Device and method for selectivity controlling result write back

A selective, purposeful technology, applied in the field of microelectronics, that can solve the problem of program loop waste, no longer usable, etc.

Inactive Publication Date: 2010-01-06
IP FIRST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this phenomenon occurs, although the programmer can perceive that the result of a recent loop execution has crossed a certain boundary, if the boundary defines a range in which the result of the latest loop execution becomes no longer available, then All previously repeated program loops are wasted

Method used

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  • Device and method for selectivity controlling result write back
  • Device and method for selectivity controlling result write back
  • Device and method for selectivity controlling result write back

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Embodiment Construction

[0070] The following description is provided in the light of a specific embodiment and its prerequisites to enable those of ordinary skill in the art to utilize the invention. However, various modifications to this preferred embodiment will be apparent to those skilled in the art, and the general principles discussed herein can be applied to other embodiments as well. Therefore, the present invention is not limited to the specific embodiments shown and described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0071] The previous article has made a background discussion on how to expand its structural features in today's microprocessors to exceed the capabilities of related instruction sets. In view of this, in figure 1 and figure 2 , an example of a related technique will be discussed. The discussion here highlights the constant dilemma that microprocessor designers face when, on the one hand, they want ...

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PUM

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Abstract

The invention relates to a microprocessor apparatus and method for selectively controlling write back of a result. The apparatus includes translation logic and extended execution logic. The translation logic translates an extended instruction into corresponding micro instructions. The extended instruction has an extended prefix and an extended prefix tag. The extended prefix disables write back of the result, where the result corresponds to execution of a prescribed operation. The extended prefix tag indicates the extended prefix, where the extended prefix tag is an otherwise architecturally specified opcode within an instruction set for a microprocessor. The extended execution logic is coupled to the translation logic. The extended execution logic receives the corresponding micro instructions, and executes the prescribed operation to generate the result, and precludes write back of the result.

Description

[0001] Comparison with Related Inventions [0002] This invention claims priority based on the following U.S. Invention Application: Docket No. 60 / 369688 , the date of application is April 2, 2002, and the title of the patent is "Apparatus and Method for Selectively Controlling Result Write-back". [0003] This invention is related to the following co-pending US patent applications having the same filing date and having the same applicant and inventor as this invention. [0004] Taiwan application Internal Documentation patent name No No 91116957 CNTR: 2176 Device and method for extending microprocessor instruction set 91116958 CNTR: 2186 Device and method for executing conditional instructions 91116956 CNTR: 2188 A device for selectively controlling condition code write-back and method 91116959 CNTR: 2189 Device for increasing the number of registers in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/22
Inventor G·葛兰·亨利罗德·E·胡克泰瑞·派克斯
Owner IP FIRST
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