Pipeline control for high-frequency pipelined designs

A pipeline control system comprising:

• a plurality of operation stages for processing instructions, the operation stages including at least one instruction issue stage including buffers wherein instructions wait to be issued;
• means for issuing the instructions;
• means for analyzing the issued instructions to determine if resources are available to execute the issued instructions, if resources are not available, the issued instructions are to be aborted including means for marking the aborted instruction as a candidate for reissue;
• and
• means for directly returning the aborted instructions to the at least one instruction issue stage without communicating that instructions have been aborted to other stages of the plurality of operational stages such that the aborted instructions are reissued by the means for issuing the instructions while the operational stages continue to process instructions;
• the means for directly returning the aborted instructions further including a mechanism coupled to a stage of the plurality of stages, the mechanism is directly connected to the at least one issue stage for communicating the aborted instructions directly to the at least one instruction issue stage.

A method for pipeline control for processors comprising the steps of:

• providing operation stages for processing instructions, the operation stages including at least one instruction issue stage including buffers wherein instructions wait to be issued;
• issuing instructions for execution;
• analyzing the issued instructions to determine if the issued instructions are to be aborted and reissued;
• and
• eliminating stall conditions by directly communicating the aborted instructions to the at least one instruction issue stage by directly returning the aborted instructions to be reissued to the at least one instruction issue stage without communicating that instructions have been aborted to other stages of the plurality of operational stages such that the instruction is reissued while the operational stages continue to process instructions.