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
27 #include "brw_shader.h"
28 #include "brw_program.h"
31 #include "brw_ir_vec4.h"
34 #include "compiler/glsl/ir.h"
35 #include "compiler/nir/nir.h"
43 brw_vec4_generate_assembly(const struct brw_compiler
*compiler
,
46 const nir_shader
*nir
,
47 struct brw_vue_prog_data
*prog_data
,
48 const struct cfg_t
*cfg
,
49 unsigned *out_assembly_size
);
56 class vec4_live_variables
;
59 * The vertex shader front-end.
61 * Translates either GLSL IR or Mesa IR (for ARB_vertex_program and
62 * fixed-function) into VS IR.
64 class vec4_visitor
: public backend_shader
67 vec4_visitor(const struct brw_compiler
*compiler
,
69 const struct brw_sampler_prog_key_data
*key
,
70 struct brw_vue_prog_data
*prog_data
,
71 const nir_shader
*shader
,
74 int shader_time_index
);
75 virtual ~vec4_visitor();
79 return dst_reg(brw_null_reg());
84 return dst_reg(retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
89 return dst_reg(retype(brw_null_reg(), BRW_REGISTER_TYPE_UD
));
92 const struct brw_sampler_prog_key_data
* const key_tex
;
93 struct brw_vue_prog_data
* const prog_data
;
98 * GLSL IR currently being processed, which is associated with our
99 * driver IR instructions for debugging purposes.
102 const char *current_annotation
;
104 int first_non_payload_grf
;
105 unsigned int max_grf
;
106 int *virtual_grf_start
;
107 int *virtual_grf_end
;
108 brw::vec4_live_variables
*live_intervals
;
109 dst_reg userplane
[MAX_CLIP_PLANES
];
111 bool need_all_constants_in_pull_buffer
;
113 /* Regs for vertex results. Generated at ir_variable visiting time
114 * for the ir->location's used.
116 dst_reg output_reg
[BRW_VARYING_SLOT_COUNT
];
117 const char *output_reg_annotation
[BRW_VARYING_SLOT_COUNT
];
119 int uniform_array_size
; /*< Size of the uniform_size array */
122 src_reg shader_start_time
;
125 void fail(const char *msg
, ...);
127 int setup_uniforms(int payload_reg
);
129 bool reg_allocate_trivial();
131 void evaluate_spill_costs(float *spill_costs
, bool *no_spill
);
132 int choose_spill_reg(struct ra_graph
*g
);
133 void spill_reg(int spill_reg
);
134 void move_grf_array_access_to_scratch();
135 void move_uniform_array_access_to_pull_constants();
136 void move_push_constants_to_pull_constants();
137 void split_uniform_registers();
138 void pack_uniform_registers();
139 void calculate_live_intervals();
140 void invalidate_live_intervals();
141 void split_virtual_grfs();
142 bool opt_vector_float();
143 bool opt_reduce_swizzle();
144 bool dead_code_eliminate();
145 int var_range_start(unsigned v
, unsigned n
) const;
146 int var_range_end(unsigned v
, unsigned n
) const;
147 bool virtual_grf_interferes(int a
, int b
);
148 bool opt_cmod_propagation();
149 bool opt_copy_propagation(bool do_constant_prop
= true);
150 bool opt_cse_local(bblock_t
*block
);
152 bool opt_algebraic();
153 bool opt_register_coalesce();
154 bool eliminate_find_live_channel();
155 bool is_dep_ctrl_unsafe(const vec4_instruction
*inst
);
156 void opt_set_dependency_control();
157 void opt_schedule_instructions();
158 void convert_to_hw_regs();
160 vec4_instruction
*emit(vec4_instruction
*inst
);
162 vec4_instruction
*emit(enum opcode opcode
