srai_epi16(_mm_subs_epi16(systematic128[k],y_parity128[k]),1);
/*
printf("gamma %d: s %d,%d,%d,%d,%d,%d,%d,%d\n",
k,
(int16_t)_mm_extract_epi16(systematic128[k],0),
(int16_t)_mm_extract_epi16(systematic128[k],1),
(int16_t)_mm_extract_epi16(systematic128[k],2),
(int16_t)_mm_extract_epi16(systematic128[k],3),
(int16_t)_mm_extract_epi16(systematic128[k],4),
(int16_t)_mm_extract_epi16(systematic128[k],5),
(int16_t)_mm_extract_epi16(systematic128[k],6),
(int16_t)_mm_extract_epi16(systematic128[k],7));
printf("gamma %d: yp %d,%d,%d,%d,%d,%d,%d,%d\n",
k,
(int16_t)_mm_extract_epi16(y_parity128[k],0),
(int16_t)_mm_extract_epi16(y_parity128[k],1),
(int16_t)_mm_extract_epi16(y_parity128[k],2),
(int16_t)_mm_extract_epi16(y_parity128[k],3),
(int16_t)_mm_extract_epi16(y_parity128[k],4),
(int16_t)_mm_extract_epi16(y_parity128[k],5),
(int16_t)_mm_extract_epi16(y_parity128[k],6),
(int16_t)_mm_extract_epi16(y_parity128[k],7));
printf("gamma %d: m11 %d,%d,%d,%d,%d,%d,%d,%d\n",
k,
(int16_t)_mm_extract_epi16(m11_128[k],0),
(int16_t)_mm_extract_epi16(m11_128[k],1),
(int16_t)_mm_extract_epi16(m11_128[k],2),
(int16_t)_mm_extract_epi16(m11_128[k],3),
(int16_t)_mm_extract_epi16(m11_128[k],4),
(int16_t)_mm_extract_epi16(m11_128[k],5),
(int16_t)_mm_extract_epi16(m11_128[k],6),
(int16_t)_mm_extract_epi16(m11_128[k],7));
printf("gamma %d: m10 %d,%d,%d,%d,%d,%d,%d,%d\n",
k,
(int16_t)_mm_extract_epi16(m10_128[k],0),
(int16_t)_mm_extract_epi16(m10_128[k],1),
(int16_t)_mm_extract_epi16(m10_128[k],2),
(int16_t)_mm_extract_epi16(m10_128[k],3),
(int16_t)_mm_extract_epi16(m10_128[k],4),
(int16_t)_mm_extract_epi16(m10_128[k],5),
(int16_t)_mm_extract_epi16(m10_128[k],6),
(int16_t)_mm_extract_epi16(m10_128[k],7));
*/
}
// Termination
m11_128[k] = _mm_srai_epi16(_mm_adds_epi16(systematic128[k+term_flag],y_parity128[k]),1);
m10_128[k] = _mm_srai_epi16(_mm_subs_epi16(systematic128[k+term_flag],y_parity128[k]),1);
// printf("gamma (term): %d,%d, %d,%d, %d,%d\n",m11[k<<3],m10[k<<3],m11[1+(k<<3)],m10[1+(k<<3)],m11[2+(k<<3)],m10[2+(k<<3)]);
}
#define L 40
void compute_alpha16(llr_t* alpha,llr_t* beta,llr_t* m_11,llr_t* m_10,unsigned short frame_length,unsigned char F) {
int k,l,l2,K1,rerun_flag=0;
__m128i *alpha128=(__m128i *)alpha,*alpha_ptr;
__m128i a0,a1,a2,a3,a4,a5,a6,a7,*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;
l2 = L>>3;
K1 = (frame_length>>3);
for (l=K1;;l=l2,rerun_flag=1) {
alpha128 = (__m128i *)alpha;
if (rerun_flag == 0) {
alpha128[0] = _mm_set_epi16(-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,0);
alpha128[1] = _mm_set_epi16(-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2);
alpha128[2] = _mm_set_epi16(-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2);
alpha128[3] = _mm_set_epi16(-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2);
