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)
28 #include "glsl_to_nir.h"
29 #include "ir_visitor.h"
30 #include "ir_hierarchical_visitor.h"
32 #include "compiler/nir/nir_control_flow.h"
33 #include "compiler/nir/nir_builder.h"
34 #include "main/imports.h"
37 * pass to lower GLSL IR to NIR
39 * This will lower variable dereferences to loads/stores of corresponding
40 * variables in NIR - the variables will be converted to registers in a later
46 class nir_visitor
: public ir_visitor
49 nir_visitor(nir_shader
*shader
);
52 virtual void visit(ir_variable
*);
53 virtual void visit(ir_function
*);
54 virtual void visit(ir_function_signature
*);
55 virtual void visit(ir_loop
*);
56 virtual void visit(ir_if
*);
57 virtual void visit(ir_discard
*);
58 virtual void visit(ir_loop_jump
*);
59 virtual void visit(ir_return
*);
60 virtual void visit(ir_call
*);
61 virtual void visit(ir_assignment
*);
62 virtual void visit(ir_emit_vertex
*);
63 virtual void visit(ir_end_primitive
*);
64 virtual void visit(ir_expression
*);
65 virtual void visit(ir_swizzle
*);
66 virtual void visit(ir_texture
*);
67 virtual void visit(ir_constant
*);
68 virtual void visit(ir_dereference_variable
*);
69 virtual void visit(ir_dereference_record
*);
70 virtual void visit(ir_dereference_array
*);
71 virtual void visit(ir_barrier
*);
73 void create_function(ir_function_signature
*ir
);
76 void add_instr(nir_instr
*instr
, unsigned num_components
, unsigned bit_size
);
77 nir_ssa_def
*evaluate_rvalue(ir_rvalue
*ir
);
79 nir_alu_instr
*emit(nir_op op
, unsigned dest_size
, nir_ssa_def
**srcs
);
80 nir_alu_instr
*emit(nir_op op
, unsigned dest_size
, nir_ssa_def
*src1
);
81 nir_alu_instr
*emit(nir_op op
, unsigned dest_size
, nir_ssa_def
*src1
,
83 nir_alu_instr
*emit(nir_op op
, unsigned dest_size
, nir_ssa_def
*src1
,
84 nir_ssa_def
*src2
, nir_ssa_def
*src3
);
89 nir_function_impl
*impl
;
91 nir_ssa_def
*result
; /* result of the expression tree last visited */
93 nir_deref_var
*evaluate_deref(nir_instr
*mem_ctx
, ir_instruction
*ir
);
95 /* the head of the dereference chain we're creating */
96 nir_deref_var
*deref_head
;
97 /* the tail of the dereference chain we're creating */
98 nir_deref
*deref_tail
;
100 nir_variable
*var
; /* variable created by ir_variable visitor */
102 /* whether the IR we're operating on is per-function or global */
105 /* map of ir_variable -> nir_variable */
106 struct hash_table
*var_table
;
108 /* map of ir_function_signature -> nir_function_overload */
109 struct hash_table
*overload_table
;
113 * This visitor runs before the main visitor, calling create_function() for
114 * each function so that the main visitor can resolve forward references in
118 class nir_function_visitor
: public ir_hierarchical_visitor
121 nir_function_visitor(nir_visitor
*v
) : visitor(v
)
124 virtual ir_visitor_status
visit_enter(ir_function
*);
127 nir_visitor
*visitor
;
130 } /* end of anonymous namespace */
133 nir_remap_attributes(nir_shader
*shader
)
135 nir_foreach_variable(var
, &shader
->inputs
) {
136 var
->data
.location
+= _mesa_bitcount_64(shader
->info
->double_inputs_read
&
137 BITFIELD64_MASK(var
->data
.location
));
140 /* Once the remap is done, reset double_inputs_read, so later it will have
141 * which location/slots are doubles */
142 shader
->info
->double_inputs_read
= 0;
146 glsl_to_nir(const struct gl_shader_program
*shader_prog
,
147 gl_shader_stage stage
,
148 const nir_shader_compiler_options
*options
)
150 struct gl_linked_shader
*sh
= shader_prog
->_LinkedShaders
[stage
];
152 nir_shader
*shader
= nir_shader_create(NULL
, stage
, options
,
155 nir_visitor
v1(shader
);
156 nir_function_visitor
v2(&v1
);
158 visit_exec_list(sh
->ir
, &v1
);
160 nir_lower_constant_initializers(shader
, (nir_variable_mode
)~0);
162 /* Remap the locations to slots so those requiring two slots will occupy
163 * two locations. For instance, if we have in the IR code a dvec3 attr0 in
164 * location 0 and vec4 attr1 in location 1, in NIR attr0 will use
165 * locations/slots 0 and 1, and attr1 will use location/slot 2 */
166 if (shader
->stage
== MESA_SHADER_VERTEX
)
167 nir_remap_attributes(shader
);
169 shader
->info
->name
= ralloc_asprintf(shader
, "GLSL%d", shader_prog
->Name
);
170 if (shader_prog
->Label
)
171 shader
->info
->label
= ralloc_strdup(shader
, shader_prog
->Label
);
172 shader
->info
->clip_distance_array_size
= sh
->Program
->ClipDistanceArraySize
;
173 shader
->info
->cull_distance_array_size
= sh
->Program
->CullDistanceArraySize
;
174 shader
->info
->has_transform_feedback_varyings
=
175 shader_prog
->TransformFeedback
.NumVarying
> 0;
180 nir_visitor::nir_visitor(nir_shader
*shader
)
182 this->supports_ints
= shader
->options
->native_integers
;
183 this->shader
= shader
;
184 this->is_global
= true;
185 this->var_table
= _mesa_hash_table_create(NULL
, _mesa_hash_pointer
,
186 _mesa_key_pointer_equal
);
187 this->overload_table
= _mesa_hash_table_create(NULL
, _mesa_hash_pointer
,
188 _mesa_key_pointer_equal
);
192 this->deref_head
= NULL
;
193 this->deref_tail
= NULL
;
194 memset(&this->b
, 0, sizeof(this->b
));
197 nir_visitor::~nir_visitor()
199 _mesa_hash_table_destroy(this->var_table
, NULL
);
200 _mesa_hash_table_destroy(this->overload_table
, NULL
);
204 nir_visitor::evaluate_deref(nir_instr
*mem_ctx
, ir_instruction
*ir
)
207 ralloc_steal(mem_ctx
, this->deref_head
);
208 return this->deref_head
;
211 static nir_constant
*
212 constant_copy(ir_constant
*ir
, void *mem_ctx
)
217 nir_constant
*ret
= ralloc(mem_ctx
, nir_constant
);
219 const unsigned rows
= ir
->type
->vector_elements
;
220 const unsigned cols
= ir
->type
->matrix_columns
;
223 ret
->num_elements
= 0;
224 switch (ir
->type
->base_type
) {
226 /* Only float base types can be matrices. */
229 for (unsigned r
= 0; r
< rows
; r
++)
230 ret
->values
[0].u32
[r
] = ir
->value
.u
[r
];
235 /* Only float base types can be matrices. */
238 for (unsigned r
= 0; r
< rows
; r
++)
239 ret
->values
[0].i32
[r
] = ir
->value
.i
[r
];
243 case GLSL_TYPE_FLOAT
:
244 for (unsigned c
= 0; c
< cols
; c
++) {
245 for (unsigned r
= 0; r
< rows
; r
++)
246 ret
->values
[c
].f32
[r
] = ir
->value
.f
[c
* rows
+ r
];
250 case GLSL_TYPE_DOUBLE
:
251 for (unsigned c
= 0; c
< cols
; c
++) {
252 for (unsigned r
= 0; r
< rows
; r
++)
253 ret
->values
[c
].f64
[r
] = ir
->value
.d
[c
* rows
+ r
];
257 case GLSL_TYPE_UINT64
:
258 /* Only float base types can be matrices. */
261 for (unsigned r
= 0; r
< rows
; r
++)
262 ret
->values
[0].u64
[r
] = ir
->value
.u64
[r
];
265 case GLSL_TYPE_INT64
:
266 /* Only float base types can be matrices. */
269 for (unsigned r
= 0; r
< rows
; r
++)
270 ret
->values
[0].i64
[r
] = ir
->value
.i64
[r
];
274 /* Only float base types can be matrices. */
277 for (unsigned r
= 0; r
< rows
; r
++)
278 ret
->values
[0].u32
[r
] = ir
->value
.b
[r
] ? NIR_TRUE
: NIR_FALSE
;
282 case GLSL_TYPE_STRUCT
:
283 ret
->elements
= ralloc_array(mem_ctx
, nir_constant
*,
285 ret
->num_elements
= ir
->type
->length
;
288 foreach_in_list(ir_constant
, field
, &ir
->components
) {
289 ret
->elements
[i
] = constant_copy(field
, mem_ctx
);
294 case GLSL_TYPE_ARRAY
:
295 ret
->elements
= ralloc_array(mem_ctx
, nir_constant
*,
297 ret
->num_elements
= ir
->type
->length
;
299 for (i
