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/*
* 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
*/
#include "nr_transport_common_proto.h"
#include "PHY/NR_REFSIG/nr_refsig.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
#define DEBUG_SCRAMBLING(a)
//#define DEBUG_SCRAMBLING(a) a
void nr_codeword_scrambling(uint8_t *in,
uint32_t size,
uint8_t q,
uint32_t Nid,
uint32_t n_RNTI,
uint32_t* out)
{
uint32_t x1;
uint32_t x2 = (n_RNTI<<15) + (q<<14) + Nid;
uint32_t s = 0;
s=lte_gold_generic(&x1, &x2, 1);
for (int i=0; i<((size>>5)+((size&0x1f) > 0 ? 1 : 0)); i++) {
__m256i c = ((__m256i*)in)[i];
uint32_t in32 = simde_mm256_movemask_epi8(simde_mm256_slli_epi16(c,7));
out[i]=(in32^s);
DEBUG_SCRAMBLING(LOG_D(PHY, "in[%d] %x => %x\n", i, in32, out[i]));
s=lte_gold_generic(&x1, &x2, 0);
}
}
void nr_codeword_unscrambling(int16_t* llr, uint32_t size, uint8_t q, uint32_t Nid, uint32_t n_RNTI)
{
uint32_t x1;
uint32_t x2 = (n_RNTI << 15) + (q << 14) + Nid;
uint32_t s = 0;
#if defined(__x86_64__) || defined(__i386__)
uint8_t *s8=(uint8_t *)&s;
__m128i *llr128 = (__m128i*)llr;
s = lte_gold_generic(&x1, &x2, 1);
for (int i = 0, j = 0; i < ((size >> 5) + ((size & 0x1f) > 0 ? 1 : 0)); i++, j += 4) {
llr128[j] = _mm_mullo_epi16(llr128[j],byte2m128i[s8[0]]);
llr128[j+1] = _mm_mullo_epi16(llr128[j+1],byte2m128i[s8[1]]);
llr128[j+2] = _mm_mullo_epi16(llr128[j+2],byte2m128i[s8[2]]);
llr128[j+3] = _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
}