Commit 9cad02d0 authored by James Willis's avatar James Willis
Browse files

Comments.

parent f194e08b
......@@ -432,11 +432,12 @@ static const vector cubic_2_dwdx_const_c2 = FILL_VEC(-3.f);
static const vector cond = FILL_VEC(0.5f);
#endif
/*TODO: Comment kernels for each region */
/**
* @brief Computes the kernel function and its derivative for two particles
* using vectors.
*
* Return 0 if $u > \\gamma = H/h$
* using vectors. Does not return zero if $u > \\gamma = H/h$, should only
* be called if particles are known to interact.
*
* @param u The ratio of the distance to the smoothing length $u = x/h$.
* @param w (return) The value of the kernel function $W(x,h)$.
......@@ -516,9 +517,8 @@ __attribute__((always_inline)) INLINE static void kernel_deval_1_vec(
/**
* @brief Computes the kernel function and its derivative for two particles
* using interleaved vectors.
*
* Return 0 if $u > \\gamma = H/h$
* using interleaved vectors. Does not return zero if $u > \\gamma = H/h$, should only
* be called if particles are known to interact.
*
* @param u The ratio of the distance to the smoothing length $u = x/h$.
* @param w (return) The value of the kernel function $W(x,h)$.
......@@ -648,9 +648,8 @@ __attribute__((always_inline)) INLINE static void kernel_deval_2_vec(
/**
* @brief Computes the kernel function for two particles
* using vectors.
*
* Return 0 if $u > \\gamma = H/h$
* using vectors. Does not return zero if $u > \\gamma = H/h$, should only
* be called if particles are known to interact.
*
* @param u The ratio of the distance to the smoothing length $u = x/h$.
* @param w (return) The value of the kernel function $W(x,h)$.
......@@ -710,9 +709,8 @@ __attribute__((always_inline)) INLINE static void kernel_eval_W_vec(vector *u,
/**
* @brief Computes the kernel function derivative for two particles
* using vectors.
*
* Return 0 if $u > \\gamma = H/h$
* using vectors. Does not return zero if $u > \\gamma = H/h$, should only
* be called if particles are known to interact.
*
* @param u The ratio of the distance to the smoothing length $u = x/h$.
* @param dw_dx (return) The norm of the gradient of $|\\nabla W(x,h)|$.
......@@ -825,6 +823,7 @@ __attribute__((always_inline)) INLINE static void kernel_eval_dWdx_force_vec(
#error
#endif
/* Mask out result for particles that lie outside of the kernel function. */
vector mask;
mask.v = vec_cmp_lt(x.v,vec_set1(1.f));
......@@ -837,7 +836,7 @@ __attribute__((always_inline)) INLINE static void kernel_eval_dWdx_force_vec(
/**
* @brief Computes the kernel function derivative for two particles
* using vectors.
* using interleaved vectors.
*
* Return 0 if $u > \\gamma = H/h$
*
......@@ -906,6 +905,7 @@ __attribute__((always_inline)) INLINE static void kernel_eval_dWdx_force_2_vec(
#error
#endif
/* Mask out result for particles that lie outside of the kernel function. */
vector mask, mask_2;
mask.v = vec_cmp_lt(x.v,vec_set1(1.f));
mask_2.v = vec_cmp_lt(x_2.v,vec_set1(1.f));
......@@ -919,6 +919,7 @@ __attribute__((always_inline)) INLINE static void kernel_eval_dWdx_force_2_vec(
dw_dx_2->v = vec_mul(dw_dx_2->v, vec_mul(kernel_constant_vec.v,
kernel_gamma_inv_dim_plus_one_vec.v));
}
#endif /* WITH_VECTORIZATION */
/* Some cross-check functions */
......
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