Methods and apparatuses relating to offload operations are described. In one embodiment, a hardware processor includes a core to execute a thread and offload an operation; and a first and second hardware accelerator to execute the operation, wherein the first and second hardware accelerator are coupled to shared buffers to store output data from the first hardware accelerator and provide the output data as input data to the second hardware accelerator, an input buffer descriptor array of the second hardware accelerator with an entry for each respective shared buffer, an input buffer response descriptor array of the second hardware accelerator with a corresponding response entry for each respective shared buffer, an output buffer descriptor array of the first hardware accelerator with an entry for each respective shared buffer, and an output buffer response descriptor array of the first hardware accelerator with a corresponding response entry for each respective shared buffer.