Enum Eightbyte 

pub enum Eightbyte {
    Int,
    Sse,
    None,
}

The class of one eightbyte of a struct or union read out of an argument list, under the x86-64 System V classification (AMD64 psABI 3.2.3).

crate::sema computes it and code generation turns each entry into one next_arg call. There is deliberately no SseUp: the reference implementation this mirrors — rustc_target’s compiler/rustc_target/src/callconv/x86_64.rs — needs that class for SIMD vectors and for the floating types wider than eight bytes, and a C program this crate translates has neither, long double being mapped to double.

Variants

Int

An integer register: read as a u64.

Sse

An SSE register: read as an f64, whose bits are the eightbyte.

None

Nothing of the object reaches this eightbyte — it is padding, which the ABI passes in no register at all, so nothing is read for it.

Trait Implementations

impl Clone for Eightbyte

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 Eightbyte

impl Debug for Eightbyte

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

Formats the value using the given formatter.

impl Eq for Eightbyte

impl PartialEq for Eightbyte

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Eightbyte