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"
33 #include "brw_ir_vec4.h"
38 #include "brw_context.h"
40 #include "intel_asm_annotation.h"
47 #include "glsl/nir/nir.h"
55 brw_vec4_generate_assembly(const struct brw_compiler
*compiler
,
58 const nir_shader
*nir
,
59 struct brw_vue_prog_data
*prog_data
,
60 const struct cfg_t
*cfg
,
61 unsigned *out_assembly_size
);
68 class vec4_live_variables
;
71 * The vertex shader front-end.
73 * Translates either GLSL IR or Mesa IR (for ARB_vertex_program and
74 * fixed-function) into VS IR.
76 class vec4_visitor
: public backend_shader
79 vec4_visitor(const struct brw_compiler
*compiler
,
81 const struct brw_sampler_prog_key_data
*key
,
82 struct brw_vue_prog_data
*prog_data
,
83 const nir_shader
*shader
,
86 int shader_time_index
);
87 virtual ~vec4_visitor();
91 return dst_reg(brw_null_reg());
96 return dst_reg(retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
101 return dst_reg(retype(brw_null_reg(), BRW_REGISTER_TYPE_UD
));
104 const struct brw_sampler_prog_key_data
* const key_tex
;
105 struct brw_vue_prog_data
* const prog_data
;
110 * GLSL IR currently being processed, which is associated with our
111 * driver IR instructions for debugging purposes.
114 const char *current_annotation
;
116 int first_non_payload_grf
;
117 unsigned int max_grf
;
118 int *virtual_grf_start
;
119 int *virtual_grf_end
;
120 brw::vec4_live_variables
*live_intervals
;
121 dst_reg userplane
[MAX_CLIP_PLANES
];
123 bool need_all_constants_in_pull_buffer
;
125 /* Regs for vertex results. Generated at ir_variable visiting time
126 * for the ir->location's used.
128 dst_reg output_reg
[BRW_VARYING_SLOT_COUNT
];
129 const char *output_reg_annotation
[BRW_VARYING_SLOT_COUNT
];
131 int uniform_array_size
; /*< Size of the uniform_size array */
134 src_reg shader_start_time
;
137 void fail(const char *msg
, ...);
139 int setup_uniforms(int payload_reg
);
141 bool reg_allocate_trivial();
143 void evaluate_spill_costs(float *spill_costs
, bool *no_spill
);
144 int choose_spill_reg(struct ra_graph
*g
);
145 void spill_reg(int spill_reg
);
146 void move_grf_array_access_to_scratch();
147 void move_uniform_array_access_to_pull_constants();
148 void move_push_constants_to_pull_constants();
149 void split_uniform_registers();
150 void pack_uniform_registers();
151 void calculate_live_intervals();
152 void invalidate_live_intervals();
153 void split_virtual_grfs();
154 bool opt_vector_float();
155 bool opt_reduce_swizzle();
156 bool dead_code_eliminate();
157 int var_range_start(unsigned v
, unsigned n
) const;
158 int var_range_end(unsigned v
, unsigned n
) const;
159 bool virtual_grf_interferes(int a
, int b
);
160 bool opt_cmod_propagation();
161 bool opt_copy_propagation(bool do_constant_prop
= true);
162 bool opt_cse_local(bblock_t
*block
);
164 bool opt_algebraic();
165 bool opt_register_coalesce();
166 bool eliminate_find_live_channel();
167 bool is_dep_ctrl_unsafe(const vec4_instruction
*inst
);
168 void opt_set_dependency_control();
169 void opt_schedule_instructions();
170 void convert_to_hw_regs();
172 vec4_instruction
*emit(vec4_instruction
*inst
);
174 vec4_instruction
*emit(enum opcode opcode
);
