Reversible computing

Reverse computation

Reverse computation is a software application of the concept of reversible computing. Because it offers a possible solution to the heat problem faced by chip manufacturers, reversible computing has been extensively studied in the area of computer architecture. The promise of reversible computing is that the amount of heat loss for reversible architectures would be minimal for significantly large numbers of transistors. Rather than creating entropy (and thus heat) through destructive operations, a reversible architecture conserves the energy by performing other operations that preserve the system state. The concept of reverse computation is somewhat simpler than reversible computing in that reverse computation is only required to restore the equivalent state of a software application, rather than support the reversibility of the set of all possible instructions. Reversible computing concepts have been successfully applied as reverse computation in software application areas such as database design, checkpointing and debugging, and code differentiation. (Wikipedia).

Reverse computation
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Related pages

Undo | Random number generation | Reversible computing | Modulo operation | Circular shift