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;
}