Struct Ieee128

#[repr(C)]
pub struct Ieee128(/* private fields */);

An IEEE binary128 immediate floating point value, represented as a u128 containing the bit pattern.

We specifically avoid using a f128 here since some architectures may silently alter floats. See: https://github.com/bytecodealliance/wasmtime/pull/2251#discussion_r498508646

The PartialEq and Hash implementations are over the underlying bit pattern, but PartialOrd respects IEEE754 semantics.

All bit patterns are allowed.

Implementations

impl Ieee128

pub fn with_bits(x: u128) -> Self

Create a new Ieee128 containing the bits of x.

pub fn bits(self) -> u128

Get the bitwise representation.

pub fn is_zero(&self) -> bool

Returns true if self is positive or negative zero

Trait Implementations

impl Clone for Ieee128

fn clone(&self) -> Ieee128

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Ieee128

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

Formats the value using the given formatter.

impl Display for Ieee128

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

Formats the value using the given formatter.

impl From<Ieee128> for DataValue

fn from(data: Ieee128) -> Self

Converts to this type from the input type.

impl FromStr for Ieee128

type Err = &'static str

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, &'static str>

Parses a string s to return a value of this type.

impl Hash for Ieee128

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 Ieee128

fn eq(&self, other: &Ieee128) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Ieee128

fn partial_cmp(&self, rhs: &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 TryInto<Ieee128> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<Ieee128, Self::Error>

Performs the conversion.

impl Copy for Ieee128

impl Eq for Ieee128

impl StructuralPartialEq for Ieee128