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
70