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File:	src/util/floatingpoint.h	Lines:	62	65	95.4 %
Date:	2021-08-19	Branches:	9	18	50.0 %


/******************************************************************************
 * Top contributors (to current version):
 *   Aina Niemetz, Martin Brain, Mathias Preiner
 * Copyright (c) 2013  University of Oxford
 *
 * This file is part of the cvc5 project.
 *
 * Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
 * in the top-level source directory and their institutional affiliations.
 * All rights reserved.  See the file COPYING in the top-level source
 * directory for licensing information.
 * ****************************************************************************
 *
 * A floating-point value.
 *
 * This file contains the data structures used by the constant and parametric
 * types of the floating point theory.
 */
#include "cvc5_public.h"

#ifndef CVC5__FLOATINGPOINT_H
#define CVC5__FLOATINGPOINT_H

#include <memory>

#include "util/bitvector.h"
#include "util/floatingpoint_size.h"
#include "util/rational.h"
#include "util/roundingmode.h"

/* -------------------------------------------------------------------------- */

namespace cvc5 {

/* -------------------------------------------------------------------------- */

class FloatingPointLiteral;

class FloatingPoint
{
 public:
  /**
   * Wrappers to represent results of non-total functions (e.g., min/max).
   * The Boolean flag is true if the result is defined, and false otherwise.
   */
  using PartialFloatingPoint = std::pair<FloatingPoint, bool>;
  using PartialBitVector = std::pair<BitVector, bool>;
  using PartialRational = std::pair<Rational, bool>;

  /**
   * Get the number of exponent bits in the unpacked format corresponding to a
   * given packed format.  This is the unpacked counter-part of
   * FloatingPointSize::exponentWidth().
   */
  static uint32_t getUnpackedExponentWidth(FloatingPointSize& size);
  /**
   * Get the number of exponent bits in the unpacked format corresponding to a
   * given packed format.  This is the unpacked counter-part of
   * FloatingPointSize::significandWidth().
   */
  static uint32_t getUnpackedSignificandWidth(FloatingPointSize& size);

  /** Constructors. */

  /** Create a FP value from its IEEE bit-vector representation. */
  FloatingPoint(uint32_t e, uint32_t s, const BitVector& bv);
  FloatingPoint(const FloatingPointSize& size, const BitVector& bv);

  /**
   * Create a FP value from a signed or unsigned bit-vector value with
   * respect to given rounding mode.
   */
  FloatingPoint(const FloatingPointSize& size,
                const RoundingMode& rm,
                const BitVector& bv,
                bool signedBV);

  /**
   * Create a FP value from a rational value with respect to given rounding
   * mode.
   */
  FloatingPoint(const FloatingPointSize& size,
                const RoundingMode& rm,
                const Rational& r);

  /** Copy constructor. */
  FloatingPoint(const FloatingPoint& fp);

  /** Destructor. */
  ~FloatingPoint();

  /**
   * Create a FP NaN value of given size.
   * size: The FP size (format).
   */
  static FloatingPoint makeNaN(const FloatingPointSize& size);
  /**
   * Create a FP infinity value of given size.
   * size: The FP size (format).
   * sign: True for -oo, false otherwise.
   */
  static FloatingPoint makeInf(const FloatingPointSize& size, bool sign);
  /**
   * Create a FP zero value of given size.
   * size: The FP size (format).
   * sign: True for -zero, false otherwise.
   */
  static FloatingPoint makeZero(const FloatingPointSize& size, bool sign);
  /**
   * Create the smallest subnormal FP value of given size.
   * size: The FP size (format).
   * sign: True for negative sign, false otherwise.
   */
  static FloatingPoint makeMinSubnormal(const FloatingPointSize& size,
                                        bool sign);
  /**
   * Create the largest subnormal FP value of given size.
   * size: The FP size (format).
   * sign: True for negative sign, false otherwise.
   */
  static FloatingPoint makeMaxSubnormal(const FloatingPointSize& size,
                                        bool sign);
  /**
   * Create the smallest normal FP value of given size.
   * size: The FP size (format).
   * sign: True for negative sign, false otherwise.
   */
  static FloatingPoint makeMinNormal(const FloatingPointSize& size, bool sign);
  /**
   * Create the largest normal FP value of given size.
   * size: The FP size (format).
   * sign: True for negative sign, false otherwise.
   */
  static FloatingPoint makeMaxNormal(const FloatingPointSize& size, bool sign);

  /** Return the size of this FP value. */
  const FloatingPointSize& getSize() const;

  /** Get the wrapped floating-point value. */
  const FloatingPointLiteral* getLiteral(void) const { return d_fpl.get(); }

