sc_unsigned.cpp

system C源码 一种替代verilog的语言

operator==(const sc_unsigned& u, const sc_unsigned& v)
{
  if (&u == &v)
    return true;
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       v.sgn, v.nbits, v.ndigits, v.digit) != 0)
    return false;
  return true;
}


bool
operator==(const sc_unsigned& u, const sc_signed& v)
{
  if (v.sgn == SC_NEG)
    return false;
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       v.sgn, v.nbits, v.ndigits, v.digit, 0, 1) != 0)
    return false;
  return true;
}


bool
operator==(const sc_signed& u, const sc_unsigned& v)
{
  if (u.sgn == SC_NEG)
    return false;
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       v.sgn, v.nbits, v.ndigits, v.digit, 1, 0) != 0)
    return false;
  return true;
}


bool
operator==(const sc_unsigned& u, int64 v)
{
  if (v < 0)
    return false;
  CONVERT_INT64(v);
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       vs, BITS_PER_UINT64, DIGITS_PER_UINT64, vd) != 0)
    return false;
  return true;
}


bool
operator==(int64 u, const sc_unsigned& v)
{
  if (u < 0)
    return false;
  CONVERT_INT64(u);
  if (compare_unsigned(us, BITS_PER_UINT64, DIGITS_PER_UINT64, ud,
                       v.sgn, v.nbits, v.ndigits, v.digit) != 0)
    return false;
  return true;
}


bool
operator==(const sc_unsigned& u, uint64 v)
{
  CONVERT_INT64(v);
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       vs, BITS_PER_UINT64, DIGITS_PER_UINT64, vd) != 0)
    return false;
  return true;
}


bool
operator==(uint64 u, const sc_unsigned& v)
{
  CONVERT_INT64(u);
  if (compare_unsigned(us, BITS_PER_UINT64, DIGITS_PER_UINT64, ud,
                       v.sgn, v.nbits, v.ndigits, v.digit) != 0)
    return false;
  return true;
}


bool
operator==(const sc_unsigned& u, long v)
{
  if (v < 0)
    return false;
  CONVERT_LONG(v);
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       vs, BITS_PER_ULONG, DIGITS_PER_ULONG, vd) != 0)
    return false;
  return true;
}


bool
operator==(long u, const sc_unsigned& v)
{
  if (u < 0)
    return false;
  CONVERT_LONG(u);
  if (compare_unsigned(us, BITS_PER_ULONG, DIGITS_PER_ULONG, ud,
                       v.sgn, v.nbits, v.ndigits, v.digit) != 0)
    return false;
  return true;
}


bool
operator==(const sc_unsigned& u, unsigned long v)
{
  CONVERT_LONG(v);
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       vs, BITS_PER_ULONG, DIGITS_PER_ULONG, vd) != 0)
    return false;
  return true;
}


bool
operator==(unsigned long u, const sc_unsigned& v)
{
  CONVERT_LONG(u);
  if (compare_unsigned(us, BITS_PER_ULONG, DIGITS_PER_ULONG, ud,
                       v.sgn, v.nbits, v.ndigits, v.digit) != 0)
    return false;
  return true;
}


// ----------------------------------------------------------------------------
//  SECTION: NOT_EQUAL operator: !=
// ----------------------------------------------------------------------------

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


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

// The rest of the operators in this section are included from sc_nbcommon.cpp.


// ----------------------------------------------------------------------------
//  SECTION: LESS THAN operator: <
// ----------------------------------------------------------------------------

bool
operator<(const sc_unsigned& u, const sc_unsigned& v)
{
  if (&u == &v)
    return false;
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       v.sgn, v.nbits, v.ndigits, v.digit) < 0)
    return true;
  return false;
}


bool
operator<(const sc_unsigned& u, const sc_signed& v)
{
  if (v.sgn == SC_NEG)
    return false;
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       v.sgn, v.nbits, v.ndigits, v.digit, 0, 1) < 0)
    return true;
  return false;
}


bool
operator<(const sc_signed& u, const sc_unsigned& v)
{
  if (u.sgn == SC_NEG)
    return true;
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       v.sgn, v.nbits, v.ndigits, v.digit, 1, 0) < 0)
    return true;
  return false;
}


