src/gallium/auxiliary/tgsi/tgsi_exec.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007-2008 VMware, Inc.
   4  * All Rights Reserved.
   5  * Copyright 2009-2010 VMware, Inc.  All rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 #ifndef TGSI_EXEC_H
  30 #define TGSI_EXEC_H
  31
  32 #include "pipe/p_compiler.h"
  33 #include "pipe/p_state.h"
  34 #include "pipe/p_shader_tokens.h"
  35
  36 #if defined __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 #define TGSI_CHAN_X 0
  41 #define TGSI_CHAN_Y 1
  42 #define TGSI_CHAN_Z 2
  43 #define TGSI_CHAN_W 3
  44
  45 #define TGSI_NUM_CHANNELS 4  /* R,G,B,A */
  46 #define TGSI_QUAD_SIZE    4  /* 4 pixel/quad */
  47
  48 #define TGSI_FOR_EACH_CHANNEL( CHAN )\
  49    for (CHAN = 0; CHAN < TGSI_NUM_CHANNELS; CHAN++)
  50
  51 #define TGSI_IS_DST0_CHANNEL_ENABLED( INST, CHAN )\
  52    ((INST)->Dst[0].Register.WriteMask & (1 << (CHAN)))
  53
  54 #define TGSI_IF_IS_DST0_CHANNEL_ENABLED( INST, CHAN )\
  55    if (TGSI_IS_DST0_CHANNEL_ENABLED( INST, CHAN ))
  56
  57 #define TGSI_FOR_EACH_DST0_ENABLED_CHANNEL( INST, CHAN )\
  58    TGSI_FOR_EACH_CHANNEL( CHAN )\
  59       TGSI_IF_IS_DST0_CHANNEL_ENABLED( INST, CHAN )
  60
  61 #define TGSI_IS_DST1_CHANNEL_ENABLED( INST, CHAN )\
  62    ((INST)->Dst[1].Register.WriteMask & (1 << (CHAN)))
  63
  64 #define TGSI_IF_IS_DST1_CHANNEL_ENABLED( INST, CHAN )\
  65    if (TGSI_IS_DST1_CHANNEL_ENABLED( INST, CHAN ))
  66
  67 #define TGSI_FOR_EACH_DST1_ENABLED_CHANNEL( INST, CHAN )\
  68    TGSI_FOR_EACH_CHANNEL( CHAN )\
  69       TGSI_IF_IS_DST1_CHANNEL_ENABLED( INST, CHAN )
  70
  71 /**
  72   * Registers may be treated as float, signed int or unsigned int.
  73   */
  74 union tgsi_exec_channel
  75 {
  76    float    f[TGSI_QUAD_SIZE];
  77    int      i[TGSI_QUAD_SIZE];
  78    unsigned u[TGSI_QUAD_SIZE];
  79 };
  80
  81 /**
  82   * A vector[RGBA] of channels[4 pixels]
  83   */
  84 struct tgsi_exec_vector
  85 {
  86    union tgsi_exec_channel xyzw[TGSI_NUM_CHANNELS];
  87 };
  88
  89 /**
  90  * For fragment programs, information for computing fragment input
  91  * values from plane equation of the triangle/line.
