2 * Copyright © 2010 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 * Eric Anholt <eric@anholt.net>
30 #include "brw_shader.h"
31 #include "brw_ir_fs.h"
32 #include "brw_fs_builder.h"
33 #include "compiler/nir/nir.h"
41 class fs_live_variables
;
44 struct brw_gs_compile
;
47 offset(fs_reg reg
, const brw::fs_builder
& bld
, unsigned delta
)
58 return byte_offset(reg
,
59 delta
* reg
.component_size(bld
.dispatch_width()));
67 * The fragment shader front-end.
69 * Translates either GLSL IR or Mesa IR (for ARB_fragment_program) into FS IR.
71 class fs_visitor
: public backend_shader
74 fs_visitor(const struct brw_compiler
*compiler
, void *log_data
,
77 struct brw_stage_prog_data
*prog_data
,
78 struct gl_program
*prog
,
79 const nir_shader
*shader
,
80 unsigned dispatch_width
,
81 int shader_time_index
,
82 const struct brw_vue_map
*input_vue_map
= NULL
);
83 fs_visitor(const struct brw_compiler
*compiler
, void *log_data
,
85 struct brw_gs_compile
*gs_compile
,
86 struct brw_gs_prog_data
*prog_data
,
87 const nir_shader
*shader
,
88 int shader_time_index
);
92 fs_reg
vgrf(const glsl_type
*const type
);
93 void import_uniforms(fs_visitor
*v
);
94 void setup_uniform_clipplane_values(gl_clip_plane
*clip_planes
);
95 void compute_clip_distance(gl_clip_plane
*clip_planes
);
97 fs_inst
*get_instruction_generating_reg(fs_inst
*start
,
101 void VARYING_PULL_CONSTANT_LOAD(const brw::fs_builder
&bld
,
103 const fs_reg
&surf_index
,
104 const fs_reg
&varying_offset
,
105 uint32_t const_offset
);
106 void DEP_RESOLVE_MOV(const brw::fs_builder
&bld
, int grf
);
108 bool run_fs(bool do_rep_send
);
109 bool run_vs(gl_clip_plane
*clip_planes
);
110 bool run_tcs_single_patch();
115 void allocate_registers();
116 void setup_fs_payload_gen4();
117 void setup_fs_payload_gen6();
118 void setup_vs_payload();
119 void setup_gs_payload();
120 void setup_cs_payload();
121 void fixup_3src_null_dest();
122 void assign_curb_setup();
123 void calculate_urb_setup();
124 void assign_urb_setup();
125 void convert_attr_sources_to_hw_regs(fs_inst
*inst
);
126 void assign_vs_urb_setup();
127 void assign_tcs_single_patch_urb_setup();
128 void assign_tes_urb_setup();
129 void assign_gs_urb_setup();
130 bool assign_regs(bool allow_spilling
);
131 void assign_regs_trivial();
132 void calculate_payload_ranges(int payload_node_count
,
133 int *payload_last_use_ip
);
134 void setup_payload_interference(struct ra_graph
*g
, int payload_reg_count
,
135 int first_payload_node
);
136 int choose_spill_reg(struct ra_graph
*g
);
137 void spill_reg(int spill_reg
);
138 void split_virtual_grfs();
139 bool compact_virtual_grfs();
140 void assign_constant_locations();
141 void lower_constant_loads();
142 void invalidate_live_intervals();
143 void calculate_live_intervals();
144 void calculate_register_pressure();
146 bool opt_algebraic();
147 bool opt_redundant_discard_jumps();
149 bool opt_cse_local(bblock_t
*block
);
150 bool opt_copy_propagate();
151 bool try_copy_propagate(fs_inst
*inst
, int arg
, acp_entry
*entry
);
152 bool try_constant_propagate(fs_inst
*inst
, acp_entry
*entry
);
153 bool opt_copy_propagate_local(void *mem_ctx
, bblock_t
*block
,
155 bool opt_drop_redundant_mov_to_flags();
156 bool opt_register_renaming();
157 bool register_coalesce();
158 bool compute_to_mrf();
159 bool eliminate_find_live_channel();
160 bool dead_code_eliminate();
161 bool remove_duplicate_mrf_writes();
163 bool opt_sampler_eot();
164 bool virtual_grf_interferes(int a
, int b
);
165 void schedule_instructions(instruction_scheduler_mode mode
);
166 void insert_gen4_send_dependency_workarounds();
167 void insert_gen4_pre_send_dependency_workarounds(bblock_t
*block
,
169 void insert_gen4_post_send_dependency_workarounds(bblock_t
*block
,
171 void vfail(const char *msg
, va_list args
