Restricted instructions in transactional execution
First Claim
Patent Images
1. A computer program product for performing processing associated with transactional execution in a computing environment, the computer program product comprising:
- a non-transitory computer readable storage medium readable by a processing circuit and storing instructions for performing a method comprising;
obtaining, by a processor, an instruction to be executed as part of a transaction of a nest of transactions;
computing one or more effective controls from one or more controls set by one or more transaction begin instructions initiating one or more transactions of the nest of transactions, the one or more effective controls comprising an effective allow floating point operation control that indicates whether specified floating point instructions are permitted to be executed;
determining by the processor whether the instruction is a selectively restricted instruction that is prohibited from execution within the transaction, the determining being based on the one or more effective controls computed from the one or more controls set by the one or more transaction begin instructions; and
performing processing associated with the instruction based on whether the instruction is selectively restricted.
1 Assignment
0 Petitions
Accused Products
Abstract
Restricted instructions are prohibited from execution within a transaction. There are classes of instructions that are restricted regardless of type of transaction: constrained or nonconstrained. There are instructions only restricted in constrained transactions, and there are instructions that are selectively restricted for given transactions based on controls specified on instructions used to initiate the transactions.
-
Citations
20 Claims
-
1. A computer program product for performing processing associated with transactional execution in a computing environment, the computer program product comprising:
a non-transitory computer readable storage medium readable by a processing circuit and storing instructions for performing a method comprising; obtaining, by a processor, an instruction to be executed as part of a transaction of a nest of transactions; computing one or more effective controls from one or more controls set by one or more transaction begin instructions initiating one or more transactions of the nest of transactions, the one or more effective controls comprising an effective allow floating point operation control that indicates whether specified floating point instructions are permitted to be executed; determining by the processor whether the instruction is a selectively restricted instruction that is prohibited from execution within the transaction, the determining being based on the one or more effective controls computed from the one or more controls set by the one or more transaction begin instructions; and performing processing associated with the instruction based on whether the instruction is selectively restricted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
11. A computer system for performing processing associated with transactional execution in a computing environment, the computer system comprising:
-
a memory; and a processor in communication with the memory, wherein the computer system is configured to perform a method, said method comprising; obtaining, by the processor, an instruction to be executed as part of a transaction of a nest of transactions; computing one or more effective controls from one or more controls set by one or more transaction begin instructions initiating one or more transactions of the nest of transactions, the one or more effective controls comprising an effective allow floating point operation control that indicates whether specified floating point instructions are permitted to be executed; determining by the processor whether the instruction is a selectively restricted instruction that is prohibited from execution within the transaction, the determining being based on the one or more effective controls computed from the one or more controls set by the one or more transaction begin instructions; and performing processing associated with the instruction based on whether the instruction is selectively restricted. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification