src/systemc/dt/int/sc_unsigned_bitref.inc

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  with this work for additional information regarding copyright ownership.
  Accellera licenses this file to you under the Apache License, Version 2.0
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  implied.  See the License for the specific language governing
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/*****************************************************************************

  sc_unsigned_bitref.h -- Proxy class that is declared in sc_unsigned.h.  

  Original Author: Ali Dasdan, Synopsys, Inc.
 
 *****************************************************************************/

/*****************************************************************************

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.

      Name, Affiliation, Date:
  Description of Modification:

 *****************************************************************************/


// ----------------------------------------------------------------------------
//  CLASS : sc_unsigned_bitref_r
//
//  Proxy class for sc_unsigned bit selection (r-value only).
// ----------------------------------------------------------------------------

// implicit conversion to uint64

sc_unsigned_bitref_r::operator uint64 () const
{
    return m_obj_p->test(m_index);
}

bool
sc_unsigned_bitref_r::operator ! () const
{
    return (!m_obj_p->test(m_index));
}

bool
sc_unsigned_bitref_r::operator ~ () const
{
    return (!m_obj_p->test(m_index));
}


// ----------------------------------------------------------------------------
//  CLASS : sc_unsigned_bitref
//
//  Proxy class for sc_unsigned bit selection (r-value and l-value).
// ----------------------------------------------------------------------------

// assignment operators

const sc_unsigned_bitref &
sc_unsigned_bitref::operator = (const sc_unsigned_bitref_r &b)
{
    m_obj_p->set(m_index, (bool)b);
    return *this;
}

const sc_unsigned_bitref &
sc_unsigned_bitref::operator = (const sc_unsigned_bitref &b)
{
    m_obj_p->set(m_index, (bool)b);
    return *this;
}

const sc_unsigned_bitref &
sc_unsigned_bitref::operator = (bool b)
{
    m_obj_p->set(m_index, b);
    return *this;
}


const sc_unsigned_bitref &
sc_unsigned_bitref::operator &= (bool b)
{
    if (!b) {
        m_obj_p->clear(m_index);
    }
    return *this;
}

const sc_unsigned_bitref &
sc_unsigned_bitref::operator |= (bool b)
{
    if (b) {
        m_obj_p->set(m_index);
    }
    return *this;
}

const sc_unsigned_bitref &
sc_unsigned_bitref::operator ^= (bool b)
{
    if (b) {
        m_obj_p->invert(m_index);
    }
    return *this;
}

// #### OPTIMIZE
void
sc_unsigned_bitref::concat_set(int64 src, int low_i)
{
    bool value = 1 & ((low_i < 64) ? (src >> low_i) : (src >> 63));
    m_obj_p->set(low_i, value);
}

void
sc_unsigned_bitref::concat_set(const sc_signed &src, int low_i)
{
    if (low_i < src.length())
        m_obj_p->set(low_i, src.test(low_i));
    else
        m_obj_p->set(low_i, src < 0);
}

void
sc_unsigned_bitref::concat_set(const sc_unsigned &src, int low_i)
{       
    if (low_i < src.nbits)
        m_obj_p->set(low_i, src.test(low_i));
    else
        m_obj_p->set(low_i, 0);
}

void
sc_unsigned_bitref::concat_set(uint64 src, int low_i)
{
    bool value = ((low_i < 64) ? (src >> low_i) & 1 : 0);
    m_obj_p->set(low_i, value);
}

// other methods
void
sc_unsigned_bitref::scan(::std::istream &is)
{
    bool b;
    is >> b;
    *this = b;
}