Struct arpfloat::Semantics

pub struct Semantics {
    pub exponent: usize,
    pub precision: usize,
}

Controls the semantics of a floating point number using two fields: ‘precision’, that determines the number of bits, and ‘exponent’ that controls the dynamic range of the number.

Fields

exponent: usize

The number of bits that define the range of the exponent.

precision: usize

The number of bits in the significand (mantissa + 1).

Implementations

impl Semantics

pub const fn new(exponent: usize, precision: usize) -> Self

Examples found in repository

examples/print_bench.rs (line 7)

fn main() {
    let sem = Semantics::new(32, 5000);
    let val = Float::e(sem);
    println!("F64: {}", val.as_f64());
    println!("FP*: {}", val);
}

pub fn get_precision(&self) -> usize

Returns the precision in bits.

pub fn get_mantissa_len(&self) -> usize

Returns the length of the mantissa in bits (precision - 1).

pub fn get_exponent_len(&self) -> usize

Returns the length of the exponent in bits, which defines the valid range.

pub fn increase_precision(&self, more: usize) -> Semantics

Create a new float semantics with increased precision with ‘add’ additional digits.

pub fn grow_log(&self, more: usize) -> Semantics

Create a new float semantics with increased precision with ‘add’ additional digits, plus ceil(log2) of the number.

pub fn increase_exponent(&self, more: usize) -> Semantics

Create a new float semantics with increased exponent with ‘more’ additional digits.

Trait Implementations

impl Clone for Semantics

fn clone(&self) -> Semantics

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Semantics

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

Formats the value using the given formatter.

impl PartialEq<Semantics> for Semantics

fn eq(&self, other: &Semantics) -> 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 Semantics

impl StructuralPartialEq for Semantics