Does that means...

By: Dresdenboy (M.Waldhauer.delete@this.gmx.de), July 23, 2004 2:27 am
Room: Moderated Discussions
_Arthur (_Arthur@globetrotter.net) on 7/22/04 wrote:
---------------------------
>One could also microcode new instructions for something useful, like to speed up
>(slightly) a SETI search or DiVX encoding...

That's exactly, why I'm interested in that stuff (regarding Prime95). Such custom instructions could help speeding up parts of the FFT butterflies or help to circumvent MUL/IMUL inefficiencies (with fixed input and result registers) or a missing MUL to get only the upper half of a product. But to make that stuff useful, it's better to have a small routine in microcode than just one instruction because this could waste decode bandwidth. But maybe (according to a patent) the Pack pipeline stage is able to fill instruction slots which are not used by instructions coming from microcode ROM/RAM.
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Opteron Exposed: Reverse Engineering AMD K8 Microcode UpdatesAnonymous2004/07/22 12:39 AM
  Opteron Exposed: Reverse Engineering AMD K8 MicrocDresdenboy2004/07/22 04:13 AM
    Opteron Exposed: Reverse Engineering AMD K8 MicrocAK2004/07/22 07:49 AM
      Opteron Exposed: Reverse Engineering AMD K8 MicrocDresdenboy2004/07/22 09:26 AM
        the former posting has no new text, continue hereDresdenboy2004/07/22 09:32 AM
  An additionDresdenboy2004/07/22 07:04 AM
    An additionAnonymous2004/07/22 01:32 PM
      An additionDresdenboy2004/07/22 01:55 PM
  Opteron Exposed: Reverse Engineering AMD K8 Microctom vier2004/07/22 07:38 AM
    Opteron Exposed: Reverse Engineering AMD K8 MicrocWouter Tinus2004/07/22 07:56 AM
    Opteron Exposed: Reverse Engineering AMD K8 MicrocIgor2004/07/23 09:00 PM
      Opteron Exposed: Reverse Engineering AMD K8 MicrocKronos2004/07/24 01:04 PM
  Opteron Exposed: Reverse Engineering AMD K8 Microcode UpdatesMax2004/07/22 12:01 PM
    Opteron Exposed: Reverse Engineering AMD K8 Microcode UpdatesAnonymous2004/07/22 04:26 PM
  Does that means..._Arthur2004/07/22 09:01 PM
    Does that means...Dresdenboy2004/07/23 02:27 AM
    Does that means...Jan2004/07/23 06:51 AM
      Does that means...Anonymous2004/07/23 02:10 PM
        Does that means...Igor2004/07/23 09:42 PM
          Does that means...Anonymous2004/07/24 08:53 PM
            Does that means...Igor2004/07/24 11:08 PM
            Does that means...Anonymous2004/07/24 11:17 PM
              Does that means...anonymous2004/07/25 03:31 PM
                Does that means...Igor2004/07/26 07:42 PM
  Permanent virusess.chauhan2004/07/26 11:25 PM
    Permanent virusesAnonymous2004/07/27 09:42 AM
  Finding candidates to replace their microcodeDresdenboy2004/08/19 01:06 AM
    Finding candidates to replace their microcodePaul DeMone2004/08/19 05:22 AM
      Finding candidates to replace their microcodeDavid Kanter2004/08/19 05:53 AM
        Finding candidates to replace their microcodefoobar2004/08/19 08:55 AM
          Finding candidates to replace their microcodeDavid Kanter2004/08/19 09:58 AM
          Finding candidates to replace their microcodeAnonymous2004/08/20 12:56 PM
            Finding candidates to replace their microcodehobold2004/08/23 02:14 PM
      Finding candidates to replace their microcodeDresdenboy2004/08/19 09:59 AM
        Finding candidates to replace their microcodeanonymous2004/08/19 02:35 PM
        Finding candidates to replace their microcodeAnonymous2004/08/20 01:23 PM
          Finding candidates to replace their microcodeGroo2004/08/20 08:25 PM
          Finding candidates to replace their microcodeDresdenboy2004/08/21 04:01 AM
            Finding candidates to replace their microcodeAnonymous2004/08/21 03:45 PM
              Finding candidates to replace their microcodeanonymous2004/08/21 08:45 PM
      Finding candidates to replace their microcodeMatt Craighead2004/08/19 12:18 PM
      Finding candidates to replace their microcodeRick C. Hodgin2004/08/21 03:58 AM
        Finding candidates to replace their microcodeanonymous2004/08/21 08:41 PM
          Finding candidates to replace their microcodeRick C. Hodgin2004/08/22 07:31 AM
            Finding candidates to replace their microcodeanonymous2004/08/23 07:56 AM
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