Instructions and logic provide pushing buffer copy and store functionality. Some embodiments include a first hardware thread or processing core, and a second hardware thread or processing core, a cache to store cache coherent data in a cache line for a shared memory address accessible by the second hardware thread or processing core. Responsive to decoding an instruction specifying a source data operand, said shared memory address as a destination operand, and one or more owner of said shared memory address, one or more execution units copy data from the source data operand to the cache coherent data in the cache line for said shared memory address accessible by said second hardware thread or processing core in the cache when said one or more owner includes said second hardware thread or processing core.