GNU Radio 3.6.5.1 C++ API
volk_32fc_s32fc_multiply_32fc_a.h
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1 #ifndef INCLUDED_volk_32fc_s32fc_multiply_32fc_a_H
2 #define INCLUDED_volk_32fc_s32fc_multiply_32fc_a_H
3 
4 #include <inttypes.h>
5 #include <stdio.h>
6 #include <volk/volk_complex.h>
7 #include <float.h>
8 
9 #ifdef LV_HAVE_SSE3
10 #include <pmmintrin.h>
11  /*!
12  \brief Multiplies the two input complex vectors and stores their results in the third vector
13  \param cVector The vector where the results will be stored
14  \param aVector One of the vectors to be multiplied
15  \param bVector One of the vectors to be multiplied
16  \param num_points The number of complex values in aVector and bVector to be multiplied together and stored into cVector
17  */
18 static inline void volk_32fc_s32fc_multiply_32fc_a_sse3(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t scalar, unsigned int num_points){
19  unsigned int number = 0;
20  const unsigned int halfPoints = num_points / 2;
21 
22  __m128 x, yl, yh, z, tmp1, tmp2;
23  lv_32fc_t* c = cVector;
24  const lv_32fc_t* a = aVector;
25 
26  // Set up constant scalar vector
27  yl = _mm_set_ps1(lv_creal(scalar));
28  yh = _mm_set_ps1(lv_cimag(scalar));
29 
30  for(;number < halfPoints; number++){
31 
32  x = _mm_load_ps((float*)a); // Load the ar + ai, br + bi as ar,ai,br,bi
33 
34  tmp1 = _mm_mul_ps(x,yl); // tmp1 = ar*cr,ai*cr,br*dr,bi*dr
35 
36  x = _mm_shuffle_ps(x,x,0xB1); // Re-arrange x to be ai,ar,bi,br
37 
38  tmp2 = _mm_mul_ps(x,yh); // tmp2 = ai*ci,ar*ci,bi*di,br*di
39 
40  z = _mm_addsub_ps(tmp1,tmp2); // ar*cr-ai*ci, ai*cr+ar*ci, br*dr-bi*di, bi*dr+br*di
41 
42  _mm_store_ps((float*)c,z); // Store the results back into the C container
43 
44  a += 2;
45  c += 2;
46  }
47 
48  if((num_points % 2) != 0) {
49  *c = (*a) * scalar;
50  }
51 }
52 #endif /* LV_HAVE_SSE */
53 
54 
55 #ifdef LV_HAVE_GENERIC
56  /*!
57  \brief Multiplies the two input complex vectors and stores their results in the third vector
58  \param cVector The vector where the results will be stored
59  \param aVector One of the vectors to be multiplied
60  \param bVector One of the vectors to be multiplied
61  \param num_points The number of complex values in aVector and bVector to be multiplied together and stored into cVector
62  */
63 static inline void volk_32fc_s32fc_multiply_32fc_a_generic(lv_32fc_t* cVector, const lv_32fc_t* aVector, const lv_32fc_t scalar, unsigned int num_points){
64  lv_32fc_t* cPtr = cVector;
65  const lv_32fc_t* aPtr = aVector;
66  unsigned int number = num_points;
67 
68  // unwrap loop
69  while (number >= 8){
70  *cPtr++ = (*aPtr++) * scalar;
71  *cPtr++ = (*aPtr++) * scalar;
72  *cPtr++ = (*aPtr++) * scalar;
73  *cPtr++ = (*aPtr++) * scalar;
74  *cPtr++ = (*aPtr++) * scalar;
75  *cPtr++ = (*aPtr++) * scalar;
76  *cPtr++ = (*aPtr++) * scalar;
77  *cPtr++ = (*aPtr++) * scalar;
78  number -= 8;
79  }
80 
81  // clean up any remaining
82  while (number-- > 0)
83  *cPtr++ = *aPtr++ * scalar;
84 }
85 #endif /* LV_HAVE_GENERIC */
86 
87 
88 
89 
90 
91 #endif /* INCLUDED_volk_32fc_x2_multiply_32fc_a_H */