175 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
);
176 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
177 const src_reg
&src0
);
178 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
179 const src_reg
&src0
, const src_reg
&src1
);
180 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
181 const src_reg
&src0
, const src_reg
&src1
,
182 const src_reg
&src2
);
184 vec4_instruction
*emit_before(bblock_t
*block
,
185 vec4_instruction
*inst
,
186 vec4_instruction
*new_inst
);
188 #define EMIT1(op) vec4_instruction *op(const dst_reg &, const src_reg &);
189 #define EMIT2(op) vec4_instruction *op(const dst_reg &, const src_reg &, const src_reg &);
190 #define EMIT3(op) vec4_instruction *op(const dst_reg &, const src_reg &, const src_reg &, const src_reg &);
212 vec4_instruction
*CMP(dst_reg dst
, src_reg src0
, src_reg src1
,
213 enum brw_conditional_mod condition
);
214 vec4_instruction
*IF(src_reg src0
, src_reg src1
,
215 enum brw_conditional_mod condition
);
216 vec4_instruction
*IF(enum brw_predicate predicate
);
234 int implied_mrf_writes(vec4_instruction
*inst
);
236 vec4_instruction
*emit_minmax(enum brw_conditional_mod conditionalmod
, dst_reg dst
,
237 src_reg src0
, src_reg src1
);
239 vec4_instruction
*emit_lrp(const dst_reg
&dst
, const src_reg
&x
,
240 const src_reg
&y
, const src_reg
&a
);
243 * Copy any live channel from \p src to the first channel of the
246 src_reg
emit_uniformize(const src_reg
&src
);
248 src_reg
fix_3src_operand(const src_reg
&src
);
249 src_reg
resolve_source_modifiers(const src_reg
&src
);
251 vec4_instruction
*emit_math(enum opcode opcode
, const dst_reg
&dst
, const src_reg
&src0
,
252 const src_reg
&src1
= src_reg());
254 src_reg
fix_math_operand(const src_reg
&src
);
256 void emit_pack_half_2x16(dst_reg dst
, src_reg src0
);
257 void emit_unpack_half_2x16(dst_reg dst
, src_reg src0
);
258 void emit_unpack_unorm_4x8(const dst_reg
&dst
, src_reg src0
);
259 void emit_unpack_snorm_4x8(const dst_reg
&dst
, src_reg src0
);
260 void emit_pack_unorm_4x8(const dst_reg
&dst
, const src_reg
&src0
);
261 void emit_pack_snorm_4x8(const dst_reg
&dst
, const src_reg
&src0
);
263 void emit_texture(ir_texture_opcode op
,
265 const glsl_type
*dest_type
,
267 int coord_components
,
268 src_reg shadow_comparitor
,
269 src_reg lod
, src_reg lod2
,
270 src_reg sample_index
,
271 uint32_t constant_offset
,
272 src_reg offset_value
,
275 uint32_t sampler
, src_reg sampler_reg
);
277 src_reg
emit_mcs_fetch(const glsl_type
*coordinate_type
, src_reg coordinate
,
279 void emit_gen6_gather_wa(uint8_t wa
, dst_reg dst
);
281 void emit_ndc_computation();
282 void emit_psiz_and_flags(dst_reg reg
);
283 vec4_instruction
*emit_generic_urb_slot(dst_reg reg
, int varying
);
284 virtual void emit_urb_slot(dst_reg reg
, int varying
);
286 void emit_shader_time_begin();
287 void emit_shader_time_end();
288 void emit_shader_time_write(int shader_time_subindex
, src_reg value
);
290 void emit_untyped_atomic(unsigned atomic_op
, unsigned surf_index
,
291 dst_reg dst
, src_reg offset
, src_reg src0
,
294 void emit_untyped_surface_read(unsigned surf_index
, dst_reg dst
,
297 src_reg
get_scratch_offset(bblock_t
*block
, vec4_instruction
