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144 lines
6.3 KiB
C++
144 lines
6.3 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2016 F4EXB //
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// written by Edouard Griffiths //
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// //
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// Integer half-band FIR based interpolator and decimator //
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// This is the even/odd and I/Q stride with double buffering variant //
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// This is the SIMD intrinsics code //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef SDRBASE_DSP_INTHALFBANDFILTERSTI_H_
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#define SDRBASE_DSP_INTHALFBANDFILTERSTI_H_
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#include <stdint.h>
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#if defined(USE_SSE4_1)
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#include <smmintrin.h>
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#endif
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#include "hbfiltertraits.h"
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template<uint32_t HBFilterOrder>
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class IntHalfbandFilterSTIntrinsics
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{
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public:
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static void work(
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int32_t samples[HBFilterOrder][2],
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int32_t& iEvenAcc, int32_t& qEvenAcc,
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int32_t& iOddAcc, int32_t& qOddAcc)
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{
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#if defined(USE_SSE4_1)
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int a = HBFIRFilterTraits<HBFilterOrder>::hbOrder - 2; // tip
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int b = 0; // tail
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const int *h = (const int*) HBFIRFilterTraits<HBFilterOrder>::hbCoeffs;
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__m128i sum = _mm_setzero_si128();
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__m128i shh, sa, sb;
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int32_t sums[4] __attribute__ ((aligned (16)));
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for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 16; i++)
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{
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shh = _mm_set_epi32(h[4*i], h[4*i], h[4*i], h[4*i]);
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sa = _mm_load_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
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sb = _mm_load_si128((__m128i*) &(samples[b][0]));
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sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
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a -= 2;
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b += 2;
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shh = _mm_set_epi32(h[4*i+1], h[4*i+1], h[4*i+1], h[4*i+1]);
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sa = _mm_load_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
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sb = _mm_load_si128((__m128i*) &(samples[b][0]));
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sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
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a -= 2;
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b += 2;
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shh = _mm_set_epi32(h[4*i+2], h[4*i+2], h[4*i+2], h[4*i+2]);
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sa = _mm_load_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
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sb = _mm_load_si128((__m128i*) &(samples[b][0]));
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sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
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a -= 2;
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b += 2;
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shh = _mm_set_epi32(h[4*i+3], h[4*i+3], h[4*i+3], h[4*i+3]);
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sa = _mm_load_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
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sb = _mm_load_si128((__m128i*) &(samples[b][0]));
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sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
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a -= 2;
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b += 2;
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}
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// Extract values from sum vector
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_mm_store_si128((__m128i*) sums, sum);
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iEvenAcc = sums[0];
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qEvenAcc = sums[1];
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iOddAcc = sums[2];
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qOddAcc = sums[3];
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#endif
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}
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// not aligned version
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static void workNA(
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int ptr,
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int32_t samples[HBFilterOrder*2][2],
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int32_t& iEvenAcc, int32_t& qEvenAcc,
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int32_t& iOddAcc, int32_t& qOddAcc)
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{
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#if defined(USE_SSE4_1)
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int a = ptr + HBFIRFilterTraits<HBFilterOrder>::hbOrder - 2; // tip
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int b = ptr + 0; // tail
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const int *h = (const int*) HBFIRFilterTraits<HBFilterOrder>::hbCoeffs;
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__m128i sum = _mm_setzero_si128();
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__m128i shh, sa, sb;
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int32_t sums[4] __attribute__ ((aligned (16)));
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for (int i = 0; i < HBFIRFilterTraits<HBFilterOrder>::hbOrder / 16; i++)
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{
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shh = _mm_set_epi32(h[4*i], h[4*i], h[4*i], h[4*i]);
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sa = _mm_loadu_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
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sb = _mm_loadu_si128((__m128i*) &(samples[b][0]));
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sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
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a -= 2;
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b += 2;
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shh = _mm_set_epi32(h[4*i+1], h[4*i+1], h[4*i+1], h[4*i+1]);
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sa = _mm_loadu_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
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sb = _mm_loadu_si128((__m128i*) &(samples[b][0]));
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sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
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a -= 2;
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b += 2;
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shh = _mm_set_epi32(h[4*i+2], h[4*i+2], h[4*i+2], h[4*i+2]);
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sa = _mm_loadu_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
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sb = _mm_loadu_si128((__m128i*) &(samples[b][0]));
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sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
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a -= 2;
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b += 2;
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shh = _mm_set_epi32(h[4*i+3], h[4*i+3], h[4*i+3], h[4*i+3]);
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sa = _mm_loadu_si128((__m128i*) &(samples[a][0])); // Ei,Eq,Oi,Oq
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sb = _mm_loadu_si128((__m128i*) &(samples[b][0]));
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sum = _mm_add_epi32(sum, _mm_mullo_epi32(_mm_add_epi32(sa, sb), shh));
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a -= 2;
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b += 2;
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}
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// Extract values from sum vector
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_mm_store_si128((__m128i*) sums, sum);
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iEvenAcc = sums[0];
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qEvenAcc = sums[1];
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iOddAcc = sums[2];
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qOddAcc = sums[3];
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#endif
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}
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};
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#endif /* SDRBASE_DSP_INTHALFBANDFILTERSTI_H_ */
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