2 * Copyright 2017 Advanced Micro Devices, Inc.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 #include "si_shader_internal.h"
28 #include "ac_nir_to_llvm.h"
30 #include "tgsi/tgsi_from_mesa.h"
32 #include "compiler/nir/nir.h"
33 #include "compiler/nir_types.h"
35 static nir_variable
* tex_get_texture_var(nir_tex_instr
*instr
)
37 for (unsigned i
= 0; i
< instr
->num_srcs
; i
++) {
38 switch (instr
->src
[i
].src_type
) {
39 case nir_tex_src_texture_deref
:
40 return nir_deref_instr_get_variable(nir_src_as_deref(instr
->src
[i
].src
));
49 static nir_variable
* intrinsic_get_var(nir_intrinsic_instr
*instr
)
51 return nir_deref_instr_get_variable(nir_src_as_deref(instr
->src
[0]));
54 static void gather_intrinsic_load_deref_info(const nir_shader
*nir
,
55 const nir_intrinsic_instr
*instr
,
57 struct tgsi_shader_info
*info
)
59 assert(var
&& var
->data
.mode
== nir_var_shader_in
);
61 switch (nir
->info
.stage
) {
62 case MESA_SHADER_VERTEX
: {
63 unsigned i
= var
->data
.driver_location
;
64 unsigned attrib_count
= glsl_count_attribute_slots(var
->type
, false);
66 for (unsigned j
= 0; j
< attrib_count
; j
++, i
++) {
67 if (glsl_type_is_64bit(glsl_without_array(var
->type
))) {
68 /* TODO: set usage mask more accurately for doubles */
69 info
->input_usage_mask
[i
] = TGSI_WRITEMASK_XYZW
;
71 uint8_t mask
= nir_ssa_def_components_read(&instr
->dest
.ssa
);
72 info
->input_usage_mask
[i
] |= mask
<< var
->data
.location_frac
;
78 unsigned semantic_name
, semantic_index
;
79 tgsi_get_gl_varying_semantic(var
->data
.location
, true,
80 &semantic_name
, &semantic_index
);
82 if (semantic_name
== TGSI_SEMANTIC_COLOR
) {
83 uint8_t mask
= nir_ssa_def_components_read(&instr
->dest
.ssa
);
84 info
->colors_read
|= mask
<< (semantic_index
* 4);
91 static void scan_instruction(const struct nir_shader
*nir
,
92 struct tgsi_shader_info
*info
,
95 if (instr
->type
== nir_instr_type_alu
) {
96 nir_alu_instr
*alu
= nir_instr_as_alu(instr
);
101 case nir_op_fddx_fine
:
102 case nir_op_fddy_fine
:
103 case nir_op_fddx_coarse
:
104 case nir_op_fddy_coarse
:
105 info
->uses_derivatives
= true;
110 } else if (instr
->type
== nir_instr_type_tex
) {
111 nir_tex_instr
*tex
= nir_instr_as_tex(instr
);
112 nir_variable
*texture
= tex_get_texture_var(tex
);
115 info
->samplers_declared
|=
116 u_bit_consecutive(tex
->sampler_index
, 1);
118 if (texture
->data
.bindless
)
119 info
->uses_bindless_samplers
= true;
126 info
->uses_derivatives
= true;
131 } else if (instr
->type
== nir_instr_type_intrinsic
) {
132 nir_intrinsic_instr
*intr
= nir_instr_as_intrinsic(instr
);
134 switch (intr
->intrinsic
) {
135 case nir_intrinsic_load_front_face
:
136 info
->uses_frontface
= 1;
138 case nir_intrinsic_load_instance_id
:
139 info
->uses_instanceid
= 1;
141 case nir_intrinsic_load_invocation_id
:
142 info
->uses_invocationid
= true;
144 case nir_intrinsic_load_num_work_groups
:
145 info
->uses_grid_size
= true;
147 case nir_intrinsic_load_local_group_size
:
148 /* The block size is translated to IMM with a fixed block size. */
149 if (info
->properties
[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH
] == 0)
150 info
->uses_block_size
= true;
152 case nir_intrinsic_load_local_invocation_id
:
153 case nir_intrinsic_load_work_group_id
: {
154 unsigned mask
= nir_ssa_def_components_read(&intr
->dest
.ssa
);
156 unsigned i
= u_bit_scan(&mask
);
158 if (intr
->intrinsic
== nir_intrinsic_load_work_group_id
)
159 info
->uses_block_id
[i
] = true;
161 info
->uses_thread_id
[i
] = true;
165 case nir_intrinsic_load_vertex_id
:
166 info
->uses_vertexid
= 1;
168 case nir_intrinsic_load_vertex_id_zero_base
:
169 info
->uses_vertexid_nobase
= 1;
171 case nir_intrinsic_load_base_vertex
:
172 info
->uses_basevertex
= 1;
174 case nir_intrinsic_load_draw_id
:
175 info
->uses_drawid
= 1;
177 case nir_intrinsic_load_primitive_id
:
178 info
->uses_primid
= 1;
180 case nir_intrinsic_load_sample_mask_in
:
181 info
->reads_samplemask
= true;
183 case nir_intrinsic_load_tess_level_inner
:
184 case nir_intrinsic_load_tess_level_outer
:
185 info
->reads_tess_factors
= true;
187 case nir_intrinsic_bindless_image_load
:
188 info
->uses_bindless_images
= true;
190 if (nir_intrinsic_image_dim(intr
