Instruction decoding mechanism for reducing execution time by earlier detection and replacement of indirect addresses with direct addresses
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United States of America Patent
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-
Jan 12, 1999
Issued Date -
N/A
app pub date -
Sep 30, 1997
filing date -
Nov 16, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The mechanism includes a virtual address detecting circuit for detecting the virtual address of the instruction code. When a virtual address is detected, an indicating signal is generated, which is then sent to an indirect address register to register the indirect address of the instruction code. Thereafter, an indirect address replacing circuit is used to decode and replace the indirect address registered in and sent from the indirect address register with a direct address. In the absence of the virtual address, the direct address is allowed to pass through the indirect address replacing circuit.
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