[Bug target/82344] [8 Regression] SPEC CPU2006 435.gromacs ~10% performance regression with trunk@250855

julia.koval at intel dot com gcc-bugzilla@gcc.gnu.org
Thu Sep 28 08:33:00 GMT 2017


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82344

--- Comment #1 from Yulia Koval <julia.koval at intel dot com> ---
Created attachment 42252
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42252&action=edit
RSQRT disable patch

Performance can be fixed on new architectures by disabling Newthon-Raphson.
Unfortunately it causes degradation on Haswell.


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