  92  */
  93 struct tgsi_interp_coef
  94 {
  95    float a0[TGSI_NUM_CHANNELS]; /* in an xyzw layout */
  96    float dadx[TGSI_NUM_CHANNELS];
  97    float dady[TGSI_NUM_CHANNELS];
  98 };
  99
 100 enum tgsi_sampler_control
 101 {
 102    TGSI_SAMPLER_LOD_NONE,
 103    TGSI_SAMPLER_LOD_BIAS,
 104    TGSI_SAMPLER_LOD_EXPLICIT,
 105    TGSI_SAMPLER_LOD_ZERO,
 106    TGSI_SAMPLER_DERIVS_EXPLICIT,
 107    TGSI_SAMPLER_GATHER,
 108 };
 109
 110 struct tgsi_image_params {
 111    unsigned unit;
 112    unsigned tgsi_tex_instr;
 113    enum pipe_format format;
 114    unsigned execmask;
 115 };
 116
 117 struct tgsi_image {
 118    /* image interfaces */
 119    void (*load)(const struct tgsi_image *image,
 120                 const struct tgsi_image_params *params,
 121                 const int s[TGSI_QUAD_SIZE],
 122                 const int t[TGSI_QUAD_SIZE],
 123                 const int r[TGSI_QUAD_SIZE],
 124                 const int sample[TGSI_QUAD_SIZE],
 125                 float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 126
 127    void (*store)(const struct tgsi_image *image,
 128                  const struct tgsi_image_params *params,
 129                  const int s[TGSI_QUAD_SIZE],
 130                  const int t[TGSI_QUAD_SIZE],
 131                  const int r[TGSI_QUAD_SIZE],
 132                  const int sample[TGSI_QUAD_SIZE],
 133                  float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 134
 135    void (*op)(const struct tgsi_image *image,
 136               const struct tgsi_image_params *params,
 137               enum tgsi_opcode opcode,
 138               const int s[TGSI_QUAD_SIZE],
 139               const int t[TGSI_QUAD_SIZE],
 140               const int r[TGSI_QUAD_SIZE],
 141               const int sample[TGSI_QUAD_SIZE],
 142               float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE],
 143               float rgba2[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 144
 145    void (*get_dims)(const struct tgsi_image *image,
 146                     const struct tgsi_image_params *params,
 147                     int dims[4]);
 148 };
 149
 150 struct tgsi_buffer_params {
 151    unsigned unit;
 152    unsigned execmask;
 153    unsigned writemask;
 154 };
 155
 156 struct tgsi_buffer {
 157    /* buffer interfaces */
 158    void (*load)(const struct tgsi_buffer *buffer,
 159                 const struct tgsi_buffer_params *params,
 160                 const int s[TGSI_QUAD_SIZE],
 161                 float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 162
 163    void (*store)(const struct tgsi_buffer *buffer,
 164                  const struct tgsi_buffer_params *params,
 165                  const int s[TGSI_QUAD_SIZE],
 166                  float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 167
 168    void (*op)(const struct tgsi_buffer *buffer,
 169               const struct tgsi_buffer_params *params,
 170               enum tgsi_opcode opcode,
 171               const int s[TGSI_QUAD_SIZE],
 172               float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE],
 173               float rgba2[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 174
 175    void (*get_dims)(const struct tgsi_buffer *buffer,
 176                     const struct tgsi_buffer_params *params,
 177                     int *dim);
 178 };
 179
 180 /**
 181  * Information for sampling textures, which must be implemented
 182  * by code outside the TGSI executor.
 183  */
 184 struct tgsi_sampler
 185 {
 186    /** Get samples for four fragments in a quad */
 187    /* this interface contains 5 sets of channels that vary
 188     * depending on the sampler.
 189     * s - the first texture coordinate for sampling.
 190     * t - the second texture coordinate for sampling - unused for 1D,
 191           layer for 1D arrays.
 192     * r - the third coordinate for sampling for 3D, cube, cube arrays,
 193     *     layer for 2D arrays. Compare value for 1D/2D shadows.
 194     * c0 - Compare value for shadow cube and shadow 2d arrays,
 195     *      layer for cube arrays.
 196     * derivs - explicit derivatives.
 197     * offset - texel offsets
 198     * lod - lod value, except for shadow cube arrays (compare value there).
