//FIXME log, exp, pow
/**
- * Converts a mantisse and exponent to a SoftFloat
- * @returns a SoftFloat with value v * 2^frac_bits
+ * Converts a mantisse and exponent to a SoftFloat.
+ * This converts a fixed point value v with frac_bits fractional bits to a
+ * SoftFloat.
+ * @returns a SoftFloat with value v * 2^-frac_bits
*/
static inline av_const SoftFloat av_int2sf(int v, int frac_bits){
int exp_offset = 0;