src/mesa/drivers/dri/i965/brw_shader.h

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   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:
  10  *
  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
  13  * Software.
  14  *
  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
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #pragma once
  25
  26 #include <stdint.h>
  27 #include "brw_reg.h"
  28 #include "brw_defines.h"
  29 #include "brw_context.h"
  30
  31 #ifdef __cplusplus
  32 #include "brw_ir_allocator.h"
  33 #endif
  34
  35 #define MAX_SAMPLER_MESSAGE_SIZE 11
  36 #define MAX_VGRF_SIZE 16
  37
  38 #ifdef __cplusplus
  39 struct backend_reg : private brw_reg
  40 {
  41    backend_reg() {}
  42    backend_reg(const struct brw_reg &reg) : brw_reg(reg) {}
  43
  44    const brw_reg &as_brw_reg() const
  45    {
  46       assert(file == ARF || file == FIXED_GRF || file == MRF || file == IMM);
  47       assert(reg_offset == 0);
  48       return static_cast<const brw_reg &>(*this);
  49    }
  50
  51    brw_reg &as_brw_reg()
  52    {
  53       assert(file == ARF || file == FIXED_GRF || file == MRF || file == IMM);
  54       assert(reg_offset == 0);
  55       return static_cast<brw_reg &>(*this);
  56    }
  57
  58    bool equals(const backend_reg &r) const;
  59
  60    bool is_zero() const;
  61    bool is_one() const;
  62    bool is_negative_one() const;
  63    bool is_null() const;
  64    bool is_accumulator() const;
  65    bool in_range(const backend_reg &r, unsigned n) const;
  66
  67    /**
  68     * Offset within the virtual register.
  69     *
  70     * In the scalar backend, this is in units of a float per pixel for pre-
  71     * register allocation registers (i.e., one register in SIMD8 mode and two
  72     * registers in SIMD16 mode).
  73     *
  74     * For uniforms, this is in units of 1 float.
  75     */
  76    uint16_t reg_offset;
  77
  78    using brw_reg::type;
  79    using brw_reg::file;
  80    using brw_reg::negate;
  81    using brw_reg::abs;
  82    using brw_reg::address_mode;
  83    using brw_reg::subnr;
  84    using brw_reg::nr;
  85
  86    using brw_reg::swizzle;
  87    using brw_reg::writemask;
  88    using brw_reg::indirect_offset;
  89    using brw_reg::vstride;
  90    using brw_reg::width;
  91    using brw_reg::hstride;
  92
  93    using brw_reg::f;
  94    using brw_reg::d;
  95    using brw_reg::ud;
  96 };
  97 #endif
  98
  99 struct cfg_t;
 100 struct bblock_t;
 101
 102 #ifdef __cplusplus
 103 struct backend_instruction : public exec_node {
 104    bool is_3src() const;
 105    bool is_tex() const;
 106    bool is_math() const;
 107    bool is_control_flow() const;
 108    bool is_commutative() const;
 109    bool can_do_source_mods() const;
 110    bool can_do_saturate() const;
 111    bool can_do_cmod() const;
 112    bool reads_accumulator_implicitly() const;
 113    bool writes_accumulator_implicitly(const struct brw_device_info *devinfo) const;
 114
 115    void remove(bblock_t *block);
 116    void insert_after(bblock_t *block, backend_instruction *inst);
 117    void insert_before(bblock_t *block, backend_instruction *inst);
 118    void insert_before(bblock_t *block, exec_list *list);
 119
 120    /**
 121     * True if the instruction has side effects other than writing to
 122     * its destination registers.  You are expected not to reorder or
 123     * optimize these out unless you know what you are doing.
 124     */
 125    bool has_side_effects() const;
 126
 127    /**
 128     * True if the instruction might be affected by side effects of other
 129     * instructions.
 130     */
 131    bool is_volatile() const;
 132 #else
 133 struct backend_instruction {
 134    struct exec_node link;
 135 #endif
 136    /** @{
 137     * Annotation for the generated IR.  One of the two can be set.
 138     */
 139    const void *ir;
 140    const char *annotation;
 141    /** @} */
 142
 143    uint32_t offset; /**< spill/unspill offset or texture offset bitfield */
 144    uint8_t mlen; /**< SEND message length */
 145    int8_t base_mrf; /**< First MRF in the SEND message, if mlen is nonzero. */
 146    uint8_t target; /**< MRT target. */
 147    uint8_t regs_written; /**< Number of registers written by the instruction. */
 148
 149    enum opcode opcode; /* BRW_OPCODE_* or FS_OPCODE_* */
 150    enum brw_conditional_mod conditional_mod; /**< BRW_CONDITIONAL_* */
 151    enum brw_predicate predicate;
 152    bool predicate_inverse:1;
 153    bool writes_accumulator:1; /**< instruction implicitly writes accumulator */
 154    bool force_writemask_all:1;
 155    bool no_dd_clear:1;
 156    bool no_dd_check:1;
 157    bool saturate:1;
 158    bool shadow_compare:1;
 159
 160    /* Chooses which flag subregister (f0.0 or f0.1) is used for conditional
 161     * mod and predication.
