src/panfrost/bifrost/bi_pack.c

   1 /*
   2  * Copyright (C) 2020 Collabora, Ltd.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23
  24 #include "compiler.h"
  25
  26 /* This file contains the final passes of the compiler. Running after
  27  * scheduling and RA, the IR is now finalized, so we need to emit it to actual
  28  * bits on the wire (as well as fixup branches) */
  29
  30 static uint64_t
  31 bi_pack_header(bi_clause *clause, bi_clause *next)
  32 {
  33         struct bifrost_header header = {
  34                 /* stub */
  35                 .no_end_of_shader = (next != NULL),
  36         };
  37
  38         uint64_t u = 0;
  39         memcpy(&u, &header, sizeof(header));
  40         return u;
  41 }
  42
  43 static void
  44 bi_pack_clause(bi_context *ctx, bi_clause *clause, bi_clause *next,
  45                 struct util_dynarray *emission)
  46 {
  47
  48         struct bifrost_fmt1 quad_1 = {
  49                 .tag = BIFROST_FMT1_FINAL,
  50                 .header = bi_pack_header(clause, next)
  51         };
  52
  53         util_dynarray_append(emission, struct bifrost_fmt1, quad_1);
  54 }
  55
  56 static bi_clause *
  57 bi_next_clause(bi_context *ctx, pan_block *block, bi_clause *clause)
  58 {
  59         /* Try the next clause in this block */
  60         if (clause->link.next != &((bi_block *) block)->clauses)
  61                 return list_first_entry(&(clause->link), bi_clause, link);
  62
  63         /* Try the next block, or the one after that if it's empty, etc .*/
  64         pan_block *next_block = pan_next_block(block);
  65
  66         bi_foreach_block_from(ctx, next_block, block) {
  67                 bi_block *blk = (bi_block *) block;
  68
  69                 if (!list_is_empty(&blk->clauses))
  70                         return list_first_entry(&(blk->clauses), bi_clause, link);
  71         }
  72
  73         return NULL;
  74 }
  75
  76 void
  77 bi_pack(bi_context *ctx, struct util_dynarray *emission)
  78 {
  79         util_dynarray_init(emission, NULL);
  80
  81         bi_foreach_block(ctx, _block) {
  82                 bi_block *block = (bi_block *) _block;
  83
  84                 bi_foreach_clause_in_block(block, clause) {
  85                         bi_clause *next = bi_next_clause(ctx, _block, clause);
  86                         bi_pack_clause(ctx, clause, next, emission);
  87                 }
  88         }
  89 }