alpha128[4] = _mm_set_epi16(-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2);
alpha128[5] = _mm_set_epi16(-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2);
alpha128[6] = _mm_set_epi16(-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2);
alpha128[7] = _mm_set_epi16(-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2,-MAX/2);
}
else {
//set initial alpha in columns 1-7 from final alpha from last run in columns 0-6
alpha128[0] = _mm_slli_si128(alpha128[frame_length],2);
alpha128[1] = _mm_slli_si128(alpha128[1+frame_length],2);
alpha128[2] = _mm_slli_si128(alpha128[2+frame_length],2);
alpha128[3] = _mm_slli_si128(alpha128[3+frame_length],2);
alpha128[4] = _mm_slli_si128(alpha128[4+frame_length],2);
alpha128[5] = _mm_slli_si128(alpha128[5+frame_length],2);
alpha128[6] = _mm_slli_si128(alpha128[6+frame_length],2);
alpha128[7] = _mm_slli_si128(alpha128[7+frame_length],2);
// set initial alpha in column 0 to (0,-MAX/2,...,-MAX/2)
alpha[8] = -MAX/2;
alpha[16] = -MAX/2;
alpha[24] = -MAX/2;
alpha[32] = -MAX/2;
alpha[40] = -MAX/2;
alpha[48] = -MAX/2;
alpha[56] = -MAX/2;
}
alpha_ptr = &alpha128[0];
m11p = (__m128i*)m_11;
m10p = (__m128i*)m_10;
for (k=0;
k<l;
k++){
a1=_mm_load_si128(&alpha_ptr[1]);
a3=_mm_load_si128(&alpha_ptr[3]);
a5=_mm_load_si128(&alpha_ptr[5]);
a7=_mm_load_si128(&alpha_ptr[7]);
m_b0 = _mm_adds_epi16(a1,*m11p); // m11
m_b4 = _mm_subs_epi16(a1,*m11p); // m00=-m11
m_b1 = _mm_subs_epi16(a3,*m10p); // m01=-m10
m_b5 = _mm_adds_epi16(a3,*m10p); // m10
m_b2 = _mm_adds_epi16(a5,*m10p); // m10
m_b6 = _mm_subs_epi16(a5,*m10p); // m01=-m10
m_b3 = _mm_subs_epi16(a7,*m11p); // m00=-m11
m_b7 = _mm_adds_epi16(a7,*m11p); // m11
a0=_mm_load_si128(&alpha_ptr[0]);
a2=_mm_load_si128(&alpha_ptr[2]);
a4=_mm_load_si128(&alpha_ptr[4]);
a6=_mm_load_si128(&alpha_ptr[6]);
new0 = _mm_subs_epi16(a0,*m11p); // m00=-m11
new4 = _mm_adds_epi16(a0,*m11p); // m11
new1 = _mm_adds_epi16(a2,*m10p); // m10
new5 = _mm_subs_epi16(a2,*m10p); // m01=-m10
new2 = _mm_subs_epi16(a4,*m10p); // m01=-m10
new6 = _mm_adds_epi16(a4,*m10p); // m10
new3 = _mm_adds_epi16(a6,*m11p); // m11
new7 = _mm_subs_epi16(a6,*m11p); // m00=-m11
a0 = _mm_max_epi16(m_b0,new0);
a1 = _mm_max_epi16(m_b1,new1);
a2 = _mm_max_epi16(m_b2,new2);
a3 = _mm_max_epi16(m_b3,new3);
a4 = _mm_max_epi16(m_b4,new4);
a5 = _mm_max_epi16(m_b5,new5);
a6 = _mm_max_epi16(m_b6,new6);
a7 = _mm_max_epi16(m_b7,new7);
alpha_max = _mm_max_epi16(a0,a1);
alpha_max = _mm_max_epi16(alpha_max,a2);
alpha_max = _mm_max_epi16(alpha_max,a3);
alpha_max = _mm_max_epi16(alpha_max,a4);
alpha_max = _mm_max_epi16(alpha_max,a5);
alpha_max = _mm_max_epi16(alpha_max,a6);
alpha_max = _mm_max_epi16(alpha_max,a7);
alpha_ptr+=8;
m11p++;
m10p++;
alpha_ptr[0] = _mm_subs_epi16(a0,alpha_max);
