2 * Copyright © 2014 Intel Corporation
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
24 * Connor Abbott (cwabbott0@gmail.com)
25 * Jason Ekstrand (jason@jlekstrand.net)
30 * This lowering pass converts references to input/output variables with
31 * loads/stores to actual input/output intrinsics.
35 #include "nir_builder.h"
36 #include "nir_deref.h"
38 struct lower_io_state
{
41 int (*type_size
)(const struct glsl_type
*type
);
42 nir_variable_mode modes
;
43 nir_lower_io_options options
;
46 static nir_intrinsic_op
47 ssbo_atomic_for_deref(nir_intrinsic_op deref_op
)
50 #define OP(O) case nir_intrinsic_deref_##O: return nir_intrinsic_ssbo_##O;
67 unreachable("Invalid SSBO atomic");
71 static nir_intrinsic_op
72 global_atomic_for_deref(nir_intrinsic_op deref_op
)
75 #define OP(O) case nir_intrinsic_deref_##O: return nir_intrinsic_global_##O;
92 unreachable("Invalid SSBO atomic");
97 nir_assign_var_locations(struct exec_list
*var_list
, unsigned *size
,
98 int (*type_size
)(const struct glsl_type
*))
100 unsigned location
= 0;
102 nir_foreach_variable(var
, var_list
) {
104 * UBOs have their own address spaces, so don't count them towards the
105 * number of global uniforms
107 if (var
->data
.mode
== nir_var_mem_ubo
|| var
->data
.mode
== nir_var_mem_ssbo
)
110 var
->data
.driver_location
= location
;
111 location
+= type_size(var
->type
);
118 * Return true if the given variable is a per-vertex input/output array.
119 * (such as geometry shader inputs).
122 nir_is_per_vertex_io(const nir_variable
*var
, gl_shader_stage stage
)
124 if (var
->data
.patch
|| !glsl_type_is_array(var
->type
))
127 if (var
->data
.mode
== nir_var_shader_in
)
128 return stage
== MESA_SHADER_GEOMETRY
||
129 stage
== MESA_SHADER_TESS_CTRL
||
130 stage
== MESA_SHADER_TESS_EVAL
;
132 if (var
->data
.mode
== nir_var_shader_out
)
133 return stage
== MESA_SHADER_TESS_CTRL
;
139 get_io_offset(nir_builder
*b
, nir_deref_instr
*deref
,
140 nir_ssa_def
**vertex_index
,
141 int (*type_size
)(const struct glsl_type
*),
145 nir_deref_path_init(&path
, deref
, NULL
);
147 assert(path
.path
[0]->deref_type
== nir_deref_type_var
);
148 nir_deref_instr
**p
= &path
.path
[1];
150 /* For per-vertex input arrays (i.e. geometry shader inputs), keep the
151 * outermost array index separate. Process the rest normally.
153 if (vertex_index
!= NULL
) {
154 assert((*p
)->deref_type
== nir_deref_type_array
);
155 *vertex_index
= nir_ssa_for_src(b
, (*p
)->arr
.index
, 1);
159 if (path
.path
[0]->var
->data
.compact
) {
160 assert((*p
)->deref_type
== nir_deref_type_array
);
161 assert(glsl_type_is_scalar((*p
)->type
));
163 /* We always lower indirect dereferences for "compact" array vars. */
164 const unsigned index
= nir_src_as_uint((*p
)->arr
.index
);
165 const unsigned total_offset
= *component
+ index
;
166 const unsigned slot_offset
= total_offset
/ 4;
167 *component
= total_offset
% 4;
168 return nir_imm_int(b
, type_size(glsl_vec4_type()) * slot_offset
);
171 /* Just emit code and let constant-folding go to town */
172 nir_ssa_def
*offset
= nir_imm_int(b
, 0);
175 if ((*p
)->deref_type
== nir_deref_type_array
) {
176 unsigned size
= type_size((*p
)->type
);
179 nir_imul_imm(b
, nir_ssa_for_src(b
, (*p
)->arr
.index
, 1), size
);
181 offset
= nir_iadd(b
, offset
, mul
);
182 } else if ((*p
)->deref_type
== nir_deref_type_struct
) {
183 /* p starts at path[1], so this is safe */
184 nir_deref_instr
*parent
= *(p
- 1);
186 unsigned field_offset
= 0;
187 for (unsigned i
= 0; i
< (*p
)->strct
.index
; i
++) {
188 field_offset
+= type_size(glsl_get_struct_field(parent
