[Solved] Finding closest power of 2 for any float at compile time

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This does it: 

#define CALC_SCALE ( x > 16 ? 32 : x > 8 ? 16 : x > 4 ? 8 : x > 2 ? 4 : x > 1 ? 2 : 1 )

At compile time: 

int x = CALC_SCALE( 13 );

is compiled to: 

int x = 16;

This can easily be changed to support floats.

solved Finding closest power of 2 for any float at compile time