Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/72822
Title: An ISA comparison between superscalar and vector processors
Authors: Quintana, Francisca 
Espasa, Roger
Valero, Mateo
UNESCO Clasification: 330406 Arquitectura de ordenadores
Issue Date: 1999
Journal: Lecture Notes in Computer Science 
Conference: 3rd International Conference on Vector And Parallel Processing (VECPAR 98) 
Abstract: This paper presents a comparison between superscalar and vector processors. First, we start with a detailed ISA analysis of the vector machine, including data related to masked execution, vector length and vector first facilities. Then we present a comparison of the two models at the instruction set architecture (ISA) level that shows that the vector model has several advantages: executes fewer instructions, fewer overall operations, and generally executes fewer memory accesses. We then analyse both models in terms of speculative execution, each one in its context. Results show that superscalar processors make an extensive use of speculation and that there is a large amount of misspeculated instructions. In the vector model, speculation is achieved using vector masks and, in general, fewer operations are misspeculated.
URI: http://hdl.handle.net/10553/72822
ISBN: 978-3-540-48516-2
ISSN: 0302-9743
DOI: 10.1007/10703040_41
Source: Hernández V., Palma J.M.L.M., Dongarra J.J. (eds) Vector and Parallel Processing – VECPAR’98. Lecture Notes in Computer Science, [ISSN 0302-9743], v. 1573, p. 548-560. Springer, Berlin, Heidelberg. (1999)
Appears in Collections:Actas de congresos
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