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"
34 #include <sys/types.h>
36 #include "main/macros.h"
37 #include "main/shaderobj.h"
38 #include "main/uniforms.h"
39 #include "program/prog_parameter.h"
40 #include "program/prog_print.h"
41 #include "program/prog_optimize.h"
42 #include "program/register_allocate.h"
43 #include "program/sampler.h"
44 #include "program/hash_table.h"
45 #include "brw_context.h"
49 #include "glsl/glsl_types.h"
63 FIXED_HW_REG
, /* a struct brw_reg */
64 UNIFORM
, /* prog_data->params[reg] */
69 /* Callers of this ralloc-based new need not call delete. It's
70 * easier to just ralloc_free 'ctx' (or any of its ancestors). */
71 static void* operator new(size_t size
, void *ctx
)
75 node
= ralloc_size(ctx
, size
);
87 fs_reg(struct brw_reg fixed_hw_reg
);
88 fs_reg(enum register_file file
, int reg
);
89 fs_reg(enum register_file file
, int reg
, uint32_t type
);
90 fs_reg(class fs_visitor
*v
, const struct glsl_type
*type
);
92 bool equals(const fs_reg
&r
) const;
94 /** Register file: ARF, GRF, MRF, IMM. */
95 enum register_file file
;
97 * Register number. For ARF/MRF, it's the hardware register. For
98 * GRF, it's a virtual register number until register allocation
102 * For virtual registers, this is a hardware register offset from
103 * the start of the register block (for example, a constant index
104 * in an array access).
107 /** Register type. BRW_REGISTER_TYPE_* */
112 struct brw_reg fixed_hw_reg
;
113 int smear
; /* -1, or a channel of the reg to smear to all channels. */
115 /** Value for file == IMM */
123 static const fs_reg reg_undef
;
124 static const fs_reg
reg_null_f(ARF
, BRW_ARF_NULL
, BRW_REGISTER_TYPE_F
);
125 static const fs_reg
reg_null_d(ARF
, BRW_ARF_NULL
, BRW_REGISTER_TYPE_D
);
127 class fs_inst
: public exec_node
{
129 /* Callers of this ralloc-based new need not call delete. It's
130 * easier to just ralloc_free 'ctx' (or any of its ancestors). */
131 static void* operator new(size_t size
, void *ctx
)
135 node
= rzalloc_size(ctx
, size
);
136 assert(node
!= NULL
);
144 fs_inst(enum opcode opcode
);
145 fs_inst(enum opcode opcode
, fs_reg dst
);
146 fs_inst(enum opcode opcode
, fs_reg dst
, fs_reg src0
);
147 fs_inst(enum opcode opcode
, fs_reg dst
, fs_reg src0
, fs_reg src1
);
148 fs_inst(enum opcode opcode
, fs_reg dst
,
149 fs_reg src0
, fs_reg src1
,fs_reg src2
);
151 bool equals(fs_inst
*inst
);
153 bool overwrites_reg(const fs_reg
®
);
157 enum opcode opcode
; /* BRW_OPCODE_* or FS_OPCODE_* */
162 bool predicate_inverse
;
163 int conditional_mod
; /**< BRW_CONDITIONAL_* */
165 int mlen
; /**< SEND message length */
166 int base_mrf
; /**< First MRF in the SEND message, if mlen is nonzero. */
167 uint32_t texture_offset
; /**< Texture offset bitfield */
169 int target
; /**< MRT target. */
173 bool force_uncompressed
;
175 uint32_t offset
; /* spill/unspill offset */
178 * Annotation for the generated IR. One of the two can be set.
