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Fixed point utility (1)

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f4exb 2018-02-03 07:18:26 +01:00
parent bcdaf91288
commit 4cd6d5bd6e
4 changed files with 2074 additions and 0 deletions
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2
sdrbase/CMakeLists.txt
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@ -62,6 +62,7 @@ set(sdrbase_SOURCES
util/CRC64.cpp
util/db.cpp
util/fixedtraits.cpp
util/message.cpp
util/messagequeue.cpp
util/prettyprint.cpp
@ -168,6 +169,7 @@ set(sdrbase_HEADERS
util/db.h
util/doublebuffer.h
util/export.h
util/fixedtraits.h
util/message.h
util/messagequeue.h
util/movingaverage.h

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sdrbase/util/fixed.h Normal file
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46
sdrbase/util/fixedtraits.cpp Normal file
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@ -0,0 +1,46 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018 F4EXB //
// written by Edouard Griffiths //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include "fixedtraits.h"
const int64_t FixedTraits<28>::log_two_power_n_reversed[35] = {
0x18429946ELL,0x1791272EFLL,0x16DFB516FLL,0x162E42FF0LL,0x157CD0E70LL,0x14CB5ECF1LL,0x1419ECB71LL,0x13687A9F2LL,
0x12B708872LL,0x1205966F3LL,0x115424573LL,0x10A2B23F4LL,0xFF140274LL,0xF3FCE0F5LL,0xE8E5BF75LL,0xDDCE9DF6LL,
0xD2B77C76LL,0xC7A05AF7LL,0xBC893977LL,0xB17217F8LL,0xA65AF679LL,0x9B43D4F9LL,0x902CB379LL,0x851591FaLL,
0x79FE707bLL,0x6EE74EFbLL,0x63D02D7BLL,0x58B90BFcLL,0x4DA1EA7CLL,0x428AC8FdLL,0x3773A77DLL,0x2C5C85FeLL,
0x2145647ELL,0x162E42FfLL,0xB17217FLL
};
const int64_t FixedTraits<28>::log_one_plus_two_power_minus_n[28] = {
0x67CC8FBLL,0x391FEF9LL,0x1E27077LL,0xF85186LL,
0x7E0A6CLL,0x3F8151LL,0x1FE02ALL,0xFF805LL,0x7FE01LL,0x3FF80LL,0x1FFE0LL,0xFFF8LL,
0x7FFELL,0x4000LL,0x2000LL,0x1000LL,0x800LL,0x400LL,0x200LL,0x100LL,
0x80LL,0x40LL,0x20LL,0x10LL,0x8LL,0x4LL,0x2LL,0x1LL
};
const int64_t FixedTraits<28>::log_one_over_one_minus_two_power_minus_n[28] = {
0xB172180LL,0x49A5884LL,0x222F1D0LL,0x108598BLL,
0x820AECLL,0x408159LL,0x20202BLL,0x100805LL,0x80201LL,0x40080LL,0x20020LL,0x10008LL,
0x8002LL,0x4001LL,0x2000LL,0x1000LL,0x800LL,0x400LL,0x200LL,0x100LL,
0x80LL,0x40LL,0x20LL,0x10LL,0x8LL,0x4LL,0x2LL,0x1LL
};
const int64_t FixedTraits<28>::arctantab[32] = {
297197971, 210828714, 124459457, 65760959, 33381290, 16755422, 8385879,
4193963, 2097109, 1048571, 524287, 262144, 131072, 65536, 32768, 16384,
8192, 4096, 2048, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1, 0, 0,
};

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sdrbase/util/fixedtraits.h Normal file
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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018 F4EXB //
// written by Edouard Griffiths //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef SDRBASE_UTIL_FIXEDTRAITS_H_
#define SDRBASE_UTIL_FIXEDTRAITS_H_
#include <stdint.h>
template<uint32_t IntBits>
class FixedTraits
{
};
template<>
class FixedTraits<28>
{
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
static const int64_t fixed_resolution = 1LL << 28;
static const int64_t internal_pi = 0x3243f6a8;
static const int64_t internal_two_pi = 0x6487ed51;
static const int64_t internal_half_pi = 0x1921fb54;
static const int64_t internal_quarter_pi = 0xc90fdaa;
static const int64_t log_two_power_n_reversed[35]; // 35 = 63 - 28
static const int64_t log_one_plus_two_power_minus_n[28];
static const int64_t log_one_over_one_minus_two_power_minus_n[28];
static const int64_t arctantab[32];
};
#endif /* SDRBASE_UTIL_FIXEDTRAITS_H_ */