| 1 |
>>>>> "AC" == Amar Cosic <amar.cosic@×××××.com> writes: |
| 2 |
|
| 3 |
AC> Couple months ago I tried this |
| 4 |
AC> http://en.gentoo-wiki.com/wiki/Safe_Cflags/AMD#AMD_FX-8xxx.2F6xxx.2F4xxx_.28Bulldozer.29 |
| 5 |
|
| 6 |
Those flags are silly. |
| 7 |
|
| 8 |
Specifying -march=bderv1 already enables all of the rest of those -m flags. |
| 9 |
|
| 10 |
You will need to use gcc-4.6 or later to have -march=bderv1, otherwise |
| 11 |
try -march=native and/or -march=amdfam10. |
| 12 |
|
| 13 |
Iff you enable the graphite USE flag, you can add: |
| 14 |
|
| 15 |
-floop-interchange -floop-strip-mine -floop-block |
| 16 |
|
| 17 |
to enable the graphite optimizations. |
| 18 |
|
| 19 |
If you do install gcc-4.6.2, try these to confirm what native offers: |
| 20 |
|
| 21 |
:; echo | gcc -dM -E - -march=bdver1 | sort >gcc-info-bdver1 |
| 22 |
:; echo | gcc -dM -E - -march=native | sort >gcc-info-native |
| 23 |
|
| 24 |
A diff(1) of those two files should be empty. |
| 25 |
|
| 26 |
-JimC |
| 27 |
-- |
| 28 |
James Cloos <cloos@×××××××.com> OpenPGP: 1024D/ED7DAEA6 |
Archives