Struct SubgroupSimulator 

pub struct SubgroupSimulator { /* private fields */ }

Deterministic CPU model of a hardware subgroup/wave.

Implementations

impl SubgroupSimulator

pub fn new(width: usize) -> Self

Construct a simulator with a fixed subgroup width.

pub const fn width(&self) -> usize

Configured subgroup width.

pub fn ballot<const N: usize>(&self, mask: &[bool; N]) -> u32

Encode lane predicates as a ballot bitmask.

pub fn ballot_slice(&self, mask: &[bool]) -> u32

Encode an arbitrary lane predicate slice as a ballot bitmask.

pub fn shuffle(&self, values: &[u32], src_lanes: &[u32]) -> Vec<u32>

Permute values by source-lane indices.

pub fn add(&self, values: &[u32]) -> u32

Wrapping sum reduction across active lanes.

pub fn subgroup_bounds( &self, lane_count: usize, lane_index: usize, ) -> (usize, usize)

Bounds of the subgroup containing lane_index within lane_count.

Trait Implementations

impl Clone for SubgroupSimulator

fn clone(&self) -> SubgroupSimulator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SubgroupSimulator

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

Formats the value using the given formatter.

impl Default for SubgroupSimulator

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for SubgroupSimulator

fn eq(&self, other: &SubgroupSimulator) -> 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 SubgroupSimulator

impl Eq for SubgroupSimulator

impl StructuralPartialEq for SubgroupSimulator