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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/*
* Copyright © 2014-2015 Broadcom
*
* 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.
*/
#ifndef NIR_BUILDER_H
#define NIR_BUILDER_H
struct exec_list;
typedef struct nir_builder {
struct exec_list *cf_node_list;
nir_instr *before_instr;
nir_shader *shader;
nir_function_impl *impl;
} nir_builder;
static inline void
nir_builder_init(nir_builder *build, nir_function_impl *impl)
{
memset(build, 0, sizeof(*build));
build->impl = impl;
build->shader = impl->overload->function->shader;
}
static inline void
nir_builder_insert_after_cf_list(nir_builder *build,
struct exec_list *cf_node_list)
{
build->cf_node_list = cf_node_list;
}
static inline void
nir_builder_insert_before_instr(nir_builder *build, nir_instr *before_instr)
{
build->before_instr = before_instr;
}
static inline void
nir_builder_instr_insert(nir_builder *build, nir_instr *instr)
{
if (build->cf_node_list) {
nir_instr_insert_after_cf_list(build->cf_node_list, instr);
} else {
assert(build->before_instr);
nir_instr_insert_before(build->before_instr, instr);
}
}
static inline nir_ssa_def *
nir_build_imm(nir_builder *build, unsigned num_components, nir_const_value value)
{
nir_load_const_instr *load_const =
nir_load_const_instr_create(build->shader, num_components);
if (!load_const)
return NULL;
load_const->value = value;
nir_builder_instr_insert(build, &load_const->instr);
return &load_const->def;
}
static inline nir_ssa_def *
nir_imm_float(nir_builder *build, float x)
{
nir_const_value v = { { .f = {x, 0, 0, 0} } };
return nir_build_imm(build, 1, v);
}
static inline nir_ssa_def *
nir_imm_vec4(nir_builder *build, float x, float y, float z, float w)
{
nir_const_value v = { { .f = {x, y, z, w} } };
return nir_build_imm(build, 4, v);
}
static inline nir_ssa_def *
nir_imm_int(nir_builder *build, int x)
{
nir_const_value v = { { .i = {x, 0, 0, 0} } };
return nir_build_imm(build, 1, v);
}
static inline nir_ssa_def *
nir_build_alu(nir_builder *build, nir_op op, nir_ssa_def *src0,
nir_ssa_def *src1, nir_ssa_def *src2, nir_ssa_def *src3)
{
const nir_op_info *op_info = &nir_op_infos[op];
nir_alu_instr *instr = nir_alu_instr_create(build->shader, op);
if (!instr)
return NULL;
instr->src[0].src = nir_src_for_ssa(src0);
if (src1)
instr->src[1].src = nir_src_for_ssa(src1);
if (src2)
instr->src[2].src = nir_src_for_ssa(src2);
if (src3)
instr->src[3].src = nir_src_for_ssa(src3);
/* Guess the number of components the destination temporary should have
* based on our input sizes, if it's not fixed for the op.
*/
unsigned num_components = op_info->output_size;
if (num_components == 0) {
for (unsigned i = 0; i < op_info->num_inputs; i++) {
if (op_info->input_sizes[i] == 0)
num_components = MAX2(num_components,
instr->src[i].src.ssa->num_components);
}
}
assert(num_components != 0);
/* Make sure we don't swizzle from outside of our source vector (like if a
* scalar value was passed into a multiply with a vector).
*/
for (unsigned i = 0; i < op_info->num_inputs; i++) {
for (unsigned j = instr->src[i].src.ssa->num_components; j < 4; j++) {
instr->src[i].swizzle[j] = instr->src[i].src.ssa->num_components - 1;
}
}
nir_ssa_dest_init(&instr->instr, &instr->dest.dest, num_components, NULL);
instr->dest.write_mask = (1 << num_components) - 1;
nir_builder_instr_insert(build, &instr->instr);
return &instr->dest.dest.ssa;
}
#define ALU1(op) \
static inline nir_ssa_def * \
nir_##op(nir_builder *build, nir_ssa_def *src0) \
{ \
return nir_build_alu(build, nir_op_##op, src0, NULL, NULL, NULL); \
}
#define ALU2(op) \
static inline nir_ssa_def * \
nir_##op(nir_builder *build, nir_ssa_def *src0, nir_ssa_def *src1) \
{ \
return nir_build_alu(build, nir_op_##op, src0, src1, NULL, NULL); \
}
#define ALU3(op) \
static inline nir_ssa_def * \
nir_##op(nir_builder *build, nir_ssa_def *src0, \
nir_ssa_def *src1, nir_ssa_def *src2) \
{ \
return nir_build_alu(build, nir_op_##op, src0, src1, src2, NULL); \
}
#define ALU4(op) \
static inline nir_ssa_def * \
nir_##op(nir_builder *build, nir_ssa_def *src0, \
nir_ssa_def *src1, nir_ssa_def *src2, nir_ssa_def *src3) \
{ \
return nir_build_alu(build, nir_op_##op, src0, src1, src2, src3); \
}
#include "nir_builder_opcodes.h"
/**
* Similar to nir_fmov, but takes a nir_alu_src instead of a nir_ssa_def.
*/
static inline nir_ssa_def *
nir_fmov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
{
nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_fmov);
nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
mov->dest.write_mask = (1 << num_components) - 1;
mov->src[0] = src;
nir_builder_instr_insert(build, &mov->instr);
return &mov->dest.dest.ssa;
}
static inline nir_ssa_def *
nir_imov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
{
nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_imov);
nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
mov->dest.write_mask = (1 << num_components) - 1;
mov->src[0] = src;
nir_builder_instr_insert(build, &mov->instr);
return &mov->dest.dest.ssa;
}
/**
* Construct an fmov or imov that reswizzles the source's components.
*/
static inline nir_ssa_def *
nir_swizzle(nir_builder *build, nir_ssa_def *src, unsigned swiz[4],
unsigned num_components, bool use_fmov)
{
nir_alu_src alu_src;
memset(&alu_src, 0, sizeof(alu_src));
alu_src.src = nir_src_for_ssa(src);
for (int i = 0; i < 4; i++)
alu_src.swizzle[i] = swiz[i];
return use_fmov ? nir_fmov_alu(build, alu_src, num_components) :
nir_imov_alu(build, alu_src, num_components);
}
/**
* Turns a nir_src into a nir_ssa_def * so it can be passed to
* nir_build_alu()-based builder calls.
*/
static inline nir_ssa_def *
nir_ssa_for_src(nir_builder *build, nir_src src, int num_components)
{
if (src.is_ssa && src.ssa->num_components == num_components)
return src.ssa;
nir_alu_src alu;
memset(&alu, 0, sizeof(alu));
alu.src = src;
for (int j = 0; j < 4; j++)
alu.swizzle[j] = j;
return nir_imov_alu(build, alu, num_components);
}
#endif /* NIR_BUILDER_H */
|
