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Struct BatchInverter

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pub struct BatchInverter {}
Expand description

A non-allocating batch inverter.

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impl BatchInverter

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pub fn invert_with_external_scratch<F>( elements: &mut [F], scratch_space: &mut [F], ) -> F
where F: Field + ConstantTimeEq,

Inverts each field element in elements (when nonzero). Zero-valued elements are left as zero.

  • scratch_space is a slice of field elements that can be freely overwritten.

Returns the inverse of the product of all nonzero field elements.

§Panics

This function will panic if elements.len() != scratch_space.len().

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pub fn invert_with_internal_scratch<F, T, TE, TS>( items: &mut [T], element: TE, scratch_space: TS, ) -> F
where F: Field + ConstantTimeEq, TE: Fn(&mut T) -> &mut F, TS: Fn(&mut T) -> &mut F,

Inverts each field element in items (when nonzero). Zero-valued elements are left as zero.

  • element is a function that extracts the element to be inverted from items.
  • scratch_space is a function that extracts the scratch space from items.

Returns the inverse of the product of all nonzero field elements.

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