vec4d_fmadd_fused, vec4d_fmsub_fused, vec4d_fnmadd_fused
Synopsis
#include <flint/machine_vectors.h>Returns ab + c, ab - c and -ab + c rounded once on every backend, like fma(a, b, c), fma(a, b, -c) and fma(-a, b, c), including the sign of an exact zero. On AVX2 without FMA instructions they call fma lane by lane. All backends.
Guides#
Cite this page
The FLINT team, “vec4d_fmadd_fused, vec4d_fmsub_fused, vec4d_fnmadd_fused (machine_vectors.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/machine_vectors/vec4d_fmadd_fused.html (generated 2026-10-20).
@misc{flint-doc-machine-vectors-vec4d-fmadd-fused,
author = {{The FLINT team}},
title = {{vec4d\_fmadd\_fused, vec4d\_fmsub\_fused, vec4d\_fnmadd\_fused (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/vec4d_fmadd_fused.html},
note = {Generated 2026-10-20}
}