float-exponent
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Extracts the previous power of 2 floating point number
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float-exponent
==============
Extracts the exponent from a floating point number, effectively rounding down to the previous power of 2 for non-denormal numbers. For denormals returns 2^-1024.
#### `require('float-exponent')(x)`
Returns the previous power of 2 for `x`
# License
(c) 2015 Mikola Lysenko. MIT License