Enum ScalarReason 

pub enum ScalarReason {
    Forced,
    DimNotSimdAligned,
    NoNibbleTables,
    CpuUnsupported,
    SelfCheckFailed,
}

Why the scalar path runs.

Variants

Forced

Lut::force_scalar or MAXSIM_LUT_FORCE_SCALAR=1.

DimNotSimdAligned

dim % 8 != 0 or dim > MAX_DIM.

NoNibbleTables

The packing could not be factored into nibble tables (nbits 8).

CpuUnsupported

This CPU lacks the required feature (NEON dotprod, AVX2), or the architecture has no SIMD path at all.

SelfCheckFailed

Every SIMD kernel this CPU claims to support disagreed with the scalar reference on the calibration probe, so none was trusted. This should be unreachable; it means a kernel is miscompiled or the CPU misreports a feature, and it trades speed for a correct answer.

Trait Implementations

impl Clone for ScalarReason

fn clone(&self) -> ScalarReason

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ScalarReason

impl Debug for ScalarReason

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

Formats the value using the given formatter.

impl Eq for ScalarReason

impl PartialEq for ScalarReason

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ScalarReason