BEFEHLSPUFFERSYSTEM FÜR EINEN DIGITALEN RECHNER
An instruction buffer for a digital computer controls the flow of instruction stream to an instruction decoder (32). As each instruction is consumed, a shifter (70) removes the consumed bytes and repositions the remaining bytes into the lowest order positioned. The byte positions left empty are fill...
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Main Authors | , , , , |
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Format | Patent |
Language | German |
Published |
15.08.1997
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Abstract | An instruction buffer for a digital computer controls the flow of instruction stream to an instruction decoder (32). As each instruction is consumed, a shifter (70) removes the consumed bytes and repositions the remaining bytes into the lowest order positioned. The byte positions left empty are filled by instruction stream bytes retrieved from one of a pair of prefetch buffers (64, 66) or from a virtual instruction cache (28). One prefetch buffer (66) is filled from the instrction cache (28) after being emptied, but prior to those particular bytes being requested to fill the instruction decoder (32). The two-level prefetching allows the relatively slow process of cache access to be performed during noncritical time. |
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AbstractList | An instruction buffer for a digital computer controls the flow of instruction stream to an instruction decoder (32). As each instruction is consumed, a shifter (70) removes the consumed bytes and repositions the remaining bytes into the lowest order positioned. The byte positions left empty are filled by instruction stream bytes retrieved from one of a pair of prefetch buffers (64, 66) or from a virtual instruction cache (28). One prefetch buffer (66) is filled from the instrction cache (28) after being emptied, but prior to those particular bytes being requested to fill the instruction decoder (32). The two-level prefetching allows the relatively slow process of cache access to be performed during noncritical time. |
Author | HETHERINGTON, RICKY C FITE, DAVID B MURRAY, JOHN E MANLEY, DWIGHT P MCKEON, MICHAEL M |
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Notes | Application Number: AT19890309274T |
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Snippet | An instruction buffer for a digital computer controls the flow of instruction stream to an instruction decoder (32). As each instruction is consumed, a shifter... |
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SubjectTerms | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS |
Title | BEFEHLSPUFFERSYSTEM FÜR EINEN DIGITALEN RECHNER |
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