volk_8ic_x2_multiply_conjugate_16ic.h

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/* -*- c++ -*- */
/*
 * Copyright 2012, 2014 Free Software Foundation, Inc.
 *
 * This file is part of VOLK
 *
 * SPDX-License-Identifier: LGPL-3.0-or-later
 */
 
#ifndef INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_a_H
#define INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_a_H
 
#include <inttypes.h>
#include <stdio.h>
#include <volk/volk_complex.h>
 
#ifdef LV_HAVE_AVX2
#include <immintrin.h>
static inline void volk_8ic_x2_multiply_conjugate_16ic_a_avx2(lv_16sc_t* cVector,
                                                              const lv_8sc_t* aVector,
                                                              const lv_8sc_t* bVector,
                                                              unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int quarterPoints = num_points / 8;
 
    __m256i x, y, realz, imagz;
    lv_16sc_t* c = cVector;
    const lv_8sc_t* a = aVector;
    const lv_8sc_t* b = bVector;
    __m256i conjugateSign =
        _mm256_set_epi16(-1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1);
 
    for (; number < quarterPoints; number++) {
        // Convert 8 bit values into 16 bit values
        x = _mm256_cvtepi8_epi16(_mm_load_si128((__m128i*)a));
        y = _mm256_cvtepi8_epi16(_mm_load_si128((__m128i*)b));
 
        // Calculate the ar*cr - ai*(-ci) portions
        realz = _mm256_madd_epi16(x, y);
 
        // Calculate the complex conjugate of the cr + ci j values
        y = _mm256_sign_epi16(y, conjugateSign);
 
        // Shift the order of the cr and ci values
        y = _mm256_shufflehi_epi16(_mm256_shufflelo_epi16(y, _MM_SHUFFLE(2, 3, 0, 1)),
                                   _MM_SHUFFLE(2, 3, 0, 1));
 
        // Calculate the ar*(-ci) + cr*(ai)
        imagz = _mm256_madd_epi16(x, y);
 
        // Perform the addition of products
 
        _mm256_store_si256((__m256i*)c,
                           _mm256_packs_epi32(_mm256_unpacklo_epi32(realz, imagz),
                                              _mm256_unpackhi_epi32(realz, imagz)));
 
        a += 8;
        b += 8;
        c += 8;
    }
 
    number = quarterPoints * 8;
    int16_t* c16Ptr = (int16_t*)&cVector[number];
    int8_t* a8Ptr = (int8_t*)&aVector[number];
    int8_t* b8Ptr = (int8_t*)&bVector[number];
    for (; number < num_points; number++) {
        float aReal = (float)*a8Ptr++;
        float aImag = (float)*a8Ptr++;
        lv_32fc_t aVal = lv_cmake(aReal, aImag);
        float bReal = (float)*b8Ptr++;
        float bImag = (float)*b8Ptr++;
        lv_32fc_t bVal = lv_cmake(bReal, -bImag);
        lv_32fc_t temp = aVal * bVal;
 
        *c16Ptr++ = (int16_t)lv_creal(temp);
        *c16Ptr++ = (int16_t)lv_cimag(temp);
    }
}
#endif /* LV_HAVE_AVX2 */
 
 
#ifdef LV_HAVE_SSE4_1
#include <smmintrin.h>
static inline void volk_8ic_x2_multiply_conjugate_16ic_a_sse4_1(lv_16sc_t* cVector,
                                                                const lv_8sc_t* aVector,
                                                                const lv_8sc_t* bVector,
                                                                unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int quarterPoints = num_points / 4;
 
    __m128i x, y, realz, imagz;
    lv_16sc_t* c = cVector;
    const lv_8sc_t* a = aVector;
    const lv_8sc_t* b = bVector;
    __m128i conjugateSign = _mm_set_epi16(-1, 1, -1, 1, -1, 1, -1, 1);
 
    for (; number < quarterPoints; number++) {
        // Convert into 8 bit values into 16 bit values
        x = _mm_cvtepi8_epi16(_mm_loadl_epi64((__m128i*)a));
        y = _mm_cvtepi8_epi16(_mm_loadl_epi64((__m128i*)b));
 
        // Calculate the ar*cr - ai*(-ci) portions
        realz = _mm_madd_epi16(x, y);
 
        // Calculate the complex conjugate of the cr + ci j values
        y = _mm_sign_epi16(y, conjugateSign);
 
        // Shift the order of the cr and ci values
        y = _mm_shufflehi_epi16(_mm_shufflelo_epi16(y, _MM_SHUFFLE(2, 3, 0, 1)),
                                _MM_SHUFFLE(2, 3, 0, 1));
 
        // Calculate the ar*(-ci) + cr*(ai)
        imagz = _mm_madd_epi16(x, y);
 
