dlsch_llr_computation.c 425 KB
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    OpenAirInterface
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    OpenAirInterface is distributed in the hope that it will be useful,
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  OpenAirInterface Admin: openair_admin@eurecom.fr
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/*! \file PHY/LTE_TRANSPORT/dlsch_llr_computation.c
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 * \brief Top-level routines for LLR computation of the PDSCH physical channel from 36-211, V8.6 2009-03
 * \author R. Knopp, F. Kaltenberger,A. Bhamri, S. Aubert, S. Wagner
 * \date 2011
 * \version 0.1
 * \company Eurecom
 * \email: knopp@eurecom.fr,florian.kaltenberger@eurecom.fr,ankit.bhamri@eurecom.fr,sebastien.aubert@eurecom.fr, sebastian.wagner@eurecom.fr
 * \note
 * \warning
 */
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#include "PHY/defs.h"
#include "PHY/extern.h"
#include "defs.h"
#include "extern.h"
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#include "PHY/sse_intrin.h"
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int16_t zero[8] __attribute__ ((aligned(16))) = {0,0,0,0,0,0,0,0};
int16_t ones[8] __attribute__ ((aligned(16))) = {0xffff,0xffff,0xffff,0xffff,0xffff,0xffff,0xffff,0xffff};
#if defined(__x86_64__) || defined(__i386__)
__m128i rho_rpi __attribute__ ((aligned(16)));
__m128i rho_rmi __attribute__ ((aligned(16)));
__m128i rho_rpi_1_1 __attribute__ ((aligned(16)));
__m128i rho_rpi_1_3 __attribute__ ((aligned(16)));
__m128i rho_rpi_1_5 __attribute__ ((aligned(16)));
__m128i rho_rpi_1_7 __attribute__ ((aligned(16)));
__m128i rho_rpi_3_1 __attribute__ ((aligned(16)));
__m128i rho_rpi_3_3 __attribute__ ((aligned(16)));
__m128i rho_rpi_3_5 __attribute__ ((aligned(16)));
__m128i rho_rpi_3_7 __attribute__ ((aligned(16)));
__m128i rho_rpi_5_1 __attribute__ ((aligned(16)));
__m128i rho_rpi_5_3 __attribute__ ((aligned(16)));
__m128i rho_rpi_5_5 __attribute__ ((aligned(16)));
__m128i rho_rpi_5_7 __attribute__ ((aligned(16)));
__m128i rho_rpi_7_1 __attribute__ ((aligned(16)));
__m128i rho_rpi_7_3 __attribute__ ((aligned(16)));
__m128i rho_rpi_7_5 __attribute__ ((aligned(16)));
__m128i rho_rpi_7_7 __attribute__ ((aligned(16)));
__m128i rho_rmi_1_1 __attribute__ ((aligned(16)));
__m128i rho_rmi_1_3 __attribute__ ((aligned(16)));
__m128i rho_rmi_1_5 __attribute__ ((aligned(16)));
__m128i rho_rmi_1_7 __attribute__ ((aligned(16)));
__m128i rho_rmi_3_1 __attribute__ ((aligned(16)));
__m128i rho_rmi_3_3 __attribute__ ((aligned(16)));
__m128i rho_rmi_3_5 __attribute__ ((aligned(16)));
__m128i rho_rmi_3_7 __attribute__ ((aligned(16)));
__m128i rho_rmi_5_1 __attribute__ ((aligned(16)));
__m128i rho_rmi_5_3 __attribute__ ((aligned(16)));
__m128i rho_rmi_5_5 __attribute__ ((aligned(16)));
__m128i rho_rmi_5_7 __attribute__ ((aligned(16)));
__m128i rho_rmi_7_1 __attribute__ ((aligned(16)));
__m128i rho_rmi_7_3 __attribute__ ((aligned(16)));
__m128i rho_rmi_7_5 __attribute__ ((aligned(16)));
__m128i rho_rmi_7_7 __attribute__ ((aligned(16)));

__m128i psi_r_m7_m7 __attribute__ ((aligned(16)));
__m128i psi_r_m7_m5 __attribute__ ((aligned(16)));
__m128i psi_r_m7_m3 __attribute__ ((aligned(16)));
__m128i psi_r_m7_m1 __attribute__ ((aligned(16)));
__m128i psi_r_m7_p1 __attribute__ ((aligned(16)));
__m128i psi_r_m7_p3 __attribute__ ((aligned(16)));
__m128i psi_r_m7_p5 __attribute__ ((aligned(16)));
__m128i psi_r_m7_p7 __attribute__ ((aligned(16)));
__m128i psi_r_m5_m7 __attribute__ ((aligned(16)));
__m128i psi_r_m5_m5 __attribute__ ((aligned(16)));
__m128i psi_r_m5_m3 __attribute__ ((aligned(16)));
__m128i psi_r_m5_m1 __attribute__ ((aligned(16)));
__m128i psi_r_m5_p1 __attribute__ ((aligned(16)));
__m128i psi_r_m5_p3 __attribute__ ((aligned(16)));
__m128i psi_r_m5_p5 __attribute__ ((aligned(16)));
__m128i psi_r_m5_p7 __attribute__ ((aligned(16)));
__m128i psi_r_m3_m7 __attribute__ ((aligned(16)));
__m128i psi_r_m3_m5 __attribute__ ((aligned(16)));
__m128i psi_r_m3_m3 __attribute__ ((aligned(16)));
__m128i psi_r_m3_m1 __attribute__ ((aligned(16)));
__m128i psi_r_m3_p1 __attribute__ ((aligned(16)));
__m128i psi_r_m3_p3 __attribute__ ((aligned(16)));
__m128i psi_r_m3_p5 __attribute__ ((aligned(16)));
__m128i psi_r_m3_p7 __attribute__ ((aligned(16)));
__m128i psi_r_m1_m7 __attribute__ ((aligned(16)));
__m128i psi_r_m1_m5 __attribute__ ((aligned(16)));
__m128i psi_r_m1_m3 __attribute__ ((aligned(16)));
__m128i psi_r_m1_m1 __attribute__ ((aligned(16)));
__m128i psi_r_m1_p1 __attribute__ ((aligned(16)));
__m128i psi_r_m1_p3 __attribute__ ((aligned(16)));
__m128i psi_r_m1_p5 __attribute__ ((aligned(16)));
__m128i psi_r_m1_p7 __attribute__ ((aligned(16)));
__m128i psi_r_p1_m7 __attribute__ ((aligned(16)));
__m128i psi_r_p1_m5 __attribute__ ((aligned(16)));
__m128i psi_r_p1_m3 __attribute__ ((aligned(16)));
__m128i psi_r_p1_m1 __attribute__ ((aligned(16)));
__m128i psi_r_p1_p1 __attribute__ ((aligned(16)));
__m128i psi_r_p1_p3 __attribute__ ((aligned(16)));
__m128i psi_r_p1_p5 __attribute__ ((aligned(16)));
__m128i psi_r_p1_p7 __attribute__ ((aligned(16)));
__m128i psi_r_p3_m7 __attribute__ ((aligned(16)));
__m128i psi_r_p3_m5 __attribute__ ((aligned(16)));
__m128i psi_r_p3_m3 __attribute__ ((aligned(16)));
__m128i psi_r_p3_m1 __attribute__ ((aligned(16)));
__m128i psi_r_p3_p1 __attribute__ ((aligned(16)));
__m128i psi_r_p3_p3 __attribute__ ((aligned(16)));
__m128i psi_r_p3_p5 __attribute__ ((aligned(16)));
__m128i psi_r_p3_p7 __attribute__ ((aligned(16)));
__m128i psi_r_p5_m7 __attribute__ ((aligned(16)));
__m128i psi_r_p5_m5 __attribute__ ((aligned(16)));
__m128i psi_r_p5_m3 __attribute__ ((aligned(16)));
__m128i psi_r_p5_m1 __attribute__ ((aligned(16)));
__m128i psi_r_p5_p1 __attribute__ ((aligned(16)));
__m128i psi_r_p5_p3 __attribute__ ((aligned(16)));
__m128i psi_r_p5_p5 __attribute__ ((aligned(16)));
__m128i psi_r_p5_p7 __attribute__ ((aligned(16)));
__m128i psi_r_p7_m7 __attribute__ ((aligned(16)));
__m128i psi_r_p7_m5 __attribute__ ((aligned(16)));
__m128i psi_r_p7_m3 __attribute__ ((aligned(16)));
__m128i psi_r_p7_m1 __attribute__ ((aligned(16)));
__m128i psi_r_p7_p1 __attribute__ ((aligned(16)));
__m128i psi_r_p7_p3 __attribute__ ((aligned(16)));
__m128i psi_r_p7_p5 __attribute__ ((aligned(16)));
__m128i psi_r_p7_p7 __attribute__ ((aligned(16)));

__m128i psi_i_m7_m7 __attribute__ ((aligned(16)));
__m128i psi_i_m7_m5 __attribute__ ((aligned(16)));
__m128i psi_i_m7_m3 __attribute__ ((aligned(16)));
__m128i psi_i_m7_m1 __attribute__ ((aligned(16)));
__m128i psi_i_m7_p1 __attribute__ ((aligned(16)));
__m128i psi_i_m7_p3 __attribute__ ((aligned(16)));
__m128i psi_i_m7_p5 __attribute__ ((aligned(16)));
__m128i psi_i_m7_p7 __attribute__ ((aligned(16)));
__m128i psi_i_m5_m7 __attribute__ ((aligned(16)));
__m128i psi_i_m5_m5 __attribute__ ((aligned(16)));
__m128i psi_i_m5_m3 __attribute__ ((aligned(16)));
__m128i psi_i_m5_m1 __attribute__ ((aligned(16)));
__m128i psi_i_m5_p1 __attribute__ ((aligned(16)));
__m128i psi_i_m5_p3 __attribute__ ((aligned(16)));
__m128i psi_i_m5_p5 __attribute__ ((aligned(16)));
__m128i psi_i_m5_p7 __attribute__ ((aligned(16)));
__m128i psi_i_m3_m7 __attribute__ ((aligned(16)));
__m128i psi_i_m3_m5 __attribute__ ((aligned(16)));
__m128i psi_i_m3_m3 __attribute__ ((aligned(16)));
__m128i psi_i_m3_m1 __attribute__ ((aligned(16)));
__m128i psi_i_m3_p1 __attribute__ ((aligned(16)));
__m128i psi_i_m3_p3 __attribute__ ((aligned(16)));
__m128i psi_i_m3_p5 __attribute__ ((aligned(16)));
__m128i psi_i_m3_p7 __attribute__ ((aligned(16)));
__m128i psi_i_m1_m7 __attribute__ ((aligned(16)));
__m128i psi_i_m1_m5 __attribute__ ((aligned(16)));
__m128i psi_i_m1_m3 __attribute__ ((aligned(16)));
__m128i psi_i_m1_m1 __attribute__ ((aligned(16)));
__m128i psi_i_m1_p1 __attribute__ ((aligned(16)));
__m128i psi_i_m1_p3 __attribute__ ((aligned(16)));
__m128i psi_i_m1_p5 __attribute__ ((aligned(16)));
__m128i psi_i_m1_p7 __attribute__ ((aligned(16)));
__m128i psi_i_p1_m7 __attribute__ ((aligned(16)));
__m128i psi_i_p1_m5 __attribute__ ((aligned(16)));
__m128i psi_i_p1_m3 __attribute__ ((aligned(16)));
__m128i psi_i_p1_m1 __attribute__ ((aligned(16)));
__m128i psi_i_p1_p1 __attribute__ ((aligned(16)));
__m128i psi_i_p1_p3 __attribute__ ((aligned(16)));
__m128i psi_i_p1_p5 __attribute__ ((aligned(16)));
__m128i psi_i_p1_p7 __attribute__ ((aligned(16)));
__m128i psi_i_p3_m7 __attribute__ ((aligned(16)));
__m128i psi_i_p3_m5 __attribute__ ((aligned(16)));
__m128i psi_i_p3_m3 __attribute__ ((aligned(16)));
__m128i psi_i_p3_m1 __attribute__ ((aligned(16)));
__m128i psi_i_p3_p1 __attribute__ ((aligned(16)));
__m128i psi_i_p3_p3 __attribute__ ((aligned(16)));
__m128i psi_i_p3_p5 __attribute__ ((aligned(16)));
__m128i psi_i_p3_p7 __attribute__ ((aligned(16)));
__m128i psi_i_p5_m7 __attribute__ ((aligned(16)));
__m128i psi_i_p5_m5 __attribute__ ((aligned(16)));
__m128i psi_i_p5_m3 __attribute__ ((aligned(16)));
__m128i psi_i_p5_m1 __attribute__ ((aligned(16)));
__m128i psi_i_p5_p1 __attribute__ ((aligned(16)));
__m128i psi_i_p5_p3 __attribute__ ((aligned(16)));
__m128i psi_i_p5_p5 __attribute__ ((aligned(16)));
__m128i psi_i_p5_p7 __attribute__ ((aligned(16)));
__m128i psi_i_p7_m7 __attribute__ ((aligned(16)));
__m128i psi_i_p7_m5 __attribute__ ((aligned(16)));
__m128i psi_i_p7_m3 __attribute__ ((aligned(16)));
__m128i psi_i_p7_m1 __attribute__ ((aligned(16)));
__m128i psi_i_p7_p1 __attribute__ ((aligned(16)));
__m128i psi_i_p7_p3 __attribute__ ((aligned(16)));
__m128i psi_i_p7_p5 __attribute__ ((aligned(16)));
__m128i psi_i_p7_p7 __attribute__ ((aligned(16)));

