Raymond Knopp
a7bc282302
Testing on Neoverse N1 (Ampere 3GHz). Tested only on a subset of phy-simulators. - Changes: - use SIMDE consistently - adaptations of LDPC decoder generator for ARMv8 performance - SIMDe modifications of Intel CRC to allow for aarch64 build. optimizations for 128-bit to improve performance of LDPC encode/decode on aarch64 (Neoverse 1) - added BG2 files for 128-bit ldpc encoder (aarch64) - testing on Xeon - testing on x86 - minor changes to build/run on x86 - change in crc.h after returning to aarch64 - removed some warning in ldpc decoder generator for x86_64 - char - Delete irrelevant constants - Correctly declare variables - Define stdbool for all architectures - Remove definition of _MM_SHUFFLE and use SIMDE_MM_SHUFFLE - Remove commented code - Fix CMakeLists.txt - Include SIMDE avx2 functions in tools_defs.h
117 lines
4.4 KiB
C
117 lines
4.4 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#include "PHY/defs_eNB.h"
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#include <math.h>
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#include "PHY/sse_intrin.h"
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#include "modulation_extern.h"
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void remove_7_5_kHz(RU_t *ru,uint8_t slot)
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{
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int32_t **rxdata=ru->common.rxdata;
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int32_t **rxdata_7_5kHz=ru->common.rxdata_7_5kHz;
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uint16_t len;
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uint32_t *kHz7_5ptr;
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simde__m128i *rxptr128, *rxptr128_7_5kHz, *kHz7_5ptr128, kHz7_5_2, mmtmp_re, mmtmp_im, mmtmp_re2, mmtmp_im2;
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uint32_t slot_offset,slot_offset2;
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uint8_t aa;
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uint32_t i;
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LTE_DL_FRAME_PARMS *frame_parms=ru->frame_parms;
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switch (frame_parms->N_RB_UL) {
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case 6:
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kHz7_5ptr = (frame_parms->Ncp==0) ? (uint32_t*)s6n_kHz_7_5 : (uint32_t*)s6e_kHz_7_5;
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break;
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case 15:
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kHz7_5ptr = (frame_parms->Ncp==0) ? (uint32_t*)s15n_kHz_7_5 : (uint32_t*)s15e_kHz_7_5;
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break;
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case 25:
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kHz7_5ptr = (frame_parms->Ncp==0) ? (uint32_t*)s25n_kHz_7_5 : (uint32_t*)s25e_kHz_7_5;
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break;
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case 50:
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kHz7_5ptr = (frame_parms->Ncp==0) ? (uint32_t*)s50n_kHz_7_5 : (uint32_t*)s50e_kHz_7_5;
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break;
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case 75:
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kHz7_5ptr = (frame_parms->Ncp==0) ? (uint32_t*)s75n_kHz_7_5 : (uint32_t*)s75e_kHz_7_5;
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break;
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case 100:
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kHz7_5ptr = (frame_parms->Ncp==0) ? (uint32_t*)s100n_kHz_7_5 : (uint32_t*)s100e_kHz_7_5;
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break;
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default:
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kHz7_5ptr = (frame_parms->Ncp==0) ? (uint32_t*)s25n_kHz_7_5 : (uint32_t*)s25e_kHz_7_5;
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break;
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}
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slot_offset = ((uint32_t)slot * frame_parms->samples_per_tti/2)-ru->N_TA_offset;
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slot_offset2 = (uint32_t)(slot&1) * frame_parms->samples_per_tti/2;
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len = frame_parms->samples_per_tti/2;
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for (aa=0; aa<ru->nb_rx; aa++) {
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rxptr128 = (simde__m128i *)&rxdata[aa][slot_offset];
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rxptr128_7_5kHz = (simde__m128i *)&rxdata_7_5kHz[aa][slot_offset2];
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kHz7_5ptr128 = (simde__m128i *)kHz7_5ptr;
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// apply 7.5 kHz
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// if (((slot>>1)&1) == 0) { // apply the sinusoid from the table directly
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for (i=0; i<(len>>2); i++) {
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kHz7_5_2 = simde_mm_sign_epi16(*kHz7_5ptr128, *(simde__m128i *)&conjugate75_2[0]);
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mmtmp_re = simde_mm_madd_epi16(*rxptr128, kHz7_5_2);
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// Real part of complex multiplication (note: 7_5kHz signal is conjugated for this to work)
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mmtmp_im = simde_mm_shufflelo_epi16(kHz7_5_2, SIMDE_MM_SHUFFLE(2, 3, 0, 1));
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mmtmp_im = simde_mm_shufflehi_epi16(mmtmp_im, SIMDE_MM_SHUFFLE(2, 3, 0, 1));
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mmtmp_im = simde_mm_sign_epi16(mmtmp_im, *(simde__m128i *)&conjugate75[0]);
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mmtmp_im = simde_mm_madd_epi16(mmtmp_im, rxptr128[0]);
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mmtmp_re = simde_mm_srai_epi32(mmtmp_re, 15);
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mmtmp_im = simde_mm_srai_epi32(mmtmp_im, 15);
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mmtmp_re2 = simde_mm_unpacklo_epi32(mmtmp_re, mmtmp_im);
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mmtmp_im2 = simde_mm_unpackhi_epi32(mmtmp_re, mmtmp_im);
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rxptr128_7_5kHz[0] = simde_mm_packs_epi32(mmtmp_re2, mmtmp_im2);
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rxptr128++;
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rxptr128_7_5kHz++;
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kHz7_5ptr128++;
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}
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// undo 7.5 kHz offset for symbol 3 in case RU is slave (for OTA synchronization)
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if (ru->is_slave == 1 && slot == 2){
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memcpy((void*)&rxdata_7_5kHz[aa][(3*frame_parms->ofdm_symbol_size)+
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(2*frame_parms->nb_prefix_samples)+
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frame_parms->nb_prefix_samples0],
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(void*)&rxdata[aa][slot_offset+ru->N_TA_offset+
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(3*frame_parms->ofdm_symbol_size)+
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(2*frame_parms->nb_prefix_samples)+
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frame_parms->nb_prefix_samples0],
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(frame_parms->ofdm_symbol_size + frame_parms->nb_prefix_samples)*sizeof(int32_t));
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}
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}
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}
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