Enum SubArch 

pub enum SubArch {
    None,
    ArmV5Te,
    ArmV6,
    ArmV6M,
    ArmV7A,
    ArmV7R,
    ArmV7M,
    ArmV7Em,
    ArmV8A,
    ArmV8M,
}

A baseline within an architecture family.

This carries only the baselines that appear in the leading component of a tuple, which in practice means the ARM ones. spec/cross-compile/03-target-model.md section 3.3 also lists micro architecture levels such as x86-64-v3 and RISC-V profiles such as rva23u64 as candidates for this field, and they are not here on purpose.

The reason is the rule that section states two paragraphs later: a thing belongs in the tuple if it changes how a function is called or how a struct is laid out. Two objects built for x86-64-v2 and x86-64-v3 link together and call each other correctly, so they are the same target and a different -march. Two objects built for armv7a and armv6m are not. Keeping levels out of the tuple is what keeps the tuple’s own invariant true, namely that equal tuples means interchangeable objects, and that invariant is what lets a tuple be a cache key. Levels and profiles arrive with the feature set in a later milestone.

Variants

None

The family’s own baseline, and the only legal value for every family except ARM.

ArmV5Te

ARMv5TE, the floor for the older soft-float Linux ports.

ArmV6

ARMv6.

ArmV6M

ARMv6-M, the Cortex-M0 class. Thumb only.

ArmV7A

ARMv7-A, which is what almost every 32-bit Linux ARM target means.

ArmV7R

ARMv7-R, the real-time profile.

ArmV7M

ARMv7-M, the Cortex-M3 and M4 class. Thumb only.

ArmV7Em

ARMv7E-M.

ArmV8A

ARMv8-A in its 32-bit form.

ArmV8M

ARMv8-M baseline and mainline, folded into one value because the difference is a feature set rather than a different tuple.

Implementations

impl SubArch

pub const fn as_str(self) -> &'static str

The text this baseline contributes to the leading component, or the empty string.

pub const fn belongs_to(self, arch: Arch) -> bool

Whether this baseline belongs to the given family.

pub const fn is_thumb_only(self) -> bool

Whether the baseline executes Thumb instructions only, which decides the default instruction set and, on the M profile, rules out the A profile’s float ABIs.

Trait Implementations

impl Clone for SubArch

fn clone(&self) -> SubArch

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SubArch

impl Debug for SubArch

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

Formats the value using the given formatter.

impl Default for SubArch

fn default() -> SubArch

Returns the “default value” for a type.

impl Eq for SubArch

impl Hash for SubArch

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 SubArch

fn cmp(&self, other: &SubArch) -> 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 SubArch

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for SubArch

fn partial_cmp(&self, other: &SubArch) -> 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 SubArch