__m128i a_r_m7_m7 __attribute__ ((aligned(16)));
__m128i a_r_m7_m5 __attribute__ ((aligned(16)));
__m128i a_r_m7_m3 __attribute__ ((aligned(16)));
__m128i a_r_m7_m1 __attribute__ ((aligned(16)));
__m128i a_r_m7_p1 __attribute__ ((aligned(16)));
__m128i a_r_m7_p3 __attribute__ ((aligned(16)));
__m128i a_r_m7_p5 __attribute__ ((aligned(16)));
__m128i a_r_m7_p7 __attribute__ ((aligned(16)));
__m128i a_r_m5_m7 __attribute__ ((aligned(16)));
__m128i a_r_m5_m5 __attribute__ ((aligned(16)));
__m128i a_r_m5_m3 __attribute__ ((aligned(16)));
__m128i a_r_m5_m1 __attribute__ ((aligned(16)));
__m128i a_r_m5_p1 __attribute__ ((aligned(16)));
__m128i a_r_m5_p3 __attribute__ ((aligned(16)));
__m128i a_r_m5_p5 __attribute__ ((aligned(16)));
__m128i a_r_m5_p7 __attribute__ ((aligned(16)));
__m128i a_r_m3_m7 __attribute__ ((aligned(16)));
__m128i a_r_m3_m5 __attribute__ ((aligned(16)));
__m128i a_r_m3_m3 __attribute__ ((aligned(16)));
__m128i a_r_m3_m1 __attribute__ ((aligned(16)));
__m128i a_r_m3_p1 __attribute__ ((aligned(16)));
__m128i a_r_m3_p3 __attribute__ ((aligned(16)));
__m128i a_r_m3_p5 __attribute__ ((aligned(16)));
__m128i a_r_m3_p7 __attribute__ ((aligned(16)));
__m128i a_r_m1_m7 __attribute__ ((aligned(16)));
__m128i a_r_m1_m5 __attribute__ ((aligned(16)));
__m128i a_r_m1_m3 __attribute__ ((aligned(16)));
__m128i a_r_m1_m1 __attribute__ ((aligned(16)));
__m128i a_r_m1_p1 __attribute__ ((aligned(16)));
__m128i a_r_m1_p3 __attribute__ ((aligned(16)));
__m128i a_r_m1_p5 __attribute__ ((aligned(16)));
__m128i a_r_m1_p7 __attribute__ ((aligned(16)));
__m128i a_r_p1_m7 __attribute__ ((aligned(16)));
__m128i a_r_p1_m5 __attribute__ ((aligned(16)));
__m128i a_r_p1_m3 __attribute__ ((aligned(16)));
__m128i a_r_p1_m1 __attribute__ ((aligned(16)));
__m128i a_r_p1_p1 __attribute__ ((aligned(16)));
__m128i a_r_p1_p3 __attribute__ ((aligned(16)));
__m128i a_r_p1_p5 __attribute__ ((aligned(16)));
__m128i a_r_p1_p7 __attribute__ ((aligned(16)));
__m128i a_r_p3_m7 __attribute__ ((aligned(16)));
__m128i a_r_p3_m5 __attribute__ ((aligned(16)));
__m128i a_r_p3_m3 __attribute__ ((aligned(16)));
__m128i a_r_p3_m1 __attribute__ ((aligned(16)));
__m128i a_r_p3_p1 __attribute__ ((aligned(16)));
__m128i a_r_p3_p3 __attribute__ ((aligned(16)));
__m128i a_r_p3_p5 __attribute__ ((aligned(16)));
__m128i a_r_p3_p7 __attribute__ ((aligned(16)));
__m128i a_r_p5_m7 __attribute__ ((aligned(16)));
__m128i a_r_p5_m5 __attribute__ ((aligned(16)));
__m128i a_r_p5_m3 __attribute__ ((aligned(16)));
__m128i a_r_p5_m1 __attribute__ ((aligned(16)));
__m128i a_r_p5_p1 __attribute__ ((aligned(16)));
__m128i a_r_p5_p3 __attribute__ ((aligned(16)));
__m128i a_r_p5_p5 __attribute__ ((aligned(16)));
__m128i a_r_p5_p7 __attribute__ ((aligned(16)));
__m128i a_r_p7_m7 __attribute__ ((aligned(16)));
__m128i a_r_p7_m5 __attribute__ ((aligned(16)));
__m128i a_r_p7_m3 __attribute__ ((aligned(16)));
__m128i a_r_p7_m1 __attribute__ ((aligned(16)));
__m128i a_r_p7_p1 __attribute__ ((aligned(16)));
__m128i a_r_p7_p3 __attribute__ ((aligned(16)));
__m128i a_r_p7_p5 __attribute__ ((aligned(16)));
__m128i a_r_p7_p7 __attribute__ ((aligned(16)));

__m128i a_i_m7_m7 __attribute__ ((aligned(16)));
__m128i a_i_m7_m5 __attribute__ ((aligned(16)));
__m128i a_i_m7_m3 __attribute__ ((aligned(16)));
__m128i a_i_m7_m1 __attribute__ ((aligned(16)));
__m128i a_i_m7_p1 __attribute__ ((aligned(16)));
__m128i a_i_m7_p3 __attribute__ ((aligned(16)));
__m128i a_i_m7_p5 __attribute__ ((aligned(16)));
__m128i a_i_m7_p7 __attribute__ ((aligned(16)));
__m128i a_i_m5_m7 __attribute__ ((aligned(16)));
__m128i a_i_m5_m5 __attribute__ ((aligned(16)));
__m128i a_i_m5_m3 __attribute__ ((aligned(16)));
__m128i a_i_m5_m1 __attribute__ ((aligned(16)));
__m128i a_i_m5_p1 __attribute__ ((aligned(16)));
__m128i a_i_m5_p3 __attribute__ ((aligned(16)));
__m128i a_i_m5_p5 __attribute__ ((aligned(16)));
__m128i a_i_m5_p7 __attribute__ ((aligned(16)));
__m128i a_i_m3_m7 __attribute__ ((aligned(16)));
__m128i a_i_m3_m5 __attribute__ ((aligned(16)));
__m128i a_i_m3_m3 __attribute__ ((aligned(16)));
__m128i a_i_m3_m1 __attribute__ ((aligned(16)));
__m128i a_i_m3_p1 __attribute__ ((aligned(16)));
__m128i a_i_m3_p3 __attribute__ ((aligned(16)));
__m128i a_i_m3_p5 __attribute__ ((aligned(16)));
__m128i a_i_m3_p7 __attribute__ ((aligned(16)));
__m128i a_i_m1_m7 __attribute__ ((aligned(16)));
__m128i a_i_m1_m5 __attribute__ ((aligned(16)));
__m128i a_i_m1_m3 __attribute__ ((aligned(16)));
__m128i a_i_m1_m1 __attribute__ ((aligned(16)));
__m128i a_i_m1_p1 __attribute__ ((aligned(16)));
__m128i a_i_m1_p3 __attribute__ ((aligned(16)));
__m128i a_i_m1_p5 __attribute__ ((aligned(16)));
__m128i a_i_m1_p7 __attribute__ ((aligned(16)));
__m128i a_i_p1_m7 __attribute__ ((aligned(16)));
__m128i a_i_p1_m5 __attribute__ ((aligned(16)));
__m128i a_i_p1_m3 __attribute__ ((aligned(16)));
__m128i a_i_p1_m1 __attribute__ ((aligned(16)));
__m128i a_i_p1_p1 __attribute__ ((aligned(16)));
__m128i a_i_p1_p3 __attribute__ ((aligned(16)));
__m128i a_i_p1_p5 __attribute__ ((aligned(16)));
__m128i a_i_p1_p7 __attribute__ ((aligned(16)));
__m128i a_i_p3_m7 __attribute__ ((aligned(16)));
__m128i a_i_p3_m5 __attribute__ ((aligned(16)));
__m128i a_i_p3_m3 __attribute__ ((aligned(16)));
__m128i a_i_p3_m1 __attribute__ ((aligned(16)));
__m128i a_i_p3_p1 __attribute__ ((aligned(16)));
__m128i a_i_p3_p3 __attribute__ ((aligned(16)));
__m128i a_i_p3_p5 __attribute__ ((aligned(16)));
__m128i a_i_p3_p7 __attribute__ ((aligned(16)));
__m128i a_i_p5_m7 __attribute__ ((aligned(16)));
__m128i a_i_p5_m5 __attribute__ ((aligned(16)));
__m128i a_i_p5_m3 __attribute__ ((aligned(16)));
__m128i a_i_p5_m1 __attribute__ ((aligned(16)));
__m128i a_i_p5_p1 __attribute__ ((aligned(16)));
__m128i a_i_p5_p3 __attribute__ ((aligned(16)));
__m128i a_i_p5_p5 __attribute__ ((aligned(16)));
__m128i a_i_p5_p7 __attribute__ ((aligned(16)));
__m128i a_i_p7_m7 __attribute__ ((aligned(16)));
__m128i a_i_p7_m5 __attribute__ ((aligned(16)));
__m128i a_i_p7_m3 __attribute__ ((aligned(16)));
__m128i a_i_p7_m1 __attribute__ ((aligned(16)));
__m128i a_i_p7_p1 __attribute__ ((aligned(16)));
__m128i a_i_p7_p3 __attribute__ ((aligned(16)));
__m128i a_i_p7_p5 __attribute__ ((aligned(16)));
__m128i a_i_p7_p7 __attribute__ ((aligned(16)));

__m128i psi_a_m7_m7 __attribute__ ((aligned(16)));
__m128i psi_a_m7_m5 __attribute__ ((aligned(16)));
__m128i psi_a_m7_m3 __attribute__ ((aligned(16)));
__m128i psi_a_m7_m1 __attribute__ ((aligned(16)));
__m128i psi_a_m7_p1 __attribute__ ((aligned(16)));
__m128i psi_a_m7_p3 __attribute__ ((aligned(16)));
__m128i psi_a_m7_p5 __attribute__ ((aligned(16)));
__m128i psi_a_m7_p7 __attribute__ ((aligned(16)));
__m128i psi_a_m5_m7 __attribute__ ((aligned(16)));
__m128i psi_a_m5_m5 __attribute__ ((aligned(16)));
__m128i psi_a_m5_m3 __attribute__ ((aligned(16)));
__m128i psi_a_m5_m1 __attribute__ ((aligned(16)));
__m128i psi_a_m5_p1 __attribute__ ((aligned(16)));
__m128i psi_a_m5_p3 __attribute__ ((aligned(16)));
__m128i psi_a_m5_p5 __attribute__ ((aligned(16)));
__m128i psi_a_m5_p7 __attribute__ ((aligned(16)));
__m128i psi_a_m3_m7 __attribute__ ((aligned(16)));
__m128i psi_a_m3_m5 __attribute__ ((aligned(16)));
__m128i psi_a_m3_m3 __attribute__ ((aligned(16)));
__m128i psi_a_m3_m1 __attribute__ ((aligned(16)));
__m128i psi_a_m3_p1 __attribute__ ((aligned(16)));
__m128i psi_a_m3_p3 __attribute__ ((aligned(16)));
__m128i psi_a_m3_p5 __attribute__ ((aligned(16)));
__m128i psi_a_m3_p7 __attribute__ ((aligned(16)));
__m128i psi_a_m1_m7 __attribute__ ((aligned(16)));
__m128i psi_a_m1_m5 __attribute__ ((aligned(16)));
__m128i psi_a_m1_m3 __attribute__ ((aligned(16)));
__m128i psi_a_m1_m1 __attribute__ ((aligned(16)));
__m128i psi_a_m1_p1 __attribute__ ((aligned(16)));
__m128i psi_a_m1_p3 __attribute__ ((aligned(16)));
__m128i psi_a_m1_p5 __attribute__ ((aligned(16)));
__m128i psi_a_m1_p7 __attribute__ ((aligned(16)));
__m128i psi_a_p1_m7 __attribute__ ((aligned(16)));
__m128i psi_a_p1_m5 __attribute__ ((aligned(16)));
__m128i psi_a_p1_m3 __attribute__ ((aligned(16)));
__m128i psi_a_p1_m1 __attribute__ ((aligned(16)));
__m128i psi_a_p1_p1 __attribute__ ((aligned(16)));
__m128i psi_a_p1_p3 __attribute__ ((aligned(16)));
__m128i psi_a_p1_p5 __attribute__ ((aligned(16)));
__m128i psi_a_p1_p7 __attribute__ ((aligned(16)));
__m128i psi_a_p3_m7 __attribute__ ((aligned(16)));
__m128i psi_a_p3_m5 __attribute__ ((aligned(16)));
__m128i psi_a_p3_m3 __attribute__ ((aligned(16)));
__m128i psi_a_p3_m1 __attribute__ ((aligned(16)));
__m128i psi_a_p3_p1 __attribute__ ((aligned(16)));
__m128i psi_a_p3_p3 __attribute__ ((aligned(16)));
__m128i psi_a_p3_p5 __attribute__ ((aligned(16)));
__m128i psi_a_p3_p7 __attribute__ ((aligned(16)));
__m128i psi_a_p5_m7 __attribute__ ((aligned(16)));
__m128i psi_a_p5_m5 __attribute__ ((aligned(16)));
__m128i psi_a_p5_m3 __attribute__ ((aligned(16)));
__m128i psi_a_p5_m1 __attribute__ ((aligned(16)));
__m128i psi_a_p5_p1 __attribute__ ((aligned(16)));
__m128i psi_a_p5_p3 __attribute__ ((aligned(16)));
__m128i psi_a_p5_p5 __attribute__ ((aligned(16)));
__m128i psi_a_p5_p7 __attribute__ ((aligned(16)));
__m128i psi_a_p7_m7 __attribute__ ((aligned(16)));
__m128i psi_a_p7_m5 __attribute__ ((aligned(16)));
__m128i psi_a_p7_m3 __attribute__ ((aligned(16)));
__m128i psi_a_p7_m1 __attribute__ ((aligned(16)));
__m128i psi_a_p7_p1 __attribute__ ((aligned(16)));
__m128i psi_a_p7_p3 __attribute__ ((aligned(16)));
__m128i psi_a_p7_p5 __attribute__ ((aligned(16)));
__m128i psi_a_p7_p7 __attribute__ ((aligned(16)));