  /**
   * Return a string representation of this floating-point.
   *
   * If printAsIndexed is true then it prints the bit-vector components of the
   * FP value as indexed symbols, otherwise in binary notation.
   */
  std::string toString(bool printAsIndexed = false) const;

  /** Return the packed (IEEE-754) representation of this floating-point. */
  BitVector pack(void) const;

  /** Floating-point absolute value. */
  FloatingPoint absolute(void) const;
  /** Floating-point negation. */
  FloatingPoint negate(void) const;
  /** Floating-point addition. */
  FloatingPoint add(const RoundingMode& rm, const FloatingPoint& arg) const;
  /** Floating-point subtraction. */
  FloatingPoint sub(const RoundingMode& rm, const FloatingPoint& arg) const;
  /** Floating-point multiplication. */
  FloatingPoint mult(const RoundingMode& rm, const FloatingPoint& arg) const;
  /** Floating-point division. */
  FloatingPoint div(const RoundingMode& rm, const FloatingPoint& arg) const;
  /** Floating-point fused multiplication and addition. */
  FloatingPoint fma(const RoundingMode& rm,
                    const FloatingPoint& arg1,
                    const FloatingPoint& arg2) const;
  /** Floating-point square root. */
  FloatingPoint sqrt(const RoundingMode& rm) const;
  /** Floating-point round to integral. */
  FloatingPoint rti(const RoundingMode& rm) const;
  /** Floating-point remainder. */
  FloatingPoint rem(const FloatingPoint& arg) const;

  /**
   * Floating-point max (total version).
   * zeroCase: true to return the left (rather than the right operand) in case
   *           of max(-0,+0) or max(+0,-0).
   */
  FloatingPoint maxTotal(const FloatingPoint& arg, bool zeroCaseLeft) const;
  /**
   * Floating-point min (total version).
   * zeroCase: true to return the left (rather than the right operand) in case
   *           of min(-0,+0) or min(+0,-0).
   */
  FloatingPoint minTotal(const FloatingPoint& arg, bool zeroCaseLeft) const;

  /**
   * Floating-point max.
   *
   * Returns a partial floating-point, which is a pair of FloatingPoint and
   * bool. The boolean flag is true if the result is defined, and false if it
   * is undefined.
   */
  PartialFloatingPoint max(const FloatingPoint& arg) const;
  /** Floating-point min.
   *
   * Returns a partial floating-point, which is a pair of FloatingPoint and
   * bool. The boolean flag is true if the result is defined, and false if it
   * is undefined.
   */
  PartialFloatingPoint min(const FloatingPoint& arg) const;

  /** Equality (NOT: fp.eq but =) over floating-point values. */
  bool operator==(const FloatingPoint& fp) const;
  /** Floating-point less or equal than. */
  bool operator<=(const FloatingPoint& arg) const;
  /** Floating-point less than. */
  bool operator<(const FloatingPoint& arg) const;

  /** Get the exponent of this floating-point value. */
  BitVector getExponent() const;
  /** Get the significand of this floating-point value. */
  BitVector getSignificand() const;
  /** True if this value is a negative value. */
  bool getSign() const;

  /** Return true if this floating-point represents a normal value. */
  bool isNormal(void) const;
  /** Return true if this floating-point represents a subnormal value. */
  bool isSubnormal(void) const;
  /** Return true if this floating-point represents a zero value. */
  bool isZero(void) const;
  /** Return true if this floating-point represents an infinite value. */
  bool isInfinite(void) const;
  /** Return true if this floating-point represents a NaN value. */
  bool isNaN(void) const;
  /** Return true if this floating-point represents a negative value. */
  bool isNegative(void) const;
  /** Return true if this floating-point represents a positive value. */
  bool isPositive(void) const;

  /**
   * Convert this floating-point to a floating-point of given size, with
   * respect to given rounding mode.
   */
  FloatingPoint convert(const FloatingPointSize& target,
                        const RoundingMode& rm) const;

  /**
   * Convert this floating-point to a bit-vector of given size, with
   * respect to given rounding mode (total version).
   * Returns given bit-vector 'undefinedCase' in the undefined case.
   */
  BitVector convertToBVTotal(BitVectorSize width,
                             const RoundingMode& rm,
                             bool signedBV,
                             BitVector undefinedCase) const;
  /**
   * Convert this floating-point to a rational, with respect to given rounding
   * mode (total version).
   * Returns given rational 'undefinedCase' in the undefined case.
   */
  Rational convertToRationalTotal(Rational undefinedCase) const;