bool
operator<(const sc_unsigned& u, int64 v)
{
  if (v < 0)
    return false;
  CONVERT_INT64(v);
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       vs, BITS_PER_UINT64, DIGITS_PER_UINT64, vd) < 0)
    return true;
  return false;
}


bool
operator<(int64 u, const sc_unsigned& v)
{
  if (u < 0)
    return true;
  CONVERT_INT64(u);
  if (compare_unsigned(us, BITS_PER_UINT64, DIGITS_PER_UINT64, ud,
                       v.sgn, v.nbits, v.ndigits, v.digit) < 0)
    return true;
  return false;
}


bool
operator<(const sc_unsigned& u, uint64 v)
{
  CONVERT_INT64(v);
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       vs, BITS_PER_UINT64, DIGITS_PER_UINT64, vd) < 0)
    return true;
  return false;
}


bool
operator<(uint64 u, const sc_unsigned& v)
{
  CONVERT_INT64(u);
  if (compare_unsigned(us, BITS_PER_UINT64, DIGITS_PER_UINT64, ud,
                       v.sgn, v.nbits, v.ndigits, v.digit) < 0)
    return true;
  return false;    
}


bool
operator<(const sc_unsigned& u, long v)
{
  if (v < 0)
    return false;
  CONVERT_LONG(v);
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       vs, BITS_PER_ULONG, DIGITS_PER_ULONG, vd) < 0)
    return true;
  return false;
}


bool
operator<(long u, const sc_unsigned& v)
{
  if (u < 0)
    return true;
  CONVERT_LONG(u);
  if (compare_unsigned(us, BITS_PER_ULONG, DIGITS_PER_ULONG, ud,
                       v.sgn, v.nbits, v.ndigits, v.digit) < 0)
    return true;
  return false;
}


bool
operator<(const sc_unsigned& u, unsigned long v)
{
  CONVERT_LONG(v);
  if (compare_unsigned(u.sgn, u.nbits, u.ndigits, u.digit, 
                       vs, BITS_PER_ULONG, DIGITS_PER_ULONG, vd) < 0)
    return true;
  return false;
}


bool
operator<(unsigned long u, const sc_unsigned& v)
{
  CONVERT_LONG(u);
  if (compare_unsigned(us, BITS_PER_ULONG, DIGITS_PER_ULONG, ud,
                       v.sgn, v.nbits, v.ndigits, v.digit) < 0)
    return true;
  return false;    
}


// ----------------------------------------------------------------------------
//  SECTION: LESS THAN or EQUAL operator: <=
// ----------------------------------------------------------------------------

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


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

// The rest of the operators in this section are included from sc_nbcommon.cpp.


// ----------------------------------------------------------------------------
//  SECTION: GREATER THAN operator: >
// ----------------------------------------------------------------------------

bool
operator>(const sc_unsigned& u, const sc_signed& v)
{
  return (! (operator<=(u, v)));
}


bool
operator>(const sc_signed& u, const sc_unsigned& v)
{
  return (! (operator<=(u, v)));
}

// The rest of the operators in this section are included from sc_nbcommon.cpp.


// ----------------------------------------------------------------------------
//  SECTION: GREATER THAN or EQUAL operator: >=
// ----------------------------------------------------------------------------

bool
operator>=(const sc_unsigned& u, const sc_signed& v)
{
  return (! (operator<(u, v)));
}


bool
operator>=(const sc_signed& u, const sc_unsigned& v)
{
  return (! (operator<(u, v)));
}

// The rest of the operators in this section are included from sc_nbcommon.cpp.


// ----------------------------------------------------------------------------
//  SECTION: Friends 
// ----------------------------------------------------------------------------

// Compare u and v as unsigned and return r
//  r = 0 if u == v
//  r < 0 if u < v
//  r > 0 if u > v

int
compare_unsigned(small_type us, 
                 int unb, int und, const sc_digit *ud, 
                 small_type vs, 
                 int vnb, int vnd, const sc_digit *vd,
                 small_type if_u_signed, 
                 small_type if_v_signed)
{

  if (us == vs) {

    if (us == SC_ZERO)
      return 0;

    else {

      int cmp_res = vec_skip_and_cmp(und, ud, vnd, vd);

      if (us == SC_POS)
        return cmp_res;
      else
        return -cmp_res;

