/* * 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" extern "C" { #include #include "main/macros.h" #include "main/shaderobj.h" #include "main/uniforms.h" #include "program/prog_parameter.h" #include "program/prog_print.h" #include "program/prog_optimize.h" #include "program/register_allocate.h" #include "program/sampler.h" #include "program/hash_table.h" #include "brw_context.h" #include "brw_eu.h" #include "brw_wm.h" #include "brw_shader.h" } #include "gen8_generator.h" #include "glsl/glsl_types.h" #include "glsl/ir.h" #define MAX_SAMPLER_MESSAGE_SIZE 11 class bblock_t; namespace { struct acp_entry; } namespace brw { class fs_live_variables; } class fs_reg { public: DECLARE_RALLOC_CXX_OPERATORS(fs_reg) void init(); fs_reg(); fs_reg(float f); fs_reg(int32_t i); fs_reg(uint32_t u); fs_reg(struct brw_reg fixed_hw_reg); fs_reg(enum register_file file, int reg); fs_reg(enum register_file file, int reg, uint32_t type); fs_reg(class fs_visitor *v, const struct glsl_type *type); bool equals(const fs_reg &r) const; bool is_zero() const; bool is_one() const; bool is_null() const; bool is_valid_3src() const; bool is_contiguous() const; fs_reg &apply_stride(unsigned stride); /** Register file: GRF, MRF, IMM. */ enum register_file file; /** * Register number. For MRF, it's the hardware register. For * GRF, it's a virtual register number until register allocation */ int reg; /** * Offset from the start of the contiguous register block. * * For pre-register-allocation GRFs, this is in units of a float per pixel * (1 hardware register for SIMD8 mode, or 2 registers for SIMD16 mode). * For uniforms, this is in units of 1 float. */ int reg_offset; /** Register type. BRW_REGISTER_TYPE_* */ int type; bool negate; bool abs; struct brw_reg fixed_hw_reg; /** Smear a channel of the reg to all channels. */ fs_reg &set_smear(unsigned subreg); /** Value for file == IMM */ union { int32_t i; uint32_t u; float f; } imm; /** * Offset in bytes from the start of the register. Values up to a * backend_reg::reg_offset unit are valid. */ int subreg_offset; /** Register region horizontal stride */ int stride; fs_reg *reladdr; }; static inline fs_reg retype(fs_reg reg, unsigned type) { reg.fixed_hw_reg.type = reg.type = type; return reg; } static inline fs_reg offset(fs_reg reg, unsigned delta) { assert(delta == 0 || (reg.file != HW_REG && reg.file != IMM)); reg.reg_offset += delta; return reg; } static inline fs_reg byte_offset(fs_reg reg, unsigned delta) { assert(delta == 0 || (reg.file != HW_REG && reg.file != IMM)); reg.subreg_offset += delta; return reg; } /** * Get either of the 8-component halves of a 16-component register. * * Note: this also works if \c reg represents a SIMD16 pair of registers. */ static inline fs_reg half(const fs_reg ®, unsigned idx) { assert(idx < 2); assert(idx == 0 || (reg.file != HW_REG && reg.file != IMM)); return byte_offset(reg, 8 * idx * reg.stride * type_sz(reg.type)); } static const fs_reg reg_undef; static const fs_reg reg_null_f(retype(brw_null_reg(), BRW_REGISTER_TYPE_F)); static const fs_reg reg_null_d(retype(brw_null_reg(), BRW_REGISTER_TYPE_D)); static const fs_reg reg_null_ud(retype(brw_null_reg(), BRW_REGISTER_TYPE_UD)); class ip_record : public exec_node { public: DECLARE_RALLOC_CXX_OPERATORS(ip_record) ip_record(int ip) { this->ip = ip; } int ip; }; class fs_inst : public backend_instruction { public: DECLARE_RALLOC_CXX_OPERATORS(fs_inst) void init(); fs_inst(); fs_inst(enum opcode opcode); fs_inst(enum opcode opcode, fs_reg dst); fs_inst(enum opcode opcode, fs_reg dst, fs_reg src0); fs_inst(enum opcode opcode, fs_reg dst, fs_reg src0, fs_reg src1); fs_inst(enum