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prefetch ==>
instruction prefetch
<architecture> A technique which attempts to minimise the time
a processor spends waiting for instructions to be fetched
from memory. Instructions following the one currently being
executed are loaded into a prefetch queue when the processor's
external bus is otherwise idle. If the processor executes a
branch instruction or receives an interrupt then the queue
must be flushed and reloaded from the new address.
Instruction prefetch is often combined with pipelining in
an attempt to keep the pipeline busy.
By 1995 most processors used prefetching, e.g. Motorola
680x0, Intel 80x86.
[First processors using prefetch?]
(1998-03-29)
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Nearby terms:
Institut National de Recherche en Informatique et Automatique « Instruction Address Register « instruction mnemonic « instruction prefetch » instruction scheduling » instruction set » instruction set architecture
This article was derived from the Free Online Dictionary of Computers and is available under ther terms of the GNU Free Documentation License.
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