 162     */
 163    unsigned flag_subreg:1;
 164
 165    /** The number of hardware registers used for a message header. */
 166    uint8_t header_size;
 167 };
 168
 169 #ifdef __cplusplus
 170
 171 enum instruction_scheduler_mode {
 172    SCHEDULE_PRE,
 173    SCHEDULE_PRE_NON_LIFO,
 174    SCHEDULE_PRE_LIFO,
 175    SCHEDULE_POST,
 176 };
 177
 178 struct backend_shader {
 179 protected:
 180
 181    backend_shader(const struct brw_compiler *compiler,
 182                   void *log_data,
 183                   void *mem_ctx,
 184                   const nir_shader *shader,
 185                   struct brw_stage_prog_data *stage_prog_data);
 186
 187 public:
 188
 189    const struct brw_compiler *compiler;
 190    void *log_data; /* Passed to compiler->*_log functions */
 191
 192    const struct brw_device_info * const devinfo;
 193    const nir_shader *nir;
 194    struct brw_stage_prog_data * const stage_prog_data;
 195
 196    /** ralloc context for temporary data used during compile */
 197    void *mem_ctx;
 198
 199    /**
 200     * List of either fs_inst or vec4_instruction (inheriting from
 201     * backend_instruction)
 202     */
 203    exec_list instructions;
 204
 205    cfg_t *cfg;
 206
 207    gl_shader_stage stage;
 208    bool debug_enabled;
 209    const char *stage_name;
 210    const char *stage_abbrev;
 211
 212    brw::simple_allocator alloc;
 213
 214    virtual void dump_instruction(backend_instruction *inst) = 0;
 215    virtual void dump_instruction(backend_instruction *inst, FILE *file) = 0;
 216    virtual void dump_instructions();
 217    virtual void dump_instructions(const char *name);
 218
 219    void calculate_cfg();
 220    void invalidate_cfg();
 221
 222    virtual void invalidate_live_intervals() = 0;
 223 };
 224
 225 uint32_t brw_texture_offset(int *offsets, unsigned num_components);
 226
 227 void brw_setup_image_uniform_values(gl_shader_stage stage,
 228                                     struct brw_stage_prog_data *stage_prog_data,
 229                                     unsigned param_start_index,
 230                                     const gl_uniform_storage *storage);
 231
 232 #else
 233 struct backend_shader;
 234 #endif /* __cplusplus */
 235
 236 enum brw_reg_type brw_type_for_base_type(const struct glsl_type *type);
 237 enum brw_conditional_mod brw_conditional_for_comparison(unsigned int op);
 238 uint32_t brw_math_function(enum opcode op);
 239 const char *brw_instruction_name(enum opcode op);
 240 bool brw_saturate_immediate(enum brw_reg_type type, struct brw_reg *reg);
 241 bool brw_negate_immediate(enum brw_reg_type type, struct brw_reg *reg);
 242 bool brw_abs_immediate(enum brw_reg_type type, struct brw_reg *reg);
 243
 244 bool opt_predicated_break(struct backend_shader *s);
 245
 246 #ifdef __cplusplus
 247 extern "C" {
 248 #endif
 249
 250 /**
 251  * Scratch data used when compiling a GLSL geometry shader.
 252  */
 253 struct brw_gs_compile
 254 {
 255    struct brw_gs_prog_key key;
 256    struct brw_vue_map input_vue_map;
 257
 258    unsigned control_data_bits_per_vertex;
 259    unsigned control_data_header_size_bits;
 260 };
 261
 262 void
 263 brw_assign_common_binding_table_offsets(gl_shader_stage stage,
 264                                         const struct brw_device_info *devinfo,
 265                                         const struct gl_shader_program *shader_prog,
 266                                         const struct gl_program *prog,
 267                                         struct brw_stage_prog_data *stage_prog_data,
 268                                         uint32_t next_binding_table_offset);
 269
 270 bool brw_vs_precompile(struct gl_context *ctx,
 271                        struct gl_shader_program *shader_prog,
 272                        struct gl_program *prog);
 273 bool brw_gs_precompile(struct gl_context *ctx,
 274                        struct gl_shader_program *shader_prog,
 275                        struct gl_program *prog);
 276 bool brw_fs_precompile(struct gl_context *ctx,
 277                        struct gl_shader_program *shader_prog,
 278                        struct gl_program *prog);
 279 bool brw_cs_precompile(struct gl_context *ctx,
 280                        struct gl_shader_program *shader_prog,
 281                        struct gl_program *prog);
 282
 283 GLboolean brw_link_shader(struct gl_context *ctx, struct gl_shader_program *prog);
 284 struct gl_shader *brw_new_shader(struct gl_context *ctx, GLuint name, GLuint type);
 285
 286 int type_size_scalar(const struct glsl_type *type);
 287 int type_size_vec4(const struct glsl_type *type);
 288 int type_size_vec4_times_4(const struct glsl_type *type);
 289
 290 #ifdef __cplusplus
 291 }
 292 #endif