Store h_max values as floats in the `struct cell`, as the h values themselves...

Store h_max values as floats in the `struct cell`, as the h values themselves are also just `float`s.

src/cell.h

@@ -94,8 +94,11 @@ struct pcell {
   /*! Hydro variables */
   struct {
 
+    /*! Number of #part in this cell. */
+    int count;
+
     /*! Maximal smoothing length. */
-    double h_max;
+    float h_max;
 
     /*! Minimal integer end-of-timestep in this cell for hydro tasks */
     integertime_t ti_end_min;
@@ -109,9 +112,6 @@ struct pcell {
     /*! Integer time of the last drift of the #part in this cell */
     integertime_t ti_old_part;
 
-    /*! Number of #part in this cell. */
-    int count;
-
   } hydro;
 
   /*! Gravity variables */
@@ -159,7 +159,7 @@ struct pcell {
     int count;
 
     /*! Maximal smoothing length. */
-    double h_max;
+    float h_max;
 
     /*! Minimal integer end-of-timestep in this cell for stars tasks */
     integertime_t ti_end_min;
@@ -179,7 +179,7 @@ struct pcell {
     int count;
 
     /*! Maximal smoothing length. */
-    double h_max;
+    float h_max;
 
     /*! Minimal integer end-of-timestep in this cell for black hole tasks */
     integertime_t ti_end_min;
@@ -386,9 +386,6 @@ struct cell {
     /*! Task for sorting the stars again after a SF event */
     struct task *stars_resort;
 
-    /*! Max smoothing length in this cell. */
-    double h_max;
-
     /*! Last (integer) time the cell's part were drifted forward in time. */
     integertime_t ti_old_part;
 
@@ -405,6 +402,9 @@ struct cell {
     /*! Spin lock for various uses (#part case). */
     swift_lock_type lock;
 
+    /*! Max smoothing length in this cell. */
+    float h_max;
+
     /*! Maximum part movement in this cell since last construction. */
     float dx_max_part;
 
@@ -569,9 +569,6 @@ struct cell {
     /*! Implicit tasks marking the exit of the stellar physics block of tasks */
     struct task *stars_out;
 
-    /*! Max smoothing length in this cell. */
-    double h_max;
-
     /*! Last (integer) time the cell's spart were drifted forward in time. */
     integertime_t ti_old_part;
 
@@ -587,6 +584,9 @@ struct cell {
     /*! Nr of #spart this cell can hold after addition of new #spart. */
     int count_total;
 
+    /*! Max smoothing length in this cell. */
+    float h_max;
+
     /*! Values of h_max before the drifts, used for sub-cell tasks. */
     float h_max_old;
 
@@ -678,9 +678,6 @@ struct cell {
     /*! Linked list of the tasks computing this cell's BH feedback. */
     struct link *feedback;
 
-    /*! Max smoothing length in this cell. */
-    double h_max;
-
     /*! Last (integer) time the cell's bpart were drifted forward in time. */
     integertime_t ti_old_part;
 
@@ -693,6 +690,9 @@ struct cell {
     /*! Nr of #bpart this cell can hold after addition of new #bpart. */
     int count_total;
 
+    /*! Max smoothing length in this cell. */
+    float h_max;
+
     /*! Values of h_max before the drifts, used for sub-cell tasks. */
     float h_max_old;
 

src/runner_ghost.c

@@ -472,7 +472,7 @@ void runner_do_stars_ghost(struct runner *r, struct cell *c, int timer) {
    * Therefore we need to update h_max between the super- and top-levels */
   if (c->stars.ghost) {
     for (struct cell *tmp = c->parent; tmp != NULL; tmp = tmp->parent) {
-      atomic_max_d(&tmp->stars.h_max, h_max);
+      atomic_max_f(&tmp->stars.h_max, h_max);
     }
   }
 
@@ -783,7 +783,7 @@ void runner_do_black_holes_density_ghost(struct runner *r, struct cell *c,
    * Therefore we need to update h_max between the super- and top-levels */
   if (c->black_holes.density_ghost) {
     for (struct cell *tmp = c->parent; tmp != NULL; tmp = tmp->parent) {
-      atomic_max_d(&tmp->black_holes.h_max, h_max);
+      atomic_max_f(&tmp->black_holes.h_max, h_max);
     }
   }
 
@@ -1379,7 +1379,7 @@ void runner_do_ghost(struct runner *r, struct cell *c, int timer) {
    * Therefore we need to update h_max between the super- and top-levels */
   if (c->hydro.ghost) {
     for (struct cell *tmp = c->parent; tmp != NULL; tmp = tmp->parent) {
-      atomic_max_d(&tmp->hydro.h_max, h_max);
+      atomic_max_f(&tmp->hydro.h_max, h_max);
     }
   }