);
172 void fail(const char *msg
, ...);
173 void no16(const char *msg
);
174 void lower_uniform_pull_constant_loads();
175 bool lower_load_payload();
178 bool lower_logical_sends();
179 bool lower_integer_multiplication();
181 bool lower_simd_width();
182 bool opt_combine_constants();
184 void emit_dummy_fs();
185 void emit_repclear_shader();
186 fs_reg
*emit_fragcoord_interpolation(bool pixel_center_integer
,
187 bool origin_upper_left
);
188 fs_inst
*emit_linterp(const fs_reg
&attr
, const fs_reg
&interp
,
189 glsl_interp_qualifier interpolation_mode
,
190 bool is_centroid
, bool is_sample
);
191 fs_reg
*emit_frontfacing_interpolation();
192 fs_reg
*emit_samplepos_setup();
193 fs_reg
*emit_sampleid_setup();
194 fs_reg
*emit_samplemaskin_setup();
195 void emit_general_interpolation(fs_reg
*attr
, const char *name
,
196 const glsl_type
*type
,
197 glsl_interp_qualifier interpolation_mode
,
198 int *location
, bool mod_centroid
,
200 fs_reg
*emit_vs_system_value(int location
);
201 void emit_interpolation_setup_gen4();
202 void emit_interpolation_setup_gen6();
203 void compute_sample_position(fs_reg dst
, fs_reg int_sample_pos
);
204 fs_reg
emit_mcs_fetch(const fs_reg
&coordinate
, unsigned components
,
205 const fs_reg
&sampler
);
206 void emit_gen6_gather_wa(uint8_t wa
, fs_reg dst
);
207 fs_reg
resolve_source_modifiers(const fs_reg
&src
);
208 void emit_discard_jump();
209 bool opt_peephole_sel();
210 bool opt_peephole_predicated_break();
211 bool opt_saturate_propagation();
212 bool opt_cmod_propagation();
213 bool opt_zero_samples();
214 void emit_unspill(bblock_t
*block
, fs_inst
*inst
, fs_reg reg
,
215 uint32_t spill_offset
, int count
);
216 void emit_spill(bblock_t
*block
, fs_inst
*inst
, fs_reg reg
,
217 uint32_t spill_offset
, int count
);
219 void emit_nir_code();
220 void nir_setup_inputs();
221 void nir_setup_single_output_varying(fs_reg
*reg
, const glsl_type
*type
,
223 void nir_setup_outputs();
224 void nir_setup_uniforms();
225 void nir_emit_system_values();
226 void nir_emit_impl(nir_function_impl
*impl
);
227 void nir_emit_cf_list(exec_list
*list
);
228 void nir_emit_if(nir_if
*if_stmt
);
229 void nir_emit_loop(nir_loop
*loop
);
230 void nir_emit_block(nir_block
*block
);
231 void nir_emit_instr(nir_instr
*instr
);
232 void nir_emit_alu(const brw::fs_builder
&bld
, nir_alu_instr
*instr
);
233 void nir_emit_load_const(const brw::fs_builder
&bld
,
234 nir_load_const_instr
*instr
);
235 void nir_emit_undef(const brw::fs_builder
&bld
,
236 nir_ssa_undef_instr
*instr
);
237 void nir_emit_vs_intrinsic(const brw::fs_builder
&bld
,
238 nir_intrinsic_instr
*instr
);
239 void nir_emit_tcs_intrinsic(const brw::fs_builder
&bld
,
240 nir_intrinsic_instr
*instr
);
241 void nir_emit_gs_intrinsic(const brw::fs_builder
&bld
,
242 nir_intrinsic_instr
*instr
);
243 void nir_emit_fs_intrinsic(const brw::fs_builder
&bld
,
244 nir_intrinsic_instr
*instr
);
245 void nir_emit_cs_intrinsic(const brw::fs_builder
&bld
,
246 nir_intrinsic_instr
*instr
);
247 void nir_emit_intrinsic(const brw::fs_builder
&bld
,
248 nir_intrinsic_instr
*instr
);
249 void nir_emit_tes_intrinsic(const brw::fs_builder
&bld
,
250 nir_intrinsic_instr
*instr
);
251 void nir_emit_ssbo_atomic(const brw::fs_builder
&bld
,
252 int op
, nir_intrinsic_instr
*instr
);
253 void nir_emit_shared_atomic(const brw::fs_builder
&bld
,
254 int op
, nir_intrinsic_instr
*instr
);
255 void nir_emit_texture(const brw::fs_builder
&bld
,
256 nir_tex_instr
*instr
);
257 void nir_emit_jump(const brw::fs_builder
&bld
,
258 nir_jump_instr
*instr
);
259 fs_reg
get_nir_src(nir_src src
);
260 fs_reg
get_nir_dest(nir_dest dest
);
261 fs_reg
get_nir_image_deref(const nir_deref_var
*deref
);
262 fs_reg
get_indirect_offset(nir_intrinsic_instr
*instr
);
263 void emit_percomp(const brw::fs_builder
