_decfloat_dot2
Synopsis
#include <flint/decimal.h>int _decfloat_dot2(decfloat_t res, const decfloat_t x1, const decfloat_t y1, const decfloat_t x2, const decfloat_t y2, int subtract, slong prec, int rnd, decimal_rounding_info * info, decmag_ptr err, gr_ctx_t ctx)sourceSets res to x_1 y_1 \pm x_2 y_2 correctly rounded (with the convention that a zero factor annihilates its term even when the other factor is infinite), optionally recording the rounding error. This is the primitive behind complex multiplication and division for both floating-point numbers and balls.
Cite this page
The FLINT team, “_decfloat_dot2 (decimal.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/decimal/_decfloat_dot2.html (generated 2026-10-20).
@misc{flint-doc-decimal-decfloat-dot2,
author = {{The FLINT team}},
title = {{\_decfloat\_dot2 (decimal.h)}},
howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
year = {2026},
url = {https://flintlib.org/doc/decimal/_decfloat_dot2.html},
note = {Generated 2026-10-20}
}