src/gallium/drivers/cell/spu/spu_exec.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #if !defined SPU_EXEC_H
  29 #define SPU_EXEC_H
  30
  31 #include "pipe/p_compiler.h"
  32 #include "tgsi/tgsi_exec.h"
  33
  34 #if defined __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 /**
  39   * Registers may be treated as float, signed int or unsigned int.
  40   */
  41 union spu_exec_channel
  42 {
  43    float    f[QUAD_SIZE];
  44    int      i[QUAD_SIZE];
  45    unsigned u[QUAD_SIZE];
  46    qword    q;
  47 };
  48
  49 /**
  50   * A vector[RGBA] of channels[4 pixels]
  51   */
  52 struct spu_exec_vector
  53 {
  54    union spu_exec_channel xyzw[NUM_CHANNELS];
  55 };
  56
  57 /**
  58  * For fragment programs, information for computing fragment input
  59  * values from plane equation of the triangle/line.
  60  */
  61 struct spu_interp_coef
  62 {
  63    float a0[NUM_CHANNELS];      /* in an xyzw layout */
  64    float dadx[NUM_CHANNELS];
  65    float dady[NUM_CHANNELS];
  66 };
  67
  68
  69 struct softpipe_tile_cache;  /**< Opaque to TGSI */
  70
  71 /**
  72  * Information for sampling textures, which must be implemented
  73  * by code outside the TGSI executor.
  74  */
  75 struct spu_sampler
  76 {
  77    const struct pipe_sampler_state *state;
  78    struct pipe_resource *texture;
  79    /** Get samples for four fragments in a quad */
  80    void (*get_samples)(struct spu_sampler *sampler,
  81                        const float s[QUAD_SIZE],
  82                        const float t[QUAD_SIZE],
  83                        const float p[QUAD_SIZE],
  84                        float lodbias,
  85                        float rgba[NUM_CHANNELS][QUAD_SIZE]);
  86    void *pipe; /*XXX temporary*/
  87    struct softpipe_tile_cache *cache;
  88 };
  89
  90
  91 /**
  92  * Run-time virtual machine state for executing TGSI shader.
  93  */
  94 struct spu_exec_machine
  95 {
  96    /*
  97     * 32 program temporaries
  98     * 4  internal temporaries
  99     * 1  address
 100     */
 101    PIPE_ALIGN_VAR(16)
 102    struct spu_exec_vector       Temps[TGSI_EXEC_NUM_TEMPS
 103                                       + TGSI_EXEC_NUM_TEMP_EXTRAS + 1];
 104
 105    struct spu_exec_vector       *Addrs;
 106
 107    struct spu_sampler           *Samplers;
 108
 109    float                         Imms[TGSI_EXEC_NUM_IMMEDIATES][4];
 110    unsigned                      ImmLimit;
 111    float                         (*Consts)[4];
 112    struct spu_exec_vector       *Inputs;
 113    struct spu_exec_vector       *Outputs;
 114    unsigned                      Processor;
 115
 116    /* GEOMETRY processor only. */
 117    unsigned                      *Primitives;
 118
 119    /* FRAGMENT processor only. */
 120    const struct spu_interp_coef *InterpCoefs;
 121    struct spu_exec_vector       QuadPos;
 122
 123    /* Conditional execution masks */
 124    uint CondMask;  /**< For IF/ELSE/ENDIF */
 125    uint LoopMask;  /**< For BGNLOOP/ENDLOOP */
 126    uint ContMask;  /**< For loop CONT statements */
 127    uint FuncMask;  /**< For function calls */
 128    uint ExecMask;  /**< = CondMask & LoopMask */
 129
 130    /** Condition mask stack (for nested conditionals) */
 131    uint CondStack[TGSI_EXEC_MAX_COND_NESTING];
 132    int CondStackTop;
 133
 134    /** Loop mask stack (for nested loops) */
 135    uint LoopStack[TGSI_EXEC_MAX_LOOP_NESTING];
 136    int LoopStackTop;
 137
 138    /** Loop continue mask stack (see comments in tgsi_exec.c) */
 139    uint ContStack[TGSI_EXEC_MAX_LOOP_NESTING];
 140    int ContStackTop;
 141
 142    /** Function execution mask stack (for executing subroutine code) */
 143    uint FuncStack[TGSI_EXEC_MAX_CALL_NESTING];
 144    int FuncStackTop;
 145
 146    /** Function call stack for saving/restoring the program counter */
 147    uint CallStack[TGSI_EXEC_MAX_CALL_NESTING];
 148    int CallStackTop;
 149
 150    struct tgsi_full_instruction *Instructions;
 151    uint NumInstructions;
 152
 153    struct tgsi_full_declaration *Declarations;
 154    uint NumDeclarations;
 155 };
 156
 157
 158 extern void
 159 spu_exec_machine_init(struct spu_exec_machine *mach,
 160                       uint numSamplers,
 161                       struct spu_sampler *samplers,
 162                       unsigned processor);
 163
 164 extern uint
 165 spu_exec_machine_run( struct spu_exec_machine *mach );
 166
 167
 168 #if defined __cplusplus
 169 } /* extern "C" */
 170 #endif
 171
 172 #endif /* SPU_EXEC_H */