1 /*
2 * Copyright (C) 2021 Alyssa Rosenzweig <alyssa@rosenzweig.io>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is 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
18 * THE 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 "agx_compiler.h"
25
26 /* Manages the uniform file. We can push certain fixed items (during initial
27 * code generation), where we're gauranteed to have sufficient space. After
28 * that, UBO ranges can be selectively pushed while there's space. */
29
30 /* Directly index an array sysval. Index must be in bounds. Index specified in
31 * 16-bit units regardless of the underlying sysval's unit. */
32
33 agx_index
agx_indexed_sysval(agx_context * ctx,enum agx_push_type type,enum agx_size size,unsigned index,unsigned length)34 agx_indexed_sysval(agx_context *ctx, enum agx_push_type type,
35 enum agx_size size, unsigned index, unsigned length)
36 {
37 /* Check if we already pushed */
38 for (unsigned i = 0; i < ctx->out->push_ranges; ++i) {
39 struct agx_push push = ctx->out->push[i];
40
41 if (push.type == type && !push.indirect) {
42 assert(length == push.length);
43 assert(index < push.length);
44 return agx_uniform(push.base + index, size);
45 }
46 }
47
48 /* Otherwise, push */
49 assert(ctx->out->push_ranges < AGX_MAX_PUSH_RANGES);
50
51 unsigned base = ctx->push_base;
52 ctx->push_base += length;
53
54 ctx->out->push[ctx->out->push_ranges++] = (struct agx_push) {
55 .type = type,
56 .base = base,
57 .length = length,
58 .indirect = false
59 };
60
61 return agx_uniform(base + index, size);
62 }
63