2 * Copyright © 2011 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
28 #include "brw_shader.h"
29 #include "main/compiler.h"
30 #include "program/hash_table.h"
31 #include "brw_program.h"
34 #include "brw_ir_vec4.h"
39 #include "brw_context.h"
41 #include "intel_asm_annotation.h"
48 #include "glsl/nir/nir.h"
60 class vec4_live_variables
;
63 * The vertex shader front-end.
65 * Translates either GLSL IR or Mesa IR (for ARB_vertex_program and
66 * fixed-function) into VS IR.
68 class vec4_visitor
: public backend_shader
, public ir_visitor
71 vec4_visitor(const struct brw_compiler
*compiler
,
73 struct gl_program
*prog
,
74 const struct brw_sampler_prog_key_data
*key
,
75 struct brw_vue_prog_data
*prog_data
,
76 struct gl_shader_program
*shader_prog
,
77 gl_shader_stage stage
,
80 int shader_time_index
);
85 return dst_reg(brw_null_reg());
90 return dst_reg(retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
95 return dst_reg(retype(brw_null_reg(), BRW_REGISTER_TYPE_UD
));
98 const struct brw_sampler_prog_key_data
* const key_tex
;
99 struct brw_vue_prog_data
* const prog_data
;
100 unsigned int sanity_param_count
;
106 * GLSL IR currently being processed, which is associated with our
107 * driver IR instructions for debugging purposes.
110 const char *current_annotation
;
112 int first_non_payload_grf
;
113 unsigned int max_grf
;
114 int *virtual_grf_start
;
115 int *virtual_grf_end
;
116 brw::vec4_live_variables
*live_intervals
;
117 dst_reg userplane
[MAX_CLIP_PLANES
];
119 dst_reg
*variable_storage(ir_variable
*var
);
121 void reladdr_to_temp(ir_instruction
*ir
, src_reg
*reg
, int *num_reladdr
);
123 bool need_all_constants_in_pull_buffer
;
126 * \name Visit methods
128 * As typical for the visitor pattern, there must be one \c visit method for
129 * each concrete subclass of \c ir_instruction. Virtual base classes within
130 * the hierarchy should not have \c visit methods.
133 virtual void visit(ir_variable
*);
134 virtual void visit(ir_loop
*);
135 virtual void visit(ir_loop_jump
*);
136 virtual void visit(ir_function_signature
*);
137 virtual void visit(ir_function
*);
138 virtual void visit(ir_expression
*);
139 virtual void visit(ir_swizzle
*);
140 virtual void visit(ir_dereference_variable
*);
141 virtual void visit(ir_dereference_array
*);
142 virtual void visit(ir_dereference_record
*);
143 virtual void visit(ir_assignment
*);
144 virtual void visit(ir_constant
*);
145 virtual void visit(ir_call
*);
146 virtual void visit(ir_return
*);
147 virtual void visit(ir_discard
*);
148 virtual void visit(ir_texture
*);
149 virtual void visit(ir_if
*);
150 virtual void visit(ir_emit_vertex
*);
151 virtual void visit(ir_end_primitive
*);
152 virtual void visit(ir_barrier
*);
157 /* Regs for vertex results. Generated at ir_variable visiting time
158 * for the ir->location's used.
160 dst_reg output_reg
[BRW_VARYING_SLOT_COUNT
];
161 const char *output_reg_annotation
[BRW_VARYING_SLOT_COUNT
];
163 int *uniform_vector_size
;
164 int uniform_array_size
; /*< Size of uniform_[vector_]size arrays */
167 src_reg shader_start_time
;
169 struct hash_table
*variable_ht
;
172 void fail(const char *msg
, ...);
174 virtual void setup_vec4_uniform_value(unsigned param_offset
,
175 const gl_constant_value
*values
,
177 void setup_uniform_values(ir_variable
*ir
);
178 void setup_builtin_uniform_values(ir_variable
*ir
);
179 int setup_uniforms(int payload_reg
);
181 bool reg_allocate_trivial();
183 void evaluate_spill_costs(float *spill_costs
, bool *no_spill
);
184 int choose_spill_reg(struct ra_graph
*g
);
185 void spill_reg(int spill_reg
);
186 void move_grf_array_access_to_scratch();
187 void move_uniform_array_access_to_pull_constants();
188 void move_push_constants_to_pull_constants();
189 void split_uniform_registers();
190 void pack_uniform_registers();
191 void calculate_live_intervals();
192 void invalidate_live_intervals();
193 void split_virtual_grfs();
194 bool opt_vector_float();
195 bool opt_reduce_swizzle();
196 bool dead_code_eliminate();
197 int var_range_start(unsigned v
, unsigned n
) const;
198 int var_range_end(unsigned v
, unsigned n
) const;
199 bool virtual_grf_interferes(int a
, int b
);
