2 * Copyright 2011 Tom Stellard <tstellar@gmail.com>
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:
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.
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.
28 #include "radeon_compiler.h"
29 #include "radeon_compiler_util.h"
30 #include "radeon_opcodes.h"
31 #include "radeon_program_pair.h"
33 static void mark_used_presub(struct rc_pair_sub_instruction
* sub
)
35 if (sub
->Src
[RC_PAIR_PRESUB_SRC
].Used
) {
36 unsigned int presub_reg_count
= rc_presubtract_src_reg_count(
37 sub
->Src
[RC_PAIR_PRESUB_SRC
].Index
);
39 for (i
= 0; i
< presub_reg_count
; i
++) {
45 static void mark_used(
46 struct rc_instruction
* inst
,
47 struct rc_pair_sub_instruction
* sub
)
50 const struct rc_opcode_info
* info
= rc_get_opcode_info(sub
->Opcode
);
51 for (i
= 0; i
< info
->NumSrcRegs
; i
++) {
52 unsigned int src_type
= rc_source_type_swz(sub
->Arg
[i
].Swizzle
);
53 if (src_type
& RC_SOURCE_RGB
) {
54 inst
->U
.P
.RGB
.Src
[sub
->Arg
[i
].Source
].Used
= 1;
57 if (src_type
& RC_SOURCE_ALPHA
) {
58 inst
->U
.P
.Alpha
.Src
[sub
->Arg
[i
].Source
].Used
= 1;
64 * This pass finds sources that are not used by their instruction and marks
67 void rc_pair_remove_dead_sources(struct radeon_compiler
* c
, void *user
)
69 struct rc_instruction
* inst
;
70 for (inst
= c
->Program
.Instructions
.Next
;
71 inst
!= &c
->Program
.Instructions
;
74 if (inst
->Type
== RC_INSTRUCTION_NORMAL
)
77 /* Mark all sources as unused */
78 for (i
= 0; i
< 4; i
++) {
79 inst
->U
.P
.RGB
.Src
[i
].Used
= 0;
80 inst
->U
.P
.Alpha
.Src
[i
].Used
= 0;
82 mark_used(inst
, &inst
->U
.P
.RGB
);
83 mark_used(inst
, &inst
->U
.P
.Alpha
);
85 mark_used_presub(&inst
->U
.P
.RGB
);
86 mark_used_presub(&inst
->U
.P
.Alpha
);