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
33agx_index
34agx_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   ctx->push_base = ALIGN_POT(ctx->push_base, agx_size_align_16(size));
52
53   unsigned base = ctx->push_base;
54   ctx->push_base += length;
55
56   ctx->out->push[ctx->out->push_ranges++] = (struct agx_push) {
57      .type = type,
58      .base = base,
59      .length = length,
60      .indirect = false
61   };
62
63   return agx_uniform(base + index, size);
64}
65