59 lines
920 B
C
59 lines
920 B
C
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/* { dg-do run } */
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/* { dg-additional-options "-msse2" { target sse2_runtime } } */
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/* { dg-additional-options "-mavx" { target avx_runtime } } */
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#define N 128
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#define M 16
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#define EPS 0.0000000000000001
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#define SAFELEN 16
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#include <stdlib.h>
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void init(double *a, double *b, int n)
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{
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int i, s = -1;
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for ( i = 0; i < n; i++ )
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{
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a[i] = i*i*s;
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b[i] = a[i];
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s = -s;
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}
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}
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void work( double *b, int n, int m )
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{
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int i;
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#pragma omp simd safelen(SAFELEN)
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for (i = m; i < n; i++)
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b[i] = b[i-m] - 1.0f;
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}
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void work_ref( double *b, int n, int m )
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{
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int i;
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for (i = m; i < n; i++)
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b[i] = b[i-m] - 1.0f;
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}
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void check (double *a, double *b)
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{
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int i;
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for (i = 0; i < N; i++)
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if (a[i] - b[i] > EPS || b[i] - a[i] > EPS)
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abort ();
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}
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int main ()
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{
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double b[N], b_ref[N];
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init(b, b_ref, N);
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work(b, N, M);
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work(b_ref, N, M);
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check(b, b_ref);
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return 0;
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}
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