Microprocessor with Compact Instruction Set Architecture
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United States of America Patent
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Issued Date -
Nov 12, 2009
app pub date -
May 8, 2009
filing date -
May 8, 2008
priority date (Note) -
Abandoned
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Abstract
A re-encoded instruction set architecture (ISA) provides smaller bit-width instructions or a combination of smaller and larger bit-width instructions to improve instruction execution efficiency and reduce code footprint. The ISA can be re-encoded from a legacy ISA having larger bit-width instructions and can be used to unify one or more ISA extensions such as application specific ASEs. The re-encoded ISA maintains assembly-level compatibility with the ISA from which it is derived. In addition, the re-encoded ISA can have new and different types of additional instructions.
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