Re: Altivec matmul kernel (attachment)

[Peter Soendergaard <soender@cs.utk.edu>]

Hi guys,

I would like to see the assembly as well, I have been trying to adapt my
codegenerator to produce Altivec assembly, but I could never get my inline
assembly macros to work correctly. If I can just look at the generated
assembly I should be able to write the macros in no time. In my
experience, good AltiVec assembly examples for gcc has been rather hard to
find on the net, so I would love a good working example.

Thanks,

Peter.

On 17 Jul 2001, Camm Maguire wrote:

> Greetings, and thanks for your reply!
> 
> Nicholas Coult <coult@augsburg.edu> writes:
> 
> > On second thought, I think generating assembly wouldn't solve the 
> > problem, since the assembler has to recognize the altivec assembly 
> > instructions in order to generate the object code...
> > 
> 
> This is true, but I'd wager that an altivec capable binutils is most
> likely already the default for ppc, whereas the patched gcc may never
> be available as an option for the distribution.  
> 
> To get the assembler, just do your mmutstcase, look for the line where
> your C file is compiled, copy this, changing -c to -S and -o ... to -o
> foo.s.  
> 
> I'm looking into the patched gcc.  There may be a Debian developer who
> would be willing to package it for the ppc.  If this can be done,
> would be far preferable to dealing with the assembly, so you might
> want to hold off until I hear from him.
> 
> Take care,
> 
> > On Tuesday, July 17, 2001, at 03:22  PM, Camm Maguire wrote:
> > 
> > >
> > > Greetings!  I was just checking out your kernel, and realized that it
> > > requires a compiler which recognizes the altivec extension keywords,
> > > which gcc alas does not.  Could you perhaps compile with the -S flag
> > > to generate assembly output files, and post these?  gcc can wrap this
> > > code in a C macro.  Many Debian PPC users might appreciate your
> > > kernel!
> > >
> > > Take care,
> > > --
> > > Camm Maguire			     			camm@enhanced.com
> > > =========================================================================
> > > =
> > > "The earth is but one country, and mankind its citizens."  --  
> > > Baha'u'llah
> > >
> > 
> > --
> > Nicholas Coult, Ph.D.,  web: http://melby.augsburg.edu/~coult
> > Assistant Professor, Department of Mathematics, Augsburg College
> > coult@augsburg.edu, phone:  (612) 330-1064 office: Science Hall 137B
> > 
> > 
> 
>