Re: [PATCH, powerpc] Add -mmass to use XL's MASS vectorization library

[Richard Guenther <richard dot guenther at gmail dot com>]

On Wed, Aug 18, 2010 at 10:32 PM, Michael Meissner
<meissner@linux.vnet.ibm.com> wrote:
> This patch was cloned from the i386 -mveclibabi=<xxx> support, and it adds a
> new switch (-mmass) that says to vectorize various mathematical functions (sin,
> cos, etc.) on power7 systems. ?This patch greatly speeds up 3 of the Spec 2006
> floating point benchmarks (tonto, wrf, GemsFDTD) that heavily use the math
> functions. ?I have done bootstraps on my power systems, and comparison tests
> and there were no regressions. ?Is it ok to install in the tree?

In the case that we develop a common library for all archs it would be nice
to have the same switch for ppc as we have for x86, so why didn't you
use -mveclibabi=mass?

Richard.

> [gcc]
> 2010-08-18 ?Michael Meissner ?<meissner@linux.vnet.ibm.com>
>
> ? ? ? ?* config/rs6000/rs6000.opt (-mmass): New option to enable the
> ? ? ? ?compiler to autovectorize mathmetical functions for power7 using
> ? ? ? ?the Mathematical Acceleration Subsystem library.
>
> ? ? ? ?* config/rs6000/rs6000.c (rs6000_builtin_vectorized_libmass): New
> ? ? ? ?function to handle auto vectorizing math functions that are in the
> ? ? ? ?MASS library.
> ? ? ? ?(rs6000_builtin_vectorized_function): Call it.
>
> ? ? ? ?* doc/invoke.texi (RS/6000 and PowerPC Options): Document -mmass.
>
> [gcc/testsuite]
> 2010-08-18 ?Michael Meissner ?<meissner@linux.vnet.ibm.com>
>
> ? ? ? ?* gcc.target/powerpc/vsx-mass-1.c: New file, test -mmass.
>
> --
> Michael Meissner, IBM
> 5 Technology Place Drive, M/S 2757, Westford, MA 01886-3141, USA
> meissner@linux.vnet.ibm.com
>