const RGB9E5_EXPONENT_BITS: u32 = 5u

const RGB9E5_MANTISSA_BITS: AbstractInt = 9

const RGB9E5_MANTISSA_BITSU: u32 = 9u

const RGB9E5_EXP_BIAS: AbstractInt = 15

const RGB9E5_MAX_VALID_BIASED_EXP: u32 = 31u

const MAX_RGB9E5_EXP: u32 = 16u

const RGB9E5_MANTISSA_VALUES: AbstractInt = 512

const MAX_RGB9E5_MANTISSA: AbstractInt = 511

const MAX_RGB9E5_MANTISSAU: u32 = 511u

const MAX_RGB9E5_: AbstractFloat = 65408.0

const EPSILON_RGB9E5_: AbstractFloat = 0.000000059604645

fn floor_log2_ ( ) -> i32

fn vec3_to_rgb9e5_ ( ) -> u32

fn extract_bits ( ,  ,  ) -> u32

fn rgb9e5_to_vec3_ ( ) -> vec3<f32>