    }
  }
  else {

    if (us == SC_ZERO)
      return -vs;

    if (vs == SC_ZERO)
      return us;

    int cmp_res;

    int nd = (us == SC_NEG ? und : vnd);

#ifdef SC_MAX_NBITS
    sc_digit d[MAX_NDIGITS];
#else
    sc_digit *d = new sc_digit[nd];
#endif

    if (us == SC_NEG) {

      vec_copy(nd, d, ud);
      vec_complement(nd, d);
      trim(if_u_signed, unb, nd, d);
      cmp_res = vec_skip_and_cmp(nd, d, vnd, vd);

    }
    else {

      vec_copy(nd, d, vd);
      vec_complement(nd, d);
      trim(if_v_signed, vnb, nd, d);
      cmp_res = vec_skip_and_cmp(und, ud, nd, d);

    }

#ifndef SC_MAX_NBITS
    delete [] d;
#endif

    return cmp_res;

  }
}


// ----------------------------------------------------------------------------
//  SECTION: Public members - Other utils.
// ----------------------------------------------------------------------------

bool 
sc_unsigned::iszero() const
{
  if (sgn == SC_ZERO)
    return true;

  else if (sgn == SC_NEG) {

    // A negative unsigned number can be zero, e.g., -16 in 4 bits, so
    // check that.

#ifdef SC_MAX_NBITS
    sc_digit d[MAX_NDIGITS];
#else
    sc_digit *d = new sc_digit[ndigits];
#endif

    vec_copy(ndigits, d, digit);
    vec_complement(ndigits, d);
    trim_unsigned(nbits, ndigits, d);

    bool res = check_for_zero(ndigits, d);

#ifndef SC_MAX_NBITS
    delete [] d;
#endif

    return res;
    
  }
  else
    return false;
}

// The rest of the utils in this section are included from sc_nbcommon.cpp.


// ----------------------------------------------------------------------------
//  SECTION: Private members.
// ----------------------------------------------------------------------------

// The private members in this section are included from
// sc_nbcommon.cpp.

#define CLASS_TYPE sc_unsigned
#define CLASS_TYPE_STR "sc_unsigned"

#define ADD_HELPER add_unsigned_friend
#define SUB_HELPER sub_unsigned_friend
#define MUL_HELPER mul_unsigned_friend
#define DIV_HELPER div_unsigned_friend
#define MOD_HELPER mod_unsigned_friend
#define AND_HELPER and_unsigned_friend
#define  OR_HELPER  or_unsigned_friend
#define XOR_HELPER xor_unsigned_friend 

#include "sc_nbfriends.inc"

#undef  SC_SIGNED
#define SC_UNSIGNED
#define IF_SC_SIGNED              0  // 0 = sc_unsigned
#define CLASS_TYPE_SUBREF         sc_unsigned_subref_r
#define OTHER_CLASS_TYPE          sc_signed
#define OTHER_CLASS_TYPE_SUBREF   sc_signed_subref_r

#define MUL_ON_HELPER mul_on_help_unsigned
#define DIV_ON_HELPER div_on_help_unsigned
#define MOD_ON_HELPER mod_on_help_unsigned

#include "sc_nbcommon.inc"

#undef MOD_ON_HELPER
#undef DIV_ON_HELPER
#undef MUL_ON_HELPER

#undef OTHER_CLASS_TYPE_SUBREF
#undef OTHER_CLASS_TYPE
#undef CLASS_TYPE_SUBREF
#undef IF_SC_SIGNED
#undef SC_UNSIGNED

#undef XOR_HELPER
#undef  OR_HELPER
#undef AND_HELPER
#undef MOD_HELPER
#undef DIV_HELPER
#undef MUL_HELPER
#undef SUB_HELPER
#undef ADD_HELPER

#undef CLASS_TYPE
#undef CLASS_TYPE_STR

#include "sc_unsigned_bitref.inc"
#include "sc_unsigned_subref.inc"

#undef CONVERT_LONG
#undef CONVERT_LONG_2
#undef CONVERT_INT64
#undef CONVERT_INT64_2

} // namespace sc_dt


// End of file.