`_nmod_vec_nored_scalar_addmul_halflimb, _nmod_vec_nored_scalar_addmul_halflimb_avx2`

Synopsis#include <flint/nmod_vec.h>

void _nmod_vec_nored_scalar_addmul_halflimb(nn_ptr res, nn_srcptr vec, slong len, ulong c)source

void _nmod_vec_nored_scalar_addmul_halflimb_avx2(nn_ptr res, nn_srcptr vec, slong len, ulong c)source

Sets $r_i \gets r_i + c \, v_i$ for $0 \le i < \mathit{len}$ without reduction, where $v_i$ is vec[i] and $r_i$ is the single limb res[i]. Requires $c, v_i < 2^{\mathtt{FLINT\_BITS}/2}$ and $r_i + c v_i < 2^{\mathtt{FLINT\_BITS}}$ . The AVX2 version is only declared on 64-bit machines with AVX2, where the first function uses it from length 16 on.

Cite this page

The FLINT team, “_nmod_vec_nored_scalar_addmul_halflimb, _nmod_vec_nored_scalar_addmul_halflimb_avx2 (nmod_vec.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/nmod_vec/_nmod_vec_nored_scalar_addmul_halflimb.html (generated 2026-11-02).

@misc{flint-doc-nmod-vec-nmod-vec-nored-scalar-addmul-halflimb,
  author       = {{The FLINT team}},
  title        = {{\_nmod\_vec\_nored\_scalar\_addmul\_halflimb, \_nmod\_vec\_nored\_scalar\_addmul\_halflimb\_avx2 (nmod\_vec.h)}},
  howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
  year         = {2026},
  url          = {https://flintlib.org/doc/nmod_vec/_nmod_vec_nored_scalar_addmul_halflimb.html},
  note         = {Generated 2026-11-02}
}

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