= 0; i
< ir
->type
->length
; i
++)
300 ret
->elements
[i
] = constant_copy(ir
->array_elements
[i
], mem_ctx
);
304 unreachable("not reached");
311 nir_visitor::visit(ir_variable
*ir
)
313 nir_variable
*var
= ralloc(shader
, nir_variable
);
314 var
->type
= ir
->type
;
315 var
->name
= ralloc_strdup(var
, ir
->name
);
317 var
->data
.read_only
= ir
->data
.read_only
;
318 var
->data
.centroid
= ir
->data
.centroid
;
319 var
->data
.sample
= ir
->data
.sample
;
320 var
->data
.patch
= ir
->data
.patch
;
321 var
->data
.invariant
= ir
->data
.invariant
;
322 var
->data
.location
= ir
->data
.location
;
323 var
->data
.compact
= false;
325 switch(ir
->data
.mode
) {
327 case ir_var_temporary
:
329 var
->data
.mode
= nir_var_global
;
331 var
->data
.mode
= nir_var_local
;
334 case ir_var_function_in
:
335 case ir_var_function_out
:
336 case ir_var_function_inout
:
337 case ir_var_const_in
:
338 var
->data
.mode
= nir_var_local
;
341 case ir_var_shader_in
:
342 if (shader
->stage
== MESA_SHADER_FRAGMENT
&&
343 ir
->data
.location
== VARYING_SLOT_FACE
) {
344 /* For whatever reason, GLSL IR makes gl_FrontFacing an input */
345 var
->data
.location
= SYSTEM_VALUE_FRONT_FACE
;
346 var
->data
.mode
= nir_var_system_value
;
347 } else if (shader
->stage
== MESA_SHADER_GEOMETRY
&&
348 ir
->data
.location
== VARYING_SLOT_PRIMITIVE_ID
) {
349 /* For whatever reason, GLSL IR makes gl_PrimitiveIDIn an input */
350 var
->data
.location
= SYSTEM_VALUE_PRIMITIVE_ID
;
351 var
->data
.mode
= nir_var_system_value
;
353 var
->data
.mode
= nir_var_shader_in
;
355 if (shader
->stage
== MESA_SHADER_TESS_EVAL
&&
356 (ir
->data
.location
== VARYING_SLOT_TESS_LEVEL_INNER
||
357 ir
->data
.location
== VARYING_SLOT_TESS_LEVEL_OUTER
)) {
358 var
->data
.compact
= ir
->type
->without_array()->is_scalar();
362 /* Mark all the locations that require two slots */
363 if (glsl_type_is_dual_slot(glsl_without_array(var
->type
))) {
364 for (uint i
= 0; i
< glsl_count_attribute_slots(var
->type
, true); i
++) {
365 uint64_t bitfield
= BITFIELD64_BIT(var
->data
.location
+ i
);
366 shader
->info
->double_inputs_read
|= bitfield
;
371 case ir_var_shader_out
:
372 var
->data
.mode
= nir_var_shader_out
;
373 if (shader
->stage
== MESA_SHADER_TESS_CTRL
&&
374 (ir
->data
.location
== VARYING_SLOT_TESS_LEVEL_INNER
||
375 ir
->data
.location
== VARYING_SLOT_TESS_LEVEL_OUTER
)) {
376 var
->data
.compact
= ir
->type
->without_array()->is_scalar();
381 var
->data
.mode
= nir_var_uniform
;
384 case ir_var_shader_storage
:
385 var
->data
.mode
= nir_var_shader_storage
;
388 case ir_var_system_value
:
389 var
->data
.mode
= nir_var_system_value
;
393 unreachable("not reached");
396 var
->data
.interpolation
= ir
->data
.interpolation
;
397 var
->data
.origin_upper_left
= ir
->data
.origin_upper_left
;
398 var
->data
.pixel_center_integer
= ir
->data
.pixel_center_integer
;
399 var
->data
.location_frac
= ir
->data
.location_frac
;
401 switch (ir
->data
.depth_layout
) {
402 case ir_depth_layout_none
:
403 var
->data
.depth_layout
= nir_depth_layout_none
;
405 case ir_depth_layout_any
:
406 var
->data
.depth_layout
= nir_depth_layout_any
;
408 case ir_depth_layout_greater
:
409 var
->data
.depth_layout
= nir_depth_layout_greater
;
411 case ir_depth_layout_less
:
412 var
->data
.depth_layout
= nir_depth_layout_less
;
414 case ir_depth_layout_unchanged
:
415 var
->data
.depth_layout
= nir_depth_layout_unchanged
;
418 unreachable("not reached");
421 var
->data
.index
= ir
->data
.index
;
422 var
->data
.binding
= ir
->data
.binding
;
423 var
->data
.offset
= ir
->data
.offset
;
424 var
->data
.image
.read_only
= ir
->data
.image_read_only
;
425 var
->data
.image
.write_only
= ir
->data
.image_write_only
;
426 var
->data
.image
.coherent
= ir
->data
.image_coherent
;
427 var
->data
.image
._volatile
= ir
->data
.image_volatile
;
428 var
->data
.image
.restrict_flag
= ir
->data
.image_restrict
;
429 var
->data
.image
.format
= ir
->data
.image_format
;
430 var
->data
.fb_fetch_output
= ir
->data
.fb_fetch_output
;
432 var
->num_state_slots
= ir
->get_num_state_slots();
433 if (var
->num_state_slots
> 0) {
434 var
->state_slots
= ralloc_array(var
, nir_state_slot
,
435 var
->num_state_slots
);
437 ir_state_slot
*state_slots
= ir
->get_state_slots();
438 for (unsigned i
= 0; i
< var
->num_state_slots
; i
++) {
439 for (unsigned j
= 0; j
< 5; j
++)
440 var
->state_slots
[i
].tokens
[j
] = state_slots
[i
].tokens
[j
];
441 var
->state_slots
[i
].swizzle
= state_slots
[i
].swizzle
;
444 var
->state_slots
= NULL
;
447 var
->constant_initializer
= constant_copy(ir
->constant_initializer
, var
);
449 var
->interface_type
= ir
->get_interface_type();
451 if (var
->data
.mode
== nir_var_local
)
452 nir_function_impl_add_variable(impl
, var
);
454 nir_shader_add_variable(shader
, var
);
456 _mesa_hash_table_insert(var_table
, ir
, var
);
461 nir_function_visitor::visit_enter(ir_function
*ir
)
463 foreach_in_list(ir_function_signature
, sig
, &ir
->signatures
) {
464 visitor
->create_function(sig
);
466 return visit_continue_with_parent
;
470 nir_visitor::create_function(ir_function_signature
*ir
)
472 if (ir
->is_intrinsic())
475 nir_function
*func
= nir_function_create(shader
, ir
->function_name());
477 assert(ir
->parameters
.is_empty());
478 assert(ir
->return_type
== glsl_type::void_type
);
480 _mesa_hash_table_insert(this->overload_table
, ir
, func
);
484 nir_visitor::visit(ir_function
*ir
)
486 foreach_in_list(ir_function_signature
, sig
, &ir
->signatures
)
491 nir_visitor::visit(ir_function_signature
*ir
)
493 if (ir
->is_intrinsic())
496 struct hash_entry
*entry
=
497 _mesa_hash_table_search(this->overload_table
, ir
);
500 nir_function
*func
= (nir_function
*) entry
->data
;
502 if (ir
->is_defined
) {
503 nir_function_impl
*impl
= nir_function_impl_create(func
);
506 assert(strcmp(func
->name
, "main") == 0);
507 assert(ir
->parameters
.is_empty());
508 assert(func
->return_type
== glsl_type::void_type
);
510 this->is_global
= false;
512 nir_builder_init(&b
, impl
);
513 b
.cursor
= nir_after_cf_list(&impl
->body
);
514 visit_exec_list(&ir
->body
, this);
516 this->is_global
= true;
523 nir_visitor::visit(ir_loop
*ir
)
525 nir_loop
*loop
= nir_loop_create(this->shader
);
526 nir_builder_cf_insert(&b
, &loop
->cf_node
);
528 b
.cursor
= nir_after_cf_list(&loop
->body
);
529 visit_exec_list(&ir
->body_instructions
, this);
530 b
.cursor
= nir_after_cf_node(&loop
->cf_node
);
534 nir_visitor::visit(ir_if
*ir
)
537 nir_src_for_ssa(evaluate_rvalue(ir
->condition
));
539 nir_if
*if_stmt
= nir_if_create(this->shader
);
540 if_stmt
->condition
= condition
;
541 nir_builder_cf_insert(&b
, &if_stmt
->cf_node
);
543 b
.cursor
= nir_after_cf_list(&if_stmt
->then_list
);
544 visit_exec_list(&ir
->then_instructions
, this);
546 b
.cursor
= nir_after_cf_list(&if_stmt
->else_list
);
547 visit_exec_list(&ir
->else_instructions
, this);
549 b
.cursor
= nir_after_cf_node(&if_stmt
->cf_node
);
553 nir_visitor::visit(ir_discard
*ir
)
556 * discards aren't treated as control flow, because before we lower them
557 * they can appear anywhere in the shader and the stuff after them may still
558 * be executed (yay, crazy GLSL rules!). However, after lowering, all the
559 * discards will be immediately followed by a return.
