Enum AddrMode 

pub enum AddrMode {
    Base,
    BaseDisp,
    BaseIndex,
    BaseIndexScale,
    BaseIndexScaleDisp,
}

The shape of a memory address, which is what an addressing mode table is indexed by.

Section 40.9 wants these costed per target and wants the complexity counted per structural feature, and AddrMode::complexity is that count. A mode the target does not have is Cycles::INFINITE in the table rather than absent from it, so that a pass asking about a mode gets an answer it can compare instead of an Option it has to unwrap into a policy.

Variants

Base

[base].

BaseDisp

[base + disp].

BaseIndex

[base + index].

BaseIndexScale

[base + index * scale].

BaseIndexScaleDisp

[base + index * scale + disp].

Implementations

impl AddrMode

pub const ALL: [Self; 5]

Every mode, in order.

pub const fn index(self) -> usize

Where this mode sits in a mode-indexed field.

pub const fn complexity(self) -> u32

How many structural features this mode has, per section 40.9.

One each for a displacement, an index, and a scale on the index. The base is not counted because every mode has one, and a feature every mode has cannot discriminate between them.

This is the absolute count. Section 40.9’s refinement, that a feature the target has no alternative to should not count against a mode, is applied by CostTable::addr_cost, which is where the target is known.

pub const fn scales(self) -> bool

Whether this mode scales its index.

Trait Implementations

impl Clone for AddrMode

fn clone(&self) -> AddrMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AddrMode

impl Debug for AddrMode

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

Formats the value using the given formatter.

impl Eq for AddrMode

impl Hash for AddrMode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for AddrMode

fn cmp(&self, other: &AddrMode) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for AddrMode

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for AddrMode

fn partial_cmp(&self, other: &AddrMode) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for AddrMode