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Reintroduce unscrambling C implemantation, use SIMDE for Intel and ARM

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This commit is contained in:
Laurent THOMAS
2023-09-13 17:20:08 +02:00
committed by Robert Schmidt
parent a62641f9f3
commit fa73c14df6
1 changed files with 13 additions and 0 deletions
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openair1/PHY/NR_TRANSPORT/nr_scrambling.c
+13
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@@ -51,6 +51,7 @@ void nr_codeword_unscrambling(int16_t* llr, uint32_t size, uint8_t q, uint32_t N
uint32_t x2 = (n_RNTI << 15) + (q << 14) + Nid;
uint32_t s = 0;
#if defined(__x86_64__) || defined(__i386__) || defined(__arm__) || defined(__aarch64__)
uint8_t *s8=(uint8_t *)&s;
simde__m128i *llr128 = (simde__m128i*)llr;
s = lte_gold_generic(&x1, &x2, 1);
@@ -62,4 +63,16 @@ void nr_codeword_unscrambling(int16_t* llr, uint32_t size, uint8_t q, uint32_t N
llr128[j+3] = simde_mm_mullo_epi16(llr128[j+3],byte2m128i[s8[3]]);
s = lte_gold_generic(&x1, &x2, 0);
}
#else
uint8_t reset = 1;
for (uint32_t i=0; i<size; i++) {
if ((i&0x1f)==0) {
s = lte_gold_generic(&x1, &x2, reset);
reset = 0;
}
if (((s>>(i&0x1f))&1)==1)
llr[i] = -llr[i];
}
#endif
}