562 nir_intrinsic_instr
*discard
;
564 discard
= nir_intrinsic_instr_create(this->shader
,
565 nir_intrinsic_discard_if
);
567 nir_src_for_ssa(evaluate_rvalue(ir
->condition
));
569 discard
= nir_intrinsic_instr_create(this->shader
, nir_intrinsic_discard
);
572 nir_builder_instr_insert(&b
, &discard
->instr
);
576 nir_visitor::visit(ir_emit_vertex
*ir
)
578 nir_intrinsic_instr
*instr
=
579 nir_intrinsic_instr_create(this->shader
, nir_intrinsic_emit_vertex
);
580 nir_intrinsic_set_stream_id(instr
, ir
->stream_id());
581 nir_builder_instr_insert(&b
, &instr
->instr
);
585 nir_visitor::visit(ir_end_primitive
*ir
)
587 nir_intrinsic_instr
*instr
=
588 nir_intrinsic_instr_create(this->shader
, nir_intrinsic_end_primitive
);
589 nir_intrinsic_set_stream_id(instr
, ir
->stream_id());
590 nir_builder_instr_insert(&b
, &instr
->instr
);
594 nir_visitor::visit(ir_loop_jump
*ir
)
598 case ir_loop_jump::jump_break
:
599 type
= nir_jump_break
;
601 case ir_loop_jump::jump_continue
:
602 type
= nir_jump_continue
;
605 unreachable("not reached");
608 nir_jump_instr
*instr
= nir_jump_instr_create(this->shader
, type
);
609 nir_builder_instr_insert(&b
, &instr
->instr
);
613 nir_visitor::visit(ir_return
*ir
)
615 if (ir
->value
!= NULL
) {
616 nir_intrinsic_instr
*copy
=
617 nir_intrinsic_instr_create(this->shader
, nir_intrinsic_copy_var
);
619 copy
->variables
[0] = nir_deref_var_create(copy
, this->impl
->return_var
);
620 copy
->variables
[1] = evaluate_deref(©
->instr
, ir
->value
);
623 nir_jump_instr
*instr
= nir_jump_instr_create(this->shader
, nir_jump_return
);
624 nir_builder_instr_insert(&b
, &instr
->instr
);
628 nir_visitor::visit(ir_call
*ir
)
630 if (ir
->callee
->is_intrinsic()) {
633 switch (ir
->callee
->intrinsic_id
) {
634 case ir_intrinsic_atomic_counter_read
:
635 op
= nir_intrinsic_atomic_counter_read_var
;
637 case ir_intrinsic_atomic_counter_increment
:
638 op
= nir_intrinsic_atomic_counter_inc_var
;
640 case ir_intrinsic_atomic_counter_predecrement
:
641 op
= nir_intrinsic_atomic_counter_dec_var
;
643 case ir_intrinsic_atomic_counter_add
:
644 op
= nir_intrinsic_atomic_counter_add_var
;
646 case ir_intrinsic_atomic_counter_and
:
647 op
= nir_intrinsic_atomic_counter_and_var
;
649 case ir_intrinsic_atomic_counter_or
:
650 op
= nir_intrinsic_atomic_counter_or_var
;
652 case ir_intrinsic_atomic_counter_xor
:
653 op
= nir_intrinsic_atomic_counter_xor_var
;
655 case ir_intrinsic_atomic_counter_min
:
656 op
= nir_intrinsic_atomic_counter_min_var
;
658 case ir_intrinsic_atomic_counter_max
:
659 op
= nir_intrinsic_atomic_counter_max_var
;
661 case ir_intrinsic_atomic_counter_exchange
:
662 op
= nir_intrinsic_atomic_counter_exchange_var
;
664 case ir_intrinsic_atomic_counter_comp_swap
:
665 op
= nir_intrinsic_atomic_counter_comp_swap_var
;
667 case ir_intrinsic_image_load
:
668 op
= nir_intrinsic_image_load
;
670 case ir_intrinsic_image_store
:
671 op
= nir_intrinsic_image_store
;
673 case ir_intrinsic_image_atomic_add
:
674 op
= nir_intrinsic_image_atomic_add
;
676 case ir_intrinsic_image_atomic_min
:
677 op
= nir_intrinsic_image_atomic_min
;
679 case ir_intrinsic_image_atomic_max
:
680 op
= nir_intrinsic_image_atomic_max
;
682 case ir_intrinsic_image_atomic_and
:
683 op
= nir_intrinsic_image_atomic_and
;
685 case ir_intrinsic_image_atomic_or
:
686 op
= nir_intrinsic_image_atomic_or
;
688 case ir_intrinsic_image_atomic_xor
:
689 op
= nir_intrinsic_image_atomic_xor
;
691 case ir_intrinsic_image_atomic_exchange
:
692 op
= nir_intrinsic_image_atomic_exchange
;
694 case ir_intrinsic_image_atomic_comp_swap
:
695 op
= nir_intrinsic_image_atomic_comp_swap
;
697 case ir_intrinsic_memory_barrier
:
698 op
= nir_intrinsic_memory_barrier
;
700 case ir_intrinsic_image_size
:
701 op
= nir_intrinsic_image_size
;
703 case ir_intrinsic_image_samples
:
704 op
= nir_intrinsic_image_samples
;
706 case ir_intrinsic_ssbo_store
:
707 op
= nir_intrinsic_store_ssbo
;
709 case ir_intrinsic_ssbo_load
:
710 op
= nir_intrinsic_load_ssbo
;
712 case ir_intrinsic_ssbo_atomic_add
:
713 op
= nir_intrinsic_ssbo_atomic_add
;
715 case ir_intrinsic_ssbo_atomic_and
:
716 op
= nir_intrinsic_ssbo_atomic_and
;
718 case ir_intrinsic_ssbo_atomic_or
:
719 op
= nir_intrinsic_ssbo_atomic_or
;
721 case ir_intrinsic_ssbo_atomic_xor
:
722 op
= nir_intrinsic_ssbo_atomic_xor
;
724 case ir_intrinsic_ssbo_atomic_min
:
725 assert(ir
->return_deref
);
726 if (ir
->return_deref
->type
== glsl_type::int_type
)
727 op
= nir_intrinsic_ssbo_atomic_imin
;
728 else if (ir
->return_deref
->type
== glsl_type::uint_type
)
729 op
= nir_intrinsic_ssbo_atomic_umin
;
731 unreachable("Invalid type");
733 case ir_intrinsic_ssbo_atomic_max
:
734 assert(ir
->return_deref
);
735 if (ir
->return_deref
->type
== glsl_type::int_type
)
736 op
= nir_intrinsic_ssbo_atomic_imax
;
737 else if (ir
->return_deref
->type
== glsl_type::uint_type
)
738 op
= nir_intrinsic_ssbo_atomic_umax
;
740 unreachable("Invalid type");
742 case ir_intrinsic_ssbo_atomic_exchange
:
743 op
= nir_intrinsic_ssbo_atomic_exchange
;
745 case ir_intrinsic_ssbo_atomic_comp_swap
:
746 op
= nir_intrinsic_ssbo_atomic_comp_swap
;
748 case ir_intrinsic_shader_clock
:
749 op
= nir_intrinsic_shader_clock
;
751 case ir_intrinsic_group_memory_barrier
:
752 op
= nir_intrinsic_group_memory_barrier
;
754 case ir_intrinsic_memory_barrier_atomic_counter
:
755 op
= nir_intrinsic_memory_barrier_atomic_counter
;
757 case ir_intrinsic_memory_barrier_buffer
:
758 op
= nir_intrinsic_memory_barrier_buffer
;
760 case ir_intrinsic_memory_barrier_image
:
761 op
= nir_intrinsic_memory_barrier_image
;
763 case ir_intrinsic_memory_barrier_shared
:
764 op
= nir_intrinsic_memory_barrier_shared
;
766 case ir_intrinsic_shared_load
:
767 op
= nir_intrinsic_load_shared
;
769 case ir_intrinsic_shared_store
:
770 op
= nir_intrinsic_store_shared
;
772 case ir_intrinsic_shared_atomic_add
:
773 op
= nir_intrinsic_shared_atomic_add
;
775 case ir_intrinsic_shared_atomic_and
:
776 op
= nir_intrinsic_shared_atomic_and
;
778 case ir_intrinsic_shared_atomic_or
:
779 op
= nir_intrinsic_shared_atomic_or
;
781 case ir_intrinsic_shared_atomic_xor
:
782 op
= nir_intrinsic_shared_atomic_xor
;
784 case ir_intrinsic_shared_atomic_min
:
785 assert(ir
->return_deref
);
786 if (ir
->return_deref
->type
== glsl_type::int_type
)
787 op
= nir_intrinsic_shared_atomic_imin
;
788 else if (ir
->return_deref
->type
== glsl_type::uint_type
)
789 op
= nir_intrinsic_shared_atomic_umin
;
791 unreachable("Invalid type");
793 case ir_intrinsic_shared_atomic_max
:
794 assert(ir
->return_deref
);
795 if (ir
->return_deref
->type
== glsl_type::int_type
)
796 op
= nir_intrinsic_shared_atomic_imax
;
797 else if (ir
->return_deref
->type
== glsl_type::uint_type
)
798 op
= nir_intrinsic_shared_atomic_umax
;
800 unreachable("Invalid type");
802 case ir_intrinsic_shared_atomic_exchange
:
803 op
= nir_intrinsic_shared_atomic_exchange
;
805 case ir_intrinsic_shared_atomic_comp_swap
:
806 op
= nir_intrinsic_shared_atomic_comp_swap
;
809 unreachable("not reached");
812 nir_intrinsic_instr
*instr
= nir_intrinsic_instr_create(shader
, op
);
813 nir_dest
*dest
= &instr
->dest
;
816 case nir_intrinsic_atomic_counter_read_var
:
817 case nir_intrinsic_atomic_counter_inc_var
:
818 case nir_intrinsic_atomic_counter_dec_var
:
819 case nir_intrinsic_atomic_counter_add_var
:
820 case nir_intrinsic_atomic_counter_min_var
:
821 case nir_intrinsic_atomic_counter_max_var
:
822 case nir_intrinsic_atomic_counter_and_var
:
823 case nir_intrinsic_atomic_counter_or_var
:
824 case nir_intrinsic_atomic_counter_xor_var
:
825 case nir_intrinsic_atomic_counter_exchange_var
:
826 case nir_intrinsic_atomic_counter_comp_swap_var
: {
827 /* Set the counter variable dereference. */
828 exec_node
*param
= ir
->actual_parameters
.get_head();
829 ir_dereference
*counter
= (ir_dereference
*)param
;
831 instr
->variables
[0] = evaluate_deref(&instr
->instr
, counter
);
832 param
= param
->get_next();
834 /* Set the intrinsic destination. */
835 if (ir
->return_deref
) {
836 nir_ssa_dest_init(&instr
->instr
, &instr
->dest
, 1, 32, NULL
);
839 /* Set the intrinsic parameters. */
840 if (!param
->is_tail_sentinel()) {
842 nir_src_for_ssa(evaluate_rvalue((ir_dereference
*)param
));
843 param
= param
->get_next();
846 if (!param
->is_tail_sentinel()) {
848 nir_src_for_ssa(evaluate_rvalue((ir_dereference
*)param
));
849 param
= param
->get_next();
852 nir_builder_instr_insert(&b
, &instr
->instr
);
855 case nir_intrinsic_image_load
:
856 case nir_intrinsic_image_store
:
857 case nir_intrinsic_image_atomic_add
:
858 case nir_intrinsic_image_atomic_min
:
859 case nir_intrinsic_image_atomic_max
:
860 case nir_intrinsic_image_atomic_and
:
