System and method for large memory transaction (LMT) stores

A method comprising:

• performing, by a processor accelerator, a large memory transaction (LMT) store of a data set to a coprocessor in response to an instruction from a processor targeting the coprocessor, the processor associated with a data-processing width, the data set corresponding to the instruction, the performing including storing data from the data set, atomically, to the coprocessor based on a LMT line (LMTLINE), the LMTLINE wider than the data-processing width;
• and
• sending, from the processor accelerator to the processor, a response to the instruction, the response based on completion of the LMT store of the data set in its entirety.

An apparatus comprising:

• means for performing a large memory transaction (LMT) store of a data set to a coprocessor in response to an instruction from a processor targeting the coprocessor, the data set corresponding to the instruction, the performing including storing data from the data set, atomically, to the coprocessor based on a LMT line (LMTLINE), the LMTLINE wider than a data-processing width;
• and
• means for sending, to the processor, a response to the instruction, the response based on completion of the LMT store of the data set in its entirety.