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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 inst_reads_a_uniform(struct qinst
*inst
)
44 for (int i
= 0; i
< qir_get_op_nsrc(inst
->op
); i
++) {
45 if (inst
->src
[i
].file
== QFILE_UNIF
)
53 block_reads_any_uniform(struct qblock
*block
)
55 qir_for_each_inst(inst
, block
) {
56 if (inst_reads_a_uniform(inst
))
64 qir_emit_uniform_stream_resets(struct vc4_compile
*c
)
66 uint32_t uniform_count
= 0;
68 qir_for_each_block(block
, c
) {
69 if (block
!= qir_entry_block(c
) &&
70 (block_reads_any_uniform(block
) ||
71 block
== qir_exit_block(c
))) {
72 struct qreg t
= qir_get_temp(c
);
73 struct qreg uni_addr
=
74 qir_uniform(c
, QUNIFORM_UNIFORMS_ADDRESS
, 0);
76 /* Load the offset of the next uniform in the stream
77 * after the one we're generating here.
79 struct qinst
*load_imm
=
80 qir_inst(QOP_LOAD_IMM
,
82 qir_reg(QFILE_LOAD_IMM
,
83 (uniform_count
+ 1) * 4),
86 qir_inst(QOP_UNIFORMS_RESET
, c
->undef
,
89 /* Pushes to the top of the block, so in reverse
92 list_add(&add
->link
, &block
->instructions
);
93 list_add(&load_imm
->link
, &block
->instructions
);
96 qir_for_each_inst(inst
, block
) {
97 if (inst_reads_a_uniform(inst
))