From 0cba43c17a348834b8ce74cf7e6fea12d55cc02e Mon Sep 17 00:00:00 2001 From: James Willis <james.s.willis@durham.ac.uk> Date: Wed, 13 Dec 2017 13:45:46 +0000 Subject: [PATCH] Created a function to read cj cell in subpair density. --- src/cache.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/src/cache.h b/src/cache.h index 3eb1e194dd..ef90f6c8bd 100644 --- a/src/cache.h +++ b/src/cache.h @@ -216,6 +216,43 @@ __attribute__((always_inline)) INLINE void cache_read_particles( #endif } +__attribute__((always_inline)) INLINE void cache_read_particles_subpair( + const struct cell *restrict const ci, + struct cache *restrict const ci_cache, const struct entry *restrict sort_i) { + +#if defined(GADGET2_SPH) + + /* Let the compiler know that the data is aligned and create pointers to the + * arrays inside the cache. */ + swift_declare_aligned_ptr(float, x, ci_cache->x, SWIFT_CACHE_ALIGNMENT); + swift_declare_aligned_ptr(float, y, ci_cache->y, SWIFT_CACHE_ALIGNMENT); + swift_declare_aligned_ptr(float, z, ci_cache->z, SWIFT_CACHE_ALIGNMENT); + swift_declare_aligned_ptr(float, h, ci_cache->h, SWIFT_CACHE_ALIGNMENT); + swift_declare_aligned_ptr(float, m, ci_cache->m, SWIFT_CACHE_ALIGNMENT); + swift_declare_aligned_ptr(float, vx, ci_cache->vx, SWIFT_CACHE_ALIGNMENT); + swift_declare_aligned_ptr(float, vy, ci_cache->vy, SWIFT_CACHE_ALIGNMENT); + swift_declare_aligned_ptr(float, vz, ci_cache->vz, SWIFT_CACHE_ALIGNMENT); + + const struct part *restrict parts = ci->parts; + const double loc[3] = {ci->loc[0], ci->loc[1], ci->loc[2]}; + + /* Shift the particles positions to a local frame so single precision can be + * used instead of double precision. */ + for (int i = 0; i < ci->count; i++) { + const int idx = sort_i[i].i; + x[i] = (float)(parts[idx].x[0] - loc[0]); + y[i] = (float)(parts[idx].x[1] - loc[1]); + z[i] = (float)(parts[idx].x[2] - loc[2]); + h[i] = parts[idx].h; + m[i] = parts[idx].mass; + vx[i] = parts[idx].v[0]; + vy[i] = parts[idx].v[1]; + vz[i] = parts[idx].v[2]; + } + +#endif +} + /** * @brief Populate cache for force interactions by reading in the particles in * unsorted order. -- GitLab