alpha_ptr[1] = _mm_subs_epi16(a1,alpha_max);
alpha_ptr[2] = _mm_subs_epi16(a2,alpha_max);
alpha_ptr[3] = _mm_subs_epi16(a3,alpha_max);
alpha_ptr[4] = _mm_subs_epi16(a4,alpha_max);
alpha_ptr[5] = _mm_subs_epi16(a5,alpha_max);
alpha_ptr[6] = _mm_subs_epi16(a6,alpha_max);
alpha_ptr[7] = _mm_subs_epi16(a7,alpha_max);
}
if (rerun_flag==1)
break;
}
}
void compute_beta16(llr_t* alpha,llr_t* beta,llr_t *m_11,llr_t* m_10,unsigned short frame_length,unsigned char F,int offset8_flag) {
int k,rerun_flag=0;
__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;
__m128i beta_max;
int16_t m11,m10,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;
llr_t beta0,beta1;
#ifdef DEBUG_LOGMAP
msg("compute_beta, %p,%p,%p,%p,framelength %d,F %d\n",
beta,m_11,m_10,alpha,frame_length,F);
#endif
// termination for beta initialization
// printf("beta init: offset8 %d\n",offset8_flag);
m11=(int16_t)m_11[2+frame_length];
m10=(int16_t)m_10[2+frame_length];
// printf("m11,m10 %d,%d\n",m11,m10);
beta0 = -m11;//M0T_TERM;
beta1 = m11;//M1T_TERM;
m11=(int16_t)m_11[1+frame_length];
m10=(int16_t)m_10[1+frame_length];
// printf("m11,m10 %d,%d\n",m11,m10);
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];
// printf("m11,m10 %d,%d (%p)\n",m11,m10,m_11+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;
for (rerun_flag=0;;rerun_flag=1) {
beta_ptr = (__m128i*)&beta[frame_length<<3];
alpha128 = (__m128i*)&alpha[0];
if (rerun_flag == 0) {
beta_ptr[0] = alpha128[(frame_length)];
beta_ptr[1] = alpha128[1+(frame_length)];
beta_ptr[2] = alpha128[2+(frame_length)];
beta_ptr[3] = alpha128[3+(frame_length)];
beta_ptr[4] = alpha128[4+(frame_length)];
beta_ptr[5] = alpha128[5+(frame_length)];
beta_ptr[6] = alpha128[6+(frame_length)];
beta_ptr[7] = alpha128[7+(frame_length)];
}
else {
beta128 = (__m128i*)&beta[0];
beta_ptr[0] = _mm_srli_si128(beta128[0],2);
beta_ptr[1] = _mm_srli_si128(beta128[1],2);
beta_ptr[2] = _mm_srli_si128(beta128[2],2);
beta_ptr[3] = _mm_srli_si128(beta128[3],2);
beta_ptr[4] = _mm_srli_si128(beta128[4],2);
beta_ptr[5] = _mm_srli_si128(beta128[5],2);
beta_ptr[6] = _mm_srli_si128(beta128[6],2);
beta_ptr[7] = _mm_srli_si128(beta128[7],2);
}
beta_ptr[0] = _mm_insert_epi16(beta_ptr[0],beta0_16,7);
beta_ptr[1] = _mm_insert_epi16(beta_ptr[1],beta1_16,7);
beta_ptr[2] = _mm_insert_epi16(beta_ptr[2],beta2_16,7);
beta_ptr[3] = _mm_insert_epi16(beta_ptr[3],beta3_16,7);
beta_ptr[4] = _mm_insert_epi16(beta_ptr[4],beta4_16,7);
beta_ptr[5] = _mm_insert_epi16(beta_ptr[5],beta5_16,7);
beta_ptr[6] = _mm_insert_epi16(beta_ptr[6],beta6_16,7);
beta_ptr[7] = _mm_insert_epi16(beta_ptr[7],beta7_16,7);
int loopval=((rerun_flag==0)?0:((frame_length-L)>>3));
for (k=(frame_length>>3)-1;k>=loopval;k--){
m11_128=((__m128i*)m_11)[k];
m10_128=((__m128i*)m_10)[k];