861 case nir_intrinsic_image_atomic_or
:
862 case nir_intrinsic_image_atomic_xor
:
863 case nir_intrinsic_image_atomic_exchange
:
864 case nir_intrinsic_image_atomic_comp_swap
:
865 case nir_intrinsic_image_samples
:
866 case nir_intrinsic_image_size
: {
867 nir_ssa_undef_instr
*instr_undef
=
868 nir_ssa_undef_instr_create(shader
, 1, 32);
869 nir_builder_instr_insert(&b
, &instr_undef
->instr
);
871 /* Set the image variable dereference. */
872 exec_node
*param
= ir
->actual_parameters
.get_head();
873 ir_dereference
*image
= (ir_dereference
*)param
;
874 const glsl_type
*type
=
875 image
->variable_referenced()->type
->without_array();
877 instr
->variables
[0] = evaluate_deref(&instr
->instr
, image
);
878 param
= param
->get_next();
880 /* Set the intrinsic destination. */
881 if (ir
->return_deref
) {
882 const nir_intrinsic_info
*info
=
883 &nir_intrinsic_infos
[instr
->intrinsic
];
884 nir_ssa_dest_init(&instr
->instr
, &instr
->dest
,
885 info
->dest_components
, 32, NULL
);
888 if (op
== nir_intrinsic_image_size
||
889 op
== nir_intrinsic_image_samples
) {
890 nir_builder_instr_insert(&b
, &instr
->instr
);
894 /* Set the address argument, extending the coordinate vector to four
897 nir_ssa_def
*src_addr
=
898 evaluate_rvalue((ir_dereference
*)param
);
899 nir_ssa_def
*srcs
[4];
901 for (int i
= 0; i
< 4; i
++) {
902 if (i
< type
->coordinate_components())
903 srcs
[i
] = nir_channel(&b
, src_addr
, i
);
905 srcs
[i
] = &instr_undef
->def
;
908 instr
->src
[0] = nir_src_for_ssa(nir_vec(&b
, srcs
, 4));
909 param
= param
->get_next();
911 /* Set the sample argument, which is undefined for single-sample
914 if (type
->sampler_dimensionality
== GLSL_SAMPLER_DIM_MS
) {
916 nir_src_for_ssa(evaluate_rvalue((ir_dereference
*)param
));
917 param
= param
->get_next();
919 instr
->src
[1] = nir_src_for_ssa(&instr_undef
->def
);
922 /* Set the intrinsic parameters. */
923 if (!param
->is_tail_sentinel()) {
925 nir_src_for_ssa(evaluate_rvalue((ir_dereference
*)param
));
926 param
= param
->get_next();
929 if (!param
->is_tail_sentinel()) {
931 nir_src_for_ssa(evaluate_rvalue((ir_dereference
*)param
));
932 param
= param
->get_next();
934 nir_builder_instr_insert(&b
, &instr
->instr
);
937 case nir_intrinsic_memory_barrier
:
938 case nir_intrinsic_group_memory_barrier
:
939 case nir_intrinsic_memory_barrier_atomic_counter
:
940 case nir_intrinsic_memory_barrier_buffer
:
941 case nir_intrinsic_memory_barrier_image
:
942 case nir_intrinsic_memory_barrier_shared
:
943 nir_builder_instr_insert(&b
, &instr
->instr
);
945 case nir_intrinsic_shader_clock
:
946 nir_ssa_dest_init(&instr
->instr
, &instr
->dest
, 1, 32, NULL
);
947 nir_builder_instr_insert(&b
, &instr
->instr
);
949 case nir_intrinsic_store_ssbo
: {
950 exec_node
*param
= ir
->actual_parameters
.get_head();
951 ir_rvalue
*block
= ((ir_instruction
*)param
)->as_rvalue();
953 param
= param
->get_next();
954 ir_rvalue
*offset
= ((ir_instruction
*)param
)->as_rvalue();
956 param
= param
->get_next();
957 ir_rvalue
*val
= ((ir_instruction
*)param
)->as_rvalue();
959 param
= param
->get_next();
960 ir_constant
*write_mask
= ((ir_instruction
*)param
)->as_constant();
963 instr
->src
[0] = nir_src_for_ssa(evaluate_rvalue(val
));
964 instr
->src
[1] = nir_src_for_ssa(evaluate_rvalue(block
));
965 instr
->src
[2] = nir_src_for_ssa(evaluate_rvalue(offset
));
966 nir_intrinsic_set_write_mask(instr
, write_mask
->value
.u
[0]);
967 instr
->num_components
= val
->type
->vector_elements
;
969 nir_builder_instr_insert(&b
, &instr
->instr
);
972 case nir_intrinsic_load_ssbo
: {
973 exec_node
*param
= ir
->actual_parameters
.get_head();
974 ir_rvalue
*block
= ((ir_instruction
*)param
)->as_rvalue();
976 param
= param
->get_next();
977 ir_rvalue
*offset
= ((ir_instruction
*)param
)->as_rvalue();
979 instr
->src
[0] = nir_src_for_ssa(evaluate_rvalue(block
));
980 instr
->src
[1] = nir_src_for_ssa(evaluate_rvalue(offset
));
982 const glsl_type
*type
= ir
->return_deref
->var
->type
;
983 instr
->num_components
= type
->vector_elements
;
985 /* Setup destination register */
986 unsigned bit_size
= glsl_get_bit_size(type
);
987 nir_ssa_dest_init(&instr
->instr
, &instr
->dest
,
988 type
->vector_elements
, bit_size
, NULL
);
990 /* Insert the created nir instruction now since in the case of boolean
991 * result we will need to emit another instruction after it
993 nir_builder_instr_insert(&b
, &instr
->instr
);
996 * In SSBO/UBO's, a true boolean value is any non-zero value, but we
997 * consider a true boolean to be ~0. Fix this up with a != 0
1000 if (type
->base_type
== GLSL_TYPE_BOOL
) {
1001 nir_alu_instr
*load_ssbo_compare
=
1002 nir_alu_instr_create(shader
, nir_op_ine
);
1003 load_ssbo_compare
->src
[0].src
.is_ssa
= true;
1004 load_ssbo_compare
->src
[0].src
.ssa
= &instr
->dest
.ssa
;
1005 load_ssbo_compare
->src
[1].src
=
1006 nir_src_for_ssa(nir_imm_int(&b
, 0));
1007 for (unsigned i
= 0; i
< type
->vector_elements
; i
++)
1008 load_ssbo_compare
->src
[1].swizzle
[i
] = 0;
1009 nir_ssa_dest_init(&load_ssbo_compare
->instr
,
1010 &load_ssbo_compare
->dest
.dest
,
1011 type
->vector_elements
, bit_size
, NULL
);
1012 load_ssbo_compare
->dest
.write_mask
= (1 << type
->vector_elements
) - 1;
1013 nir_builder_instr_insert(&b
, &load_ssbo_compare
->instr
);
1014 dest
= &load_ssbo_compare
->dest
.dest
;
1018 case nir_intrinsic_ssbo_atomic_add
:
1019 case nir_intrinsic_ssbo_atomic_imin
:
1020 case nir_intrinsic_ssbo_atomic_umin
:
1021 case nir_intrinsic_ssbo_atomic_imax
:
1022 case nir_intrinsic_ssbo_atomic_umax
:
1023 case nir_intrinsic_ssbo_atomic_and
:
1024 case nir_intrinsic_ssbo_atomic_or
:
1025 case nir_intrinsic_ssbo_atomic_xor
:
1026 case nir_intrinsic_ssbo_atomic_exchange
:
1027 case nir_intrinsic_ssbo_atomic_comp_swap
: {
1028 int param_count
= ir
->actual_parameters
.length();
1029 assert(param_count
== 3 || param_count
== 4);
1032 exec_node
*param
= ir
->actual_parameters
.get_head();
1033 ir_instruction
*inst
= (ir_instruction
*) param
;
1034 instr
->src
[0] = nir_src_for_ssa(evaluate_rvalue(inst
->as_rvalue()));
1037 param
= param
->get_next();
1038 inst
= (ir_instruction
*) param
;
1039 instr
->src
[1] = nir_src_for_ssa(evaluate_rvalue(inst
->as_rvalue()));
1041 /* data1 parameter (this is always present) */
1042 param
= param
->get_next();
1043 inst
= (ir_instruction
*) param
;
1044 instr
->src
[2] = nir_src_for_ssa(evaluate_rvalue(inst
->as_rvalue()));
1046 /* data2 parameter (only with atomic_comp_swap) */
1047 if (param_count
== 4) {
1048 assert(op
== nir_intrinsic_ssbo_atomic_comp_swap
);
1049 param
= param
->get_next();
1050 inst
= (ir_instruction
*) param
;
1051 instr
->src
[3] = nir_src_for_ssa(evaluate_rvalue(inst
->as_rvalue()));
1055 assert(ir
->return_deref
);
1056 nir_ssa_dest_init(&instr
->instr
, &instr
->dest
,
1057 ir
->return_deref
->type
->vector_elements
, 32, NULL
);
1058 nir_builder_instr_insert(&b
, &instr
->instr
);
1061 case nir_intrinsic_load_shared
: {
1062 exec_node
*param
= ir
->actual_parameters
.get_head();
1063 ir_rvalue
*offset
= ((ir_instruction
*)param
)->as_rvalue();
1065 nir_intrinsic_set_base(instr
, 0);
1066 instr
->src
[0] = nir_src_for_ssa(evaluate_rvalue(offset
));
1068 const glsl_type
*type
= ir
->return_deref
->var
->type
;
1069 instr
->num_components
= type
->vector_elements
;
1071 /* Setup destination register */
1072 unsigned bit_size
= glsl_get_bit_size(type
);
1073 nir_ssa_dest_init(&instr
->instr
, &instr
->dest
,
1074 type
->vector_elements
, bit_size
, NULL
);
1076 nir_builder_instr_insert(&b
, &instr
->instr
);
1079 case nir_intrinsic_store_shared
: {
1080 exec_node
*param
= ir
->actual_parameters
.get_head();
1081 ir_rvalue
*offset
= ((ir_instruction
*)param
)->as_rvalue();
1083 param
= param
->get_next();
1084 ir_rvalue
*val
= ((ir_instruction
*)param
)->as_rvalue();
1086 param
= param
->get_next();
1087 ir_constant
*write_mask
= ((ir_instruction
*)param
)->as_constant();
1090 nir_intrinsic_set_base(instr
, 0);
1091 instr
->src
[1] = nir_src_for_ssa(evaluate_rvalue(offset
));
1093 nir_intrinsic_set_write_mask(instr
, write_mask
->value
.u
[0]);
1095 instr
->src
[0] = nir_src_for_ssa(evaluate_rvalue(val
));
1096 instr
->num_components
= val
->type
->vector_elements
;
1098 nir_builder_instr_insert(&b
, &instr
->instr
);
1101 case nir_intrinsic_shared_atomic_add
:
1102 case nir_intrinsic_shared_atomic_imin
:
1103 case nir_intrinsic_shared_atomic_umin
:
1104 case nir_intrinsic_shared_atomic_imax
:
1105 case nir_intrinsic_shared_atomic_umax
:
1106 case nir_intrinsic_shared_atomic_and
:
1107 case nir_intrinsic_shared_atomic_or
:
1108 case nir_intrinsic_shared_atomic_xor
:
1109 case nir_intrinsic_shared_atomic_exchange
:
