Botan::donna128 Class Reference

#include <donna128.h>

Public Member Functions
	donna128 (const donna128 &)=default
constexpr	donna128 (uint64_t ll=0, uint64_t hh=0)
constexpr uint64_t	hi () const
constexpr uint64_t	lo () const
constexpr	operator uint64_t () const
constexpr uint64_t	operator&= (uint64_t mask)
constexpr donna128 &	operator+= (const donna128 &x)
constexpr donna128 &	operator+= (uint64_t x)
donna128 &	operator= (const donna128 &)=default

Friends
constexpr friend uint64_t	operator& (const donna128 &x, uint64_t mask)
template<typename T>
constexpr friend donna128	operator<< (const donna128 &x, T shift)
template<typename T>
constexpr friend donna128	operator>> (const donna128 &x, T shift)

Detailed Description

Definition at line 17 of file donna128.h.

Constructor & Destructor Documentation

donna128() [1/2]

Botan::donna128::donna128 ( uint64_t ll = 0, uint64_t hh = 0 )

inlineconstexpr

Definition at line 19 of file donna128.h.

                                                           {
         l = ll;
         h = hh;
      }

Referenced by donna128(), operator&, operator+=(), operator+=(), operator<<, operator=(), and operator>>.

donna128() [2/2]

Botan::donna128::donna128 ( const donna128 & )

default

References donna128().

Member Function Documentation

hi()

uint64_t Botan::donna128::hi ( ) const

inlineconstexpr

Definition at line 91 of file donna128.h.

{ return h; }

Referenced by Botan::operator*(), Botan::operator|(), and Botan::operator|().

lo()

uint64_t Botan::donna128::lo ( ) const

inlineconstexpr

Definition at line 89 of file donna128.h.

{ return l; }

Referenced by Botan::combine_lower(), Botan::operator*(), Botan::operator|(), and Botan::operator|().

operator uint64_t()

Botan::donna128::operator uint64_t ( ) const

inlineconstexpr

Definition at line 93 of file donna128.h.

{ return l; }

operator&=()

uint64_t Botan::donna128::operator&= ( uint64_t mask )

inlineconstexpr

Definition at line 67 of file donna128.h.

                                                   {
         h = 0;
         l &= mask;
         return l;
      }

operator+=() [1/2]

donna128 & Botan::donna128::operator+= ( const donna128 & x )

inlineconstexpr

Definition at line 73 of file donna128.h.

                                                        {
         l += x.l;
         h += x.h;
 
         const uint64_t carry = CT::Mask<uint64_t>::is_lt(l, x.l).if_set_return(1);
         h += carry;
         return *this;
      }

References Botan::carry(), donna128(), and Botan::CT::Mask< T >::is_lt().

operator+=() [2/2]

donna128 & Botan::donna128::operator+= ( uint64_t x )

inlineconstexpr

Definition at line 82 of file donna128.h.

                                                 {
         l += x;
         const uint64_t carry = CT::Mask<uint64_t>::is_lt(l, x).if_set_return(1);
         h += carry;
         return *this;
      }

References Botan::carry(), donna128(), and Botan::CT::Mask< T >::is_lt().

operator=()

donna128 & Botan::donna128::operator= ( const donna128 & )

default

References donna128().

Friends And Related Symbol Documentation

operator&

friend uint64_t operator& ( const donna128 & x, uint64_t mask )

friend

Definition at line 65 of file donna128.h.

{ return x.l & mask; }

References donna128().

operator<<

template<typename T>

friend donna128 operator<< ( const donna128 & x, T shift )

friend

Definition at line 48 of file donna128.h.

                                                                       {
         donna128 z = x;
         if(shift > 64) {
            z.h = z.l << (shift - 64);
            z.l = 0;
         } else if(shift == 64) {
            z.h = z.l;
            z.l = 0;
         } else if(shift > 0) {
            const uint64_t carry = z.l >> static_cast<size_t>(64 - shift);
            z.l = (z.l << shift);
            z.h = (z.h << shift) | carry;
         }
 
         return z;
      }

References Botan::carry(), and donna128().

operator>>

template<typename T>

friend donna128 operator>> ( const donna128 & x, T shift )

friend

Definition at line 28 of file donna128.h.

                                                                       {
         donna128 z = x;
 
         if(shift > 64) {
            z.l = z.h >> (shift - 64);
            z.h = 0;
         } else if(shift == 64) {
            z.l = z.h;
            z.h = 0;
         } else if(shift > 0) {
            const uint64_t carry = z.h << static_cast<size_t>(64 - shift);
            z.h >>= shift;
            z.l >>= shift;
            z.l |= carry;
         }
 
         return z;
      }

References Botan::carry(), and donna128().

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

• src/lib/utils/donna128.h