) == GLSL_SAMPLER_DIM_BUF
)
191 info
->uses_bindless_buffer_load
= true;
193 info
->uses_bindless_image_load
= true;
195 case nir_intrinsic_bindless_image_size
:
196 case nir_intrinsic_bindless_image_samples
:
197 info
->uses_bindless_images
= true;
199 case nir_intrinsic_bindless_image_store
:
200 info
->uses_bindless_images
= true;
202 if (nir_intrinsic_image_dim(intr
) == GLSL_SAMPLER_DIM_BUF
)
203 info
->uses_bindless_buffer_store
= true;
205 info
->uses_bindless_image_store
= true;
207 info
->writes_memory
= true;
209 case nir_intrinsic_image_deref_store
:
210 info
->writes_memory
= true;
212 case nir_intrinsic_bindless_image_atomic_add
:
213 case nir_intrinsic_bindless_image_atomic_min
:
214 case nir_intrinsic_bindless_image_atomic_max
:
215 case nir_intrinsic_bindless_image_atomic_and
:
216 case nir_intrinsic_bindless_image_atomic_or
:
217 case nir_intrinsic_bindless_image_atomic_xor
:
218 case nir_intrinsic_bindless_image_atomic_exchange
:
219 case nir_intrinsic_bindless_image_atomic_comp_swap
:
220 info
->uses_bindless_images
= true;
222 if (nir_intrinsic_image_dim(intr
) == GLSL_SAMPLER_DIM_BUF
)
223 info
->uses_bindless_buffer_atomic
= true;
225 info
->uses_bindless_image_atomic
= true;
227 info
->writes_memory
= true;
229 case nir_intrinsic_image_deref_atomic_add
:
230 case nir_intrinsic_image_deref_atomic_min
:
231 case nir_intrinsic_image_deref_atomic_max
:
232 case nir_intrinsic_image_deref_atomic_and
:
233 case nir_intrinsic_image_deref_atomic_or
:
234 case nir_intrinsic_image_deref_atomic_xor
:
235 case nir_intrinsic_image_deref_atomic_exchange
:
236 case nir_intrinsic_image_deref_atomic_comp_swap
:
237 info
->writes_memory
= true;
239 case nir_intrinsic_store_ssbo
:
240 case nir_intrinsic_ssbo_atomic_add
:
241 case nir_intrinsic_ssbo_atomic_imin
:
242 case nir_intrinsic_ssbo_atomic_umin
:
243 case nir_intrinsic_ssbo_atomic_imax
:
244 case nir_intrinsic_ssbo_atomic_umax
:
245 case nir_intrinsic_ssbo_atomic_and
:
246 case nir_intrinsic_ssbo_atomic_or
:
247 case nir_intrinsic_ssbo_atomic_xor
:
248 case nir_intrinsic_ssbo_atomic_exchange
:
249 case nir_intrinsic_ssbo_atomic_comp_swap
:
250 info
->writes_memory
= true;
252 case nir_intrinsic_load_deref
: {
253 nir_variable
*var
= intrinsic_get_var(intr
);
254 nir_variable_mode mode
= var
->data
.mode
;
255 enum glsl_base_type base_type
=
256 glsl_get_base_type(glsl_without_array(var
->type
));
258 if (mode
== nir_var_shader_in
) {
259 gather_intrinsic_load_deref_info(nir
, intr
, var
, info
);
261 switch (var
->data
.interpolation
) {
262 case INTERP_MODE_NONE
:
263 if (glsl_base_type_is_integer(base_type
))
267 case INTERP_MODE_SMOOTH
:
268 if (var
->data
.sample
)
269 info
->uses_persp_sample
= true;
270 else if (var
->data
.centroid
)
271 info
->uses_persp_centroid
= true;
273 info
->uses_persp_center
= true;
276 case INTERP_MODE_NOPERSPECTIVE
:
277 if (var
->data
.sample
)
278 info
->uses_linear_sample
= true;
279 else if (var
->data
.centroid
)
280 info
->uses_linear_centroid
= true;
282 info
->uses_linear_center
= true;
288 case nir_intrinsic_interp_deref_at_centroid
:
289 case nir_intrinsic_interp_deref_at_sample
:
290 case nir_intrinsic_interp_deref_at_offset
: {
291 enum glsl_interp_mode interp
= intrinsic_get_var(intr
)->data
.interpolation
;
293 case INTERP_MODE_SMOOTH
:
294 case INTERP_MODE_NONE
:
295 if (intr
->intrinsic
== nir_intrinsic_interp_deref_at_centroid
)
296 info
->uses_persp_opcode_interp_centroid
= true;
297 else if (intr
->intrinsic
== nir_intrinsic_interp_deref_at_sample
)
298 info
->uses_persp_opcode_interp_sample
= true;
300 info
->uses_persp_opcode_interp_offset
= true;
302 case INTERP_MODE_NOPERSPECTIVE
:
303 if (intr
->intrinsic
== nir_intrinsic_interp_deref_at_centroid
)
304 info
->uses_linear_opcode_interp_centroid
= true;
305 else if (intr
->intrinsic
== nir_intrinsic_interp_deref_at_sample
)
306 info
->uses_linear_opcode_interp_sample
= true;
308 info
->uses_linear_opcode_interp_offset
= true;
310 case INTERP_MODE_FLAT
:
313 unreachable("Unsupported interpoation type");
323 void si_nir_scan_tess_ctrl(const struct nir_shader
*nir
,
324 struct tgsi_tessctrl_info
*out
)
326 memset(out
, 0, sizeof(*out
));
328 if (nir
->info
.stage
