I was able to integrate the SHA256 functionality from Crypto++ 5.6.0 into Bitcoin.  This is the fastest SHA256 yet using the SSE2 assembly code.  Since Bitcoin was sending unaligned data to the block hash function, I had to change the MOVDQA instruction to MOVDQU.

I think using the SHA256 functionality from Crypto++ 5.6.0 is the way forward right now.

http://www.filedropper.com/bitcoin-033