__m128i a_sq_m7_m7 __attribute__ ((aligned(16)));
__m128i a_sq_m7_m5 __attribute__ ((aligned(16)));
__m128i a_sq_m7_m3 __attribute__ ((aligned(16)));
__m128i a_sq_m7_m1 __attribute__ ((aligned(16)));
__m128i a_sq_m7_p1 __attribute__ ((aligned(16)));
__m128i a_sq_m7_p3 __attribute__ ((aligned(16)));
__m128i a_sq_m7_p5 __attribute__ ((aligned(16)));
__m128i a_sq_m7_p7 __attribute__ ((aligned(16)));
__m128i a_sq_m5_m7 __attribute__ ((aligned(16)));
__m128i a_sq_m5_m5 __attribute__ ((aligned(16)));
__m128i a_sq_m5_m3 __attribute__ ((aligned(16)));
__m128i a_sq_m5_m1 __attribute__ ((aligned(16)));
__m128i a_sq_m5_p1 __attribute__ ((aligned(16)));
__m128i a_sq_m5_p3 __attribute__ ((aligned(16)));
__m128i a_sq_m5_p5 __attribute__ ((aligned(16)));
__m128i a_sq_m5_p7 __attribute__ ((aligned(16)));
__m128i a_sq_m3_m7 __attribute__ ((aligned(16)));
__m128i a_sq_m3_m5 __attribute__ ((aligned(16)));
__m128i a_sq_m3_m3 __attribute__ ((aligned(16)));
__m128i a_sq_m3_m1 __attribute__ ((aligned(16)));
__m128i a_sq_m3_p1 __attribute__ ((aligned(16)));
__m128i a_sq_m3_p3 __attribute__ ((aligned(16)));
__m128i a_sq_m3_p5 __attribute__ ((aligned(16)));
__m128i a_sq_m3_p7 __attribute__ ((aligned(16)));
__m128i a_sq_m1_m7 __attribute__ ((aligned(16)));
__m128i a_sq_m1_m5 __attribute__ ((aligned(16)));
__m128i a_sq_m1_m3 __attribute__ ((aligned(16)));
__m128i a_sq_m1_m1 __attribute__ ((aligned(16)));
__m128i a_sq_m1_p1 __attribute__ ((aligned(16)));
__m128i a_sq_m1_p3 __attribute__ ((aligned(16)));
__m128i a_sq_m1_p5 __attribute__ ((aligned(16)));
__m128i a_sq_m1_p7 __attribute__ ((aligned(16)));
__m128i a_sq_p1_m7 __attribute__ ((aligned(16)));
__m128i a_sq_p1_m5 __attribute__ ((aligned(16)));
__m128i a_sq_p1_m3 __attribute__ ((aligned(16)));
__m128i a_sq_p1_m1 __attribute__ ((aligned(16)));
__m128i a_sq_p1_p1 __attribute__ ((aligned(16)));
__m128i a_sq_p1_p3 __attribute__ ((aligned(16)));
__m128i a_sq_p1_p5 __attribute__ ((aligned(16)));
__m128i a_sq_p1_p7 __attribute__ ((aligned(16)));
__m128i a_sq_p3_m7 __attribute__ ((aligned(16)));
__m128i a_sq_p3_m5 __attribute__ ((aligned(16)));
__m128i a_sq_p3_m3 __attribute__ ((aligned(16)));
__m128i a_sq_p3_m1 __attribute__ ((aligned(16)));
__m128i a_sq_p3_p1 __attribute__ ((aligned(16)));
__m128i a_sq_p3_p3 __attribute__ ((aligned(16)));
__m128i a_sq_p3_p5 __attribute__ ((aligned(16)));
__m128i a_sq_p3_p7 __attribute__ ((aligned(16)));
__m128i a_sq_p5_m7 __attribute__ ((aligned(16)));
__m128i a_sq_p5_m5 __attribute__ ((aligned(16)));
__m128i a_sq_p5_m3 __attribute__ ((aligned(16)));
__m128i a_sq_p5_m1 __attribute__ ((aligned(16)));
__m128i a_sq_p5_p1 __attribute__ ((aligned(16)));
__m128i a_sq_p5_p3 __attribute__ ((aligned(16)));
__m128i a_sq_p5_p5 __attribute__ ((aligned(16)));
__m128i a_sq_p5_p7 __attribute__ ((aligned(16)));
__m128i a_sq_p7_m7 __attribute__ ((aligned(16)));
__m128i a_sq_p7_m5 __attribute__ ((aligned(16)));
__m128i a_sq_p7_m3 __attribute__ ((aligned(16)));
__m128i a_sq_p7_m1 __attribute__ ((aligned(16)));
__m128i a_sq_p7_p1 __attribute__ ((aligned(16)));
__m128i a_sq_p7_p3 __attribute__ ((aligned(16)));
__m128i a_sq_p7_p5 __attribute__ ((aligned(16)));
__m128i a_sq_p7_p7 __attribute__ ((aligned(16)));

__m128i bit_met_m7_m7 __attribute__ ((aligned(16)));
__m128i bit_met_m7_m5 __attribute__ ((aligned(16)));
__m128i bit_met_m7_m3 __attribute__ ((aligned(16)));
__m128i bit_met_m7_m1 __attribute__ ((aligned(16)));
__m128i bit_met_m7_p1 __attribute__ ((aligned(16)));
__m128i bit_met_m7_p3 __attribute__ ((aligned(16)));
__m128i bit_met_m7_p5 __attribute__ ((aligned(16)));
__m128i bit_met_m7_p7 __attribute__ ((aligned(16)));
__m128i bit_met_m5_m7 __attribute__ ((aligned(16)));
__m128i bit_met_m5_m5 __attribute__ ((aligned(16)));
__m128i bit_met_m5_m3 __attribute__ ((aligned(16)));
__m128i bit_met_m5_m1 __attribute__ ((aligned(16)));
__m128i bit_met_m5_p1 __attribute__ ((aligned(16)));
__m128i bit_met_m5_p3 __attribute__ ((aligned(16)));
__m128i bit_met_m5_p5 __attribute__ ((aligned(16)));
__m128i bit_met_m5_p7 __attribute__ ((aligned(16)));
__m128i bit_met_m3_m7 __attribute__ ((aligned(16)));
__m128i bit_met_m3_m5 __attribute__ ((aligned(16)));
__m128i bit_met_m3_m3 __attribute__ ((aligned(16)));
__m128i bit_met_m3_m1 __attribute__ ((aligned(16)));
__m128i bit_met_m3_p1 __attribute__ ((aligned(16)));
__m128i bit_met_m3_p3 __attribute__ ((aligned(16)));
__m128i bit_met_m3_p5 __attribute__ ((aligned(16)));
__m128i bit_met_m3_p7 __attribute__ ((aligned(16)));
__m128i bit_met_m1_m7 __attribute__ ((aligned(16)));
__m128i bit_met_m1_m5 __attribute__ ((aligned(16)));
__m128i bit_met_m1_m3 __attribute__ ((aligned(16)));
__m128i bit_met_m1_m1 __attribute__ ((aligned(16)));
__m128i bit_met_m1_p1 __attribute__ ((aligned(16)));
__m128i bit_met_m1_p3 __attribute__ ((aligned(16)));
__m128i bit_met_m1_p5 __attribute__ ((aligned(16)));
__m128i bit_met_m1_p7 __attribute__ ((aligned(16)));
__m128i bit_met_p1_m7 __attribute__ ((aligned(16)));
__m128i bit_met_p1_m5 __attribute__ ((aligned(16)));
__m128i bit_met_p1_m3 __attribute__ ((aligned(16)));
__m128i bit_met_p1_m1 __attribute__ ((aligned(16)));
__m128i bit_met_p1_p1 __attribute__ ((aligned(16)));
__m128i bit_met_p1_p3 __attribute__ ((aligned(16)));
__m128i bit_met_p1_p5 __attribute__ ((aligned(16)));
__m128i bit_met_p1_p7 __attribute__ ((aligned(16)));
__m128i bit_met_p3_m7 __attribute__ ((aligned(16)));
__m128i bit_met_p3_m5 __attribute__ ((aligned(16)));
__m128i bit_met_p3_m3 __attribute__ ((aligned(16)));
__m128i bit_met_p3_m1 __attribute__ ((aligned(16)));
__m128i bit_met_p3_p1 __attribute__ ((aligned(16)));
__m128i bit_met_p3_p3 __attribute__ ((aligned(16)));
__m128i bit_met_p3_p5 __attribute__ ((aligned(16)));
__m128i bit_met_p3_p7 __attribute__ ((aligned(16)));
__m128i bit_met_p5_m7 __attribute__ ((aligned(16)));
__m128i bit_met_p5_m5 __attribute__ ((aligned(16)));
__m128i bit_met_p5_m3 __attribute__ ((aligned(16)));
__m128i bit_met_p5_m1 __attribute__ ((aligned(16)));
__m128i bit_met_p5_p1 __attribute__ ((aligned(16)));
__m128i bit_met_p5_p3 __attribute__ ((aligned(16)));
__m128i bit_met_p5_p5 __attribute__ ((aligned(16)));
__m128i bit_met_p5_p7 __attribute__ ((aligned(16)));
__m128i bit_met_p7_m7 __attribute__ ((aligned(16)));
__m128i bit_met_p7_m5 __attribute__ ((aligned(16)));
__m128i bit_met_p7_m3 __attribute__ ((aligned(16)));
__m128i bit_met_p7_m1 __attribute__ ((aligned(16)));
__m128i bit_met_p7_p1 __attribute__ ((aligned(16)));
__m128i bit_met_p7_p3 __attribute__ ((aligned(16)));
__m128i bit_met_p7_p5 __attribute__ ((aligned(16)));
__m128i bit_met_p7_p7 __attribute__ ((aligned(16)));

__m128i  y0_p_1_1 __attribute__ ((aligned(16)));
__m128i  y0_p_1_3 __attribute__ ((aligned(16)));
__m128i  y0_p_1_5 __attribute__ ((aligned(16)));
__m128i  y0_p_1_7 __attribute__ ((aligned(16)));
__m128i  y0_p_3_1 __attribute__ ((aligned(16)));
__m128i  y0_p_3_3 __attribute__ ((aligned(16)));
__m128i  y0_p_3_5 __attribute__ ((aligned(16)));
__m128i  y0_p_3_7 __attribute__ ((aligned(16)));
__m128i  y0_p_5_1 __attribute__ ((aligned(16)));
__m128i  y0_p_5_3 __attribute__ ((aligned(16)));
__m128i  y0_p_5_5 __attribute__ ((aligned(16)));
__m128i  y0_p_5_7 __attribute__ ((aligned(16)));
__m128i  y0_p_7_1 __attribute__ ((aligned(16)));
__m128i  y0_p_7_3 __attribute__ ((aligned(16)));
__m128i  y0_p_7_5 __attribute__ ((aligned(16)));
__m128i  y0_p_7_7 __attribute__ ((aligned(16)));
__m128i  y0_m_1_1 __attribute__ ((aligned(16)));
__m128i  y0_m_1_3 __attribute__ ((aligned(16)));
__m128i  y0_m_1_5 __attribute__ ((aligned(16)));
__m128i  y0_m_1_7 __attribute__ ((aligned(16)));
__m128i  y0_m_3_1 __attribute__ ((aligned(16)));
__m128i  y0_m_3_3 __attribute__ ((aligned(16)));
__m128i  y0_m_3_5 __attribute__ ((aligned(16)));
__m128i  y0_m_3_7 __attribute__ ((aligned(16)));
__m128i  y0_m_5_1 __attribute__ ((aligned(16)));
__m128i  y0_m_5_3 __attribute__ ((aligned(16)));
__m128i  y0_m_5_5 __attribute__ ((aligned(16)));
__m128i  y0_m_5_7 __attribute__ ((aligned(16)));
__m128i  y0_m_7_1 __attribute__ ((aligned(16)));
__m128i  y0_m_7_3 __attribute__ ((aligned(16)));
__m128i  y0_m_7_5 __attribute__ ((aligned(16)));
__m128i  y0_m_7_7 __attribute__ ((aligned(16)));

__m128i  xmm0 __attribute__ ((aligned(16)));
__m128i  xmm1 __attribute__ ((aligned(16)));
__m128i  xmm2 __attribute__ ((aligned(16)));
__m128i  xmm3 __attribute__ ((aligned(16)));
__m128i  xmm4 __attribute__ ((aligned(16)));
__m128i  xmm5 __attribute__ ((aligned(16)));
__m128i  xmm6 __attribute__ ((aligned(16)));
__m128i  xmm7 __attribute__ ((aligned(16)));
__m128i  xmm8 __attribute__ ((aligned(16)));

__m128i  y0r __attribute__ ((aligned(16)));
__m128i  y0i __attribute__ ((aligned(16)));
__m128i  y1r __attribute__ ((aligned(16)));
__m128i  y1i __attribute__ ((aligned(16)));
__m128i  y2r __attribute__ ((aligned(16)));
__m128i  y2i __attribute__ ((aligned(16)));

__m128i  logmax_num_re0 __attribute__ ((aligned(16)));
__m128i  logmax_num_im0 __attribute__ ((aligned(16)));
__m128i  logmax_den_re0 __attribute__ ((aligned(16)));
__m128i  logmax_den_im0 __attribute__ ((aligned(16)));
__m128i  logmax_num_re1 __attribute__ ((aligned(16)));
__m128i  logmax_num_im1 __attribute__ ((aligned(16)));
__m128i  logmax_den_re1 __attribute__ ((aligned(16)));
__m128i  logmax_den_im1 __attribute__ ((aligned(16)));

__m128i tmp_result  __attribute__ ((aligned(16)));
__m128i tmp_result2 __attribute__ ((aligned(16)));
__m128i tmp_result3 __attribute__ ((aligned(16)));
__m128i tmp_result4 __attribute__ ((aligned(16)));
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//==============================================================================================
// Auxiliary Makros

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// calculates psi_a = psi_r*a_r + psi_i*a_i
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#define prodsum_psi_a_epi16(psi_r,a_r,psi_i,a_i,psi_a) tmp_result = _mm_mulhi_epi16(psi_r,a_r); tmp_result = _mm_slli_epi16(tmp_result,1); tmp_result2 = _mm_mulhi_epi16(psi_i,a_i); tmp_result2 = _mm_slli_epi16(tmp_result2,1); psi_a = _mm_adds_epi16(tmp_result,tmp_result2);

