Struct LowerFp4Cast 

pub struct LowerFp4Cast { /* private fields */ }

Lowers every cast from or to e2m1x2 onto the software codec, for a backend that has no native fp4 conversion.

The decode goes through f16 pairs ([e2m1_words_to_f16]) where the backend has f16, and through f32 ([e2m1_bits_to_float]) where it does not: the pairs decode two codes for what the f32 path spends on one and need no select, and the backend is what knows whether f16 exists. A cast whose bytes fill whole words decodes a word at a time, codes four apart sharing a pair. The encode is [float_to_e2m1_bits] either way.

Implementations

impl LowerFp4Cast

pub fn new(half: bool, container: Fp8Container) -> Self

Constructs a new LowerFp4Cast.

Trait Implementations

impl Clone for LowerFp4Cast

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LowerFp4Cast

impl Debug for LowerFp4Cast

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

Formats the value using the given formatter.

impl Default for LowerFp4Cast

fn default() -> Self

Returns the “default value” for a type.

impl MatchRewrite for LowerFp4Cast

fn match(&mut self, ctx: &Context, op: Ptr<Operation>) -> bool

Should operation be rewritten?

fn rewrite( &mut self, ctx: &mut Context, rewriter: &mut MatchRewriter, op: Ptr<Operation>, ) -> Result<()>

Rewrite the matched operation. Insertion point is set to be before the operation being rewritten.

impl NamedRewrite for LowerFp4Cast

fn name(&self) -> &str