https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94343
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jbeulich at suse dot com,
| |marxin at gcc dot gnu.org
Last reconfirmed| |2020-03-26
Ever confirmed|0 |1
Target Milestone|--- |10.0
Status|UNCONFIRMED |NEW
Priority|P3 |P1
Known to work| |9.3.0
Known to fail| |10.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
You are right, AVX512VL is not supported with knl.
It started with r10-2016-gff8f129bc2f57fdf:
vpternlogd $0x55, %xmm0, %xmm0, %xmm0
vpcmpeqd %xmm1, %xmm1, %xmm1
vpandn %xmm1, %xmm0, %xmm0
ret
before the revision we emitted:
vpcmpeqd %xmm1, %xmm1, %xmm1
vpxor %xmm1, %xmm0, %xmm0
vpcmpeqd %xmm1, %xmm1, %xmm1
vpandn %xmm1, %xmm0, %xmm0
ret
