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     The memmove and _fmemmove functions copy <count> characters from
     <src> to <dest>. If some regions of <src> and <dest> overlap, the
     memmove and _fmemmove functions ensure that the original <src>
     bytes in the overlapping region are copied before being
     overwritten.
 
     The _fmemmove function is a model-independent (large model) form
     of the memmove function and can be called from any point in any
     program.
 
     Return Value
 
     The memmove and _fmemmove functions return the value of <dest>.
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