[mdlug] [Fwd: Re: [opensuse] 64 bit vrs 32 bit advantagesspeedetc.]

[Ingles, Raymond]

> From: David Lane

> Compilers produce executable binary op code.  If I were the Intel Compiler
> Project Manager I would not let ant one spend any time for AMD CPU's. I
> would however have to find other employment If I were told to "Slow Down"
> non-Intel CPU's.

> And Yes I will have to read the article.

 Good, because that's what they did. Their compiler checks for SSE/SSE2/SSE3
capability, and uses it... if its a "GenuineIntel" CPU. But if it's any other
kind, it doesn't use SSE instructions... even if the CPU uses the standard
method to inform applications of SSE capability. I.e. even though the AMD
processors can run SSE code - and use Intel's own standard for specifying
that capability - the Intel compilers refuse to use SSE instructions on AMD
processors.

 This is a deliberate incompatibility. At the webpage I referred to, the author
has scripts that patch either generated executables or the compiler to allow
SSE on AMD. The programs run just fine.

 Sincerely,

 Ray Ingles                                         (313) 227-2317

 In October 1965, the Selective Service announced that married men
  without children could then be drafted. Exactly nine months and
      two days later... [Dick Cheney's] first child was born.
 http://dir.salon.com/politics/feature/2000/08/01/draft/index.html
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