Function instr_get_rel_addr_src_idx 

pub unsafe extern "C" fn instr_get_rel_addr_src_idx(
    instr: *mut instr_t,
) -> c_int

If any of \p instr’s source operands is a rip-relative memory reference, returns the operand position. If there is no such source operand, returns -1.

\note For 64-bit DR builds only.