Christophe GISQUET 272b252c01 rv40dsp: implement prescaled versions for biweight. ...

Quite often, the original weights are multiple of 512. By prescaling them
by 1/512 when they are computed (once per frame), no intermediate shifting
is needed, and no prescaling on each call either.

The x86 code already used that trick.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

2012-04-10 10:06:48 -07:00

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