181 const char *annotation
;
185 class fs_visitor
: public ir_visitor
189 fs_visitor(struct brw_wm_compile
*c
, struct gl_shader_program
*prog
,
190 struct brw_shader
*shader
);
193 fs_reg
*variable_storage(ir_variable
*var
);
194 int virtual_grf_alloc(int size
);
195 void import_uniforms(fs_visitor
*v
);
197 void visit(ir_variable
*ir
);
198 void visit(ir_assignment
*ir
);
199 void visit(ir_dereference_variable
*ir
);
200 void visit(ir_dereference_record
*ir
);
201 void visit(ir_dereference_array
*ir
);
202 void visit(ir_expression
*ir
);
203 void visit(ir_texture
*ir
);
204 void visit(ir_if
*ir
);
205 void visit(ir_constant
*ir
);
206 void visit(ir_swizzle
*ir
);
207 void visit(ir_return
*ir
);
208 void visit(ir_loop
*ir
);
209 void visit(ir_loop_jump
*ir
);
210 void visit(ir_discard
*ir
);
211 void visit(ir_call
*ir
);
212 void visit(ir_function
*ir
);
213 void visit(ir_function_signature
*ir
);
215 void swizzle_result(ir_texture
*ir
, fs_reg orig_val
, int sampler
);
217 fs_inst
*emit(fs_inst inst
);
219 fs_inst
*emit(enum opcode opcode
);
220 fs_inst
*emit(enum opcode opcode
, fs_reg dst
);
221 fs_inst
*emit(enum opcode opcode
, fs_reg dst
, fs_reg src0
);
222 fs_inst
*emit(enum opcode opcode
, fs_reg dst
, fs_reg src0
, fs_reg src1
);
223 fs_inst
*emit(enum opcode opcode
, fs_reg dst
,
224 fs_reg src0
, fs_reg src1
, fs_reg src2
);
226 int type_size(const struct glsl_type
*type
);
227 fs_inst
*get_instruction_generating_reg(fs_inst
*start
,
232 void setup_paramvalues_refs();
233 void assign_curb_setup();
234 void calculate_urb_setup();
235 void assign_urb_setup();
237 void assign_regs_trivial();
238 int choose_spill_reg(struct ra_graph
*g
);
239 void spill_reg(int spill_reg
);
240 void split_virtual_grfs();
241 void setup_pull_constants();
242 void calculate_live_intervals();
243 bool propagate_constants();
244 bool opt_algebraic();
246 bool opt_cse_local(fs_bblock
*block
, exec_list
*aeb
);
247 bool opt_copy_propagate();
248 bool try_copy_propagate(fs_inst
*inst
, int arg
, acp_entry
*entry
);
249 bool opt_copy_propagate_local(void *mem_ctx
, fs_bblock
*block
,
251 bool register_coalesce();
252 bool register_coalesce_2();
253 bool compute_to_mrf();
254 bool dead_code_eliminate();
255 bool remove_dead_constants();
256 bool remove_duplicate_mrf_writes();
257 bool virtual_grf_interferes(int a
, int b
);
258 void schedule_instructions();
259 void fail(const char *msg
, ...);
261 void push_force_uncompressed();
262 void pop_force_uncompressed();
263 void push_force_sechalf();
264 void pop_force_sechalf();
266 void generate_code();
267 void generate_fb_write(fs_inst
*inst
);
268 void generate_pixel_xy(struct brw_reg dst
, bool is_x
);
269 void generate_linterp(fs_inst
*inst
, struct brw_reg dst
,
270 struct brw_reg
*src
);
271 void generate_tex(fs_inst
*inst
, struct brw_reg dst
, struct brw_reg src
);
272 void generate_math1_gen7(fs_inst
*inst
,
275 void generate_math2_gen7(fs_inst
*inst
,
278 struct brw_reg src1
);
279 void generate_math1_gen6(fs_inst
*inst
,
282 void generate_math2_gen6(fs_inst
*inst
,
285 struct brw_reg src1
);
286 void generate_math_gen4(fs_inst
*inst
,
289 void generate_discard(fs_inst
*inst
);
290 void generate_ddx(fs_inst
*inst
, struct brw_reg dst
, struct brw_reg src
);
291 void generate_ddy(fs_inst
*inst
, struct brw_reg dst
, struct brw_reg src
,
293 void generate_spill(fs_inst
*inst
, struct brw_reg src
);
294 void generate_unspill(fs_inst
*inst
, struct brw_reg dst
);
295 void generate_pull_constant_load(fs_inst
*inst
