pub fn dequant_vbit(
bytes: &[u8],
rows: usize,
cols: usize,
dst: &mut [f32],
) -> Result<(), String>Expand description
Dequantize a full vbit tensor (P13 FIG.3, grouped variant):
[u8 bits: rows][f16 scales: rows·cols/32][bit-packed rows MSB-first,
each row padded to a whole byte]. w = (u − L)·scale, L = 2^{b−1}−1.