*inst
,
298 src_reg
*reladdr
, int reg_offset
);
299 src_reg
get_pull_constant_offset(bblock_t
*block
, vec4_instruction
*inst
,
300 src_reg
*reladdr
, int reg_offset
);
301 void emit_scratch_read(bblock_t
*block
, vec4_instruction
*inst
,
305 void emit_scratch_write(bblock_t
*block
, vec4_instruction
*inst
,
307 void emit_pull_constant_load(bblock_t
*block
, vec4_instruction
*inst
,
311 void emit_pull_constant_load_reg(dst_reg dst
,
314 bblock_t
*before_block
,
315 vec4_instruction
*before_inst
);
316 src_reg
emit_resolve_reladdr(int scratch_loc
[], bblock_t
*block
,
317 vec4_instruction
*inst
, src_reg src
);
319 void resolve_ud_negate(src_reg
*reg
);
321 src_reg
get_timestamp();
323 void dump_instruction(backend_instruction
*inst
);
324 void dump_instruction(backend_instruction
*inst
, FILE *file
);
326 bool is_high_sampler(src_reg sampler
);
328 virtual void emit_nir_code();
329 virtual void nir_setup_inputs();
330 virtual void nir_setup_uniforms();
331 virtual void nir_setup_system_value_intrinsic(nir_intrinsic_instr
*instr
);
332 virtual void nir_setup_system_values();
333 virtual void nir_emit_impl(nir_function_impl
*impl
);
334 virtual void nir_emit_cf_list(exec_list
*list
);
335 virtual void nir_emit_if(nir_if
*if_stmt
);
336 virtual void nir_emit_loop(nir_loop
*loop
);
337 virtual void nir_emit_block(nir_block
*block
);
338 virtual void nir_emit_instr(nir_instr
*instr
);
339 virtual void nir_emit_load_const(nir_load_const_instr
*instr
);
340 virtual void nir_emit_intrinsic(nir_intrinsic_instr
*instr
);
341 virtual void nir_emit_alu(nir_alu_instr
*instr
);
342 virtual void nir_emit_jump(nir_jump_instr
*instr
);
343 virtual void nir_emit_texture(nir_tex_instr
*instr
);
344 virtual void nir_emit_undef(nir_ssa_undef_instr
*instr
);
345 virtual void nir_emit_ssbo_atomic(int op
, nir_intrinsic_instr
*instr
);
347 dst_reg
get_nir_dest(nir_dest dest
, enum brw_reg_type type
);
348 dst_reg
get_nir_dest(nir_dest dest
, nir_alu_type type
);
349 dst_reg
get_nir_dest(nir_dest dest
);
350 src_reg
get_nir_src(nir_src src
, enum brw_reg_type type
,
351 unsigned num_components
= 4);
352 src_reg
get_nir_src(nir_src src
, nir_alu_type type
,
353 unsigned num_components
= 4);
354 src_reg
get_nir_src(nir_src src
,
355 unsigned num_components
= 4);
357 virtual dst_reg
*make_reg_for_system_value(int location
,
358 const glsl_type
*type
) = 0;
361 dst_reg
*nir_ssa_values
;
363 dst_reg
*nir_system_values
;
367 void lower_attributes_to_hw_regs(const int *attribute_map
,
369 void setup_payload_interference(struct ra_graph
*g
, int first_payload_node
,
371 virtual void setup_payload() = 0;
372 virtual void emit_prolog() = 0;
373 virtual void emit_thread_end() = 0;
374 virtual void emit_urb_write_header(int mrf
) = 0;
375 virtual vec4_instruction
*emit_urb_write_opcode(bool complete
) = 0;
376 virtual void gs_emit_vertex(int stream_id
);
377 virtual void gs_end_primitive();
381 * If true, then register allocation should fail instead of spilling.
383 const bool no_spills
;
385 int shader_time_index
;
387 unsigned last_scratch
; /**< measured in 32-byte (register size) units */
390 } /* namespace brw */
391 #endif /* __cplusplus */
393 #endif /* BRW_VEC4_H */