Trait ModPowerOf2

pub trait ModPowerOf2 {
    type Output;

    // Required method
    fn mod_power_of_2(self, other: u64) -> Self::Output;
}

Divides a number by $2^k$, returning just the remainder. The remainder is non-negative.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

Required Associated Types

type Output

Required Methods

fn mod_power_of_2(self, other: u64) -> Self::Output

Implementations on Foreign Types

impl ModPowerOf2 for i8

fn mod_power_of_2(self, pow: u64) -> u8

Divides a number by $2^k$, returning just the remainder. The remainder is non-negative.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Panics

Panics if self is negative and pow is greater than Self::WIDTH.

Examples

See here.

type Output = u8

impl ModPowerOf2 for i16

fn mod_power_of_2(self, pow: u64) -> u16

Divides a number by $2^k$, returning just the remainder. The remainder is non-negative.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Panics

Panics if self is negative and pow is greater than Self::WIDTH.

Examples

See here.

type Output = u16

impl ModPowerOf2 for i32

fn mod_power_of_2(self, pow: u64) -> u32

Divides a number by $2^k$, returning just the remainder. The remainder is non-negative.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Panics

Panics if self is negative and pow is greater than Self::WIDTH.

Examples

See here.

type Output = u32

impl ModPowerOf2 for i64

fn mod_power_of_2(self, pow: u64) -> u64

Divides a number by $2^k$, returning just the remainder. The remainder is non-negative.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Panics

Panics if self is negative and pow is greater than Self::WIDTH.

Examples

See here.

type Output = u64

impl ModPowerOf2 for i128

fn mod_power_of_2(self, pow: u64) -> u128

Divides a number by $2^k$, returning just the remainder. The remainder is non-negative.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Panics

Panics if self is negative and pow is greater than Self::WIDTH.

Examples

See here.

type Output = u128

impl ModPowerOf2 for isize

fn mod_power_of_2(self, pow: u64) -> usize

Divides a number by $2^k$, returning just the remainder. The remainder is non-negative.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Panics

Panics if self is negative and pow is greater than Self::WIDTH.

Examples

See here.

type Output = usize

impl ModPowerOf2 for u8

fn mod_power_of_2(self, pow: u64) -> u8

Divides a number by $2^k$, returning just the remainder.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Examples

See here.

type Output = u8

impl ModPowerOf2 for u16

fn mod_power_of_2(self, pow: u64) -> u16

Divides a number by $2^k$, returning just the remainder.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Examples

See here.

type Output = u16

impl ModPowerOf2 for u32

fn mod_power_of_2(self, pow: u64) -> u32

Divides a number by $2^k$, returning just the remainder.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Examples

See here.

type Output = u32

impl ModPowerOf2 for u64

fn mod_power_of_2(self, pow: u64) -> u64

Divides a number by $2^k$, returning just the remainder.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Examples

See here.

type Output = u64

impl ModPowerOf2 for u128

fn mod_power_of_2(self, pow: u64) -> u128

Divides a number by $2^k$, returning just the remainder.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Examples

See here.

type Output = u128

impl ModPowerOf2 for usize

fn mod_power_of_2(self, pow: u64) -> usize

Divides a number by $2^k$, returning just the remainder.

If the quotient were computed, the quotient and remainder would satisfy $x = q2^k + r$ and $0 \leq r < 2^k$.

$$ f(x, k) = x - 2^k\left \lfloor \frac{x}{2^k} \right \rfloor. $$

Worst-case complexity

Constant time and additional memory.

Examples

See here.

type Output = usize

Implementors