// calculate interference magnitude
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#define interference_abs_epi16(psi,int_ch_mag,int_mag,c1,c2) tmp_result = _mm_cmplt_epi16(psi,int_ch_mag); tmp_result2 = _mm_xor_si128(tmp_result,(*(__m128i*)&ones[0])); tmp_result = _mm_and_si128(tmp_result,c1); tmp_result2 = _mm_and_si128(tmp_result2,c2); int_mag = _mm_or_si128(tmp_result,tmp_result2);
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// calculate interference magnitude
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// tmp_result = ones in shorts corr. to interval 2<=x<=4, tmp_result2 interval < 2, tmp_result3 interval 4<x<6 and tmp_result4 interval x>6
#define interference_abs_64qam_epi16(psi,int_ch_mag,int_two_ch_mag,int_three_ch_mag,a,c1,c3,c5,c7) tmp_result = _mm_cmplt_epi16(psi,int_two_ch_mag); tmp_result3 = _mm_xor_si128(tmp_result,(*(__m128i*)&ones[0])); tmp_result2 = _mm_cmplt_epi16(psi,int_ch_mag); tmp_result = _mm_xor_si128(tmp_result,tmp_result2); tmp_result4 = _mm_cmpgt_epi16(psi,int_three_ch_mag); tmp_result3 = _mm_xor_si128(tmp_result3,tmp_result4); tmp_result = _mm_and_si128(tmp_result,c3); tmp_result2 = _mm_and_si128(tmp_result2,c1); tmp_result3 = _mm_and_si128(tmp_result3,c5); tmp_result4 = _mm_and_si128(tmp_result4,c7); tmp_result = _mm_or_si128(tmp_result,tmp_result2); tmp_result3 = _mm_or_si128(tmp_result3,tmp_result4); a = _mm_or_si128(tmp_result,tmp_result3);
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// calculates a_sq = int_ch_mag*(a_r^2 + a_i^2)*scale_factor
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#define square_a_epi16(a_r,a_i,int_ch_mag,scale_factor,a_sq) tmp_result = _mm_mulhi_epi16(a_r,a_r); tmp_result = _mm_slli_epi16(tmp_result,1); tmp_result = _mm_mulhi_epi16(tmp_result,scale_factor); tmp_result = _mm_slli_epi16(tmp_result,1); tmp_result = _mm_mulhi_epi16(tmp_result,int_ch_mag); tmp_result = _mm_slli_epi16(tmp_result,1); tmp_result2 = _mm_mulhi_epi16(a_i,a_i); tmp_result2 = _mm_slli_epi16(tmp_result2,1); tmp_result2 = _mm_mulhi_epi16(tmp_result2,scale_factor); tmp_result2 = _mm_slli_epi16(tmp_result2,1); tmp_result2 = _mm_mulhi_epi16(tmp_result2,int_ch_mag); tmp_result2 = _mm_slli_epi16(tmp_result2,1); a_sq = _mm_adds_epi16(tmp_result,tmp_result2);

// calculates a_sq = int_ch_mag*(a_r^2 + a_i^2)*scale_factor for 64-QAM
#define square_a_64qam_epi16(a_r,a_i,int_ch_mag,scale_factor,a_sq)  tmp_result = _mm_mulhi_epi16(a_r,a_r); tmp_result = _mm_slli_epi16(tmp_result,1); tmp_result = _mm_mulhi_epi16(tmp_result,scale_factor); tmp_result = _mm_slli_epi16(tmp_result,3); tmp_result = _mm_mulhi_epi16(tmp_result,int_ch_mag); tmp_result = _mm_slli_epi16(tmp_result,1); tmp_result2 = _mm_mulhi_epi16(a_i,a_i); tmp_result2 = _mm_slli_epi16(tmp_result2,1); tmp_result2 = _mm_mulhi_epi16(tmp_result2,scale_factor); tmp_result2 = _mm_slli_epi16(tmp_result2,3); tmp_result2 = _mm_mulhi_epi16(tmp_result2,int_ch_mag); tmp_result2 = _mm_slli_epi16(tmp_result2,1); a_sq = _mm_adds_epi16(tmp_result,tmp_result2);

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#elif defined(__arm__)

#endif

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//==============================================================================================
// SINGLE-STREAM
//==============================================================================================

//----------------------------------------------------------------------------------------------
// QPSK
//----------------------------------------------------------------------------------------------

int dlsch_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
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                   int32_t **rxdataF_comp,
                   int16_t *dlsch_llr,
                   uint8_t symbol,
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                   uint8_t first_symbol_flag,
                   uint16_t nb_rb,
                   uint16_t pbch_pss_sss_adjust,
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                   int16_t **llr32p)
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{
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  uint32_t *rxF = (uint32_t*)&rxdataF_comp[0][((int32_t)symbol*frame_parms->N_RB_DL*12)];
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  uint32_t *llr32;
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  int i,len;
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  uint8_t symbol_mod = (symbol >= (7-frame_parms->Ncp))? (symbol-(7-frame_parms->Ncp)) : symbol;
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  if (first_symbol_flag==1) {
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    llr32 = (uint32_t*)dlsch_llr;
  } else {
    llr32 = (uint32_t*)(*llr32p);
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  }
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  if (!llr32) {
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    msg("dlsch_qpsk_llr: llr is null, symbol %d, llr32=%p\n",symbol, llr32);
    return(-1);
  }
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  if ((symbol_mod==0) || (symbol_mod==(4-frame_parms->Ncp))) {
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    if (frame_parms->mode1_flag==0)
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      len = (nb_rb*8) - (2*pbch_pss_sss_adjust/3);
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    else
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      len = (nb_rb*10) - (5*pbch_pss_sss_adjust/6);
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  } else {
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    len = (nb_rb*12) - pbch_pss_sss_adjust;
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  }
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  //  printf("dlsch_qpsk_llr: symbol %d,nb_rb %d, len %d,pbch_pss_sss_adjust %d\n",symbol,nb_rb,len,pbch_pss_sss_adjust);
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  for (i=0; i<len; i++) {
    *llr32 = *rxF;
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    //    printf("llr %d : (%d,%d)\n",i,((int16_t*)llr32)[0],((int16_t*)llr32)[1]);
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    rxF++;
    llr32++;
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  }

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  *llr32p = (int16_t *)llr32;
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  return(0);
}

//----------------------------------------------------------------------------------------------
// 16-QAM
//----------------------------------------------------------------------------------------------

void dlsch_16qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
692 693 694 695
                     int32_t **rxdataF_comp,
                     int16_t *dlsch_llr,
                     int32_t **dl_ch_mag,
                     uint8_t symbol,
696
                     uint8_t first_symbol_flag,
697
                     uint16_t nb_rb,
698
                     uint16_t pbch_pss_sss_adjust,
699 700 701
                     int16_t **llr32p)
{

702
#if defined(__x86_64__) || defined(__i386__)
703 704 705
  __m128i *rxF = (__m128i*)&rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  __m128i *ch_mag;
  __m128i llr128[2];
706 707 708 709 710 711 712 713 714
  uint32_t *llr32;
#elif defined(__arm__)
  int16x8_t *rxF = (int16x8_t*)&rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int16x8_t *ch_mag;
  int16x8_t xmm0;
  int16_t *llr16;
#endif


715 716 717 718
  int i,len;
  unsigned char symbol_mod,len_mod4=0;


719
#if defined(__x86_64__) || defined(__i386__)
720 721 722 723 724
  if (first_symbol_flag==1) {
    llr32 = (uint32_t*)dlsch_llr;
  } else {
    llr32 = (uint32_t*)*llr32p;
  }
725 726 727 728 729 730 731
#elif defined(__arm__)
  if (first_symbol_flag==1) {
    llr16 = (int16_t*)dlsch_llr;
  } else {
    llr16 = (int16_t*)*llr32p;
  }
#endif
732 733 734

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

735
#if defined(__x86_64__) || defined(__i386__)
736
  ch_mag = (__m128i*)&dl_ch_mag[0][(symbol*frame_parms->N_RB_DL*12)];
737 738 739
#elif defined(__arm__)
  ch_mag = (int16x8_t*)&dl_ch_mag[0][(symbol*frame_parms->N_RB_DL*12)];
#endif
740 741 742
  if ((symbol_mod==0) || (symbol_mod==(4-frame_parms->Ncp))) {
    if (frame_parms->mode1_flag==0)
      len = nb_rb*8 - (2*pbch_pss_sss_adjust/3);
743
    else
744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760
      len = nb_rb*10 - (5*pbch_pss_sss_adjust/6);
  } else {
    len = nb_rb*12 - pbch_pss_sss_adjust;
  }

  // update output pointer according to number of REs in this symbol (<<2 because 4 bits per RE)
  if (first_symbol_flag == 1)
    *llr32p = dlsch_llr + (len<<2);
  else
    *llr32p += (len<<2);

  len_mod4 = len&3;
  len>>=2;  // length in quad words (4 REs)
  len+=(len_mod4==0 ? 0 : 1);

  for (i=0; i<len; i++) {

761
#if defined(__x86_64__) || defined(__i386)
762 763 764 765 766 767 768 769 770 771 772 773 774 775 776
    xmm0 = _mm_abs_epi16(rxF[i]);
    xmm0 = _mm_subs_epi16(ch_mag[i],xmm0);

    // lambda_1=y_R, lambda_2=|y_R|-|h|^2, lamda_3=y_I, lambda_4=|y_I|-|h|^2
    llr128[0] = _mm_unpacklo_epi32(rxF[i],xmm0);
    llr128[1] = _mm_unpackhi_epi32(rxF[i],xmm0);
    llr32[0] = _mm_extract_epi32(llr128[0],0); //((uint32_t *)&llr128[0])[0];
    llr32[1] = _mm_extract_epi32(llr128[0],1); //((uint32_t *)&llr128[0])[1];
    llr32[2] = _mm_extract_epi32(llr128[0],2); //((uint32_t *)&llr128[0])[2];
    llr32[3] = _mm_extract_epi32(llr128[0],3); //((uint32_t *)&llr128[0])[3];
    llr32[4] = _mm_extract_epi32(llr128[1],0); //((uint32_t *)&llr128[1])[0];
    llr32[5] = _mm_extract_epi32(llr128[1],1); //((uint32_t *)&llr128[1])[1];
    llr32[6] = _mm_extract_epi32(llr128[1],2); //((uint32_t *)&llr128[1])[2];
    llr32[7] = _mm_extract_epi32(llr128[1],3); //((uint32_t *)&llr128[1])[3];
    llr32+=8;
777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800
#elif defined(__arm__)
    xmm0 = vabsq_s16(rxF[i]);
    xmm0 = vqsubq_s16(ch_mag[i],xmm0);
    // lambda_1=y_R, lambda_2=|y_R|-|h|^2, lamda_3=y_I, lambda_4=|y_I|-|h|^2

    llr16[0] = vgetq_lane_s16(rxF[i],0);
    llr16[1] = vgetq_lane_s16(rxF[i],1);
    llr16[2] = vgetq_lane_s16(xmm0,0);
    llr16[3] = vgetq_lane_s16(xmm0,1);
    llr16[4] = vgetq_lane_s16(rxF[i],2);
    llr16[5] = vgetq_lane_s16(rxF[i],3);
    llr16[6] = vgetq_lane_s16(xmm0,2);
    llr16[7] = vgetq_lane_s16(xmm0,3);
    llr16[8] = vgetq_lane_s16(rxF[i],4);
    llr16[9] = vgetq_lane_s16(rxF[i],5);
    llr16[10] = vgetq_lane_s16(xmm0,4);
    llr16[11] = vgetq_lane_s16(xmm0,5);
    llr16[12] = vgetq_lane_s16(rxF[i],6);
    llr16[13] = vgetq_lane_s16(rxF[i],6);
    llr16[14] = vgetq_lane_s16(xmm0,7);
    llr16[15] = vgetq_lane_s16(xmm0,7);
    llr16+=16;
#endif

801
  }
802

803
#if defined(__x86_64__) || defined(__i386__)
804 805
  _mm_empty();
  _m_empty();
806
#endif
807 808 809 810 811 812 813
}

//----------------------------------------------------------------------------------------------
// 64-QAM
//----------------------------------------------------------------------------------------------

void dlsch_64qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
814 815 816 817 818
                     int32_t **rxdataF_comp,
                     int16_t *dlsch_llr,
                     int32_t **dl_ch_mag,
                     int32_t **dl_ch_magb,
                     uint8_t symbol,
819
                     uint8_t first_symbol_flag,
820
                     uint16_t nb_rb,
821
                     uint16_t pbch_pss_sss_adjust,
822
                     int16_t **llr_save)
823
{
824
#if defined(__x86_64__) || defined(__i386__)
825 826
  __m128i *rxF = (__m128i*)&rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  __m128i *ch_mag,*ch_magb;
827 828 829 830
#elif defined(__arm__)
  int16x8_t *rxF = (int16x8_t*)&rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int16x8_t *ch_mag,*ch_magb,xmm1,xmm2;
#endif
831 832 833 834 835 836 837 838 839 840 841 842
  int i,len,len2;
  unsigned char symbol_mod,len_mod4;
  short *llr;
  int16_t *llr2;

  if (first_symbol_flag==1)
    llr = dlsch_llr;
  else
    llr = *llr_save;