opcode opcode, fs_reg dst, fs_reg src0, fs_reg src1,fs_reg src2); bool equals(fs_inst *inst); bool overwrites_reg(const fs_reg ®); bool is_send_from_grf(); bool is_partial_write(); int regs_read(fs_visitor *v, int arg); bool reads_flag(); bool writes_flag(); fs_reg dst; fs_reg src[3]; bool saturate; int conditional_mod; /**< BRW_CONDITIONAL_* */ /* Chooses which flag subregister (f0.0 or f0.1) is used for conditional * mod and predication. */ uint8_t flag_subreg; int mlen; /**< SEND message length */ int regs_written; /**< Number of vgrfs written by a SEND message, or 1 */ int base_mrf; /**< First MRF in the SEND message, if mlen is nonzero. */ uint32_t texture_offset; /**< Texture offset bitfield */ int sampler; int target; /**< MRT target. */ bool eot; bool header_present; bool shadow_compare; bool force_uncompressed; bool force_sechalf; bool force_writemask_all; uint32_t offset; /* spill/unspill offset */ /** @{ * Annotation for the generated IR. One of the two can be set. */ const void *ir; const char *annotation; /** @} */ }; /** * The fragment shader front-end. * * Translates either GLSL IR or Mesa IR (for ARB_fragment_program) into FS IR. */ class fs_visitor : public backend_visitor { public: fs_visitor(struct brw_context *brw, struct brw_wm_compile *c, struct gl_shader_program *shader_prog, struct gl_fragment_program *fp, unsigned dispatch_width); ~fs_visitor(); fs_reg *variable_storage(ir_variable *var); int virtual_grf_alloc(int size); void import_uniforms(fs_visitor *v); void visit(ir_variable *ir); void visit(ir_assignment *ir); void visit(ir_dereference_variable *ir); void visit(ir_dereference_record *ir); void visit(ir_dereference_array *ir); void visit(ir_expression *ir); void visit(ir_texture *ir); void visit(ir_if *ir); void visit(ir_constant *ir); void visit(ir_swizzle *ir); void visit(ir_return *ir); void visit(ir_loop *ir); void visit(ir_loop_jump *ir); void visit(ir_discard *ir); void visit(ir_call *ir); void visit(ir_function *ir); void visit(ir_function_signature *ir); void visit(ir_emit_vertex *); void visit(ir_end_primitive *); uint32_t gather_channel(ir_texture *ir, int sampler); void swizzle_result(ir_texture *ir, fs_reg orig_val, int sampler); bool can_do_source_mods(fs_inst *inst); fs_inst *emit(fs_inst inst); fs_inst *emit(fs_inst *inst); void emit(exec_list list); fs_inst *emit(enum opcode opcode); fs_inst *emit(enum opcode opcode, fs_reg dst); fs_inst *emit(enum opcode opcode, fs_reg dst, fs_reg src0); fs_inst *emit(enum opcode opcode, fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *emit(enum opcode opcode, fs_reg dst, fs_reg src0, fs_reg src1, fs_reg src2); fs_inst *MOV(fs_reg dst, fs_reg src); fs_inst *NOT(fs_reg dst, fs_reg src); fs_inst *RNDD(fs_reg dst, fs_reg src); fs_inst *RNDE(fs_reg dst, fs_reg src); fs_inst *RNDZ(fs_reg dst, fs_reg src); fs_inst *FRC(fs_reg dst, fs_reg src); fs_inst *ADD(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *MUL(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *MACH(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *MAC(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *SHL(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *SHR(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *ASR(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *AND(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *OR(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *XOR(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *IF(uint32_t predicate); fs_inst *IF(fs_reg src0, fs_reg src1, uint32_t condition); fs_inst *CMP(fs_reg dst, fs_reg src0, fs_reg src1, uint32_t condition); fs_inst *LRP(fs_reg dst, fs_reg