Re: Memory (compare and set) by 8 (cont from prev)
Aaron Tiensivu (tiensivu@pilot.msu.edu)
Sun, 16 May 1999 19:03:00 -0400
On Sat, May 15, 1999 at 11:12:20PM -0400, Alex K. wrote:
> OK, I'm assuming that if you're reading this, you read my message on
> memcpy by 8 bytes. Why not also implement memcmp and memset using MMX
> instructions to work by 8 bytes each? It would work just like the mempcy
> idea, just with a different instruction inside the loop (PCMPEQD for
> example, could be used for memcmp)
I think this was explored in the past but the cost of switching in and out
of MMX mode made the gain from it next to 0% or so.
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