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"
30 #include "brw_ir_vec4.h"
31 #include "brw_vec4_builder.h"
32 #include "brw_vec4_live_variables.h"
35 #include "compiler/glsl/ir.h"
36 #include "compiler/nir/nir.h"
44 brw_vec4_generate_assembly(const struct brw_compiler
*compiler
,
47 const nir_shader
*nir
,
48 struct brw_vue_prog_data
*prog_data
,
49 const struct cfg_t
*cfg
,
50 struct brw_compile_stats
*stats
);
57 * The vertex shader front-end.
59 * Translates either GLSL IR or Mesa IR (for ARB_vertex_program and
60 * fixed-function) into VS IR.
62 class vec4_visitor
: public backend_shader
65 vec4_visitor(const struct brw_compiler
*compiler
,
67 const struct brw_sampler_prog_key_data
*key
,
68 struct brw_vue_prog_data
*prog_data
,
69 const nir_shader
*shader
,
72 int shader_time_index
);
76 return dst_reg(brw_null_reg());
81 return dst_reg(retype(brw_null_reg(), BRW_REGISTER_TYPE_DF
));
86 return dst_reg(retype(brw_null_reg(), BRW_REGISTER_TYPE_D
));
91 return dst_reg(retype(brw_null_reg(), BRW_REGISTER_TYPE_UD
));
94 const struct brw_sampler_prog_key_data
* const key_tex
;
95 struct brw_vue_prog_data
* const prog_data
;
100 * GLSL IR currently being processed, which is associated with our
101 * driver IR instructions for debugging purposes.
104 const char *current_annotation
;
106 int first_non_payload_grf
;
107 unsigned int max_grf
;
108 BRW_ANALYSIS(live_analysis
, brw::vec4_live_variables
,
109 backend_shader
*) live_analysis
;
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
[VARYING_SLOT_TESS_MAX
][4];
117 unsigned output_num_components
[VARYING_SLOT_TESS_MAX
][4];
118 const char *output_reg_annotation
[VARYING_SLOT_TESS_MAX
];
121 src_reg shader_start_time
;
124 void fail(const char *msg
, ...);
126 int setup_uniforms(int payload_reg
);
128 bool reg_allocate_trivial();
130 void evaluate_spill_costs(float *spill_costs
, bool *no_spill
);
131 int choose_spill_reg(struct ra_graph
*g
);
132 void spill_reg(unsigned spill_reg
);
133 void move_grf_array_access_to_scratch();
134 void move_uniform_array_access_to_pull_constants();
135 void move_push_constants_to_pull_constants();
136 void split_uniform_registers();
137 void pack_uniform_registers();
138 virtual void invalidate_analysis(brw::analysis_dependency_class c
);
139 void split_virtual_grfs();
140 bool opt_vector_float();
141 bool opt_reduce_swizzle();
142 bool dead_code_eliminate();
143 bool opt_cmod_propagation();
144 bool opt_copy_propagation(bool do_constant_prop
= true);
145 bool opt_cse_local(bblock_t
*block
, const vec4_live_variables
&live
);
147 bool opt_algebraic();
148 bool opt_register_coalesce();
149 bool eliminate_find_live_channel();
150 bool is_dep_ctrl_unsafe(const vec4_instruction
*inst
);
151 void opt_set_dependency_control();
152 void opt_schedule_instructions();
153 void convert_to_hw_regs();
154 void fixup_3src_null_dest();
156 bool is_supported_64bit_region(vec4_instruction
*inst
, unsigned arg
);
157 bool lower_simd_width();
159 bool lower_64bit_mad_to_mul_add();
160 void apply_logical_swizzle(struct brw_reg
*hw_reg
,
161 vec4_instruction
*inst
, int arg
);
163 vec4_instruction
*emit(vec4_instruction
*inst
);
165 vec4_instruction
*emit(enum opcode opcode
);
166 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
);
167 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
168 const src_reg
&src0
);
169 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
170 const src_reg
&src0
, const src_reg
&src1
);
171 vec4_instruction
*emit(enum opcode opcode
, const dst_reg
&dst
,
172 const src_reg
&src0
, const src_reg
&src1
,
173 const src_reg
&src2
);
175 vec4_instruction
*emit_before(bblock_t
*block
,
176 vec4_instruction
*inst
,
177 vec4_instruction
*new_inst
);
179 #define EMIT1(op) vec4_instruction *op(const dst_reg &, const src_reg &);
180 #define EMIT2(op) vec4_instruction *op(const dst_reg &, const src_reg &, const src_reg &);
181 #define EMIT3(op) vec4_instruction *op(const dst_reg &, const src_reg &, const src_reg &, const src_reg &);
203 vec4_instruction
*CMP(dst_reg dst
, src_reg src0
, src_reg src1
,
204 enum brw_conditional_mod condition
);
205 vec4_instruction
*IF(src_reg src0
, src_reg src1
,
206 enum brw_conditional_mod condition
);
207 vec4_instruction
*IF(enum brw_predicate predicate
);
227 vec4_instruction
*emit_minmax(enum brw_conditional_mod conditionalmod
, dst_reg dst
,
228 src_reg src0
, src_reg src1
);
231 * Copy any live channel from \p src to the first channel of the
234 src_reg
emit_uniformize(const src_reg
&src
);
236 /** Fix all float operands of a 3-source instruction. */
237 void fix_float_operands(src_reg op
[3], nir_alu_instr
*instr
);
239 src_reg
