IntHalfbandFilterEO1Intrisics< HBFilterOrder > Class Template Reference

#include <inthalfbandfiltereo1i.h>

Static Public Member Functions
static void	work (int ptr, int32_t even[2][HBFilterOrder], int32_t odd[2][HBFilterOrder], int32_t &iAcc, int32_t &qAcc)

Detailed Description

template<uint32_t HBFilterOrder>
class IntHalfbandFilterEO1Intrisics< HBFilterOrder >

Definition at line 35 of file inthalfbandfiltereo1i.h.

Member Function Documentation

work()

template<uint32_t HBFilterOrder>

static void IntHalfbandFilterEO1Intrisics< HBFilterOrder >::work ( int  ptr, int32_t  even[2][HBFilterOrder], int32_t  odd[2][HBFilterOrder], int32_t &  iAcc, int32_t &  qAcc  )

inlinestatic

Definition at line 38 of file inthalfbandfiltereo1i.h.

References i.

    {
#if defined(USE_SSE4_1)
        int a = ptr/2 + HBFIRFilterTraits<HBFilterOrder>::hbOrder/2; // tip pointer
        int b = ptr/2 + 1; // tail pointer
        const __m128i* h = (const __m128i*) HBFIRFilterTraits<HBFilterOrder>::hbCoeffs;
        __m128i sumI = _mm_setzero_si128();
        __m128i sumQ = _mm_setzero_si128();
        __m128i sa, sb;
        a -= 3;

        for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 16; i++)
        {
            if ((ptr % 2) == 0)
            {
                sa = _mm_shuffle_epi32(_mm_loadu_si128((__m128i*) &(even[0][a])), _MM_SHUFFLE(0,1,2,3));
                sb = _mm_loadu_si128((__m128i*) &(even[0][b]));
                sumI = _mm_add_epi32(sumI, _mm_mullo_epi32(_mm_add_epi32(sa, sb), *h));

                sa = _mm_shuffle_epi32(_mm_loadu_si128((__m128i*) &(even[1][a])), _MM_SHUFFLE(0,1,2,3));
                sb = _mm_loadu_si128((__m128i*) &(even[1][b]));
                sumQ = _mm_add_epi32(sumQ, _mm_mullo_epi32(_mm_add_epi32(sa, sb), *h));
            }
            else
            {
                sa = _mm_shuffle_epi32(_mm_loadu_si128((__m128i*) &(odd[0][a])), _MM_SHUFFLE(0,1,2,3));
                sb = _mm_loadu_si128((__m128i*) &(odd[0][b]));
                sumI = _mm_add_epi32(sumI, _mm_mullo_epi32(_mm_add_epi32(sa, sb), *h));

                sa = _mm_shuffle_epi32(_mm_loadu_si128((__m128i*) &(odd[1][a])), _MM_SHUFFLE(0,1,2,3));
                sb = _mm_loadu_si128((__m128i*) &(odd[1][b]));
                sumQ = _mm_add_epi32(sumQ, _mm_mullo_epi32(_mm_add_epi32(sa, sb), *h));
            }

            a -= 4;
            b += 4;
            ++h;
        }

        // horizontal add of four 32 bit partial sums

        sumI = _mm_add_epi32(sumI, _mm_srli_si128(sumI, 8));
        sumI = _mm_add_epi32(sumI, _mm_srli_si128(sumI, 4));
        iAcc = _mm_cvtsi128_si32(sumI);

        sumQ = _mm_add_epi32(sumQ, _mm_srli_si128(sumQ, 8));
        sumQ = _mm_add_epi32(sumQ, _mm_srli_si128(sumQ, 4));
        qAcc = _mm_cvtsi128_si32(sumQ);
#endif
    }

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The documentation for this class was generated from the following file:

• sdrbase/dsp/inthalfbandfiltereo1i.h