200 bool opt_copy_propagation(bool do_constant_prop
= true);
201 bool opt_cse_local(bblock_t
*block
);
203 bool opt_algebraic();
204 bool opt_register_coalesce();
205 bool eliminate_find_live_channel();
206 bool is_dep_ctrl_unsafe(const vec4_instruction
*inst
);
207 void opt_set_dependency_control();
208 void opt_schedule_instructions();
210 vec4_instruction
*emit(vec4_instruction
*inst
);
212 vec4_instruction
*emit(enum opcode opcode
);
213 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
);
214 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
215 const src_reg
&src0
);
216 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
217 const src_reg
&src0
, const src_reg
&src1
);
218 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
219 const src_reg
&src0
, const src_reg
&src1
,
220 const src_reg
&src2
);
222 vec4_instruction
*emit_before(bblock_t
*block
,
223 vec4_instruction
*inst
,
224 vec4_instruction
*new_inst
);
226 #define EMIT1(op) vec4_instruction *op(const dst_reg &, const src_reg &);
227 #define EMIT2(op) vec4_instruction *op(const dst_reg &, const src_reg &, const src_reg &);
228 #define EMIT3(op) vec4_instruction *op(const dst_reg &, const src_reg &, const src_reg &, const src_reg &);
250 vec4_instruction
*CMP(dst_reg dst
, src_reg src0
, src_reg src1
,
251 enum brw_conditional_mod condition
);
252 vec4_instruction
*IF(src_reg src0
, src_reg src1
,
253 enum brw_conditional_mod condition
);
254 vec4_instruction
*IF(enum brw_predicate predicate
);
272 int implied_mrf_writes(vec4_instruction
*inst
);
274 bool try_rewrite_rhs_to_dst(ir_assignment
*ir
,
277 vec4_instruction
*pre_rhs_inst
,
278 vec4_instruction
*last_rhs_inst
);
280 /** Walks an exec_list of ir_instruction and sends it through this visitor. */
281 void visit_instructions(const exec_list
*list
);
283 void emit_vp_sop(enum brw_conditional_mod condmod
, dst_reg dst
,
284 src_reg src0
, src_reg src1
, src_reg one
);
286 void emit_bool_to_cond_code(ir_rvalue
*ir
, enum brw_predicate
*predicate
);
287 void emit_if_gen6(ir_if
*ir
);
289 vec4_instruction
*emit_minmax(enum brw_conditional_mod conditionalmod
, dst_reg dst
,
290 src_reg src0
, src_reg src1
);
292 vec4_instruction
*emit_lrp(const dst_reg
&dst
, const src_reg
&x
,
293 const src_reg
&y
, const src_reg
&a
);
296 * Copy any live channel from \p src to the first channel of the
299 src_reg
emit_uniformize(const src_reg
&src
);
301 void emit_block_move(dst_reg
*dst
, src_reg
*src
,
302 const struct glsl_type
*type
, brw_predicate predicate
);
304 void emit_constant_values(dst_reg
*dst
, ir_constant
*value
);
307 * Emit the correct dot-product instruction for the type of arguments
309 void emit_dp(dst_reg dst
, src_reg src0
, src_reg src1
, unsigned elements
);
311 void emit_scalar(ir_instruction
*ir
, enum prog_opcode op
,
312 dst_reg dst
, src_reg src0
);
314 void emit_scalar(ir_instruction
*ir
, enum prog_opcode op
,
315 dst_reg dst
, src_reg src0
, src_reg src1
);
317 src_reg
fix_3src_operand(const src_reg
&src
);
318 src_reg
resolve_source_modifiers(const src_reg
&src
);
320 vec4_instruction
*emit_math(enum opcode opcode
, const dst_reg
&dst
, const src_reg
&src0
,
321 const src_reg
&src1
= src_reg());
323 src_reg
fix_math_operand(const src_reg
&src
);
325 void emit_pack_half_2x16(dst_reg dst
, src_reg src0
);
326 void emit_unpack_half_2x16(dst_reg dst
, src_reg src0
);
327 void emit_unpack_unorm_4x8(const dst_reg
&dst
, src_reg src0
);
328 void emit_unpack_snorm_4x8(const dst_reg
&dst
, src_reg src0
);
329 void emit_pack_unorm_4x8(const dst_reg
&dst
, const src_reg
&src0
);
330 void emit_pack_snorm_4x8(const dst_reg
&dst
, const src_reg
&src0
);
332 void emit_texture(ir_texture_opcode op
,
334 const glsl_type
*dest_type
,
336 int coord_components
,
337 src_reg shadow_comparitor
,
338 src_reg lod
, src_reg lod2
,
339 src_reg sample_index
,
340 uint32_t constant_offset
,
341 src_reg offset_value
,
344 uint32_t sampler
, src_reg sampler_reg
);
346 uint32_t gather_channel(unsigned gather_component
, uint32_t sampler
);
347 src_reg
emit_mcs_fetch(const glsl_type
*coordinate_type
, src_reg coordinate
,
349 void emit_gen6_gather_wa(uint8_t wa
, dst_reg dst
);
350 void swizzle_result(ir_texture_opcode op
, dst_reg dest