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

843
#if defined(__x86_64__) || defined(__i386__)
844 845
  ch_mag = (__m128i*)&dl_ch_mag[0][(symbol*frame_parms->N_RB_DL*12)];
  ch_magb = (__m128i*)&dl_ch_magb[0][(symbol*frame_parms->N_RB_DL*12)];
846 847 848 849
#elif defined(__arm__)
  ch_mag = (int16x8_t*)&dl_ch_mag[0][(symbol*frame_parms->N_RB_DL*12)];
  ch_magb = (int16x8_t*)&dl_ch_magb[0][(symbol*frame_parms->N_RB_DL*12)];
#endif
850 851 852
  if ((symbol_mod==0) || (symbol_mod==(4-frame_parms->Ncp))) {
    if (frame_parms->mode1_flag==0)
      len = nb_rb*8 - (2*pbch_pss_sss_adjust/3);
853
    else
854 855 856 857 858 859 860 861 862 863 864 865 866 867
      len = nb_rb*10 - (5*pbch_pss_sss_adjust/6);
  } else {
    len = nb_rb*12 - pbch_pss_sss_adjust;
  }

  llr2 = llr;
  llr += (len*6);

  len_mod4 =len&3;
  len2=len>>2;  // length in quad words (4 REs)
  len2+=(len_mod4?0:1);

  for (i=0; i<len2; i++) {

868
#if defined(__x86_64__) || defined(__i386__)
869 870 871 872
    xmm1 = _mm_abs_epi16(rxF[i]);
    xmm1 = _mm_subs_epi16(ch_mag[i],xmm1);
    xmm2 = _mm_abs_epi16(xmm1);
    xmm2 = _mm_subs_epi16(ch_magb[i],xmm2);
873 874 875 876 877 878
#elif defined(__arm__)
    xmm1 = vabsq_s16(rxF[i]);
    xmm1 = vsubq_s16(ch_mag[i],xmm1);
    xmm2 = vabsq_s16(xmm1);
    xmm2 = vsubq_s16(ch_magb[i],xmm2);
#endif
879 880
    // loop over all LLRs in quad word (24 coded bits)
    /*
881 882 883 884 885 886 887 888 889 890
      for (j=0;j<8;j+=2) {
      llr2[0] = ((short *)&rxF[i])[j];
      llr2[1] = ((short *)&rxF[i])[j+1];
      llr2[2] = ((short *)&xmm1)[j];
      llr2[3] = ((short *)&xmm1)[j+1];
      llr2[4] = ((short *)&xmm2)[j];
      llr2[5] = ((short *)&xmm2)[j+1];

      llr2+=6;
      }
891 892 893
    */
    llr2[0] = ((short *)&rxF[i])[0];
    llr2[1] = ((short *)&rxF[i])[1];
894
#if defined(__x86_64__) || defined(__i386__)
895 896 897 898
    llr2[2] = _mm_extract_epi16(xmm1,0);
    llr2[3] = _mm_extract_epi16(xmm1,1);//((short *)&xmm1)[j+1];
    llr2[4] = _mm_extract_epi16(xmm2,0);//((short *)&xmm2)[j];
    llr2[5] = _mm_extract_epi16(xmm2,1);//((short *)&xmm2)[j+1];
899 900 901 902 903 904
#elif defined(__arm__)
    llr2[2] = vgetq_lane_s16(xmm1,0);
    llr2[3] = vgetq_lane_s16(xmm1,1);//((short *)&xmm1)[j+1];
    llr2[4] = vgetq_lane_s16(xmm2,0);//((short *)&xmm2)[j];
    llr2[5] = vgetq_lane_s16(xmm2,1);//((short *)&xmm2)[j+1];
#endif
905 906 907 908

    llr2+=6;
    llr2[0] = ((short *)&rxF[i])[2];
    llr2[1] = ((short *)&rxF[i])[3];
909
#if defined(__x86_64__) || defined(__i386__)
910 911 912 913
    llr2[2] = _mm_extract_epi16(xmm1,2);
    llr2[3] = _mm_extract_epi16(xmm1,3);//((short *)&xmm1)[j+1];
    llr2[4] = _mm_extract_epi16(xmm2,2);//((short *)&xmm2)[j];
    llr2[5] = _mm_extract_epi16(xmm2,3);//((short *)&xmm2)[j+1];
914 915 916 917 918 919
#elif defined(__arm__)
    llr2[2] = vgetq_lane_s16(xmm1,2);
    llr2[3] = vgetq_lane_s16(xmm1,3);//((short *)&xmm1)[j+1];
    llr2[4] = vgetq_lane_s16(xmm2,2);//((short *)&xmm2)[j];
    llr2[5] = vgetq_lane_s16(xmm2,3);//((short *)&xmm2)[j+1];
#endif
920 921 922 923

    llr2+=6;
    llr2[0] = ((short *)&rxF[i])[4];
    llr2[1] = ((short *)&rxF[i])[5];
924
#if defined(__x86_64__) || defined(__i386__)
925 926 927 928
    llr2[2] = _mm_extract_epi16(xmm1,4);
    llr2[3] = _mm_extract_epi16(xmm1,5);//((short *)&xmm1)[j+1];
    llr2[4] = _mm_extract_epi16(xmm2,4);//((short *)&xmm2)[j];
    llr2[5] = _mm_extract_epi16(xmm2,5);//((short *)&xmm2)[j+1];
929 930 931 932 933 934
#elif defined(__arm__)
    llr2[2] = vgetq_lane_s16(xmm1,4);
    llr2[3] = vgetq_lane_s16(xmm1,5);//((short *)&xmm1)[j+1];
    llr2[4] = vgetq_lane_s16(xmm2,4);//((short *)&xmm2)[j];
    llr2[5] = vgetq_lane_s16(xmm2,5);//((short *)&xmm2)[j+1];
#endif
935 936 937
    llr2+=6;
    llr2[0] = ((short *)&rxF[i])[6];
    llr2[1] = ((short *)&rxF[i])[7];
938
#if defined(__x86_64__) || defined(__i386__)
939 940 941 942
    llr2[2] = _mm_extract_epi16(xmm1,6);
    llr2[3] = _mm_extract_epi16(xmm1,7);//((short *)&xmm1)[j+1];
    llr2[4] = _mm_extract_epi16(xmm2,6);//((short *)&xmm2)[j];
    llr2[5] = _mm_extract_epi16(xmm2,7);//((short *)&xmm2)[j+1];
943 944 945 946 947 948
#elif defined(__arm__)
    llr2[2] = vgetq_lane_s16(xmm1,6);
    llr2[3] = vgetq_lane_s16(xmm1,7);//((short *)&xmm1)[j+1];
    llr2[4] = vgetq_lane_s16(xmm2,6);//((short *)&xmm2)[j];
    llr2[5] = vgetq_lane_s16(xmm2,7);//((short *)&xmm2)[j+1];
#endif
949 950 951 952 953
    llr2+=6;

  }

  *llr_save = llr;
954
#if defined(__x86_64__) || defined(__i386__)
955 956
  _mm_empty();
  _m_empty();
957
#endif
958 959 960 961 962 963 964 965 966 967 968
}


//==============================================================================================
// DUAL-STREAM
//==============================================================================================

//----------------------------------------------------------------------------------------------
// QPSK
//----------------------------------------------------------------------------------------------

969 970 971 972 973 974 975 976 977 978 979 980 981 982
#if defined(__x86_64__) || defined(__i386)
__m128i  y0r_over2 __attribute__ ((aligned(16)));
__m128i  y0i_over2 __attribute__ ((aligned(16)));
__m128i  y1r_over2 __attribute__ ((aligned(16)));
__m128i  y1i_over2 __attribute__ ((aligned(16)));

__m128i  A __attribute__ ((aligned(16)));
__m128i  B __attribute__ ((aligned(16)));
__m128i  C __attribute__ ((aligned(16)));
__m128i  D __attribute__ ((aligned(16)));
__m128i  E __attribute__ ((aligned(16)));
__m128i  F __attribute__ ((aligned(16)));
__m128i  G __attribute__ ((aligned(16)));
__m128i  H __attribute__ ((aligned(16)));
983

984
#endif
985 986 987 988 989 990 991 992 993

int dlsch_qpsk_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
                        int **rxdataF_comp,
                        int **rxdataF_comp_i,
                        int **rho_i,
                        short *dlsch_llr,
                        unsigned char symbol,
                        unsigned char first_symbol_flag,
                        unsigned short nb_rb,
994
                        uint16_t pbch_pss_sss_adjust,
995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039
                        short **llr16p)
{

  int16_t *rxF=(int16_t*)&rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rxF_i=(int16_t*)&rxdataF_comp_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rho=(int16_t*)&rho_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *llr16;
  int len;
  uint8_t symbol_mod = (symbol >= (7-frame_parms->Ncp))? (symbol-(7-frame_parms->Ncp)) : symbol;

  if (first_symbol_flag == 1) {
    llr16 = (int16_t*)dlsch_llr;
  } else {
    llr16 = (int16_t*)(*llr16p);
  }

  if (!llr16) {
    msg("dlsch_qpsk_qpsk_llr: llr is null, symbol %d\n",symbol);
    return -1;
  }

  if ((symbol_mod==0) || (symbol_mod==(4-frame_parms->Ncp))) {
    // if symbol has pilots
    if (frame_parms->mode1_flag==0)
      // in 2 antenna ports we have 8 REs per symbol per RB
      len = (nb_rb*8) - (2*pbch_pss_sss_adjust/3);
    else
      // for 1 antenna port we have 10 REs per symbol per RB
      len = (nb_rb*10) - (5*pbch_pss_sss_adjust/6);
  } else {
    // symbol has no pilots
    len = (nb_rb*12) - pbch_pss_sss_adjust;
  }

  //    printf("qpsk_qpsk: len %d, llr16 %p\n",len,llr16);
  qpsk_qpsk((short *)rxF,
            (short *)rxF_i,
            (short *)llr16,
            (short *)rho,
            len);

  llr16 += (len<<1);
  *llr16p = (short *)llr16;

  return(0);
1040 1041
}

1042
//__m128i ONE_OVER_SQRT_8 __attribute__((aligned(16)));
1043 1044

void qpsk_qpsk(short *stream0_in,
1045
               short *stream1_in,
1046 1047 1048
               short *stream0_out,
               short *rho01,
               int length
1049
	       )
1050
{
1051

1052
  /*
1053 1054 1055 1056 1057 1058 1059 1060
    This function computes the LLRs of stream 0 (s_0) in presence of the interfering stream 1 (s_1) assuming that both symbols are QPSK. It can be used for both MU-MIMO interference-aware receiver or for SU-MIMO receivers.

    Parameters:
    stream0_in = Matched filter output y0' = (h0*g0)*y0
    stream1_in = Matched filter output y1' = (h0*g1)*y0
    stream0_out = LLRs
    rho01 = Correlation between the two effective channels \rho_{10} = (h1*g1)*(h0*g0)
    length = number of resource elements
1061
  */
1062

1063
#if defined(__x86_64__) || defined(__i386__)
1064 1065 1066 1067
  __m128i *rho01_128i = (__m128i *)rho01;
  __m128i *stream0_128i_in = (__m128i *)stream0_in;
  __m128i *stream1_128i_in = (__m128i *)stream1_in;
  __m128i *stream0_128i_out = (__m128i *)stream0_out;
1068 1069 1070 1071 1072 1073 1074
  __m128i ONE_OVER_SQRT_8 = _mm_set1_epi16(23170); //round(2^16/sqrt(8))
#elif defined(__arm__)
  int16x8_t *rho01_128i = (int16x8_t *)rho01;
  int16x8_t *stream0_128i_in = (int16x8_t *)stream0_in;
  int16x8_t *stream1_128i_in = (int16x8_t *)stream1_in;
  int16x8_t *stream0_128i_out = (int16x8_t *)stream0_out;
  int16x8_t ONE_OVER_SQRT_8 = vdupq_n_s16(23170); //round(2^16/sqrt(8))
1075 1076
#endif

1077
  int i;
1078

1079 1080 1081

  for (i=0; i<length>>2; i+=2) {
    // in each iteration, we take 8 complex samples
1082
#if defined(__x86_64__) || defined(__i386__)
1083 1084 1085 1086 1087
    xmm0 = rho01_128i[i]; // 4 symbols
    xmm1 = rho01_128i[i+1];

    // put (rho_r + rho_i)/2sqrt2 in rho_rpi
    // put (rho_r - rho_i)/2sqrt2 in rho_rmi
1088

1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104
    xmm0 = _mm_shufflelo_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shufflehi_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shuffle_epi32(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflelo_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflehi_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shuffle_epi32(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    //xmm0 = [Re(0,1) Re(2,3) Im(0,1) Im(2,3)]
    //xmm1 = [Re(4,5) Re(6,7) Im(4,5) Im(6,7)]
    xmm2 = _mm_unpacklo_epi64(xmm0,xmm1); // Re(rho)
    xmm3 = _mm_unpackhi_epi64(xmm0,xmm1); // Im(rho)
    rho_rpi = _mm_adds_epi16(xmm2,xmm3); // rho = Re(rho) + Im(rho)
    rho_rmi = _mm_subs_epi16(xmm2,xmm3); // rho* = Re(rho) - Im(rho)

    // divide by sqrt(8), no shift needed ONE_OVER_SQRT_8 = Q1.16
    rho_rpi = _mm_mulhi_epi16(rho_rpi,ONE_OVER_SQRT_8);
    rho_rmi = _mm_mulhi_epi16(rho_rmi,ONE_OVER_SQRT_8);
1105
#elif defined(__arm__)
1106

1107 1108

#endif
1109 1110 1111
    // Compute LLR for first bit of stream 0

    // Compute real and imaginary parts of MF output for stream 0
1112
#if defined(__x86_64__) || defined(__i386__)
1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128
    xmm0 = stream0_128i_in[i];
    xmm1 = stream0_128i_in[i+1];

    xmm0 = _mm_shufflelo_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shufflehi_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shuffle_epi32(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflelo_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflehi_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shuffle_epi32(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    //xmm0 = [Re(0,1) Re(2,3) Im(0,1) Im(2,3)]
    //xmm1 = [Re(4,5) Re(6,7) Im(4,5) Im(6,7)]
    y0r = _mm_unpacklo_epi64(xmm0,xmm1); // = [y0r(1),y0r(2),y0r(3),y0r(4)]
    y0i = _mm_unpackhi_epi64(xmm0,xmm1);

    y0r_over2  = _mm_srai_epi16(y0r,1);   // divide by 2
    y0i_over2  = _mm_srai_epi16(y0i,1);   // divide by 2
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#elif defined(__arm__)

1131

1132
#endif
1133
    // Compute real and imaginary parts of MF output for stream 1
1134
#if defined(__x86_64__) || defined(__i386__)
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    xmm0 = stream1_128i_in[i];
    xmm1 = stream1_128i_in[i+1];

    xmm0 = _mm_shufflelo_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shufflehi_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shuffle_epi32(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflelo_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflehi_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shuffle_epi32(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    //xmm0 = [Re(0,1) Re(2,3) Im(0,1) Im(2,3)]
    //xmm1 = [Re(4,5) Re(6,7) Im(4,5) Im(6,7)]
    y1r = _mm_unpacklo_epi64(xmm0,xmm1); //[y1r(1),y1r(2),y1r(3),y1r(4)]
    y1i = _mm_unpackhi_epi64(xmm0,xmm1); //[y1i(1),y1i(2),y1i(3),y1i(4)]

    y1r_over2  = _mm_srai_epi16(y1r,1);   // divide by 2
    y1i_over2  = _mm_srai_epi16(y1i,1);   // divide by 2

