sc_signed.cpp

system C源码 一种替代verilog的语言

sc_signed::operator = ( const sc_lv_base& v )
{
    int minlen = sc_min( nbits, v.length() );
    int i = 0;
    for( ; i < minlen; ++ i ) {
	safe_set( i, sc_logic( v.get_bit( i ) ).to_bool(), digit );
    }
    for( ; i < nbits; ++ i ) {
	safe_set( i, 0, digit );  // zero-extend
    }
    convert_2C_to_SM();
    return *this;
}


// explicit conversion to character string

const std::string
sc_signed::to_string( sc_numrep numrep ) const
{
    int len = length();
    sc_fix aa( *this, len, len, SC_TRN, SC_WRAP, 0, SC_ON );
    return aa.to_string( numrep );
}

const std::string
sc_signed::to_string( sc_numrep numrep, bool w_prefix ) const
{
    int len = length();
    sc_fix aa( *this, len, len, SC_TRN, SC_WRAP, 0, SC_ON );
    return aa.to_string( numrep, w_prefix );
}


// ----------------------------------------------------------------------------
//  SECTION: Interfacing with sc_int_base
// ----------------------------------------------------------------------------

const sc_signed&
sc_signed::operator = (const sc_int_base& v)
{ return operator=((int64) v); }


sc_signed
operator + ( const sc_unsigned& u, const sc_int_base& v )
{ return operator + ( u, SCAST<int64>( v ) ); }

sc_signed
operator + ( const sc_int_base& u, const sc_unsigned& v )
{ return operator + ( SCAST<int64>( u ), v ); }

sc_signed 
operator + (const sc_signed& u, const sc_int_base& v) 
{ return operator+(u, (int64) v); }

sc_signed 
operator + (const sc_int_base& u, const sc_signed& v) 
{ return operator+((int64) u, v); }

const sc_signed& 
sc_signed::operator += (const sc_int_base& v)
{ return operator+=((int64) v); }


sc_signed 
operator - (const sc_unsigned& u, const sc_int_base& v) 
{ return operator-(u, (int64) v); }

sc_signed 
operator - (const sc_int_base& u, const sc_unsigned& v) 
{ return operator-((int64) u, v); }

sc_signed 
operator-(const sc_signed& u, const sc_int_base& v) 
{ return operator-(u, (int64) v); }

sc_signed 
operator - (const sc_int_base& u, const sc_signed& v) 
{ return operator-((int64) u, v); }

const sc_signed& 
sc_signed::operator -= (const sc_int_base& v)
{ return operator-=((int64) v); }


sc_signed
operator * ( const sc_unsigned& u, const sc_int_base& v )
{ return operator * ( u, SCAST<int64>( v ) ); }

sc_signed
operator * ( const sc_int_base& u, const sc_unsigned& v )
{ return operator * ( SCAST<int64>( u ), v ); }

sc_signed 
operator * (const sc_signed& u, const sc_int_base& v) 
{ return operator*(u, (int64) v); }

sc_signed 
operator * (const sc_int_base& u, const sc_signed& v) 
{ return operator*((int64) u, v); }

const sc_signed& 
sc_signed::operator *= (const sc_int_base& v)
{ return operator*=((int64) v); }


sc_signed
operator / ( const sc_unsigned& u, const sc_int_base& v )
{ return operator / ( u, SCAST<int64>( v ) ); }

sc_signed
operator / ( const sc_int_base& u, const sc_unsigned& v )
{ return operator / ( SCAST<int64>( u ), v ); }

sc_signed 
operator / (const sc_signed& u, const sc_int_base& v) 
{ return operator/(u, (int64) v); }

sc_signed 
operator / (const sc_int_base& u, const sc_signed& v) 
{ return operator/((int64) u, v); }

const sc_signed& 
sc_signed::operator /= (const sc_int_base& v)
{ return operator/=((int64) v); }


sc_signed
operator % ( const sc_unsigned& u, const sc_int_base& v )
{ return operator % ( u, SCAST<int64>( v ) ); }

sc_signed
operator % ( const sc_int_base& u, const sc_unsigned& v )
{ return operator % ( SCAST<int64>( u ), v ); }

sc_signed 
operator % (const sc_signed& u, const sc_int_base& v) 
{ return operator%(u, (int64) v); }

