1 /*
2 * Copyright © 2022 Imagination Technologies Ltd.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * 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 THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24 #include "rogue.h"
25 #include "util/macros.h"
26
27 #include <stdbool.h>
28
29 /**
30 * \file rogue_constreg.c
31 *
32 * \brief Contains the rogue_constreg pass.
33 */
34
35 /* Converts immediate values to constant register values. */
36 PUBLIC
rogue_constreg(rogue_shader * shader)37 bool rogue_constreg(rogue_shader *shader)
38 {
39 if (shader->is_grouped)
40 return false;
41
42 bool progress = false;
43
44 rogue_foreach_imm_use_safe (imm_use, shader) {
45 unsigned index = rogue_constreg_lookup(*imm_use->imm);
46 /* Skip values that aren't in the special constant registers; they'll be
47 * replaced with immediate movs. */
48 if (index == ROGUE_NO_CONST_REG)
49 continue;
50
51 rogue_reg *reg = rogue_const_reg(shader, index);
52
53 struct list_head imm_use_link = imm_use->link;
54 if (rogue_src_imm_replace(imm_use, reg)) {
55 list_del(&imm_use_link);
56 progress |= true;
57 }
58 }
59
60 return progress;
61 }
62