#define isl_int_submul(r,i,j) mpz_submul(r,i,j)
#define isl_int_gcd(r,i,j) mpz_gcd(r,i,j)
-#define isl_int_gcdext(g,x,y,i,j) mpz_gcdext(g,x,y,i,j)
#define isl_int_lcm(r,i,j) mpz_lcm(r,i,j)
#define isl_int_divexact(r,i,j) mpz_divexact(r,i,j)
#define isl_int_divexact_ui(r,i,j) mpz_divexact_ui(r,i,j)