pub fn fp4_quant_e8m0_inplace(x: &mut [f32], block: usize)Expand description
2026-09-25: The shims’ fp4_act_quant with e8m0 scales, in place: scale =
power-of-two ceiling of amax / 6 (amax floored at 6 * 2^-126), values
to e2m1, dequantised and rounded to bf16.