  /**
   * Convert this floating-point to a bit-vector of given size.
   *
   * Returns a partial bit-vector, which is a pair of BitVector and bool.
   * The boolean flag is true if the result is defined, and false if it
   * is undefined.
   */
  PartialBitVector convertToBV(BitVectorSize width,
                               const RoundingMode& rm,
                               bool signedBV) const;
  /**
   * Convert this floating-point to a Rational.
   *
   * Returns a partial Rational, which is a pair of Rational and bool.
   * The boolean flag is true if the result is defined, and false if it
   * is undefined.
   */
  PartialRational convertToRational(void) const;

 private:
  /**
   * Constructor.
   *
   * Note: This constructor takes ownership of 'fpl' and is not intended for
   *       public use.
   */
  FloatingPoint(FloatingPointLiteral* fpl);

  /** The floating-point literal of this floating-point value. */
  std::unique_ptr<FloatingPointLiteral> d_fpl;

}; /* class FloatingPoint */

/**
 * Hash function for floating-point values.
 */
struct FloatingPointHashFunction
{
  size_t operator()(const FloatingPoint& fp) const
  {
    FloatingPointSizeHashFunction fpshf;
    BitVectorHashFunction bvhf;

    return fpshf(fp.getSize()) ^ bvhf(fp.pack());
  }
}; /* struct FloatingPointHashFunction */

/* -------------------------------------------------------------------------- */

/**
 * The parameter type for the conversions to floating point.
 */
class FloatingPointConvertSort
{
 public:
  /** Constructors. */
  FloatingPointConvertSort(uint32_t _e, uint32_t _s) : d_fp_size(_e, _s) {}
  FloatingPointConvertSort(const FloatingPointSize& fps) : d_fp_size(fps) {}

  /** Operator overload for comparison of conversion sorts. */
  bool operator==(const FloatingPointConvertSort& fpcs) const
  {
    return d_fp_size == fpcs.d_fp_size;
  }

  /** Return the size of this FP convert sort. */
  FloatingPointSize getSize() const { return d_fp_size; }

 private:
  /** The floating-point size of this sort. */
  FloatingPointSize d_fp_size;
};

/** Hash function for conversion sorts. */
template <uint32_t key>
struct FloatingPointConvertSortHashFunction
{
  inline size_t operator()(const FloatingPointConvertSort& fpcs) const
  {
    FloatingPointSizeHashFunction f;
    return f(fpcs.getSize()) ^ (0x00005300 | (key << 24));
  }
}; /* struct FloatingPointConvertSortHashFunction */

/**
 * As different conversions are different parameterised kinds, there
 * is a need for different (C++) types for each one.
 */

/**
 * Conversion from floating-point to IEEE bit-vector (first bit represents the
 * sign, the following exponent width bits the exponent, and the remaining bits
 * the significand).
 */
class FloatingPointToFPIEEEBitVector : public FloatingPointConvertSort
{
 public:
  /** Constructors. */
  FloatingPointToFPIEEEBitVector(uint32_t _e, uint32_t _s)
      : FloatingPointConvertSort(_e, _s)
  {
  }
  FloatingPointToFPIEEEBitVector(const FloatingPointConvertSort& old)
      : FloatingPointConvertSort(old)
  {
  }
};

/**
 * Conversion from floating-point to another floating-point (of possibly
 * different size).
 */
class FloatingPointToFPFloatingPoint : public FloatingPointConvertSort
{
 public:
  /** Constructors. */
  FloatingPointToFPFloatingPoint(uint32_t _e, uint32_t _s)
      : FloatingPointConvertSort(_e, _s)
  {
  }
  FloatingPointToFPFloatingPoint(const FloatingPointConvertSort& old)
      : FloatingPointConvertSort(old)
  {
  }
};

/**
 * Conversion from floating-point to Real.
 */
class FloatingPointToFPReal : public FloatingPointConvertSort
{
 public:
  /** Constructors. */
  FloatingPointToFPReal(uint32_t _e, uint32_t _s)
      : FloatingPointConvertSort(_e, _s)
  {
  }
  FloatingPointToFPReal(const FloatingPointConvertSort& old)
      : FloatingPointConvertSort(old)
  {
  }
};

/**
 * Conversion from floating-point to signed bit-vector value.
 */
class FloatingPointToFPSignedBitVector : public FloatingPointConvertSort
{
 public:
  /** Constructors. */
  FloatingPointToFPSignedBitVector(uint32_t _e, uint32_t _s)
      : FloatingPointConvertSort(_e, _s)
  {
  }
  FloatingPointToFPSignedBitVector(const FloatingPointConvertSort& old)
      : FloatingPointConvertSort(old)
  {
  }
};

