volk_32fc_x2_multiply_32fc.h

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#ifndef INCLUDED_volk_32fc_x2_multiply_32fc_u_H
#define INCLUDED_volk_32fc_x2_multiply_32fc_u_H

#include <inttypes.h>
#include <stdio.h>
#include <volk/volk_complex.h>
#include <float.h>

#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
  /*!
    \brief Multiplies the two input complex vectors and stores their results in the third vector
    \param cVector The vector where the results will be stored
    \param aVector One of the vectors to be multiplied
    \param bVector One of the vectors to be multiplied
    \param num_points The number of complex values in aVector and bVector to be multiplied together and stored into cVector
  */
static inline void volk_32fc_x2_multiply_32fc_u_sse3(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t* bVector, unsigned int num_points){
  unsigned int number = 0;
    const unsigned int halfPoints = num_points / 2;

    __m128 x, y, yl, yh, z, tmp1, tmp2;
    lv_32fc_t* c = cVector;
    const lv_32fc_t* a = aVector;
    const lv_32fc_t* b = bVector;

    for(;number < halfPoints; number++){

      x = _mm_loadu_ps((float*)a); // Load the ar + ai, br + bi as ar,ai,br,bi
      y = _mm_loadu_ps((float*)b); // Load the cr + ci, dr + di as cr,ci,dr,di

      yl = _mm_moveldup_ps(y); // Load yl with cr,cr,dr,dr
      yh = _mm_movehdup_ps(y); // Load yh with ci,ci,di,di

      tmp1 = _mm_mul_ps(x,yl); // tmp1 = ar*cr,ai*cr,br*dr,bi*dr

      x = _mm_shuffle_ps(x,x,0xB1); // Re-arrange x to be ai,ar,bi,br

      tmp2 = _mm_mul_ps(x,yh); // tmp2 = ai*ci,ar*ci,bi*di,br*di

      z = _mm_addsub_ps(tmp1,tmp2); // ar*cr-ai*ci, ai*cr+ar*ci, br*dr-bi*di, bi*dr+br*di

      _mm_storeu_ps((float*)c,z); // Store the results back into the C container

      a += 2;
      b += 2;
      c += 2;
    }

    if((num_points % 2) != 0) {
      *c = (*a) * (*b);
    }
}
#endif /* LV_HAVE_SSE */

#ifdef LV_HAVE_GENERIC
  /*!
    \brief Multiplies the two input complex vectors and stores their results in the third vector
    \param cVector The vector where the results will be stored
    \param aVector One of the vectors to be multiplied
    \param bVector One of the vectors to be multiplied
    \param num_points The number of complex values in aVector and bVector to be multiplied together and stored into cVector
  */
static inline void volk_32fc_x2_multiply_32fc_generic(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t* bVector, unsigned int num_points){
    lv_32fc_t* cPtr = cVector;
    const lv_32fc_t* aPtr = aVector;
    const lv_32fc_t* bPtr=  bVector;
    unsigned int number = 0;

    for(number = 0; number < num_points; number++){
      *cPtr++ = (*aPtr++) * (*bPtr++);
    }
}
#endif /* LV_HAVE_GENERIC */


#endif /* INCLUDED_volk_32fc_x2_multiply_32fc_u_H */
#ifndef INCLUDED_volk_32fc_x2_multiply_32fc_a_H
#define INCLUDED_volk_32fc_x2_multiply_32fc_a_H

#include <inttypes.h>
#include <stdio.h>
#include <volk/volk_complex.h>
#include <float.h>

#ifdef LV_HAVE_SSE3
#include <pmmintrin.h>
  /*!
    \brief Multiplies the two input complex vectors and stores their results in the third vector
    \param cVector The vector where the results will be stored
    \param aVector One of the vectors to be multiplied
    \param bVector One of the vectors to be multiplied
    \param num_points The number of complex values in aVector and bVector to be multiplied together and stored into cVector
  */
static inline void volk_32fc_x2_multiply_32fc_a_sse3(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t* bVector, unsigned int num_points){
  unsigned int number = 0;
    const unsigned int halfPoints = num_points / 2;

