/*-
 * Copyright (c) 2005 Colin Percival
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted providing that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Redistributions of source code must ensure that the list of
 *    copyright notices is complete, and the lack of a copyright notice
 *    corresponding to a copyrightable contribution or modification may
 *    be taken as an affirmative statement that said contribution or
 *    modification has been placed in the public domain.
 * 4. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Colin Percival.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
/*
 * $Id: fftconv.h,v 1.1 2005/07/12 07:42:10 cperciva Exp $
 */

/**T
The function {\em tricl\_fftconv\_scale}($DAT$, $n$) multiplies the 
$2^n$ complex values ($2^{n + 1}$ doubles) stored in $DAT$ by $2^{-n}$.
*/
void tricl_fftconv_scale(double *, int);

/**T
The function {\em tricl\_fftconv\_mulpw}($DAT1$, $DAT2$, $n$) computes 
the product of $2^n$ pairs of complex values from $DAT1$ and $DAT2$ and
writes the resulting values into $DAT1$.
*/
void tricl_fftconv_mulpw(double * __restrict, double * __restrict, int);

/**T
The function {\em tricl\_fft\_sqrpw}($DAT$, $n$) squares $2^n$ complex
values from $DAT$ and writes the resulting values into $DAT$.
*/
void tricl_fftconv_sqrpw(double *, int);