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author | Darren Hart <dvhart@linux.intel.com> | 2014-01-17 22:25:49 +0000 |
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committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2014-01-28 00:48:22 +0000 |
commit | 4cd33193b2db6c281275db2fb5cc169181955217 (patch) | |
tree | 62f2e4b9676b2c6f3dd9adb6a95df8ae49e11eca /meta/site/ix86-common | |
parent | 1ff914118bdfb19d7f3d794a92ba3735c06ab97b (diff) | |
download | openembedded-core-4cd33193b2db6c281275db2fb5cc169181955217.tar.gz openembedded-core-4cd33193b2db6c281275db2fb5cc169181955217.tar.bz2 openembedded-core-4cd33193b2db6c281275db2fb5cc169181955217.zip |
tune-core2: Replace -mtune=generic with -mtune=core2
-march specifies which ISA to use. -mtune specifies which cpu-type to
optimize instruction ordering for, but not which ISA to use. There are
times when it may make sense to specify mtune=generic and use a more
specific march, such as core2, but the opposite makes little sense at
all: use cpu-type specific ISA, but order the instructions
generically. While the -mtune is implied by -march, gcc does not verify
it is using -mtune=core2 with:
gcc -Q -march=core2 --help=target
Explicitly specify -mtune=core2 to be sure.
Add a comment header describing the CPUs targeted by this tune file.
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Paul Eggleton <paul.eggleton@intel.com>
Cc: Tom Zanussi <tom.zanussi@intel.com>
Cc: Nitin Kamble <nitin.a.kamble@intel.com>
Cc: Mark Hatle <mark.hatle@windriver.com>
Cc: Bruce Ashfield <bruce.ashfield@windriver.com>
Cc: Martin Jansa <martin.jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/site/ix86-common')
0 files changed, 0 insertions, 0 deletions