1110 case nir_intrinsic_shared_atomic_comp_swap
: {
1111 int param_count
= ir
->actual_parameters
.length();
1112 assert(param_count
== 2 || param_count
== 3);
1115 exec_node
*param
= ir
->actual_parameters
.get_head();
1116 ir_instruction
*inst
= (ir_instruction
*) param
;
1117 instr
->src
[0] = nir_src_for_ssa(evaluate_rvalue(inst
->as_rvalue()));
1119 /* data1 parameter (this is always present) */
1120 param
= param
->get_next();
1121 inst
= (ir_instruction
*) param
;
1122 instr
->src
[1] = nir_src_for_ssa(evaluate_rvalue(inst
->as_rvalue()));
1124 /* data2 parameter (only with atomic_comp_swap) */
1125 if (param_count
== 3) {
1126 assert(op
== nir_intrinsic_shared_atomic_comp_swap
);
1127 param
= param
->get_next();
1128 inst
= (ir_instruction
*) param
;
1130 nir_src_for_ssa(evaluate_rvalue(inst
->as_rvalue()));
1134 assert(ir
->return_deref
);
1135 unsigned bit_size
= glsl_get_bit_size(ir
->return_deref
->type
);
1136 nir_ssa_dest_init(&instr
->instr
, &instr
->dest
,
1137 ir
->return_deref
->type
->vector_elements
,
1139 nir_builder_instr_insert(&b
, &instr
->instr
);
1143 unreachable("not reached");
1146 if (ir
->return_deref
) {
1147 nir_intrinsic_instr
*store_instr
=
1148 nir_intrinsic_instr_create(shader
, nir_intrinsic_store_var
);
1149 store_instr
->num_components
= ir
->return_deref
->type
->vector_elements
;
1150 nir_intrinsic_set_write_mask(store_instr
,
1151 (1 << store_instr
->num_components
) - 1);
1153 store_instr
->variables
[0] =
1154 evaluate_deref(&store_instr
->instr
, ir
->return_deref
);
1155 store_instr
->src
[0] = nir_src_for_ssa(&dest
->ssa
);
1157 nir_builder_instr_insert(&b
, &store_instr
->instr
);
1163 struct hash_entry
*entry
=
1164 _mesa_hash_table_search(this->overload_table
, ir
->callee
);
1166 nir_function
*callee
= (nir_function
*) entry
->data
;
1168 nir_call_instr
*instr
= nir_call_instr_create(this->shader
, callee
);
1171 foreach_in_list(ir_dereference
, param
, &ir
->actual_parameters
) {
1172 instr
->params
[i
] = evaluate_deref(&instr
->instr
, param
);
1176 instr
->return_deref
= evaluate_deref(&instr
->instr
, ir
->return_deref
);
1177 nir_builder_instr_insert(&b
, &instr
->instr
);
1181 nir_visitor::visit(ir_assignment
*ir
)
1183 unsigned num_components
= ir
->lhs
->type
->vector_elements
;
1185 b
.exact
= ir
->lhs
->variable_referenced()->data
.invariant
||
1186 ir
->lhs
->variable_referenced()->data
.precise
;
1188 if ((ir
->rhs
->as_dereference() || ir
->rhs
->as_constant()) &&
1189 (ir
->write_mask
== (1 << num_components
) - 1 || ir
->write_mask
== 0)) {
1190 /* We're doing a plain-as-can-be copy, so emit a copy_var */
1191 nir_intrinsic_instr
*copy
=
1192 nir_intrinsic_instr_create(this->shader
, nir_intrinsic_copy_var
);
1194 copy
->variables
[0] = evaluate_deref(©
->instr
, ir
->lhs
);
1195 copy
->variables
[1] = evaluate_deref(©
->instr
, ir
->rhs
);
1197 if (ir
->condition
) {
1198 nir_if
*if_stmt
= nir_if_create(this->shader
);
1199 if_stmt
->condition
= nir_src_for_ssa(evaluate_rvalue(ir
->condition
));
1200 nir_builder_cf_insert(&b
, &if_stmt
->cf_node
);
1201 nir_instr_insert_after_cf_list(&if_stmt
->then_list
, ©
->instr
);
1202 b
.cursor
= nir_after_cf_node(&if_stmt
->cf_node
);
1204 nir_builder_instr_insert(&b
, ©
->instr
);
1209 assert(ir
->rhs
->type
->is_scalar() || ir
->rhs
->type
->is_vector());
1211 ir
->lhs
->accept(this);
1212 nir_deref_var
*lhs_deref
= this->deref_head
;
1213 nir_ssa_def
*src
= evaluate_rvalue(ir
->rhs
);
1215 if (ir
->write_mask
!= (1 << num_components
) - 1 && ir
->write_mask
!= 0) {
1216 /* GLSL IR will give us the input to the write-masked assignment in a
1217 * single packed vector. So, for example, if the writemask is xzw, then
1218 * we have to swizzle x -> x, y -> z, and z -> w and get the y component
1222 unsigned component
= 0;
1223 for (unsigned i
= 0; i
< 4; i
++) {
1224 swiz
[i
] = ir
->write_mask
& (1 << i
) ? component
++ : 0;
1226 src
= nir_swizzle(&b
, src
, swiz
, num_components
, !supports_ints
);
1229 nir_intrinsic_instr
*store
=
1230 nir_intrinsic_instr_create(this->shader
, nir_intrinsic_store_var
);
1231 store
->num_components
= ir
->lhs
->type
->vector_elements
;
1232 nir_intrinsic_set_write_mask(store
, ir
->write_mask
);
1233 store
->variables
[0] = nir_deref_var_clone(lhs_deref
, store
);
1234 store
->src
[0] = nir_src_for_ssa(src
);
1236 if (ir
->condition
) {
1237 nir_if
*if_stmt
= nir_if_create(this->shader
);
1238 if_stmt
->condition
= nir_src_for_ssa(evaluate_rvalue(ir
->condition
));
1239 nir_builder_cf_insert(&b
, &if_stmt
->cf_node
);
1240 nir_instr_insert_after_cf_list(&if_stmt
->then_list
, &store
->instr
);
1241 b
.cursor
= nir_after_cf_node(&if_stmt
->cf_node
);
1243 nir_builder_instr_insert(&b
, &store
->instr
);
1248 * Given an instruction, returns a pointer to its destination or NULL if there
1249 * is no destination.
1251 * Note that this only handles instructions we generate at this level.
1254 get_instr_dest(nir_instr
*instr
)
1256 nir_alu_instr
*alu_instr
;
1257 nir_intrinsic_instr
*intrinsic_instr
;
1258 nir_tex_instr
*tex_instr
;
1260 switch (instr
->type
) {
1261 case nir_instr_type_alu
:
1262 alu_instr
= nir_instr_as_alu(instr
);
1263 return &alu_instr
->dest
.dest
;
1265 case nir_instr_type_intrinsic
:
1266 intrinsic_instr
= nir_instr_as_intrinsic(instr
);
1267 if (nir_intrinsic_infos
[intrinsic_instr
->intrinsic
].has_dest
)
1268 return &intrinsic_instr
->dest
;
1272 case nir_instr_type_tex
:
1273 tex_instr
= nir_instr_as_tex(instr
);
1274 return &tex_instr
->dest
;
1277 unreachable("not reached");
1284 nir_visitor::add_instr(nir_instr
*instr
, unsigned num_components
,
1287 nir_dest
*dest
= get_instr_dest(instr
);
1290 nir_ssa_dest_init(instr
, dest
, num_components
, bit_size
, NULL
);
1292 nir_builder_instr_insert(&b
, instr
);
1295 assert(dest
->is_ssa
);
1296 this->result
= &dest
->ssa
;
1301 nir_visitor::evaluate_rvalue(ir_rvalue
* ir
)
1304 if (ir
->as_dereference() || ir
->as_constant()) {
1306 * A dereference is being used on the right hand side, which means we
1307 * must emit a variable load.
1310 nir_intrinsic_instr
*load_instr
=
1311 nir_intrinsic_instr_create(this->shader
, nir_intrinsic_load_var
);
1312 load_instr
->num_components
= ir
->type
->vector_elements
;
1313 load_instr
->variables
[0] = this->deref_head
;
1314 ralloc_steal(load_instr
, load_instr
->variables
[0]);
1315 unsigned bit_size
= glsl_get_bit_size(ir
->type
);
1316 add_instr(&load_instr
->instr
, ir
->type
->vector_elements
, bit_size
);
1319 return this->result
;
1323 type_is_float(glsl_base_type type
)
1325 return type
== GLSL_TYPE_FLOAT
|| type
== GLSL_TYPE_DOUBLE
;
1329 nir_visitor::visit(ir_expression
*ir
)
1331 /* Some special cases */
1332 switch (ir
->operation
) {
1333 case ir_binop_ubo_load
: {
1334 nir_intrinsic_instr
*load
=
1335 nir_intrinsic_instr_create(this->shader
, nir_intrinsic_load_ubo
);
1336 unsigned bit_size
= glsl_get_bit_size(ir
->type
);
1337 load
->num_components
= ir
->type
->vector_elements
;
1338 load
->src
[0] = nir_src_for_ssa(evaluate_rvalue(ir
->operands
[0]));
1339 load
->src
[1] = nir_src_for_ssa(evaluate_rvalue(ir
->operands
[1]));
1340 add_instr(&load
->instr
, ir
->type
->vector_elements
, bit_size
);
1343 * In UBO's, a true boolean value is any non-zero value, but we consider
1344 * a true boolean to be ~0. Fix this up with a != 0 comparison.
1347 if (ir
->type
->base_type
== GLSL_TYPE_BOOL
)
1348 this->result
= nir_ine(&b
, &load
->dest
.ssa
, nir_imm_int(&b
, 0));
1353 case ir_unop_interpolate_at_centroid
:
1354 case ir_binop_interpolate_at_offset
:
1355 case ir_binop_interpolate_at_sample
: {
1356 ir_dereference
*deref
= ir
->operands
[0]->as_dereference();
1357 ir_swizzle
*swizzle
= NULL
;
1359 /* the api does not allow a swizzle here, but the varying packing code
1360 * may have pushed one into here.
1362 swizzle
= ir
->operands
[0]->as_swizzle();
1364 deref
= swizzle
->val
->as_dereference();
1368 deref
->accept(this);
1370 nir_intrinsic_op op
;
1371 if (this->deref_head
->var
->data
.mode
== nir_var_shader_in
) {
1372 switch (ir
->operation
) {
1373 case ir_unop_interpolate_at_centroid
:
1374 op
= nir_intrinsic_interp_var_at_centroid
;
1376 case ir_binop_interpolate_at_offset
:
1377 op
= nir_intrinsic_interp_var_at_offset
;
1379 case ir_binop_interpolate_at_sample
:
1380 op
= nir_intrinsic_interp_var_at_sample
;
1383 unreachable("Invalid interpolation intrinsic");
1386 /* This case can happen if the vertex shader does not write the
1387 * given varying. In this case, the linker will lower it to a
1388 * global variable. Since interpolating a variable makes no
1389 * sense, we'll just turn it into a load which will probably
1390 * eventually end up as an SSA definition.
