ISA Extensions for High-Radix Online Floating-Point Addition

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Provided by: University of California, Los Angeles (Anderson)
Topic: Hardware
Format: PDF
ISA extensions for DLX type architectures are proposed to perform high radix online floating point addition on fixed point units with extended feature sets. Online arithmetic allows most significant digit first computation of results, allowing overlapped execution of dependent operations and offers greater instruction scheduling opportunities than software implementations of conventional floating point addition. In this paper, the authors seek an ISA formulation to find a middle ground between full hardware floating point addition units and software implementations strictly based on available ALU logic.
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