2 * Copyright © 2014 Broadcom
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:
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
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
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 * @file vc4_qir_emit_uniform_stream_resets.c
27 * Adds updates to the uniform stream address at the start of each basic block
30 * This will be done just before the translation to QPU instructions, once we
31 * have performed optimization know how many uniforms are used in each block.
35 #include "util/hash_table.h"
36 #include "util/u_math.h"
39 block_reads_any_uniform(struct qblock
*block
)
41 qir_for_each_inst(inst
, block
) {
42 if (qir_has_uniform_read(inst
))
50 qir_emit_uniform_stream_resets(struct vc4_compile
*c
)
52 uint32_t uniform_count
= 0;
54 qir_for_each_block(block
, c
) {
55 if (block
!= qir_entry_block(c
) &&
56 (block_reads_any_uniform(block
) ||
57 block
== qir_exit_block(c
))) {
58 struct qreg t
= qir_get_temp(c
);
59 struct qreg uni_addr
=
60 qir_uniform(c
, QUNIFORM_UNIFORMS_ADDRESS
, 0);
62 /* Load the offset of the next uniform in the stream
63 * after the one we're generating here.
65 struct qinst
*load_imm
=
66 qir_inst(QOP_LOAD_IMM
,
68 qir_reg(QFILE_LOAD_IMM
,
69 (uniform_count
+ 1) * 4),
72 qir_inst(QOP_UNIFORMS_RESET
, c
->undef
,
75 /* Pushes to the top of the block, so in reverse
78 list_add(&add
->link
, &block
->instructions
);
79 list_add(&load_imm
->link
, &block
->instructions
);
82 qir_for_each_inst(inst
, block
) {
83 if (qir_has_uniform_read(inst
))