Near-orthogonal dual-MAC instruction set architecture with minimal encoding bits
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United States of America Patent
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Mar 4, 2003
Grant Date -
Jul 25, 2002
app pub date -
Aug 12, 1998
filing date -
Sep 8, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A near-orthogonal dual-MAC instruction set is provided which implements virtually the entire functionality of the orthogonal instruction set of 272 commands using only 65 commands. The reduced instruction set is achieved by eliminating instructions based on symmetry with respect to the result of the commands and by imposing simple restrictions related to items such as the order of data presentation by the programmer. Specific selections of commands are also determined by the double word aligned memory architecture which is associated with the dual-MAC architecture. The reduced instruction set architecture preserves the functionality and inherent parallelism of the command set and requires fewer command bits to implement than the full orthogonal set.
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