276 bc_is_zero (bc_num num)  in bc_is_zero()  function
778   m1zero = bc_is_zero(u1) || bc_is_zero(v1);  in _bc_rec_mul()
796   if (bc_is_zero(d1) || bc_is_zero(d2))  in _bc_rec_mul()
801   if (bc_is_zero(u0) || bc_is_zero(v0))  in _bc_rec_mul()
856   if (bc_is_zero (pval))  in bc_multiply()
918   if (bc_is_zero (n2)) return -1;  in bc_divide()
1079   if (bc_is_zero (qval)) qval->n_sign = PLUS;  in bc_divide()
1106   if (bc_is_zero (num2)) return -1;  in bc_divmod()
1150   if (bc_is_zero(mod)) return -1;  in bc_raisemod()
1176   while ( !bc_is_zero(exponent) )  in bc_raisemod()
1179       if ( !bc_is_zero(parity) )  in bc_raisemod()
1424   if (bc_is_zero (num))  in bc_out_num()
1437 	if (leading_zero && bc_is_zero (num))  in bc_out_num()
1451 	if (leading_zero && bc_is_zero (num))  in bc_out_num()
1471 	while (!bc_is_zero (int_part))  in bc_out_num()