m_b0 = _mm_adds_epi16(beta_ptr[4],m11_128); //m11
m_b1 = _mm_subs_epi16(beta_ptr[4],m11_128); //m00
m_b2 = _mm_subs_epi16(beta_ptr[5],m10_128); //m01
m_b3 = _mm_adds_epi16(beta_ptr[5],m10_128); //m10
m_b4 = _mm_adds_epi16(beta_ptr[6],m10_128); //m10
m_b5 = _mm_subs_epi16(beta_ptr[6],m10_128); //m01
m_b6 = _mm_subs_epi16(beta_ptr[7],m11_128); //m00
m_b7 = _mm_adds_epi16(beta_ptr[7],m11_128); //m11
new0 = _mm_subs_epi16(beta_ptr[0],m11_128); //m00
new1 = _mm_adds_epi16(beta_ptr[0],m11_128); //m11
new2 = _mm_adds_epi16(beta_ptr[1],m10_128); //m10
new3 = _mm_subs_epi16(beta_ptr[1],m10_128); //m01
new4 = _mm_subs_epi16(beta_ptr[2],m10_128); //m01
new5 = _mm_adds_epi16(beta_ptr[2],m10_128); //m10
new6 = _mm_adds_epi16(beta_ptr[3],m11_128); //m11
new7 = _mm_subs_epi16(beta_ptr[3],m11_128); //m00
beta_ptr-=8;
beta_ptr[0] = _mm_max_epi16(m_b0,new0);
beta_ptr[1] = _mm_max_epi16(m_b1,new1);
beta_ptr[2] = _mm_max_epi16(m_b2,new2);
beta_ptr[3] = _mm_max_epi16(m_b3,new3);
beta_ptr[4] = _mm_max_epi16(m_b4,new4);
beta_ptr[5] = _mm_max_epi16(m_b5,new5);
beta_ptr[6] = _mm_max_epi16(m_b6,new6);
beta_ptr[7] = _mm_max_epi16(m_b7,new7);
beta_max = _mm_max_epi16(beta_ptr[0],beta_ptr[1]);
beta_max = _mm_max_epi16(beta_max ,beta_ptr[2]);
beta_max = _mm_max_epi16(beta_max ,beta_ptr[3]);
beta_max = _mm_max_epi16(beta_max ,beta_ptr[4]);
beta_max = _mm_max_epi16(beta_max ,beta_ptr[5]);
beta_max = _mm_max_epi16(beta_max ,beta_ptr[6]);
beta_max = _mm_max_epi16(beta_max ,beta_ptr[7]);
beta_ptr[0] = _mm_subs_epi16(beta_ptr[0],beta_max);
beta_ptr[1] = _mm_subs_epi16(beta_ptr[1],beta_max);
beta_ptr[2] = _mm_subs_epi16(beta_ptr[2],beta_max);
beta_ptr[3] = _mm_subs_epi16(beta_ptr[3],beta_max);
beta_ptr[4] = _mm_subs_epi16(beta_ptr[4],beta_max);
beta_ptr[5] = _mm_subs_epi16(beta_ptr[5],beta_max);
beta_ptr[6] = _mm_subs_epi16(beta_ptr[6],beta_max);
beta_ptr[7] = _mm_subs_epi16(beta_ptr[7],beta_max);
}
if (rerun_flag==1)
break;
}
}
void compute_ext16(llr_t* alpha,llr_t* beta,llr_t* m_11,llr_t* m_10,llr_t* ext, llr_t* systematic,unsigned short frame_length) {
__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;
int k;
//
// LLR computation, 8 consequtive bits per loop
//
#ifdef DEBUG_LOGMAP
msg("compute_ext, %p, %p, %p, %p, %p, %p ,framelength %d\n",alpha,beta,m_11,m_10,ext,systematic,frame_length);
#endif
alpha_ptr = alpha128;
beta_ptr = &beta128[8];
for (k=0;k<(frame_length>>3);k++){
m11_128 = (__m128i*)&m_11[k<<3];
m10_128 = (__m128i*)&m_10[k<<3];
ext_128 = (__m128i*)&ext[k<<3];
/*
printf("EXT %03d\n",k);
print_shorts("a0:",&alpha_ptr[0]);
print_shorts("a1:",&alpha_ptr[1]);
print_shorts("a2:",&alpha_ptr[2]);
print_shorts("a3:",&alpha_ptr[3]);
print_shorts("a4:",&alpha_ptr[4]);
print_shorts("a5:",&alpha_ptr[5]);
print_shorts("a6:",&alpha_ptr[6]);