a, fs_reg y, fs_reg x); fs_inst *DEP_RESOLVE_MOV(int grf); fs_inst *BFREV(fs_reg dst, fs_reg value); fs_inst *BFE(fs_reg dst, fs_reg bits, fs_reg offset, fs_reg value); fs_inst *BFI1(fs_reg dst, fs_reg bits, fs_reg offset); fs_inst *BFI2(fs_reg dst, fs_reg bfi1_dst, fs_reg insert, fs_reg base); fs_inst *FBH(fs_reg dst, fs_reg value); fs_inst *FBL(fs_reg dst, fs_reg value); fs_inst *CBIT(fs_reg dst, fs_reg value); fs_inst *MAD(fs_reg dst, fs_reg c, fs_reg b, fs_reg a); fs_inst *ADDC(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *SUBB(fs_reg dst, fs_reg src0, fs_reg src1); fs_inst *SEL(fs_reg dst, fs_reg src0, fs_reg src1); int type_size(const struct glsl_type *type); fs_inst *get_instruction_generating_reg(fs_inst *start, fs_inst *end, fs_reg reg); exec_list VARYING_PULL_CONSTANT_LOAD(fs_reg dst, fs_reg surf_index, fs_reg varying_offset, uint32_t const_offset); bool run(); void assign_binding_table_offsets(); void setup_payload_gen4(); void setup_payload_gen6(); void assign_curb_setup(); void calculate_urb_setup(); void assign_urb_setup(); bool assign_regs(bool allow_spilling); void assign_regs_trivial(); void get_used_mrfs(bool *mrf_used); void setup_payload_interference(struct ra_graph *g, int payload_reg_count, int first_payload_node); void setup_mrf_hack_interference(struct ra_graph *g, int first_mrf_hack_node); int choose_spill_reg(struct ra_graph *g); void spill_reg(int spill_reg); void split_virtual_grfs(); void compact_virtual_grfs(); void move_uniform_array_access_to_pull_constants(); void setup_pull_constants(); void invalidate_live_intervals(); void calculate_live_intervals(); void calculate_register_pressure(); bool opt_algebraic(); bool opt_cse(); bool opt_cse_local(bblock_t *block, exec_list *aeb); 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 register_coalesce(); bool compute_to_mrf(); bool dead_code_eliminate(); bool dead_code_eliminate_local(); bool remove_dead_constants(); bool remove_duplicate_mrf_writes(); 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(fs_inst *inst); void insert_gen4_post_send_dependency_workarounds(fs_inst *inst); void fail(const char *msg, ...); void lower_uniform_pull_constant_loads(); void push_force_uncompressed(); void pop_force_uncompressed(); void emit_dummy_fs(); fs_reg *emit_fragcoord_interpolation(ir_variable *ir); 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(ir_variable *ir); fs_reg *emit_samplepos_setup(ir_variable *ir); fs_reg *emit_sampleid_setup(ir_variable *ir); fs_reg *emit_samplemaskin_setup(ir_variable *ir); fs_reg *emit_general_interpolation(ir_variable *ir); void emit_interpolation_setup_gen4(); void emit_interpolation_setup_gen6(); void compute_sample_position(fs_reg dst, fs_reg int_sample_pos); fs_reg rescale_texcoord(ir_texture *ir, fs_reg coordinate, bool is_rect, int sampler, int texunit); fs_inst *emit_texture_gen4(ir_texture *ir, fs_reg dst, fs_reg coordinate, fs_reg shadow_comp, fs_reg lod, fs_reg lod2); fs_inst *emit_texture_gen5(ir_texture *ir, fs_reg dst, fs_reg coordinate, fs_reg shadow_comp, fs_reg lod, fs_reg lod2, fs_reg sample_index); fs_inst *emit_texture_gen7(ir_texture *ir, fs_reg dst, fs_reg coordinate, fs_reg shadow_comp, fs_reg lod, fs_reg lod2, fs_reg sample_index, fs_reg mcs, int sampler); fs_reg emit_mcs_fetch(ir_texture *ir, fs_reg coordinate, int sampler); void emit_gen6_gather_wa(uint8_t wa, fs_reg dst); fs_reg fix_math_operand(fs_reg src); fs_inst *emit_math(enum opcode op, fs_reg dst, fs_reg src0); fs_inst *emit_math(enum opcode op, fs_reg dst, fs_reg src0, fs_reg src1); void emit_lrp(fs_reg dst, fs_reg x, fs_reg y, fs_reg a); void emit_minmax(uint32_t conditionalmod, fs_reg