This speeds up memset by copying a word at a time.
Ran the unit test on Peppy:
> runtest
...
Running test_memset... (speed gain: 141532 -> 32136 us) OK
...
Ran make buildall:
...
Running test_memset... (speed gain: 1338 -> 280 us) OK
...
TEST=Described above.
BUG=chrome-os-partner:23720
BRANCH=none
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Change-Id: If34b06ad70f448d950535a4bea4f6556627a9b6f
Tested-by: Daisuke Nojiri <dnojiri@google.com>
Reviewed-on: https://chromium-review.googlesource.com/185936
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Queue: Daisuke Nojiri <dnojiri@google.com>