#define isl_int_addmul(r,i,j) mpz_addmul(r,i,j)
#define isl_int_addmul_ui(r,i,j) mpz_addmul_ui(r,i,j)
#define isl_int_submul(r,i,j) mpz_submul(r,i,j)
+#define isl_int_submul_ui(r,i,j) mpz_submul_ui(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)