->type
, i
));
190 offset
= nir_iadd_imm(b
, offset
, field_offset
);
192 unreachable("Unsupported deref type");
196 nir_deref_path_finish(&path
);
201 static nir_intrinsic_instr
*
202 lower_load(nir_intrinsic_instr
*intrin
, struct lower_io_state
*state
,
203 nir_ssa_def
*vertex_index
, nir_variable
*var
, nir_ssa_def
*offset
,
206 const nir_shader
*nir
= state
->builder
.shader
;
207 nir_variable_mode mode
= var
->data
.mode
;
208 nir_ssa_def
*barycentric
= NULL
;
212 case nir_var_shader_in
:
213 if (nir
->info
.stage
== MESA_SHADER_FRAGMENT
&&
214 nir
->options
->use_interpolated_input_intrinsics
&&
215 var
->data
.interpolation
!= INTERP_MODE_FLAT
) {
216 assert(vertex_index
== NULL
);
218 nir_intrinsic_op bary_op
;
219 if (var
->data
.sample
||
220 (state
->options
& nir_lower_io_force_sample_interpolation
))
221 bary_op
= nir_intrinsic_load_barycentric_sample
;
222 else if (var
->data
.centroid
)
223 bary_op
= nir_intrinsic_load_barycentric_centroid
;
225 bary_op
= nir_intrinsic_load_barycentric_pixel
;
227 barycentric
= nir_load_barycentric(&state
->builder
, bary_op
,
228 var
->data
.interpolation
);
229 op
= nir_intrinsic_load_interpolated_input
;
231 op
= vertex_index
? nir_intrinsic_load_per_vertex_input
:
232 nir_intrinsic_load_input
;
235 case nir_var_shader_out
:
236 op
= vertex_index
? nir_intrinsic_load_per_vertex_output
:
237 nir_intrinsic_load_output
;
239 case nir_var_uniform
:
240 op
= nir_intrinsic_load_uniform
;
242 case nir_var_mem_shared
:
243 op
= nir_intrinsic_load_shared
;
246 unreachable("Unknown variable mode");
249 nir_intrinsic_instr
*load
=
250 nir_intrinsic_instr_create(state
->builder
.shader
, op
);
251 load
->num_components
= intrin
->num_components
;
253 nir_intrinsic_set_base(load
, var
->data
.driver_location
);
254 if (mode
== nir_var_shader_in
|| mode
== nir_var_shader_out
)
255 nir_intrinsic_set_component(load
, component
);
257 if (load
->intrinsic
== nir_intrinsic_load_uniform
)
258 nir_intrinsic_set_range(load
, state
->type_size(var
->type
));
261 load
->src
[0] = nir_src_for_ssa(vertex_index
);
262 load
->src
[1] = nir_src_for_ssa(offset
);
263 } else if (barycentric
) {
264 load
->src
[0] = nir_src_for_ssa(barycentric
);
265 load
->src
[1] = nir_src_for_ssa(offset
);
267 load
->src
[0] = nir_src_for_ssa(offset
);
273 static nir_intrinsic_instr
*
274 lower_store(nir_intrinsic_instr
*intrin
, struct lower_io_state
*state
,
275 nir_ssa_def
*vertex_index
, nir_variable
*var
, nir_ssa_def
*offset
,
278 nir_variable_mode mode
= var
->data
.mode
;
281 if (mode
== nir_var_mem_shared
) {
282 op
= nir_intrinsic_store_shared
;
284 assert(mode
== nir_var_shader_out
);
285 op
= vertex_index
? nir_intrinsic_store_per_vertex_output
:
286 nir_intrinsic_store_output
;
289 nir_intrinsic_instr
*store
=
290 nir_intrinsic_instr_create(state
->builder
.shader
, op
);
291 store
->num_components
= intrin
->num_components
;
293 nir_src_copy(&store
->src
[0], &intrin
->src
[1], store
);
295 nir_intrinsic_set_base(store
, var
->data
.driver_location
);
297 if (mode
== nir_var_shader_out
)
298 nir_intrinsic_set_component(store
, component
);
300 nir_intrinsic_set_write_mask(store
, nir_intrinsic_write_mask(intrin
));
303 store
->src
[1] = nir_src_for_ssa(vertex_index
);
305 store
->src
[vertex_index
? 2 : 1] = nir_src_for_ssa(offset
);
310 static nir_intrinsic_instr
*
311 lower_atomic(nir_intrinsic_instr
*intrin
, struct lower_io_state
*state
,
312 nir_variable
*var
, nir_ssa_def
*offset
)
314 assert(var
->data
.mode
== nir_var_mem_shared
);
317 switch (intrin
->intrinsic
) {
