Re: AVX generic mode tuning discussion.

2013-01-08 Thread Richard Biener
On Mon, Jan 7, 2013 at 7:21 PM, Jagasia, Harsha wrote: We would like to propose changing AVX generic mode tuning to generate 128-bit AVX instead of 256-bit AVX. >>> >>> You indicate a 3% reduction on bulldozer with avx256. >>> How does avx128 compare to -mno-avx -msse4.2? >> Will the nex

Re: AVX generic mode tuning discussion.

2011-11-02 Thread Richard Guenther
On Wed, Nov 2, 2011 at 5:57 PM, Jagasia, Harsha wrote: >> >> > > We would like to propose changing AVX generic mode tuning to >> >> generate >> >> > 128-bit >> >> > > AVX instead of 256-bit AVX. >> >> > >> >> > You indicate a 3% reduction on bulldozer with avx256. >> >> > How does avx128 compare t

RE: AVX generic mode tuning discussion.

2011-11-02 Thread Jagasia, Harsha
> >> > > We would like to propose changing AVX generic mode tuning to > >> generate > >> > 128-bit > >> > > AVX instead of 256-bit AVX. > >> > > >> > You indicate a 3% reduction on bulldozer with avx256. > >> > How does avx128 compare to -mno-avx -msse4.2? > >> > >> We see these % differences going

Re: AVX generic mode tuning discussion.

2011-11-01 Thread Richard Guenther
On Mon, Oct 31, 2011 at 9:36 PM, Jagasia, Harsha wrote: >> > > We would like to propose changing AVX generic mode tuning to >> generate >> > 128-bit >> > > AVX instead of 256-bit AVX. >> > >> > You indicate a 3% reduction on bulldozer with avx256. >> > How does avx128 compare to -mno-avx -msse4.2?

RE: AVX generic mode tuning discussion.

2011-10-31 Thread Jagasia, Harsha
> > > We would like to propose changing AVX generic mode tuning to > generate > > 128-bit > > > AVX instead of 256-bit AVX. > > > > You indicate a 3% reduction on bulldozer with avx256. > > How does avx128 compare to -mno-avx -msse4.2? > > We see these % differences going from SSE42 to AVX128 to A

RE: AVX generic mode tuning discussion.

2011-07-21 Thread Jagasia, Harsha
> >> We would like to propose changing AVX generic mode tuning to > generate 128-bit > >> AVX instead of 256-bit AVX. > > > > You indicate a 3% reduction on bulldozer with avx256. > > How does avx128 compare to -mno-avx -msse4.2? > > Will the next AMD generation have a useable avx256? > > > > I'm n

RE: AVX generic mode tuning discussion.

2011-07-21 Thread Jagasia, Harsha
> On 07/12/2011 02:22 PM, harsha.jaga...@amd.com wrote: > > We would like to propose changing AVX generic mode tuning to generate > 128-bit > > AVX instead of 256-bit AVX. > > You indicate a 3% reduction on bulldozer with avx256. > How does avx128 compare to -mno-avx -msse4.2? We see these % diff

Re: AVX generic mode tuning discussion.

2011-07-13 Thread Jakub Jelinek
On Wed, Jul 13, 2011 at 10:42:41AM +0200, Richard Guenther wrote: > I suppose generic tuning is of less importance for AVX as > people need to enable that manually anyway (and will possibly > do so only via means of -march=native). Yeah, but if somebody does compile with -mavx -mtune=generic, I'd

Re: AVX generic mode tuning discussion.

2011-07-13 Thread Richard Guenther
On Tue, Jul 12, 2011 at 11:56 PM, Richard Henderson wrote: > On 07/12/2011 02:22 PM, harsha.jaga...@amd.com wrote: >> We would like to propose changing AVX generic mode tuning to generate 128-bit >> AVX instead of 256-bit AVX. > > You indicate a 3% reduction on bulldozer with avx256. > How does av

Re: AVX generic mode tuning discussion.

2011-07-12 Thread Richard Henderson
On 07/12/2011 02:22 PM, harsha.jaga...@amd.com wrote: > We would like to propose changing AVX generic mode tuning to generate 128-bit > AVX instead of 256-bit AVX. You indicate a 3% reduction on bulldozer with avx256. How does avx128 compare to -mno-avx -msse4.2? Will the next AMD generation have