DOS ain't dead

MMX moves (Developers)

posted by rr  , Berlin, Germany, 16.02.2009, 21:34

> I measured than if I switch on the "block A" it is about 8% slower than if
> I switch it off.

What CPU on?

> {block A}
> @mmxloop: movq mm0,ds:[esi];movq es:[edi],mm0
> add esi,8;sub ecx,8;add edi,8;cmp ecx,8;jge @mmxloop

I think those "[eXi]" require some slow effective address calculations on each iteration. Maybe some ASM coder knows more? Japheth, mht?

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Complete thread:

• MMX moves - Laaca, 16.02.2009, 21:20 (Developers)
  • MMX moves - rr, 16.02.2009, 21:34
  • MMX moves - Japheth, 16.02.2009, 22:05
    • MMX moves - rr, 16.02.2009, 22:11
      • MMX moves - Japheth, 17.02.2009, 13:52
        • MMX moves - Laaca, 17.02.2009, 16:29
          • MMX moves - Japheth, 17.02.2009, 17:16
            • MMX moves - Laaca, 17.02.2009, 18:56
      • MMX moves - marcov, 18.02.2009, 09:55
  • MMX moves - FFK, 16.02.2009, 23:04
  • MMX moves - Rugxulo, 17.02.2009, 00:54
  • MMX moves - FFK, 17.02.2009, 21:37
    • MMX moves - Rugxulo, 18.02.2009, 00:48
    • MMX moves - Japheth, 18.02.2009, 09:08
      • MMX moves - FFK, 18.02.2009, 09:44