Is it possible to design an expanding opcode

Next Previous. Related Questions. Design an expanding opcode to allow all the following to be encoded in a bit instruction: 7 instructions with two bit addresses and one 3-bit register number instructions with one bit address and one 3-bit register number 40 instructions Given bit instructions and assuming we have 16 registers, show the encoding to demonstrate how it is possible to use expanding opcodes to allow the following: 12 instructions with 2 register operands 12 instructions with 1 register operand The MP has a limited set of instructions, however provides enough capabilities to control a microwave oven or some other consumer appliances.

MP can access 64Kx8 memory. Computer architecture X uses variable-length instructions of several different formats, each occupying a whole number of bytes or a number of bits that is a multiple of 8.

Format 1 begins with four flag bits, followed by a 0 bit, followed by an A: Note: This code should be rewritten instead of copying to the compiler otherwise it will throw a com Q: Write a C program that takes marks of students in four labs and store these marks in a two-dimension A: The program reads the number of students from the user and each student exam mark is maximum is 4. Why are so many components needed for the replication process? From a security aspect, who can The Task data is: id, title, status, added by, creation date.

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It looks like this is simply the problem of mapping a set of possible values i. If they can have different lengths, usually you'll want them to form a prefix-free encoding no encoded value is a prefix of any other.

If all instruction encodings must have the same length,any mapping that gives different instructions different encodings is acceptable. Your solution doesn't look OK to me. Editorial comment: the exercise is a bit boring and trivial, and doesn't involve much in the way of deep concepts.

It's just a matter of "bit-packing". When designing a variable-length opcode you are doing the equivalent of Huffman coding. In the case that the opcodes have known, independent, and identically distributed probabilities then Huffman coding gives you the optimal symbol-by-symbol prefix code.

As DW points out, what you need here is a prefix code. A code such that no opcode is the prefix of any other opcode. Prefix codes are equivalent to binary trees where each leaf of the tree is an opcode. So take any tree with the correct number of leaves, label each leaf with an operation, then the opcode for each operation is the path from the root to the leaf.

Where "going left" in the path is a "0" and "going right" in the path is a "1". If you know the probabilities of the operations you are encoding then you can create a Huffman tree by keeping a priority queue of nodes, where the "priority" here is the probability of the node.

You start with the queue filled with the leaves operations , each with its probability. Computer Science. Electrical Engineering. Mechanical Engineering. Advanced Math. Advanced Physics. Anatomy and Physiology. Earth Science. Social Science. Political Science. Literature Guides. Popular Textbooks. Want to see the step-by-step answer? Want to see this answer and more?

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