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111
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1 const int n = 100;
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2
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3 int
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4 private_reduction ()
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5 {
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6 int i, r;
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7
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8 #pragma acc parallel
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9 #pragma acc loop private (r) reduction (+:r)
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10 for (i = 0; i < 100; i++)
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11 r += 10;
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12
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13 return r;
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14 }
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15
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16 int
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17 parallel_reduction ()
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18 {
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19 int sum = 0;
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20 int dummy = 0;
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21
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22 #pragma acc data copy (dummy)
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23 {
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24 #pragma acc parallel num_gangs (10) copy (sum) reduction (+:sum)
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25 {
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26 int v = 5;
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27 sum += 10 + v;
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28 }
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29 }
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30
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31 return sum;
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32 }
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33
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34 int
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35 main ()
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36 {
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37 int i, s = 0;
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38
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39 #pragma acc parallel num_gangs (10) copy (s) reduction (+:s)
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40 for (i = 0; i < n; i++)
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41 s += i+1;
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42
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43 #pragma acc parallel num_gangs (10) reduction (+:s) copy (s)
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44 for (i = 0; i < n; i++)
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45 s += i+1;
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46
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47 return 0;
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48 }
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