mirror of
https://gitlab.com/libeigen/eigen.git
synced 2024-12-09 07:00:27 +08:00
116 lines
2.7 KiB
C++
116 lines
2.7 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
|
|
// for linear algebra.
|
|
//
|
|
// Copyright (C) 2009 Mark Borgerding mark a borgerding net
|
|
//
|
|
// 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/.
|
|
|
|
#include <iostream>
|
|
|
|
#include <bench/BenchUtil.h>
|
|
#include <complex>
|
|
#include <vector>
|
|
#include <Eigen/Core>
|
|
|
|
#include <unsupported/Eigen/FFT>
|
|
|
|
using namespace Eigen;
|
|
using namespace std;
|
|
|
|
|
|
template <typename T>
|
|
string nameof();
|
|
|
|
template <> string nameof<float>() {return "float";}
|
|
template <> string nameof<double>() {return "double";}
|
|
template <> string nameof<long double>() {return "long double";}
|
|
|
|
#ifndef TYPE
|
|
#define TYPE float
|
|
#endif
|
|
|
|
#ifndef NFFT
|
|
#define NFFT 1024
|
|
#endif
|
|
#ifndef NDATA
|
|
#define NDATA 1000000
|
|
#endif
|
|
|
|
using namespace Eigen;
|
|
|
|
template <typename T>
|
|
void bench(int nfft,bool fwd,bool unscaled=false, bool halfspec=false)
|
|
{
|
|
typedef typename NumTraits<T>::Real Scalar;
|
|
typedef typename std::complex<Scalar> Complex;
|
|
int nits = NDATA/nfft;
|
|
vector<T> inbuf(nfft);
|
|
vector<Complex > outbuf(nfft);
|
|
FFT< Scalar > fft;
|
|
|
|
if (unscaled) {
|
|
fft.SetFlag(fft.Unscaled);
|
|
cout << "unscaled ";
|
|
}
|
|
if (halfspec) {
|
|
fft.SetFlag(fft.HalfSpectrum);
|
|
cout << "halfspec ";
|
|
}
|
|
|
|
|
|
std::fill(inbuf.begin(),inbuf.end(),0);
|
|
fft.fwd( outbuf , inbuf);
|
|
|
|
BenchTimer timer;
|
|
timer.reset();
|
|
for (int k=0;k<8;++k) {
|
|
timer.start();
|
|
if (fwd)
|
|
for(int i = 0; i < nits; i++)
|
|
fft.fwd( outbuf , inbuf);
|
|
else
|
|
for(int i = 0; i < nits; i++)
|
|
fft.inv(inbuf,outbuf);
|
|
timer.stop();
|
|
}
|
|
|
|
cout << nameof<Scalar>() << " ";
|
|
double mflops = 5.*nfft*log2((double)nfft) / (1e6 * timer.value() / (double)nits );
|
|
if ( NumTraits<T>::IsComplex ) {
|
|
cout << "complex";
|
|
}else{
|
|
cout << "real ";
|
|
mflops /= 2;
|
|
}
|
|
|
|
|
|
if (fwd)
|
|
cout << " fwd";
|
|
else
|
|
cout << " inv";
|
|
|
|
cout << " NFFT=" << nfft << " " << (double(1e-6*nfft*nits)/timer.value()) << " MS/s " << mflops << "MFLOPS\n";
|
|
}
|
|
|
|
int main(int argc,char ** argv)
|
|
{
|
|
bench<complex<float> >(NFFT,true);
|
|
bench<complex<float> >(NFFT,false);
|
|
bench<float>(NFFT,true);
|
|
bench<float>(NFFT,false);
|
|
bench<float>(NFFT,false,true);
|
|
bench<float>(NFFT,false,true,true);
|
|
|
|
bench<complex<double> >(NFFT,true);
|
|
bench<complex<double> >(NFFT,false);
|
|
bench<double>(NFFT,true);
|
|
bench<double>(NFFT,false);
|
|
bench<complex<long double> >(NFFT,true);
|
|
bench<complex<long double> >(NFFT,false);
|
|
bench<long double>(NFFT,true);
|
|
bench<long double>(NFFT,false);
|
|
return 0;
|
|
}
|