Per-window precomputed slice parameters for the carry-less signed-Booth window recoding. Read out by the per-(point, window) hot loop as two i32 loads + a fixed bit-twiddle (no branches, no per-iter address arithmetic). More...

#include <booth_recode.hpp>

Public Attributes
uint32_t	lo_mask

uint32_t	hi_mask

uint32_t	lo_limb

uint32_t	hi_limb

uint32_t	lo_off

uint32_t	lo_bits

bool	slice_localised_to_one_u64

Detailed Description

Per-window precomputed slice parameters for the carry-less signed-Booth window recoding. Read out by the per-(point, window) hot loop as two i32 loads + a fixed bit-twiddle (no branches, no per-iter address arithmetic).

slice_localised_to_one_u64: true iff every bit of the (c+1)-bit window lives inside a single uint64 limb. Callers that have a single-load fast path branch on this; callers that don't can ignore it (the field is one bool — zero cost).

Definition at line 27 of file booth_recode.hpp.

Member Data Documentation

◆ hi_limb

uint32_t bb::ecc::booth::BoothSliceParams::hi_limb

Definition at line 31 of file booth_recode.hpp.

◆ hi_mask

uint32_t bb::ecc::booth::BoothSliceParams::hi_mask

Definition at line 29 of file booth_recode.hpp.

◆ lo_bits

uint32_t bb::ecc::booth::BoothSliceParams::lo_bits

Definition at line 33 of file booth_recode.hpp.

◆ lo_limb

uint32_t bb::ecc::booth::BoothSliceParams::lo_limb

Definition at line 30 of file booth_recode.hpp.

◆ lo_mask

uint32_t bb::ecc::booth::BoothSliceParams::lo_mask

Definition at line 28 of file booth_recode.hpp.

◆ lo_off

uint32_t bb::ecc::booth::BoothSliceParams::lo_off

Definition at line 32 of file booth_recode.hpp.

◆ slice_localised_to_one_u64

bool bb::ecc::booth::BoothSliceParams::slice_localised_to_one_u64

Definition at line 34 of file booth_recode.hpp.

The documentation for this struct was generated from the following file:

src/barretenberg/ecc/groups/booth_recode.hpp

Public Attributes