Enum ImmRange 

#[non_exhaustive]
pub enum ImmRange {
    None,
    I8,
    U8,
    I16,
    I32,
    I64,
}

The values an immediate operand may take.

Immediates are signed values of the operation’s width, as isa-lang takes them (TARGET-DESC §3.1): for a 32-bit operation, all ones is -1.

Examples

use backend_lang::target::ImmRange;

assert!(ImmRange::I8.fits(-128));
assert!(!ImmRange::I8.fits(128));
assert!(ImmRange::U8.fits(255));
assert!(!ImmRange::None.fits(0));

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

None

No immediate is accepted.

I8

-128..=127.

U8

0..=255.

I16

-32768..=32767.

I32

-2^31..=2^31-1.

I64

Any 64-bit value.

Implementations

impl ImmRange

pub const fn fits(self, value: i64) -> bool

Whether value is in the range.

Examples

use backend_lang::target::ImmRange;

assert!(ImmRange::I32.fits(i64::from(i32::MIN)));
assert!(!ImmRange::I32.fits(1 << 31));
assert!(ImmRange::I64.fits(i64::MIN));

Trait Implementations

impl Clone for ImmRange

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 ImmRange

impl Debug for ImmRange

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

Formats the value using the given formatter.

impl Eq for ImmRange

impl Hash for ImmRange

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 PartialEq for ImmRange

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ImmRange