!= MESA_SHADER_TESS_CTRL
)
331 out
->tessfactors_are_def_in_all_invocs
=
332 ac_are_tessfactors_def_in_all_invocs(nir
);
335 void si_nir_scan_shader(const struct nir_shader
*nir
,
336 struct tgsi_shader_info
*info
)
341 info
->processor
= pipe_shader_type_from_mesa(nir
->info
.stage
);
342 info
->num_tokens
= 2; /* indicate that the shader is non-empty */
343 info
->num_instructions
= 2;
345 info
->properties
[TGSI_PROPERTY_NEXT_SHADER
] =
346 pipe_shader_type_from_mesa(nir
->info
.next_stage
);
348 if (nir
->info
.stage
== MESA_SHADER_VERTEX
) {
349 info
->properties
[TGSI_PROPERTY_VS_WINDOW_SPACE_POSITION
] =
350 nir
->info
.vs
.window_space_position
;
353 if (nir
->info
.stage
== MESA_SHADER_TESS_CTRL
) {
354 info
->properties
[TGSI_PROPERTY_TCS_VERTICES_OUT
] =
355 nir
->info
.tess
.tcs_vertices_out
;
358 if (nir
->info
.stage
== MESA_SHADER_TESS_EVAL
) {
359 if (nir
->info
.tess
.primitive_mode
== GL_ISOLINES
)
360 info
->properties
[TGSI_PROPERTY_TES_PRIM_MODE
] = PIPE_PRIM_LINES
;
362 info
->properties
[TGSI_PROPERTY_TES_PRIM_MODE
] = nir
->info
.tess
.primitive_mode
;
364 STATIC_ASSERT((TESS_SPACING_EQUAL
+ 1) % 3 == PIPE_TESS_SPACING_EQUAL
);
365 STATIC_ASSERT((TESS_SPACING_FRACTIONAL_ODD
+ 1) % 3 ==
366 PIPE_TESS_SPACING_FRACTIONAL_ODD
);
367 STATIC_ASSERT((TESS_SPACING_FRACTIONAL_EVEN
+ 1) % 3 ==
368 PIPE_TESS_SPACING_FRACTIONAL_EVEN
);
370 info
->properties
[TGSI_PROPERTY_TES_SPACING
] = (nir
->info
.tess
.spacing
+ 1) % 3;
371 info
->properties
[TGSI_PROPERTY_TES_VERTEX_ORDER_CW
] = !nir
->info
.tess
.ccw
;
372 info
->properties
[TGSI_PROPERTY_TES_POINT_MODE
] = nir
->info
.tess
.point_mode
;
375 if (nir
->info
.stage
== MESA_SHADER_GEOMETRY
) {
376 info
->properties
[TGSI_PROPERTY_GS_INPUT_PRIM
] = nir
->info
.gs
.input_primitive
;
377 info
->properties
[TGSI_PROPERTY_GS_OUTPUT_PRIM
] = nir
->info
.gs
.output_primitive
;
378 info
->properties
[TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES
] = nir
->info
.gs
.vertices_out
;
379 info
->properties
[TGSI_PROPERTY_GS_INVOCATIONS
] = nir
->info
.gs
.invocations
;
382 if (nir
->info
.stage
== MESA_SHADER_FRAGMENT
) {
383 info
->properties
[TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL
] =
384 nir
->info
.fs
.early_fragment_tests
| nir
->info
.fs
.post_depth_coverage
;
385 info
->properties
[TGSI_PROPERTY_FS_POST_DEPTH_COVERAGE
] = nir
->info
.fs
.post_depth_coverage
;
387 if (nir
->info
.fs
.pixel_center_integer
) {
388 info
->properties
[TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
] =
389 TGSI_FS_COORD_PIXEL_CENTER_INTEGER
;
392 if (nir
->info
.fs
.depth_layout
!= FRAG_DEPTH_LAYOUT_NONE
) {
393 switch (nir
->info
.fs
.depth_layout
) {
394 case FRAG_DEPTH_LAYOUT_ANY
:
395 info
->properties
[TGSI_PROPERTY_FS_DEPTH_LAYOUT
] = TGSI_FS_DEPTH_LAYOUT_ANY
;
397 case FRAG_DEPTH_LAYOUT_GREATER
:
398 info
->properties
[TGSI_PROPERTY_FS_DEPTH_LAYOUT
] = TGSI_FS_DEPTH_LAYOUT_GREATER
;
400 case FRAG_DEPTH_LAYOUT_LESS
:
401 info
->properties
[TGSI_PROPERTY_FS_DEPTH_LAYOUT
] = TGSI_FS_DEPTH_LAYOUT_LESS
;
403 case FRAG_DEPTH_LAYOUT_UNCHANGED
:
404 info
->properties
[TGSI_PROPERTY_FS_DEPTH_LAYOUT
] = TGSI_FS_DEPTH_LAYOUT_UNCHANGED
;
407 unreachable("Unknow depth layout");
412 if (gl_shader_stage_is_compute(nir
->info
.stage
)) {
413 info
->properties
[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH
] = nir
->info
.cs
.local_size
[0];
414 info
->properties
[TGSI_PROPERTY_CS_FIXED_BLOCK_HEIGHT
] = nir
->info
.cs
.local_size
[1];
415 info
->properties
[TGSI_PROPERTY_CS_FIXED_BLOCK_DEPTH
] = nir
->info
.cs
.local_size
[2];
419 uint64_t processed_inputs
= 0;
420 unsigned num_inputs
= 0;
421 nir_foreach_variable(variable
, &nir
->inputs
) {
422 unsigned semantic_name
, semantic_index
;
424 const struct glsl_type
*type
= variable
->type
;
425 if (nir_is_per_vertex_io(variable
, nir
->info
.stage
)) {
426 assert(glsl_type_is_array(type
));
427 type
= glsl_get_array_element(type
);
430 unsigned attrib_count
= glsl_count_attribute_slots(type
,
431 nir
->info
.stage
== MESA_SHADER_VERTEX
);
433 i
= variable
->data
.driver_location
;
435 /* Vertex shader inputs don't have semantics. The state
436 * tracker has already mapped them to attributes via
437 * variable->data.driver_location.
