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float_utilst Class Reference

#include <float_utils.h>

+ Inheritance diagram for float_utilst:
+ Collaboration diagram for float_utilst:

Classes

struct  biased_floatt
 
struct  rounding_mode_bitst
 
struct  unbiased_floatt
 
struct  unpacked_floatt
 

Public Types

enum class  relt {
  LT , LE , EQ , GT ,
  GE
}
 

Public Member Functions

 float_utilst (propt &_prop)
 
 float_utilst (propt &_prop, const floatbv_typet &type)
 
void set_rounding_mode (const bvt &)
 
virtual ~float_utilst ()
 
bvt build_constant (const ieee_floatt &)
 
bvt get_exponent (const bvt &)
 Gets the unbiased exponent in a floating-point bit-vector.
 
bvt get_fraction (const bvt &)
 Gets the fraction without hidden bit in a floating-point bit-vector src.
 
literalt is_normal (const bvt &)
 
literalt is_zero (const bvt &)
 
literalt is_infinity (const bvt &)
 
literalt is_plus_inf (const bvt &)
 
literalt is_minus_inf (const bvt &)
 
literalt is_NaN (const bvt &)
 
virtual bvt add_sub (const bvt &src1, const bvt &src2, bool subtract)
 
bvt add (const bvt &src1, const bvt &src2)
 
bvt sub (const bvt &src1, const bvt &src2)
 
virtual bvt mul (const bvt &src1, const bvt &src2)
 
virtual bvt div (const bvt &src1, const bvt &src2)
 
virtual bvt rem (const bvt &src1, const bvt &src2)
 
bvt abs (const bvt &)
 
bvt negate (const bvt &)
 
bvt from_unsigned_integer (const bvt &)
 
bvt from_signed_integer (const bvt &)
 
bvt to_integer (const bvt &src, std::size_t int_width, bool is_signed)
 
bvt to_signed_integer (const bvt &src, std::size_t int_width)
 
bvt to_unsigned_integer (const bvt &src, std::size_t int_width)
 
bvt conversion (const bvt &src, const ieee_float_spect &dest_spec)
 
literalt relation (const bvt &src1, relt rel, const bvt &src2)
 
ieee_floatt get (const bvt &) const
 
literalt exponent_all_ones (const bvt &)
 
literalt exponent_all_zeros (const bvt &)
 
literalt fraction_all_zeros (const bvt &)
 
bvt debug1 (const bvt &op0, const bvt &op1)
 
bvt debug2 (const bvt &op0, const bvt &op1)
 

Static Public Member Functions

static literalt sign_bit (const bvt &src)
 

Public Attributes

rounding_mode_bitst rounding_mode_bits
 
ieee_float_spect spec
 

Protected Member Functions

virtual void normalization_shift (bvt &fraction, bvt &exponent)
 normalize fraction/exponent pair returns 'zero' if fraction is zero
 
void denormalization_shift (bvt &fraction, bvt &exponent)
 make sure exponent is not too small; the exponent is unbiased
 
bvt add_bias (const bvt &exponent)
 
bvt sub_bias (const bvt &exponent)
 
bvt limit_distance (const bvt &dist, mp_integer limit)
 Limits the shift distance.
 
biased_floatt bias (const unbiased_floatt &)
 takes an unbiased float, and applies the bias
 
virtual bvt rounder (const unbiased_floatt &)
 
bvt pack (const biased_floatt &)
 
unbiased_floatt unpack (const bvt &)
 
void round_fraction (unbiased_floatt &result)
 
void round_exponent (unbiased_floatt &result)
 
literalt fraction_rounding_decision (const std::size_t dest_bits, const literalt sign, const bvt &fraction)
 rounding decision for fraction using sticky bit
 
bvt subtract_exponents (const unbiased_floatt &src1, const unbiased_floatt &src2)
 Subtracts the exponents.
 
bvt sticky_right_shift (const bvt &op, const bvt &dist, literalt &sticky)
 

Protected Attributes

propt & prop
 
bv_utilst bv_utils
 

Detailed Description

Definition at line 17 of file float_utils.h.

Member Enumeration Documentation

◆ relt

enum class float_utilst::relt
strong
Enumerator
LT 
LE 
EQ 
GT 
GE 

Definition at line 138 of file float_utils.h.