    // Compute the terms for the LLR of first bit

    xmm0 = _mm_setzero_si128(); // ZERO

    // 1 term for numerator of LLR
    xmm3 = _mm_subs_epi16(y1r_over2,rho_rpi);
    A = _mm_abs_epi16(xmm3); // A = |y1r/2 - rho/sqrt(8)|
    xmm2 = _mm_adds_epi16(A,y0i_over2); // = |y1r/2 - rho/sqrt(8)| + y0i/2
    xmm3 = _mm_subs_epi16(y1i_over2,rho_rmi);
    B = _mm_abs_epi16(xmm3); // B = |y1i/2 - rho*/sqrt(8)|
    logmax_num_re0 = _mm_adds_epi16(B,xmm2); // = |y1r/2 - rho/sqrt(8)|+|y1i/2 - rho*/sqrt(8)| + y0i/2

    // 2 term for numerator of LLR
    xmm3 = _mm_subs_epi16(y1r_over2,rho_rmi);
    C = _mm_abs_epi16(xmm3); // C = |y1r/2 - rho*/4|
    xmm2 = _mm_subs_epi16(C,y0i_over2); // = |y1r/2 - rho*/4| - y0i/2
    xmm3 = _mm_adds_epi16(y1i_over2,rho_rpi);
    D = _mm_abs_epi16(xmm3); // D = |y1i/2 + rho/4|
    xmm2 = _mm_adds_epi16(xmm2,D); // |y1r/2 - rho*/4| + |y1i/2 + rho/4| - y0i/2
    logmax_num_re0 = _mm_max_epi16(logmax_num_re0,xmm2); // max, numerator done

    // 1 term for denominator of LLR
    xmm3 = _mm_adds_epi16(y1r_over2,rho_rmi);
    E = _mm_abs_epi16(xmm3); // E = |y1r/2 + rho*/4|
    xmm2 = _mm_adds_epi16(E,y0i_over2); // = |y1r/2 + rho*/4| + y0i/2
    xmm3 = _mm_subs_epi16(y1i_over2,rho_rpi);
    F = _mm_abs_epi16(xmm3); // F = |y1i/2 - rho/4|
    logmax_den_re0 = _mm_adds_epi16(F,xmm2); // = |y1r/2 + rho*/4| + |y1i/2 - rho/4| + y0i/2

    // 2 term for denominator of LLR
    xmm3 = _mm_adds_epi16(y1r_over2,rho_rpi);
    G = _mm_abs_epi16(xmm3); // G = |y1r/2 + rho/4|
    xmm2 = _mm_subs_epi16(G,y0i_over2); // = |y1r/2 + rho/4| - y0i/2
    xmm3 = _mm_adds_epi16(y1i_over2,rho_rmi);
    H = _mm_abs_epi16(xmm3); // H = |y1i/2 + rho*/4|
    xmm2 = _mm_adds_epi16(xmm2,H); // = |y1r/2 + rho/4| + |y1i/2 + rho*/4| - y0i/2
    logmax_den_re0 = _mm_max_epi16(logmax_den_re0,xmm2); // max, denominator done

    // Compute the terms for the LLR of first bit

    // 1 term for nominator of LLR
    xmm2 = _mm_adds_epi16(A,y0r_over2);
    logmax_num_im0 = _mm_adds_epi16(B,xmm2); // = |y1r/2 - rho/4| + |y1i/2 - rho*/4| + y0r/2

    // 2 term for nominator of LLR
    xmm2 = _mm_subs_epi16(E,y0r_over2);
    xmm2 = _mm_adds_epi16(xmm2,F); // = |y1r/2 + rho*/4| + |y1i/2 - rho/4| - y0r/2

    logmax_num_im0 = _mm_max_epi16(logmax_num_im0,xmm2); // max, nominator done

    // 1 term for denominator of LLR
    xmm2 = _mm_adds_epi16(C,y0r_over2);
    logmax_den_im0 = _mm_adds_epi16(D,xmm2); // = |y1r/2 - rho*/4| + |y1i/2 + rho/4| - y0r/2

    xmm2 = _mm_subs_epi16(G,y0r_over2);
    xmm2 = _mm_adds_epi16(xmm2,H); // = |y1r/2 + rho/4| + |y1i/2 + rho*/4| - y0r/2

    logmax_den_im0 = _mm_max_epi16(logmax_den_im0,xmm2); // max, denominator done

    // LLR of first bit [L1(1), L1(2), L1(3), L1(4)]
    y0r = _mm_adds_epi16(y0r,logmax_num_re0);
    y0r = _mm_subs_epi16(y0r,logmax_den_re0);

    // LLR of second bit [L2(1), L2(2), L2(3), L2(4)]
    y0i = _mm_adds_epi16(y0i,logmax_num_im0);
    y0i = _mm_subs_epi16(y0i,logmax_den_im0);

    _mm_storeu_si128(&stream0_128i_out[i],_mm_unpacklo_epi16(y0r,y0i)); // = [L1(1), L2(1), L1(2), L2(2)]

    if (i<((length>>1) - 1)) // false if only 2 REs remain
      _mm_storeu_si128(&stream0_128i_out[i+1],_mm_unpackhi_epi16(y0r,y0i));

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#elif defined(__x86_64__)

#endif
1227 1228
  }

1229
#if defined(__x86_64__) || defined(__i386__)
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  _mm_empty();
  _m_empty();
1232
#endif
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}

int dlsch_qpsk_16qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
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                         int32_t **rxdataF_comp,
                         int32_t **rxdataF_comp_i,
                         int32_t **dl_ch_mag_i, //|h_1|^2*(2/sqrt{10})
                         int32_t **rho_i,
                         int16_t *dlsch_llr,
                         uint8_t symbol,
                         uint8_t first_symbol_flag,
                         uint16_t nb_rb,
1244
                         uint16_t pbch_pss_sss_adjust,
1245
                         int16_t **llr16p)
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{

  int16_t *rxF=(int16_t*)&rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rxF_i=(int16_t*)&rxdataF_comp_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *ch_mag_i = (int16_t*)&dl_ch_mag_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rho=(int16_t*)&rho_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *llr16;
  int len;
  uint8_t symbol_mod = (symbol >= (7-frame_parms->Ncp))? (symbol-(7-frame_parms->Ncp)) : symbol;

  if (first_symbol_flag == 1) {
    llr16 = (int16_t*)dlsch_llr;
  } else {
    llr16 = (int16_t*)(*llr16p);
  }

  if (!llr16) {
    msg("dlsch_qpsk_qpsk_llr: llr is null, symbol %d\n",symbol);
    return -1;
  }

  if ((symbol_mod==0) || (symbol_mod==(4-frame_parms->Ncp))) {
    // if symbol has pilots
    if (frame_parms->mode1_flag==0)
      // in 2 antenna ports we have 8 REs per symbol per RB
      len = (nb_rb*8) - (2*pbch_pss_sss_adjust/3);
    else
      // for 1 antenna port we have 10 REs per symbol per RB
      len = (nb_rb*10) - (5*pbch_pss_sss_adjust/6);
  } else {
    // symbol has no pilots
    len = (nb_rb*12) - pbch_pss_sss_adjust;
  }

  qpsk_qam16((short *)rxF,
             (short *)rxF_i,
             (short *)ch_mag_i,
             (short *)llr16,
             (short *)rho,
             len);

  llr16 += (len<<1);
  *llr16p = (short *)llr16;

  return(0);
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}

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/*
#if defined(__x86_64__) || defined(__i386__)
__m128i ONE_OVER_SQRT_2 __attribute__((aligned(16)));
__m128i ONE_OVER_SQRT_10 __attribute__((aligned(16)));
__m128i THREE_OVER_SQRT_10 __attribute__((aligned(16)));
__m128i ONE_OVER_SQRT_10_Q15 __attribute__((aligned(16)));
__m128i SQRT_10_OVER_FOUR __attribute__((aligned(16)));
__m128i ch_mag_int;
#endif
*/
void qpsk_qam16(int16_t *stream0_in,
                int16_t *stream1_in,
                int16_t *ch_mag_i,
                int16_t *stream0_out,
                int16_t *rho01,
                int32_t length
		)
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{
  /*
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    This function computes the LLRs of stream 0 (s_0) in presence of the interfering stream 1 (s_1) assuming that both symbols are QPSK. It can be used for both MU-MIMO interference-aware receiver or for SU-MIMO receivers.

    Parameters:
    stream0_in = Matched filter output y0' = (h0*g0)*y0
    stream1_in = Matched filter output y1' = (h0*g1)*y0
    stream0_out = LLRs
    rho01 = Correlation between the two effective channels \rho_{10} = (h1*g1)*(h0*g0)
    length = number of resource elements
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  */

1322
#if defined(__x86_64__) || defined(__i386__)
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  __m128i *rho01_128i = (__m128i *)rho01;
  __m128i *stream0_128i_in = (__m128i *)stream0_in;
  __m128i *stream1_128i_in = (__m128i *)stream1_in;
  __m128i *stream0_128i_out = (__m128i *)stream0_out;
  __m128i *ch_mag_128i_i    = (__m128i *)ch_mag_i;
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  __m128i ONE_OVER_SQRT_2 = _mm_set1_epi16(23170); // round(1/sqrt(2)*2^15)
  __m128i ONE_OVER_SQRT_10_Q15 = _mm_set1_epi16(10362); // round(1/sqrt(10)*2^15)
  __m128i THREE_OVER_SQRT_10 = _mm_set1_epi16(31086); // round(3/sqrt(10)*2^15)
  __m128i SQRT_10_OVER_FOUR = _mm_set1_epi16(25905); // round(sqrt(10)/4*2^15)
  __m128i ch_mag_int __attribute__((aligned(16)));
#elif defined(__arm__)
  int16x8_t *rho01_128i = (int16x8_t *)rho01;
  int16x8_t *stream0_128i_in = (int16x8_t *)stream0_in;
  int16x8_t *stream1_128i_in = (int16x8_t *)stream1_in;
  int16x8_t *stream0_128i_out = (int16x8_t *)stream0_out;
  int16x8_t *ch_mag_128i_i    = (int16x8_t *)ch_mag_i;
  int16x8_t ONE_OVER_SQRT_2 = vdupq_n_s16(23170); // round(1/sqrt(2)*2^15)
  int16x8_t ONE_OVER_SQRT_10_Q15 = vdupq_n_s16(10362); // round(1/sqrt(10)*2^15)
  int16x8_t THREE_OVER_SQRT_10 = vdupq_n_s16(31086); // round(3/sqrt(10)*2^15)
  int16x8_t SQRT_10_OVER_FOUR = vdupq_n_s16(25905); // round(sqrt(10)/4*2^15)
  int16x8_t ch_mag_int __attribute__((aligned(16)));
#endif
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#ifdef DEBUG_LLR
1347
  print_shorts2("rho01_128i:\n",rho01_128i);
1348 1349
#endif

1350 1351 1352 1353 1354 1355
  int i;


  for (i=0; i<length>>2; i+=2) {
    // in each iteration, we take 8 complex samples

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#if defined(__x86_64__) || defined(__i386__)

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    xmm0 = rho01_128i[i]; // 4 symbols
    xmm1 = rho01_128i[i+1];

    // put (rho_r + rho_i)/2sqrt2 in rho_rpi
    // put (rho_r - rho_i)/2sqrt2 in rho_rmi
    xmm0 = _mm_shufflelo_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shufflehi_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shuffle_epi32(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflelo_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflehi_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shuffle_epi32(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    //xmm0 = [Re(0,1) Re(2,3) Im(0,1) Im(2,3)]
    //xmm1 = [Re(4,5) Re(6,7) Im(4,5) Im(6,7)]
    xmm2 = _mm_unpacklo_epi64(xmm0,xmm1); // Re(rho)
    xmm3 = _mm_unpackhi_epi64(xmm0,xmm1); // Im(rho)
    rho_rpi = _mm_adds_epi16(xmm2,xmm3); // rho = Re(rho) + Im(rho)
    rho_rmi = _mm_subs_epi16(xmm2,xmm3); // rho* = Re(rho) - Im(rho)

    // divide by sqrt(2)
    rho_rpi = _mm_mulhi_epi16(rho_rpi, ONE_OVER_SQRT_2);
    rho_rmi = _mm_mulhi_epi16(rho_rmi, ONE_OVER_SQRT_2);
    rho_rpi = _mm_slli_epi16(rho_rpi,1);
    rho_rmi = _mm_slli_epi16(rho_rmi,1);

    // Compute LLR for first bit of stream 0

    // Compute real and imaginary parts of MF output for stream 0
    xmm0 = stream0_128i_in[i];
    xmm1 = stream0_128i_in[i+1];

    xmm0 = _mm_shufflelo_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shufflehi_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shuffle_epi32(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflelo_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflehi_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shuffle_epi32(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    //xmm0 = [Re(0,1) Re(2,3) Im(0,1) Im(2,3)]
    //xmm1 = [Re(4,5) Re(6,7) Im(4,5) Im(6,7)]
    y0r = _mm_unpacklo_epi64(xmm0,xmm1); // = [y0r(1),y0r(2),y0r(3),y0r(4)]
    y0i = _mm_unpackhi_epi64(xmm0,xmm1);

    // divide by sqrt(2)
    y0r_over2 = _mm_mulhi_epi16(y0r, ONE_OVER_SQRT_2);
    y0i_over2 = _mm_mulhi_epi16(y0i, ONE_OVER_SQRT_2);
    y0r_over2  = _mm_slli_epi16(y0r,1);
    y0i_over2  = _mm_slli_epi16(y0i,1);

    y0_p_1_1 = _mm_adds_epi16(y0r_over2, y0i_over2);
    y0_m_1_1 = _mm_subs_epi16(y0r_over2, y0i_over2);

