On 5/7/24 20:44, Toon Moene wrote:
On 5/7/24 20:35, Andrew Pinski wrote:
On Tue, May 7, 2024 at 11:31 AM Toon Moene wrote:
On 5/7/24 00:02, Toon Moene wrote:
OK, perhaps on the aarch64 I need the following option to make the
comparison fair:
‘rdma’
Enable Round Double Multiply Acc
On 5/7/24 20:35, Andrew Pinski wrote:
On Tue, May 7, 2024 at 11:31 AM Toon Moene wrote:
On 5/7/24 00:02, Toon Moene wrote:
OK, perhaps on the aarch64 I need the following option to make the
comparison fair:
‘rdma’
Enable Round Double Multiply Accumulate instructions. This is on by
d
On Tue, May 7, 2024 at 11:31 AM Toon Moene wrote:
>
> On 5/7/24 00:02, Toon Moene wrote:
>
> > OK, perhaps on the aarch64 I need the following option to make the
> > comparison fair:
> >
> > ‘rdma’
> >
> > Enable Round Double Multiply Accumulate instructions. This is on by
> > default for -ma
On 5/7/24 00:02, Toon Moene wrote:
OK, perhaps on the aarch64 I need the following option to make the
comparison fair:
‘rdma’
Enable Round Double Multiply Accumulate instructions. This is on by
default for -march=armv8.1-a.
I.e., -mno-rdma
(I hope that's correct - I'll will try that
On 5/6/24 23:35, Toon Moene wrote:
On 5/6/24 23:32, Andrew Pinski wrote:
Did you test x86_64 with -march=native (or with -mfma) or just -O3?
The reason why I am asking is aarch64 includes FMA by default while
x86_64 does not.
Most recent x86_64 includes an FMA instruction but since the base IS
On 5/6/24 23:32, Andrew Pinski wrote:
Did you test x86_64 with -march=native (or with -mfma) or just -O3?
The reason why I am asking is aarch64 includes FMA by default while
x86_64 does not.
Most recent x86_64 includes an FMA instruction but since the base ISA
does not include it, it is not enab
On Mon, May 6, 2024 at 2:27 PM Toon Moene wrote:
>
> I have now, for some time, ran LAPACK's test programs on my gcc/gfortran
> builds on both on the x86_64-linux-gnu architecture, as well as the
> aarch64-linux-gnu one (see, e.g.,
> http://moene.org/~toon/lapack-amd64-gfortran13-O3).
>
> The resu