Constructor & Destructor Documentation

◆ float_utilst() [1/2]

float_utilst::float_utilst ( propt & _prop)
inlineexplicit

Definition at line 69 of file float_utils.h.

◆ float_utilst() [2/2]

float_utilst::float_utilst ( propt & _prop,
const floatbv_typet & type )
inline

Definition at line 75 of file float_utils.h.

◆ ~float_utilst()

virtual float_utilst::~float_utilst ( )
inlinevirtual

Definition at line 84 of file float_utils.h.

Member Function Documentation

◆ abs()

bvt float_utilst::abs ( const bvt & src)

Definition at line 570 of file float_utils.cpp.

◆ add()

bvt float_utilst::add ( const bvt & src1,
const bvt & src2 )
inline

Definition at line 111 of file float_utils.h.

◆ add_bias()

bvt float_utilst::add_bias ( const bvt & exponent)
protected

Definition at line 1193 of file float_utils.cpp.

◆ add_sub()

bvt float_utilst::add_sub ( const bvt & src1,
const bvt & src2,
bool subtract )
virtual

Definition at line 247 of file float_utils.cpp.

◆ bias()

float_utilst::biased_floatt float_utilst::bias ( const unbiased_floatt & src)
protected

takes an unbiased float, and applies the bias

Definition at line 1163 of file float_utils.cpp.

◆ build_constant()

bvt float_utilst::build_constant ( const ieee_floatt & src)

Definition at line 139 of file float_utils.cpp.

◆ conversion()

bvt float_utilst::conversion ( const bvt & src,
const ieee_float_spect & dest_spec )

Definition at line 152 of file float_utils.cpp.

◆ debug1()

bvt float_utilst::debug1 ( const bvt & op0,
const bvt & op1 )

Definition at line 1320 of file float_utils.cpp.

◆ debug2()

bvt float_utilst::debug2 ( const bvt & op0,
const bvt & op1 )

Definition at line 1327 of file float_utils.cpp.

◆ denormalization_shift()

void float_utilst::denormalization_shift ( bvt & fraction,
bvt & exponent )
protected

make sure exponent is not too small; the exponent is unbiased

Definition at line 836 of file float_utils.cpp.

◆ div()

bvt float_utilst::div ( const bvt & src1,
const bvt & src2 )
virtual

Definition at line 464 of file float_utils.cpp.

◆ exponent_all_ones()

literalt float_utilst::exponent_all_ones ( const bvt & src)

Definition at line 711 of file float_utils.cpp.

◆ exponent_all_zeros()

literalt float_utilst::exponent_all_zeros ( const bvt & src)

Definition at line 724 of file float_utils.cpp.

◆ fraction_all_zeros()

literalt float_utilst::fraction_all_zeros ( const bvt & src)

Definition at line 737 of file float_utils.cpp.

◆ fraction_rounding_decision()

literalt float_utilst::fraction_rounding_decision ( const std::size_t dest_bits,
const literalt sign,
const bvt & fraction )
protected

rounding decision for fraction using sticky bit

Definition at line 943 of file float_utils.cpp.

◆ from_signed_integer()

bvt float_utilst::from_signed_integer ( const bvt & src)

Definition at line 32 of file float_utils.cpp.

◆ from_unsigned_integer()

bvt float_utilst::from_unsigned_integer ( const bvt & src)

Definition at line 50 of file float_utils.cpp.

◆ get()

ieee_floatt float_utilst::get ( const bvt & src) const

Definition at line 1271 of file float_utils.cpp.

◆ get_exponent()

bvt float_utilst::get_exponent ( const bvt & src)

Gets the unbiased exponent in a floating-point bit-vector.

Definition at line 685 of file float_utils.cpp.

◆ get_fraction()

bvt float_utilst::get_fraction ( const bvt & src)

Gets the fraction without hidden bit in a floating-point bit-vector src.

Definition at line 691 of file float_utils.cpp.

◆ is_infinity()

literalt float_utilst::is_infinity ( const bvt & src)

Definition at line 677 of file float_utils.cpp.

◆ is_minus_inf()

literalt float_utilst::is_minus_inf ( const bvt & src)

Definition at line 696 of file float_utils.cpp.

◆ is_NaN()

literalt float_utilst::is_NaN ( const bvt & src)

Definition at line 705 of file float_utils.cpp.

