Each element of the result is TRUE
(all bits = 1) if the corresponding element of arg1
is less than the corresponding element of arg2.
Otherwise the element is FALSE (all bits = 0).

arg1 and arg2 

vector bool char 
vector unsigned char 

vector bool char 
vector signed char 

vector bool short 
vector unsigned short 

vector bool short 
vector signed short 

vector bool long 
vector unsigned long 

vector bool long 
vector signed long 

vector bool long 
vector float 
