Layer-wise Structure of the KV Cache

A large language model processes an input prompt, denoted as x, using a function Dec_kv(x) as part of its inference process. This function utilizes the model's standard decoding network but is configured for a specific preparatory task. Based on this context, what is the primary output of the Dec_kv(x) function?

In the context of prefilling a Key-Value cache for an input prompt, the function Dec_kv(·) represents a neural network with a fundamentally different architecture than the standard decoding network, Dec(·), as it is specialized solely for computing key-value pairs.

Relationship Between Decoding Networks for Inference