/* * Copyright © 2010 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Authors: * Eric Anholt * */ #pragma once #include "brw_shader.h" #include "brw_ir_fs.h" #include "brw_fs_builder.h" #include "compiler/glsl/ir.h" #include "compiler/nir/nir.h" struct bblock_t; namespace { struct acp_entry; } namespace brw { class fs_live_variables; } struct brw_gs_compile; static inline fs_reg offset(fs_reg reg, const brw::fs_builder& bld, unsigned delta) { switch (reg.file) { case BAD_FILE: break; case ARF: case FIXED_GRF: case MRF: case VGRF: case ATTR: return byte_offset(reg, delta * reg.component_size(bld.dispatch_width())); case UNIFORM: reg.reg_offset += delta; break; case IMM: assert(delta == 0); } return reg; } /** * The fragment shader front-end. * * Translates either GLSL IR or Mesa IR (for ARB_fragment_program) into FS IR. */ class fs_visitor : public backend_shader { public: fs_visitor(const struct brw_compiler *compiler, void *log_data, void *mem_ctx, const void *key, struct brw_stage_prog_data *prog_data, struct gl_program *prog, const nir_shader *shader, unsigned dispatch_width, int shader_time_index, const struct brw_vue_map *input_vue_map = NULL); fs_visitor(const struct brw_compiler *compiler, void *log_data, void *mem_ctx, struct brw_gs_compile *gs_compile, struct brw_gs_prog_data *prog_data, const nir_shader *shader, int shader_time_index); void init(); ~fs_visitor(); fs_reg vgrf(const glsl_type *const type); void import_uniforms(fs_visitor *v); void setup_uniform_clipplane_values(gl_clip_plane *clip_planes); void compute_clip_distance(gl_clip_plane *clip_planes); fs_inst *get_instruction_generating_reg(fs_inst *start, fs_inst *end, const fs_reg ®); void VARYING_PULL_CONSTANT_LOAD(const brw::fs_builder &bld, const fs_reg &dst, const fs_reg &surf_index, const fs_reg &varying_offset, uint32_t const_offset); void DEP_RESOLVE_MOV(const brw::fs_builder &bld, int grf); bool run_fs(bool do_rep_send); bool run_vs(gl_clip_plane *clip_planes); bool run_tcs_single_patch(); bool run_tes(); bool run_gs(); bool run_cs(); void optimize(); void allocate_registers(); void setup_fs_payload_gen4(); void setup_fs_payload_gen6(); void setup_vs_payload(); void setup_gs_payload(); void setup_cs_payload(); void fixup_3src_null_dest(); void assign_curb_setup(); void calculate_urb_setup(); void assign_urb_setup(); void convert_attr_sources_to_hw_regs(fs_inst *inst); void assign_vs_urb_setup(); void assign_tcs_single_patch_urb_setup(); void assign_tes_urb_setup(); void assign_gs_urb_setup(); bool assign_regs(bool allow_spilling); void assign_regs_trivial(); void calculate_payload_ranges(int payload_node_count, int *payload_last_use_ip); void setup_payload_interference(struct ra_graph *g, int payload_reg_count, int first_payload_node); int choose_spill_reg(struct ra_graph *g); void spill_reg(int spill_reg); void split_virtual_grfs(); bool compact_virtual_grfs(); void assign_constant_locations(); void lower_constant_loads(); void invalidate_live_intervals(); void calculate_live_intervals(); void calculate_register_pressure(); void validate(); bool opt_algebraic(); bool opt_redundant_discard_jumps(); bool opt_cse(); bool opt_cse_local(bblock_t *block); bool opt_copy_propagate(); bool try_copy_propagate(fs_inst *inst, int arg, acp_entry *entry); bool try_constant_propagate(fs_inst *inst, acp_entry *entry); bool opt_copy_propagate_local(void *mem_ctx, bblock_t *block, exec_list *acp); bool opt_drop_redundant_mov_to_flags(); bool opt_register_renaming(); bool register_coalesce(); bool compute_to_mrf(); bool eliminate_find_live_channel(); bool dead_code_eliminate(); bool remove_duplicate_mrf_writes(); bool opt_sampler_eot(); bool virtual_grf_interferes(int a, int b); void schedule_instructions(instruction_scheduler_mode mode); void insert_gen4_send_dependency_workarounds(); void insert_gen4_pre_send_dependency_workarounds(bblock_t *block, fs_inst *inst); void insert_gen4_post_send_dependency_workarounds(bblock_t *block, fs_inst *inst); void vfail(const char *msg, va_list args); void fail(const char *msg, ...); void no16(const char *msg); void lower_uniform_pull_constant_loads(); bool lower_load_payload(); bool lower_logical_sends(); bool lower_integer_multiplication(); bool lower_minmax(); bool lower_simd_width(); bool opt_combine_constants(); void emit_dummy_fs(); void emit_repclear_shader(); fs_reg *emit_fragcoord_interpolation(bool pixel_center_integer, bool origin_upper_left); fs_inst *emit_linterp(const fs_reg &attr, const fs_reg &interp, glsl_interp_qualifier interpolation_mode, bool is_centroid, bool is_sample); fs_reg *emit_frontfacing_interpolation(); fs_reg *emit_samplepos_setup(); fs_reg *emit_sampleid_setup(); fs_reg *emit_samplemaskin_setup(); void emit_general_interpolation(fs_reg *attr, const char *name, const glsl_type *type, glsl_interp_qualifier interpolation_mode, int *location, bool mod_centroid, bool mod_sample); fs_reg *emit_vs_system_value(int location); void emit_interpolation_setup_gen4(); void emit_interpolation_setup_gen6(); void compute_sample_position(fs_reg dst, fs_reg int_sample_pos); void emit_texture(ir_texture_opcode op, const glsl_type *dest_type, fs_reg coordinate, int components, fs_reg shadow_c, fs_reg lod, fs_reg dpdy, int grad_components, fs_reg sample_index, fs_reg offset, fs_reg mcs, int gather_component, bool is_cube_array, uint32_t surface, fs_reg surface_reg, uint32_t sampler, fs_reg sampler_reg, unsigned return_channels); fs_reg emit_mcs_fetch(const fs_reg &coordinate, unsigned components, const fs_reg &sampler); void emit_gen6_gather_wa(uint8_t wa, fs_reg dst); fs_reg resolve_source_modifiers(const fs_reg &src); void emit_discard_jump(); bool opt_peephole_sel(); bool opt_peephole_predicated_break(); bool opt_saturate_propagation(); bool opt_cmod_propagation(); bool opt_zero_samples(); void emit_unspill(bblock_t *block, fs_inst *inst, fs_reg reg, uint32_t spill_offset, int count); void emit_spill(bblock_t *block, fs_inst *inst, fs_reg reg, uint32_t spill_offset, int count); void emit_nir_code(); void nir_setup_inputs(); void nir_setup_single_output_varying(fs_reg *reg, const glsl_type *type, unsigned *location); void nir_setup_outputs(); void nir_setup_uniforms(); void nir_emit_system_values(); void nir_emit_impl(nir_function_impl *impl); void nir_emit_cf_list(exec_list *list); void nir_emit_if(nir_if *if_stmt); void nir_emit_loop(nir_loop *loop); void nir_emit_block(nir_block *block); void nir_emit_instr(nir_instr *instr); void nir_emit_alu(const brw::fs_builder &bld, nir_alu_instr *instr); void nir_emit_load_const(const brw::fs_builder &bld, nir_load_const_instr *instr); void nir_emit_undef(const brw::fs_builder &bld, nir_ssa_undef_instr *instr); void nir_emit_vs_intrinsic(const brw::fs_builder &bld, nir_intrinsic_instr *instr); void nir_emit_tcs_intrinsic(const brw::fs_builder &bld, nir_intrinsic_instr *instr); void nir_emit_gs_intrinsic(const brw::fs_builder &bld, nir_intrinsic_instr *instr); void nir_emit_fs_intrinsic(const brw::fs_builder &bld, nir_intrinsic_instr *instr); void nir_emit_cs_intrinsic(const brw::fs_builder &bld, nir_intrinsic_instr *instr); void nir_emit_intrinsic(const brw::fs_builder &bld, nir_intrinsic_instr *instr); void nir_emit_tes_intrinsic(const brw::fs_builder &bld, nir_intrinsic_instr *instr); void nir_emit_ssbo_atomic(const brw::fs_builder &bld, int op, nir_intrinsic_instr *instr); void nir_emit_shared_atomic(const brw::fs_builder &bld, int op, nir_intrinsic_instr *instr); void nir_emit_texture(const brw::fs_builder &bld, nir_tex_instr *instr); void nir_emit_jump(const brw::fs_builder &bld, nir_jump_instr *instr); fs_reg get_nir_src(nir_src src); fs_reg get_nir_dest(nir_dest dest); fs_reg get_nir_image_deref(const nir_deref_var *deref); fs_reg get_indirect_offset(nir_intrinsic_instr *instr); void emit_percomp(const brw::fs_builder &bld, const fs_inst &inst, unsigned wr_mask); bool