Volker Armin Hemmann googlemail.com> writes:
> >> http://www.agner.org/optimize/calling_conventions.pdf
> >
> > Not sure what you're trying to say.
> >
>
> that simd is not save in kernel if not carefully guarded.
>
> Really people, just don't fuck around with
Am 02.05.2015 um 14:38 schrieb Nikos Chantziaras:
> On 02/05/15 15:10, Volker Armin Hemmann wrote:
>> Am 02.05.2015 um 14:06 schrieb Nikos Chantziaras:
>>> On 02/05/15 14:37, Volker Armin Hemmann wrote:
Am 02.05.2015 um 13:25 schrieb Nikos Chantziaras:
>>>
>>> The kernel uses -O2 and s
On 02/05/15 15:10, Volker Armin Hemmann wrote:
Am 02.05.2015 um 14:06 schrieb Nikos Chantziaras:
On 02/05/15 14:37, Volker Armin Hemmann wrote:
Am 02.05.2015 um 13:25 schrieb Nikos Chantziaras:
The kernel uses -O2 and several -march variants (e.g. -march=core2).
Several other options are used
Am 02.05.2015 um 14:06 schrieb Nikos Chantziaras:
> On 02/05/15 14:37, Volker Armin Hemmann wrote:
>> Am 02.05.2015 um 13:25 schrieb Nikos Chantziaras:
>
> The kernel uses -O2 and several -march variants (e.g. -march=core2).
> Several other options are used to prevent GCC from generatin
On 02/05/15 14:37, Volker Armin Hemmann wrote:
Am 02.05.2015 um 13:25 schrieb Nikos Chantziaras:
The kernel uses -O2 and several -march variants (e.g. -march=core2).
Several other options are used to prevent GCC from generating
unsuitable code.
Specifying another -march variant does not affect
Am 02.05.2015 um 13:25 schrieb Nikos Chantziaras:
> On 02/05/15 14:19, Volker Armin Hemmann wrote:
>> Am 02.05.2015 um 07:04 schrieb Nikos Chantziaras:
>>> On 01/05/15 10:44, Andrew Savchenko wrote:
On Fri, 1 May 2015 05:09:51 + (UTC) Martin Vaeth wrote:
> Andrew Savchenko wrote:
On 02/05/15 14:19, Volker Armin Hemmann wrote:
Am 02.05.2015 um 07:04 schrieb Nikos Chantziaras:
On 01/05/15 10:44, Andrew Savchenko wrote:
On Fri, 1 May 2015 05:09:51 + (UTC) Martin Vaeth wrote:
Andrew Savchenko wrote:
That's why kernel makes sure that no floating point instructions
sn
Am 02.05.2015 um 07:04 schrieb Nikos Chantziaras:
> On 01/05/15 10:44, Andrew Savchenko wrote:
>> On Fri, 1 May 2015 05:09:51 + (UTC) Martin Vaeth wrote:
>>> Andrew Savchenko wrote:
That's why kernel makes sure that no floating point instructions
sneaks in using CFLAGS, you may
On 01/05/15 10:44, Andrew Savchenko wrote:
On Fri, 1 May 2015 05:09:51 + (UTC) Martin Vaeth wrote:
Andrew Savchenko wrote:
That's why kernel makes sure that no floating point instructions
sneaks in using CFLAGS, you may see a lot of -mno-${intrucion_set}
flags when running make -V.
So i
Andrew Savchenko gentoo.org> writes:
> > I can hardly imagine that otherwise the compiler converts integer
> > or pointer arithmetic into floating point arithmetics, or is
> > this really the case for certain flags? If yes, why should these
> > flags *ever* be useful?
> > I mean: The context sw
On Fri, 1 May 2015 05:09:51 + (UTC) Martin Vaeth wrote:
> Andrew Savchenko wrote:
> >
> > That's why kernel makes sure that no floating point instructions
> > sneaks in using CFLAGS, you may see a lot of -mno-${intrucion_set}
> > flags when running make -V.
>
> So it should be sufficient that
Andrew Savchenko wrote:
>
> That's why kernel makes sure that no floating point instructions
> sneaks in using CFLAGS, you may see a lot of -mno-${intrucion_set}
> flags when running make -V.
So it should be sufficient that the kernel does not use "float"
or "double", shouldn't it?
I can hardly i
On 30/04/15 02:52, Nikos Chantziaras wrote:
On 29/04/15 16:35, Holger Hoffstätte wrote:
On Wed, 29 Apr 2015 15:18:23 +0200, Ralf wrote:
Damn, you're absolutely right.
I just tested it using make V=1.
kernel make does override CFLAGs from the outside.
But that's interesting: my processor supp
On 29/04/15 16:35, Holger Hoffstätte wrote:
On Wed, 29 Apr 2015 15:18:23 +0200, Ralf wrote:
Damn, you're absolutely right.
I just tested it using make V=1.
kernel make does override CFLAGs from the outside.
But that's interesting: my processor supports -march=core-avx2 and none
of the linux k
On Wed, 29 Apr 2015 15:18:23 +0200, Ralf wrote:
> Damn, you're absolutely right.
>
> I just tested it using make V=1.
> kernel make does override CFLAGs from the outside.
>
> But that's interesting: my processor supports -march=core-avx2 and none
> of the linux kernel processor family uses this
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