Processor with instructions that operate on different data types stored in the same single logical register file
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United States of America Patent
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Sep 14, 2004
Issued Date -
N/A
app pub date -
Jul 27, 1999
filing date -
Dec 19, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A processor with instructions to operate on different data types stored in a single logical register file. According to one aspect of the invention, a first set of instructions of a first instruction type operates on the contents of what at least logically appears to software as a single logical register file. The first set of instructions appears to access the single logical register file as a flat register file. In addition, a first instruction of a second instruction type operates on the logical register file. However, the first instruction appears to access the logical register file as a stack referenced register file. Furthermore, sometime between starting the execution of the first set of instructions and completing the execution of the first instruction, all tags in a set of tags indicating whether corresponding registers in the single logical register file are empty or non-empty are caused to indicate non-empty states.
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