Overview
The DEC Alpha 21264 Microprocessor is described in the available evidence as a multiple-issue, out-of-order, superscalar Alpha processor.
Functional verification reference
The provided source cites a paper by S. Taylor et al. titled “Functional Verification of a Multiple-Issue, Out-of-Order, Superscalar Alpha Processor—the DEC Alpha 21264 Microprocessor.” The paper appeared in the Proceedings of the 35th Design Automation Conference, identified as DAC 98, published by ACM Press in 1998, on pages 638–643.
Evidence scope
The available evidence is bibliographic. It supports the processor characterization above and the existence of a functional-verification publication about the DEC Alpha 21264, but it does not provide additional implementation details, performance data, instruction-set details, or design specifications.