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author | Justin Madru <jdm64@gawab.com> | 2009-12-18 15:52:53 -0800 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-03 16:42:33 -0800 |
commit | 8c172dde41db666f7a5f3bb62205da017e23c0ec (patch) | |
tree | ee8f478264aa66e738df8b92cccedecb309816af /Kbuild | |
parent | 096417e087a391dc78780cc1843369a521635522 (diff) |
Staging: s5k3e2fx.c: simplify complexity by factoring
the code was looping, setting s_move[i] to the following calculations
if (actual_step>= 0)
s_move[i] = ((((i + 1) * gain + 0x200) - (i * gain + 0x200)) / 0x400);
else
s_move[i] = ((((i + 1) * gain - 0x200) - (i * gain - 0x200)) / 0x400);
but, this code reduces to the expression
s_move[i] = gain>> 10;
The reason for the complexity was to generate a step function with
integer division and rounding to land on specific values. But these calculations
can be simplified to the following code:
gain = ((actual_step<< 10) / 5)>> 10;
for (i = 0; i<= 4; i++)
s_move[i] = gain;
Signed-off-by: Justin Madru<jdm64@gawab.com>
Reviewed-by: Ray Lee<ray-lk@madrabbit.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Kbuild')
0 files changed, 0 insertions, 0 deletions