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System and method for supporting data value coherence in computer system

A computer system, data value technology, applied in the computer field to achieve the effect of improving the ability

Inactive Publication Date: 2011-07-27
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The first question addresses the issue of code location
The latter two questions deal with data value issues

Method used

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  • System and method for supporting data value coherence in computer system
  • System and method for supporting data value coherence in computer system
  • System and method for supporting data value coherence in computer system

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0071] ld tregB, ADDR0; / / target register tregB from memory at address ADDR0

[0072] / / take the value

[0073] mv tregA, tregB; / / Move the value of the target register tregB to tregA

[0074] ld tregB, ADDR1; / / tregB gets new value

[0075] st tregA, ADDR2; / / overflow the previous value of tregB to address ADDR2

[0076] / / memory

[0077] ld tregC, ADDR2 / / Reload the previous value of tregB into register tregC

[0078] conditional_jump L1;

[0079] mv tregC, tregD; / / Load the value of tregD into tregC

[0080] L1)

[0081] mv tregE, tregC; / / Use the value of tregD or the previous value of tregB in the assignment of tregE

[0082] / / a value

[0083] Assuming that tregB initially obtains the value of the original register OREG1 from the memory unit at ADDR0 (that is, the first original instruction loads OREG1 from ADDR0), and tregD contains the value of OREG2, what value does tregE obtain at L1? The answer to this question depends on which path the code is executed thr...

example 2

[0086] LD OREGA, ADDR1; / / Load with the value in memory address ADDR1

[0087] / / OREGA

[0088] ... / / The calculation chain here is based on the value in OREGA

[0089] ... / / take the result from OREGB

[0090] ST OREGB, ADDR1 / / store new value in memory

[0091] LD OREGA, ADDR2 / / Load OREGA with another value

[0092] ... / / another calculation chain based on the new value

[0093] ... / / Adopt the result from OREGC

[0094] ST OREGC, ADDR2 / / store the next new value in memory

[0095] Here, the OREGA register is used for values ​​at different times. In wider distribution machines, such as VLIW (Very Long Instruction Word) machines, these two computation chains may have been parallelized.

[0096] / / Two instances of OREGA have been translated into two stored in treg17 and treg19

[0097] / / parallel instances.

[0098] ld treg17, addr1; ld treg19, addr2; nop; nop;

[0099] / / The two computational chains are parallelized on each VLIW machine functional unit.

[0100...

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Abstract

The invention concerns the general data value problem, and especially the residence problem in a computer system when executing program code translated from a source code representation (10) into a target code representation (30). A basic idea of the invention is to associate references to target data value containers (40) in the target code with corresponding address information of original datavalue containers (20) of the source code during program code translation, and store information related to target code instructions together with associated address information of original data valuecontainers at execution of target code to uphold a data value view (50) of the original source code representation. In this way, tracking of data values of original source code (10) at execution of translated target code (30) in a target system is supported in a highly efficient manner.

Description

technical field [0001] The present invention generally relates to the field of computer technology, more particularly to computer micro-architecture, compiler technology and debugging technology, especially the problem of data value consistency in computer systems when translating program codes. Background technique [0002] The field of computer microarchitecture itself deals with the design of the internal structures of computers to support models of computation. Compiler technology is a technology used to support the translation of computer program code from one form to another, and debugging technology is generally a technology used to debug, in other words, to find errors in computer programs. [0003] Loss of consistency of code locations and data values ​​is a problem when translating code from one format to another. The problem is exposed when translating source code down from a high-level language to a target format, or when translating code from one "target" forma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/45G06F11/36
CPCG06F11/3624G06F11/3628G06F8/41
Inventor M·温伯格L·温伯格N·O·尼尔森M·赫梅特克
Owner TELEFON AB LM ERICSSON (PUBL)