// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html
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// This file is based on files from package issued with the following license:
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/*============================================================================
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This C header file is part of the SoftFloat IEEE Floating-Point Arithmetic
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Package, Release 3c, by John R. Hauser.
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Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017 The Regents of the
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University of California. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions, and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions, and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the University nor the names of its contributors may
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be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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=============================================================================*/
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#pragma once
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#ifndef softfloat_h
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#define softfloat_h 1
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#include "cvdef.h"
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// int32_t / uint32_t
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#if defined(_MSC_VER) && _MSC_VER < 1600 /* MSVS 2010 */
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namespace cv {
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typedef signed int int32_t;
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typedef unsigned int uint32_t;
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}
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#elif defined(_MSC_VER) || __cplusplus >= 201103L
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#include <cstdint>
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#else
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#include <stdint.h>
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#endif
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namespace cv
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{
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struct softfloat;
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struct softdouble;
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struct CV_EXPORTS softfloat
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{
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public:
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softfloat() { v = 0; }
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softfloat( const softfloat& c) { v = c.v; }
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softfloat& operator=( const softfloat& c )
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{
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if(&c != this) v = c.v;
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return *this;
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}
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static const softfloat fromRaw( const uint32_t a ) { softfloat x; x.v = a; return x; }
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explicit softfloat( const uint32_t );
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explicit softfloat( const uint64_t );
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explicit softfloat( const int32_t );
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explicit softfloat( const int64_t );
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explicit softfloat( const float a ) { Cv32suf s; s.f = a; v = s.u; }
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operator softdouble() const;
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operator float() const { Cv32suf s; s.u = v; return s.f; }
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softfloat operator + (const softfloat&) const;
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softfloat operator - (const softfloat&) const;
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softfloat operator * (const softfloat&) const;
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softfloat operator / (const softfloat&) const;
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softfloat operator % (const softfloat&) const;
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softfloat operator - () const { softfloat x; x.v = v ^ (1U << 31); return x; }
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softfloat& operator += (const softfloat& a) { *this = *this + a; return *this; }
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softfloat& operator -= (const softfloat& a) { *this = *this - a; return *this; }
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softfloat& operator *= (const softfloat& a) { *this = *this * a; return *this; }
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softfloat& operator /= (const softfloat& a) { *this = *this / a; return *this; }
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softfloat& operator %= (const softfloat& a) { *this = *this % a; return *this; }
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bool operator == ( const softfloat& ) const;
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bool operator != ( const softfloat& ) const;
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bool operator > ( const softfloat& ) const;
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bool operator >= ( const softfloat& ) const;
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bool operator < ( const softfloat& ) const;
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bool operator <= ( const softfloat& ) const;
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bool isNaN() const { return (v & 0x7fffffff) > 0x7f800000; }
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bool isInf() const { return (v & 0x7fffffff) == 0x7f800000; }
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static softfloat zero() { return softfloat::fromRaw( 0 ); }
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static softfloat inf() { return softfloat::fromRaw( 0xFF << 23 ); }
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static softfloat nan() { return softfloat::fromRaw( 0x7fffffff ); }
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static softfloat one() { return softfloat::fromRaw( 127 << 23 ); }
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uint32_t v;
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};
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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struct CV_EXPORTS softdouble
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{
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public:
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softdouble() : v(0) { }
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softdouble( const softdouble& c) { v = c.v; }
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softdouble& operator=( const softdouble& c )
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{
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if(&c != this) v = c.v;
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return *this;
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}
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static softdouble fromRaw( const uint64_t a ) { softdouble x; x.v = a; return x; }
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explicit softdouble( const uint32_t );
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explicit softdouble( const uint64_t );
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explicit softdouble( const int32_t );
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explicit softdouble( const int64_t );
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explicit softdouble( const double a ) { Cv64suf s; s.f = a; v = s.u; }
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operator softfloat() const;
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operator double() const { Cv64suf s; s.u = v; return s.f; }
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softdouble operator + (const softdouble&) const;
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softdouble operator - (const softdouble&) const;
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softdouble operator * (const softdouble&) const;
