1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/*
* Copyright © 2017 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "nir.h"
#include "nir_builder.h"
/**
* \file nir_opt_intrinsics.c
*/
static bool
opt_intrinsics_impl(nir_function_impl *impl)
{
nir_builder b;
nir_builder_init(&b, impl);
bool progress = false;
nir_foreach_block(block, impl) {
nir_foreach_instr_safe(instr, block) {
if (instr->type != nir_instr_type_intrinsic)
continue;
nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
nir_ssa_def *replacement = NULL;
b.cursor = nir_before_instr(instr);
switch (intrin->intrinsic) {
case nir_intrinsic_vote_any:
case nir_intrinsic_vote_all: {
nir_const_value *val = nir_src_as_const_value(intrin->src[0]);
if (!val && !b.shader->options->lower_vote_trivial)
continue;
replacement = nir_ssa_for_src(&b, intrin->src[0], 1);
break;
}
case nir_intrinsic_vote_eq: {
nir_const_value *val = nir_src_as_const_value(intrin->src[0]);
if (!val && !b.shader->options->lower_vote_trivial)
continue;
replacement = nir_imm_int(&b, NIR_TRUE);
break;
}
case nir_intrinsic_ballot: {
assert(b.shader->options->max_subgroup_size != 0);
if (b.shader->options->max_subgroup_size > 32 ||
intrin->dest.ssa.bit_size <= 32)
continue;
nir_intrinsic_instr *ballot =
nir_intrinsic_instr_create(b.shader, nir_intrinsic_ballot);
nir_ssa_dest_init(&ballot->instr, &ballot->dest, 1, 32, NULL);
nir_src_copy(&ballot->src[0], &intrin->src[0], ballot);
nir_builder_instr_insert(&b, &ballot->instr);
replacement = nir_pack_64_2x32_split(&b,
&ballot->dest.ssa,
nir_imm_int(&b, 0));
break;
}
case nir_intrinsic_load_subgroup_eq_mask:
case nir_intrinsic_load_subgroup_ge_mask:
case nir_intrinsic_load_subgroup_gt_mask:
case nir_intrinsic_load_subgroup_le_mask:
case nir_intrinsic_load_subgroup_lt_mask: {
if (!b.shader->options->lower_subgroup_masks)
break;
nir_ssa_def *count = nir_load_subgroup_invocation(&b);
switch (intrin->intrinsic) {
case nir_intrinsic_load_subgroup_eq_mask:
replacement = nir_ishl(&b, nir_imm_int64(&b, 1ull), count);
break;
case nir_intrinsic_load_subgroup_ge_mask:
replacement = nir_ishl(&b, nir_imm_int64(&b, ~0ull), count);
break;
case nir_intrinsic_load_subgroup_gt_mask:
replacement = nir_ishl(&b, nir_imm_int64(&b, ~1ull), count);
break;
case nir_intrinsic_load_subgroup_le_mask:
replacement = nir_inot(&b, nir_ishl(&b, nir_imm_int64(&b, ~1ull), count));
break;
case nir_intrinsic_load_subgroup_lt_mask:
replacement = nir_inot(&b, nir_ishl(&b, nir_imm_int64(&b, ~0ull), count));
break;
default:
unreachable("you seriously can't tell this is unreachable?");
}
break;
}
default:
break;
}
if (!replacement)
continue;
nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
nir_src_for_ssa(replacement));
nir_instr_remove(instr);
progress = true;
}
}
return progress;
}
bool
nir_opt_intrinsics(nir_shader *shader)
{
bool progress = false;
nir_foreach_function(function, shader) {
if (!function->impl)
continue;
if (opt_intrinsics_impl(function->impl)) {
progress = true;
nir_metadata_preserve(function->impl, nir_metadata_block_index |
nir_metadata_dominance);
}
}
return progress;
}
|
