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diff --git a/include/dux/algo.d/fma.hh b/include/dux/algo.d/fma.hh
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+++ b/include/dux/algo.d/fma.hh
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+/*
+ Copyright 2021 Gabriel Jensen
+
+ This file is part of dux.
+
+ dux is free software: you can redistribute it and/or modify it under the
+ terms of the GNU Affero General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or (at your
+ option) any later version.
+
+ dux is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public
+ License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with dux. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+template<::dux::arith T> constexpr auto ::dux::fma(T const _x,T const _y,T const _z) noexcept -> T {
+ return _x * _y + _z;
+}