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SIMD optimization for RE mapping

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This commit is contained in:
Raymond Knopp
2021-10-27 21:58:26 +02:00
parent fc9baef93b
commit cff72a8b73
1 changed files with 9 additions and 9 deletions
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openair1/PHY/NR_TRANSPORT/nr_dlsch.c
+9 -9
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@@ -415,17 +415,18 @@ uint8_t nr_generate_pdsch(processingData_L1tx_t *msgTx,
}
else { // no PTRS or DMRS in this symbol
// Loop Over SCs:
int16_t *txF=&txdataF_precoding[ap][((l*frame_parms->ofdm_symbol_size+start_sc+txdataF_offset)<<1)];
__m64 *txF=(__m64*)&txdataF_precoding[ap][((l*frame_parms->ofdm_symbol_size+start_sc+txdataF_offset)<<1)];
int upper_limit=rel15->rbSize*NR_NB_SC_PER_RB;
int remaining_re = 0;
if (start_sc + upper_limit > frame_parms->ofdm_symbol_size) {
remaining_re = upper_limit + start_sc - frame_parms->ofdm_symbol_size;
upper_limit = frame_parms->ofdm_symbol_size - start_sc;
}
int16_t *txl = &tx_layers[ap][m<<1];
for (int i=0; i<(upper_limit<<1); i++) {
__m64 *txl = (__m64*)&tx_layers[ap][m<<1];
__m64 amp64=_mm_set1_pi16(amp);
for (int i=0; i<(upper_limit>>1); i++) {
txF[i] = (amp * txl[i]) >> 15;
txF[i] = _mm_mulhrs_pi16(amp64,txl[i]);
#ifdef DEBUG_DLSCH_MAPPING
if ((i&1) > 0)
printf("m %d\t l %d \t k %d \t txdataF: %d %d\n",
@@ -440,11 +441,10 @@ uint8_t nr_generate_pdsch(processingData_L1tx_t *msgTx,
} //RE loop, first part
m+=upper_limit;
if (remaining_re > 0) {
txF = &txdataF_precoding[ap][((l*frame_parms->ofdm_symbol_size+txdataF_offset)<<1)];
txl = &tx_layers[ap][m<<1];
for (int i=0; i<(remaining_re<<1); i++) {
txF[i] = (amp * txl[i]) >> 15;
txF = (__m64*)&txdataF_precoding[ap][((l*frame_parms->ofdm_symbol_size+txdataF_offset)<<1)];
txl = (__m64*)&tx_layers[ap][m<<1];
for (int i=0; i<(remaining_re>>1); i++) {
txF[i] = _mm_mulhrs_pi16(amp64,txl[i]);
#ifdef DEBUG_DLSCH_MAPPING
if ((i&1) > 0)
printf("m %d\t l %d \t k %d \t txdataF: %d %d\n",