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Exploring Design Space of VLIW Architectures
Samos, Greece July 23-July 25
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/ASAP.2005.332005 IEEE International Conference on ...
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Giuseppe Ascia, Dipartimento di Ingegneria Informatica e delle Telecomunicazioni Universit`a di Catania, Italy
Vincenzo Catania, Dipartimento di Ingegneria Informatica e delle Telecomunicazioni Universit`a di Catania, Italy
Maurizio Palesi, Dipartimento di Ingegneria Informatica e delle Telecomunicazioni Universit`a di Catania, Italy
Davide Patti, Dipartimento di Ingegneria Informatica e delle Telecomunicazioni Universit`a di Catania, Italy

Architectures based on Very Long Instruction Word (VLIW( have found fertile ground in multimedia electronic appliances thanks to their ability to exploit high degrees of Instruction Level Parallelism (ILP) with a reasonable tradeoff in complexity and silicon costs. Effective compiler support for predicated execution using the hyperblock, drastically increases the ILP even for control-dominated applications in which the branch instruction frequency is very high. The use of these techniques, however, is known to increase the instruction footprint, consequently putting pressure on the memory hierarchy. In this paper we evaluate the performance/power trade-off in a system comprising a VLIW processor and a two-level hierarchical memory subsystem. Via simulation we show that the ef?ciency of a compiler that is able to exploit predicate execution by hyperblock formation is greatly affected by the con?guration of the memory subsystem as well as the con?gurable processor parameters. The enabling or disabling of hyperblock formation should therefore not be evaluated separately or independently, but seen as a further free parameter to be tuned in a strategy of design space exploration.

Citation:
Giuseppe Ascia, Vincenzo Catania, Maurizio Palesi, Davide Patti, "Exploring Design Space of VLIW Architectures," asap, pp.86-91, 2005 IEEE International Conference on Application-Specific Systems, Architecture Processors (ASAP'05), 2005
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