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Scalar supercomputer architecture

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1 Author(s)
Weiss, Shlomo ; Dept. of Comput. Sci., Maryland Univ., Baltimore, MD, USA

High-performance scalar architectures that have the capability to issue multiple instructions per clock period are considered. The essential characteristics and the principal architectural tradeoffs in scientific array processors, very-long-instruction-word (VLIW) machines, the polycyclic architecture and decoupled computers are examined. Array processors rely solely on static code scheduling done manually or by the compiler. The scheduling task is quite complex, and the resulting code may not be very efficient. In a VLIW, sophisticated compiler technology provides software solutions for functions traditionally done in hardware. The polycyclic architecture is similar to array processors in its structure but provides architectural support to the instruction scheduling task. In decoupled architectures the hardware changes the order of instruction execution at run time. This dynamic code scheduling capability does not come at the expense of additional control complexity

Published in:

Proceedings of the IEEE  (Volume:77 ,  Issue: 12 )

Date of Publication:

Dec 1989

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