318 #define OP(O) case nir_intrinsic_deref_##O: op = nir_intrinsic_shared_##O; break;
332 OP(atomic_fcomp_swap
)
335 unreachable("Invalid atomic");
338 nir_intrinsic_instr
*atomic
=
339 nir_intrinsic_instr_create(state
->builder
.shader
, op
);
341 nir_intrinsic_set_base(atomic
, var
->data
.driver_location
);
343 atomic
->src
[0] = nir_src_for_ssa(offset
);
344 assert(nir_intrinsic_infos
[intrin
->intrinsic
].num_srcs
==
345 nir_intrinsic_infos
[op
].num_srcs
);
346 for (unsigned i
= 1; i
< nir_intrinsic_infos
[op
].num_srcs
; i
++) {
347 nir_src_copy(&atomic
->src
[i
], &intrin
->src
[i
], atomic
);
353 static nir_intrinsic_instr
*
354 lower_interpolate_at(nir_intrinsic_instr
*intrin
, struct lower_io_state
*state
,
355 nir_variable
*var
, nir_ssa_def
*offset
, unsigned component
)
357 assert(var
->data
.mode
== nir_var_shader_in
);
359 /* Ignore interpolateAt() for flat variables - flat is flat. */
360 if (var
->data
.interpolation
== INTERP_MODE_FLAT
)
361 return lower_load(intrin
, state
, NULL
, var
, offset
, component
);
363 nir_intrinsic_op bary_op
;
364 switch (intrin
->intrinsic
) {
365 case nir_intrinsic_interp_deref_at_centroid
:
366 bary_op
= (state
->options
& nir_lower_io_force_sample_interpolation
) ?
367 nir_intrinsic_load_barycentric_sample
:
368 nir_intrinsic_load_barycentric_centroid
;
370 case nir_intrinsic_interp_deref_at_sample
:
371 bary_op
= nir_intrinsic_load_barycentric_at_sample
;
373 case nir_intrinsic_interp_deref_at_offset
:
374 bary_op
= nir_intrinsic_load_barycentric_at_offset
;
377 unreachable("Bogus interpolateAt() intrinsic.");
380 nir_intrinsic_instr
*bary_setup
=
381 nir_intrinsic_instr_create(state
->builder
.shader
, bary_op
);
383 nir_ssa_dest_init(&bary_setup
->instr
, &bary_setup
->dest
, 2, 32, NULL
);
384 nir_intrinsic_set_interp_mode(bary_setup
, var
->data
.interpolation
);
386 if (intrin
->intrinsic
== nir_intrinsic_interp_deref_at_sample
||
387 intrin
->intrinsic
== nir_intrinsic_interp_deref_at_offset
)
388 nir_src_copy(&bary_setup
->src
[0], &intrin
->src
[1], bary_setup
);
390 nir_builder_instr_insert(&state
->builder
, &bary_setup
->instr
);
392 nir_intrinsic_instr
*load
=
393 nir_intrinsic_instr_create(state
->builder
.shader
,
394 nir_intrinsic_load_interpolated_input
);
395 load
->num_components
= intrin
->num_components
;
397 nir_intrinsic_set_base(load
, var
->data
.driver_location
);
398 nir_intrinsic_set_component(load
, component
);
400 load
->src
[0] = nir_src_for_ssa(&bary_setup
->dest
.ssa
);
401 load
->src
[1] = nir_src_for_ssa(offset
);
407 nir_lower_io_block(nir_block
*block
,
408 struct lower_io_state
*state
)
410 nir_builder
*b
= &state
->builder
;
411 const nir_shader_compiler_options
*options
= b
->shader
->options
;
412 bool progress
= false;
414 nir_foreach_instr_safe(instr
, block
) {
415 if (instr
->type
!= nir_instr_type_intrinsic
)
418 nir_intrinsic_instr
*intrin
= nir_instr_as_intrinsic(instr
);
420 switch (intrin
->intrinsic
) {
421 case nir_intrinsic_load_deref
:
422 case nir_intrinsic_store_deref
:
423 case nir_intrinsic_deref_atomic_add
:
424 case nir_intrinsic_deref_atomic_imin
:
425 case nir_intrinsic_deref_atomic_umin
:
426 case nir_intrinsic_deref_atomic_imax
:
427 case nir_intrinsic_deref_atomic_umax
:
428 case nir_intrinsic_deref_atomic_and
:
429 case nir_intrinsic_deref_atomic_or
:
430 case nir_intrinsic_deref_atomic_xor
:
431 case nir_intrinsic_deref_atomic_exchange
:
432 case nir_intrinsic_deref_atomic_comp_swap
:
433 case nir_intrinsic_deref_atomic_fadd
:
434 case nir_intrinsic_deref_atomic_fmin
:
435 case nir_intrinsic_deref_atomic_fmax
:
