Subversion Repositories testOled

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 mjames 1 
#include "ref.h"
2 
 
3 
void ref_cmplx_dot_prod_f32(
4 
  float32_t * pSrcA,
5 
  float32_t * pSrcB,
6 
  uint32_t numSamples,
7 
  float32_t * realResult,
8 
  float32_t * imagResult)
9 
{
10 
        float32_t sumr, sumi;
11 
        uint32_t i;
12 
 
13 
        sumr = 0;
14 
        sumi = 0;
15 
 
16 
        for(i=0;i<numSamples*2;i+=2)
17 
        {
18 
                sumr += pSrcA[i] * pSrcB[i]   - pSrcA[i+1] * pSrcB[i+1];
19 
                sumi += pSrcA[i] * pSrcB[i+1] + pSrcA[i+1] * pSrcB[i];
20 
        }
21 
 
22 
        *realResult = sumr;
23 
        *imagResult = sumi;
24 
}
25 
 
26 
void ref_cmplx_dot_prod_q31(
27 
  q31_t * pSrcA,
28 
  q31_t * pSrcB,
29 
  uint32_t numSamples,
30 
  q63_t * realResult,
31 
  q63_t * imagResult)
32 
{
33 
        q63_t sumr, sumi;
34 
        uint32_t i;
35 
 
36 
        sumr = 0;
37 
        sumi = 0;
38 
 
39 
        for(i=0;i<numSamples*2;i+=2)
40 
        {
41 
                //shifting down 14 here to provide guard bits
42 
                sumr += (((q63_t)pSrcA[i] * pSrcB[i]  ) >> 14) - (((q63_t)pSrcA[i+1] * pSrcB[i+1]) >> 14);
43 
                sumi += (((q63_t)pSrcA[i] * pSrcB[i+1]) >> 14) + (((q63_t)pSrcA[i+1] * pSrcB[i]  ) >> 14);
44 
        }
45 
 
46 
        *realResult = sumr;
47 
        *imagResult = sumi;
48 
}
49 
 
50 
void ref_cmplx_dot_prod_q15(
51 
  q15_t * pSrcA,
52 
  q15_t * pSrcB,
53 
  uint32_t numSamples,
54 
  q31_t * realResult,
55 
  q31_t * imagResult)
56 
{
57 
        q63_t sumr, sumi;
58 
        uint32_t i;
59 
 
60 
        sumr = 0;
61 
        sumi = 0;
62 
 
63 
        for(i=0;i<numSamples*2;i+=2)
64 
        {
65 
                sumr += (q31_t)pSrcA[i] * pSrcB[i]   - (q31_t)pSrcA[i+1] * pSrcB[i+1];
66 
                sumi += (q31_t)pSrcA[i] * pSrcB[i+1] + (q31_t)pSrcA[i+1] * pSrcB[i];
67 
        }
68 
 
69 
        //shifting down 6 at the end here because there are already 32 guard bits available, this method is more accurate
70 
        *realResult = (q31_t)(sumr >> 6);
71 
        *imagResult = (q31_t)(sumi >> 6);
72 
}