src/gallium/drivers/r600/sfn/sfn_conditionaljumptracker.h

   1 /* -*- mesa-c++  -*-
   2  *
   3  * Copyright (c) 2018-2019 Collabora LTD
   4  *
   5  * Author: Gert Wollny <gert.wollny@collabora.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * on the rights to use, copy, modify, merge, publish, distribute, sub
  11  * license, and/or sell copies of the Software, and to permit persons to whom
  12  * the Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #ifndef SFN_CONDITIONALJUMPTRACKER_H
  28 #define SFN_CONDITIONALJUMPTRACKER_H
  29
  30 #include "gallium/drivers/r600/r600_asm.h"
  31
  32 namespace r600 {
  33
  34 enum JumpType {
  35    jt_loop,
  36    jt_if
  37 };
  38
  39 /**
  40   Class to link the jump locations
  41
  42 */
  43
  44
  45 class ConditionalJumpTracker
  46 {
  47 public:
  48    ConditionalJumpTracker();
  49    ~ConditionalJumpTracker();
  50
  51    /* Mark the start of a loop or a if/else */
  52
  53    void push(r600_bytecode_cf *start, JumpType type);
  54
  55    /* Mark the end of a loop or a if/else and fixup the jump sites */
  56    bool pop(r600_bytecode_cf *final, JumpType type);
  57
  58    /* Add middle sites to the call frame i.e. continue,
  59     * break inside loops, and else in if-then-else constructs.
  60     */
  61    bool add_mid(r600_bytecode_cf *source, JumpType type);
  62
  63 private:
  64    struct ConditionalJumpTrackerImpl * impl;
  65 };
  66
  67 }
  68
  69 #endif // SFN_CONDITIONALJUMPTRACKER_H