subtract()

void CoefficientRingZZp::subtract ( elem & result, elem a, elem b ) const

inline

Definition at line 172 of file coeffrings.hpp.

  {
    if (b == zero)
      result = a;
    else if (a == zero)
      result = modulus_add(b, minus_one, p1);
    else
      {
        int n = modulus_sub(exp_table[a], exp_table[b], p);
        result = log_table[n];
      }
  }

References exp_table, log_table, minus_one, modulus_add(), modulus_sub(), p, p1, result(), and zero.

Referenced by subtract_multiple().