Software for producing instructions in a compressed format for a VLIW processor
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United States of America Patent
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Jul 28, 1998
Grant Date -
N/A
app pub date -
May 15, 1996
filing date -
May 15, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Software creates a compressed instruction format for a VLIW processor which allows greater efficiency in use of cache and memory. Instructions are byte aligned and variable length. Branch targets are uncompressed. Format bits specify how many issue slots are used in a following instruction. NOPS are not stored in memory. Individual operations are compressed according to features such as whether they are resultless, guarded, short, zeroary, unary, or binary. Instructions are stored in compressed form in memory and in cache. Instructions are decompressed on the fly after being read out from cache.
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