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 #include <stdint.h>
  25 #include "brw_reg.h"
  26 #include "brw_defines.h"
  27 #include "main/compiler.h"
  28 #include "glsl/ir.h"
  29
  30 #pragma once
  31
  32 enum PACKED register_file {
  33    BAD_FILE,
  34    GRF,
  35    MRF,
  36    IMM,
  37    HW_REG, /* a struct brw_reg */
  38    ATTR,
  39    UNIFORM, /* prog_data->params[reg] */
  40 };
  41
  42 struct backend_reg
  43 {
  44 #ifdef __cplusplus
  45    bool is_zero() const;
  46    bool is_one() const;
  47    bool is_null() const;
  48    bool is_accumulator() const;
  49 #endif
  50
  51    enum register_file file; /**< Register file: GRF, MRF, IMM. */
  52    enum brw_reg_type type;  /**< Register type: BRW_REGISTER_TYPE_* */
  53
  54    /**
  55     * Register number.
  56     *
  57     * For GRF, it's a virtual register number until register allocation.
  58     *
  59     * For MRF, it's the hardware register.
  60     */
  61    uint16_t reg;
  62
  63    /**
  64     * Offset within the virtual register.
  65     *
  66     * In the scalar backend, this is in units of a float per pixel for pre-
  67     * register allocation registers (i.e., one register in SIMD8 mode and two
  68     * registers in SIMD16 mode).
  69     *
  70     * For uniforms, this is in units of 1 float.
  71     */
  72    int reg_offset;
  73
  74    struct brw_reg fixed_hw_reg;
  75
  76    bool negate;
  77    bool abs;
  78 };
  79
  80 struct cfg_t;
  81 struct bblock_t;
  82
  83 #ifdef __cplusplus
  84 struct backend_instruction : public exec_node {
  85    bool is_tex() const;
  86    bool is_math() const;
  87    bool is_control_flow() const;
  88    bool can_do_source_mods() const;
  89    bool can_do_saturate() const;
  90    bool reads_accumulator_implicitly() const;
  91    bool writes_accumulator_implicitly(struct brw_context *brw) const;
  92
  93    using exec_node::remove;
  94    void remove(bblock_t *block);
  95
  96    /**
  97     * True if the instruction has side effects other than writing to
  98     * its destination registers.  You are expected not to reorder or
  99     * optimize these out unless you know what you are doing.
 100     */
 101    bool has_side_effects() const;
 102 #else
 103 struct backend_instruction {
 104    struct exec_node link;
 105 #endif
 106    /** @{
 107     * Annotation for the generated IR.  One of the two can be set.
 108     */
 109    const void *ir;
 110    const char *annotation;
 111    /** @} */
 112
 113    uint32_t texture_offset; /**< Texture offset bitfield */
 114    uint32_t offset; /**< spill/unspill offset */
 115    uint8_t mlen; /**< SEND message length */
 116    int8_t base_mrf; /**< First MRF in the SEND message, if mlen is nonzero. */
 117    uint8_t target; /**< MRT target. */
 118
 119    enum opcode opcode; /* BRW_OPCODE_* or FS_OPCODE_* */
 120    enum brw_conditional_mod conditional_mod; /**< BRW_CONDITIONAL_* */
 121    enum brw_predicate predicate;
 122    bool predicate_inverse:1;
 123    bool writes_accumulator:1; /**< instruction implicitly writes accumulator */
 124    bool force_writemask_all:1;
 125    bool no_dd_clear:1;
 126    bool no_dd_check:1;
 127    bool saturate:1;
 128 };
 129
 130 #ifdef __cplusplus
 131
 132 enum instruction_scheduler_mode {
 133    SCHEDULE_PRE,
 134    SCHEDULE_PRE_NON_LIFO,
 135    SCHEDULE_PRE_LIFO,
 136    SCHEDULE_POST,
 137 };
 138
 139 class backend_visitor : public ir_visitor {
 140 protected:
 141
 142    backend_visitor(struct brw_context *brw,
 143                    struct gl_shader_program *shader_prog,
 144                    struct gl_program *prog,
 145                    struct brw_stage_prog_data *stage_prog_data,
 146                    gl_shader_stage stage);
 147
 148 public:
 149
 150    struct brw_context * const brw;
 151    struct gl_context * const ctx;
 152    struct brw_shader * const shader;
 153    struct gl_shader_program * const shader_prog;
 154    struct gl_program * const prog;
 155    struct brw_stage_prog_data * const stage_prog_data;
 156
 157    /** ralloc context for temporary data used during compile */
 158    void *mem_ctx;
 159
 160    /**
 161     * List of either fs_inst or vec4_instruction (inheriting from
 162     * backend_instruction)
 163     */
 164    exec_list instructions;
 165
 166    cfg_t *cfg;
 167
 168    gl_shader_stage stage;
 169
 170    virtual void dump_instruction(backend_instruction *inst) = 0;
 171    virtual void dump_instruction(backend_instruction *inst, FILE *file) = 0;
 172    virtual void dump_instructions();
 173    virtual void dump_instructions(const char *name);
 174
 175    void calculate_cfg();
 176    void invalidate_cfg();
 177
 178    void assign_common_binding_table_offsets(uint32_t next_binding_table_offset);
 179
 180    virtual void invalidate_live_intervals() = 0;
 181 };
 182
 183 uint32_t brw_texture_offset(struct gl_context *ctx, ir_constant *offset);
 184
 185 #endif /* __cplusplus */
 186
 187 enum brw_reg_type brw_type_for_base_type(const struct glsl_type *type);
 188 enum brw_conditional_mod brw_conditional_for_comparison(unsigned int op);
 189 uint32_t brw_math_function(enum opcode op);
 190 const char *brw_instruction_name(enum opcode op);