    __m128 x, y, yl, yh, z, tmp1, tmp2;
    lv_32fc_t* c = cVector;
    const lv_32fc_t* a = aVector;
    const lv_32fc_t* b = bVector;
    for(;number < halfPoints; number++){

      x = _mm_load_ps((float*)a); // Load the ar + ai, br + bi as ar,ai,br,bi
      y = _mm_load_ps((float*)b); // Load the cr + ci, dr + di as cr,ci,dr,di

      yl = _mm_moveldup_ps(y); // Load yl with cr,cr,dr,dr
      yh = _mm_movehdup_ps(y); // Load yh with ci,ci,di,di

      tmp1 = _mm_mul_ps(x,yl); // tmp1 = ar*cr,ai*cr,br*dr,bi*dr

      x = _mm_shuffle_ps(x,x,0xB1); // Re-arrange x to be ai,ar,bi,br

      tmp2 = _mm_mul_ps(x,yh); // tmp2 = ai*ci,ar*ci,bi*di,br*di

      z = _mm_addsub_ps(tmp1,tmp2); // ar*cr-ai*ci, ai*cr+ar*ci, br*dr-bi*di, bi*dr+br*di

      _mm_store_ps((float*)c,z); // Store the results back into the C container

      a += 2;
      b += 2;
      c += 2;
    }

    if((num_points % 2) != 0) {
      *c = (*a) * (*b);
    }
}
#endif /* LV_HAVE_SSE */

#ifdef LV_HAVE_GENERIC
  /*!
    \brief Multiplies the two input complex vectors and stores their results in the third vector
    \param cVector The vector where the results will be stored
    \param aVector One of the vectors to be multiplied
    \param bVector One of the vectors to be multiplied
    \param num_points The number of complex values in aVector and bVector to be multiplied together and stored into cVector
  */
static inline void volk_32fc_x2_multiply_32fc_a_generic(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t* bVector, unsigned int num_points){
    lv_32fc_t* cPtr = cVector;
    const lv_32fc_t* aPtr = aVector;
    const lv_32fc_t* bPtr=  bVector;
    unsigned int number = 0;

    for(number = 0; number < num_points; number++){
      *cPtr++ = (*aPtr++) * (*bPtr++);
    }
}
#endif /* LV_HAVE_GENERIC */

#ifdef LV_HAVE_NEON
#include <arm_neon.h>

  /*!
    \brief Multiplies the two input complex vectors and stores their results in the third vector
    \param cVector The vector where the results will be stored
    \param aVector One of the vectors to be multiplied
    \param bVector One of the vectors to be multiplied
    \param num_points The number of complex values in aVector and bVector to be multiplied together and stored into cVector
  */
static inline void volk_32fc_x2_multiply_32fc_neon(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t* bVector, unsigned int num_points){

    lv_32fc_t *a_ptr = (lv_32fc_t*) aVector;
    lv_32fc_t *b_ptr = (lv_32fc_t*) bVector;
    unsigned int quarter_points = num_points / 4;
    float32x4x2_t a_val, b_val, c_val;
    float32x4x2_t tmp_real, tmp_imag;
    unsigned int number = 0;

    for(number = 0; number < quarter_points; ++number) {
        a_val = vld2q_f32((float*)a_ptr); // a0r|a1r|a2r|a3r || a0i|a1i|a2i|a3i
        b_val = vld2q_f32((float*)b_ptr); // b0r|b1r|b2r|b3r || b0i|b1i|b2i|b3i
        __builtin_prefetch(a_ptr+4);
        __builtin_prefetch(b_ptr+4);

        // multiply the real*real and imag*imag to get real result
        // a0r*b0r|a1r*b1r|a2r*b2r|a3r*b3r
        tmp_real.val[0] = vmulq_f32(a_val.val[0], b_val.val[0]);
        // a0i*b0i|a1i*b1i|a2i*b2i|a3i*b3i
        tmp_real.val[1] = vmulq_f32(a_val.val[1], b_val.val[1]);

        // Multiply cross terms to get the imaginary result
        // a0r*b0i|a1r*b1i|a2r*b2i|a3r*b3i
        tmp_imag.val[0] = vmulq_f32(a_val.val[0], b_val.val[1]);
        // a0i*b0r|a1i*b1r|a2i*b2r|a3i*b3r
        tmp_imag.val[1] = vmulq_f32(a_val.val[1], b_val.val[0]);

