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1 /*
2  * Copyright 2011 Tom Stellard <tstellar@gmail.com>
3  *
4  * All Rights Reserved.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining
7  * a copy of this software and associated documentation files (the
8  * "Software"), to deal in the Software without restriction, including
9  * without limitation the rights to use, copy, modify, merge, publish,
10  * distribute, sublicense, and/or sell copies of the Software, and to
11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
13  *
14  * The above copyright notice and this permission notice (including the
15  * next paragraph) shall be included in all copies or substantial
16  * portions of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25  *
26  */
27 
28 #ifndef RADEON_VARIABLE_H
29 #define RADEON_VARIABLE_H
30 
31 #include "radeon_compiler.h"
32 
33 struct radeon_compiler;
34 struct rc_list;
35 struct rc_reader_data;
36 struct rc_readers;
37 
38 struct live_intervals {
39 	int Start;
40 	int End;
41 	int Used;
42 };
43 
44 struct rc_variable {
45 	struct radeon_compiler * C;
46 	struct rc_dst_register Dst;
47 
48 	struct rc_instruction * Inst;
49 	unsigned int ReaderCount;
50 	struct rc_reader * Readers;
51 	struct live_intervals Live[4];
52 
53 	/* A friend is a variable that shares a reader with another variable.
54 	 */
55 	struct rc_variable * Friend;
56 };
57 
58 void rc_variable_change_dst(
59 	struct rc_variable * var,
60 	unsigned int new_index,
61 	unsigned int new_writemask);
62 
63 void rc_variable_compute_live_intervals(struct rc_variable * var);
64 
65 void rc_variable_add_friend(
66 	struct rc_variable * var,
67 	struct rc_variable * friend);
68 
69 struct rc_variable * rc_variable(
70 	struct radeon_compiler * c,
71 	unsigned int DstFile,
72 	unsigned int DstIndex,
73 	unsigned int DstWriteMask,
74 	struct rc_reader_data * reader_data);
75 
76 struct rc_list * rc_get_variables(struct radeon_compiler * c);
77 
78 unsigned int rc_variable_writemask_sum(struct rc_variable * var);
79 
80 struct rc_list * rc_variable_readers_union(struct rc_variable * var);
81 
82 struct rc_list * rc_variable_list_get_writers(
83 	struct rc_list * var_list,
84 	unsigned int src_type,
85 	void * src);
86 
87 struct rc_list * rc_variable_list_get_writers_one_reader(
88 	struct rc_list * var_list,
89 	unsigned int src_type,
90 	void * src);
91 
92 void rc_variable_print(struct rc_variable * var);
93 
94 #endif /* RADEON_VARIABLE_H */
95