,
351 src_reg orig_val
, uint32_t sampler
,
352 const glsl_type
*dest_type
);
354 void emit_ndc_computation();
355 void emit_psiz_and_flags(dst_reg reg
);
356 vec4_instruction
*emit_generic_urb_slot(dst_reg reg
, int varying
);
357 virtual void emit_urb_slot(dst_reg reg
, int varying
);
359 void emit_shader_time_begin();
360 void emit_shader_time_end();
361 void emit_shader_time_write(int shader_time_subindex
, src_reg value
);
363 void emit_untyped_atomic(unsigned atomic_op
, unsigned surf_index
,
364 dst_reg dst
, src_reg offset
, src_reg src0
,
367 void emit_untyped_surface_read(unsigned surf_index
, dst_reg dst
,
370 src_reg
get_scratch_offset(bblock_t
*block
, vec4_instruction
*inst
,
371 src_reg
*reladdr
, int reg_offset
);
372 src_reg
get_pull_constant_offset(bblock_t
*block
, vec4_instruction
*inst
,
373 src_reg
*reladdr
, int reg_offset
);
374 void emit_scratch_read(bblock_t
*block
, vec4_instruction
*inst
,
378 void emit_scratch_write(bblock_t
*block
, vec4_instruction
*inst
,
380 void emit_pull_constant_load(bblock_t
*block
, vec4_instruction
*inst
,
384 void emit_pull_constant_load_reg(dst_reg dst
,
387 bblock_t
*before_block
,
388 vec4_instruction
*before_inst
);
389 src_reg
emit_resolve_reladdr(int scratch_loc
[], bblock_t
*block
,
390 vec4_instruction
*inst
, src_reg src
);
392 bool try_emit_mad(ir_expression
*ir
);
393 bool try_emit_b2f_of_compare(ir_expression
*ir
);
394 void resolve_ud_negate(src_reg
*reg
);
395 void resolve_bool_comparison(ir_rvalue
*rvalue
, src_reg
*reg
);
397 src_reg
get_timestamp();
399 bool process_move_condition(ir_rvalue
*ir
);
401 void dump_instruction(backend_instruction
*inst
);
402 void dump_instruction(backend_instruction
*inst
, FILE *file
);
404 void visit_atomic_counter_intrinsic(ir_call
*ir
);
406 bool is_high_sampler(src_reg sampler
);
408 virtual void emit_nir_code();
409 virtual void nir_setup_inputs(nir_shader
*shader
);
410 virtual void nir_setup_uniforms(nir_shader
*shader
);
411 virtual void nir_setup_uniform(nir_variable
*var
);
412 virtual void nir_setup_builtin_uniform(nir_variable
*var
);
413 virtual void nir_setup_system_value_intrinsic(nir_intrinsic_instr
*instr
);
414 virtual void nir_setup_system_values(nir_shader
*shader
);
415 virtual void nir_emit_impl(nir_function_impl
*impl
);
416 virtual void nir_emit_cf_list(exec_list
*list
);
417 virtual void nir_emit_if(nir_if
*if_stmt
);
418 virtual void nir_emit_loop(nir_loop
*loop
);
419 virtual void nir_emit_block(nir_block
*block
);
420 virtual void nir_emit_instr(nir_instr
*instr
);
421 virtual void nir_emit_load_const(nir_load_const_instr
*instr
);
422 virtual void nir_emit_intrinsic(nir_intrinsic_instr
*instr
);
423 virtual void nir_emit_alu(nir_alu_instr
*instr
);
424 virtual void nir_emit_jump(nir_jump_instr
*instr
);
425 virtual void nir_emit_texture(nir_tex_instr
*instr
);
426 virtual void nir_emit_undef(nir_ssa_undef_instr
*instr
);
428 dst_reg
get_nir_dest(nir_dest dest
, enum brw_reg_type type
);
429 dst_reg
get_nir_dest(nir_dest dest
, nir_alu_type type
);
430 dst_reg
get_nir_dest(nir_dest dest
);
431 src_reg
get_nir_src(nir_src src
, enum brw_reg_type type
,
432 unsigned num_components
= 4);
433 src_reg
get_nir_src(nir_src src
, nir_alu_type type
,
434 unsigned num_components
= 4);
435 src_reg
get_nir_src(nir_src src
,
436 unsigned num_components
= 4);
438 virtual dst_reg
*make_reg_for_system_value(int location
,
439 const glsl_type
*type
) = 0;
442 dst_reg
*nir_ssa_values
;
444 dst_reg
*nir_system_values
;
448 void lower_attributes_to_hw_regs(const int *attribute_map
,
450 void setup_payload_interference(struct ra_graph
*g
, int first_payload_node
,
452 virtual void assign_binding_table_offsets();
453 virtual void setup_payload() = 0;
454 virtual void emit_prolog() = 0;
455 virtual void emit_program_code() = 0;
456 virtual void emit_thread_end() = 0;
457 virtual void emit_urb_write_header(int mrf
) = 0;
458 virtual vec4_instruction
*emit_urb_write_opcode(bool complete
) = 0;
459 virtual int compute_array_stride(ir_dereference_array
*ir
);
460 virtual void gs_emit_vertex(int stream_id
);
461 virtual void gs_end_primitive();
465 * If true, then register allocation should fail instead of spilling.