        _mm_store_si128((__m128i*)c,
                        _mm_packs_epi32(_mm_unpacklo_epi32(realz, imagz),
                                        _mm_unpackhi_epi32(realz, imagz)));
 
        a += 4;
        b += 4;
        c += 4;
    }
 
    number = quarterPoints * 4;
    int16_t* c16Ptr = (int16_t*)&cVector[number];
    int8_t* a8Ptr = (int8_t*)&aVector[number];
    int8_t* b8Ptr = (int8_t*)&bVector[number];
    for (; number < num_points; number++) {
        float aReal = (float)*a8Ptr++;
        float aImag = (float)*a8Ptr++;
        lv_32fc_t aVal = lv_cmake(aReal, aImag);
        float bReal = (float)*b8Ptr++;
        float bImag = (float)*b8Ptr++;
        lv_32fc_t bVal = lv_cmake(bReal, -bImag);
        lv_32fc_t temp = aVal * bVal;
 
        *c16Ptr++ = (int16_t)lv_creal(temp);
        *c16Ptr++ = (int16_t)lv_cimag(temp);
    }
}
#endif /* LV_HAVE_SSE4_1 */
 
#ifdef LV_HAVE_GENERIC
static inline void volk_8ic_x2_multiply_conjugate_16ic_generic(lv_16sc_t* cVector,
                                                               const lv_8sc_t* aVector,
                                                               const lv_8sc_t* bVector,
                                                               unsigned int num_points)
{
    unsigned int number = 0;
    int16_t* c16Ptr = (int16_t*)cVector;
    int8_t* a8Ptr = (int8_t*)aVector;
    int8_t* b8Ptr = (int8_t*)bVector;
    for (number = 0; number < num_points; number++) {
        float aReal = (float)*a8Ptr++;
        float aImag = (float)*a8Ptr++;
        lv_32fc_t aVal = lv_cmake(aReal, aImag);
        float bReal = (float)*b8Ptr++;
        float bImag = (float)*b8Ptr++;
        lv_32fc_t bVal = lv_cmake(bReal, -bImag);
        lv_32fc_t temp = aVal * bVal;
 
        *c16Ptr++ = (int16_t)lv_creal(temp);
        *c16Ptr++ = (int16_t)lv_cimag(temp);
    }
}
#endif /* LV_HAVE_GENERIC */
 
#endif /* INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_a_H */
 
#ifndef INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_u_H
#define INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_u_H
 
#include <inttypes.h>
#include <stdio.h>
#include <volk/volk_complex.h>
 
#ifdef LV_HAVE_AVX2
#include <immintrin.h>
static inline void volk_8ic_x2_multiply_conjugate_16ic_u_avx2(lv_16sc_t* cVector,
                                                              const lv_8sc_t* aVector,
                                                              const lv_8sc_t* bVector,
                                                              unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int oneEigthPoints = num_points / 8;
 
    __m256i x, y, realz, imagz;
    lv_16sc_t* c = cVector;
    const lv_8sc_t* a = aVector;
    const lv_8sc_t* b = bVector;
    __m256i conjugateSign =
        _mm256_set_epi16(-1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1);
 
    for (; number < oneEigthPoints; number++) {
        // Convert 8 bit values into 16 bit values
        x = _mm256_cvtepi8_epi16(_mm_loadu_si128((__m128i*)a));
        y = _mm256_cvtepi8_epi16(_mm_loadu_si128((__m128i*)b));
 
        // Calculate the ar*cr - ai*(-ci) portions
        realz = _mm256_madd_epi16(x, y);
 
        // Calculate the complex conjugate of the cr + ci j values
        y = _mm256_sign_epi16(y, conjugateSign);
 
        // Shift the order of the cr and ci values
        y = _mm256_shufflehi_epi16(_mm256_shufflelo_epi16(y, _MM_SHUFFLE(2, 3, 0, 1)),
                                   _MM_SHUFFLE(2, 3, 0, 1));
 
        // Calculate the ar*(-ci) + cr*(ai)
        imagz = _mm256_madd_epi16(x, y);
 
        // Perform the addition of products
 
        _mm256_storeu_si256((__m256i*)c,
                            _mm256_packs_epi32(_mm256_unpacklo_epi32(realz, imagz),
                                               _mm256_unpackhi_epi32(realz, imagz)));
 
        a += 8;
        b += 8;
        c += 8;
    }
 
    number = oneEigthPoints * 8;
    int16_t* c16Ptr = (int16_t*)&cVector[number];
    int8_t* a8Ptr = (int8_t*)&aVector[number];
    int8_t* b8Ptr = (int8_t*)&bVector[number];
    for (; number < num_points; number++) {
        float aReal = (float)*a8Ptr++;
        float aImag = (float)*a8Ptr++;
        lv_32fc_t aVal = lv_cmake(aReal, aImag);
        float bReal = (float)*b8Ptr++;
        float bImag = (float)*b8Ptr++;
        lv_32fc_t bVal = lv_cmake(bReal, -bImag);
        lv_32fc_t temp = aVal * bVal;
 
        *c16Ptr++ = (int16_t)lv_creal(temp);
        *c16Ptr++ = (int16_t)lv_cimag(temp);
    }
}
#endif /* LV_HAVE_AVX2 */
 
#endif /* INCLUDED_volk_8ic_x2_multiply_conjugate_16ic_u_H */