> On 12/20/11 12:26, Sergei Trofimovich wrote: > > What would you prefer? > > I'd prefer not supporting broken hacks pretending to be new ABI models. > > Is there any real benefit to "AMD64-x32" over simply x86-32
Whole AMD64 ISA is accessible: twice as much registers (including xmm/ymm), instruction extensions available only in "long mode". It helps help codecs embedded into browsers and players. C calling convention uses registers (first six integer parameters go to registers) which reduces stack memory traffic. Quite nice comparing to what we have in ia32. > or AMD64 for X applications? Pointer memory footprint is on ia32 level. Saves Dcache and RAM for huge programs with large amount of references (like firefox and KDE). -- Sergei
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