436 case nir_intrinsic_deref_atomic_fcomp_swap
:
437 /* We can lower the io for this nir instrinsic */
439 case nir_intrinsic_interp_deref_at_centroid
:
440 case nir_intrinsic_interp_deref_at_sample
:
441 case nir_intrinsic_interp_deref_at_offset
:
442 /* We can optionally lower these to load_interpolated_input */
443 if (options
->use_interpolated_input_intrinsics
)
446 /* We can't lower the io for this nir instrinsic, so skip it */
450 nir_deref_instr
*deref
= nir_src_as_deref(intrin
->src
[0]);
452 nir_variable
*var
= nir_deref_instr_get_variable(deref
);
453 nir_variable_mode mode
= var
->data
.mode
;
455 if ((state
->modes
& mode
) == 0)
458 if (mode
!= nir_var_shader_in
&&
459 mode
!= nir_var_shader_out
&&
460 mode
!= nir_var_mem_shared
&&
461 mode
!= nir_var_uniform
)
464 b
->cursor
= nir_before_instr(instr
);
466 const bool per_vertex
= nir_is_per_vertex_io(var
, b
->shader
->info
.stage
);
469 nir_ssa_def
*vertex_index
= NULL
;
470 unsigned component_offset
= var
->data
.location_frac
;
472 offset
= get_io_offset(b
, deref
, per_vertex
? &vertex_index
: NULL
,
473 state
->type_size
, &component_offset
);
475 nir_intrinsic_instr
*replacement
;
477 switch (intrin
->intrinsic
) {
478 case nir_intrinsic_load_deref
:
479 replacement
= lower_load(intrin
, state
, vertex_index
, var
, offset
,
483 case nir_intrinsic_store_deref
:
484 replacement
= lower_store(intrin
, state
, vertex_index
, var
, offset
,
488 case nir_intrinsic_deref_atomic_add
:
489 case nir_intrinsic_deref_atomic_imin
:
490 case nir_intrinsic_deref_atomic_umin
:
491 case nir_intrinsic_deref_atomic_imax
:
492 case nir_intrinsic_deref_atomic_umax
:
493 case nir_intrinsic_deref_atomic_and
:
494 case nir_intrinsic_deref_atomic_or
:
495 case nir_intrinsic_deref_atomic_xor
:
496 case nir_intrinsic_deref_atomic_exchange
:
497 case nir_intrinsic_deref_atomic_comp_swap
:
498 case nir_intrinsic_deref_atomic_fadd
:
499 case nir_intrinsic_deref_atomic_fmin
:
500 case nir_intrinsic_deref_atomic_fmax
:
501 case nir_intrinsic_deref_atomic_fcomp_swap
:
502 assert(vertex_index
== NULL
);
503 replacement
= lower_atomic(intrin
, state
, var
, offset
);
506 case nir_intrinsic_interp_deref_at_centroid
:
507 case nir_intrinsic_interp_deref_at_sample
:
508 case nir_intrinsic_interp_deref_at_offset
:
509 assert(vertex_index
== NULL
);
510 replacement
= lower_interpolate_at(intrin
, state
, var
, offset
,
518 if (nir_intrinsic_infos
[intrin
->intrinsic
].has_dest
) {
519 if (intrin
->dest
.is_ssa
) {
520 nir_ssa_dest_init(&replacement
->instr
, &replacement
->dest
,
521 intrin
->dest
.ssa
.num_components
,
522 intrin
->dest
.ssa
.bit_size
, NULL
);
523 nir_ssa_def_rewrite_uses(&intrin
->dest
.ssa
,
524 nir_src_for_ssa(&replacement
->dest
.ssa
));
526 nir_dest_copy(&replacement
->dest
, &intrin
->dest
, &intrin
->instr
);
530 nir_instr_insert_before(&intrin
->instr
, &replacement
->instr
);
531 nir_instr_remove(&intrin
->instr
);
539 nir_lower_io_impl(nir_function_impl
*impl
,
540 nir_variable_mode modes
,
541 int (*type_size
)(const struct glsl_type
*),
542 nir_lower_io_options options
)
544 struct lower_io_state state
;
545 bool progress
= false;
547 nir_builder_init(&state
.builder
, impl
);
548 state
.dead_ctx
= ralloc_context(NULL
);
550 state
.type_size
= type_size
;
551 state
.options
= options
;
553 nir_foreach_block(block
, impl
) {
554 progress
|= nir_lower_io_block(block
, &state
);
557 ralloc_free(state
.dead_ctx
);
559 nir_metadata_preserve(impl
, nir_metadata_block_index
|
560 nir_metadata_dominance
);
565 nir_lower_io(nir_shader
*shader
, nir_variable_mode modes
,
566 int (*type_size