dst, fs_reg src0, fs_reg src1); bool try_emit_saturate(ir_expression *ir); bool try_emit_mad(ir_expression *ir, int mul_arg); void try_replace_with_sel(); bool opt_peephole_sel(); bool opt_peephole_predicated_break(); bool opt_saturate_propagation(); void emit_bool_to_cond_code(ir_rvalue *condition); void emit_if_gen6(ir_if *ir); void emit_unspill(fs_inst *inst, fs_reg reg, uint32_t spill_offset, int count); void emit_fragment_program_code(); void setup_fp_regs(); fs_reg get_fp_src_reg(const prog_src_register *src); fs_reg get_fp_dst_reg(const prog_dst_register *dst); void emit_fp_alu1(enum opcode opcode, const struct prog_instruction *fpi, fs_reg dst, fs_reg src); void emit_fp_alu2(enum opcode opcode, const struct prog_instruction *fpi, fs_reg dst, fs_reg src0, fs_reg src1); void emit_fp_scalar_write(const struct prog_instruction *fpi, fs_reg dst, fs_reg src); void emit_fp_scalar_math(enum opcode opcode, const struct prog_instruction *fpi, fs_reg dst, fs_reg src); void emit_fp_minmax(const struct prog_instruction *fpi, fs_reg dst, fs_reg src0, fs_reg src1); void emit_fp_sop(uint32_t conditional_mod, const struct prog_instruction *fpi, fs_reg dst, fs_reg src0, fs_reg src1, fs_reg one); void emit_color_write(int target, int index, int first_color_mrf); void emit_alpha_test(); void emit_fb_writes(); void emit_shader_time_begin(); void emit_shader_time_end(); void emit_shader_time_write(enum shader_time_shader_type type, fs_reg value); void emit_untyped_atomic(unsigned atomic_op, unsigned surf_index, fs_reg dst, fs_reg offset, fs_reg src0, fs_reg src1); void emit_untyped_surface_read(unsigned surf_index, fs_reg dst, fs_reg offset); bool try_rewrite_rhs_to_dst(ir_assignment *ir, fs_reg dst, fs_reg src, fs_inst *pre_rhs_inst, fs_inst *last_rhs_inst); void emit_assignment_writes(fs_reg &l, fs_reg &r, const glsl_type *type, bool predicated); void resolve_ud_negate(fs_reg *reg); void resolve_bool_comparison(ir_rvalue *rvalue, fs_reg *reg); fs_reg get_timestamp(); struct brw_reg interp_reg(int location, int channel); void setup_uniform_values(ir_variable *ir); void setup_builtin_uniform_values(ir_variable *ir); int implied_mrf_writes(fs_inst *inst); virtual void dump_instructions(); void dump_instruction(backend_instruction *inst); void visit_atomic_counter_intrinsic(ir_call *ir); struct gl_fragment_program *fp; struct brw_wm_compile *c; unsigned int sanity_param_count; int param_size[MAX_UNIFORMS * 4]; int *virtual_grf_sizes; int virtual_grf_count; int virtual_grf_array_size; int *virtual_grf_start; int *virtual_grf_end; brw::fs_live_variables *live_intervals; int *regs_live_at_ip; /* This is the map from UNIFORM hw_reg + reg_offset as generated by * the visitor to the packed uniform number after * remove_dead_constants() that represents the actual uploaded * uniform index. */ int *params_remap; int nr_params_remap; struct hash_table *variable_ht; fs_reg frag_depth; fs_reg sample_mask; fs_reg outputs[BRW_MAX_DRAW_BUFFERS]; unsigned output_components[BRW_MAX_DRAW_BUFFERS]; fs_reg dual_src_output; int first_non_payload_grf; /** Either BRW_MAX_GRF or GEN7_MRF_HACK_START */ int max_grf; fs_reg *fp_temp_regs; fs_reg *fp_input_regs; /** @{ debug annotation info */ const char *current_annotation; const void *base_ir; /** @} */ bool failed; char *fail_msg; /* Result of last visit() method. */ fs_reg result; fs_reg pixel_x; fs_reg pixel_y; fs_reg wpos_w; fs_reg pixel_w; fs_reg delta_x[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT]; fs_reg delta_y[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT]; fs_reg shader_start_time; int grf_used; bool spilled_any_registers; const unsigned