X-Sim: An Accurate and Scalable Simulator for Memristive Computing-in-Memory Accelerators. - Konstantinos Stavrakakis; Bas Smeele; Emmanouil Arapidis; Theofilos Spyrou; Anteneh Gebregiorgis; Stephan Wong; Georgi Gaydadjiev; Said Hamdioui (DATE, 2026)