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   Message 129,678 of 131,241   
   MitchAlsup to All   
   Re: ST to LD forwarding Data   
   14 Sep 25 16:41:20   
   
   From: user5857@newsgrouper.org.invalid   
      
   Thomas Koenig  posted:   
      
   > MitchAlsup  schrieb:   
   > >   
   > > Does any one have {data on} or a pointer to {literature on} ST   
   > > to LD forwarding occurrences that isolate any of the following   
   > > patterns::   
   > >   
   > >      ST  Rs,[Rbase+smallDisp]   
   > >      ...   
   > >      LD  Rl,[Rbase+smallDisp]   
   > >   
   > > where Rbase is the 5-bit register specifier (not value), and:   
   > >       ST-Rbase is the same as LD-Rbase AND (of course)   
   > >       ST-smallDisp == LD-smallDISP,   
   > >   
   > > Where ST-Rbase is different than LD-Rbase but forwarding   
   > > happens none-the-less,   
   > >   
   > > Where ST-Rbase is the same as LD-Rbase, but Rbase has been   
   > > modified between ST and LD but forwarding happens none-the-   
   > > less,   
   > >   
   > >      ST  Rs,[Rbase+Rindex< >      ...   
   > >      LD  Rl,[Rbase+Rindex< >   
   > > Where ST-Rbase is the same as LD-Rbase but   
   > >       St-Rindex is different than LD-Rindex but   
   > > forwarding happens none-the-less,   
   > >   
   > > Where ST-Rbase is the same as LD-Rbase but Rbase has been   
   > > modified between ST and LD but forwarding happens none-the-   
   > > less,   
   > >   
   > > Where ST-Rindex is the same as LD-Rindex but Rindex has been   
   > > modified between ST and LD but forwarding happens none-the-   
   > > less,   
   >   
   > Could this be memory renaming?   
   >   
   > https://www.researchgate.net/publication/2504540_Memory_Renami   
   g_Fast_Early_and_Accurate_Processing_of_Memory_Communication   
   > is an older article, Agner Fog wrote something about   
   > something similar in "Mirroring memory operands" in   
   > https://agner.org/optimize/microarchitecture.pdf .   
      
   Thanks for the references   
   >   
   > HTH (somewhat).   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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