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  * Note that if both private_tile and shared_tile are set, then shared_tile
  11  * is only used inside group_common_shared_memory_tile.
  12  */
  13 struct gpu_array_ref_group {
  14         /* The references in this group access this local array. */
  15         struct gpu_local_array_info *local_array;
  16         /* This is the corresponding array. */
  17         struct gpu_array_info *array;
  18         /* Position of this group in the list of reference groups of array. */
  19         int nr;
  20
  21         /* The following fields are use during the construction of the groups.
  22          * access is the combined access relation relative to the shared
  23          * memory tiling.  In particular, the domain of the map corresponds
  24          * to the first shared_len dimensions of the computed schedule.
  25          * write is set if any access in the group is a write.
  26          * exact_write is set if all writes are definite writes.
  27          * slice is set if there is at least one access in the group
  28          * that refers to more than one element
  29          */
  30         isl_map *access;
  31         int write;
  32         int exact_write;
  33         int slice;
  34
  35         /* The shared memory tile, NULL if none. */
  36         struct gpu_array_tile *shared_tile;
  37
  38         /* The private memory tile, NULL if none. */
  39         struct gpu_array_tile *private_tile;
  40
  41         /* References in this group; point to elements of a linked list. */
  42         int n_ref;
  43         struct gpu_stmt_access **refs;
  44
  45         /* Last shared memory tile dimension that affects tile of this group. */
  46         int last_shared;
  47 };
  48
  49 int gpu_group_references(struct gpu_gen *gen);
  50
  51 __isl_give isl_printer *gpu_array_ref_group_print_name(
  52         struct gpu_array_ref_group *group, __isl_take isl_printer *p);
  53 void gpu_array_ref_group_compute_tiling(struct gpu_array_ref_group *group);
  54 __isl_give isl_union_map *gpu_array_ref_group_access_relation(
  55         struct gpu_array_ref_group *group, int read, int write);
  56 int gpu_array_ref_group_requires_unroll(struct gpu_array_ref_group *group);
  57 struct gpu_array_tile *gpu_array_ref_group_tile(
  58         struct gpu_array_ref_group *group);
  59 struct gpu_array_ref_group *gpu_array_ref_group_free(
  60         struct gpu_array_ref_group *group);
  61
  62 #endif