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2a86f052a5
(only 30 muls for size 4) - rework the matrix inversion: now using cofactor technique for size<=3, so the ugly unrolling is only used for size 4 anymore, and even there I'm looking to get rid of it.
37 lines
736 B
C++
37 lines
736 B
C++
// g++ -O3 -DNDEBUG -DMATSIZE=<x> benchmark.cpp -o benchmark && time ./benchmark
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#include <Eigen/Core>
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#ifndef MATSIZE
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#define MATSIZE 3
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#endif
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using namespace std;
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USING_PART_OF_NAMESPACE_EIGEN
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#ifndef REPEAT
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#define REPEAT 40000000
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#endif
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#ifndef SCALAR
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#define SCALAR double
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#endif
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int main(int argc, char *argv[])
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{
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Matrix<SCALAR,MATSIZE,MATSIZE> I = Matrix<SCALAR,MATSIZE,MATSIZE>::ones();
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Matrix<SCALAR,MATSIZE,MATSIZE> m;
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for(int i = 0; i < MATSIZE; i++)
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for(int j = 0; j < MATSIZE; j++)
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{
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m(i,j) = (i+MATSIZE*j);
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}
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asm("#begin");
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for(int a = 0; a < REPEAT; a++)
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{
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m = I + 0.00005 * (m + m*m);
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}
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asm("#end");
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cout << m << endl;
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return 0;
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}
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