Enum Nvfp4Act 

pub enum Nvfp4Act {
    Unstamped,
    A4,
    Wide,
}

2026-09-28: The activation format the policy set for one NVFP4 weight, which the loader stamps on it (QuantizedWeight::act).

Variants

Unstamped

2026-09-28: No stamp: the loader does not consult the policy, or the tier is nvfp4. Decode follows the published tier’s lever, and prefill may run FP4 activations (the dense-FFN MMQ arm), as before the plan existed.

A4

2026-09-28: The checkpoint declares FP4 input activations (W4A4): decode and prefill run them FP4.

Wide

2026-09-28: The checkpoint declares wider activations (A8 or A16): no FP4 activations in decode or prefill.

Implementations

impl Nvfp4Act

pub fn combine(parts: impl IntoIterator<Item = Nvfp4Act>) -> Nvfp4Act

2026-09-28: The stamp of a weight built from parts (a fused concatenation): FP4 only when every part is, Wide when any part is, else unstamped.

pub fn allows_fp4_prefill(self) -> bool

2026-09-28: Whether prefill may quantize this weight’s activations to FP4.

Trait Implementations

impl Clone for Nvfp4Act

fn clone(&self) -> Nvfp4Act

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Nvfp4Act

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Nvfp4Act

fn default() -> Nvfp4Act

Returns the “default value” for a type.

impl PartialEq for Nvfp4Act

fn eq(&self, other: &Nvfp4Act) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Nvfp4Act

impl Eq for Nvfp4Act

impl StructuralPartialEq for Nvfp4Act