print_shorts("a7:",&alpha_ptr[7]);
print_shorts("b0:",&beta_ptr[0]);
print_shorts("b1:",&beta_ptr[1]);
print_shorts("b2:",&beta_ptr[2]);
print_shorts("b3:",&beta_ptr[3]);
print_shorts("b4:",&beta_ptr[4]);
print_shorts("b5:",&beta_ptr[5]);
print_shorts("b6:",&beta_ptr[6]);
print_shorts("b7:",&beta_ptr[7]);
*/
m00_4 = _mm_adds_epi16(alpha_ptr[7],beta_ptr[3]); //ALPHA_BETA_4m00;
m11_4 = _mm_adds_epi16(alpha_ptr[7],beta_ptr[7]); //ALPHA_BETA_4m11;
m00_3 = _mm_adds_epi16(alpha_ptr[6],beta_ptr[7]); //ALPHA_BETA_3m00;
m11_3 = _mm_adds_epi16(alpha_ptr[6],beta_ptr[3]); //ALPHA_BETA_3m11;
m00_2 = _mm_adds_epi16(alpha_ptr[1],beta_ptr[4]); //ALPHA_BETA_2m00;
m11_2 = _mm_adds_epi16(alpha_ptr[1],beta_ptr[0]); //ALPHA_BETA_2m11;
m11_1 = _mm_adds_epi16(alpha_ptr[0],beta_ptr[4]); //ALPHA_BETA_1m11;
m00_1 = _mm_adds_epi16(alpha_ptr[0],beta_ptr[0]); //ALPHA_BETA_1m00;
m01_4 = _mm_adds_epi16(alpha_ptr[5],beta_ptr[6]); //ALPHA_BETA_4m01;
m10_4 = _mm_adds_epi16(alpha_ptr[5],beta_ptr[2]); //ALPHA_BETA_4m10;
m01_3 = _mm_adds_epi16(alpha_ptr[4],beta_ptr[2]); //ALPHA_BETA_3m01;
m10_3 = _mm_adds_epi16(alpha_ptr[4],beta_ptr[6]); //ALPHA_BETA_3m10;
m01_2 = _mm_adds_epi16(alpha_ptr[3],beta_ptr[1]); //ALPHA_BETA_2m01;
m10_2 = _mm_adds_epi16(alpha_ptr[3],beta_ptr[5]); //ALPHA_BETA_2m10;
m10_1 = _mm_adds_epi16(alpha_ptr[2],beta_ptr[1]); //ALPHA_BETA_1m10;
m01_1 = _mm_adds_epi16(alpha_ptr[2],beta_ptr[5]); //ALPHA_BETA_1m01;
/*
print_shorts("m11_1:",&m11_1);
print_shorts("m11_2:",&m11_2);
print_shorts("m11_3:",&m11_3);
print_shorts("m11_4:",&m11_4);
print_shorts("m00_1:",&m00_1);
print_shorts("m00_2:",&m00_2);
print_shorts("m00_3:",&m00_3);
print_shorts("m00_4:",&m00_4);
print_shorts("m10_1:",&m10_1);
print_shorts("m10_2:",&m10_2);
print_shorts("m10_3:",&m10_3);
print_shorts("m10_4:",&m10_4);
print_shorts("m01_1:",&m01_1);
print_shorts("m01_2:",&m01_2);
print_shorts("m01_3:",&m01_3);
print_shorts("m01_4:",&m01_4);
*/
m01_1 = _mm_max_epi16(m01_1,m01_2);
m01_1 = _mm_max_epi16(m01_1,m01_3);
m01_1 = _mm_max_epi16(m01_1,m01_4);
m00_1 = _mm_max_epi16(m00_1,m00_2);
m00_1 = _mm_max_epi16(m00_1,m00_3);
m00_1 = _mm_max_epi16(m00_1,m00_4);
m10_1 = _mm_max_epi16(m10_1,m10_2);
m10_1 = _mm_max_epi16(m10_1,m10_3);
m10_1 = _mm_max_epi16(m10_1,m10_4);
m11_1 = _mm_max_epi16(m11_1,m11_2);
m11_1 = _mm_max_epi16(m11_1,m11_3);
m11_1 = _mm_max_epi16(m11_1,m11_4);
// print_shorts("m11_1:",&m11_1);
m01_1 = _mm_subs_epi16(m01_1,*m10_128);
m00_1 = _mm_subs_epi16(m00_1,*m11_128);
m10_1 = _mm_adds_epi16(m10_1,*m10_128);
m11_1 = _mm_adds_epi16(m11_1,*m11_128);
// print_shorts("m10_1:",&m10_1);
// print_shorts("m11_1:",&m11_1);
m01_1 = _mm_max_epi16(m01_1,m00_1);
m10_1 = _mm_max_epi16(m10_1,m11_1);
// print_shorts("m01_1:",&m01_1);
// print_shorts("m10_1:",&m10_1);
*ext_128 = _mm_subs_epi16(m10_1,m01_1);
