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optymalizacja 5x

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Piotr Dergun
2016-11-02 16:45:26 +01:00
parent e4be0fdacc
commit 7f2ae606f8
1 changed files with 6 additions and 3 deletions
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9
DergunPiotr-WaskoDominik/zad2/macierz_mpi.cpp
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@@ -66,9 +66,9 @@ int main(int argc, char *argv[])
exit(1); exit(1);
} }
if (rozmiar <= 0 || rozmiar > 2000) if (rozmiar <= 0)
{ {
cerr << "The number of matrix dimension must be in range [1,2000]" << endl; cerr << "The number of matrix dimension must be positive" << endl;
exit(1); exit(1);
} }
@@ -150,9 +150,12 @@ int main(int argc, char *argv[])
for (i=0; i<porcja_new; ++i) for (i=0; i<porcja_new; ++i)
{ {
vect_c[i] = 0; vect_c[i] = 0;
long a_row = i%rozmiar;
long vect_col = (i/rozmiar)*rozmiar;
for (long k=0; k<rozmiar; ++k) for (long k=0; k<rozmiar; ++k)
{ {
vect_c[i] += A[i%rozmiar][k]*vect[(i/rozmiar)*rozmiar+k]; vect_c[i] += A[a_row][k]*vect[vect_col];
++vect_col;
} }
} }