&bld
, const fs_inst
&inst
,
266 bool optimize_extract_to_float(nir_alu_instr
*instr
,
267 const fs_reg
&result
);
268 bool optimize_frontfacing_ternary(nir_alu_instr
*instr
,
269 const fs_reg
&result
);
271 void emit_alpha_test();
272 fs_inst
*emit_single_fb_write(const brw::fs_builder
&bld
,
273 fs_reg color1
, fs_reg color2
,
274 fs_reg src0_alpha
, unsigned components
);
275 void emit_fb_writes();
276 void emit_urb_writes(const fs_reg
&gs_vertex_count
= fs_reg());
277 void set_gs_stream_control_data_bits(const fs_reg
&vertex_count
,
279 void emit_gs_control_data_bits(const fs_reg
&vertex_count
);
280 void emit_gs_end_primitive(const nir_src
&vertex_count_nir_src
);
281 void emit_gs_vertex(const nir_src
&vertex_count_nir_src
,
283 void emit_gs_thread_end();
284 void emit_gs_input_load(const fs_reg
&dst
, const nir_src
&vertex_src
,
285 unsigned base_offset
, const nir_src
&offset_src
,
286 unsigned num_components
);
287 void emit_cs_terminate();
288 fs_reg
*emit_cs_local_invocation_id_setup();
289 fs_reg
*emit_cs_work_group_id_setup();
293 void emit_shader_time_begin();
294 void emit_shader_time_end();
295 void SHADER_TIME_ADD(const brw::fs_builder
&bld
,
296 int shader_time_subindex
,
299 fs_reg
get_timestamp(const brw::fs_builder
&bld
);
301 struct brw_reg
interp_reg(int location
, int channel
);
303 int implied_mrf_writes(fs_inst
*inst
);
305 virtual void dump_instructions();
306 virtual void dump_instructions(const char *name
);
307 void dump_instruction(backend_instruction
*inst
);
308 void dump_instruction(backend_instruction
*inst
, FILE *file
);
310 const void *const key
;
311 const struct brw_sampler_prog_key_data
*key_tex
;
313 struct brw_gs_compile
*gs_compile
;
315 struct brw_stage_prog_data
*prog_data
;
316 struct gl_program
*prog
;
318 const struct brw_vue_map
*input_vue_map
;
320 int *virtual_grf_start
;
321 int *virtual_grf_end
;
322 brw::fs_live_variables
*live_intervals
;
324 int *regs_live_at_ip
;
326 /** Number of uniform variable components visited. */
329 /** Byte-offset for the next available spot in the scratch space buffer. */
330 unsigned last_scratch
;
333 * Array mapping UNIFORM register numbers to the pull parameter index,
334 * or -1 if this uniform register isn't being uploaded as a pull constant.
336 int *pull_constant_loc
;
339 * Array mapping UNIFORM register numbers to the push parameter index,
340 * or -1 if this uniform register isn't being uploaded as a push constant.
342 int *push_constant_loc
;
347 fs_reg outputs
[VARYING_SLOT_MAX
];
348 unsigned output_components
[VARYING_SLOT_MAX
];
349 fs_reg dual_src_output
;
351 int first_non_payload_grf
;
352 /** Either BRW_MAX_GRF or GEN7_MRF_HACK_START */
356 fs_reg
*nir_ssa_values
;
359 fs_reg
*nir_system_values
;
363 bool simd16_unsupported
;
366 /** Register numbers for thread payload fields. */
367 struct thread_payload
{
368 uint8_t source_depth_reg
;
369 uint8_t source_w_reg
;
370 uint8_t aa_dest_stencil_reg
;
371 uint8_t dest_depth_reg
;
372 uint8_t sample_pos_reg
;
373 uint8_t sample_mask_in_reg
;
374 uint8_t barycentric_coord_reg
[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT
];
375 uint8_t local_invocation_id_reg
;
377 /** The number of thread payload registers the hardware will supply. */
381 bool source_depth_to_render_target
;
382 bool runtime_check_aads_emit
;
388 fs_reg delta_xy
[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT
];
389 fs_reg shader_start_time
;
390 fs_reg userplane
[MAX_CLIP_PLANES
];
391 fs_reg final_gs_vertex_count
;
392 fs_reg control_data_bits
;
393 fs_reg invocation_id
;
396 bool spilled_any_registers
;
398 const unsigned dispatch_width
; /**< 8 or 16 */
399 unsigned min_dispatch_width
;
401 int shader_time_index
;
403 unsigned promoted_constants
;
408 * The fragment shader code generator.