 199     */
 200    void (*get_samples)(struct tgsi_sampler *sampler,
 201                        const unsigned sview_index,
 202                        const unsigned sampler_index,
 203                        const float s[TGSI_QUAD_SIZE],
 204                        const float t[TGSI_QUAD_SIZE],
 205                        const float r[TGSI_QUAD_SIZE],
 206                        const float c0[TGSI_QUAD_SIZE],
 207                        const float c1[TGSI_QUAD_SIZE],
 208                        float derivs[3][2][TGSI_QUAD_SIZE],
 209                        const int8_t offset[3],
 210                        enum tgsi_sampler_control control,
 211                        float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 212    void (*get_dims)(struct tgsi_sampler *sampler,
 213                     const unsigned sview_index,
 214                     int level, int dims[4]);
 215    void (*get_texel)(struct tgsi_sampler *sampler,
 216                      const unsigned sview_index,
 217                      const int i[TGSI_QUAD_SIZE],
 218                      const int j[TGSI_QUAD_SIZE], const int k[TGSI_QUAD_SIZE],
 219                      const int lod[TGSI_QUAD_SIZE], const int8_t offset[3],
 220                      float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
 221    void (*query_lod)(const struct tgsi_sampler *tgsi_sampler,
 222                      const unsigned sview_index,
 223                      const unsigned sampler_index,
 224                      const float s[TGSI_QUAD_SIZE],
 225                      const float t[TGSI_QUAD_SIZE],
 226                      const float p[TGSI_QUAD_SIZE],
 227                      const float c0[TGSI_QUAD_SIZE],
 228                      const enum tgsi_sampler_control control,
 229                      float mipmap[TGSI_QUAD_SIZE],
 230                      float lod[TGSI_QUAD_SIZE]);
 231 };
 232
 233 #define TGSI_EXEC_NUM_TEMPS       4096
 234
 235 /*
 236  * Locations of various utility registers (_I = Index, _C = Channel)
 237  */
 238 #define TGSI_EXEC_TEMP_00000000_I   (TGSI_EXEC_NUM_TEMPS + 0)
 239 #define TGSI_EXEC_TEMP_00000000_C   0
 240
 241 #define TGSI_EXEC_TEMP_7FFFFFFF_I   (TGSI_EXEC_NUM_TEMPS + 0)
 242 #define TGSI_EXEC_TEMP_7FFFFFFF_C   1
 243
 244 #define TGSI_EXEC_TEMP_80000000_I   (TGSI_EXEC_NUM_TEMPS + 0)
 245 #define TGSI_EXEC_TEMP_80000000_C   2
 246
 247 #define TGSI_EXEC_TEMP_FFFFFFFF_I   (TGSI_EXEC_NUM_TEMPS + 0)
 248 #define TGSI_EXEC_TEMP_FFFFFFFF_C   3
 249
 250 #define TGSI_EXEC_TEMP_ONE_I        (TGSI_EXEC_NUM_TEMPS + 1)
 251 #define TGSI_EXEC_TEMP_ONE_C        0
 252
 253 #define TGSI_EXEC_TEMP_TWO_I        (TGSI_EXEC_NUM_TEMPS + 1)
 254 #define TGSI_EXEC_TEMP_TWO_C        1
 255
 256 #define TGSI_EXEC_TEMP_128_I        (TGSI_EXEC_NUM_TEMPS + 1)
 257 #define TGSI_EXEC_TEMP_128_C        2
 258
 259 #define TGSI_EXEC_TEMP_MINUS_128_I  (TGSI_EXEC_NUM_TEMPS + 1)
 260 #define TGSI_EXEC_TEMP_MINUS_128_C  3
 261
 262 #define TGSI_EXEC_TEMP_KILMASK_I    (TGSI_EXEC_NUM_TEMPS + 2)
 263 #define TGSI_EXEC_TEMP_KILMASK_C    0
 264
 265 #define TGSI_EXEC_TEMP_OUTPUT_I     (TGSI_EXEC_NUM_TEMPS + 2)
 266 #define TGSI_EXEC_TEMP_OUTPUT_C     1
 267
 268 #define TGSI_EXEC_TEMP_PRIMITIVE_I  (TGSI_EXEC_NUM_TEMPS + 2)
 269 #define TGSI_EXEC_TEMP_PRIMITIVE_C  2
 270
 271 #define TGSI_EXEC_TEMP_THREE_I      (TGSI_EXEC_NUM_TEMPS + 2)
 272 #define TGSI_EXEC_TEMP_THREE_C      3
 273
 274 #define TGSI_EXEC_TEMP_HALF_I       (TGSI_EXEC_NUM_TEMPS + 3)
 275 #define TGSI_EXEC_TEMP_HALF_C       0
 276
 277 /* 4 register buffer for various purposes */
 278 #define TGSI_EXEC_TEMP_R0           (TGSI_EXEC_NUM_TEMPS + 4)
 279 #define TGSI_EXEC_NUM_TEMP_R        4
 280
 281 #define TGSI_EXEC_TEMP_ADDR         (TGSI_EXEC_NUM_TEMPS + 8)
 282 #define TGSI_EXEC_NUM_ADDRS         3
 283
 284 #define TGSI_EXEC_NUM_TEMP_EXTRAS   12
 285
 286
 287
 288 #define TGSI_EXEC_MAX_NESTING  32
 289 #define TGSI_EXEC_MAX_COND_NESTING  TGSI_EXEC_MAX_NESTING
 290 #define TGSI_EXEC_MAX_LOOP_NESTING  TGSI_EXEC_MAX_NESTING
 291 #define TGSI_EXEC_MAX_SWITCH_NESTING TGSI_EXEC_MAX_NESTING
 292 #define TGSI_EXEC_MAX_CALL_NESTING  TGSI_EXEC_MAX_NESTING
 293
 294 /* The maximum number of input attributes per vertex. For 2D
 295  * input register files, this is the stride between two 1D
 296  * arrays.
