INSERT OPERATION

The insert operation inserts a new value into a set of bits. This is done by first masking bits and then O ring them with required value. For illustration, suppose that an A register have eight bits, 0110 1010 to replace the four leftmost bits by value 1001 we first four unwanted bits:-

 0110 1010 A before

 0000 1111 B (mask)

 0000 1010 A after masking

And then insert new value:-

 0000 1010 A before

 1001 0000 B (insert)

 1001 1010 A after insertion

mask  operation  is  an  AND  microoperation  and insert  operation  is  an  OR microoperation.