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softdouble operator / (const softdouble&) const;
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softdouble operator % (const softdouble&) const;
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softdouble operator - () const { softdouble x; x.v = v ^ (1ULL << 63); return x; }
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softdouble& operator += (const softdouble& a) { *this = *this + a; return *this; }
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softdouble& operator -= (const softdouble& a) { *this = *this - a; return *this; }
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softdouble& operator *= (const softdouble& a) { *this = *this * a; return *this; }
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softdouble& operator /= (const softdouble& a) { *this = *this / a; return *this; }
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softdouble& operator %= (const softdouble& a) { *this = *this % a; return *this; }
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bool operator == ( const softdouble& ) const;
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bool operator != ( const softdouble& ) const;
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bool operator > ( const softdouble& ) const;
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bool operator >= ( const softdouble& ) const;
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bool operator < ( const softdouble& ) const;
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bool operator <= ( const softdouble& ) const;
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bool isNaN() const { return (v & 0x7fffffffffffffff) > 0x7ff0000000000000; }
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bool isInf() const { return (v & 0x7fffffffffffffff) == 0x7ff0000000000000; }
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static softdouble zero() { return softdouble::fromRaw( 0 ); }
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static softdouble inf() { return softdouble::fromRaw( (uint_fast64_t)(0x7FF) << 52 ); }
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static softdouble nan() { return softdouble::fromRaw( CV_BIG_INT(0x7FFFFFFFFFFFFFFF) ); }
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static softdouble one() { return softdouble::fromRaw( (uint_fast64_t)( 1023) << 52 ); }
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uint64_t v;
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};
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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CV_EXPORTS softfloat mulAdd( const softfloat& a, const softfloat& b, const softfloat & c);
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CV_EXPORTS softdouble mulAdd( const softdouble& a, const softdouble& b, const softdouble& c);
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CV_EXPORTS softfloat sqrt( const softfloat& a );
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CV_EXPORTS softdouble sqrt( const softdouble& a );
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}
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/*----------------------------------------------------------------------------
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| Ported from OpenCV and added for usability
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*----------------------------------------------------------------------------*/
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CV_EXPORTS int cvTrunc(const cv::softfloat& a);
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CV_EXPORTS int cvTrunc(const cv::softdouble& a);
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CV_EXPORTS int cvRound(const cv::softfloat& a);
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CV_EXPORTS int cvRound(const cv::softdouble& a);
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CV_EXPORTS int cvFloor(const cv::softfloat& a);
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CV_EXPORTS int cvFloor(const cv::softdouble& a);
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CV_EXPORTS int cvCeil(const cv::softfloat& a);
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CV_EXPORTS int cvCeil(const cv::softdouble& a);
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namespace cv
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{
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template<typename _Tp> static inline _Tp saturate_cast(softfloat a) { return _Tp(a); }
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template<typename _Tp> static inline _Tp saturate_cast(softdouble a) { return _Tp(a); }
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template<> inline uchar saturate_cast<uchar>(softfloat a) { return (uchar)std::max(std::min(cvRound(a), (int)UCHAR_MAX), 0); }
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template<> inline uchar saturate_cast<uchar>(softdouble a) { return (uchar)std::max(std::min(cvRound(a), (int)UCHAR_MAX), 0); }
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template<> inline schar saturate_cast<schar>(softfloat a) { return (schar)std::min(std::max(cvRound(a), (int)SCHAR_MIN), (int)SCHAR_MAX); }
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template<> inline schar saturate_cast<schar>(softdouble a) { return (schar)std::min(std::max(cvRound(a), (int)SCHAR_MIN), (int)SCHAR_MAX); }
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template<> inline ushort saturate_cast<ushort>(softfloat a) { return (ushort)std::max(std::min(cvRound(a), (int)USHRT_MAX), 0); }
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template<> inline ushort saturate_cast<ushort>(softdouble a) { return (ushort)std::max(std::min(cvRound(a), (int)USHRT_MAX), 0); }
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template<> inline short saturate_cast<short>(softfloat a) { return (short)std::min(std::max(cvRound(a), (int)SHRT_MIN), (int)SHRT_MAX); }
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template<> inline short saturate_cast<short>(softdouble a) { return (short)std::min(std::max(cvRound(a), (int)SHRT_MIN), (int)SHRT_MAX); }
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template<> inline int saturate_cast<int>(softfloat a) { return cvRound(a); }
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template<> inline int saturate_cast<int>(softdouble a) { return cvRound(a); }
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// we intentionally do not clip negative numbers, to make -1 become 0xffffffff etc.
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template<> inline unsigned saturate_cast<unsigned>(softfloat a) { return cvRound(a); }
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template<> inline unsigned saturate_cast<unsigned>(softdouble a) { return cvRound(a); }
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inline softfloat min(const softfloat& a, const softfloat& b) { return (a > b) ? b : a; }
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inline softdouble min(const softdouble& a, const softdouble& b) { return (a > b) ? b : a; }
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inline softfloat max(const softfloat& a, const softfloat& b) { return (a > b) ? a : b; }
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inline softdouble max(const softdouble& a, const softdouble& b) { return (a > b) ? a : b; }
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inline softfloat abs( softfloat a) { softfloat x; x.v = a.v & ((1U << 31) - 1); return x; }
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inline softdouble abs( softdouble a) { softdouble x; x.v = a.v & ((1ULL << 63) - 1); return x; }
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CV_EXPORTS softfloat exp( const softfloat& a);
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CV_EXPORTS softdouble exp( const softdouble& a);
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CV_EXPORTS softfloat log( const softfloat& a );
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CV_EXPORTS softdouble log( const softdouble& a );
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CV_EXPORTS softfloat pow( const softfloat& a, const softfloat& b);
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CV_EXPORTS softdouble pow( const softdouble& a, const softdouble& b);
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CV_EXPORTS softfloat cbrt(const softfloat& a);
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}
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#endif
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