439 if (nir
->info
.stage
== MESA_SHADER_VERTEX
) {
440 if (glsl_type_is_dual_slot(glsl_without_array(variable
->type
)))
447 for (unsigned j
= 0; j
< attrib_count
; j
++, i
++) {
449 if (processed_inputs
& ((uint64_t)1 << i
))
452 processed_inputs
|= ((uint64_t)1 << i
);
455 tgsi_get_gl_varying_semantic(variable
->data
.location
+ j
, true,
456 &semantic_name
, &semantic_index
);
458 info
->input_semantic_name
[i
] = semantic_name
;
459 info
->input_semantic_index
[i
] = semantic_index
;
461 if (semantic_name
== TGSI_SEMANTIC_PRIMID
)
462 info
->uses_primid
= true;
464 if (variable
->data
.sample
)
465 info
->input_interpolate_loc
[i
] = TGSI_INTERPOLATE_LOC_SAMPLE
;
466 else if (variable
->data
.centroid
)
467 info
->input_interpolate_loc
[i
] = TGSI_INTERPOLATE_LOC_CENTROID
;
469 info
->input_interpolate_loc
[i
] = TGSI_INTERPOLATE_LOC_CENTER
;
471 enum glsl_base_type base_type
=
472 glsl_get_base_type(glsl_without_array(variable
->type
));
474 switch (variable
->data
.interpolation
) {
475 case INTERP_MODE_NONE
:
476 if (glsl_base_type_is_integer(base_type
)) {
477 info
->input_interpolate
[i
] = TGSI_INTERPOLATE_CONSTANT
;
481 if (semantic_name
== TGSI_SEMANTIC_COLOR
) {
482 info
->input_interpolate
[i
] = TGSI_INTERPOLATE_COLOR
;
487 case INTERP_MODE_SMOOTH
:
488 assert(!glsl_base_type_is_integer(base_type
));
490 info
->input_interpolate
[i
] = TGSI_INTERPOLATE_PERSPECTIVE
;
493 case INTERP_MODE_NOPERSPECTIVE
:
494 assert(!glsl_base_type_is_integer(base_type
));
496 info
->input_interpolate
[i
] = TGSI_INTERPOLATE_LINEAR
;
499 case INTERP_MODE_FLAT
:
500 info
->input_interpolate
[i
] = TGSI_INTERPOLATE_CONSTANT
;
506 info
->num_inputs
= num_inputs
;
510 uint64_t processed_outputs
= 0;
511 unsigned num_outputs
= 0;
512 nir_foreach_variable(variable
, &nir
->outputs
) {
513 unsigned semantic_name
, semantic_index
;
515 i
= variable
->data
.driver_location
;
517 const struct glsl_type
*type
= variable
->type
;
518 if (nir_is_per_vertex_io(variable
, nir
->info
.stage
)) {
519 assert(glsl_type_is_array(type
));
520 type
= glsl_get_array_element(type
);
523 unsigned attrib_count
= glsl_count_attribute_slots(type
, false);
524 for (unsigned k
= 0; k
< attrib_count
; k
++, i
++) {
526 if (nir
->info
.stage
== MESA_SHADER_FRAGMENT
) {
527 tgsi_get_gl_frag_result_semantic(variable
->data
.location
+ k
,
528 &semantic_name
, &semantic_index
);
530 /* Adjust for dual source blending */
531 if (variable
->data
.index
> 0) {
535 tgsi_get_gl_varying_semantic(variable
->data
.location
+ k
, true,
536 &semantic_name
, &semantic_index
);
539 unsigned num_components
= 4;
540 unsigned vector_elements
= glsl_get_vector_elements(glsl_without_array(variable
->type
));
542 num_components
= vector_elements
;
544 unsigned component
= variable
->data
.location_frac
;
545 if (glsl_type_is_64bit(glsl_without_array(variable
->type
))) {
546 if (glsl_type_is_dual_slot(glsl_without_array(variable
->type
)) && k
% 2) {
547 num_components
= (num_components
* 2) - 4;
550 num_components
= MIN2(num_components
* 2, 4);
555 for (unsigned j
= component
; j
< num_components
+ component
; j
++) {
558 usagemask
|= TGSI_WRITEMASK_X
;
561 usagemask
|= TGSI_WRITEMASK_Y
;
564 usagemask
|= TGSI_WRITEMASK_Z
;
567 usagemask
|= TGSI_WRITEMASK_W
;
570 unreachable("error calculating component index");
574 unsigned gs_out_streams
;
575 if (variable
->data
.stream
& (1u << 31)) {
576 gs_out_streams
= variable
->data
.stream
& ~(1u << 31);
578 assert(variable
->data
.stream
< 4);
580 for (unsigned j
= 0; j
< num_components
; ++j
)
581 gs_out_streams
|= variable
->data
.stream
<< (2 * (component
+ j
));
584 unsigned streamx
= gs_out_streams
& 3;
585 unsigned streamy
= (gs_out_streams
>> 2) & 3;
586 unsigned streamz
= (gs_out_streams
>> 4) & 3;
587 unsigned streamw
= (gs_out_streams
>> 6) & 3;
589 if (usagemask
& TGSI_WRITEMASK_X
) {
590 info
->output_usagemask
[i
] |= TGSI_WRITEMASK_X
;
591 info
->output_streams
[i
] |= streamx
;
592 info
->num_stream_output_components
[streamx
]++;
594 if (usagemask
& TGSI_WRITEMASK_Y
) {
595 info
->output_usagemask
[i
] |= TGSI_WRITEMASK_Y
;
596 info
->output_streams
[i
] |= streamy
<< 2;
597 info
->num_stream_output_components
[streamy
]++;
599 if (usagemask
& TGSI_WRITEMASK_Z
) {
600 info
->output_usagemask
[i
] |= TGSI_WRITEMASK_Z
;
601 info
->output_streams
[i
] |= streamz
<< 4;
602 info
->num_stream_output_components
[streamz
]++;
604 if (usagemask
& TGSI_WRITEMASK_W
) {
605 info
->output_usagemask
[i
] |= TGSI_WRITEMASK_W
;
606 info
->output_streams
[i
] |= streamw
<< 6;
607 info
->num_stream_output_components
[streamw
]++;
610 /* make sure we only count this location once against
611 * the num_outputs counter.
