halo2_ecc::bigint

Struct FixedOverflowInteger

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#[repr(transparent)]
pub struct FixedOverflowInteger<F: ScalarField> {
    pub limbs: Vec<F>,
}

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§limbs: Vec<F>

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impl<F: BigPrimeField> FixedOverflowInteger<F>

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pub fn construct(limbs: Vec<F>) -> Self

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pub fn from_native(value: &BigUint, num_limbs: usize, limb_bits: usize) -> Self

Input: a BigInteger value, Output: the FixedOverflowInteger that represents the same value Can handle signs Note the representation of the integer will be in proper (no overflow) format, if signs are interpretted correctly

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pub fn to_bigint(&self, limb_bits: usize) -> BigUint

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pub fn assign(self, ctx: &mut Context<F>) -> ProperUint<F>

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pub fn select_by_indicator( gate: &impl GateInstructions<F>, ctx: &mut Context<F>, a: &[Self], coeffs: &[AssignedValue<F>], limb_bits: usize, ) -> OverflowInteger<F>

only use case is when coeffs has only a single 1, rest are 0

Trait Implementations§

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impl<F: Clone + ScalarField> Clone for FixedOverflowInteger<F>

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fn clone(&self) -> FixedOverflowInteger<F>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<F: Debug + ScalarField> Debug for FixedOverflowInteger<F>

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

Formats the value using the given formatter. Read more

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impl<F, Fp, Pt, FC> Selectable<F, Reduced<Pt, Fp>> for FC
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fn select( &self, ctx: &mut Context<F>, a: Reduced<Pt, Fp>, b: Reduced<Pt, Fp>, sel: AssignedValue<F>, ) -> Reduced<Pt, Fp>

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fn select_by_indicator( &self, ctx: &mut Context<F>, a: &impl AsRef<[Reduced<Pt, Fp>]>, coeffs: &[AssignedValue<F>], ) -> Reduced<Pt, Fp>

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