/*
print_shorts("ext:",ext_128);
print_shorts("m11:",m11_128);
print_shorts("m10:",m10_128);
print_shorts("m10_1:",&m10_1);
print_shorts("m01_1:",&m01_1);
print_shorts("syst:",systematic_128);
*/
alpha_ptr+=8;
beta_ptr+=8;
}
}
//int pi2[n],pi3[n+8],pi5[n+8],pi4[n+8],pi6[n+8],
int *pi2tab16[188],*pi5tab16[188],*pi4tab16[188],*pi6tab16[188];
void free_td16() {
int ind;
for (ind=0;ind<188;ind++) {
free(pi2tab16[ind]);
free(pi5tab16[ind]);
free(pi4tab16[ind]);
free(pi6tab16[ind]);
}
}
void init_td16() {
int ind,i,i2,i3,j,n,pi,pi3;
short * base_interleaver;
for (ind=0;ind<188;ind++) {
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
pi2tab16[ind] = mxMalloc((n+8)*sizeof(int));
pi5tab16[ind] = mxMalloc((n+8)*sizeof(int));
pi4tab16[ind] = mxMalloc((n+8)*sizeof(int));
pi6tab16[ind] = mxMalloc((n+8)*sizeof(int));
#else
pi2tab16[ind] = malloc((n+8)*sizeof(int));
pi5tab16[ind] = malloc((n+8)*sizeof(int));
pi4tab16[ind] = malloc((n+8)*sizeof(int));
pi6tab16[ind] = malloc((n+8)*sizeof(int));
#endif
for (i=i2=0;i2<8;i2++) {
j=i2;
for (i3=0;i3<(n>>3);i3++,i++,j+=8) {
// if (j>=n)
// j-=(n-1);
pi2tab16[ind][i] = j;
// printf("pi2[%d] = %d\n",i,j);
}
}
for (i=0;i<n;i++) {
pi = base_interleaver[i];//(unsigned int)threegpplte_interleaver(f1,f2,n);
pi3 = pi2tab16[ind][pi];
pi4tab16[ind][pi2tab16[ind][i]] = pi3;
pi5tab16[ind][pi3] = pi2tab16[ind][i];
pi6tab16[ind][pi] = pi2tab16[ind][i];
}
}
}
unsigned char phy_threegpplte_turbo_decoder16(short *y,
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) {
/* 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 */
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)));
int *pi2_p,*pi4_p,*pi5_p,*pi6_p;
llr_t *s,*s1,*s2,*yp1,*yp2,*yp;
__m128i *yp128;
unsigned int i,j,iind;//,pi;
unsigned char iteration_cnt=0;
unsigned int crc,oldcrc,crc_len;
uint8_t temp;
__m128i tmp, zeros=_mm_setzero_si128();
register __m128i tmpe;
int offset8_flag=0;
if (crc_type > 3) {
msg("Illegal crc length!\n");
return 255;
}
start_meas(init_stats);
for (iind=0;f1f2mat[iind].nb_bits!=n && iind <188; iind++);
if ( iind == 188 ) {
msg("Illegal frame length!\n");
return 255;
}
switch (crc_type) {
case CRC24_A:
case CRC24_B:
crc_len=3;
break;
case CRC16:
crc_len=2;
break;
case CRC8:
crc_len=1;
break;
default:
crc_len=3;
}
yp128 = (__m128i*)y;
s = systematic0;
s1 = systematic1;
s2 = systematic2;
yp1 = yparity1;
yp2 = yparity2;
for (i=0;i<n;i+=8) {
pi2_p = &pi2tab16[iind][i];
j=pi2_p[0];
tmpe = _mm_load_si128(yp128);
s[j] = _mm_extract_epi16(tmpe,0);
yp1[j] = _mm_extract_epi16(tmpe,1);
yp2[j] = _mm_extract_epi16(tmpe,2);
// printf("init: j %d, s[j] %d yp1[j] %d yp2[j] %d\n",j,s[j],yp1[j],yp2[j]);
j=pi2_p[1];
s[j] = _mm_extract_epi16(tmpe,3);
yp1[j] = _mm_extract_epi16(tmpe,4);
yp2[j] = _mm_extract_epi16(tmpe,5);
