Enum cranelift_codegen::ir::condcodes::FloatCC

pub enum FloatCC {
    Ordered,
    Unordered,
    Equal,
    NotEqual,
    OrderedNotEqual,
    UnorderedOrEqual,
    LessThan,
    LessThanOrEqual,
    GreaterThan,
    GreaterThanOrEqual,
    UnorderedOrLessThan,
    UnorderedOrLessThanOrEqual,
    UnorderedOrGreaterThan,
    UnorderedOrGreaterThanOrEqual,
}

Condition code for comparing floating point numbers.

This condition code is used by the fcmp instruction to compare floating point values. Two IEEE floating point values relate in exactly one of four ways:

1. UN - unordered when either value is NaN.
2. EQ - equal numerical value.
3. LT - x is less than y.
4. GT - x is greater than y.

Note that 0.0 and -0.0 relate as EQ because they both represent the number 0.

The condition codes described here are used to produce a single boolean value from the comparison. The 14 condition codes here cover every possible combination of the relation above except the impossible !UN & !EQ & !LT & !GT and the always true UN | EQ | LT | GT.

Variants

Ordered

EQ | LT | GT

Unordered

UN

Equal

EQ

NotEqual

The C ‘!=’ operator is the inverse of ‘==’: NotEqual. UN | LT | GT

OrderedNotEqual

LT | GT

UnorderedOrEqual

UN | EQ

LessThan

LT

LessThanOrEqual

LT | EQ

GreaterThan

GT

GreaterThanOrEqual

GT | EQ

UnorderedOrLessThan

UN | LT

UnorderedOrLessThanOrEqual

UN | LT | EQ

UnorderedOrGreaterThan

UN | GT

UnorderedOrGreaterThanOrEqual

UN | GT | EQ

Implementations

impl FloatCC

pub fn all() -> &'static [FloatCC]

Returns a slice with all possible FloatCC values.

Trait Implementations

impl Clone for FloatCC

fn clone(&self) -> FloatCC

Returns a copy of the value.

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

Performs copy-assignment from source.

impl CondCode for FloatCC

fn inverse(self) -> Self

Get the inverse condition code of self.

fn reverse(self) -> Self

Get the reversed condition code for self.

impl Debug for FloatCC

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

Formats the value using the given formatter.

impl Display for FloatCC

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

Formats the value using the given formatter.

impl From<FloatCC> for FcmpImm

fn from(cond: FloatCC) -> Self

Converts to this type from the input type.

impl FromStr for FloatCC

type Err = ()

The associated error which can be returned from parsing.

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

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

impl Hash for FloatCC

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 FloatCC

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for FloatCC

impl Eq for FloatCC

impl StructuralPartialEq for FloatCC