Ryan Volz
62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
/*
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* Copyright (C) 2016 Bastian Bloessl <bloessl@ccs-labs.org>
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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, either 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 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 INCLUDED_IEEE802_11_VITERBI_DECODER_X86_H
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#define INCLUDED_IEEE802_11_VITERBI_DECODER_X86_H
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#include "base.h"
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#include <xmmintrin.h>
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namespace gr {
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namespace ieee802_11 {
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/* This Viterbi decoder was taken from the gr-dvbt module of
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* GNU Radio. It is an SSE2 version of the Viterbi Decoder
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* created by Phil Karn. The SSE2 version was made by Bogdan
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* Diaconescu. For more info see: gr-dvbt/lib/d_viterbi.h
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*/
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class viterbi_decoder : public base
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{
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public:
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virtual uint8_t* decode(ofdm_param* ofdm, frame_param* frame, uint8_t* in);
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private:
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union branchtab27 {
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unsigned char c[32];
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__m128i v[2];
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} d_branchtab27_sse2[2];
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alignas(16) __m128i d_metric0[4];
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alignas(16) __m128i d_metric1[4];
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alignas(16) __m128i d_path0[4];
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alignas(16) __m128i d_path1[4];
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virtual void reset();
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void viterbi_chunks_init_sse2();
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void viterbi_butterfly2_sse2(
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unsigned char* symbols, __m128i m0[], __m128i m1[], __m128i p0[], __m128i p1[]);
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unsigned char viterbi_get_output_sse2(__m128i* mm0,
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__m128i* pp0,
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int ntraceback,
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unsigned char* outbuf);
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};
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} // namespace ieee802_11
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} // namespace gr
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#endif /* INCLUDED_IEEE802_11_VITERBI_DECODER_X86_H */
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