        // store the results
        c_val.val[0] = vsubq_f32(tmp_real.val[0], tmp_real.val[1]);
        c_val.val[1] = vaddq_f32(tmp_imag.val[0], tmp_imag.val[1]);
        vst2q_f32((float*)cVector, c_val);

        a_ptr += 4;
        b_ptr += 4;
        cVector += 4;
    }

    for(number = quarter_points*4; number < num_points; number++){
      *cVector++ = (*a_ptr++) * (*b_ptr++);
    }

}
#endif /* LV_HAVE_NEON */

#ifdef LV_HAVE_NEON
  /*!
    \brief Multiplies the two input complex vectors and stores their results in the third vector
    \param cVector The vector where the results will be stored
    \param aVector One of the vectors to be multiplied
    \param bVector One of the vectors to be multiplied
    \param num_points The number of complex values in aVector and bVector to be multiplied together and stored into cVector
  */
static inline void volk_32fc_x2_multiply_32fc_neon_opttests(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t* bVector, unsigned int num_points){

    lv_32fc_t *a_ptr = (lv_32fc_t*) aVector;
    lv_32fc_t *b_ptr = (lv_32fc_t*) bVector;
    unsigned int quarter_points = num_points / 4;
    float32x4x2_t a_val, b_val;
    float32x4x2_t tmp_imag;
    unsigned int number = 0;

    for(number = 0; number < quarter_points; ++number) {
        a_val = vld2q_f32((float*)a_ptr); // a0r|a1r|a2r|a3r || a0i|a1i|a2i|a3i
        b_val = vld2q_f32((float*)b_ptr); // b0r|b1r|b2r|b3r || b0i|b1i|b2i|b3i
        __builtin_prefetch(a_ptr+4);
        __builtin_prefetch(b_ptr+4);

        // do the first multiply
        tmp_imag.val[1] = vmulq_f32(a_val.val[1], b_val.val[0]);
        tmp_imag.val[0] = vmulq_f32(a_val.val[0], b_val.val[0]);

        // use multiply accumulate/subtract to get result
        tmp_imag.val[1] = vmlaq_f32(tmp_imag.val[1], a_val.val[0], b_val.val[1]);
        tmp_imag.val[0] = vmlsq_f32(tmp_imag.val[0], a_val.val[1], b_val.val[1]);

        // store
        vst2q_f32((float*)cVector, tmp_imag);
        // increment pointers
        a_ptr += 4;
        b_ptr += 4;
        cVector += 4;
    }

    for(number = quarter_points*4; number < num_points; number++){
      *cVector++ = (*a_ptr++) * (*b_ptr++);
    }

}
#endif /* LV_HAVE_NEON */

#ifdef LV_HAVE_NEON
  /*!
    \brief Multiplies the two input complex vectors and stores their results in the third vector
    \param cVector The vector where the results will be stored
    \param aVector One of the vectors to be multiplied
    \param bVector One of the vectors to be multiplied
    \param num_points The number of complex values in aVector and bVector to be multiplied together and stored into cVector
  */
extern void volk_32fc_x2_multiply_32fc_neonasm(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t* bVector, unsigned int num_points);
#endif /* LV_HAVE_NEON */

#ifdef LV_HAVE_ORC
  /*!
    \brief Multiplies the two input complex vectors and stores their results in the third vector
    \param cVector The vector where the results will be stored
    \param aVector One of the vectors to be multiplied
    \param bVector One of the vectors to be multiplied
    \param num_points The number of complex values in aVector and bVector to be multiplied together and stored into cVector
  */
extern void volk_32fc_x2_multiply_32fc_a_orc_impl(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t* bVector, unsigned int num_points);
static inline void volk_32fc_x2_multiply_32fc_u_orc(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t* bVector, unsigned int num_points){
    volk_32fc_x2_multiply_32fc_a_orc_impl(cVector, aVector, bVector, num_points);
}
#endif /* LV_HAVE_ORC */





#endif /* INCLUDED_volk_32fc_x2_multiply_32fc_a_H */