/**
 * Conversion from floating-point to unsigned bit-vector value.
 */
class FloatingPointToFPUnsignedBitVector : public FloatingPointConvertSort
{
 public:
  /** Constructors. */
  FloatingPointToFPUnsignedBitVector(uint32_t _e, uint32_t _s)
      : FloatingPointConvertSort(_e, _s)
  {
  }
  FloatingPointToFPUnsignedBitVector(const FloatingPointConvertSort& old)
      : FloatingPointConvertSort(old)
  {
  }
};

class FloatingPointToFPGeneric : public FloatingPointConvertSort
{
 public:
  /** Constructors. */
  FloatingPointToFPGeneric(uint32_t _e, uint32_t _s)
      : FloatingPointConvertSort(_e, _s)
  {
  }
  FloatingPointToFPGeneric(const FloatingPointConvertSort& old)
      : FloatingPointConvertSort(old)
  {
  }
};

/**
 * Base type for floating-point to bit-vector conversion.
 */
class FloatingPointToBV
{
 public:
  /** Constructors. */
  FloatingPointToBV(uint32_t s) : d_bv_size(s) {}
  FloatingPointToBV(const FloatingPointToBV& old) : d_bv_size(old.d_bv_size) {}
  FloatingPointToBV(const BitVectorSize& old) : d_bv_size(old) {}

  /** Return the bit-width of the bit-vector to convert to. */
  operator uint32_t() const { return d_bv_size; }

  /** The bit-width of the bit-vector to converto to. */
  BitVectorSize d_bv_size;
};

/**
 * Conversion from floating-point to unsigned bit-vector value.
 */
class FloatingPointToUBV : public FloatingPointToBV
{
 public:
  FloatingPointToUBV(uint32_t _s) : FloatingPointToBV(_s) {}
  FloatingPointToUBV(const FloatingPointToBV& old) : FloatingPointToBV(old) {}
};

/**
 * Conversion from floating-point to signed bit-vector value.
 */
class FloatingPointToSBV : public FloatingPointToBV
{
 public:
  FloatingPointToSBV(uint32_t _s) : FloatingPointToBV(_s) {}
  FloatingPointToSBV(const FloatingPointToBV& old) : FloatingPointToBV(old) {}
};

/**
 * Conversion from floating-point to unsigned bit-vector value (total version).
 */
class FloatingPointToUBVTotal : public FloatingPointToBV
{
 public:
  FloatingPointToUBVTotal(uint32_t _s) : FloatingPointToBV(_s) {}
  FloatingPointToUBVTotal(const FloatingPointToBV& old) : FloatingPointToBV(old)
  {
  }
};

/**
 * Conversion from floating-point to signed bit-vector value (total version).
 */
class FloatingPointToSBVTotal : public FloatingPointToBV
{
 public:
  FloatingPointToSBVTotal(uint32_t _s) : FloatingPointToBV(_s) {}
  FloatingPointToSBVTotal(const FloatingPointToBV& old) : FloatingPointToBV(old)
  {
  }
};

/**
 * Hash function for floating-point to bit-vector conversions.
 */
template <uint32_t key>
struct FloatingPointToBVHashFunction
{
  inline size_t operator()(const FloatingPointToBV& fptbv) const
  {
    UnsignedHashFunction< ::cvc5::BitVectorSize> f;
    return (key ^ 0x46504256) ^ f(fptbv.d_bv_size);
  }
}; /* struct FloatingPointToBVHashFunction */

/* Note: It is not possible to pack a number without a size to pack to,
 * thus it is difficult to implement output stream operator overloads for
 * FloatingPointLiteral in a sensible way. Use FloatingPoint instead. */

/** Output stream operator overloading for floating-point values. */
std::ostream& operator<<(std::ostream& os, const FloatingPoint& fp);

/** Output stream operator overloading for floating-point formats. */
std::ostream& operator<<(std::ostream& os, const FloatingPointSize& fps);

/** Output stream operator overloading for floating-point conversion sorts. */
std::ostream& operator<<(std::ostream& os,
                         const FloatingPointConvertSort& fpcs);

}  // namespace cvc5

#endif /* CVC5__FLOATINGPOINT_H */


Generated by: GCOVR (Version 3.2)

