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DARTH-PUM: A Hybrid Processing-Using-Memory Architecture
Ryan Wong, B · 2026-05-06 · via cs.LG updates on arXiv.org

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Abstract:Analog processing-using-memory (PUM; a.k.a. in-memory computing) makes use of electrical interactions inside memory arrays to perform bulk matrix-vector multiplication (MVM) operations. However, many popular matrix-based kernels need to execute non-MVM operations, which analog PUM cannot directly perform. To retain its energy efficiency, analog PUM architectures augment memory arrays with CMOS-based domain-specific fixed-function hardware to provide complete kernel functionality, but the difficulty of integrating such specialized CMOS logic with memory arrays has largely limited analog PUM to being an accelerator for machine learning inference, or for closely related kernels. An opportunity exists to harness analog PUM for general-purpose computation: recent works have shown that memory arrays can also perform Boolean PUM operations, albeit with very different supporting hardware and electrical signals than analog PUM.
We propose DARTH-PUM, a general-purpose hybrid PUM architecture that tackles key hardware and software challenges to integrating analog PUM and digital PUM. We propose optimized peripheral circuitry, coordinating hardware to manage and interface between both types of PUM, an easy-to-use programming interface, and low-cost support for flexible data widths. These design elements allow us to build a practical PUM architecture that can execute kernels fully in memory, and can scale easily to cater to domains ranging from embedded applications to large-scale data-driven computing. We show how three popular applications (AES encryption, convolutional neural networks, large language models) can map to and benefit from DARTH-PUM, with speedups of 59.4x, 14.8x, and 40.8x over an analog+CPU baseline.
Comments: Appears in the 2026 ACM International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS). May the Fourth be with you
Subjects: Hardware Architecture (cs.AR); Cryptography and Security (cs.CR); Emerging Technologies (cs.ET); Machine Learning (cs.LG)
Cite as: arXiv:2602.16075 [cs.AR]
  (or arXiv:2602.16075v2 [cs.AR] for this version)
  https://doi.org/10.48550/arXiv.2602.16075

arXiv-issued DOI via DataCite

Submission history

From: Ryan Wong [view email]
[v1] Tue, 17 Feb 2026 22:57:55 UTC (1,242 KB)
[v2] Mon, 4 May 2026 20:26:14 UTC (1,242 KB)