, struct brw_reg dst
);
296 void generate_mov_dispatch_to_flags();
298 void emit_dummy_fs();
299 fs_reg
*emit_fragcoord_interpolation(ir_variable
*ir
);
300 fs_inst
*emit_linterp(const fs_reg
&attr
, const fs_reg
&interp
,
301 glsl_interp_qualifier interpolation_mode
,
303 fs_reg
*emit_frontfacing_interpolation(ir_variable
*ir
);
304 fs_reg
*emit_general_interpolation(ir_variable
*ir
);
305 void emit_interpolation_setup_gen4();
306 void emit_interpolation_setup_gen6();
307 fs_inst
*emit_texture_gen4(ir_texture
*ir
, fs_reg dst
, fs_reg coordinate
,
309 fs_inst
*emit_texture_gen5(ir_texture
*ir
, fs_reg dst
, fs_reg coordinate
,
311 fs_inst
*emit_texture_gen7(ir_texture
*ir
, fs_reg dst
, fs_reg coordinate
,
313 fs_inst
*emit_math(enum opcode op
, fs_reg dst
, fs_reg src0
);
314 fs_inst
*emit_math(enum opcode op
, fs_reg dst
, fs_reg src0
, fs_reg src1
);
315 bool try_emit_saturate(ir_expression
*ir
);
316 bool try_emit_mad(ir_expression
*ir
, int mul_arg
);
317 void emit_bool_to_cond_code(ir_rvalue
*condition
);
318 void emit_if_gen6(ir_if
*ir
);
319 void emit_unspill(fs_inst
*inst
, fs_reg reg
, uint32_t spill_offset
);
321 void emit_color_write(int target
, int index
, int first_color_mrf
);
322 void emit_fb_writes();
323 bool try_rewrite_rhs_to_dst(ir_assignment
*ir
,
326 fs_inst
*pre_rhs_inst
,
327 fs_inst
*last_rhs_inst
);
328 void emit_assignment_writes(fs_reg
&l
, fs_reg
&r
,
329 const glsl_type
*type
, bool predicated
);
330 void resolve_ud_negate(fs_reg
*reg
);
331 void resolve_bool_comparison(ir_rvalue
*rvalue
, fs_reg
*reg
);
333 struct brw_reg
interp_reg(int location
, int channel
);
334 int setup_uniform_values(int loc
, const glsl_type
*type
);
335 void setup_builtin_uniform_values(ir_variable
*ir
);
336 int implied_mrf_writes(fs_inst
*inst
);
338 struct brw_context
*brw
;
339 const struct gl_fragment_program
*fp
;
340 struct intel_context
*intel
;
341 struct gl_context
*ctx
;
342 struct brw_wm_compile
*c
;
343 struct brw_compile
*p
;
344 struct brw_shader
*shader
;
345 struct gl_shader_program
*prog
;
347 exec_list instructions
;
349 /* Delayed setup of c->prog_data.params[] due to realloc of
350 * ParamValues[] during compile.
352 int param_index
[MAX_UNIFORMS
* 4];
353 int param_offset
[MAX_UNIFORMS
* 4];
355 int *virtual_grf_sizes
;
356 int virtual_grf_count
;
357 int virtual_grf_array_size
;
358 int *virtual_grf_def
;
359 int *virtual_grf_use
;
360 bool live_intervals_valid
;
362 /* This is the map from UNIFORM hw_reg + reg_offset as generated by
363 * the visitor to the packed uniform number after
364 * remove_dead_constants() that represents the actual uploaded
369 struct hash_table
*variable_ht
;
370 ir_variable
*frag_depth
;
371 fs_reg outputs
[BRW_MAX_DRAW_BUFFERS
];
372 unsigned output_components
[BRW_MAX_DRAW_BUFFERS
];
373 fs_reg dual_src_output
;
374 int first_non_payload_grf
;
376 int urb_setup
[FRAG_ATTRIB_MAX
];
378 /** @{ debug annotation info */
379 const char *current_annotation
;
380 ir_instruction
*base_ir
;
386 /* Result of last visit() method. */
393 fs_reg delta_x
[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT
];
394 fs_reg delta_y
[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT
];
399 int force_uncompressed_stack
;
400 int force_sechalf_stack
;
402 class fs_bblock
*bblock
;
405 bool brw_do_channel_expressions(struct exec_list
*instructions
);
406 bool brw_do_vector_splitting(struct exec_list
*instructions
);
407 bool brw_fs_precompile(struct gl_context
*ctx
, struct gl_shader_program
*prog
);