Line	Exec	Source
1		/******************************************************************************
2		* Top contributors (to current version):
3		* Aina Niemetz, Martin Brain, Mathias Preiner
4		* Copyright (c) 2013 University of Oxford
5		*
6		* This file is part of the cvc5 project.
7		*
8		* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
9		* in the top-level source directory and their institutional affiliations.
10		* All rights reserved. See the file COPYING in the top-level source
11		* directory for licensing information.
12		* ****************************************************************************
13		*
14		* A floating-point value.
15		*
16		* This file contains the data structures used by the constant and parametric
17		* types of the floating point theory.
18		*/
19		#include "cvc5_public.h"
20
21		#ifndef CVC5__FLOATINGPOINT_H
22		#define CVC5__FLOATINGPOINT_H
23
24		#include <memory>
25
26		#include "util/bitvector.h"
27		#include "util/floatingpoint_size.h"
28		#include "util/rational.h"
29		#include "util/roundingmode.h"
30
31		/* -------------------------------------------------------------------------- */
32
33		namespace cvc5 {
34
35		/* -------------------------------------------------------------------------- */
36
37		class FloatingPointLiteral;
38
39		class FloatingPoint
40		{
41		public:
42		/**
43		* Wrappers to represent results of non-total functions (e.g., min/max).
44		* The Boolean flag is true if the result is defined, and false otherwise.
45		*/
46		using PartialFloatingPoint = std::pair<FloatingPoint, bool>;
47		using PartialBitVector = std::pair<BitVector, bool>;
48		using PartialRational = std::pair<Rational, bool>;
49
50		/**
51		* Get the number of exponent bits in the unpacked format corresponding to a
52		* given packed format. This is the unpacked counter-part of
53		* FloatingPointSize::exponentWidth().
54		*/
55		static uint32_t getUnpackedExponentWidth(FloatingPointSize& size);
56		/**
57		* Get the number of exponent bits in the unpacked format corresponding to a
58		* given packed format. This is the unpacked counter-part of
59		* FloatingPointSize::significandWidth().
60		*/
61		static uint32_t getUnpackedSignificandWidth(FloatingPointSize& size);
62
63		/** Constructors. */
64
65		/** Create a FP value from its IEEE bit-vector representation. */
66		FloatingPoint(uint32_t e, uint32_t s, const BitVector& bv);
67		FloatingPoint(const FloatingPointSize& size, const BitVector& bv);
68
69		/**
70		* Create a FP value from a signed or unsigned bit-vector value with
71		* respect to given rounding mode.
72		*/
73		FloatingPoint(const FloatingPointSize& size,
74		const RoundingMode& rm,
75		const BitVector& bv,
76		bool signedBV);
77
78		/**
79		* Create a FP value from a rational value with respect to given rounding
80		* mode.
81		*/
82		FloatingPoint(const FloatingPointSize& size,
83		const RoundingMode& rm,
84		const Rational& r);
85
86		/** Copy constructor. */
87		FloatingPoint(const FloatingPoint& fp);
88
89		/** Destructor. */
90		~FloatingPoint();
91
92		/**
93		* Create a FP NaN value of given size.
94		* size: The FP size (format).
95		*/
96		static FloatingPoint makeNaN(const FloatingPointSize& size);
97		/**
98		* Create a FP infinity value of given size.
99		* size: The FP size (format).
100		* sign: True for -oo, false otherwise.
101		*/
102		static FloatingPoint makeInf(const FloatingPointSize& size, bool sign);
103		/**
104		* Create a FP zero value of given size.
105		* size: The FP size (format).
106		* sign: True for -zero, false otherwise.
107		*/
108		static FloatingPoint makeZero(const FloatingPointSize& size, bool sign);
109		/**
110		* Create the smallest subnormal FP value of given size.
111		* size: The FP size (format).
112		* sign: True for negative sign, false otherwise.
113		*/
114		static FloatingPoint makeMinSubnormal(const FloatingPointSize& size,
115		bool sign);
116		/**
117		* Create the largest subnormal FP value of given size.
118		* size: The FP size (format).
119		* sign: True for negative sign, false otherwise.
120		*/
121		static FloatingPoint makeMaxSubnormal(const FloatingPointSize& size,
122		bool sign);
123		/**
124		* Create the smallest normal FP value of given size.
125		* size: The FP size (format).
126		* sign: True for negative sign, false otherwise.
127		*/
128		static FloatingPoint makeMinNormal(const FloatingPointSize& size, bool sign);
129		/**
130		* Create the largest normal FP value of given size.
131		* size: The FP size (format).
132		* sign: True for negative sign, false otherwise.
133		*/
134		static FloatingPoint makeMaxNormal(const FloatingPointSize& size, bool sign);