613 if (processed_outputs
& ((uint64_t)1 << i
))
616 processed_outputs
|= ((uint64_t)1 << i
);
619 info
->output_semantic_name
[i
] = semantic_name
;
620 info
->output_semantic_index
[i
] = semantic_index
;
622 switch (semantic_name
) {
623 case TGSI_SEMANTIC_PRIMID
:
624 info
->writes_primid
= true;
626 case TGSI_SEMANTIC_VIEWPORT_INDEX
:
627 info
->writes_viewport_index
= true;
629 case TGSI_SEMANTIC_LAYER
:
630 info
->writes_layer
= true;
632 case TGSI_SEMANTIC_PSIZE
:
633 info
->writes_psize
= true;
635 case TGSI_SEMANTIC_CLIPVERTEX
:
636 info
->writes_clipvertex
= true;
638 case TGSI_SEMANTIC_COLOR
:
639 info
->colors_written
|= 1 << semantic_index
;
641 case TGSI_SEMANTIC_STENCIL
:
642 info
->writes_stencil
= true;
644 case TGSI_SEMANTIC_SAMPLEMASK
:
645 info
->writes_samplemask
= true;
647 case TGSI_SEMANTIC_EDGEFLAG
:
648 info
->writes_edgeflag
= true;
650 case TGSI_SEMANTIC_POSITION
:
651 if (info
->processor
== PIPE_SHADER_FRAGMENT
)
652 info
->writes_z
= true;
654 info
->writes_position
= true;
658 if (nir
->info
.stage
== MESA_SHADER_TESS_CTRL
) {
659 switch (semantic_name
) {
660 case TGSI_SEMANTIC_PATCH
:
661 info
->reads_perpatch_outputs
= true;
663 case TGSI_SEMANTIC_TESSINNER
:
664 case TGSI_SEMANTIC_TESSOUTER
:
665 info
->reads_tessfactor_outputs
= true;
668 info
->reads_pervertex_outputs
= true;
673 unsigned loc
= variable
->data
.location
;
674 if (nir
->info
.stage
== MESA_SHADER_FRAGMENT
&&
675 loc
== FRAG_RESULT_COLOR
&&
676 nir
->info
.outputs_written
& (1ull << loc
)) {
677 assert(attrib_count
== 1);
678 info
->properties
[TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
] = true;
682 info
->num_outputs
= num_outputs
;
684 struct set
*ubo_set
= _mesa_set_create(NULL
, _mesa_hash_pointer
,
685 _mesa_key_pointer_equal
);
686 struct set
*ssbo_set
= _mesa_set_create(NULL
, _mesa_hash_pointer
,
687 _mesa_key_pointer_equal
);
689 /* Intialise const_file_max[0] */
690 info
->const_file_max
[0] = -1;
692 /* The first 8 are reserved for atomic counters using ssbo */
693 unsigned ssbo_idx
= 8;
695 unsigned ubo_idx
= 1;
696 nir_foreach_variable(variable
, &nir
->uniforms
) {
697 const struct glsl_type
*type
= variable
->type
;
698 enum glsl_base_type base_type
=
699 glsl_get_base_type(glsl_without_array(type
));
700 unsigned aoa_size
= MAX2(1, glsl_get_aoa_size(type
));
701 unsigned loc
= variable
->data
.driver_location
/ 4;
702 int slot_count
= glsl_count_attribute_slots(type
, false);
703 int max_slot
= MAX2(info
->const_file_max
[0], (int) loc
) + slot_count
;
705 /* Gather buffers declared bitmasks. Note: radeonsi doesn't
706 * really use the mask (other than ubo_idx == 1 for regular
707 * uniforms) its really only used for getting the buffer count
708 * so we don't need to worry about the ordering.
710 if (variable
->interface_type
!= NULL
) {
711 if (variable
->data
.mode
== nir_var_uniform
||
712 variable
->data
.mode
== nir_var_mem_ubo
||
713 variable
->data
.mode
== nir_var_mem_ssbo
) {
715 struct set
*buf_set
= variable
->data
.mode
== nir_var_mem_ssbo
?
