I am trying to figure out how the top-consuming routines in our weather
models will be compiled when using AVX512 instructions (and their 32 512
bit registers).
I thought an up-to-date trunk version of gcc, using the command line:
<...>/gfortran -Ofast -S -mavx2 -mavx512f <source code>
would do that.
Unfortunately, I do not see any use of the new zmm.. registers, which
might mean that AVX512 isn't used yet.
This is how the nightly build job builds the trunk gfortran compiler:
configure --prefix=/home/toon/compilers/install --with-gnu-as
--with-gnu-ld --enable-languages=fortran<,other-language>
--disable-multilib --disable-nls --with-arch=core-avx2 --with-tune=core-avx2
Is it the --with-arch=core-avx2 ? Or perhaps the --with-gnu-as
--with-gnu-ld (because the installed ones do not support AVX512 yet ?).
Thanks in advance,
--
Toon Moene - e-mail: t...@moene.org - phone: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
At home: http://moene.org/~toon/; weather: http://moene.org/~hirlam/
Progress of GNU Fortran: http://gcc.gnu.org/wiki/GFortran#news
