34 lines
670 B
C
34 lines
670 B
C
#include "matrix.h"
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#include <math.h>
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void init_vec_b(const double * restrict a, double * restrict b, int n)
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{
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#pragma omp parallel for
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for (int i = 0; i < n; ++i)
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{
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double sum = 0;
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// #pragma omp simd reduction(+:sum)
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// for (int k = 1; k < n; k+=2)
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// sum += a[i * n + k];
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for (int k = 0; k < (n-1)/2; ++k)
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sum += a[i*n + 2*k+1];
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b[i] = sum;
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}
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}
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void matvec_mul(int n, const double * restrict A, const double * restrict x, double * restrict x_k)
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{
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#pragma omp parallel for
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for (int i = 0; i < n; i++)
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{
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double sum = 0;
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#pragma omp simd reduction(+:sum)
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for (int j = 0; j < n; j++)
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sum += A[i * n + j] * x[j];
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x_k[i] = sum;
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}
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}
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