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I discovered there's average and shuffle instructions which simplify the
calculations of UV components. Also the extract instruction was very useful.
In terms of the algorithm I rearranged the memory reads to be sequential.
Overall this gives about 10% improvement on 64-bits machine.
On 32-bits machine this gives 20% improvement. If compiled as 32-bits code this is
quite slow compared to 64-bits, about 2x slow down. So working on MMX code will
be a direction for improvement.
BUG=None
TEST=I tried it, it looks right.
Review URL: http://codereview.chromium.org/6488014
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@74827 0039d316-1c4b-4281-b951-d872f2087c98
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This will make text in chromoting view to looks much nicer.
BUG=72218
TEST=Text looks much better in chromoting
Review URL: http://codereview.chromium.org/6410127
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@74154 0039d316-1c4b-4281-b951-d872f2087c98
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Introduce SSE2 patch again.
BUG=None
TEST=None
Review URL: http://codereview.chromium.org/6334029
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@73552 0039d316-1c4b-4281-b951-d872f2087c98
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Reverting patch because ARM build is broken.
TBR=ctguil
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@73341 0039d316-1c4b-4281-b951-d872f2087c98
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This code uses SSE2 intrinsics with the feature of 2x2 subsampling for U and V.
Performance compared to a pure C version is about 20% faster with better
quality.
BUG=None
TEST=None
Review URL: http://codereview.chromium.org/6268018
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@73339 0039d316-1c4b-4281-b951-d872f2087c98
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