135
136		/** Return the size of this FP value. */
137		const FloatingPointSize& getSize() const;
138
139		/** Get the wrapped floating-point value. */
140	256	const FloatingPointLiteral* getLiteral(void) const { return d_fpl.get(); }
141
142		/**
143		* Return a string representation of this floating-point.
144		*
145		* If printAsIndexed is true then it prints the bit-vector components of the
146		* FP value as indexed symbols, otherwise in binary notation.
147		*/
148		std::string toString(bool printAsIndexed = false) const;
149
150		/** Return the packed (IEEE-754) representation of this floating-point. */
151		BitVector pack(void) const;
152
153		/** Floating-point absolute value. */
154		FloatingPoint absolute(void) const;
155		/** Floating-point negation. */
156		FloatingPoint negate(void) const;
157		/** Floating-point addition. */
158		FloatingPoint add(const RoundingMode& rm, const FloatingPoint& arg) const;
159		/** Floating-point subtraction. */
160		FloatingPoint sub(const RoundingMode& rm, const FloatingPoint& arg) const;
161		/** Floating-point multiplication. */
162		FloatingPoint mult(const RoundingMode& rm, const FloatingPoint& arg) const;
163		/** Floating-point division. */
164		FloatingPoint div(const RoundingMode& rm, const FloatingPoint& arg) const;
165		/** Floating-point fused multiplication and addition. */
166		FloatingPoint fma(const RoundingMode& rm,
167		const FloatingPoint& arg1,
168		const FloatingPoint& arg2) const;
169		/** Floating-point square root. */
170		FloatingPoint sqrt(const RoundingMode& rm) const;
171		/** Floating-point round to integral. */
172		FloatingPoint rti(const RoundingMode& rm) const;
173		/** Floating-point remainder. */
174		FloatingPoint rem(const FloatingPoint& arg) const;
175
176		/**
177		* Floating-point max (total version).
178		* zeroCase: true to return the left (rather than the right operand) in case
179		* of max(-0,+0) or max(+0,-0).
180		*/
181		FloatingPoint maxTotal(const FloatingPoint& arg, bool zeroCaseLeft) const;
182		/**
183		* Floating-point min (total version).
184		* zeroCase: true to return the left (rather than the right operand) in case
185		* of min(-0,+0) or min(+0,-0).
186		*/
187		FloatingPoint minTotal(const FloatingPoint& arg, bool zeroCaseLeft) const;
188
189		/**
190		* Floating-point max.
191		*
192		* Returns a partial floating-point, which is a pair of FloatingPoint and
193		* bool. The boolean flag is true if the result is defined, and false if it
194		* is undefined.
195		*/
196		PartialFloatingPoint max(const FloatingPoint& arg) const;
197		/** Floating-point min.
198		*
199		* Returns a partial floating-point, which is a pair of FloatingPoint and
200		* bool. The boolean flag is true if the result is defined, and false if it
201		* is undefined.
202		*/
203		PartialFloatingPoint min(const FloatingPoint& arg) const;
204
205		/** Equality (NOT: fp.eq but =) over floating-point values. */
206		bool operator==(const FloatingPoint& fp) const;
207		/** Floating-point less or equal than. */
208		bool operator<=(const FloatingPoint& arg) const;
209		/** Floating-point less than. */
210		bool operator<(const FloatingPoint& arg) const;
211
212		/** Get the exponent of this floating-point value. */
213		BitVector getExponent() const;
214		/** Get the significand of this floating-point value. */
215		BitVector getSignificand() const;
216		/** True if this value is a negative value. */
217		bool getSign() const;
218
219		/** Return true if this floating-point represents a normal value. */
220		bool isNormal(void) const;
221		/** Return true if this floating-point represents a subnormal value. */
222		bool isSubnormal(void) const;
223		/** Return true if this floating-point represents a zero value. */
224		bool isZero(void) const;
225		/** Return true if this floating-point represents an infinite value. */
226		bool isInfinite(void) const;
227		/** Return true if this floating-point represents a NaN value. */
228		bool isNaN(void) const;
229		/** Return true if this floating-point represents a negative value. */
230		bool isNegative(void) const;
231		/** Return true if this floating-point represents a positive value. */
232		bool isPositive(void) const;
233
234		/**
235		* Convert this floating-point to a floating-point of given size, with
236		* respect to given rounding mode.
237		*/
238		FloatingPoint convert(const FloatingPointSize& target,
239		const RoundingMode& rm) const;
240
241		/**
242		* Convert this floating-point to a bit-vector of given size, with
243		* respect to given rounding mode (total version).
