std::experimental::simd_abi::compatible
From cppreference.com
                    
                                        
                    < cpplrm; | experimentallrm; | simd
                    
                                                            
                    | Defined in header  <experimental/simd> | ||
| namespace simd_abi {  template < class T > | ||
compatible<T> is an implementation-defined alias for an ABI tag.
Notes
The intent is to use the ABI tag producing the most efficient data-parallel execution for the element type T that ensures ABI compatibility between translation units on the target architecture.