)(const struct glsl_type
*),
567 nir_lower_io_options options
)
569 bool progress
= false;
571 nir_foreach_function(function
, shader
) {
572 if (function
->impl
) {
573 progress
|= nir_lower_io_impl(function
->impl
, modes
,
582 type_scalar_size_bytes(const struct glsl_type
*type
)
584 assert(glsl_type_is_vector_or_scalar(type
) ||
585 glsl_type_is_matrix(type
));
586 return glsl_type_is_boolean(type
) ? 4 : glsl_get_bit_size(type
) / 8;
590 build_addr_iadd(nir_builder
*b
, nir_ssa_def
*addr
,
591 nir_address_format addr_format
, nir_ssa_def
*offset
)
593 assert(offset
->num_components
== 1);
594 assert(addr
->bit_size
== offset
->bit_size
);
596 switch (addr_format
) {
597 case nir_address_format_32bit_global
:
598 case nir_address_format_64bit_global
:
599 assert(addr
->num_components
== 1);
600 return nir_iadd(b
, addr
, offset
);
602 case nir_address_format_vk_index_offset
:
603 assert(addr
->num_components
== 2);
604 return nir_vec2(b
, nir_channel(b
, addr
, 0),
605 nir_iadd(b
, nir_channel(b
, addr
, 1), offset
));
607 unreachable("Invalid address format");
611 build_addr_iadd_imm(nir_builder
*b
, nir_ssa_def
*addr
,
612 nir_address_format addr_format
, int64_t offset
)
614 return build_addr_iadd(b
, addr
, addr_format
,
615 nir_imm_intN_t(b
, offset
, addr
->bit_size
));
619 addr_to_index(nir_builder
*b
, nir_ssa_def
*addr
,
620 nir_address_format addr_format
)
622 assert(addr_format
== nir_address_format_vk_index_offset
);
623 assert(addr
->num_components
== 2);
624 return nir_channel(b
, addr
, 0);
628 addr_to_offset(nir_builder
*b
, nir_ssa_def
*addr
,
629 nir_address_format addr_format
)
631 assert(addr_format
== nir_address_format_vk_index_offset
);
632 assert(addr
->num_components
== 2);
633 return nir_channel(b
, addr
, 1);
636 /** Returns true if the given address format resolves to a global address */
638 addr_format_is_global(nir_address_format addr_format
)
640 return addr_format
== nir_address_format_32bit_global
||
641 addr_format
== nir_address_format_64bit_global
;
645 addr_to_global(nir_builder
*b
, nir_ssa_def
*addr
,
646 nir_address_format addr_format
)
648 switch (addr_format
) {
649 case nir_address_format_32bit_global
:
650 case nir_address_format_64bit_global
:
651 assert(addr
->num_components
== 1);
654 case nir_address_format_vk_index_offset
:
655 unreachable("Cannot get a 64-bit address with this address format");
658 unreachable("Invalid address format");
662 build_explicit_io_load(nir_builder
*b
, nir_intrinsic_instr
*intrin
,
663 nir_ssa_def
*addr
, nir_address_format addr_format
,
664 unsigned num_components
)
666 nir_variable_mode mode
= nir_src_as_deref(intrin
->src
[0])->mode
;
670 case nir_var_mem_ubo
:
671 op
= nir_intrinsic_load_ubo
;
673 case nir_var_mem_ssbo
:
674 if (addr_format_is_global(addr_format
))
675 op
= nir_intrinsic_load_global
;
677 op
= nir_intrinsic_load_ssbo
;
680 unreachable("Unsupported explicit IO variable mode");
683 nir_intrinsic_instr
*load
= nir_intrinsic_instr_create(b
->shader
, op
);
685 if (addr_format_is_global(addr_format
)) {
686 assert(op
== nir_intrinsic_load_global
);
687 load
->src
[0] = nir_src_for_ssa(addr_to_global(b
, addr
, addr_format
));
689 load
->src
[0] = nir_src_for_ssa(addr_to_index(b
, addr
, addr_format
));
690 load
->src
[1] = nir_src_for_ssa(addr_to_offset(b
, addr
, addr_format
));
693 if (mode
!= nir_var_mem_ubo
)
694 nir_intrinsic_set_access(load
, nir_intrinsic_access(intrin
));
696 /* TODO: We should try and provide a better alignment. For OpenCL, we need
697 * to plumb the alignment through from SPIR-V when we have one.