);
163 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
);
164 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
165 const src_reg
&src0
);
166 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
167 const src_reg
&src0
, const src_reg
&src1
);
168 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
169 const src_reg
&src0
, const src_reg
&src1
,
170 const src_reg
&src2
);
172 vec4_instruction
*emit_before(bblock_t
*block
,
173 vec4_instruction
*inst
,
174 vec4_instruction
*new_inst
);
176 #define EMIT1(op) vec4_instruction *op(const dst_reg &, const src_reg &);
177 #define EMIT2(op) vec4_instruction *op(const dst_reg &, const src_reg &, const src_reg &);
178 #define EMIT3(op) vec4_instruction *op(const dst_reg &, const src_reg &, const src_reg &, const src_reg &);
200 vec4_instruction
*CMP(dst_reg dst
, src_reg src0
, src_reg src1
,
201 enum brw_conditional_mod condition
);
202 vec4_instruction
*IF(src_reg src0
, src_reg src1
,
203 enum brw_conditional_mod condition
);
204 vec4_instruction
*IF(enum brw_predicate predicate
);
222 int implied_mrf_writes(vec4_instruction
*inst
);
224 vec4_instruction
*emit_minmax(enum brw_conditional_mod conditionalmod
, dst_reg dst
,
225 src_reg src0
, src_reg src1
);
227 vec4_instruction
*emit_lrp(const dst_reg
&dst
, const src_reg
&x
,
228 const src_reg
&y
, const src_reg
&a
);
231 * Copy any live channel from \p src to the first channel of the
234 src_reg
emit_uniformize(const src_reg
&src
);
236 src_reg
fix_3src_operand(const src_reg
&src
);
237 src_reg
resolve_source_modifiers(const src_reg
&src
);
239 vec4_instruction
*emit_math(enum opcode opcode
, const dst_reg
&dst
, const src_reg
&src0
,
240 const src_reg
&src1
= src_reg());
242 src_reg
fix_math_operand(const src_reg
&src
);
244 void emit_pack_half_2x16(dst_reg dst
, src_reg src0
);
245 void emit_unpack_half_2x16(dst_reg dst
, src_reg src0
);
246 void emit_unpack_unorm_4x8(const dst_reg
&dst
, src_reg src0
);
247 void emit_unpack_snorm_4x8(const dst_reg
&dst
, src_reg src0
);
248 void emit_pack_unorm_4x8(const dst_reg
&dst
, const src_reg
&src0
);
249 void emit_pack_snorm_4x8(const dst_reg
&dst
, const src_reg
&src0
);
251 void emit_texture(ir_texture_opcode op
,
253 const glsl_type
*dest_type
,
255 int coord_components
,
256 src_reg shadow_comparitor
,
257 src_reg lod
, src_reg lod2
,
258 src_reg sample_index
,
259 uint32_t constant_offset
,
260 src_reg offset_value
,
263 uint32_t surface
, src_reg surface_reg
,
264 uint32_t sampler
, src_reg sampler_reg
);
266 src_reg
emit_mcs_fetch(const glsl_type
*coordinate_type
, src_reg coordinate
,
268 void emit_gen6_gather_wa(uint8_t wa
, dst_reg dst
);
270 void emit_ndc_computation();
271 void emit_psiz_and_flags(dst_reg reg
);
272 vec4_instruction
*emit_generic_urb_slot(dst_reg reg
, int varying
);
273 virtual void emit_urb_slot(dst_reg reg
, int varying
);
275 void emit_shader_time_begin();
276 void emit_shader_time_end();
277 void emit_shader_time_write(int shader_time_subindex
, src_reg value
);
279 src_reg
get_scratch_offset(bblock_t
*block
, vec4_instruction
*inst
,
280 src_reg
*reladdr
, int reg_offset
);
281 void emit_scratch_read(bblock_t
*block
, vec4_instruction
*inst
,
285 void emit_scratch_write(bblock_t
