Struct Opcode 

pub struct Opcode(/* private fields */);

A machine opcode: an index into the target’s instruction table.

Every target’s table begins with the two generic pseudo-instructions Opcode::COPY and Opcode::PCOPY; the rest are the target’s own (for x86-64, the constants in x86_64::op).

Examples

use backend_lang::target::Opcode;
use backend_lang::x86_64::{self, op};

assert_eq!(x86_64::TARGET.inst(Opcode::COPY).unwrap().name(), "copy");
assert_eq!(x86_64::TARGET.inst(op::ADD64).unwrap().name(), "add64");

Implementations

impl Opcode

pub const COPY: Opcode

dst = copy src: one move between registers, stack slots, or from an immediate. Lowered through the parallel-move resolver, so a slot-to-slot copy gets a temporary register as the target requires. A copy’s width is its register’s class; a copy with no register (slot to slot, or an immediate to a slot) moves a value of the target’s address class (8 bytes on x86-64).

pub const PCOPY: Opcode

d0, d1, ... = pcopy s0, s1, ...: a parallel copy. Every source is read before any destination is written, as on a control-flow edge. Lowered through the parallel-move resolver.

pub const fn new(index: u16) -> Opcode

The opcode with index index in a target’s table.

Examples

use backend_lang::target::Opcode;

assert_eq!(Opcode::new(0), Opcode::COPY);

pub const fn index(self) -> usize

The opcode’s index in the target’s instruction table.

Examples

use backend_lang::target::Opcode;

assert_eq!(Opcode::PCOPY.index(), 1);

Trait Implementations

impl Clone for Opcode

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 Opcode

impl Debug for Opcode

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

Formats the value using the given formatter.

impl Eq for Opcode

impl Hash for Opcode

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 Opcode

fn cmp(&self, other: &Self) -> 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 Opcode

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Opcode

fn partial_cmp(&self, other: &Self) -> 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 Opcode