Pack and unpack a range of a float into a limited number of bits.

Code functions that pack and unpack a range of a float into a limited number of bits.

unsigned int pack_float(float val, float minVal, float maxVal, int bits);

float unpack_float(unsigned int val, float minVal, float maxVal, int bits);

unsigned int pack_float(float val, float minVal, float maxVal, int bits)

{

    assert(bits >= 0 && bits < 32);

    assert(val >= minVal && val < maxVal);

    return (1U<<bits)*(val-minVal)/(maxVal-minVal);

}

float unpack_float(unsigned int val, float minVal, float maxVal, int bits)

{

    assert(bits >= 0 && bits < 32);

    assert(val < (1U<<bits));

    return val*(maxVal-minVal)/(1U<<bits)+minVal;

}