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Evghenii
2013-11-19 09:11:20 +01:00
parent 4bc8c79bd3
commit 86567ba96f
3 changed files with 61 additions and 22 deletions
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38
examples_cuda/stencil/stencil.cu
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@@ -31,31 +31,31 @@ stencil_step( int x0, int x1,
const int x = xb + programIndex;
#endif
int index = (z * Nxy) + (y * Nx) + x;
#define A_cur(x, y, z) Ain[index + (x) + ((y) * Nx) + ((z) * Nxy)]
int index = (z * Nxy) + (y * Nx) + x;
#define A_cur(x, y, z) __ldg(&Ain[index + (x) + ((y) * Nx) + ((z) * Nxy)])
#define A_next(x, y, z) Aout[index + (x) + ((y) * Nx) + ((z) * Nxy)]
double div =
coef0 * A_cur(0, 0, 0) +
coef1 * (A_cur(+1, 0, 0) + A_cur(-1, 0, 0) +
A_cur(0, +1, 0) + A_cur(0, -1, 0) +
A_cur(0, 0, +1) + A_cur(0, 0, -1)) +
coef2 * (A_cur(+2, 0, 0) + A_cur(-2, 0, 0) +
A_cur(0, +2, 0) + A_cur(0, -2, 0) +
A_cur(0, 0, +2) + A_cur(0, 0, -2)) +
coef3 * (A_cur(+3, 0, 0) + A_cur(-3, 0, 0) +
A_cur(0, +3, 0) + A_cur(0, -3, 0) +
A_cur(0, 0, +3) + A_cur(0, 0, -3));
double div =
coef0 * A_cur(0, 0, 0) +
coef1 * (A_cur(+1, 0, 0) + A_cur(-1, 0, 0) +
A_cur(0, +1, 0) + A_cur(0, -1, 0) +
A_cur(0, 0, +1) + A_cur(0, 0, -1)) +
coef2 * (A_cur(+2, 0, 0) + A_cur(-2, 0, 0) +
A_cur(0, +2, 0) + A_cur(0, -2, 0) +
A_cur(0, 0, +2) + A_cur(0, 0, -2)) +
coef3 * (A_cur(+3, 0, 0) + A_cur(-3, 0, 0) +
A_cur(0, +3, 0) + A_cur(0, -3, 0) +
A_cur(0, 0, +3) + A_cur(0, 0, -3));
if (x < x1)
A_next(0, 0, 0) = 2.0 * A_cur(0, 0, 0) - A_next(0, 0, 0) +
vsq[index] * div;
}
if (x < x1)
A_next(0, 0, 0) = 2.0 * A_cur(0, 0, 0) - A_next(0, 0, 0) +
__ldg(&vsq[index]) * div;
}
}
#define SPANX 32
#define SPANY 8
#define SPANZ 8
#define SPANY 2
#define SPANZ 4
__global__ void
stencil_step_task( int x0, int x1,