fp t7;
fp t6;
fp t5;
fp t4;
fp t3;
fp t2;
fp t1;
      t7 = RATIONAL(-1.0,2.0);
      t6 = RATIONAL(1.0,4.0);
      t5 = RATIONAL(1.0,2.0);
      t4 = t7*y;
      t3 = t7*x;
      t2 = t5*x;
      t1 = t5*y;
      coeffs_I->coeff_0_0 = RATIONAL(3.0,4.0)+t4+t3;
      coeffs_I->coeff_p1_0 = t6+t4+t2;
      coeffs_I->coeff_0_p1 = t3+t6+t1;
      coeffs_I->coeff_p1_p1 = t1+RATIONAL(-1.0,4.0)+t2;