dispatch_width; /**< 8 or 16 */ int force_uncompressed_stack; }; /** * The fragment shader code generator. * * Translates FS IR to actual i965 assembly code. */ class fs_generator { public: fs_generator(struct brw_context *brw, struct brw_wm_compile *c, struct gl_shader_program *prog, struct gl_fragment_program *fp, bool dual_source_output); ~fs_generator(); const unsigned *generate_assembly(exec_list *simd8_instructions, exec_list *simd16_instructions, unsigned *assembly_size, FILE *dump_file = NULL); private: void generate_code(exec_list *instructions, FILE *dump_file); void generate_fb_write(fs_inst *inst); void generate_blorp_fb_write(fs_inst *inst); void generate_pixel_xy(struct brw_reg dst, bool is_x); 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); void generate_math1_gen7(fs_inst *inst, struct brw_reg dst, struct brw_reg src); void generate_math2_gen7(fs_inst *inst, struct brw_reg dst, struct brw_reg src0, struct brw_reg src1); void generate_math1_gen6(fs_inst *inst, struct brw_reg dst, struct brw_reg src); void generate_math2_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(fs_inst *inst, struct brw_reg dst, struct brw_reg src); void generate_ddy(fs_inst *inst, 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_set_omask(fs_inst *inst, struct brw_reg dst, struct brw_reg sample_mask); 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_untyped_atomic(fs_inst *inst, struct brw_reg dst, struct brw_reg atomic_op, struct brw_reg surf_index); void generate_untyped_surface_read(fs_inst *inst, struct brw_reg dst, struct brw_reg surf_index); void patch_discard_jumps_to_fb_writes(); struct brw_context *brw; struct gl_context *ctx; struct brw_compile *p; struct brw_wm_compile *c; struct gl_shader_program *prog; const struct gl_fragment_program *fp; unsigned dispatch_width; /**< 8 or 16 */ exec_list discard_halt_patches; bool dual_source_output; void *mem_ctx; }; /** * The fragment shader code generator. * * Translates FS IR to actual i965 assembly code. */ class gen8_fs_generator : public gen8_generator { public: gen8_fs_generator(struct brw_context *brw, struct brw_wm_compile *c, struct gl_shader_program *prog, struct gl_fragment_program *fp, bool dual_source_output); ~gen8_fs_generator(); const unsigned *generate_assembly(exec_list *simd8_instructions, exec_list *simd16_instructions, unsigned *assembly_size); private: void generate_code(exec_list *instructions); void generate_fb_write(fs_inst *inst); 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); void generate_math1(fs_inst *inst, struct brw_reg dst, struct brw_reg src); void generate_math2(fs_inst *inst, struct brw_reg dst, struct brw_reg src0, struct brw_reg src1); void generate_ddx(fs_inst *inst, struct brw_reg dst, struct brw_reg src); void generate_ddy(fs_inst *inst, 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_varying_pull_constant_load(fs_inst *inst, struct brw_reg dst, struct brw_reg index, struct brw_reg offset); void generate_mov_dispatch_to_flags(fs_inst *ir); void generate_set_simd4x2_offset(fs_inst *ir, struct brw_reg dst, struct brw_reg offset); void generate_discard_jump(fs_inst *ir); void patch_discard_jumps_to_fb_writes(); void mark_surface_used(unsigned surf_index); struct brw_wm_compile *c; const struct gl_fragment_program *fp; unsigned dispatch_width; /** 8 or 16 */ bool dual_source_output; exec_list discard_halt_patches; }; bool brw_do_channel_expressions(struct exec_list *instructions); bool brw_do_vector_splitting(struct exec_list *instructions); bool brw_fs_precompile(struct gl_context *ctx, struct gl_shader_program *prog); struct brw_reg brw_reg_from_fs_reg(fs_reg *reg);