244		* Returns given bit-vector 'undefinedCase' in the undefined case.
245		*/
246		BitVector convertToBVTotal(BitVectorSize width,
247		const RoundingMode& rm,
248		bool signedBV,
249		BitVector undefinedCase) const;
250		/**
251		* Convert this floating-point to a rational, with respect to given rounding
252		* mode (total version).
253		* Returns given rational 'undefinedCase' in the undefined case.
254		*/
255		Rational convertToRationalTotal(Rational undefinedCase) const;
256
257		/**
258		* Convert this floating-point to a bit-vector of given size.
259		*
260		* Returns a partial bit-vector, which is a pair of BitVector and bool.
261		* The boolean flag is true if the result is defined, and false if it
262		* is undefined.
263		*/
264		PartialBitVector convertToBV(BitVectorSize width,
265		const RoundingMode& rm,
266		bool signedBV) const;
267		/**
268		* Convert this floating-point to a Rational.
269		*
270		* Returns a partial Rational, which is a pair of Rational and bool.
271		* The boolean flag is true if the result is defined, and false if it
272		* is undefined.
273		*/
274		PartialRational convertToRational(void) const;
275
276		private:
277		/**
278		* Constructor.
279		*
280		* Note: This constructor takes ownership of 'fpl' and is not intended for
281		* public use.
282		*/
283		FloatingPoint(FloatingPointLiteral* fpl);
284
285		/** The floating-point literal of this floating-point value. */
286		std::unique_ptr<FloatingPointLiteral> d_fpl;
287
288		}; /* class FloatingPoint */
289
290		/**
291		* Hash function for floating-point values.
292		*/
293		struct FloatingPointHashFunction
294		{
295	3155	size_t operator()(const FloatingPoint& fp) const
296		{
297		FloatingPointSizeHashFunction fpshf;
298		BitVectorHashFunction bvhf;
299
300	3155	return fpshf(fp.getSize()) ^ bvhf(fp.pack());
301		}
302		}; /* struct FloatingPointHashFunction */
303
304		/* -------------------------------------------------------------------------- */
305
306		/**
307		* The parameter type for the conversions to floating point.
308		*/
309	3898	class FloatingPointConvertSort
310		{
311		public:
312		/** Constructors. */
313	148	FloatingPointConvertSort(uint32_t _e, uint32_t _s) : d_fp_size(_e, _s) {}
314	2973	FloatingPointConvertSort(const FloatingPointSize& fps) : d_fp_size(fps) {}
315
316		/** Operator overload for comparison of conversion sorts. */
317	3340	bool operator==(const FloatingPointConvertSort& fpcs) const
318		{
319	3340	return d_fp_size == fpcs.d_fp_size;
320		}
321
322		/** Return the size of this FP convert sort. */
323	5693	FloatingPointSize getSize() const { return d_fp_size; }
324
325		private:
326		/** The floating-point size of this sort. */
327		FloatingPointSize d_fp_size;
328		};
329
330		/** Hash function for conversion sorts. */
331		template <uint32_t key>
332		struct FloatingPointConvertSortHashFunction
333		{
334	3715	inline size_t operator()(const FloatingPointConvertSort& fpcs) const
335		{
336		FloatingPointSizeHashFunction f;
337	3715	return f(fpcs.getSize()) ^ (0x00005300 \| (key << 24));
338		}
339		}; /* struct FloatingPointConvertSortHashFunction */
340
341		/**
342		* As different conversions are different parameterised kinds, there
343		* is a need for different (C++) types for each one.
344		*/
345
346		/**
347		* Conversion from floating-point to IEEE bit-vector (first bit represents the
348		* sign, the following exponent width bits the exponent, and the remaining bits
349		* the significand).
350		*/
351	447	class FloatingPointToFPIEEEBitVector : public FloatingPointConvertSort
352		{
353		public:
354		/** Constructors. */
355	6	FloatingPointToFPIEEEBitVector(uint32_t _e, uint32_t _s)
356	6	: FloatingPointConvertSort(_e, _s)
357		{
358	6	}
359	3003	FloatingPointToFPIEEEBitVector(const FloatingPointConvertSort& old)
360	3003	: FloatingPointConvertSort(old)
361		{
362	3003	}
363		};
364
365		/**
366		* Conversion from floating-point to another floating-point (of possibly
367		* different size).
368		*/
369	54	class FloatingPointToFPFloatingPoint : public FloatingPointConvertSort
370		{
371		public:
372		/** Constructors. */
373	6	FloatingPointToFPFloatingPoint(uint32_t _e, uint32_t _s)
374	6	: FloatingPointConvertSort(_e, _s)
375		{
376	6	}
377	8	FloatingPointToFPFloatingPoint(const FloatingPointConvertSort& old)
378	8	: FloatingPointConvertSort(old)
379		{
380	8	}
381		};
382
383		/**
384		* Conversion from floating-point to Real.
385		*/
386	46	class FloatingPointToFPReal : public FloatingPointConvertSort
387		{
388		public:
389		/** Constructors. */
390	6	FloatingPointToFPReal(uint32_t _e, uint32_t _s)
391	6	: FloatingPointConvertSort(_e, _s)