// printf("init: j %d, s[j] %d yp1[j] %d yp2[j] %d\n",j,s[j],yp1[j],yp2[j]);
j=pi2_p[2];
s[j] = _mm_extract_epi16(tmpe,6);
yp1[j] = _mm_extract_epi16(tmpe,7);
tmpe = _mm_load_si128(&yp128[1]);
yp2[j] = _mm_extract_epi16(tmpe,0);
// printf("init: j %d, s[j] %d yp1[j] %d yp2[j] %d\n",j,s[j],yp1[j],yp2[j]);
j=pi2_p[3];
s[j] = _mm_extract_epi16(tmpe,1);
yp1[j] = _mm_extract_epi16(tmpe,2);
yp2[j] = _mm_extract_epi16(tmpe,3);
// printf("init: j %d, s[j] %d yp1[j] %d yp2[j] %d\n",j,s[j],yp1[j],yp2[j]);
j=pi2_p[4];
s[j] = _mm_extract_epi16(tmpe,4);
yp1[j] = _mm_extract_epi16(tmpe,5);
yp2[j] = _mm_extract_epi16(tmpe,6);
// printf("init: j %d, s[j] %d yp1[j] %d yp2[j] %d\n",j,s[j],yp1[j],yp2[j]);
j=pi2_p[5];
s[j] = _mm_extract_epi16(tmpe,7);
tmpe = _mm_load_si128(&yp128[2]);
yp1[j] = _mm_extract_epi16(tmpe,0);
yp2[j] = _mm_extract_epi16(tmpe,1);
// printf("init: j %d, s[j] %d yp1[j] %d yp2[j] %d\n",j,s[j],yp1[j],yp2[j]);
j=pi2_p[6];
s[j] = _mm_extract_epi16(tmpe,2);
yp1[j] = _mm_extract_epi16(tmpe,3);
yp2[j] = _mm_extract_epi16(tmpe,4);
// printf("init: j %d, s[j] %d yp1[j] %d yp2[j] %d\n",j,s[j],yp1[j],yp2[j]);
j=pi2_p[7];
s[j] = _mm_extract_epi16(tmpe,5);
yp1[j] = _mm_extract_epi16(tmpe,6);
yp2[j] = _mm_extract_epi16(tmpe,7);
// printf("init: j %d, s[j] %d yp1[j] %d yp2[j] %d\n",j,s[j],yp1[j],yp2[j]);
yp128+=3;
}
yp=(llr_t*)yp128;
// Termination
for (i=n;i<n+3;i++) {
s[i]= *yp; s1[i] = s[i] ; s2[i] = s[i]; yp++;
yp1[i] = *yp; yp++;
#ifdef DEBUG_LOGMAP
msg("Term 1 (%d): %d %d\n",i,s[i],yp1[i]);
#endif //DEBUG_LOGMAP
}
for (i=n+8;i<n+11;i++) {
s[i]= *yp; s1[i] = s[i] ; s2[i] = s[i]; yp++;
yp2[i-8] = *yp; yp++;
#ifdef DEBUG_LOGMAP
msg("Term 2 (%d): %d %d\n",i-3,s[i],yp2[i-8]);
#endif //DEBUG_LOGMAP
}
#ifdef DEBUG_LOGMAP
msg("\n");
#endif //DEBUG_LOGMAP
stop_meas(init_stats);
// do log_map from first parity bit
log_map16(systematic0,yparity1,m11,m10,alpha,beta,ext,n,0,F,offset8_flag,alpha_stats,beta_stats,gamma_stats,ext_stats);
while (iteration_cnt++ < max_iterations) {
#ifdef DEBUG_LOGMAP
printf("\n*******************ITERATION %d (n %d), ext %p\n\n",iteration_cnt,n,ext);
#endif //DEBUG_LOGMAP
start_meas(intl1_stats);
pi4_p=pi4tab16[iind];
for (i=0;i<(n>>3);i++) { // steady-state portion
((__m128i *)systematic2)[i]=_mm_insert_epi16(((__m128i *)systematic2)[i],((llr_t*)ext)[*pi4_p++],0);
((__m128i *)systematic2)[i]=_mm_insert_epi16(((__m128i *)systematic2)[i],((llr_t*)ext)[*pi4_p++],1);
((__m128i *)systematic2)[i]=_mm_insert_epi16(((__m128i *)systematic2)[i],((llr_t*)ext)[*pi4_p++],2);
((__m128i *)systematic2)[i]=_mm_insert_epi16(((__m128i *)systematic2)[i],((llr_t*)ext)[*pi4_p++],3);
((__m128i *)systematic2)[i]=_mm_insert_epi16(((__m128i *)systematic2)[i],((llr_t*)ext)[*pi4_p++],4);
((__m128i *)systematic2)[i]=_mm_insert_epi16(((__m128i *)systematic2)[i],((llr_t*)ext)[*pi4_p++],5);
((__m128i *)systematic2)[i]=_mm_insert_epi16(((__m128i *)systematic2)[i],((llr_t*)ext)[*pi4_p++],6);
((__m128i *)systematic2)[i]=_mm_insert_epi16(((__m128i *)systematic2)[i],((llr_t*)ext)[*pi4_p++],7);
}
stop_meas(intl1_stats);
// do log_map from second parity bit
log_map16(systematic2,yparity2,m11,m10,alpha,beta,ext2,n,1,F,offset8_flag,alpha_stats,beta_stats,gamma_stats,ext_stats);
pi5_p=pi5tab16[iind];
for (i=0;i<(n>>3);i++) {
tmp=_mm_insert_epi16(tmp,ext2[*pi5_p++],0);
tmp=_mm_insert_epi16(tmp,ext2[*pi5_p++],1);
tmp=_mm_insert_epi16(tmp,ext2[*pi5_p++],2);
tmp=_mm_insert_epi16(tmp,ext2[*pi5_p++],3);
tmp=_mm_insert_epi16(tmp,ext2[*pi5_p++],4);
tmp=_mm_insert_epi16(tmp,ext2[*pi5_p++],5);
tmp=_mm_insert_epi16(tmp,ext2[*pi5_p++],6);
tmp=_mm_insert_epi16(tmp,ext2[*pi5_p++],7);
((__m128i *)systematic1)[i] = _mm_adds_epi16(_mm_subs_epi16(tmp,((__m128i*)ext)[i]),((__m128i *)systematic0)[i]);
}
if (iteration_cnt>1) {
start_meas(intl2_stats);
pi6_p=pi6tab16[iind];
for (i=0;i<(n>>3);i++) {
tmp=_mm_insert_epi16(tmp, ((llr_t*)ext2)[*pi6_p++],7);
tmp=_mm_insert_epi16(tmp, ((llr_t*)ext2)[*pi6_p++],6);
tmp=_mm_insert_epi16(tmp, ((llr_t*)ext2)[*pi6_p++],5);
tmp=_mm_insert_epi16(tmp, ((llr_t*)ext2)[*pi6_p++],4);
tmp=_mm_insert_epi16(tmp, ((llr_t*)ext2)[*pi6_p++],3);
tmp=_mm_insert_epi16(tmp, ((llr_t*)ext2)[*pi6_p++],2);
tmp=_mm_insert_epi16(tmp, ((llr_t*)ext2)[*pi6_p++],1);
tmp=_mm_insert_epi16(tmp, ((llr_t*)ext2)[*pi6_p++],0);
tmp=_mm_cmpgt_epi8(_mm_packs_epi16(tmp,zeros),zeros);
decoded_bytes[i]=(unsigned char)_mm_movemask_epi8(tmp);
}
}
// check status on output
if (iteration_cnt>1) {
oldcrc= *((unsigned int *)(&decoded_bytes[(n>>3)-crc_len]));
switch (crc_type) {
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;
case CRC24_B:
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;
case CRC16:
oldcrc&=0x0000ffff;
crc = crc16(decoded_bytes,
n-16)>>16;
break;
case CRC8:
oldcrc&=0x000000ff;
crc = crc8(decoded_bytes,
n-8)>>24;
break;
default:
printf("FATAL: 3gpplte_turbo_decoder_sse.c: Unknown CRC\n");
exit(-1);
break;
}
stop_meas(intl2_stats);
if ((crc == oldcrc) && (crc!=0)) {
return(iteration_cnt);
}
}
// do log_map from first parity bit
if (iteration_cnt < max_iterations) {
log_map16(systematic1,yparity1,m11,m10,alpha,beta,ext,n,0,F,offset8_flag,alpha_stats,beta_stats,gamma_stats,ext_stats);
__m128i* ext_128=(__m128i*) ext;
__m128i* s1_128=(__m128i*) systematic1;
__m128i* s0_128=(__m128i*) systematic0;
int myloop=n>>3;
for (i=0;i<myloop;i++) {
*ext_128=_mm_adds_epi16(_mm_subs_epi16(*ext_128,*s1_128++),*s0_128++);
ext_128++;
}
}
}
// printf("crc %x, oldcrc %x\n",crc,oldcrc);
_mm_empty();
_m_empty();
return(iteration_cnt);
}
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