718 unsigned block_count
;
719 if (base_type
!= GLSL_TYPE_INTERFACE
) {
720 struct set_entry
*entry
=
721 _mesa_set_search(buf_set
, variable
->interface_type
);
723 /* Check if we have already processed
724 * a member from this ubo.
731 block_count
= aoa_size
;
734 if (variable
->data
.mode
== nir_var_uniform
||
735 variable
->data
.mode
== nir_var_mem_ubo
) {
736 info
->const_buffers_declared
|= u_bit_consecutive(ubo_idx
, block_count
);
737 ubo_idx
+= block_count
;
739 assert(variable
->data
.mode
== nir_var_mem_ssbo
);
741 info
->shader_buffers_declared
|= u_bit_consecutive(ssbo_idx
, block_count
);
742 ssbo_idx
+= block_count
;
745 _mesa_set_add(buf_set
, variable
->interface_type
);
751 /* We rely on the fact that nir_lower_samplers_as_deref has
752 * eliminated struct dereferences.
754 if (base_type
== GLSL_TYPE_SAMPLER
) {
755 if (variable
->data
.bindless
) {
756 info
->const_buffers_declared
|= 1;
757 info
->const_file_max
[0] = max_slot
;
759 info
->samplers_declared
|=
760 u_bit_consecutive(variable
->data
.binding
, aoa_size
);
762 } else if (base_type
== GLSL_TYPE_IMAGE
) {
763 if (variable
->data
.bindless
) {
764 info
->const_buffers_declared
|= 1;
765 info
->const_file_max
[0] = max_slot
;
767 info
->images_declared
|=
768 u_bit_consecutive(variable
->data
.binding
, aoa_size
);
770 } else if (base_type
!= GLSL_TYPE_ATOMIC_UINT
) {
771 info
->const_buffers_declared
|= 1;
772 info
->const_file_max
[0] = max_slot
;
776 _mesa_set_destroy(ubo_set
, NULL
);
777 _mesa_set_destroy(ssbo_set
, NULL
);
779 info
->num_written_clipdistance
= nir
->info
.clip_distance_array_size
;
780 info
->num_written_culldistance
= nir
->info
.cull_distance_array_size
;
781 info
->clipdist_writemask
= u_bit_consecutive(0, info
->num_written_clipdistance
);
782 info
->culldist_writemask
= u_bit_consecutive(0, info
->num_written_culldistance
);
784 if (info
->processor
== PIPE_SHADER_FRAGMENT
)
785 info
->uses_kill
= nir
->info
.fs
.uses_discard
;
787 func
= (struct nir_function
*)exec_list_get_head_const(&nir
->functions
);
788 nir_foreach_block(block
, func
->impl
) {
789 nir_foreach_instr(instr
, block
)
790 scan_instruction(nir
, info
, instr
);
795 si_nir_opts(struct nir_shader
*nir
)
798 unsigned lower_flrp
=
799 (nir
->options
->lower_flrp16
? 16 : 0) |
800 (nir
->options
->lower_flrp32
? 32 : 0) |
801 (nir
->options
->lower_flrp64
? 64 : 0);
806 NIR_PASS_V(nir
, nir_lower_vars_to_ssa
);
808 NIR_PASS(progress
, nir
, nir_opt_copy_prop_vars
);
809 NIR_PASS(progress
, nir
, nir_opt_dead_write_vars
);
811 NIR_PASS_V(nir
, nir_lower_alu_to_scalar
, NULL
);
812 NIR_PASS_V(nir
, nir_lower_phis_to_scalar
);
814 /* (Constant) copy propagation is needed for txf with offsets. */
815 NIR_PASS(progress
, nir
, nir_copy_prop
);
816 NIR_PASS(progress
, nir
, nir_opt_remove_phis
);
817 NIR_PASS(progress
, nir
, nir_opt_dce
);
818 if (nir_opt_trivial_continues(nir
)) {
820 NIR_PASS(progress
, nir
, nir_copy_prop
);
821 NIR_PASS(progress
, nir
, nir_opt_dce
);
823 NIR_PASS(progress
, nir
, nir_opt_if
, true);
824 NIR_PASS(progress
, nir
, nir_opt_dead_cf
);
825 NIR_PASS(progress
, nir
, nir_opt_cse
);
826 NIR_PASS(progress
, nir
, nir_opt_peephole_select
, 8, true, true);
828 /* Needed for algebraic lowering */
829 NIR_PASS(progress
, nir
, nir_opt_algebraic
);
830 NIR_PASS(progress
, nir
, nir_opt_constant_folding
);
832 if (lower_flrp
!= 0) {
833 bool lower_flrp_progress
= false;
835 NIR_PASS(lower_flrp_progress
, nir
, nir_lower_flrp
,
837 false /* always_precise */,
838 nir
->options
->lower_ffma
);
839 if (lower_flrp_progress
) {
840 NIR_PASS(progress
, nir
,
841 nir_opt_constant_folding
);
845 /* Nothing should rematerialize any flrps, so we only
846 * need to do this lowering once.
851 NIR_PASS(progress
, nir
, nir_opt_undef
);
852 NIR_PASS(progress
, nir
, nir_opt_conditional_discard
);
853 if (nir
->options
->max_unroll_iterations
) {
854 NIR_PASS(progress
, nir
, nir_opt_loop_unroll
, 0);
860 * Perform "lowering" operations on the NIR that are run once when the shader
861 * selector is created.
864 si_lower_nir(struct si_shader_selector
* sel
)
866 /* Adjust the driver location of inputs and outputs. The state tracker
867 * interprets them as slots, while the ac/nir backend interprets them
868 * as individual components.