1392 assert(this->deref_head
->var
->data
.mode
== nir_var_global
);
1393 op
= nir_intrinsic_load_var
;
1396 nir_intrinsic_instr
*intrin
= nir_intrinsic_instr_create(shader
, op
);
1397 intrin
->num_components
= deref
->type
->vector_elements
;
1398 intrin
->variables
[0] = this->deref_head
;
1399 ralloc_steal(intrin
, intrin
->variables
[0]);
1401 if (intrin
->intrinsic
== nir_intrinsic_interp_var_at_offset
||
1402 intrin
->intrinsic
== nir_intrinsic_interp_var_at_sample
)
1403 intrin
->src
[0] = nir_src_for_ssa(evaluate_rvalue(ir
->operands
[1]));
1405 unsigned bit_size
= glsl_get_bit_size(deref
->type
);
1406 add_instr(&intrin
->instr
, deref
->type
->vector_elements
, bit_size
);
1409 unsigned swiz
[4] = {
1410 swizzle
->mask
.x
, swizzle
->mask
.y
, swizzle
->mask
.z
, swizzle
->mask
.w
1413 result
= nir_swizzle(&b
, result
, swiz
,
1414 swizzle
->type
->vector_elements
, false);
1424 nir_ssa_def
*srcs
[4];
1425 for (unsigned i
= 0; i
< ir
->get_num_operands(); i
++)
1426 srcs
[i
] = evaluate_rvalue(ir
->operands
[i
]);
1428 glsl_base_type types
[4];
1429 for (unsigned i
= 0; i
< ir
->get_num_operands(); i
++)
1431 types
[i
] = ir
->operands
[i
]->type
->base_type
;
1433 types
[i
] = GLSL_TYPE_FLOAT
;
1435 glsl_base_type out_type
;
1437 out_type
= ir
->type
->base_type
;
1439 out_type
= GLSL_TYPE_FLOAT
;
1441 switch (ir
->operation
) {
1442 case ir_unop_bit_not
: result
= nir_inot(&b
, srcs
[0]); break;
1443 case ir_unop_logic_not
:
1444 result
= supports_ints
? nir_inot(&b
, srcs
[0]) : nir_fnot(&b
, srcs
[0]);
1447 result
= type_is_float(types
[0]) ? nir_fneg(&b
, srcs
[0])
1448 : nir_ineg(&b
, srcs
[0]);
1451 result
= type_is_float(types
[0]) ? nir_fabs(&b
, srcs
[0])
1452 : nir_iabs(&b
, srcs
[0]);
1454 case ir_unop_saturate
:
1455 assert(type_is_float(types
[0]));
1456 result
= nir_fsat(&b
, srcs
[0]);
1459 result
= type_is_float(types
[0]) ? nir_fsign(&b
, srcs
[0])
1460 : nir_isign(&b
, srcs
[0]);
1462 case ir_unop_rcp
: result
= nir_frcp(&b
, srcs
[0]); break;
1463 case ir_unop_rsq
: result
= nir_frsq(&b
, srcs
[0]); break;
1464 case ir_unop_sqrt
: result
= nir_fsqrt(&b
, srcs
[0]); break;
1465 case ir_unop_exp
: unreachable("ir_unop_exp should have been lowered");
1466 case ir_unop_log
: unreachable("ir_unop_log should have been lowered");
1467 case ir_unop_exp2
: result
= nir_fexp2(&b
, srcs
[0]); break;
1468 case ir_unop_log2
: result
= nir_flog2(&b
, srcs
[0]); break;
1470 result
= supports_ints
? nir_i2f(&b
, srcs
[0]) : nir_fmov(&b
, srcs
[0]);
1473 result
= supports_ints
? nir_u2f(&b
, srcs
[0]) : nir_fmov(&b
, srcs
[0]);
1476 result
= supports_ints
? nir_b2f(&b
, srcs
[0]) : nir_fmov(&b
, srcs
[0]);
1478 case ir_unop_f2i
: result
= nir_f2i(&b
, srcs
[0]); break;
1479 case ir_unop_f2u
: result
= nir_f2u(&b
, srcs
[0]); break;
1480 case ir_unop_f2b
: result
= nir_f2b(&b
, srcs
[0]); break;
1481 case ir_unop_i2b
: result
= nir_i2b(&b
, srcs
[0]); break;
1482 case ir_unop_b2i
: result
= nir_b2i(&b
, srcs
[0]); break;
1483 case ir_unop_d2f
: result
= nir_d2f(&b
, srcs
[0]); break;
1484 case ir_unop_f2d
: result
= nir_f2d(&b
, srcs
[0]); break;
1485 case ir_unop_d2i
: result
= nir_d2i(&b
, srcs
[0]); break;
1486 case ir_unop_d2u
: result
= nir_d2u(&b
, srcs
[0]); break;
1487 case ir_unop_d2b
: result
= nir_d2b(&b
, srcs
[0]); break;
1489 assert(supports_ints
);
1490 result
= nir_i2d(&b
, srcs
[0]);
1493 assert(supports_ints
);
1494 result
= nir_u2d(&b
, srcs
[0]);
1498 case ir_unop_bitcast_i2f
:
1499 case ir_unop_bitcast_f2i
:
1500 case ir_unop_bitcast_u2f
:
1501 case ir_unop_bitcast_f2u
:
1502 case ir_unop_subroutine_to_int
:
1504 result
= nir_imov(&b
, srcs
[0]);
1506 case ir_unop_trunc
: result
= nir_ftrunc(&b
, srcs
[0]); break;
1507 case ir_unop_ceil
: result
= nir_fceil(&b
, srcs
[0]); break;
1508 case ir_unop_floor
: result
= nir_ffloor(&b
, srcs
[0]); break;
1509 case ir_unop_fract
: result
= nir_ffract(&b
, srcs
[0]); break;
1510 case ir_unop_round_even
: result
= nir_fround_even(&b
, srcs
[0]); break;
1511 case ir_unop_sin
: result
= nir_fsin(&b
, srcs
[0]); break;
1512 case ir_unop_cos
: result
= nir_fcos(&b
, srcs
[0]); break;
1513 case ir_unop_dFdx
: result
= nir_fddx(&b
, srcs
[0]); break;
1514 case ir_unop_dFdy
: result
= nir_fddy(&b
, srcs
[0]); break;
1515 case ir_unop_dFdx_fine
: result
= nir_fddx_fine(&b
, srcs
[0]); break;
1516 case ir_unop_dFdy_fine
: result
= nir_fddy_fine(&b
, srcs
[0]); break;
1517 case ir_unop_dFdx_coarse
: result
= nir_fddx_coarse(&b
, srcs
[0]); break;
1518 case ir_unop_dFdy_coarse
: result
= nir_fddy_coarse(&b
, srcs
[0]); break;
1519 case ir_unop_pack_snorm_2x16
:
1520 result
= nir_pack_snorm_2x16(&b
, srcs
[0]);
1522 case ir_unop_pack_snorm_4x8
:
1523 result
= nir_pack_snorm_4x8(&b
, srcs
[0]);
1525 case ir_unop_pack_unorm_2x16
:
1526 result
= nir_pack_unorm_2x16(&b
, srcs
[0]);
1528 case ir_unop_pack_unorm_4x8
:
1529 result
= nir_pack_unorm_4x8(&b
, srcs
[0]);
1531 case ir_unop_pack_half_2x16
:
1532 result
= nir_pack_half_2x16(&b
, srcs
[0]);
1534 case ir_unop_unpack_snorm_2x16
:
1535 result
= nir_unpack_snorm_2x16(&b
, srcs
[0]);
1537 case ir_unop_unpack_snorm_4x8
:
1538 result
= nir_unpack_snorm_4x8(&b
, srcs
[0]);
1540 case ir_unop_unpack_unorm_2x16
:
1541 result
= nir_unpack_unorm_2x16(&b
, srcs
[0]);
1543 case ir_unop_unpack_unorm_4x8
:
1544 result
= nir_unpack_unorm_4x8(&b
, srcs
[0]);
1546 case ir_unop_unpack_half_2x16
:
1547 result
= nir_unpack_half_2x16(&b
, srcs
[0]);
1549 case ir_unop_pack_double_2x32
:
1550 result
= nir_pack_double_2x32(&b
, srcs
[0]);
1552 case ir_unop_unpack_double_2x32
:
1553 result
= nir_unpack_double_2x32(&b
, srcs
[0]);
1555 case ir_unop_bitfield_reverse
:
1556 result
= nir_bitfield_reverse(&b
, srcs
[0]);
1558 case ir_unop_bit_count
:
1559 result
= nir_bit_count(&b
, srcs
[0]);
1561 case ir_unop_find_msb
:
1563 case GLSL_TYPE_UINT
:
1564 result
= nir_ufind_msb(&b
, srcs
[0]);
1567 result
= nir_ifind_msb(&b
, srcs
[0]);
1570 unreachable("Invalid type for findMSB()");
1573 case ir_unop_find_lsb
:
1574 result
= nir_find_lsb(&b
, srcs
[0]);
1578 switch (ir
->type
->vector_elements
) {
1580 switch (ir
->operands
[0]->type
->vector_elements
) {
1581 case 1: result
= nir_fnoise1_1(&b
, srcs
[0]); break;
1582 case 2: result
= nir_fnoise1_2(&b
, srcs
[0]); break;
1583 case 3: result
= nir_fnoise1_3(&b
, srcs
[0]); break;
1584 case 4: result
= nir_fnoise1_4(&b
, srcs
[0]); break;
1585 default: unreachable("not reached");
1589 switch (ir
->operands
[0]->type
->vector_elements
) {
1590 case 1: result
= nir_fnoise2_1(&b
, srcs
[0]); break;
1591 case 2: result
= nir_fnoise2_2(&b
, srcs
[0]); break;
1592 case 3: result
= nir_fnoise2_3(&b
, srcs
[0]); break;
1593 case 4: result
= nir_fnoise2_4(&b
, srcs
[0]); break;
1594 default: unreachable("not reached");
1598 switch (ir
->operands
[0]->type
->vector_elements
) {
1599 case 1: result
= nir_fnoise3_1(&b
, srcs
[0]); break;
1600 case 2: result
= nir_fnoise3_2(&b
, srcs
[0]); break;
1601 case 3: result
= nir_fnoise3_3(&b
, srcs
[0]); break;
1602 case 4: result
= nir_fnoise3_4(&b
, srcs
[0]); break;
1603 default: unreachable("not reached");
1607 switch (ir
->operands
[0]->type
->vector_elements
) {
1608 case 1: result
= nir_fnoise4_1(&b
, srcs
[0]); break;
1609 case 2: result
= nir_fnoise4_2(&b
, srcs
[0]); break;
1610 case 3: result
= nir_fnoise4_3(&b
, srcs
[0]); break;
1611 case 4: result
= nir_fnoise4_4(&b
, srcs
[0]); break;
1612 default: unreachable("not reached");
1616 unreachable("not reached");
1619 case ir_unop_get_buffer_size
: {
1620 nir_intrinsic_instr
*load
= nir_intrinsic_instr_create(