sc_signed 
operator % (const sc_int_base& u, const sc_signed& v) 
{ return operator%((int64) u, v); }

const sc_signed& 
sc_signed::operator %= (const sc_int_base& v)
{ return operator%=((int64) v); }


sc_signed
operator & ( const sc_unsigned& u, const sc_int_base& v )
{ return operator & ( u, SCAST<int64>( v ) ); }

sc_signed
operator & ( const sc_int_base& u, const sc_unsigned& v )
{ return operator & ( SCAST<int64>( u ), v ); }

sc_signed 
operator & (const sc_signed& u, const sc_int_base& v) 
{ return operator&(u, (int64) v); }

sc_signed 
operator & (const sc_int_base& u, const sc_signed& v) 
{ return operator&((int64) u, v); }

const sc_signed& 
sc_signed::operator &= (const sc_int_base& v)
{ return operator&=((int64) v); }


sc_signed
operator | ( const sc_unsigned& u, const sc_int_base& v )
{ return operator | ( u, SCAST<int64>( v ) ); }

sc_signed
operator | ( const sc_int_base& u, const sc_unsigned& v )
{ return operator | ( SCAST<int64>( u ), v ); }

sc_signed 
operator | (const sc_signed& u, const sc_int_base& v) 
{ return operator|(u, (int64) v); }

sc_signed 
operator | (const sc_int_base& u, const sc_signed& v) 
{ return operator|((int64) u, v); }

const sc_signed& 
sc_signed::operator |= (const sc_int_base& v)
{ return operator|=((int64) v); }


sc_signed
operator ^ ( const sc_unsigned& u, const sc_int_base& v )
{ return operator ^ ( u, SCAST<int64>( v ) ); }

sc_signed
operator ^ ( const sc_int_base& u, const sc_unsigned& v )
{ return operator ^ ( SCAST<int64>( u ), v ); }

sc_signed 
operator ^ (const sc_signed& u, const sc_int_base& v) 
{ return operator^(u, (int64) v); }

sc_signed 
operator ^ (const sc_int_base& u, const sc_signed& v) 
{ return operator^((int64) u, v); }

const sc_signed& 
sc_signed::operator ^= (const sc_int_base& v)
{ return operator^=((int64) v); }


sc_signed 
operator << (const sc_signed& u, const sc_int_base& v)
{ return operator<<(u, (int64) v); }

const sc_signed& 
sc_signed::operator <<= (const sc_int_base& v)
{ return operator<<=((int64) v); }


sc_signed 
operator >> (const sc_signed&    u, const sc_int_base&  v)
{ return operator>>(u, (int64) v); }

const sc_signed& 
sc_signed::operator >>= (const sc_int_base&  v)
{ return operator>>=((int64) v); }


bool 
operator == (const sc_signed& u, const sc_int_base& v)
{ return operator==(u, (int64) v); }

bool 
operator == (const sc_int_base& u, const sc_signed& v) 
{ return operator==((int64) u, v); }


bool 
operator != (const sc_signed& u, const sc_int_base& v)
{ return operator!=(u, (int64) v); }

bool 
operator != (const sc_int_base& u, const sc_signed& v) 
{ return operator!=((int64) u, v); }


bool 
operator < (const sc_signed& u, const sc_int_base& v)
{ return operator<(u, (int64) v); }

bool 
operator < (const sc_int_base& u, const sc_signed& v) 
{ return operator<((int64) u, v); }


bool 
operator <= (const sc_signed& u, const sc_int_base& v)
{ return operator<=(u, (int64) v); }

bool
operator <= (const sc_int_base& u, const sc_signed& v) 
{ return operator<=((int64) u, v); }


bool 
operator > (const sc_signed& u, const sc_int_base& v)
{ return operator>(u, (int64) v); }

bool 
operator > (const sc_int_base& u, const sc_signed& v) 
{ return operator>((int64) u, v); }


bool 
operator >= (const sc_signed& u, const sc_int_base& v)
{ return operator>=(u, (int64) v); }

bool 
operator >= (const sc_int_base& u, const sc_signed& v) 
{ return operator>=((int64) u, v); }


