Stack pointer instruction buffer for zero-cycle loads

A method, comprising:

• buffering, into a store queue circuit, a particular store instruction and dependency information that is related to the particular store instruction;
• releasing, from the store queue circuit for execution, the particular store instruction and the related dependency information;
• in response to the releasing, storing, in a rescue buffer circuit, a subset of the dependency information for the particular store instruction;
• identifying a subsequent load instruction that corresponds to a memory location associated with the particular store instruction;
• and
• after the particular store instruction is released, performing, using the dependency information from the rescue buffer circuit, the subsequent load instruction.

An apparatus comprising:

• a rescue buffer circuit configured to retain dependency information related to store instructions;
• a store queue circuit configured to buffer dependency information related to a particular store instruction until the particular store instruction is released to be executed;
• and
• a control circuit configured to:
• cause a subset of the dependency information for the particular store instruction to be written to the rescue buffer circuit, wherein the rescue buffer circuit is configured to retain the subset after the dependency information has been released from the store queue circuit;
• and
• perform a subsequent load instruction corresponding to a memory location associated with the particular store instruction using the subset of the dependency information from the rescue buffer circuit.