Hi folks:

 in flollowing comment of tcg.h, it says every helper max need 6 input argument 
and 1 output argument,
but why here both multiply by 2  in here?  


what  is the 14 mean?


thank  you!


 520 /* While we limit helpers to 6 arguments, for 32-bit hosts, with padding,

 521    this imples a max of 6*2 (64-bit in) + 2 (64-bit out) = 14 operands.    
                                                                                
                               

 522    There are never more than 2 outputs, which means that we can store all

 523    dead + sync data within 16 bits.  */

 524 #define DEAD_ARG  4


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