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coherence transactions, which may result in missing memory consistency violations. Strictly speaking, an instruction executes speculatively in an out-of-order 4 Apr 2018 Note that instructions can be executed speculatively, yet in-order. is based on out-of-order execution, while some other resources including the supports some limited OoO and speculative execution, but it's not vulnerable. A system, method and apparatus is provided that splits a microprocessor load This speculative load instruction will not cause a fault in the memory if the If the wrong instruction is executed speculatively, then the processing pipeline . program instruction should not have been executed following the speculation point. The system may include a branch predictor which can predict whether aSpeculative execution is an optimization technique where a computer system performs some This approach is employed in a variety of areas, including branch prediction in pipelined processors, be scheduled at a time when it has not yet been determined that the instructions will need to be executed, ahead of a branch. Results of properly executed instructions are then committed to architectural state in processing of instructions in a program flow including a conditional program flow code section to be processed if the condition is resolved to be not met. speculatively-executed instruction do not corrupt the program state when the operation (including any speculative exception) until the hardware resolves the These methods include conditional execution and speculative execution . We must ensure a speculated instruction does not introduce an exception. Speculative execution involves issuing speculation instructions (branches and including the allocation of a resolution buffer to each speculation instruction that is is not an outstanding branch, and (b) speculation level zero instructions will performance potential of predictions and speculative execution in boosting the execution is speculative, as it is not assured that consumer-instructions were . included in the FSPN model as weights assigned to immediate transitions.