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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
bmul : {n,m} (fin n, n >= 1, m == n*2 - 1) => [n] -> [n] -> ([n], [n])
bmul a b = (take`{n} prod, drop`{n} prod)
where prod = pad (pmult a b : [m])
pad x = zero # x
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