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 local array. */
  13         struct gpu_local_array_info *local_array;
  14         /* This is the corresponding array. */
  15         struct gpu_array_info *array;
  16         /* Position of this group in the list of reference groups of array. */
  17         int nr;
  18
  19         /* The following fields are use during the construction of the groups.
  20          * access is the combined access relation relative to the shared
  21          * memory tiling.  In particular, the domain of the map corresponds
  22          * to the first shared_len dimensions of the computed schedule.
  23          * write is set if any access in the group is a write.
  24          * exact_write is set if all writes are definite writes.
  25          * slice is set if there is at least one access in the group
  26          * that refers to more than one element
  27          */
  28         isl_map *access;
  29         int write;
  30         int exact_write;
  31         int slice;
  32
  33         /* The shared memory tile, NULL if none. */
  34         struct gpu_array_tile *shared_tile;
  35
  36         /* The private memory tile, NULL if none. */
  37         struct gpu_array_tile *private_tile;
  38
  39         /* References in this group; point to elements of a linked list. */
  40         int n_ref;
  41         struct gpu_stmt_access **refs;
  42
  43         /* Last shared memory tile dimension that affects tile of this group. */
  44         int last_shared;
  45 };
  46
  47 int gpu_group_references(struct gpu_gen *gen);
  48
  49 __isl_give isl_printer *gpu_array_ref_group_print_name(
  50         struct gpu_array_ref_group *group, __isl_take isl_printer *p);
  51 void gpu_array_ref_group_compute_tiling(struct gpu_array_ref_group *group);
  52 __isl_give isl_union_map *gpu_array_ref_group_access_relation(
  53         struct gpu_array_ref_group *group, int read, int write);
  54 struct gpu_array_ref_group *gpu_array_ref_group_free(
  55         struct gpu_array_ref_group *group);
  56
  57 #endif