699 nir_intrinsic_set_align(load
, intrin
->dest
.ssa
.bit_size
/ 8, 0);
701 assert(intrin
->dest
.is_ssa
);
702 load
->num_components
= num_components
;
703 nir_ssa_dest_init(&load
->instr
, &load
->dest
, num_components
,
704 intrin
->dest
.ssa
.bit_size
, intrin
->dest
.ssa
.name
);
705 nir_builder_instr_insert(b
, &load
->instr
);
707 return &load
->dest
.ssa
;
711 build_explicit_io_store(nir_builder
*b
, nir_intrinsic_instr
*intrin
,
712 nir_ssa_def
*addr
, nir_address_format addr_format
,
713 nir_ssa_def
*value
, nir_component_mask_t write_mask
)
715 nir_variable_mode mode
= nir_src_as_deref(intrin
->src
[0])->mode
;
719 case nir_var_mem_ssbo
:
720 if (addr_format_is_global(addr_format
))
721 op
= nir_intrinsic_store_global
;
723 op
= nir_intrinsic_store_ssbo
;
726 unreachable("Unsupported explicit IO variable mode");
729 nir_intrinsic_instr
*store
= nir_intrinsic_instr_create(b
->shader
, op
);
731 store
->src
[0] = nir_src_for_ssa(value
);
732 if (addr_format_is_global(addr_format
)) {
733 store
->src
[1] = nir_src_for_ssa(addr_to_global(b
, addr
, addr_format
));
735 store
->src
[1] = nir_src_for_ssa(addr_to_index(b
, addr
, addr_format
));
736 store
->src
[2] = nir_src_for_ssa(addr_to_offset(b
, addr
, addr_format
));
739 nir_intrinsic_set_write_mask(store
, write_mask
);
741 nir_intrinsic_set_access(store
, nir_intrinsic_access(intrin
));
743 /* TODO: We should try and provide a better alignment. For OpenCL, we need
744 * to plumb the alignment through from SPIR-V when we have one.
746 nir_intrinsic_set_align(store
, value
->bit_size
/ 8, 0);
748 assert(value
->num_components
== 1 ||
749 value
->num_components
== intrin
->num_components
);
750 store
->num_components
= value
->num_components
;
751 nir_builder_instr_insert(b
, &store
->instr
);
755 build_explicit_io_atomic(nir_builder
*b
, nir_intrinsic_instr
*intrin
,
756 nir_ssa_def
*addr
, nir_address_format addr_format
)
758 nir_variable_mode mode
= nir_src_as_deref(intrin
->src
[0])->mode
;
759 const unsigned num_data_srcs
=
760 nir_intrinsic_infos
[intrin
->intrinsic
].num_srcs
- 1;
764 case nir_var_mem_ssbo
:
765 if (addr_format_is_global(addr_format
))
766 op
= global_atomic_for_deref(intrin
->intrinsic
);
768 op
= ssbo_atomic_for_deref(intrin
->intrinsic
);
771 unreachable("Unsupported explicit IO variable mode");
774 nir_intrinsic_instr
*atomic
= nir_intrinsic_instr_create(b
->shader
, op
);
777 if (addr_format_is_global(addr_format
)) {
778 atomic
->src
[src
++] = nir_src_for_ssa(addr_to_global(b
, addr
, addr_format
));
780 atomic
->src
[src
++] = nir_src_for_ssa(addr_to_index(b
, addr
, addr_format
));
781 atomic
->src
[src
++] = nir_src_for_ssa(addr_to_offset(b
, addr
, addr_format
));
783 for (unsigned i
= 0; i
< num_data_srcs
; i
++) {
784 atomic
->src
[src
++] = nir_src_for_ssa(intrin
->src
[1 + i
].ssa
);
787 assert(intrin
->dest
.ssa
.num_components
== 1);
788 nir_ssa_dest_init(&atomic
->instr
, &atomic
->dest
,
789 1, intrin
->dest
.ssa
.bit_size
, intrin
->dest
.ssa
.name
);
790 nir_builder_instr_insert(b
, &atomic
->instr
);
792 return &atomic
->dest
.ssa
;
796 lower_explicit_io_deref(nir_builder
*b
, nir_deref_instr
*deref
,
797 nir_address_format addr_format
)
799 /* Just delete the deref if it's not used. We can't use
800 * nir_deref_instr_remove_if_unused here because it may remove more than
801 * one deref which could break our list walking since we walk the list
804 assert(list_empty(&deref
->dest
.ssa
.if_uses
));
805 if (list_empty(&deref
->dest
.ssa
.uses
)) {
806 nir_instr_remove(&deref
->instr
);
810 b
->cursor
= nir_after_instr(&deref
->instr
);
812 /* Var derefs must be lowered away by the driver */
813 assert(deref
->deref_type
!= nir_deref_type_var
);
815 assert(deref
->parent
.is_ssa
);
816 nir_ssa_def
*parent_addr
= deref
->parent
.ssa
;
818 nir_ssa_def
*addr
= NULL
;
819 assert(deref
