Re: hwcap support for AMD64?

2004-12-29 Thread Kurt Roeckx 
On Tue, Dec 28, 2004 at 08:26:59PM -0600, Marcelo E. Magallon wrote:
 On Wed, Dec 29, 2004 at 01:05:36AM +0100, Kurt Roeckx wrote:
 
  I personally don't care for Intel CPUs but if someone is willing to
  test on that platform (which AFAICT gcc 3.3 does not support) and
  provide a configuration file (this would require less than 10 minutes
  for someone who knows what he's doing) I'll gladly include it in the
  build.

Both Amd and Intel are supported by gcc-3.3.  It's just that
Intel's require a different scheduling then Amd's.  gcc-3.4 has
optimisation for both.


Kurt

Re: hwcap support for AMD64?

2004-12-28 Thread Marcelo E. Magallon 
On Wed, Dec 29, 2004 at 01:05:36AM +0100, Kurt Roeckx wrote:

I'm repacking Mesa and I'd like to support architecture-optimized
libraries along with the regular ones.  Does amd64 support hwcaps?
If yes, what's the ld.so search path?
  
  What are hwcaps?  Do you plan to have seperate binaries for the k8
  (amd64) and nocoda (intel) cpus?

 That's what hwcaps are.

 I don't know what I want to support :-)

 For now the library in /usr/lib/libGL.so.1 is compiled using -O2 and
 nothing else.  Neither MMX nor SSE can be used because even if the
 assembler code is mostly compatible (AFAICR a slight change is needed,
 but I don't have my code handy and my memory is lousy, so I don't
 remember what this change is).  It doesn't use 128-bit media
 instructions either, which would be more appropriate in this case (and
 more of a speed boost).

 Now that I think of it, it doesn't make much sense to have hwcaps on
 this platform since it refers practically to a single CPU.

 I personally don't care for Intel CPUs but if someone is willing to
 test on that platform (which AFAICT gcc 3.3 does not support) and
 provide a configuration file (this would require less than 10 minutes
 for someone who knows what he's doing) I'll gladly include it in the
 build.

  Yes, it defaults to 64 bit.

 Thanks,

 Marcelo