1622 nir_intrinsic_get_buffer_size
);
1623 load
->num_components
= ir
->type
->vector_elements
;
1624 load
->src
[0] = nir_src_for_ssa(evaluate_rvalue(ir
->operands
[0]));
1625 unsigned bit_size
= glsl_get_bit_size(ir
->type
);
1626 add_instr(&load
->instr
, ir
->type
->vector_elements
, bit_size
);
1631 result
= type_is_float(out_type
) ? nir_fadd(&b
, srcs
[0], srcs
[1])
1632 : nir_iadd(&b
, srcs
[0], srcs
[1]);
1635 result
= type_is_float(out_type
) ? nir_fsub(&b
, srcs
[0], srcs
[1])
1636 : nir_isub(&b
, srcs
[0], srcs
[1]);
1639 result
= type_is_float(out_type
) ? nir_fmul(&b
, srcs
[0], srcs
[1])
1640 : nir_imul(&b
, srcs
[0], srcs
[1]);
1643 if (type_is_float(out_type
))
1644 result
= nir_fdiv(&b
, srcs
[0], srcs
[1]);
1645 else if (out_type
== GLSL_TYPE_INT
)
1646 result
= nir_idiv(&b
, srcs
[0], srcs
[1]);
1648 result
= nir_udiv(&b
, srcs
[0], srcs
[1]);
1651 result
= type_is_float(out_type
) ? nir_fmod(&b
, srcs
[0], srcs
[1])
1652 : nir_umod(&b
, srcs
[0], srcs
[1]);
1655 if (type_is_float(out_type
))
1656 result
= nir_fmin(&b
, srcs
[0], srcs
[1]);
1657 else if (out_type
== GLSL_TYPE_INT
)
1658 result
= nir_imin(&b
, srcs
[0], srcs
[1]);
1660 result
= nir_umin(&b
, srcs
[0], srcs
[1]);
1663 if (type_is_float(out_type
))
1664 result
= nir_fmax(&b
, srcs
[0], srcs
[1]);
1665 else if (out_type
== GLSL_TYPE_INT
)
1666 result
= nir_imax(&b
, srcs
[0], srcs
[1]);
1668 result
= nir_umax(&b
, srcs
[0], srcs
[1]);
1670 case ir_binop_pow
: result
= nir_fpow(&b
, srcs
[0], srcs
[1]); break;
1671 case ir_binop_bit_and
: result
= nir_iand(&b
, srcs
[0], srcs
[1]); break;
1672 case ir_binop_bit_or
: result
= nir_ior(&b
, srcs
[0], srcs
[1]); break;
1673 case ir_binop_bit_xor
: result
= nir_ixor(&b
, srcs
[0], srcs
[1]); break;
1674 case ir_binop_logic_and
:
1675 result
= supports_ints
? nir_iand(&b
, srcs
[0], srcs
[1])
1676 : nir_fand(&b
, srcs
[0], srcs
[1]);
1678 case ir_binop_logic_or
:
1679 result
= supports_ints
? nir_ior(&b
, srcs
[0], srcs
[1])
1680 : nir_for(&b
, srcs
[0], srcs
[1]);
1682 case ir_binop_logic_xor
:
1683 result
= supports_ints
? nir_ixor(&b
, srcs
[0], srcs
[1])
1684 : nir_fxor(&b
, srcs
[0], srcs
[1]);
1686 case ir_binop_lshift
: result
= nir_ishl(&b
, srcs
[0], srcs
[1]); break;
1687 case ir_binop_rshift
:
1688 result
= (out_type
== GLSL_TYPE_INT
) ? nir_ishr(&b
, srcs
[0], srcs
[1])
1689 : nir_ushr(&b
, srcs
[0], srcs
[1]);
1691 case ir_binop_imul_high
:
1692 result
= (out_type
== GLSL_TYPE_INT
) ? nir_imul_high(&b
, srcs
[0], srcs
[1])
1693 : nir_umul_high(&b
, srcs
[0], srcs
[1]);
1695 case ir_binop_carry
: result
= nir_uadd_carry(&b
, srcs
[0], srcs
[1]); break;
1696 case ir_binop_borrow
: result
= nir_usub_borrow(&b
, srcs
[0], srcs
[1]); break;
1698 if (supports_ints
) {
1699 if (type_is_float(types
[0]))
1700 result
= nir_flt(&b
, srcs
[0], srcs
[1]);
1701 else if (types
[0] == GLSL_TYPE_INT
)
1702 result
= nir_ilt(&b
, srcs
[0], srcs
[1]);
1704 result
= nir_ult(&b
, srcs
[0], srcs
[1]);
1706 result
= nir_slt(&b
, srcs
[0], srcs
[1]);
1709 case ir_binop_greater
:
1710 if (supports_ints
) {
1711 if (type_is_float(types
[0]))
1712 result
= nir_flt(&b
, srcs
[1], srcs
[0]);
1713 else if (types
[0] == GLSL_TYPE_INT
)
1714 result
= nir_ilt(&b
, srcs
[1], srcs
[0]);
1716 result
= nir_ult(&b
, srcs
[1], srcs
[0]);
1718 result
= nir_slt(&b
, srcs
[1], srcs
[0]);
1721 case ir_binop_lequal
:
1722 if (supports_ints
) {
1723 if (type_is_float(types
[0]))
1724 result
= nir_fge(&b
, srcs
[1], srcs
[0]);
1725 else if (types
[0] == GLSL_TYPE_INT
)
1726 result
= nir_ige(&b
, srcs
[1], srcs
[0]);
1728 result
= nir_uge(&b
, srcs
[1], srcs
[0]);
1730 result
= nir_slt(&b
, srcs
[1], srcs
[0]);
1733 case ir_binop_gequal
:
1734 if (supports_ints
) {
1735 if (type_is_float(types
[0]))
1736 result
= nir_fge(&b
, srcs
[0], srcs
[1]);
1737 else if (types
[0] == GLSL_TYPE_INT
)
1738 result
= nir_ige(&b
, srcs
[0], srcs
[1]);
1740 result
= nir_uge(&b
, srcs
[0], srcs
[1]);
1742 result
= nir_slt(&b
, srcs
[0], srcs
[1]);
1745 case ir_binop_equal
:
1746 if (supports_ints
) {
1747 if (type_is_float(types
[0]))
1748 result
= nir_feq(&b
, srcs
[0], srcs
[1]);
1750 result
= nir_ieq(&b
, srcs
[0], srcs
[1]);
1752 result
= nir_seq(&b
, srcs
[0], srcs
[1]);
1755 case ir_binop_nequal
:
1756 if (supports_ints
) {
1757 if (type_is_float(types
[0]))
1758 result
= nir_fne(&b
, srcs
[0], srcs
[1]);
1760 result
= nir_ine(&b
, srcs
[0], srcs
[1]);
1762 result
= nir_sne(&b
, srcs
[0], srcs
[1]);
1765 case ir_binop_all_equal
:
1766 if (supports_ints
) {
1767 if (type_is_float(types
[0])) {
1768 switch (ir
->operands
[0]->type
->vector_elements
) {
1769 case 1: result
= nir_feq(&b
, srcs
[0], srcs
[1]); break;
1770 case 2: result
= nir_ball_fequal2(&b
, srcs
[0], srcs
[1]); break;
1771 case 3: result
= nir_ball_fequal3(&b
, srcs
[0], srcs
[1]); break;
1772 case 4: result
= nir_ball_fequal4(&b
, srcs
[0], srcs
[1]); break;
1774 unreachable("not reached");
1777 switch (ir
->operands
[0]->type
->vector_elements
) {
1778 case 1: result
= nir_ieq(&b
, srcs
[0], srcs
[1]); break;
1779 case 2: result
= nir_ball_iequal2(&b
, srcs
[0], srcs
[1]); break;
1780 case 3: result
= nir_ball_iequal3(&b
, srcs
[0], srcs
[1]); break;
1781 case 4: result
= nir_ball_iequal4(&b
, srcs
[0], srcs
[1]); break;
1783 unreachable("not reached");
1787 switch (ir
->operands
[0]->type
->vector_elements
) {
1788 case 1: result
= nir_seq(&b
, srcs
[0], srcs
[1]); break;
1789 case 2: result
= nir_fall_equal2(&b
, srcs
[0], srcs
[1]); break;
1790 case 3: result
= nir_fall_equal3(&b
, srcs
[0], srcs
[1]); break;
1791 case 4: result
= nir_fall_equal4(&b
, srcs
[0], srcs
[1]); break;
1793 unreachable("not reached");
1797 case ir_binop_any_nequal
:
1798 if (supports_ints
) {
1799 if (type_is_float(types
[0])) {
1800 switch (ir
->operands
[0]->type
->vector_elements
) {
1801 case 1: result
= nir_fne(&b
, srcs
[0], srcs
[1]); break;
1802 case 2: result
= nir_bany_fnequal2(&b
, srcs
[0], srcs
[1]); break;
1803 case 3: result
= nir_bany_fnequal3(&b
, srcs
[0], srcs
[1]); break;
1804 case 4: result
= nir_bany_fnequal4(&b
, srcs
[0], srcs
[1]); break;
1806 unreachable("not reached");
1809 switch (ir
->operands
[0]->type
->vector_elements
) {
1810 case 1: result
= nir_ine(&b
, srcs
[0], srcs
[1]); break;
1811 case 2: result
= nir_bany_inequal2(&b
, srcs
[0], srcs
[1]); break;
1812 case 3: result
= nir_bany_inequal3(&b
, srcs
[0], srcs
[1]); break;
1813 case 4: result
= nir_bany_inequal4(&b
, srcs
[0], srcs
[1]); break;
1815 unreachable("not reached");
1819 switch (ir
->operands
[0]->type
->vector_elements
) {
1820 case 1: result
= nir_sne(&b
, srcs
[0], srcs
[1]); break;
1821 case 2: result
= nir_fany_nequal2(&b
, srcs
[0], srcs
[1]); break;
1822 case 3: result
= nir_fany_nequal3(&b
, srcs
[0], srcs
[1]); break;
1823 case 4: result
= nir_fany_nequal4(&b
, srcs
[0], srcs
[1]); break;
1825 unreachable("not reached");
1830 switch (ir
->operands
[0]->type
->vector_elements
) {
1831 case 2: result
= nir_fdot2(&b
, srcs
[0], srcs
[1]); break;
1832 case 3: result
= nir_fdot3(&b
, srcs
[0], srcs
[1]); break;
1833 case 4: result
= nir_fdot4(&b
, srcs
[0], srcs
[1]); break;
1835 unreachable("not reached");
1839 case ir_binop_ldexp
: result
= nir_ldexp(&b
, srcs
[0], srcs
[1]); break;
1841 result
= nir_ffma(&b
, srcs
[0], srcs
[1], srcs
[2]);
1844 result
= nir_flrp(&b
, srcs
[0], srcs
[1], srcs
[2]);
1848 result
= nir_bcsel(&b
, srcs
[0], srcs
[1], srcs
[2]);
1850 result
= nir_fcsel(&b
, srcs
[0], srcs
[1], srcs
[2]);
1852 case ir_triop_bitfield_extract
:
1853 result
= (out_type
== GLSL_TYPE_INT
) ?
