mirror of
https://github.com/OpenMP/Examples.git
synced 2025-04-04 05:41:33 +01:00
41 lines
783 B
C
41 lines
783 B
C
/*
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* @@name: scan.3
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* @@type: C
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* @@operation: run
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* @@expect: success
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* @@version: omp_6.0
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*/
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#include <stdio.h>
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#define N 100
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int main(void)
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{
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int c[N], tmp;
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int x = 0;
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// initialization
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for (int k = 0; k < N; k++)
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c[k] = k + 1;
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// c[k] is used for both input and output of scan results
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#pragma omp parallel for simd reduction(inscan,+: x) private(tmp)
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for (int k = 0; k < N; k++) {
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// initialization phase
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tmp = c[k];
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#pragma omp scan init_complete
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// scan (output) phase - cannot use tmp here
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c[k] = x;
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#pragma omp scan exclusive(x)
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// input phase - can use tmp here
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x += tmp;
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}
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printf("x = %d, c[0:3] = %d %d %d\n", x, c[0], c[1], c[2]);
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// 5050, 0 1 3
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return 0;
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}
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