Trait ModPowerOf2Neg

pub trait ModPowerOf2Neg {
    type Output;

    // Required method
    fn mod_power_of_2_neg(self, pow: u64) -> Self::Output;
}

Negates a number modulo $2^k$. The input must be already reduced modulo $2^k$.

Required Associated Types

type Output

Required Methods

fn mod_power_of_2_neg(self, pow: u64) -> Self::Output

Implementations on Foreign Types

impl ModPowerOf2Neg for u8

fn mod_power_of_2_neg(self, pow: u64) -> u8

Negates a number modulo another number $2^k$. The input must be already reduced modulo $2^k$.

$f(x, k) = y$, where $x, y < 2^k$ and $-x \equiv y \mod 2^k$.

Worst-case complexity

Constant time and additional memory.

Panics

Panics if pow is greater than Self::WIDTH or if self is greater than or equal to $2^k$.

Examples

See here.

type Output = u8

impl ModPowerOf2Neg for u16

fn mod_power_of_2_neg(self, pow: u64) -> u16

Negates a number modulo another number $2^k$. The input must be already reduced modulo $2^k$.

$f(x, k) = y$, where $x, y < 2^k$ and $-x \equiv y \mod 2^k$.

Worst-case complexity

Constant time and additional memory.

Panics

Panics if pow is greater than Self::WIDTH or if self is greater than or equal to $2^k$.

Examples

See here.

type Output = u16

impl ModPowerOf2Neg for u32

fn mod_power_of_2_neg(self, pow: u64) -> u32

Negates a number modulo another number $2^k$. The input must be already reduced modulo $2^k$.

$f(x, k) = y$, where $x, y < 2^k$ and $-x \equiv y \mod 2^k$.

Worst-case complexity

Constant time and additional memory.

Panics

Panics if pow is greater than Self::WIDTH or if self is greater than or equal to $2^k$.

Examples

See here.

type Output = u32

impl ModPowerOf2Neg for u64

fn mod_power_of_2_neg(self, pow: u64) -> u64

Negates a number modulo another number $2^k$. The input must be already reduced modulo $2^k$.

$f(x, k) = y$, where $x, y < 2^k$ and $-x \equiv y \mod 2^k$.

Worst-case complexity

Constant time and additional memory.

Panics

Panics if pow is greater than Self::WIDTH or if self is greater than or equal to $2^k$.

Examples

See here.

type Output = u64

impl ModPowerOf2Neg for u128

fn mod_power_of_2_neg(self, pow: u64) -> u128

Negates a number modulo another number $2^k$. The input must be already reduced modulo $2^k$.

$f(x, k) = y$, where $x, y < 2^k$ and $-x \equiv y \mod 2^k$.

Worst-case complexity

Constant time and additional memory.

Panics

Panics if pow is greater than Self::WIDTH or if self is greater than or equal to $2^k$.

Examples

See here.

type Output = u128

impl ModPowerOf2Neg for usize

fn mod_power_of_2_neg(self, pow: u64) -> usize

Negates a number modulo another number $2^k$. The input must be already reduced modulo $2^k$.

$f(x, k) = y$, where $x, y < 2^k$ and $-x \equiv y \mod 2^k$.

Worst-case complexity

Constant time and additional memory.

Panics

Panics if pow is greater than Self::WIDTH or if self is greater than or equal to $2^k$.

Examples

See here.

type Output = usize

Implementors