vec1d_fmsub, vec4d_fmsub, vec8d_fmsub, vec1d_fnmsub, vec4d_fnmsub, vec8d_fnmsub
Synopsis
#include <flint/machine_vectors.h>Returns ab - c and -ab - c, rounded once except for vec4d_fmsub on the generic backends. NEON computes ab - c as -(c - ab), which differs from vec4d_fmsub_fused in the sign of an exact zero. vec4d_fmsub is available on all backends, the others on AVX2 and NEON.
Guides#
Cite this page
The FLINT team, “vec1d_fmsub, vec4d_fmsub, vec8d_fmsub, vec1d_fnmsub, vec4d_fnmsub, vec8d_fnmsub (machine_vectors.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/machine_vectors/vec1d_fmsub.html (generated 2026-10-20).
@misc{flint-doc-machine-vectors-vec1d-fmsub,
author = {{The FLINT team}},
title = {{vec1d\_fmsub, vec4d\_fmsub, vec8d\_fmsub, vec1d\_fnmsub, vec4d\_fnmsub, vec8d\_fnmsub (machine\_vectors.h)}},
howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
year = {2026},
url = {https://flintlib.org/doc/machine_vectors/vec1d_fmsub.html},
note = {Generated 2026-10-20}
}