◆ is_normal()

literalt float_utilst::is_normal ( const bvt & src)

Definition at line 223 of file float_utils.cpp.

◆ is_plus_inf()

literalt float_utilst::is_plus_inf ( const bvt & src)

Definition at line 668 of file float_utils.cpp.

◆ is_zero()

literalt float_utilst::is_zero ( const bvt & src)

Definition at line 659 of file float_utils.cpp.

◆ limit_distance()

bvt float_utilst::limit_distance ( const bvt & dist,
mp_integer limit )
protected

Limits the shift distance.

Definition at line 389 of file float_utils.cpp.

◆ mul()

bvt float_utilst::mul ( const bvt & src1,
const bvt & src2 )
virtual

Definition at line 412 of file float_utils.cpp.

◆ negate()

bvt float_utilst::negate ( const bvt & src)

Definition at line 561 of file float_utils.cpp.

◆ normalization_shift()

void float_utilst::normalization_shift ( bvt & fraction,
bvt & exponent )
protectedvirtual

normalize fraction/exponent pair returns 'zero' if fraction is zero

Reimplemented in float_approximationt.

Definition at line 747 of file float_utils.cpp.

◆ pack()

bvt float_utilst::pack ( const biased_floatt & src)
protected

Definition at line 1240 of file float_utils.cpp.

◆ relation()

literalt float_utilst::relation ( const bvt & src1,
relt rel,
const bvt & src2 )

Definition at line 578 of file float_utils.cpp.

◆ rem()

bvt float_utilst::rem ( const bvt & src1,
const bvt & src2 )
virtual

Definition at line 543 of file float_utils.cpp.

◆ round_exponent()

void float_utilst::round_exponent ( unbiased_floatt & result)
protected

Definition at line 1100 of file float_utils.cpp.

◆ round_fraction()

void float_utilst::round_fraction ( unbiased_floatt & result)
protected

Definition at line 1001 of file float_utils.cpp.

◆ rounder()

bvt float_utilst::rounder ( const unbiased_floatt & src)
protectedvirtual

Definition at line 904 of file float_utils.cpp.

◆ set_rounding_mode()

void float_utilst::set_rounding_mode ( const bvt & src)

Definition at line 15 of file float_utils.cpp.

◆ sign_bit()

static literalt float_utilst::sign_bit ( const bvt & src)
inlinestatic

Definition at line 92 of file float_utils.h.

◆ sticky_right_shift()

bvt float_utilst::sticky_right_shift ( const bvt & op,
const bvt & dist,
literalt & sticky )
protected

Definition at line 1285 of file float_utils.cpp.

◆ sub()

bvt float_utilst::sub ( const bvt & src1,
const bvt & src2 )
inline

Definition at line 116 of file float_utils.h.

◆ sub_bias()

bvt float_utilst::sub_bias ( const bvt & exponent)
protected

Definition at line 1202 of file float_utils.cpp.

◆ subtract_exponents()

bvt float_utilst::subtract_exponents ( const unbiased_floatt & src1,
const unbiased_floatt & src2 )
protected

Subtracts the exponents.

Definition at line 231 of file float_utils.cpp.

◆ to_integer()

bvt float_utilst::to_integer ( const bvt & src,
std::size_t int_width,
bool is_signed )

Definition at line 81 of file float_utils.cpp.

◆ to_signed_integer()

bvt float_utilst::to_signed_integer ( const bvt & src,
std::size_t int_width )

Definition at line 67 of file float_utils.cpp.

◆ to_unsigned_integer()

bvt float_utilst::to_unsigned_integer ( const bvt & src,
std::size_t int_width )

Definition at line 74 of file float_utils.cpp.

◆ unpack()

float_utilst::unbiased_floatt float_utilst::unpack ( const bvt & src)
protected

Definition at line 1211 of file float_utils.cpp.

Member Data Documentation

◆ bv_utils

bv_utilst float_utilst::bv_utils
protected

Definition at line 155 of file float_utils.h.

◆ prop

propt& float_utilst::prop
protected

Definition at line 154 of file float_utils.h.

◆ rounding_mode_bits

rounding_mode_bitst float_utilst::rounding_mode_bits

Definition at line 67 of file float_utils.h.

◆ spec

ieee_float_spect float_utilst::spec

Definition at line 88 of file float_utils.h.

The documentation for this class was generated from the following files: