Relationship between flops_sp, flops_sp_add, flops_sp_mul, and flops_sp_special

What is the relaionship between counters flops_sp, flops_sp_add, flops_sp_mul, flops_sp_fma,
and flops_sp_special?
Is the equation “flops_sp= flops_sp_add+ flops_sp_mul+ flops_sp_fma + flops_sp_special” true?

What does flops_sp_special mean? The CUPTI documentation says it is special operations, but what
are those special operations?

Thanks.