Struct StrengthReductionPass 

pub struct StrengthReductionPass {
    pub reductions: u32,
}

Strength reduction: replaces expensive operations with cheaper equivalents. For example, multiplication by a power of 2 becomes a left shift.

Fields

reductions: u32

Implementations

impl StrengthReductionPass

pub fn new() -> Self

pub fn is_power_of_two(n: u64) -> bool

Check if a value is a power of two.

pub fn log2_exact(n: u64) -> Option<u32>

Compute log2 for a power of two, returning None if not a power of two.

pub fn is_mask(n: u64) -> bool

Check if a value is a power of two minus one (e.g. 0x7F, 0xFF, 0xFFFF).

pub fn ctz(n: u64) -> u32

Count trailing zeros.

pub fn clz(n: u64) -> u32

Count leading zeros.

pub fn popcount(n: u64) -> u32

Population count (number of set bits).

Trait Implementations

impl Debug for StrengthReductionPass

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

Formats the value using the given formatter.

impl Default for StrengthReductionPass

fn default() -> Self

Returns the “default value” for a type.