gpu_group.h

   1 #ifndef GPU_GROUP_H
   2 #define GPU_GROUP_H
   3
   4 #include "gpu.h"
   5
   6 /* A group of array references in a kernel that should be handled together.
   7  * If private_tile is not NULL, then it is mapped to registers.
   8  * Otherwise, if shared_tile is not NULL, it is mapped to shared memory.
   9  * Otherwise, it is accessed from global memory.
  10  */
  11 struct gpu_array_ref_group {
  12         /* The references in this group access this array. */
  13         struct gpu_array_info *array;
  14         /* Position of this group in the list of reference groups of array. */
  15         int nr;
  16
  17         /* The following fields are use during the construction of the groups.
  18          * access is the combined access relation relative to the shared
  19          * memory tiling.  In particular, the domain of the map corresponds
  20          * to the first shared_len dimensions of the computed schedule.
  21          * write is set if any access in the group is a write.
  22          * exact_write is set if all writes are definite writes.
  23          * slice is set if there is at least one access in the group
  24          * that refers to more than one element
  25          */
  26         isl_map *access;
  27         int write;
  28         int exact_write;
  29         int slice;
  30
  31         /* The shared memory tile, NULL if none. */
  32         struct gpu_array_tile *shared_tile;
  33
  34         /* The private memory tile, NULL if none. */
  35         struct gpu_array_tile *private_tile;
  36
  37         /* References in this group; point to elements of a linked list. */
  38         int n_ref;
  39         struct gpu_stmt_access **refs;
  40
  41         /* Last shared memory tile dimension that affects tile of this group. */
  42         int last_shared;
  43 };
  44
  45 int gpu_group_references(struct gpu_gen *gen);
  46
  47 __isl_give isl_printer *gpu_array_ref_group_print_name(
  48         struct gpu_array_ref_group *group, __isl_take isl_printer *p);
  49 void gpu_array_ref_group_compute_tiling(struct gpu_array_ref_group *group);
  50 __isl_give isl_union_map *gpu_array_ref_group_access_relation(
  51         struct gpu_array_ref_group *group, int read, int write);
  52 struct gpu_array_ref_group *gpu_array_ref_group_free(
  53         struct gpu_array_ref_group *group);
  54
  55 #endif