Enum cranelift_codegen_meta::isa::x86::recipes::RexRecipeKind

pub enum RexRecipeKind {
    Unspecified,
    NeverEmitRex,
    AlwaysEmitRex,
    InferRex,
}

Specifies how the REX prefix is emitted by a Recipe.

Variants

Unspecified

The REX emission behavior is not hardcoded for the Recipe and may be overridden when using the Template.

NeverEmitRex

The Recipe must hardcode the non-emission of the REX prefix.

AlwaysEmitRex

The Recipe must hardcode the emission of the REX prefix.

InferRex

The Recipe should infer the emission of the REX.RXB bits from registers, and the REX.W bit from the EncodingBits.

Because such a Recipe has a non-constant instruction size, it must have a special compute_size handler for the inferrable-REX case.

Trait Implementations

impl Clone for RexRecipeKind

fn clone(&self) -> RexRecipeKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for RexRecipeKind

impl Default for RexRecipeKind

fn default() -> Self

Returns the "default value" for a type.

impl PartialEq<RexRecipeKind> for RexRecipeKind

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

This method tests for self and other values to be equal, and is used by ==.

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl StructuralPartialEq for RexRecipeKind