Enum Exponent 

pub enum Exponent {
    Whole {
        m: u32,
        negative: bool,
    },
    Halves {
        m: u32,
        negative: bool,
    },
    General,
}

How Pow raises to an exponent y. Its slice form reads it once for a constant y, and its scalar form for each item. The JIT’s lowering of a constant power reads it too.

Variants

Whole

x^m, or x^-m where negative, through recipe::power. Positive m goes to MULTIPLIED, or COMPENSATED with fused multiply-add. Negative powers below -1 need fused multiply-add. No result fails.

Fields

m: u32

negative: bool

Halves

√x^m, or 1/√x^m where negative, for m of 1 or 3. Negative three halves needs fused multiply-add for compensated products. √x gives pow’s values at -0 and -∞, and a negative finite x has no real power.

Fields

m: u32

negative: bool

General

Any other y: e^(y ln |x|).

Implementations

impl Exponent

pub fn of(y: f64, fused: bool) -> Self

The route for y, using compensated products only when the operations fuse multiply-add.

Trait Implementations

impl Clone for Exponent

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 Exponent

impl Debug for Exponent

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

Formats the value using the given formatter.

impl Eq for Exponent

impl PartialEq for Exponent

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Exponent