410 * Translates FS IR to actual i965 assembly code.
415 fs_generator(const struct brw_compiler
*compiler
, void *log_data
,
418 struct brw_stage_prog_data
*prog_data
,
419 unsigned promoted_constants
,
420 bool runtime_check_aads_emit
,
421 gl_shader_stage stage
);
424 void enable_debug(const char *shader_name
);
425 int generate_code(const cfg_t
*cfg
, int dispatch_width
);
426 const unsigned *get_assembly(unsigned int *assembly_size
);
429 void fire_fb_write(fs_inst
*inst
,
430 struct brw_reg payload
,
431 struct brw_reg implied_header
,
433 void generate_fb_write(fs_inst
*inst
, struct brw_reg payload
);
434 void generate_urb_read(fs_inst
*inst
, struct brw_reg dst
, struct brw_reg payload
);
435 void generate_urb_write(fs_inst
*inst
, struct brw_reg payload
);
436 void generate_cs_terminate(fs_inst
*inst
, struct brw_reg payload
);
437 void generate_stencil_ref_packing(fs_inst
*inst
, struct brw_reg dst
,
439 void generate_barrier(fs_inst
*inst
, struct brw_reg src
);
440 void generate_blorp_fb_write(fs_inst
*inst
, struct brw_reg payload
);
441 void generate_linterp(fs_inst
*inst
, struct brw_reg dst
,
442 struct brw_reg
*src
);
443 void generate_tex(fs_inst
*inst
, struct brw_reg dst
, struct brw_reg src
,
444 struct brw_reg surface_index
,
445 struct brw_reg sampler_index
);
446 void generate_get_buffer_size(fs_inst
*inst
, struct brw_reg dst
,
448 struct brw_reg surf_index
);
449 void generate_math_gen6(fs_inst
*inst
,
452 struct brw_reg src1
);
453 void generate_math_gen4(fs_inst
*inst
,
456 void generate_math_g45(fs_inst
*inst
,
459 void generate_ddx(enum opcode op
, struct brw_reg dst
, struct brw_reg src
);
460 void generate_ddy(enum opcode op
, struct brw_reg dst
, struct brw_reg src
,
462 void generate_scratch_write(fs_inst
*inst
, struct brw_reg src
);
463 void generate_scratch_read(fs_inst
*inst
, struct brw_reg dst
);
464 void generate_scratch_read_gen7(fs_inst
*inst
, struct brw_reg dst
);
465 void generate_uniform_pull_constant_load(fs_inst
*inst
, struct brw_reg dst
,
466 struct brw_reg index
,
467 struct brw_reg offset
);
468 void generate_uniform_pull_constant_load_gen7(fs_inst
*inst
,
470 struct brw_reg surf_index
,
471 struct brw_reg offset
);
472 void generate_varying_pull_constant_load(fs_inst
*inst
, struct brw_reg dst
,
473 struct brw_reg index
,
474 struct brw_reg offset
);
475 void generate_varying_pull_constant_load_gen7(fs_inst
*inst
,
477 struct brw_reg index
,
478 struct brw_reg offset
);
479 void generate_mov_dispatch_to_flags(fs_inst
*inst
);
481 void generate_pixel_interpolator_query(fs_inst
*inst
,
484 struct brw_reg msg_data
,
487 void generate_set_sample_id(fs_inst
*inst
,
490 struct brw_reg src1
);
492 void generate_set_simd4x2_offset(fs_inst
*inst
,
494 struct brw_reg offset
);
495 void generate_discard_jump(fs_inst
*inst
);
497 void generate_pack_half_2x16_split(fs_inst
*inst
,
501 void generate_unpack_half_2x16_split(fs_inst
*inst
,
505 void generate_shader_time_add(fs_inst
*inst
,
506 struct brw_reg payload
,
507 struct brw_reg offset
,
508 struct brw_reg value
);
510 void generate_mov_indirect(fs_inst
*inst
,
513 struct brw_reg indirect_byte_offset
);
515 bool patch_discard_jumps_to_fb_writes();
517 const struct brw_compiler
*compiler
;
518 void *log_data
; /* Passed to compiler->*_log functions */
520 const struct brw_device_info
*devinfo
;
522 struct brw_codegen
*p
;
523 const void * const key
;
524 struct brw_stage_prog_data
* const prog_data
;
526 unsigned dispatch_width
; /**< 8 or 16 */
528 exec_list discard_halt_patches
;
529 unsigned promoted_constants
;
530 bool runtime_check_aads_emit
;
532 const char *shader_name
;
533 gl_shader_stage stage
;
537 bool brw_do_channel_expressions(struct exec_list
*instructions
);
538 bool brw_do_vector_splitting(struct exec_list
*instructions
);