    // Compute real and imaginary parts of MF output for stream 1
    xmm0 = stream1_128i_in[i];
    xmm1 = stream1_128i_in[i+1];

    xmm0 = _mm_shufflelo_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shufflehi_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shuffle_epi32(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflelo_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflehi_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shuffle_epi32(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    //xmm0 = [Re(0,1) Re(2,3) Im(0,1) Im(2,3)]
    //xmm1 = [Re(4,5) Re(6,7) Im(4,5) Im(6,7)]
    y1r = _mm_unpacklo_epi64(xmm0,xmm1); //[y1r(1),y1r(2),y1r(3),y1r(4)]
    y1i = _mm_unpackhi_epi64(xmm0,xmm1); //[y1i(1),y1i(2),y1i(3),y1i(4)]

    xmm0 = _mm_setzero_si128(); // ZERO

    // compute psi
    xmm3 = _mm_subs_epi16(y1r,rho_rpi);
    psi_r_p1_p1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_subs_epi16(y1i,rho_rmi);
    psi_i_p1_p1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_subs_epi16(y1r,rho_rmi);
    psi_r_p1_m1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_adds_epi16(y1i,rho_rpi);
    psi_i_p1_m1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_adds_epi16(y1r,rho_rmi);
    psi_r_m1_p1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_subs_epi16(y1i,rho_rpi);
    psi_i_m1_p1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_adds_epi16(y1r,rho_rpi);
    psi_r_m1_m1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_adds_epi16(y1i,rho_rmi);
    psi_i_m1_m1 = _mm_abs_epi16(xmm3);

    // Rearrange interfering channel magnitudes
    xmm2 = ch_mag_128i_i[i];
    xmm3 = ch_mag_128i_i[i+1];

    xmm2 = _mm_shufflelo_epi16(xmm2,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm2 = _mm_shufflehi_epi16(xmm2,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm2 = _mm_shuffle_epi32(xmm2,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm3 = _mm_shufflelo_epi16(xmm3,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm3 = _mm_shufflehi_epi16(xmm3,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm3 = _mm_shuffle_epi32(xmm3,0xd8); //_MM_SHUFFLE(0,2,1,3));

    ch_mag_int = _mm_unpacklo_epi64(xmm2,xmm3);

    // calculate optimal interference amplitudes
    interference_abs_epi16(psi_r_p1_p1 , ch_mag_int, a_r_p1_p1 , ONE_OVER_SQRT_10_Q15, THREE_OVER_SQRT_10);
    interference_abs_epi16(psi_i_p1_p1 , ch_mag_int, a_i_p1_p1 , ONE_OVER_SQRT_10_Q15, THREE_OVER_SQRT_10);
    interference_abs_epi16(psi_r_p1_m1 , ch_mag_int, a_r_p1_m1 , ONE_OVER_SQRT_10_Q15, THREE_OVER_SQRT_10);
    interference_abs_epi16(psi_i_p1_m1 , ch_mag_int, a_i_p1_m1 , ONE_OVER_SQRT_10_Q15, THREE_OVER_SQRT_10);
    interference_abs_epi16(psi_r_m1_p1 , ch_mag_int, a_r_m1_p1 , ONE_OVER_SQRT_10_Q15, THREE_OVER_SQRT_10);
    interference_abs_epi16(psi_i_m1_p1 , ch_mag_int, a_i_m1_p1 , ONE_OVER_SQRT_10_Q15, THREE_OVER_SQRT_10);
    interference_abs_epi16(psi_r_m1_m1 , ch_mag_int, a_r_m1_m1 , ONE_OVER_SQRT_10_Q15, THREE_OVER_SQRT_10);
    interference_abs_epi16(psi_i_m1_m1 , ch_mag_int, a_i_m1_m1 , ONE_OVER_SQRT_10_Q15, THREE_OVER_SQRT_10);

    // prodsum
    prodsum_psi_a_epi16(psi_r_p1_p1, a_r_p1_p1, psi_i_p1_p1, a_i_p1_p1, psi_a_p1_p1);
    prodsum_psi_a_epi16(psi_r_p1_m1, a_r_p1_m1, psi_i_p1_m1, a_i_p1_m1, psi_a_p1_m1);
    prodsum_psi_a_epi16(psi_r_m1_p1, a_r_m1_p1, psi_i_m1_p1, a_i_m1_p1, psi_a_m1_p1);
    prodsum_psi_a_epi16(psi_r_m1_m1, a_r_m1_m1, psi_i_m1_m1, a_i_m1_m1, psi_a_m1_m1);

    // squares
    square_a_epi16(a_r_p1_p1, a_i_p1_p1, ch_mag_int, SQRT_10_OVER_FOUR, a_sq_p1_p1);
    square_a_epi16(a_r_p1_m1, a_i_p1_m1, ch_mag_int, SQRT_10_OVER_FOUR, a_sq_p1_m1);
    square_a_epi16(a_r_m1_p1, a_i_m1_p1, ch_mag_int, SQRT_10_OVER_FOUR, a_sq_m1_p1);
    square_a_epi16(a_r_m1_m1, a_i_m1_m1, ch_mag_int, SQRT_10_OVER_FOUR, a_sq_m1_m1);

    // Computing Metrics
    xmm0 = _mm_subs_epi16(psi_a_p1_p1, a_sq_p1_p1);
    bit_met_p1_p1 = _mm_adds_epi16(xmm0, y0_p_1_1);

    xmm0 = _mm_subs_epi16(psi_a_p1_m1, a_sq_p1_m1);
    bit_met_p1_m1 = _mm_adds_epi16(xmm0, y0_m_1_1);

    xmm0 = _mm_subs_epi16(psi_a_m1_p1, a_sq_m1_p1);
    bit_met_m1_p1 = _mm_subs_epi16(xmm0, y0_m_1_1);

    xmm0 = _mm_subs_epi16(psi_a_m1_m1, a_sq_m1_m1);
    bit_met_m1_m1 = _mm_subs_epi16(xmm0, y0_p_1_1);

    // MSB
    logmax_num_re0 = _mm_max_epi16(bit_met_p1_p1,bit_met_p1_m1); // bit=0
    logmax_den_re0 = _mm_max_epi16(bit_met_m1_p1,bit_met_m1_m1); // bit=1

    y0r = _mm_subs_epi16(logmax_num_re0,logmax_den_re0);

    // LSB
    logmax_num_im0 = _mm_max_epi16(bit_met_p1_p1,bit_met_m1_p1); // bit=0
    logmax_den_im0 = _mm_max_epi16(bit_met_p1_m1,bit_met_m1_m1); // bit=1

    y0i = _mm_subs_epi16(logmax_num_im0,logmax_den_im0);

    stream0_128i_out[i] = _mm_unpacklo_epi16(y0r,y0i); // = [L1(1), L2(1), L1(2), L2(2)]

    if (i<((length>>1) - 1)) // false if only 2 REs remain
      stream0_128i_out[i+1] = _mm_unpackhi_epi16(y0r,y0i);

1508 1509 1510
#elif defined(__arm__)

#endif
1511 1512
  }

1513
#if defined(__x86_64__) || defined(__i386__)
1514 1515
  _mm_empty();
  _m_empty();
1516
#endif
1517 1518 1519
}

int dlsch_qpsk_64qam_llr(LTE_DL_FRAME_PARMS *frame_parms,
1520 1521 1522 1523 1524 1525 1526 1527
                         int32_t **rxdataF_comp,
                         int32_t **rxdataF_comp_i,
                         int32_t **dl_ch_mag_i, //|h_1|^2*(2/sqrt{10})
                         int32_t **rho_i,
                         int16_t *dlsch_llr,
                         uint8_t symbol,
                         uint8_t first_symbol_flag,
                         uint16_t nb_rb,
1528
                         uint16_t pbch_pss_sss_adjust,
1529
                         int16_t **llr16p)
1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574
{

  int16_t *rxF=(int16_t*)&rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rxF_i=(int16_t*)&rxdataF_comp_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *ch_mag_i = (int16_t*)&dl_ch_mag_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rho=(int16_t*)&rho_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *llr16;
  int len;
  uint8_t symbol_mod = (symbol >= (7-frame_parms->Ncp))? (symbol-(7-frame_parms->Ncp)) : symbol;

  if (first_symbol_flag == 1) {
    llr16 = (int16_t*)dlsch_llr;
  } else {
    llr16 = (int16_t*)(*llr16p);
  }

  if (!llr16) {
    msg("dlsch_qpsk_qam64_llr: llr is null, symbol %d\n",symbol);
    return -1;
  }

  if ((symbol_mod==0) || (symbol_mod==(4-frame_parms->Ncp))) {
    // if symbol has pilots
    if (frame_parms->mode1_flag==0)
      // in 2 antenna ports we have 8 REs per symbol per RB
      len = (nb_rb*8) - (2*pbch_pss_sss_adjust/3);
    else
      // for 1 antenna port we have 10 REs per symbol per RB
      len = (nb_rb*10) - (5*pbch_pss_sss_adjust/6);
  } else {
    // symbol has no pilots
    len = (nb_rb*12) - pbch_pss_sss_adjust;
  }

  qpsk_qam64((short *)rxF,
             (short *)rxF_i,
             (short *)ch_mag_i,
             (short *)llr16,
             (short *)rho,
             len);

  llr16 += (len<<1);
  *llr16p = (short *)llr16;

  return(0);
1575
}
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/*
__m128i ONE_OVER_SQRT_2_42 __attribute__((aligned(16)));
__m128i THREE_OVER_SQRT_2_42 __attribute__((aligned(16)));
__m128i FIVE_OVER_SQRT_2_42 __attribute__((aligned(16)));
__m128i SEVEN_OVER_SQRT_2_42 __attribute__((aligned(16)));

__m128i ch_mag_int_with_sigma2 __attribute__((aligned(16)));
__m128i two_ch_mag_int_with_sigma2 __attribute__((aligned(16)));
__m128i three_ch_mag_int_with_sigma2 __attribute__((aligned(16)));
__m128i SQRT_42_OVER_FOUR __attribute__((aligned(16)));
*/
1587
void qpsk_qam64(short *stream0_in,
1588
                short *stream1_in,
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                short *ch_mag_i,
                short *stream0_out,
                short *rho01,
                int length
1593
		)
1594 1595 1596
{

  /*
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    This function computes the LLRs of stream 0 (s_0) in presence of the interfering stream 1 (s_1) assuming that both symbols are QPSK. It can be used for both MU-MIMO interference-aware receiver or for SU-MIMO receivers.

    Parameters:
    stream0_in = Matched filter output y0' = (h0*g0)*y0
    stream1_in = Matched filter output y1' = (h0*g1)*y0
    stream0_out = LLRs
    rho01 = Correlation between the two effective channels \rho_{10} = (h1*g1)*(h0*g0)
    length = number of resource elements
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  */

1607
#if defined(__x86_64__) || defined(__i386__)
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  __m128i *rho01_128i = (__m128i *)rho01;
  __m128i *stream0_128i_in = (__m128i *)stream0_in;
  __m128i *stream1_128i_in = (__m128i *)stream1_in;
  __m128i *stream0_128i_out = (__m128i *)stream0_out;
  __m128i *ch_mag_128i_i    = (__m128i *)ch_mag_i;
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  __m128i ONE_OVER_SQRT_2 = _mm_set1_epi16(23170); // round(1/sqrt(2)*2^15)
  __m128i ONE_OVER_SQRT_2_42 = _mm_set1_epi16(3575); // round(1/sqrt(2*42)*2^15)
  __m128i THREE_OVER_SQRT_2_42 = _mm_set1_epi16(10726); // round(3/sqrt(2*42)*2^15)
  __m128i FIVE_OVER_SQRT_2_42 = _mm_set1_epi16(17876); // round(5/sqrt(2*42)*2^15)
  __m128i SEVEN_OVER_SQRT_2_42 = _mm_set1_epi16(25027); // round(7/sqrt(2*42)*2^15)
  __m128i SQRT_42_OVER_FOUR = _mm_set1_epi16(13272); // round(sqrt(42)/4*2^13), Q3.1
  __m128i ch_mag_int;
  __m128i ch_mag_int_with_sigma2;
  __m128i two_ch_mag_int_with_sigma2;
  __m128i three_ch_mag_int_with_sigma2;
#elif defined(__arm__)

#endif
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#ifdef DEBUG_LLR
1628
  print_shorts2("rho01_128i:\n",rho01_128i);
1629 1630
#endif

1631 1632 1633 1634 1635 1636
  int i;


  for (i=0; i<length>>2; i+=2) {
    // in each iteration, we take 8 complex samples

1637 1638
#if defined(__x86_64__) || defined(__i386__)

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    xmm0 = rho01_128i[i]; // 4 symbols
    xmm1 = rho01_128i[i+1];

    // put (rho_r + rho_i)/sqrt2 in rho_rpi
    // put (rho_r - rho_i)/sqrt2 in rho_rmi
    xmm0 = _mm_shufflelo_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shufflehi_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shuffle_epi32(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflelo_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflehi_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shuffle_epi32(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    //xmm0 = [Re(0,1) Re(2,3) Im(0,1) Im(2,3)]
    //xmm1 = [Re(4,5) Re(6,7) Im(4,5) Im(6,7)]
    xmm2 = _mm_unpacklo_epi64(xmm0,xmm1); // Re(rho)
    xmm3 = _mm_unpackhi_epi64(xmm0,xmm1); // Im(rho)
    rho_rpi = _mm_adds_epi16(xmm2,xmm3); // rho = Re(rho) + Im(rho)
    rho_rmi = _mm_subs_epi16(xmm2,xmm3); // rho* = Re(rho) - Im(rho)

    // divide by sqrt(2)
    rho_rpi = _mm_mulhi_epi16(rho_rpi, ONE_OVER_SQRT_2);
    rho_rmi = _mm_mulhi_epi16(rho_rmi, ONE_OVER_SQRT_2);
    rho_rpi = _mm_slli_epi16(rho_rpi,1);
    rho_rmi = _mm_slli_epi16(rho_rmi,1);

    // Compute LLR for first bit of stream 0

    // Compute real and imaginary parts of MF output for stream 0
    xmm0 = stream0_128i_in[i];
    xmm1 = stream0_128i_in[i+1];

    xmm0 = _mm_shufflelo_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shufflehi_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shuffle_epi32(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflelo_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflehi_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shuffle_epi32(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    //xmm0 = [Re(0,1) Re(2,3) Im(0,1) Im(2,3)]
    //xmm1 = [Re(4,5) Re(6,7) Im(4,5) Im(6,7)]
    y0r = _mm_unpacklo_epi64(xmm0,xmm1); // = [y0r(1),y0r(2),y0r(3),y0r(4)]
    y0i = _mm_unpackhi_epi64(xmm0,xmm1);

