Conditional transaction end instruction

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United States of America Patent

PATENT NO 10025589
SERIAL NO

15228067

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Abstract

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A Conditional Transaction End (CTEND) instruction is provided that allows a program executing in a nonconstrained transactional execution mode to inspect a storage location that is modified by either another central processing unit or the Input/Output subsystem. Based on the inspected data, transactional execution may be ended or aborted, or the decision to end/abort may be delayed, e.g., until a predefined event occurs. For instance, when the instruction executes, the processor is in a nonconstrained transaction execution mode, and the transaction nesting depth is one at the beginning of the instruction, a second operand of the instruction is inspected, and based on the inspected data, transaction execution may be ended or aborted, or the decision to end/abort may be delayed, e.g., until a predefined event occurs, such as the value of the second operand becomes a prespecified value or a time interval is exceeded.

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Patent Owner(s)

  • IBM CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Greiner, Dan F San Jose, US 272 4307
Jacobi, Christian Poughkeepsie, US 381 3569
Mitran, Marcel Markham, CA 96 1242
Schmidt, Donald W Stone Ridge, US 173 2709
Slegel, Timothy J Staatsburg, US 400 5854

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