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.

Claims

17 · 2 independent · depth 3

17 granted claims

›1.independentA computer program product for executing a machine instruction in a computing environment, said computer program product comprising:na computer readab…+10

›2.↳ 1The computer program product of claim 1, wherein the operand is stored by another processor or an input/output subsystem coupled to the processor.d2

›3.↳ 1The computer program product of claim 1, wherein the predefined action comprises one of:nthe operand becomes the first value or the second value; oran…d2+1

›5.↳ 1The computer program product of claim 1, wherein the first value comprises a negative value, the second value comprises zero, and the third value comp…d2

›6.↳ 1The computer program product of claim 1, wherein based on aborting transactional execution, a condition code in a transaction abort program status wor…d2

›7.↳ 1The computer program product of claim 1, wherein based on ending the transaction, store accesses made by the transaction are committed, a transaction …d2

›8.↳ 1The computer program product of claim 1, wherein the executing further comprises:ndetermining whether the processor is in a nonconstrained transaction…d2+1

›10.↳ 1The computer program product of claim 1, wherein the one or more fields comprise an index field, a base field, a first displacement field and a second…d2+1

›12.independentA computer system for executing a machine instruction in a computing environment, said computer system comprising:na memory; anda processor in communi…+5

›13.↳ 12The computer system of claim 12, wherein the predefined action comprises one of:nthe operand becomes the first value or the second value; oran interva…d2+1

›15.↳ 12The computer system of claim 12, wherein based on ending the transaction, store accesses made by the transaction are committed, a transaction nesting …d2

›16.↳ 12The computer system of claim 12, wherein the executing further comprises:ndetermining whether the processor is in a nonconstrained transactional execu…d2

›17.↳ 12The computer system of claim 12, wherein the one or more fields comprise an index field, a base field, a first displacement field and a second displac…d2

Classifications

3 codes

IPC · International Patent Classification

Section G — Physics

G06F9/46
G06F9/30
G06F9/38

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2.4 y

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Idriss N Alrobaye

art unit 2183 · TC 2100

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Type	Document	Date
related publication	US 20150261531 A1	17 Sep 2015

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