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95 lines
4.6 KiB
C++
95 lines
4.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2018 F4EXB //
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// written by Edouard Griffiths //
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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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// //
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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_UTIL_FIXEDTRAITS_H_
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#define SDRBASE_UTIL_FIXEDTRAITS_H_
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#include <stdint.h>
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#include "util/export.h"
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template<uint32_t IntBits>
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class FixedTraits
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{
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};
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template<>
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struct SDRBASE_API FixedTraits<28>
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{
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static const uint32_t fixed_resolution_shift = 28; //!< 1.0 representation. 28 is the highest power of two that can represent 9.99999... safely on 64 bits internally
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static const int64_t fixed_resolution = 1LL << fixed_resolution_shift;
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static const int32_t max_power = 63 - fixed_resolution_shift;
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static const int64_t internal_pi = 0x3243f6a8;
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static const int64_t internal_two_pi = 0x6487ed51;
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static const int64_t internal_half_pi = 0x1921fb54;
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static const int64_t internal_quarter_pi = 0xc90fdaa;
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static const int64_t log_two_power_n_reversed[35]; // 35 = 63 - 28
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static const int64_t log_one_plus_two_power_minus_n[28];
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static const int64_t log_one_over_one_minus_two_power_minus_n[28];
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static const int64_t arctantab[32];
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};
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template<>
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struct SDRBASE_API FixedTraits<16>
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{
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static const uint32_t fixed_resolution_shift = 16;
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static const int64_t fixed_resolution = 1LL << fixed_resolution_shift;
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static const int32_t max_power = 63 - fixed_resolution_shift;
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static const int64_t internal_pi = 205887;
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static const int64_t internal_two_pi = 411775;
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static const int64_t internal_half_pi = 102944;
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static const int64_t internal_quarter_pi = 51472;
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static const int64_t log_two_power_n_reversed[47]; // 47 = 63 - 16
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static const int64_t log_one_plus_two_power_minus_n[16];
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static const int64_t log_one_over_one_minus_two_power_minus_n[16];
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static const int64_t arctantab[32];
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};
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template<>
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struct SDRBASE_API FixedTraits<23>
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{
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static const uint32_t fixed_resolution_shift = 23;
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static const int64_t fixed_resolution = 1LL << fixed_resolution_shift;
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static const int32_t max_power = 63 - fixed_resolution_shift;
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static const int64_t internal_pi = 26353589;
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static const int64_t internal_two_pi = 52707179;
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static const int64_t internal_half_pi = 13176795;
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static const int64_t internal_quarter_pi = 6588397;
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static const int64_t log_two_power_n_reversed[40]; // 40 = 63 - 23
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static const int64_t log_one_plus_two_power_minus_n[23];
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static const int64_t log_one_over_one_minus_two_power_minus_n[23];
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static const int64_t arctantab[32];
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};
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template<>
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struct SDRBASE_API FixedTraits<24>
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{
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static const uint32_t fixed_resolution_shift = 24;
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static const int64_t fixed_resolution = 1LL << fixed_resolution_shift;
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static const int32_t max_power = 63 - fixed_resolution_shift;
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static const int64_t internal_pi = 52707179;
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static const int64_t internal_two_pi = 105414357;
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static const int64_t internal_half_pi = 26353589;
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static const int64_t internal_quarter_pi = 13176795;
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static const int64_t log_two_power_n_reversed[39]; // 39 = 63 - 24
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static const int64_t log_one_plus_two_power_minus_n[24];
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static const int64_t log_one_over_one_minus_two_power_minus_n[24];
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static const int64_t arctantab[32];
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};
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#endif /* SDRBASE_UTIL_FIXEDTRAITS_H_ */
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