fix_3src_operand(const src_reg
&src
);
240 src_reg
resolve_source_modifiers(const src_reg
&src
);
242 vec4_instruction
*emit_math(enum opcode opcode
, const dst_reg
&dst
, const src_reg
&src0
,
243 const src_reg
&src1
= src_reg());
245 src_reg
fix_math_operand(const src_reg
&src
);
247 void emit_pack_half_2x16(dst_reg dst
, src_reg src0
);
248 void emit_unpack_half_2x16(dst_reg dst
, src_reg src0
);
249 void emit_unpack_unorm_4x8(const dst_reg
&dst
, src_reg src0
);
250 void emit_unpack_snorm_4x8(const dst_reg
&dst
, src_reg src0
);
251 void emit_pack_unorm_4x8(const dst_reg
&dst
, const src_reg
&src0
);
252 void emit_pack_snorm_4x8(const dst_reg
&dst
, const src_reg
&src0
);
254 void emit_texture(ir_texture_opcode op
,
256 const glsl_type
*dest_type
,
258 int coord_components
,
259 src_reg shadow_comparator
,
260 src_reg lod
, src_reg lod2
,
261 src_reg sample_index
,
262 uint32_t constant_offset
,
263 src_reg offset_value
,
265 uint32_t surface
, src_reg surface_reg
,
266 src_reg sampler_reg
);
268 src_reg
emit_mcs_fetch(const glsl_type
*coordinate_type
, src_reg coordinate
,
270 void emit_gen6_gather_wa(uint8_t wa
, dst_reg dst
);
272 void emit_ndc_computation();
273 void emit_psiz_and_flags(dst_reg reg
);
274 vec4_instruction
*emit_generic_urb_slot(dst_reg reg
, int varying
, int comp
);
275 virtual void emit_urb_slot(dst_reg reg
, int varying
);
277 void emit_shader_time_begin();
278 void emit_shader_time_end();
279 void emit_shader_time_write(int shader_time_subindex
, src_reg value
);
281 src_reg
get_scratch_offset(bblock_t
*block
, vec4_instruction
*inst
,
282 src_reg
*reladdr
, int reg_offset
);
283 void emit_scratch_read(bblock_t
*block
, vec4_instruction
*inst
,
287 void emit_scratch_write(bblock_t
*block
, vec4_instruction
*inst
,
289 void emit_pull_constant_load(bblock_t
*block
, vec4_instruction
*inst
,
294 void emit_pull_constant_load_reg(dst_reg dst
,
297 bblock_t
*before_block
,
298 vec4_instruction
*before_inst
);
299 src_reg
emit_resolve_reladdr(int scratch_loc
[], bblock_t
*block
,
300 vec4_instruction
*inst
, src_reg src
);
302 void resolve_ud_negate(src_reg
*reg
);
306 src_reg
get_timestamp();
308 void dump_instruction(backend_instruction
*inst
);
309 void dump_instruction(backend_instruction
*inst
, FILE *file
);
311 bool is_high_sampler(src_reg sampler
);
313 bool optimize_predicate(nir_alu_instr
*instr
, enum brw_predicate
*predicate
);
315 void emit_conversion_from_double(dst_reg dst
, src_reg src
, bool saturate
);
316 void emit_conversion_to_double(dst_reg dst
, src_reg src
, bool saturate
);
318 vec4_instruction
*shuffle_64bit_data(dst_reg dst
, src_reg src
,
320 bblock_t
*block
= NULL
,
321 vec4_instruction
*ref
= NULL
);
323 virtual void emit_nir_code();
324 virtual void nir_setup_uniforms();
325 virtual void nir_emit_impl(nir_function_impl
*impl
);
326 virtual void nir_emit_cf_list(exec_list
*list
);
327 virtual void nir_emit_if(nir_if
*if_stmt
);
328 virtual void nir_emit_loop(nir_loop
*loop
);
329 virtual void nir_emit_block(nir_block
*block
);
330 virtual void nir_emit_instr(nir_instr
*instr
);
331 virtual void nir_emit_load_const(nir_load_const_instr
*instr
);
332 src_reg
get_nir_ssbo_intrinsic_index(nir_intrinsic_instr
*instr
);
333 virtual void nir_emit_intrinsic(nir_intrinsic_instr
*instr
);
334 virtual void nir_emit_alu(nir_alu_instr
*instr
);
335 virtual void nir_emit_jump(nir_jump_instr
*instr
);
336 virtual void nir_emit_texture(nir_tex_instr
*instr
);
337 virtual void nir_emit_undef(nir_ssa_undef_instr
*instr
);
338 virtual void nir_emit_ssbo_atomic(int op
, nir_intrinsic_instr
*instr
);
340 dst_reg
get_nir_dest(const nir_dest
&dest
, enum brw_reg_type type
);
341 dst_reg
get_nir_dest(const nir_dest
&dest
, nir_alu_type type
);
342 dst_reg
get_nir_dest(const nir_dest
&dest
);
343 src_reg
get_nir_src(const nir_src
&src
, enum brw_reg_type type
,
344 unsigned num_components
= 4);
345 src_reg
get_nir_src(const nir_src
&src
, nir_alu_type type
,
346 unsigned num_components
= 4);
347 src_reg
get_nir_src(const nir_src
&src
,
348 unsigned num_components
= 4);
349 src_reg
get_nir_src_imm(const nir_src
&src
);
350 src_reg
get_indirect_offset(nir_intrinsic_instr
*instr
);
353 dst_reg
*nir_ssa_values
;
357 void setup_payload_interference(struct ra_graph
*g
, int first_payload_node
,
359 virtual void setup_payload() = 0;
360 virtual void emit_prolog() = 0;
361 virtual void emit_thread_end() = 0;
362 virtual void emit_urb_write_header(int mrf
) = 0;
363 virtual vec4_instruction
*emit_urb_write_opcode(bool complete
) = 0;
364 virtual void gs_emit_vertex(int stream_id
);
365 virtual void gs_end_primitive();
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 */