src/intel/compiler/brw_fs_lower_pack.cpp

   1 /*
   2  * Copyright © 2015 Connor Abbott
   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
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "brw_fs.h"
  25 #include "brw_cfg.h"
  26 #include "brw_fs_builder.h"
  27
  28 using namespace brw;
  29
  30 bool
  31 fs_visitor::lower_pack()
  32 {
  33    bool progress = false;
  34
  35    foreach_block_and_inst_safe(block, fs_inst, inst, cfg) {
  36       if (inst->opcode != FS_OPCODE_PACK)
  37          continue;
  38
  39       assert(inst->dst.file == VGRF);
  40       assert(inst->saturate == false);
  41       fs_reg dst = inst->dst;
  42
  43       const fs_builder ibld(this, block, inst);
  44       for (unsigned i = 0; i < inst->sources; i++)
  45          ibld.MOV(subscript(dst, inst->src[i].type, i), inst->src[i]);
  46
  47       inst->remove(block);
  48       progress = true;
  49    }
  50
  51    if (progress)
  52       invalidate_analysis(DEPENDENCY_INSTRUCTIONS);
  53
  54    return progress;
  55 }