Commit 261a7407 authored by Florian Kaltenberger's avatar Florian Kaltenberger

adding multi-segment encoder

parent 85b9db74
......@@ -575,6 +575,7 @@ short *ldpc_decoder(short *msgChannel,short block_length,short No_iteration,doub
int encode_parity_check_part_orig(unsigned char *c,unsigned char *d, short BG,short Zc,short Kb,short block_length);
int ldpc_encoder_orig(unsigned char *test_input,unsigned char *channel_input,short block_length,int nom_rate,int denom_rate,unsigned char gen_code);
int ldpc_encoder_optim(unsigned char *test_input,unsigned char *channel_input,short block_length,int nom_rate,int denom_rate,time_stats_t *tinput,time_stats_t *tprep,time_stats_t *tparity,time_stats_t *toutput);
int ldpc_encoder_optim_8seg(unsigned char **test_input,unsigned char **channel_input,short block_length,int nom_rate,int denom_rate,int n_segments,time_stats_t *tinput,time_stats_t *tprep,time_stats_t *tparity,time_stats_t *toutput);
uint8_t check_crc(uint8_t *decoded_bytes, uint16_t len, uint8_t crc_type);
#endif
......@@ -212,7 +212,9 @@ int ldpc_encoder_optim(unsigned char *test_input,unsigned char *channel_input,sh
}
AssertFatal(Zc>0,"no valid Zc found for block length %d\n",block_length);
#ifdef DEBUG_LDPC
printf("ldpc_encoder_optim: BG %d, Zc %d, Kb %d, block_length %d\n",BG,Zc,Kb,block_length);
#endif
if ((Zc&31) > 0) simd_size = 16;
else simd_size = 32;
......@@ -276,3 +278,201 @@ int ldpc_encoder_optim(unsigned char *test_input,unsigned char *channel_input,sh
stop_meas(toutput);
return 0;
}
int ldpc_encoder_optim_8seg(unsigned char **test_input,unsigned char **channel_input,short block_length,int nom_rate,int denom_rate,int n_segments,time_stats_t *tinput,time_stats_t *tprep,time_stats_t *tparity,time_stats_t *toutput)
{
short BG,Zc,Kb,nrows,ncols;
int i,i1,j;
int no_punctured_columns,removed_bit;
//Table of possible lifting sizes
short lift_size[51]= {2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,18,20,22,24,26,28,30,32,36,40,44,48,52,56,60,64,72,80,88,96,104,112,120,128,144,160,176,192,208,224,240,256,288,320,352,384};
char temp;
int simd_size;
#ifdef __AVX2__
__m256i shufmask = _mm256_set_epi64x(0x0303030303030303, 0x0202020202020202,0x0101010101010101, 0x0000000000000000);
__m256i andmask = _mm256_set1_epi64x(0x8040201008040201); // every 8 bits -> 8 bytes, pattern repeats.
__m256i zero256 = _mm256_setzero_si256();
__m256i masks[8];
register __m256i c256;
masks[0] = _mm256_set1_epi8(0x1);
masks[1] = _mm256_set1_epi8(0x2);
masks[2] = _mm256_set1_epi8(0x4);
masks[3] = _mm256_set1_epi8(0x8);
masks[4] = _mm256_set1_epi8(0x10);
masks[5] = _mm256_set1_epi8(0x20);
masks[6] = _mm256_set1_epi8(0x40);
masks[7] = _mm256_set1_epi8(0x80);
#endif
AssertFatal(n_segments>0&&n_segments<=8,"0 < n_segments %d <= 8\n",n_segments);
//determine number of bits in codeword
//if (block_length>3840)
{
BG=1;
Kb = 22;
nrows=46; //parity check bits
ncols=22; //info bits
}
/*else if (block_length<=3840)
{
BG=2;
nrows=42; //parity check bits
ncols=10; // info bits
if (block_length>640)
Kb = 10;
else if (block_length>560)