// ----------------------------------------------------------------------------
//  SECTION: Interfacing with sc_uint_base
// ----------------------------------------------------------------------------

const sc_signed&
sc_signed::operator = (const sc_uint_base& v)
{ return operator=((uint64) v); }


sc_signed
operator + (const sc_signed& u, const sc_uint_base& v) 
{ return operator+(u, (uint64) v); }

sc_signed
operator + (const sc_uint_base& u, const sc_signed& v) 
{ return operator+((uint64) u, v); }

const sc_signed&
sc_signed::operator += (const sc_uint_base& v)
{ return operator+=((uint64) v); }


sc_signed
operator - (const sc_unsigned& u, const sc_uint_base& v) 
{ return operator-(u, (uint64) v); }

sc_signed
operator - (const sc_uint_base& u, const sc_unsigned& v) 
{ return operator-((uint64) u, v); }

sc_signed
operator - (const sc_signed& u, const sc_uint_base& v) 
{ return operator-(u, (uint64) v); }

sc_signed
operator - (const sc_uint_base& u, const sc_signed& v) 
{ return operator-((uint64) u, v); }

const sc_signed&
sc_signed::operator -= (const sc_uint_base& v)
{ return operator-=((uint64) v); }


sc_signed 
operator * (const sc_signed& u, const sc_uint_base& v) 
{ return operator*(u, (uint64) v); }

sc_signed 
operator * (const sc_uint_base& u, const sc_signed& v) 
{ return operator*((uint64) u, v); }

const sc_signed& 
sc_signed::operator *= (const sc_uint_base& v)
{ return operator*=((uint64) v); }


sc_signed
operator / (const sc_signed& u, const sc_uint_base& v) 
{ return operator/(u, (uint64) v); }

sc_signed
operator / (const sc_uint_base& u, const sc_signed& v) 
{ return operator/((uint64) u, v); }

const sc_signed&
sc_signed::operator /= (const sc_uint_base& v)
{ return operator/=((uint64) v); }


sc_signed 
operator % (const sc_signed& u, const sc_uint_base& v) 
{ return operator%(u, (uint64) v); }

sc_signed 
operator % (const sc_uint_base& u, const sc_signed& v) 
{ return operator%((uint64) u, v); }

const sc_signed& 
sc_signed::operator %= (const sc_uint_base& v)
{ return operator%=((uint64) v); }


sc_signed 
operator & (const sc_signed& u, const sc_uint_base& v) 
{ return operator&(u, (uint64) v); }

sc_signed 
operator & (const sc_uint_base& u, const sc_signed& v) 
{ return operator&((uint64) u, v); }

const sc_signed& 
sc_signed::operator &= (const sc_uint_base& v)
{ return operator&=((uint64) v); }


sc_signed 
operator | (const sc_signed& u, const sc_uint_base& v) 
{ return operator|(u, (uint64) v); }

sc_signed 
operator | (const sc_uint_base& u, const sc_signed& v) 
{ return operator|((uint64) u, v); }

const sc_signed& 
sc_signed::operator |= (const sc_uint_base& v)
{ return operator|=((uint64) v); }


sc_signed 
operator ^ (const sc_signed& u, const sc_uint_base& v) 
{ return operator^(u, (uint64) v); }

sc_signed 
operator ^ (const sc_uint_base& u, const sc_signed& v) 
{ return operator^((uint64) u, v); }

const sc_signed& 
sc_signed::operator ^= (const sc_uint_base& v)
{ return operator^=((uint64) v); }


sc_signed 
operator << (const sc_signed& u, const sc_uint_base& v)
{ return operator<<(u, (uint64) v); }

const sc_signed& 
sc_signed::operator <<= (const sc_uint_base& v)
{ return operator<<=((uint64) v); }


sc_signed
operator >> (const sc_signed&    u, const sc_uint_base&  v)
{ return operator>>(u, (uint64) v); }

const sc_signed& 
sc_signed::operator >>= (const sc_uint_base&  v)
{ return operator>>=((uint64) v); }


bool 
operator == (const sc_signed& u, const sc_uint_base& v)
{ return operator==(u, (uint64) v); }

bool 
operator == (const sc_uint_base& u, const sc_signed& v) 
{ return operator==((uint64) u, v); }


bool 
operator != (const sc_signed& u, const sc_uint_base& v)
{ return operator!=(u, (uint64) v); }

bool 
operator != (const sc_uint_base& u, const sc_signed& v) 
{ return operator!=((uint64) u, v); }


bool 
operator < (const sc_signed& u, const sc_uint_base& v)
{ return operator<(u, (uint64) v); }