392		{
393	6	}
394	16	FloatingPointToFPReal(const FloatingPointConvertSort& old)
395	16	: FloatingPointConvertSort(old)
396		{
397	16	}
398		};
399
400		/**
401		* Conversion from floating-point to signed bit-vector value.
402		*/
403	30	class FloatingPointToFPSignedBitVector : public FloatingPointConvertSort
404		{
405		public:
406		/** Constructors. */
407	6	FloatingPointToFPSignedBitVector(uint32_t _e, uint32_t _s)
408	6	: FloatingPointConvertSort(_e, _s)
409		{
410	6	}
411	16	FloatingPointToFPSignedBitVector(const FloatingPointConvertSort& old)
412	16	: FloatingPointConvertSort(old)
413		{
414	16	}
415		};
416
417		/**
418		* Conversion from floating-point to unsigned bit-vector value.
419		*/
420	79	class FloatingPointToFPUnsignedBitVector : public FloatingPointConvertSort
421		{
422		public:
423		/** Constructors. */
424	18	FloatingPointToFPUnsignedBitVector(uint32_t _e, uint32_t _s)
425	18	: FloatingPointConvertSort(_e, _s)
426		{
427	18	}
428	24	FloatingPointToFPUnsignedBitVector(const FloatingPointConvertSort& old)
429	24	: FloatingPointConvertSort(old)
430		{
431	24	}
432		};
433
434	175	class FloatingPointToFPGeneric : public FloatingPointConvertSort
435		{
436		public:
437		/** Constructors. */
438	106	FloatingPointToFPGeneric(uint32_t _e, uint32_t _s)
439	106	: FloatingPointConvertSort(_e, _s)
440		{
441	106	}
442		FloatingPointToFPGeneric(const FloatingPointConvertSort& old)
443		: FloatingPointConvertSort(old)
444		{
445		}
446		};
447
448		/**
449		* Base type for floating-point to bit-vector conversion.
450		*/
451		class FloatingPointToBV
452		{
453		public:
454		/** Constructors. */
455	15	FloatingPointToBV(uint32_t s) : d_bv_size(s) {}
456	40	FloatingPointToBV(const FloatingPointToBV& old) : d_bv_size(old.d_bv_size) {}
457		FloatingPointToBV(const BitVectorSize& old) : d_bv_size(old) {}
458
459		/** Return the bit-width of the bit-vector to convert to. */
460	78	operator uint32_t() const { return d_bv_size; }
461
462		/** The bit-width of the bit-vector to converto to. */
463		BitVectorSize d_bv_size;
464		};
465
466		/**
467		* Conversion from floating-point to unsigned bit-vector value.
468		*/
469	6	class FloatingPointToUBV : public FloatingPointToBV
470		{
471		public:
472	6	FloatingPointToUBV(uint32_t _s) : FloatingPointToBV(_s) {}
473		FloatingPointToUBV(const FloatingPointToBV& old) : FloatingPointToBV(old) {}
474		};
475
476		/**
477		* Conversion from floating-point to signed bit-vector value.
478		*/
479	19	class FloatingPointToSBV : public FloatingPointToBV
480		{
481		public:
482	9	FloatingPointToSBV(uint32_t _s) : FloatingPointToBV(_s) {}
483		FloatingPointToSBV(const FloatingPointToBV& old) : FloatingPointToBV(old) {}
484		};
485
486		/**
487		* Conversion from floating-point to unsigned bit-vector value (total version).
488		*/
489		class FloatingPointToUBVTotal : public FloatingPointToBV
490		{
491		public:
492		FloatingPointToUBVTotal(uint32_t _s) : FloatingPointToBV(_s) {}
493		FloatingPointToUBVTotal(const FloatingPointToBV& old) : FloatingPointToBV(old)
494		{
495		}
496		};
497
498		/**
499		* Conversion from floating-point to signed bit-vector value (total version).
500		*/
501	11	class FloatingPointToSBVTotal : public FloatingPointToBV
502		{
503		public:
504		FloatingPointToSBVTotal(uint32_t _s) : FloatingPointToBV(_s) {}
505	4	FloatingPointToSBVTotal(const FloatingPointToBV& old) : FloatingPointToBV(old)
506		{
507	4	}
508		};
509
510		/**
511		* Hash function for floating-point to bit-vector conversions.
512		*/
513		template <uint32_t key>
514		struct FloatingPointToBVHashFunction
515		{
516	91	inline size_t operator()(const FloatingPointToBV& fptbv) const
517		{
518		UnsignedHashFunction< ::cvc5::BitVectorSize> f;
519	91	return (key ^ 0x46504256) ^ f(fptbv.d_bv_size);
520		}
521		}; /* struct FloatingPointToBVHashFunction */
522
523		/* Note: It is not possible to pack a number without a size to pack to,
524		* thus it is difficult to implement output stream operator overloads for
525		* FloatingPointLiteral in a sensible way. Use FloatingPoint instead. */
526
527		/** Output stream operator overloading for floating-point values. */
528		std::ostream& operator<<(std::ostream& os, const FloatingPoint& fp);
529
530		/** Output stream operator overloading for floating-point formats. */
531		std::ostream& operator<<(std::ostream& os, const FloatingPointSize& fps);
532
533		/** Output stream operator overloading for floating-point conversion sorts. */
534		std::ostream& operator<<(std::ostream& os,
535		const FloatingPointConvertSort& fpcs);
536
537		} // namespace cvc5
538
539		#endif /* CVC5__FLOATINGPOINT_H */