optimize_extract_to_float(nir_alu_instr *instr, const fs_reg &result); bool optimize_frontfacing_ternary(nir_alu_instr *instr, const fs_reg &result); void emit_alpha_test(); fs_inst *emit_single_fb_write(const brw::fs_builder &bld, fs_reg color1, fs_reg color2, fs_reg src0_alpha, unsigned components); void emit_fb_writes(); void emit_urb_writes(const fs_reg &gs_vertex_count = fs_reg()); void set_gs_stream_control_data_bits(const fs_reg &vertex_count, unsigned stream_id); void emit_gs_control_data_bits(const fs_reg &vertex_count); void emit_gs_end_primitive(const nir_src &vertex_count_nir_src); void emit_gs_vertex(const nir_src &vertex_count_nir_src, unsigned stream_id); void emit_gs_thread_end(); void emit_gs_input_load(const fs_reg &dst, const nir_src &vertex_src, unsigned base_offset, const nir_src &offset_src, unsigned num_components); void emit_cs_terminate(); fs_reg *emit_cs_local_invocation_id_setup(); fs_reg *emit_cs_work_group_id_setup(); void emit_barrier(); void emit_shader_time_begin(); void emit_shader_time_end(); void SHADER_TIME_ADD(const brw::fs_builder &bld, int shader_time_subindex, fs_reg value); fs_reg get_timestamp(const brw::fs_builder &bld); struct brw_reg interp_reg(int location, int channel); int implied_mrf_writes(fs_inst *inst); virtual void dump_instructions(); virtual void dump_instructions(const char *name); void dump_instruction(backend_instruction *inst); void dump_instruction(backend_instruction *inst, FILE *file); const void *const key; const struct brw_sampler_prog_key_data *key_tex; struct brw_gs_compile *gs_compile; struct brw_stage_prog_data *prog_data; struct gl_program *prog; const struct brw_vue_map *input_vue_map; int *virtual_grf_start; int *virtual_grf_end; brw::fs_live_variables *live_intervals; int *regs_live_at_ip; /** Number of uniform variable components visited. */ unsigned uniforms; /** Byte-offset for the next available spot in the scratch space buffer. */ unsigned last_scratch; /** * Array mapping UNIFORM register numbers to the pull parameter index, * or -1 if this uniform register isn't being uploaded as a pull constant. */ int *pull_constant_loc; /** * Array mapping UNIFORM register numbers to the push parameter index, * or -1 if this uniform register isn't being uploaded as a push constant. */ int *push_constant_loc; fs_reg frag_depth; fs_reg frag_stencil; fs_reg sample_mask; fs_reg outputs[VARYING_SLOT_MAX]; unsigned output_components[VARYING_SLOT_MAX]; fs_reg dual_src_output; bool do_dual_src; int first_non_payload_grf; /** Either BRW_MAX_GRF or GEN7_MRF_HACK_START */ unsigned max_grf; fs_reg *nir_locals; fs_reg *nir_ssa_values; fs_reg nir_inputs; fs_reg nir_outputs; fs_reg *nir_system_values; bool failed; char *fail_msg; bool simd16_unsupported; char *no16_msg; /* Result of last visit() method. Still used by emit_texture() */ fs_reg result; /** Register numbers for thread payload fields. */ struct thread_payload { uint8_t source_depth_reg; uint8_t source_w_reg; uint8_t aa_dest_stencil_reg; uint8_t dest_depth_reg; uint8_t sample_pos_reg; uint8_t sample_mask_in_reg; uint8_t barycentric_coord_reg[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT]; uint8_t local_invocation_id_reg; /** The number of thread payload registers the hardware will supply. */ uint8_t num_regs; } payload; bool source_depth_to_render_target; bool runtime_check_aads_emit; fs_reg pixel_x; fs_reg pixel_y; fs_reg wpos_w; fs_reg pixel_w; fs_reg delta_xy[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT]; fs_reg shader_start_time; fs_reg userplane[MAX_CLIP_PLANES]; fs_reg final_gs_vertex_count; fs_reg control_data_bits; fs_reg invocation_id; unsigned grf_used; bool spilled_any_registers; const unsigned dispatch_width; /**< 8 or 16 */ unsigned min_dispatch_width; int shader_time_index; unsigned promoted_constants; brw::fs_builder bld; }; /** * The fragment shader code generator. * * Translates FS IR to actual i965 assembly code. */ class fs_generator { public: fs_generator(const struct brw_compiler *compiler, void *log_data, void *mem_ctx, const void *key, struct brw_stage_prog_data *prog_data, unsigned promoted_constants, bool runtime_check_aads_emit, gl_shader_stage stage); ~fs_generator(); void enable_debug(const char *shader_name); int generate_code(const cfg_t *cfg, int dispatch_width); const unsigned *get_assembly(unsigned int *assembly_size); private: void fire_fb_write(fs_inst *inst, struct brw_reg payload, struct brw_reg implied_header, GLuint nr); void generate_fb_write(fs_inst *inst, struct brw_reg payload); void generate_urb_read(fs_inst *inst, struct brw_reg dst, struct brw_reg payload); void generate_urb_write(fs_inst *inst, struct brw_reg payload); void generate_cs_terminate(fs_inst *inst, struct brw_reg payload); void generate_stencil_ref_packing(fs_inst *inst, struct brw_reg dst, struct brw_reg src); void generate_barrier(fs_inst *inst, struct brw_reg src); void generate_blorp_fb_write(fs_inst *inst, struct brw_reg payload); void generate_linterp(fs_inst *inst, struct brw_reg dst, struct brw_reg *src); void generate_tex(fs_inst *inst, struct brw_reg dst, struct brw_reg src, struct brw_reg surface_index, struct brw_reg sampler_index); void generate_get_buffer_size(fs_inst *inst, struct brw_reg dst, struct brw_reg src, struct brw_reg surf_index); void generate_math_gen6(fs_inst *inst, struct brw_reg dst, struct brw_reg src0, struct brw_reg src1); void generate_math_gen4(fs_inst *inst, struct brw_reg dst, struct brw_reg src); void generate_math_g45(fs_inst *inst, struct brw_reg dst, struct brw_reg src); void generate_ddx(enum opcode op, struct brw_reg dst, struct brw_reg src); void generate_ddy(enum opcode op, struct brw_reg dst, struct brw_reg src, bool negate_value); void generate_scratch_write(fs_inst *inst, struct brw_reg src); void generate_scratch_read(fs_inst *inst, struct brw_reg dst); void generate_scratch_read_gen7(fs_inst *inst, struct brw_reg dst); void generate_uniform_pull_constant_load(fs_inst *inst, struct brw_reg dst, struct brw_reg index, struct brw_reg offset); void generate_uniform_pull_constant_load_gen7(fs_inst *inst, struct brw_reg dst, struct brw_reg surf_index, struct brw_reg offset); void generate_varying_pull_constant_load(fs_inst *inst, struct brw_reg dst, struct brw_reg index, struct brw_reg offset); void generate_varying_pull_constant_load_gen7(fs_inst *inst, struct brw_reg dst, struct brw_reg index, struct brw_reg offset); void generate_mov_dispatch_to_flags(fs_inst *inst); void generate_pixel_interpolator_query(fs_inst *inst, struct brw_reg dst, struct brw_reg src, struct brw_reg msg_data, unsigned msg_type); void generate_set_sample_id(fs_inst *inst, struct brw_reg dst, struct brw_reg src0, struct brw_reg src1); void generate_set_simd4x2_offset(fs_inst *inst, struct brw_reg dst, struct brw_reg offset); void generate_discard_jump(fs_inst *inst); void generate_pack_half_2x16_split(fs_inst *inst, struct brw_reg dst, struct brw_reg x, struct brw_reg y); void generate_unpack_half_2x16_split(fs_inst *inst, struct brw_reg dst, struct brw_reg src); void generate_shader_time_add(fs_inst *inst, struct brw_reg payload, struct brw_reg offset, struct brw_reg value); void generate_mov_indirect(fs_inst *inst, struct brw_reg dst, struct brw_reg reg, struct brw_reg indirect_byte_offset); bool patch_discard_jumps_to_fb_writes(); const struct brw_compiler *compiler; void *log_data; /* Passed to compiler->*_log functions */ const struct brw_device_info *devinfo; struct brw_codegen *p; const void * const key; struct brw_stage_prog_data * const prog_data; unsigned dispatch_width; /**< 8 or 16 */ exec_list discard_halt_patches; unsigned promoted_constants; bool runtime_check_aads_emit; bool debug_flag; const char *shader_name; gl_shader_stage stage; void *mem_ctx; }; bool brw_do_channel_expressions(struct exec_list *instructions); bool brw_do_vector_splitting(struct exec_list *instructions);