    // divide by sqrt(2)
    y0r_over2 = _mm_mulhi_epi16(y0r, ONE_OVER_SQRT_2);
    y0i_over2 = _mm_mulhi_epi16(y0i, ONE_OVER_SQRT_2);
    y0r_over2  = _mm_slli_epi16(y0r,1);
    y0i_over2  = _mm_slli_epi16(y0i,1);

    y0_p_1_1 = _mm_adds_epi16(y0r_over2, y0i_over2);
    y0_m_1_1 = _mm_subs_epi16(y0r_over2, y0i_over2);

    // Compute real and imaginary parts of MF output for stream 1
    xmm0 = stream1_128i_in[i];
    xmm1 = stream1_128i_in[i+1];

    xmm0 = _mm_shufflelo_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shufflehi_epi16(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm0 = _mm_shuffle_epi32(xmm0,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflelo_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shufflehi_epi16(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm1 = _mm_shuffle_epi32(xmm1,0xd8); //_MM_SHUFFLE(0,2,1,3));
    //xmm0 = [Re(0,1) Re(2,3) Im(0,1) Im(2,3)]
    //xmm1 = [Re(4,5) Re(6,7) Im(4,5) Im(6,7)]
    y1r = _mm_unpacklo_epi64(xmm0,xmm1); //[y1r(1),y1r(2),y1r(3),y1r(4)]
    y1i = _mm_unpackhi_epi64(xmm0,xmm1); //[y1i(1),y1i(2),y1i(3),y1i(4)]

    xmm0 = _mm_setzero_si128(); // ZERO

    // compute psi
    xmm3 = _mm_subs_epi16(y1r,rho_rpi);
    psi_r_p1_p1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_subs_epi16(y1i,rho_rmi);
    psi_i_p1_p1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_subs_epi16(y1r,rho_rmi);
    psi_r_p1_m1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_adds_epi16(y1i,rho_rpi);
    psi_i_p1_m1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_adds_epi16(y1r,rho_rmi);
    psi_r_m1_p1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_subs_epi16(y1i,rho_rpi);
    psi_i_m1_p1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_adds_epi16(y1r,rho_rpi);
    psi_r_m1_m1 = _mm_abs_epi16(xmm3);
    xmm3 = _mm_adds_epi16(y1i,rho_rmi);
    psi_i_m1_m1 = _mm_abs_epi16(xmm3);

    // Rearrange interfering channel magnitudes
    xmm2 = ch_mag_128i_i[i];
    xmm3 = ch_mag_128i_i[i+1];

    xmm2 = _mm_shufflelo_epi16(xmm2,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm2 = _mm_shufflehi_epi16(xmm2,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm2 = _mm_shuffle_epi32(xmm2,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm3 = _mm_shufflelo_epi16(xmm3,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm3 = _mm_shufflehi_epi16(xmm3,0xd8); //_MM_SHUFFLE(0,2,1,3));
    xmm3 = _mm_shuffle_epi32(xmm3,0xd8); //_MM_SHUFFLE(0,2,1,3));

    ch_mag_int = _mm_unpacklo_epi64(xmm2,xmm3);
    ch_mag_int_with_sigma2       = _mm_srai_epi16(ch_mag_int, 1); // *2
    two_ch_mag_int_with_sigma2   = ch_mag_int; // *4
    three_ch_mag_int_with_sigma2 = _mm_adds_epi16(ch_mag_int_with_sigma2, two_ch_mag_int_with_sigma2); // *6

    interference_abs_64qam_epi16(psi_r_p1_p1, ch_mag_int_with_sigma2, two_ch_mag_int_with_sigma2, three_ch_mag_int_with_sigma2, a_r_p1_p1, ONE_OVER_SQRT_2_42, THREE_OVER_SQRT_2_42, FIVE_OVER_SQRT_2_42,
                                 SEVEN_OVER_SQRT_2_42);
    interference_abs_64qam_epi16(psi_i_p1_p1, ch_mag_int_with_sigma2, two_ch_mag_int_with_sigma2, three_ch_mag_int_with_sigma2, a_i_p1_p1, ONE_OVER_SQRT_2_42, THREE_OVER_SQRT_2_42, FIVE_OVER_SQRT_2_42,
                                 SEVEN_OVER_SQRT_2_42);
    interference_abs_64qam_epi16(psi_r_p1_m1, ch_mag_int_with_sigma2, two_ch_mag_int_with_sigma2, three_ch_mag_int_with_sigma2, a_r_p1_m1, ONE_OVER_SQRT_2_42, THREE_OVER_SQRT_2_42, FIVE_OVER_SQRT_2_42,
                                 SEVEN_OVER_SQRT_2_42);
    interference_abs_64qam_epi16(psi_i_p1_m1, ch_mag_int_with_sigma2, two_ch_mag_int_with_sigma2, three_ch_mag_int_with_sigma2, a_i_p1_m1, ONE_OVER_SQRT_2_42, THREE_OVER_SQRT_2_42, FIVE_OVER_SQRT_2_42,
                                 SEVEN_OVER_SQRT_2_42);
    interference_abs_64qam_epi16(psi_r_m1_p1, ch_mag_int_with_sigma2, two_ch_mag_int_with_sigma2, three_ch_mag_int_with_sigma2, a_r_m1_p1, ONE_OVER_SQRT_2_42, THREE_OVER_SQRT_2_42, FIVE_OVER_SQRT_2_42,
                                 SEVEN_OVER_SQRT_2_42);
    interference_abs_64qam_epi16(psi_i_m1_p1, ch_mag_int_with_sigma2, two_ch_mag_int_with_sigma2, three_ch_mag_int_with_sigma2, a_i_m1_p1, ONE_OVER_SQRT_2_42, THREE_OVER_SQRT_2_42, FIVE_OVER_SQRT_2_42,
                                 SEVEN_OVER_SQRT_2_42);
    interference_abs_64qam_epi16(psi_r_m1_m1, ch_mag_int_with_sigma2, two_ch_mag_int_with_sigma2, three_ch_mag_int_with_sigma2, a_r_m1_m1, ONE_OVER_SQRT_2_42, THREE_OVER_SQRT_2_42, FIVE_OVER_SQRT_2_42,
                                 SEVEN_OVER_SQRT_2_42);
    interference_abs_64qam_epi16(psi_i_m1_m1, ch_mag_int_with_sigma2, two_ch_mag_int_with_sigma2, three_ch_mag_int_with_sigma2, a_i_m1_m1, ONE_OVER_SQRT_2_42, THREE_OVER_SQRT_2_42, FIVE_OVER_SQRT_2_42,
                                 SEVEN_OVER_SQRT_2_42);

    // prodsum
    prodsum_psi_a_epi16(psi_r_p1_p1, a_r_p1_p1, psi_i_p1_p1, a_i_p1_p1, psi_a_p1_p1);
    prodsum_psi_a_epi16(psi_r_p1_m1, a_r_p1_m1, psi_i_p1_m1, a_i_p1_m1, psi_a_p1_m1);
    prodsum_psi_a_epi16(psi_r_m1_p1, a_r_m1_p1, psi_i_m1_p1, a_i_m1_p1, psi_a_m1_p1);
    prodsum_psi_a_epi16(psi_r_m1_m1, a_r_m1_m1, psi_i_m1_m1, a_i_m1_m1, psi_a_m1_m1);

    // Multiply by sqrt(2)
    psi_a_p1_p1 = _mm_mulhi_epi16(psi_a_p1_p1, ONE_OVER_SQRT_2);
    psi_a_p1_p1 = _mm_slli_epi16(psi_a_p1_p1, 2);
    psi_a_p1_m1 = _mm_mulhi_epi16(psi_a_p1_m1, ONE_OVER_SQRT_2);
    psi_a_p1_m1 = _mm_slli_epi16(psi_a_p1_m1, 2);
    psi_a_m1_p1 = _mm_mulhi_epi16(psi_a_m1_p1, ONE_OVER_SQRT_2);
    psi_a_m1_p1 = _mm_slli_epi16(psi_a_m1_p1, 2);
    psi_a_m1_m1 = _mm_mulhi_epi16(psi_a_m1_m1, ONE_OVER_SQRT_2);
    psi_a_m1_m1 = _mm_slli_epi16(psi_a_m1_m1, 2);

    square_a_64qam_epi16(a_r_p1_p1, a_i_p1_p1, ch_mag_int, SQRT_42_OVER_FOUR, a_sq_p1_p1);
    square_a_64qam_epi16(a_r_p1_m1, a_i_p1_m1, ch_mag_int, SQRT_42_OVER_FOUR, a_sq_p1_m1);
    square_a_64qam_epi16(a_r_m1_p1, a_i_m1_p1, ch_mag_int, SQRT_42_OVER_FOUR, a_sq_m1_p1);
    square_a_64qam_epi16(a_r_m1_m1, a_i_m1_m1, ch_mag_int, SQRT_42_OVER_FOUR, a_sq_m1_m1);

    // Computing Metrics
    xmm0 = _mm_subs_epi16(psi_a_p1_p1, a_sq_p1_p1);
    bit_met_p1_p1 = _mm_adds_epi16(xmm0, y0_p_1_1);

    xmm0 = _mm_subs_epi16(psi_a_p1_m1, a_sq_p1_m1);
    bit_met_p1_m1 = _mm_adds_epi16(xmm0, y0_m_1_1);

    xmm0 = _mm_subs_epi16(psi_a_m1_p1, a_sq_m1_p1);
    bit_met_m1_p1 = _mm_subs_epi16(xmm0, y0_m_1_1);

    xmm0 = _mm_subs_epi16(psi_a_m1_m1, a_sq_m1_m1);
    bit_met_m1_m1 = _mm_subs_epi16(xmm0, y0_p_1_1);

    // MSB
    logmax_num_re0 = _mm_max_epi16(bit_met_p1_p1,bit_met_p1_m1); // bit=0
    logmax_den_re0 = _mm_max_epi16(bit_met_m1_p1,bit_met_m1_m1); // bit=1

    y0r = _mm_subs_epi16(logmax_num_re0,logmax_den_re0);

    // LSB
    logmax_num_im0 = _mm_max_epi16(bit_met_p1_p1,bit_met_m1_p1); // bit=0
    logmax_den_im0 = _mm_max_epi16(bit_met_p1_m1,bit_met_m1_m1); // bit=1

    y0i = _mm_subs_epi16(logmax_num_im0,logmax_den_im0);

    stream0_128i_out[i] = _mm_unpacklo_epi16(y0r,y0i); // = [L1(1), L2(1), L1(2), L2(2)]

    if (i<((length>>1) - 1)) // false if only 2 REs remain
      stream0_128i_out[i+1] = _mm_unpackhi_epi16(y0r,y0i);

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#elif defined(__arm__)

#endif
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  }

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#if defined(__x86_64__) || defined(__i386__)
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  _mm_empty();
  _m_empty();
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#endif
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}


//----------------------------------------------------------------------------------------------
// 16-QAM
//----------------------------------------------------------------------------------------------

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/*
__m128i ONE_OVER_TWO_SQRT_10 __attribute__((aligned(16)));
__m128i NINE_OVER_TWO_SQRT_10 __attribute__((aligned(16)));
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__m128i  y0r_over_sqrt10 __attribute__ ((aligned(16)));
__m128i  y0i_over_sqrt10 __attribute__ ((aligned(16)));
__m128i  y0r_three_over_sqrt10 __attribute__ ((aligned(16)));
__m128i  y0i_three_over_sqrt10 __attribute__ ((aligned(16)));
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__m128i ch_mag_des __attribute__((aligned(16)));
__m128i ch_mag_over_10 __attribute__ ((aligned(16)));
__m128i ch_mag_over_2 __attribute__ ((aligned(16)));
__m128i ch_mag_9_over_10 __attribute__ ((aligned(16)));
*/
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void qam16_qpsk(short *stream0_in,
                short *stream1_in,
                short *ch_mag,
                short *stream0_out,
                short *rho01,
                int length
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		)
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{

  /*
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    Author: Sebastian Wagner
    Date: 2012-06-04

    Input:
    stream0_in:  MF filter for 1st stream, i.e., y0=h0'*y
    stream!_in:  MF filter for 2nd stream, i.e., y1=h1'*y
    ch_mag:      2*h0/sqrt(00), [Re0 Im0 Re1 Im1] s.t. Im0=Re0, Im1=Re1, etc
    ch_mag_i:    2*h1/sqrt(00), [Re0 Im0 Re1 Im1] s.t. Im0=Re0, Im1=Re1, etc
    rho01:       Channel cross correlation, i.e., h1'*h0

    Output:
    stream0_out: output LLRs for 1st stream
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  */

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#if defined(__x86_64__) || defined(__i386__)
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  __m128i *rho01_128i       = (__m128i *)rho01;
  __m128i *stream0_128i_in  = (__m128i *)stream0_in;
  __m128i *stream1_128i_in  = (__m128i *)stream1_in;
  __m128i *stream0_128i_out = (__m128i *)stream0_out;
  __m128i *ch_mag_128i      = (__m128i *)ch_mag;
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  __m128i ONE_OVER_SQRT_2 = _mm_set1_epi16(23170); // round(1/sqrt(2)*2^15)
  __m128i ONE_OVER_SQRT_10 = _mm_set1_epi16(20724); // round(1/sqrt(10)*2^16)
  __m128i THREE_OVER_SQRT_10 = _mm_set1_epi16(31086); // round(3/sqrt(10)*2^15)
  __m128i SQRT_10_OVER_FOUR = _mm_set1_epi16(25905); // round(sqrt(10)/4*2^15)
  __m128i ONE_OVER_TWO_SQRT_10 = _mm_set1_epi16(10362); // round(1/2/sqrt(10)*2^16)
  __m128i NINE_OVER_TWO_SQRT_10 = _mm_set1_epi16(23315); // round(9/2/sqrt(10)*2^14)
  __m128i  y0r_over_sqrt10;
  __m128i  y0i_over_sqrt10;
  __m128i  y0r_three_over_sqrt10;
  __m128i  y0i_three_over_sqrt10;
  
  __m128i ch_mag_des;
  __m128i ch_mag_over_10;
  __m128i ch_mag_over_2;
  __m128i ch_mag_9_over_10;
#elif defined(__arm__)

#endif
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  int i;


  for (i=0; i<length>>2; i+=2) {
    // In one iteration, we deal with 8 REs

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#if defined(__x86_64__) || defined(__i386__)
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