1854 nir_ibitfield_extract(&b
, srcs
[0], srcs
[1], srcs
[2]) :
1855 nir_ubitfield_extract(&b
, srcs
[0], srcs
[1], srcs
[2]);
1857 case ir_quadop_bitfield_insert
:
1858 result
= nir_bitfield_insert(&b
, srcs
[0], srcs
[1], srcs
[2], srcs
[3]);
1860 case ir_quadop_vector
:
1861 result
= nir_vec(&b
, srcs
, ir
->type
->vector_elements
);
1865 unreachable("not reached");
1870 nir_visitor::visit(ir_swizzle
*ir
)
1872 unsigned swizzle
[4] = { ir
->mask
.x
, ir
->mask
.y
, ir
->mask
.z
, ir
->mask
.w
};
1873 result
= nir_swizzle(&b
, evaluate_rvalue(ir
->val
), swizzle
,
1874 ir
->type
->vector_elements
, !supports_ints
);
1878 nir_visitor::visit(ir_texture
*ir
)
1885 num_srcs
= 1; /* coordinate */
1890 op
= (ir
->op
== ir_txb
) ? nir_texop_txb
: nir_texop_txl
;
1891 num_srcs
= 2; /* coordinate, bias/lod */
1895 op
= nir_texop_txd
; /* coordinate, dPdx, dPdy */
1901 if (ir
->lod_info
.lod
!= NULL
)
1902 num_srcs
= 2; /* coordinate, lod */
1904 num_srcs
= 1; /* coordinate */
1908 op
= nir_texop_txf_ms
;
1909 num_srcs
= 2; /* coordinate, sample_index */
1914 if (ir
->lod_info
.lod
!= NULL
)
1915 num_srcs
= 1; /* lod */
1922 num_srcs
= 1; /* coordinate */
1927 num_srcs
= 1; /* coordinate */
1930 case ir_query_levels
:
1931 op
= nir_texop_query_levels
;
1935 case ir_texture_samples
:
1936 op
= nir_texop_texture_samples
;
1940 case ir_samples_identical
:
1941 op
= nir_texop_samples_identical
;
1942 num_srcs
= 1; /* coordinate */
1946 unreachable("not reached");
1949 if (ir
->projector
!= NULL
)
1951 if (ir
->shadow_comparator
!= NULL
)
1953 if (ir
->offset
!= NULL
)
1956 nir_tex_instr
*instr
= nir_tex_instr_create(this->shader
, num_srcs
);
1959 instr
->sampler_dim
=
1960 (glsl_sampler_dim
) ir
->sampler
->type
->sampler_dimensionality
;
1961 instr
->is_array
= ir
->sampler
->type
->sampler_array
;
1962 instr
->is_shadow
= ir
->sampler
->type
->sampler_shadow
;
1963 if (instr
->is_shadow
)
1964 instr
->is_new_style_shadow
= (ir
->type
->vector_elements
== 1);
1965 switch (ir
->type
->base_type
) {
1966 case GLSL_TYPE_FLOAT
:
1967 instr
->dest_type
= nir_type_float
;
1970 instr
->dest_type
= nir_type_int
;
1972 case GLSL_TYPE_BOOL
:
1973 case GLSL_TYPE_UINT
:
1974 instr
->dest_type
= nir_type_uint
;
1977 unreachable("not reached");
1980 instr
->texture
= evaluate_deref(&instr
->instr
, ir
->sampler
);
1982 unsigned src_number
= 0;
1984 if (ir
->coordinate
!= NULL
) {
1985 instr
->coord_components
= ir
->coordinate
->type
->vector_elements
;
1986 instr
->src
[src_number
].src
=
1987 nir_src_for_ssa(evaluate_rvalue(ir
->coordinate
));
1988 instr
->src
[src_number
].src_type
= nir_tex_src_coord
;
1992 if (ir
->projector
!= NULL
) {
1993 instr
->src
[src_number
].src
=
1994 nir_src_for_ssa(evaluate_rvalue(ir
->projector
));
1995 instr
->src
[src_number
].src_type
= nir_tex_src_projector
;
1999 if (ir
->shadow_comparator
!= NULL
) {
2000 instr
->src
[src_number
].src
=
2001 nir_src_for_ssa(evaluate_rvalue(ir
->shadow_comparator
));
2002 instr
->src
[src_number
].src_type
= nir_tex_src_comparator
;
2006 if (ir
->offset
!= NULL
) {
2007 /* we don't support multiple offsets yet */
2008 assert(ir
->offset
->type
->is_vector() || ir
->offset
->type
->is_scalar());
2010 instr
->src
[src_number
].src
=
2011 nir_src_for_ssa(evaluate_rvalue(ir
->offset
));
2012 instr
->src
[src_number
].src_type
= nir_tex_src_offset
;
2018 instr
->src
[src_number
].src
=
2019 nir_src_for_ssa(evaluate_rvalue(ir
->lod_info
.bias
));
2020 instr
->src
[src_number
].src_type
= nir_tex_src_bias
;
2027 if (ir
->lod_info
.lod
!= NULL
) {
2028 instr
->src
[src_number
].src
=
2029 nir_src_for_ssa(evaluate_rvalue(ir
->lod_info
.lod
));
2030 instr
->src
[src_number
].src_type
= nir_tex_src_lod
;
2036 instr
->src
[src_number
].src
=
2037 nir_src_for_ssa(evaluate_rvalue(ir
->lod_info
.grad
.dPdx
));
2038 instr
->src
[src_number
].src_type
= nir_tex_src_ddx
;
2040 instr
->src
[src_number
].src
=
2041 nir_src_for_ssa(evaluate_rvalue(ir
->lod_info
.grad
.dPdy
));
2042 instr
->src
[src_number
].src_type
= nir_tex_src_ddy
;
2047 instr
->src
[src_number
].src
=
2048 nir_src_for_ssa(evaluate_rvalue(ir
->lod_info
.sample_index
));
2049 instr
->src
[src_number
].src_type
= nir_tex_src_ms_index
;
2054 instr
->component
= ir
->lod_info
.component
->as_constant()->value
.u
[0];
2061 assert(src_number
== num_srcs
);
2063 unsigned bit_size
= glsl_get_bit_size(ir
->type
);
2064 add_instr(&instr
->instr
, nir_tex_instr_dest_size(instr
), bit_size
);
2068 nir_visitor::visit(ir_constant
*ir
)
2071 * We don't know if this variable is an array or struct that gets
2072 * dereferenced, so do the safe thing an make it a variable with a
2073 * constant initializer and return a dereference.
2077 nir_local_variable_create(this->impl
, ir
->type
, "const_temp");
2078 var
->data
.read_only
= true;
2079 var
->constant_initializer
= constant_copy(ir
, var
);
2081 this->deref_head
= nir_deref_var_create(this->shader
, var
);
2082 this->deref_tail
= &this->deref_head
->deref
;
2086 nir_visitor::visit(ir_dereference_variable
*ir
)
2088 struct hash_entry
*entry
=
2089 _mesa_hash_table_search(this->var_table
, ir
->var
);
2091 nir_variable
*var
= (nir_variable
*) entry
->data
;
2093 nir_deref_var
*deref
= nir_deref_var_create(this->shader
, var
);
2094 this->deref_head
= deref
;
2095 this->deref_tail
= &deref
->deref
;
2099 nir_visitor::visit(ir_dereference_record
*ir
)
2101 ir
->record
->accept(this);
2103 int field_index
= this->deref_tail
->type
->field_index(ir
->field
);
2104 assert(field_index
>= 0);
2106 nir_deref_struct
*deref
= nir_deref_struct_create(this->deref_tail
, field_index
);
2107 deref
->deref
.type
= ir
->type
;
2108 this->deref_tail
->child
= &deref
->deref
;
2109 this->deref_tail
= &deref
->deref
;
2113 nir_visitor::visit(ir_dereference_array
*ir
)
2115 nir_deref_array
*deref
= nir_deref_array_create(this->shader
);
2116 deref
->deref
.type
= ir
->type
;
2118 ir_constant
*const_index
= ir
->array_index
->as_constant();
2119 if (const_index
!= NULL
) {
2120 deref
->deref_array_type
= nir_deref_array_type_direct
;
2121 deref
->base_offset
= const_index
->value
.u
[0];
2123 deref
->deref_array_type
= nir_deref_array_type_indirect
;
2125 nir_src_for_ssa(evaluate_rvalue(ir
->array_index
));
2128 ir
->array
->accept(this);
2130 this->deref_tail
->child
= &deref
->deref
;
2131 ralloc_steal(this->deref_tail
, deref
);
2132 this->deref_tail
= &deref
->deref
;
2136 nir_visitor::visit(ir_barrier
*)
2138 nir_intrinsic_instr
*instr
=
2139 nir_intrinsic_instr_create(this->shader
, nir_intrinsic_barrier
);
2140 nir_builder_instr_insert(&b
, &instr
->instr
);