[Bug target/39677] AMD Opteron E needs workaround for lock erratum

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39677

Andrew Pinski  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |INVALID

--- Comment #5 from Andrew Pinski  ---
So reading https://www.amd.com/system/files/TechDocs/25759.pdf and errata #147,
the errata only occurs if lock is not there:
The erratum will not occur if there is a LOCK prefix on the read-modify-write
instruction. 

And GCC never emits a cmpxchg without a lock prefix so there is nothing to be
done.

[Bug target/39677] AMD Opteron E needs workaround for lock erratum

[rth at gcc dot gnu dot org]

--- Comment #4 from rth at gcc dot gnu dot org  2009-12-07 16:12 ---
Not working on it any longer.


-- 

rth at gcc dot gnu dot org changed:

   What|Removed |Added

 AssignedTo|rth at gcc dot gnu dot org  |unassigned at gcc dot gnu
   ||dot org
 Status|ASSIGNED|NEW


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39677

[Bug target/39677] AMD Opteron E needs workaround for lock erratum

[rth at gcc dot gnu dot org]

--- Comment #3 from rth at gcc dot gnu dot org  2009-10-13 01:07 ---
Not an openmp bug; we've got to make the change for all code gcc generates.


-- 

rth at gcc dot gnu dot org changed:

   What|Removed |Added

 AssignedTo|unassigned at gcc dot gnu   |rth at gcc dot gnu dot org
   |dot org |
 Status|NEW |ASSIGNED
  Component|middle-end  |target
   Keywords|openmp  |
   Last reconfirmed|2009-04-07 13:42:25 |2009-10-13 01:07:32
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39677