870 nir_foreach_variable(variable
, &sel
->nir
->inputs
)
871 variable
->data
.driver_location
*= 4;
873 nir_foreach_variable(variable
, &sel
->nir
->outputs
) {
874 variable
->data
.driver_location
*= 4;
876 if (sel
->nir
->info
.stage
== MESA_SHADER_FRAGMENT
) {
877 if (variable
->data
.location
== FRAG_RESULT_DEPTH
)
878 variable
->data
.driver_location
+= 2;
879 else if (variable
->data
.location
== FRAG_RESULT_STENCIL
)
880 variable
->data
.driver_location
+= 1;
884 /* Perform lowerings (and optimizations) of code.
886 * Performance considerations aside, we must:
887 * - lower certain ALU operations
888 * - ensure constant offsets for texture instructions are folded
889 * and copy-propagated
892 static const struct nir_lower_tex_options lower_tex_options
= {
895 NIR_PASS_V(sel
->nir
, nir_lower_tex
, &lower_tex_options
);
897 const nir_lower_subgroups_options subgroups_options
= {
899 .ballot_bit_size
= 64,
900 .lower_to_scalar
= true,
901 .lower_subgroup_masks
= true,
902 .lower_vote_trivial
= false,
903 .lower_vote_eq_to_ballot
= true,
905 NIR_PASS_V(sel
->nir
, nir_lower_subgroups
, &subgroups_options
);
907 ac_lower_indirect_derefs(sel
->nir
, sel
->screen
->info
.chip_class
);
909 si_nir_opts(sel
->nir
);
911 NIR_PASS_V(sel
->nir
, nir_lower_bool_to_int32
);
913 /* Strip the resulting shader so that the shader cache is more likely
914 * to hit from other similar shaders.
919 static void declare_nir_input_vs(struct si_shader_context
*ctx
,
920 struct nir_variable
*variable
,
921 unsigned input_index
,
924 si_llvm_load_input_vs(ctx
, input_index
, out
);
927 static void declare_nir_input_fs(struct si_shader_context
*ctx
,
928 struct nir_variable
*variable
,
929 unsigned input_index
,
932 unsigned slot
= variable
->data
.location
;
933 if (slot
== VARYING_SLOT_POS
) {
934 out
[0] = LLVMGetParam(ctx
->main_fn
, SI_PARAM_POS_X_FLOAT
);
935 out
[1] = LLVMGetParam(ctx
->main_fn
, SI_PARAM_POS_Y_FLOAT
);
936 out
[2] = LLVMGetParam(ctx
->main_fn
, SI_PARAM_POS_Z_FLOAT
);
937 out
[3] = ac_build_fdiv(&ctx
->ac
, ctx
->ac
.f32_1
,
938 LLVMGetParam(ctx
->main_fn
, SI_PARAM_POS_W_FLOAT
));
942 si_llvm_load_input_fs(ctx
, input_index
, out
);
946 si_nir_lookup_interp_param(struct ac_shader_abi
*abi
,
947 enum glsl_interp_mode interp
, unsigned location
)
949 struct si_shader_context
*ctx
= si_shader_context_from_abi(abi
);
950 int interp_param_idx
= -1;
953 case INTERP_MODE_FLAT
:
955 case INTERP_MODE_SMOOTH
:
956 case INTERP_MODE_NONE
:
957 if (location
== INTERP_CENTER
)
958 interp_param_idx
= SI_PARAM_PERSP_CENTER
;
959 else if (location
== INTERP_CENTROID
)
960 interp_param_idx
= SI_PARAM_PERSP_CENTROID
;
961 else if (location
== INTERP_SAMPLE
)
962 interp_param_idx
= SI_PARAM_PERSP_SAMPLE
;
964 case INTERP_MODE_NOPERSPECTIVE
:
965 if (location
== INTERP_CENTER
)
966 interp_param_idx
= SI_PARAM_LINEAR_CENTER
;
967 else if (location
== INTERP_CENTROID
)
968 interp_param_idx
= SI_PARAM_LINEAR_CENTROID
;
969 else if (location
== INTERP_SAMPLE
)
970 interp_param_idx
= SI_PARAM_LINEAR_SAMPLE
;
973 assert(!"Unhandled interpolation mode.");
977 return interp_param_idx
!= -1 ?
978 LLVMGetParam(ctx
->main_fn
, interp_param_idx
) : NULL
;
982 si_nir_load_sampler_desc(struct ac_shader_abi
*abi
,
983 unsigned descriptor_set
, unsigned base_index
,
984 unsigned constant_index
, LLVMValueRef dynamic_index
,
985 enum ac_descriptor_type desc_type
, bool image
,
986 bool write
, bool bindless
)
988 struct si_shader_context
*ctx
= si_shader_context_from_abi(abi
);
989 LLVMBuilderRef builder
= ctx
->ac
.builder
;
990 unsigned const_index
= base_index
+ constant_index
;
991 bool dcc_off
= write
;
993 assert(!descriptor_set
);
994 assert(!image
|| desc_type
== AC_DESC_IMAGE
|| desc_type
== AC_DESC_BUFFER
);
998 LLVMGetParam(ctx
->main_fn
, ctx
->param_bindless_samplers_and_images
);
1000 /* dynamic_index is the bindless handle */
1002 /* For simplicity, bindless image descriptors use fixed
1003 * 16-dword slots for now.