->dest
.is_ssa
);
820 switch (deref
->deref_type
) {
821 case nir_deref_type_var
:
822 unreachable("Must be lowered by the driver");
825 case nir_deref_type_array
: {
826 nir_deref_instr
*parent
= nir_deref_instr_parent(deref
);
828 unsigned stride
= glsl_get_explicit_stride(parent
->type
);
829 if ((glsl_type_is_matrix(parent
->type
) &&
830 glsl_matrix_type_is_row_major(parent
->type
)) ||
831 (glsl_type_is_vector(parent
->type
) && stride
== 0))
832 stride
= type_scalar_size_bytes(parent
->type
);
836 nir_ssa_def
*index
= nir_ssa_for_src(b
, deref
->arr
.index
, 1);
837 index
= nir_i2i(b
, index
, parent_addr
->bit_size
);
838 addr
= build_addr_iadd(b
, parent_addr
, addr_format
,
839 nir_imul_imm(b
, index
, stride
));
843 case nir_deref_type_ptr_as_array
: {
844 nir_ssa_def
*index
= nir_ssa_for_src(b
, deref
->arr
.index
, 1);
845 index
= nir_i2i(b
, index
, parent_addr
->bit_size
);
846 unsigned stride
= nir_deref_instr_ptr_as_array_stride(deref
);
847 addr
= build_addr_iadd(b
, parent_addr
, addr_format
,
848 nir_imul_imm(b
, index
, stride
));
852 case nir_deref_type_array_wildcard
:
853 unreachable("Wildcards should be lowered by now");
856 case nir_deref_type_struct
: {
857 nir_deref_instr
*parent
= nir_deref_instr_parent(deref
);
858 int offset
= glsl_get_struct_field_offset(parent
->type
,
861 addr
= build_addr_iadd_imm(b
, parent_addr
, addr_format
, offset
);
865 case nir_deref_type_cast
:
866 /* Nothing to do here */
871 nir_instr_remove(&deref
->instr
);
872 nir_ssa_def_rewrite_uses(&deref
->dest
.ssa
, nir_src_for_ssa(addr
));
876 lower_explicit_io_access(nir_builder
*b
, nir_intrinsic_instr
*intrin
,
877 nir_address_format addr_format
)
879 b
->cursor
= nir_after_instr(&intrin
->instr
);
881 nir_deref_instr
*deref
= nir_src_as_deref(intrin
->src
[0]);
882 unsigned vec_stride
= glsl_get_explicit_stride(deref
->type
);
883 unsigned scalar_size
= type_scalar_size_bytes(deref
->type
);
884 assert(vec_stride
== 0 || glsl_type_is_vector(deref
->type
));
885 assert(vec_stride
== 0 || vec_stride
>= scalar_size
);
887 nir_ssa_def
*addr
= &deref
->dest
.ssa
;
888 if (intrin
->intrinsic
== nir_intrinsic_load_deref
) {
890 if (vec_stride
> scalar_size
) {
891 nir_ssa_def
*comps
[4] = { NULL
, };
892 for (unsigned i
= 0; i
< intrin
->num_components
; i
++) {
893 nir_ssa_def
*comp_addr
= build_addr_iadd_imm(b
, addr
, addr_format
,
895 comps
[i
] = build_explicit_io_load(b
, intrin
, comp_addr
,
898 value
= nir_vec(b
, comps
, intrin
->num_components
);
900 value
= build_explicit_io_load(b
, intrin
, addr
, addr_format
,
901 intrin
->num_components
);
903 nir_ssa_def_rewrite_uses(&intrin
->dest
.ssa
, nir_src_for_ssa(value
));
904 } else if (intrin
->intrinsic
== nir_intrinsic_store_deref
) {
905 assert(intrin
->src
[1].is_ssa
);
906 nir_ssa_def
*value
= intrin
->src
[1].ssa
;
907 nir_component_mask_t write_mask
= nir_intrinsic_write_mask(intrin
);
908 if (vec_stride
> scalar_size
) {
909 for (unsigned i
= 0; i
< intrin
->num_components
; i
++) {
910 if (!(write_mask
& (1 << i
)))
913 nir_ssa_def
*comp_addr
= build_addr_iadd_imm(b
, addr
, addr_format
,
915 build_explicit_io_store(b
, intrin
, comp_addr
, addr_format
,
916 nir_channel(b
, value
, i
), 1);
919 build_explicit_io_store(b
, intrin
, addr
, addr_format
,
924 build_explicit_io_atomic(b
, intrin
, addr
, addr_format
);
925 nir_ssa_def_rewrite_uses(&intrin
->dest
.ssa
, nir_src_for_ssa(value
));
928 nir_instr_remove(&intrin
->instr
);
932 nir_lower_explicit_io_impl(nir_function_impl
*impl
, nir_variable_mode modes
,
933 nir_address_format addr_format
)
935 bool progress
= false;
938 nir_builder_init(&b
, impl
);
940 /* Walk in reverse order so that we can see the full deref chain when we
941 * lower the access operations. We lower them assuming that the derefs
942 * will be turned into address calculations later.