*block
, vec4_instruction
*inst
,
287 void emit_pull_constant_load(bblock_t
*block
, vec4_instruction
*inst
,
292 void emit_pull_constant_load_reg(dst_reg dst
,
295 bblock_t
*before_block
,
296 vec4_instruction
*before_inst
);
297 src_reg
emit_resolve_reladdr(int scratch_loc
[], bblock_t
*block
,
298 vec4_instruction
*inst
, src_reg src
);
300 void resolve_ud_negate(src_reg
*reg
);
304 src_reg
get_timestamp();
306 void dump_instruction(backend_instruction
*inst
);
307 void dump_instruction(backend_instruction
*inst
, FILE *file
);
309 bool is_high_sampler(src_reg sampler
);
311 bool optimize_predicate(nir_alu_instr
*instr
, enum brw_predicate
*predicate
);
313 virtual void emit_nir_code();
314 virtual void nir_setup_uniforms();
315 virtual void nir_setup_system_value_intrinsic(nir_intrinsic_instr
*instr
);
316 virtual void nir_setup_system_values();
317 virtual void nir_emit_impl(nir_function_impl
*impl
);
318 virtual void nir_emit_cf_list(exec_list
*list
);
319 virtual void nir_emit_if(nir_if
*if_stmt
);
320 virtual void nir_emit_loop(nir_loop
*loop
);
321 virtual void nir_emit_block(nir_block
*block
);
322 virtual void nir_emit_instr(nir_instr
*instr
);
323 virtual void nir_emit_load_const(nir_load_const_instr
*instr
);
324 virtual void nir_emit_intrinsic(nir_intrinsic_instr
*instr
);
325 virtual void nir_emit_alu(nir_alu_instr
*instr
);
326 virtual void nir_emit_jump(nir_jump_instr
*instr
);
327 virtual void nir_emit_texture(nir_tex_instr
*instr
);
328 virtual void nir_emit_undef(nir_ssa_undef_instr
*instr
);
329 virtual void nir_emit_ssbo_atomic(int op
, nir_intrinsic_instr
*instr
);
331 dst_reg
get_nir_dest(nir_dest dest
, enum brw_reg_type type
);
332 dst_reg
get_nir_dest(nir_dest dest
, nir_alu_type type
);
333 dst_reg
get_nir_dest(nir_dest dest
);
334 src_reg
get_nir_src(nir_src src
, enum brw_reg_type type
,
335 unsigned num_components
= 4);
336 src_reg
get_nir_src(nir_src src
, nir_alu_type type
,
337 unsigned num_components
= 4);
338 src_reg
get_nir_src(nir_src src
,
339 unsigned num_components
= 4);
340 src_reg
get_indirect_offset(nir_intrinsic_instr
*instr
);
342 virtual dst_reg
*make_reg_for_system_value(int location
,
343 const glsl_type
*type
) = 0;
346 dst_reg
*nir_ssa_values
;
347 dst_reg
*nir_system_values
;
351 void lower_attributes_to_hw_regs(const int *attribute_map
,
353 void setup_payload_interference(struct ra_graph
*g
, int first_payload_node
,
355 virtual void setup_payload() = 0;
356 virtual void emit_prolog() = 0;
357 virtual void emit_thread_end() = 0;
358 virtual void emit_urb_write_header(int mrf
) = 0;
359 virtual vec4_instruction
*emit_urb_write_opcode(bool complete
) = 0;
360 virtual void gs_emit_vertex(int stream_id
);
361 virtual void gs_end_primitive();
364 bool vectorize_mov(bblock_t
*block
, vec4_instruction
*inst
,
365 uint8_t imm
[4], vec4_instruction
*imm_inst
[4],
366 int inst_count
, unsigned writemask
);
369 * If true, then register allocation should fail instead of spilling.
371 const bool no_spills
;
373 int shader_time_index
;
375 unsigned last_scratch
; /**< measured in 32-byte (register size) units */
378 } /* namespace brw */
379 #endif /* __cplusplus */
381 #endif /* BRW_VEC4_H */