From: Steven Fuerst <svfuerst@gmail.com>
Date: Wed, 15 Aug 2012 22:07:15 +0000 (-0700)
Subject: Replace int2float() with an optimized version.
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~20^2~3^2~70
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=747f49ba67b8895a5831ab539de551b916f3738c;p=pandora-kernel.git

Replace int2float() with an optimized version.

We use __fls() to find the most significant bit.  Using that, the
loop can be avoided.  A second trick is to use the behaviour of the
rotate instructions to expand the range of the unsigned int to float
conversion to the full 32 bits in a branchless way.

The routine is now exact up to 2^24.  Above that, we truncate which
is equivalent to rounding towards zero.

Signed-off-by: Steven Fuerst <svfuerst@gmail.com>
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