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Updated/Optimized nrLDPC_llrRes2llrOut

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This commit is contained in:
sebastian
2019-09-24 11:03:46 +02:00
parent 215315c79a
commit 508b63c444
2 changed files with 46 additions and 5 deletions
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openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_decoder.c
+1 -1
View File
@@ -456,7 +456,7 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr, int8_t* p_out, t_nrLDP
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->llrRes2llrOut);
#endif
nrLDPC_llrRes2llrOut(p_lut, p_llrOut, p_procBuf, numLLR);
nrLDPC_llrRes2llrOut(p_lut, p_llrOut, p_procBuf, numLLR, Z, BG);
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->llrRes2llrOut);
#endif
openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_mPass.h
+45 -4
View File
@@ -165,6 +165,26 @@ static inline void nrLDPC_llr2CnProcBuf(t_nrLDPC_lut* p_lut, int8_t* llr, t_nrLD
cnProcBuf[*p_lutEntry++] = llr[i];
}
// Test
// =====================================================================
// CN group with 3 BNs
//const uint8_t* lut_numCnInCnGroups = p_lut->numCnInCnGroups;
/*
const uint32_t* lut_startAddrCnGroups = p_lut->startAddrCnGroups;
const uint16_t (*lut_circShift_CNG3) [lut_numCnInCnGroups_BG1_R13[0]] = (uint16_t(*)[lut_numCnInCnGroups_BG1_R13[0]]) p_lut->circShift[0];
int8_t* p_cnProcBuf;
uint32_t bitOffsetInGroup;
bitOffsetInGroup = lut_numCnInCnGroups_BG1_R13[0]*NR_LDPC_ZMAX;
const uint8_t lut_CNG3[3] = {0, 1, 26};
for (j=0; j<2; j++)
{
p_cnProcBuf = &cnProcBuf[lut_startAddrCnGroups[0] + j*bitOffsetInGroup];
nrLDPC_inv_circ_memcpy(p_cnProcBuf, &llr[lut_CNG3[j]*Z], Z, lut_circShift_CNG3[j][0]);
}
*/
}
/**
@@ -870,16 +890,37 @@ static inline void nrLDPC_bn2cnProcBuf_BG1(t_nrLDPC_lut* p_lut, t_nrLDPC_procBuf
\param llrOut Pointer to output LLRs
\param numLLR Number of LLR values
*/
static inline void nrLDPC_llrRes2llrOut(t_nrLDPC_lut* p_lut, int8_t* llrOut, t_nrLDPC_procBuf* p_procBuf, uint16_t numLLR)
static inline void nrLDPC_llrRes2llrOut(t_nrLDPC_lut* p_lut, int8_t* llrOut, t_nrLDPC_procBuf* p_procBuf, uint16_t numLLR,uint16_t Z, uint8_t BG)
{
const uint16_t* lut_llr2llrProcBuf = p_lut->llr2llrProcBuf;
uint32_t i;
const uint8_t numBn2CnG1 = p_lut->numBnInBnGroups[0];
uint32_t colG1 = NR_LDPC_START_COL_PARITY_BG1*Z;
const uint16_t* lut_llr2llrProcBufAddr = p_lut->llr2llrProcBufAddr;
const uint8_t* lut_llr2llrProcBufNumBn = p_lut->llr2llrProcBufNumBn;
const uint8_t* lut_llr2llrProcBufNumEl = p_lut->llr2llrProcBufNumEl;
uint16_t numLlr = 0;
int8_t* llrRes = p_procBuf->llrRes;
int8_t* p_llrOut = &llrOut[0];
for (i=0; i<numLLR; i++)
if (BG == 2)
{
llrOut[i] = llrRes[lut_llr2llrProcBuf[i]];
colG1 = NR_LDPC_START_COL_PARITY_BG2*Z;
}
// Copy LLRs connected to 1 CN
if (numBn2CnG1 > 0)
{
memcpy(&llrOut[colG1], llrRes, numBn2CnG1*Z);
}
// First 2 columns might be set to zero directly if it's true they always belong to the groups with highest number of connected CNs...
for (i=0; i<(*lut_llr2llrProcBufNumEl); i++)
{
numLlr = lut_llr2llrProcBufNumBn[i]*Z;
memcpy(p_llrOut, &llrRes[lut_llr2llrProcBufAddr[i]], numLlr);
p_llrOut+=numLlr;
}
}