butterfly_rshB
Synopsis
#include <flint/fft.h>void butterfly_rshB(mp_limb_t * t, mp_limb_t * u, mp_limb_t * i1, mp_limb_t * i2, mp_size_t limbs, mp_size_t x, mp_size_t y)sourceSets t = i_1 / B^x + i_2 / B^y and u = i_1 / B^x - i_2 / B^y modulo p, for 0 \le x, y < \mathit{limbs}. The inputs are overwritten when x \ne y.
Cite this page
The FLINT team, “butterfly_rshB (fft.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/fft/butterfly_rshB.html (generated 2026-10-20).
@misc{flint-doc-fft-butterfly-rshB,
author = {{The FLINT team}},
title = {{butterfly\_rshB (fft.h)}},
howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
year = {2026},
url = {https://flintlib.org/doc/fft/butterfly_rshB.html},
note = {Generated 2026-10-20}
}