bool 
operator < (const sc_uint_base& u, const sc_signed& v) 
{ return operator<((uint64) u, v); }


bool 
operator <= (const sc_signed& u, const sc_uint_base& v)
{ return operator<=(u, (uint64) v); }

bool 
operator <= (const sc_uint_base& u, const sc_signed& v) 
{ return operator<=((uint64) u, v); }


bool 
operator > (const sc_signed& u, const sc_uint_base& v)
{ return operator>(u, (uint64) v); }

bool 
operator > (const sc_uint_base& u, const sc_signed& v) 
{ return operator>((uint64) u, v); }


bool 
operator >= (const sc_signed& u, const sc_uint_base& v)
{ return operator>=(u, (uint64) v); }

bool 
operator >= (const sc_uint_base& u, const sc_signed& v) 
{ return operator>=((uint64) u, v); }


// ----------------------------------------------------------------------------
//  SECTION: Input and output operators
// ----------------------------------------------------------------------------

// Operators in this section are included from sc_nbcommon.cpp.


// ----------------------------------------------------------------------------
//  SECTION: Operator macros.
// ----------------------------------------------------------------------------

#define CONVERT_LONG(u) \
small_type u ## s = get_sign(u);                        \
sc_digit u ## d[DIGITS_PER_ULONG];                    \
from_uint(DIGITS_PER_ULONG, u ## d, (unsigned long) u); 

#define CONVERT_LONG_2(u) \
sc_digit u ## d[DIGITS_PER_ULONG];                     \
from_uint(DIGITS_PER_ULONG, u ## d, (unsigned long) u); 

#define CONVERT_INT(u) \
small_type u ## s = get_sign(u);                        \
sc_digit u ## d[DIGITS_PER_UINT];                    \
from_uint(DIGITS_PER_UINT, u ## d, (unsigned int) u); 

#define CONVERT_INT_2(u) \
sc_digit u ## d[DIGITS_PER_UINT];                     \
from_uint(DIGITS_PER_UINT, u ## d, (unsigned int) u); 

#define CONVERT_INT64(u) \
small_type u ## s = get_sign(u);                   \
sc_digit u ## d[DIGITS_PER_UINT64];              \
from_uint(DIGITS_PER_UINT64, u ## d, (uint64) u); 

#define CONVERT_INT64_2(u) \
sc_digit u ## d[DIGITS_PER_UINT64];              \
from_uint(DIGITS_PER_UINT64, u ## d, (uint64) u); 


// ----------------------------------------------------------------------------
//  SECTION: PLUS operators: +, +=, ++
// ----------------------------------------------------------------------------

// Cases to consider when computing u + v:
// 1. 0 + v = v
// 2. u + 0 = u
// 3. if sgn(u) == sgn(v)
//    3.1 u + v = +(u + v) = sgn(u) * (u + v) 
//    3.2 (-u) + (-v) = -(u + v) = sgn(u) * (u + v)
// 4. if sgn(u) != sgn(v)
//    4.1 u + (-v) = u - v = sgn(u) * (u - v)
//    4.2 (-u) + v = -(u - v) ==> sgn(u) * (u - v)
//
// Specialization of above cases for computing ++u or u++: 
// 1. 0 + 1 = 1
// 3. u + 1 = u + 1 = sgn(u) * (u + 1)
// 4. (-u) + 1 = -(u - 1) = sgn(u) * (u - 1)

sc_signed
operator+(const sc_unsigned& u, const sc_signed& v)
{

  if (u.sgn == SC_ZERO) // case 1
    return sc_signed(v);

  if (v.sgn == SC_ZERO) // case 2
    return sc_signed(u);

  // cases 3 and 4
  return add_signed_friend(u.sgn, u.nbits, u.ndigits, u.digit,
                           v.sgn, v.nbits, v.ndigits, v.digit);

}


sc_signed
operator+(const sc_signed& u, const sc_unsigned& v)
{

  if (u.sgn == SC_ZERO) // case 1
    return sc_signed(v);

  if (v.sgn == SC_ZERO) // case 2
    return sc_signed(u);

  // cases 3 and 4
  return add_signed_friend(u.sgn, u.nbits, u.ndigits, u.digit,
                           v.sgn, v.nbits, v.ndigits, v.digit);

}


sc_signed
operator+(const sc_signed& u, const sc_signed& v)
{