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| author | Steven Fuerst <svfuerst@gmail.com> | 2012-08-15 15:07:15 -0700 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2012-09-20 13:10:34 -0400 |
| commit | 747f49ba67b8895a5831ab539de551b916f3738c (patch) | |
| tree | b1b1561ae97f9f7fdab8ae44e019bd5dca0e62e4 /init | |
| parent | 7ff64fcaa7b7ba62d12758e49643f31dd9e90ece (diff) | |
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>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions