/* * 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 * the OAI Public License, Version 1.1 (the "License"); you may not use this file * 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 */ /*!\file ldpc_encoder.c * \brief Defines the LDPC encoder * \author Florian Kaltenberger, Raymond Knopp, Kien le Trung (Eurecom) * \email openair_tech@eurecom.fr * \date 27-03-2018 * \version 1.0 * \note * \warning */ #include #include #include #include #include "defs.h" #include "assertions.h" #include "openair1/PHY/CODING/nrLDPC_defs.h" #include "ldpc_generate_coefficient.c" int ldpc_encoder_orig(unsigned char *test_input,unsigned char *channel_input,int Zc,int Kb,short block_length, short BG,unsigned char gen_code) { unsigned char c[22*384]; //padded input, unpacked, max size unsigned char d[68*384]; //coded output, unpacked, max size unsigned char channel_temp,temp; short *Gen_shift_values, *no_shift_values, *pointer_shift_values; short nrows = 46;//parity check bits short ncols = 22;//info bits int i,i1,i2,i3,i4,i5,temp_prime,var; int no_punctured_columns,removed_bit,rate=3; int nind=0; int indlist[1000]; int indlist2[1000]; //determine number of bits in codeword //if (block_length>3840) if (BG==1) { nrows=46; //parity check bits ncols=22; //info bits rate=3; } //else if (block_length<=3840) else if (BG==2) { //BG=2; nrows=42; //parity check bits ncols=10; // info bits rate=5; } Gen_shift_values=choose_generator_matrix(BG,Zc); if (Gen_shift_values==NULL) { printf("ldpc_encoder_orig: could not find generator matrix\n"); return(-1); } //printf("ldpc_encoder_orig: BG %d, Zc %d, Kb %d\n",BG, Zc, Kb); // load base graph of generator matrix if (BG==1) { no_shift_values=(short *) no_shift_values_BG1; pointer_shift_values=(short *) pointer_shift_values_BG1; } else if (BG==2) { no_shift_values=(short *) no_shift_values_BG2; pointer_shift_values=(short *) pointer_shift_values_BG2; } else { AssertFatal(0,"BG %d is not supported yet\n",BG); } no_punctured_columns=(int)((nrows-2)*Zc+block_length-block_length*rate)/Zc; removed_bit=(nrows-no_punctured_columns-2) * Zc+block_length-(block_length*rate); //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); for (i=0; i>7&1; c[i]=(test_input[i/8]&(128>>(i&7)))>>(7-(i&7)); } // parity check part if (gen_code==1) { char fname[100]; sprintf(fname,"ldpc_BG%d_Zc%d_byte.c",BG,Zc); FILE *fd=fopen(fname,"w"); AssertFatal(fd!=NULL,"cannot open %s\n",fname); sprintf(fname,"ldpc_BG%d_Zc%d_16bit.c",BG,Zc); FILE *fd2=fopen(fname,"w"); AssertFatal(fd2!=NULL,"cannot open %s\n",fname); int shift; char data_type[100]; char xor_command[100]; int mask; fprintf(fd,"#include \"PHY/sse_intrin.h\"\n"); fprintf(fd2,"#include \"PHY/sse_intrin.h\"\n"); if ((Zc&31)==0) { shift=5; // AVX2 - 256-bit SIMD mask=31; strcpy(data_type,"__m256i"); strcpy(xor_command,"_mm256_xor_si256"); } else if ((Zc&15)==0) { shift=4; // SSE4 - 128-bit SIMD mask=15; strcpy(data_type,"__m128i"); strcpy(xor_command,"_mm_xor_si128"); } else if ((Zc&7)==0) { shift=3; // MMX - 64-bit SIMD mask=7; strcpy(data_type,"__m64"); strcpy(xor_command,"_mm_xor_si64"); } else { shift=0; // no SIMD mask=0; strcpy(data_type,"uint8_t"); strcpy(xor_command,"scalar_xor"); fprintf(fd,"#define scalar_xor(a,b) ((a)^(b))\n"); fprintf(fd2,"#define scalar_xor(a,b) ((a)^(b))\n"); } fprintf(fd,"// generated code for Zc=%d, byte encoding\n",Zc); fprintf(fd2,"// generated code for Zc=%d, 16bit encoding\n",Zc); fprintf(fd,"static inline void ldpc_BG%d_Zc%d_byte(uint8_t *c,uint8_t *d) {\n",BG,Zc); fprintf(fd2,"static inline void ldpc_BG%d_Zc%d_16bit(uint16_t *c,uint16_t *d) {\n",BG,Zc); fprintf(fd," %s *csimd=(%s *)c,*dsimd=(%s *)d;\n\n",data_type,data_type,data_type); fprintf(fd2," %s *csimd=(%s *)c,*dsimd=(%s *)d;\n\n",data_type,data_type,data_type); fprintf(fd," %s *c2,*d2;\n\n",data_type); fprintf(fd2," %s *c2,*d2;\n\n",data_type); fprintf(fd," int i2;\n"); fprintf(fd2," int i2;\n"); fprintf(fd," for (i2=0; i2<%d; i2++) {\n",Zc>>shift); if (shift > 0) fprintf(fd2," for (i2=0; i2<%d; i2++) {\n",Zc>>(shift-1)); for (i2=0; i2 < 1; i2++) { //t=Kb*Zc+i2; // calculate each row in base graph fprintf(fd," c2=&csimd[i2];\n"); fprintf(fd," d2=&dsimd[i2];\n"); fprintf(fd2," c2=&csimd[i2];\n"); fprintf(fd2," d2=&dsimd[i2];\n"); for (i1=0; i1 < nrows; i1++) { channel_temp=0; fprintf(fd,"\n//row: %d\n",i1); fprintf(fd2,"\n//row: %d\n",i1); fprintf(fd," d2[%d]=",(Zc*i1)>>shift); fprintf(fd2," d2[%d]=",(Zc*i1)>>(shift-1)); nind=0; for (i3=0; i3 < ncols; i3++) { temp_prime=i1 * ncols + i3; for (i4=0; i4 < no_shift_values[temp_prime]; i4++) { var=(int)((i3*Zc + (Gen_shift_values[ pointer_shift_values[temp_prime]+i4 ]+1)%Zc)/Zc); int index =var*2*Zc + (i3*Zc + (Gen_shift_values[ pointer_shift_values[temp_prime]+i4 ]+1)%Zc) % Zc; indlist[nind] = ((index&mask)*((2*Zc)>>shift)*Kb)+(index>>shift); indlist2[nind++] = ((index&(mask>>1))*((2*Zc)>>(shift-1))*Kb)+(index>>(shift-1)); } } for (i4=0;i4gen_code); }