Store load forward predictor untraining

A computer system comprising:

• a processor including:
• a store to load forward (STLF) predictor coupled to receive an indication of dispatch of a first load memory operation, wherein said STLF predictor is configured to indicate a dependency of said first load memory operation on a first store memory operation responsive to information stored within said STLF predictor indicating that, during a previous execution, said first store memory operation interfered with said first load memory operation;
• and
• an execution pipeline coupled to said STLF predictor, wherein said execution pipeline is configured to inhibit execution of said first load memory operation prior to said first store memory operation responsive to an indication of said dependency, and wherein said execution pipeline is configured to detect a lack of said dependency during execution of said first load memory operation, and wherein said execution pipeline is configured to generate an untrain signal responsive to said lack of said dependency;
• wherein said STLF predictor is coupled to receive said untrain signal and is configured to update said information stored therein to not indicate that said first store memory operation interfered with said first load memory operation during said previous execution;
• and
• wherein said execution pipeline includes a store queue, and wherein said execution pipeline is configured to detect said lack of dependency if forwarding of data from said store queue for said first load memory operation does not occur;
• and
• an input/output (I/O) device configured to communicate between said computer system and another computer system to which said I/O device is couplable.

A method comprising:

• indicating a dependency of a first load memory operation on a first store memory operation responsive to information indicating that, during a previous execution, said first store memory operation interfered with said first load memory operation;
• inhibiting scheduling of said first load memory operation prior to scheduling said first store memory operation;
• detecting a lack of said dependency during execution of said first load memory operation, wherein said detecting comprises detecting a lack of forwarding of data from a store queue for said first load memory operation;
• and
• updating said information indicating that, during said previous execution, said first store memory operation interfered with said first load memory operation to not indicate that, during said previous execution, said first store memory operation interfered with said first load memory operation responsive to said detecting.