Kb = 9;
else if (block_length>192)
Kb = 8;
else
Kb = 6;
}*/
//find minimum value in all sets of lifting size
Zc=0;
for (i1=0; i1 < 51; i1++)
{
if (lift_size[i1] >= (double) block_length/Kb)
{
Zc = lift_size[i1];
//printf("%d\n",Zc);
break;
}
}
#ifdef DEBUG_LDPC
LOG_D(PHY,"ldpc_encoder_optim_8seg: BG %d, Zc %d, Kb %d, block_length %d, segments %d\n",BG,Zc,Kb,block_length,n_segments);
LOG_D(PHY,"ldpc_encoder_optim_8seg: PDU (seg 0) %x %x %x %x\n",test_input[0][0],test_input[0][1],test_input[0][2],test_input[0][3]);
#endif
AssertFatal(Zc>0,"no valid Zc found for block length %d\n",block_length);
if ((Zc&31) > 0) simd_size = 16;
else simd_size = 32;
unsigned char c[22*Zc] __attribute__((aligned(32))); //padded input, unpacked, max size
unsigned char d[46*Zc] __attribute__((aligned(32))); //coded parity part output, unpacked, max size
unsigned char c_extension[2*22*Zc*simd_size] __attribute__((aligned(32))); //double size matrix of c
// calculate number of punctured bits
no_punctured_columns=(int)((nrows-2)*Zc+block_length-block_length*3)/Zc;
removed_bit=(nrows-no_punctured_columns-2) * Zc+block_length-(int)(block_length*3);
// printf("%d\n",no_punctured_columns);
// printf("%d\n",removed_bit);
// unpack input
memset(c,0,sizeof(unsigned char) * ncols * Zc);
memset(d,0,sizeof(unsigned char) * nrows * Zc);
start_meas(tinput);
#if 0
for (i=0; i<block_length; i++) {
for (j=0; j<n_segments; j++) {
temp = (test_input[j][i/8]&(1<<(i&7)))>>(i&7);
//printf("c(%d,%d)=%d\n",j,i,temp);
c[i] |= (temp << j);
}
}
#else
#ifdef __AVX2__
for (i=0; i<block_length>>5; i++) {
c256 = _mm256_and_si256(_mm256_cmpeq_epi8(_mm256_andnot_si256(_mm256_shuffle_epi8(_mm256_set1_epi32(((uint32_t*)test_input[0])[i]), shufmask),andmask),zero256),masks[0]);
for (j=1; j<n_segments; j++) {
c256 = _mm256_or_si256(_mm256_and_si256(_mm256_cmpeq_epi8(_mm256_andnot_si256(_mm256_shuffle_epi8(_mm256_set1_epi32(((uint32_t*)test_input[j])[i]), shufmask),andmask),zero256),masks[j]),c256);
}
((__m256i *)c)[i] = c256;
}
for (i=(block_length>>5)<<5;i<block_length;i++) {
for (j=0; j<n_segments; j++) {
temp = (test_input[j][i/8]&(1<<(i&7)))>>(i&7);
//printf("c(%d,%d)=%d\n",j,i,temp);
c[i] |= (temp << j);
}
}
#else
AssertFatal(1==0,"Need AVX2 for this\n");
#endif
#endif
stop_meas(tinput);
if ((BG==1 && Zc>176) || (BG==2 && Zc>64)) {
// extend matrix
start_meas(tprep);
for (i1=0; i1 < ncols; i1++)
{
memcpy(&c_extension[2*i1*Zc], &c[i1*Zc], Zc*sizeof(unsigned char));
memcpy(&c_extension[(2*i1+1)*Zc], &c[i1*Zc], Zc*sizeof(unsigned char));
}
for (i1=1;i1<simd_size;i1++) {
memcpy(&c_extension[(2*ncols*Zc*i1)], &c_extension[i1], (2*ncols*Zc*sizeof(unsigned char))-i1);
// memset(&c_extension[(2*ncols*Zc*i1)],0,i1);
/*
printf("shift %d: ",i1);
for (int j=0;j<64;j++) printf("%d ",c_extension[(2*ncols*Zc*i1)+j]);
printf("\n");
*/
}
stop_meas(tprep);
//parity check part
start_meas(tparity);
encode_parity_check_part_optim(c_extension, d, BG, Zc, Kb);
stop_meas(tparity);
}
else {
if (encode_parity_check_part_orig(c, d, BG, Zc, Kb, block_length)!=0) {