944 nir_foreach_block_reverse(block
, impl
) {
945 nir_foreach_instr_reverse_safe(instr
, block
) {
946 switch (instr
->type
) {
947 case nir_instr_type_deref
: {
948 nir_deref_instr
*deref
= nir_instr_as_deref(instr
);
949 if (deref
->mode
& modes
) {
950 lower_explicit_io_deref(&b
, deref
, addr_format
);
956 case nir_instr_type_intrinsic
: {
957 nir_intrinsic_instr
*intrin
= nir_instr_as_intrinsic(instr
);
958 switch (intrin
->intrinsic
) {
959 case nir_intrinsic_load_deref
:
960 case nir_intrinsic_store_deref
:
961 case nir_intrinsic_deref_atomic_add
:
962 case nir_intrinsic_deref_atomic_imin
:
963 case nir_intrinsic_deref_atomic_umin
:
964 case nir_intrinsic_deref_atomic_imax
:
965 case nir_intrinsic_deref_atomic_umax
:
966 case nir_intrinsic_deref_atomic_and
:
967 case nir_intrinsic_deref_atomic_or
:
968 case nir_intrinsic_deref_atomic_xor
:
969 case nir_intrinsic_deref_atomic_exchange
:
970 case nir_intrinsic_deref_atomic_comp_swap
:
971 case nir_intrinsic_deref_atomic_fadd
:
972 case nir_intrinsic_deref_atomic_fmin
:
973 case nir_intrinsic_deref_atomic_fmax
:
974 case nir_intrinsic_deref_atomic_fcomp_swap
: {
975 nir_deref_instr
*deref
= nir_src_as_deref(intrin
->src
[0]);
976 if (deref
->mode
& modes
) {
977 lower_explicit_io_access(&b
, intrin
, addr_format
);
997 nir_metadata_preserve(impl
, nir_metadata_block_index
|
998 nir_metadata_dominance
);
1005 nir_lower_explicit_io(nir_shader
*shader
, nir_variable_mode modes
,
1006 nir_address_format addr_format
)
1008 bool progress
= false;
1010 nir_foreach_function(function
, shader
) {
1011 if (function
->impl
&&
1012 nir_lower_explicit_io_impl(function
->impl
, modes
, addr_format
))
1020 * Return the offset source for a load/store intrinsic.
1023 nir_get_io_offset_src(nir_intrinsic_instr
*instr
)
1025 switch (instr
->intrinsic
) {
1026 case nir_intrinsic_load_input
:
1027 case nir_intrinsic_load_output
:
1028 case nir_intrinsic_load_shared
:
1029 case nir_intrinsic_load_uniform
:
1030 case nir_intrinsic_load_global
:
1031 return &instr
->src
[0];
1032 case nir_intrinsic_load_ubo
:
1033 case nir_intrinsic_load_ssbo
:
1034 case nir_intrinsic_load_per_vertex_input
:
1035 case nir_intrinsic_load_per_vertex_output
:
1036 case nir_intrinsic_load_interpolated_input
:
1037 case nir_intrinsic_store_output
:
1038 case nir_intrinsic_store_shared
:
1039 case nir_intrinsic_store_global
:
1040 return &instr
->src
[1];
1041 case nir_intrinsic_store_ssbo
:
1042 case nir_intrinsic_store_per_vertex_output
:
1043 return &instr
->src
[2];
1050 * Return the vertex index source for a load/store per_vertex intrinsic.
1053 nir_get_io_vertex_index_src(nir_intrinsic_instr
*instr
)
1055 switch (instr
->intrinsic
) {
1056 case nir_intrinsic_load_per_vertex_input
:
1057 case nir_intrinsic_load_per_vertex_output
:
1058 return &instr
->src
[0];
1059 case nir_intrinsic_store_per_vertex_output
:
1060 return &instr
->src
[1];