1005 dynamic_index
= LLVMBuildMul(ctx
->ac
.builder
, dynamic_index
,
1006 LLVMConstInt(ctx
->i64
, 2, 0), "");
1008 return si_load_image_desc(ctx
, list
, dynamic_index
, desc_type
,
1012 /* Since bindless handle arithmetic can contain an unsigned integer
1013 * wraparound and si_load_sampler_desc assumes there isn't any,
1014 * use GEP without "inbounds" (inside ac_build_pointer_add)
1015 * to prevent incorrect code generation and hangs.
1017 dynamic_index
= LLVMBuildMul(ctx
->ac
.builder
, dynamic_index
,
1018 LLVMConstInt(ctx
->i64
, 2, 0), "");
1019 list
= ac_build_pointer_add(&ctx
->ac
, list
, dynamic_index
);
1020 return si_load_sampler_desc(ctx
, list
, ctx
->i32_0
, desc_type
);
1023 unsigned num_slots
= image
? ctx
->num_images
: ctx
->num_samplers
;
1024 assert(const_index
< num_slots
);
1026 LLVMValueRef list
= LLVMGetParam(ctx
->main_fn
, ctx
->param_samplers_and_images
);
1027 LLVMValueRef index
= LLVMConstInt(ctx
->ac
.i32
, const_index
, false);
1029 if (dynamic_index
) {
1030 index
= LLVMBuildAdd(builder
, index
, dynamic_index
, "");
1032 /* From the GL_ARB_shader_image_load_store extension spec:
1034 * If a shader performs an image load, store, or atomic
1035 * operation using an image variable declared as an array,
1036 * and if the index used to select an individual element is
1037 * negative or greater than or equal to the size of the
1038 * array, the results of the operation are undefined but may
1039 * not lead to termination.
1041 index
= si_llvm_bound_index(ctx
, index
, num_slots
);
1045 index
= LLVMBuildSub(ctx
->ac
.builder
,
1046 LLVMConstInt(ctx
->i32
, SI_NUM_IMAGES
- 1, 0),
1048 return si_load_image_desc(ctx
, list
, index
, desc_type
, dcc_off
, false);
1051 index
= LLVMBuildAdd(ctx
->ac
.builder
, index
,
1052 LLVMConstInt(ctx
->i32
, SI_NUM_IMAGES
/ 2, 0), "");
1053 return si_load_sampler_desc(ctx
, list
, index
, desc_type
);
1056 static void bitcast_inputs(struct si_shader_context
*ctx
,
1057 LLVMValueRef data
[4],
1060 for (unsigned chan
= 0; chan
< 4; chan
++) {
1061 ctx
->inputs
[input_idx
+ chan
] =
1062 LLVMBuildBitCast(ctx
->ac
.builder
, data
[chan
], ctx
->ac
.i32
, "");
1066 bool si_nir_build_llvm(struct si_shader_context
*ctx
, struct nir_shader
*nir
)
1068 struct tgsi_shader_info
*info
= &ctx
->shader
->selector
->info
;
1070 if (nir
->info
.stage
== MESA_SHADER_VERTEX
||
1071 nir
->info
.stage
== MESA_SHADER_FRAGMENT
) {
1072 uint64_t processed_inputs
= 0;
1073 nir_foreach_variable(variable
, &nir
->inputs
) {
1074 unsigned attrib_count
= glsl_count_attribute_slots(variable
->type
,
1075 nir
->info
.stage
== MESA_SHADER_VERTEX
);
1076 unsigned input_idx
= variable
->data
.driver_location
;
1078 LLVMValueRef data
[4];
1079 unsigned loc
= variable
->data
.location
;
1081 if (loc
>= VARYING_SLOT_VAR0
&& nir
->info
.stage
== MESA_SHADER_FRAGMENT
)
1082 ctx
->abi
.fs_input_attr_indices
[loc
- VARYING_SLOT_VAR0
] = input_idx
/ 4;
1084 for (unsigned i
= 0; i
< attrib_count
; i
++) {
1085 /* Packed components share the same location so skip
1086 * them if we have already processed the location.
1088 if (processed_inputs
& ((uint64_t)1 << (loc
+ i
))) {
1093 if (nir
->info
.stage
== MESA_SHADER_VERTEX
) {
1094 declare_nir_input_vs(ctx
, variable
, input_idx
/ 4, data
);
1095 bitcast_inputs(ctx
, data
, input_idx
);
1096 if (glsl_type_is_dual_slot(variable
->type
)) {
1098 declare_nir_input_vs(ctx
, variable
, input_idx
/ 4, data
);
1099 bitcast_inputs(ctx
, data
, input_idx
);
1101 } else if (nir
->info
.stage
== MESA_SHADER_FRAGMENT
) {
1102 declare_nir_input_fs(ctx
, variable
, input_idx
/ 4, data
);
1103 bitcast_inputs(ctx
, data
, input_idx
);
1106 processed_inputs
|= ((uint64_t)1 << (loc
+ i
));
1112 ctx
->abi
.inputs
= &ctx
->inputs
[0];
1113 ctx
->abi
.load_sampler_desc
= si_nir_load_sampler_desc
;
1114 ctx
->abi
.clamp_shadow_reference
= true;
1116 ctx
->num_samplers
= util_last_bit(info
->samplers_declared
);
1117 ctx
->num_images
= util_last_bit(info
->images_declared
);
1119 if (ctx
->shader
->selector
->info
.properties
[TGSI_PROPERTY_CS_LOCAL_SIZE
]) {
1120 assert(gl_shader_stage_is_compute(nir
->info
.stage
));
1121 si_declare_compute_memory(ctx
);
1123 ac_nir_translate(&ctx
->ac
, &ctx
->abi
, nir
);