printf("Problem with encoder\n");
return(-1);
}
}
start_meas(toutput);
// information part and puncture columns
/*
memcpy(&channel_input[0], &c[2*Zc], (block_length-2*Zc)*sizeof(unsigned char));
memcpy(&channel_input[block_length-2*Zc], &d[0], ((nrows-no_punctured_columns) * Zc-removed_bit)*sizeof(unsigned char));
*/
#ifdef __AVX2__
if ((((2*Zc)&31) == 0) && (((block_length-(2*Zc))&31) == 0)) {
//AssertFatal(((2*Zc)&31) == 0,"2*Zc needs to be a multiple of 32 for now\n");
//AssertFatal(((block_length-(2*Zc))&31) == 0,"block_length-(2*Zc) needs to be a multiple of 32 for now\n");
uint32_t l1 = (block_length-(2*Zc))>>5;
uint32_t l2 = ((nrows-no_punctured_columns) * Zc-removed_bit)>>5;
__m256i *c256p = (__m256i *)&c[2*Zc];
__m256i *d256p = (__m256i *)&d[0];
// if (((block_length-(2*Zc))&31)>0) l1++;
for (i=0;i<l1;i++)
for (j=0;j<n_segments;j++) ((__m256i *)channel_input[j])[i] = _mm256_and_si256(_mm256_srai_epi16(c256p[i],j),masks[0]);
// if ((((nrows-no_punctured_columns) * Zc-removed_bit)&31)>0) l2++;
for (i1=0;i1<l2;i1++,i++)
for (j=0;j<n_segments;j++) ((__m256i *)channel_input[j])[i] = _mm256_and_si256(_mm256_srai_epi16(d256p[i1],j),masks[0]);
}
else {
#ifdef DEBUG_LDPC
LOG_W(PHY,"using non-optimized version\n");
#endif
// do non-SIMD version
for (i=0;i<(block_length-2*Zc);i++)
for (j=0; j<n_segments; j++)
channel_input[j][i] = (c[2*Zc+i]>>j)&1;
for (i=0;i<((nrows-no_punctured_columns) * Zc-removed_bit);i++)
for (j=0; j<n_segments; j++)
channel_input[j][block_length-2*Zc+i] = (d[i]>>j)&1;
}
#else
AssertFatal(1==0,"Need AVX2 for now\n");
#endif
stop_meas(toutput);
return 0;
}
......@@ -588,7 +588,7 @@ int dlsch_encoding(PHY_VARS_eNB *eNB,
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_ENCODING, VCD_FUNCTION_IN);
A = dlsch->harq_processes[harq_pid]->TBS; //6228
printf("Encoder: A: %d frame.subframe %d.%d \n",A, frame,subframe);
//printf("Encoder: A: %d frame.subframe %d.%d \n",A, frame,subframe);
mod_order = get_Qm(dlsch->harq_processes[harq_pid]->mcs);
if(dlsch->harq_processes[harq_pid]->mimo_mode == TM7)
......@@ -722,9 +722,10 @@ int dlsch_encoding(PHY_VARS_eNB *eNB,
#endif
//ldpc_encoder_orig((unsigned char*)dlsch->harq_processes[harq_pid]->c[r],&dlsch->harq_processes[harq_pid]->d[r][96],Kr,1,3,0);
//ldpc_encoder((unsigned char*)dlsch->harq_processes[harq_pid]->c[r],&dlsch->harq_processes[harq_pid]->d[r][96],Kr,1,3);
ldpc_encoder_optim((unsigned char*)dlsch->harq_processes[harq_pid]->c[r],(unsigned char*)&dlsch->harq_processes[harq_pid]->d[r][96],Kr,1,3,NULL,NULL,NULL,NULL);
//ldpc_encoder_optim((unsigned char*)dlsch->harq_processes[harq_pid]->c[r],(unsigned char*)&dlsch->harq_processes[harq_pid]->d[r][96],Kr,1,3,NULL,NULL,NULL,NULL);
}
//ldpc_encoder_multi_segment(dlsch->harq_processes[harq_pid]->c,d_tmp,Kr,rate,dlsch->harq_processes[harq_pid]->C);
ldpc_encoder_optim_8seg(dlsch->harq_processes[harq_pid]->c,d_tmp,Kr,1,3,dlsch->harq_processes[harq_pid]->C,NULL,NULL,NULL,NULL);
stop_meas(te_stats);
#endif
/*printf("end ldpc encoder -- output\n");
......
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