467 const bool no_spills
;
469 int shader_time_index
;
471 unsigned last_scratch
; /**< measured in 32-byte (register size) units */
476 * The vertex shader code generator.
478 * Translates VS IR to actual i965 assembly code.
483 vec4_generator(const struct brw_compiler
*compiler
, void *log_data
,
484 struct gl_shader_program
*shader_prog
,
485 struct gl_program
*prog
,
486 struct brw_vue_prog_data
*prog_data
,
489 const char *stage_name
,
490 const char *stage_abbrev
);
493 const unsigned *generate_assembly(const cfg_t
*cfg
, unsigned *asm_size
);
496 void generate_code(const cfg_t
*cfg
);
498 void generate_math1_gen4(vec4_instruction
*inst
,
501 void generate_math2_gen4(vec4_instruction
*inst
,
504 struct brw_reg src1
);
505 void generate_math_gen6(vec4_instruction
*inst
,
508 struct brw_reg src1
);
510 void generate_tex(vec4_instruction
*inst
,
513 struct brw_reg sampler_index
);
515 void generate_vs_urb_write(vec4_instruction
*inst
);
516 void generate_gs_urb_write(vec4_instruction
*inst
);
517 void generate_gs_urb_write_allocate(vec4_instruction
*inst
);
518 void generate_gs_thread_end(vec4_instruction
*inst
);
519 void generate_gs_set_write_offset(struct brw_reg dst
,
521 struct brw_reg src1
);
522 void generate_gs_set_vertex_count(struct brw_reg dst
,
524 void generate_gs_svb_write(vec4_instruction
*inst
,
527 struct brw_reg src1
);
528 void generate_gs_svb_set_destination_index(vec4_instruction
*inst
,
531 void generate_gs_set_dword_2(struct brw_reg dst
, struct brw_reg src
);
532 void generate_gs_prepare_channel_masks(struct brw_reg dst
);
533 void generate_gs_set_channel_masks(struct brw_reg dst
, struct brw_reg src
);
534 void generate_gs_get_instance_id(struct brw_reg dst
);
535 void generate_gs_ff_sync_set_primitives(struct brw_reg dst
,
538 struct brw_reg src2
);
539 void generate_gs_ff_sync(vec4_instruction
*inst
,
542 struct brw_reg src1
);
543 void generate_gs_set_primitive_id(struct brw_reg dst
);
544 void generate_oword_dual_block_offsets(struct brw_reg m1
,
545 struct brw_reg index
);
546 void generate_scratch_write(vec4_instruction
*inst
,
549 struct brw_reg index
);
550 void generate_scratch_read(vec4_instruction
*inst
,
552 struct brw_reg index
);
553 void generate_pull_constant_load(vec4_instruction
*inst
,
555 struct brw_reg index
,
556 struct brw_reg offset
);
557 void generate_pull_constant_load_gen7(vec4_instruction
*inst
,
559 struct brw_reg surf_index
,
560 struct brw_reg offset
);
561 void generate_set_simd4x2_header_gen9(vec4_instruction
*inst
,
564 void generate_get_buffer_size(vec4_instruction
*inst
,
567 struct brw_reg index
);
569 void generate_unpack_flags(struct brw_reg dst
);
571 const struct brw_compiler
*compiler
;
572 void *log_data
; /* Passed to compiler->*_log functions */
574 const struct brw_device_info
*devinfo
;
576 struct brw_codegen
*p
;
578 struct gl_shader_program
*shader_prog
;
579 const struct gl_program
*prog
;
581 struct brw_vue_prog_data
*prog_data
;
584 const char *stage_name
;
585 const char *stage_abbrev
;
586 const bool debug_flag
;
589 } /* namespace brw */
590 #endif /* __cplusplus */
592 #endif /* BRW_VEC4_H */