double2_add double2_cmp double2_eq double2_set double3_add double3_cmp double3_eq double3_set double4_add double4_cmp double4_eq double4_set

double3_cmp() int double3_cmp ( const double3 *  d1, const double3 *  d2  ) Return -1, 0, or 1 depending on whether the first double3 is less than, equal, or greater than the second one.