 297  */
 298 #define TGSI_EXEC_MAX_INPUT_ATTRIBS 32
 299
 300 /* The maximum number of bytes per constant buffer.
 301  */
 302 #define TGSI_EXEC_MAX_CONST_BUFFER_SIZE  (4096 * sizeof(float[4]))
 303
 304 /* The maximum number of vertices per primitive */
 305 #define TGSI_MAX_PRIM_VERTICES 6
 306
 307 /* The maximum number of primitives to be generated */
 308 #define TGSI_MAX_PRIMITIVES 64
 309
 310 /* The maximum total number of vertices */
 311 #define TGSI_MAX_TOTAL_VERTICES (TGSI_MAX_PRIM_VERTICES * TGSI_MAX_PRIMITIVES * PIPE_MAX_ATTRIBS)
 312
 313 #define TGSI_MAX_MISC_INPUTS 8
 314
 315 /** function call/activation record */
 316 struct tgsi_call_record
 317 {
 318    uint CondStackTop;
 319    uint LoopStackTop;
 320    uint ContStackTop;
 321    int SwitchStackTop;
 322    int BreakStackTop;
 323    uint ReturnAddr;
 324 };
 325
 326
 327 /* Switch-case block state. */
 328 struct tgsi_switch_record {
 329    uint mask;                          /**< execution mask */
 330    union tgsi_exec_channel selector;   /**< a value case statements are compared to */
 331    uint defaultMask;                   /**< non-execute mask for default case */
 332 };
 333
 334
 335 enum tgsi_break_type {
 336    TGSI_EXEC_BREAK_INSIDE_LOOP,
 337    TGSI_EXEC_BREAK_INSIDE_SWITCH
 338 };
 339
 340
 341 #define TGSI_EXEC_MAX_BREAK_STACK (TGSI_EXEC_MAX_LOOP_NESTING + TGSI_EXEC_MAX_SWITCH_NESTING)
 342
 343 typedef float float4[4];
 344
 345 /**
 346  * Run-time virtual machine state for executing TGSI shader.
 347  */
 348 struct tgsi_exec_machine
 349 {
 350    /* Total = program temporaries + internal temporaries
 351     */
 352    struct tgsi_exec_vector       Temps[TGSI_EXEC_NUM_TEMPS +
 353                                        TGSI_EXEC_NUM_TEMP_EXTRAS];
 354
 355    unsigned                       ImmsReserved;
 356    float4                         *Imms;
 357
 358    struct tgsi_exec_vector       *Inputs;
 359    struct tgsi_exec_vector       *Outputs;
 360
 361    /* System values */
 362    unsigned                      SysSemanticToIndex[TGSI_SEMANTIC_COUNT];
 363    struct tgsi_exec_vector       SystemValue[TGSI_MAX_MISC_INPUTS];
 364
 365    struct tgsi_exec_vector       *Addrs;
 366
 367    struct tgsi_sampler           *Sampler;
 368
 369    struct tgsi_image             *Image;
 370    struct tgsi_buffer            *Buffer;
 371    unsigned                      ImmLimit;
 372
 373    const void *Consts[PIPE_MAX_CONSTANT_BUFFERS];
 374    unsigned ConstsSize[PIPE_MAX_CONSTANT_BUFFERS];
 375
 376    const struct tgsi_token       *Tokens;   /**< Declarations, instructions */
 377    enum pipe_shader_type         ShaderType; /**< PIPE_SHADER_x */
 378
 379    /* GEOMETRY processor only. */
 380    unsigned                      *Primitives;
 381    unsigned                       NumOutputs;
 382    unsigned                       MaxGeometryShaderOutputs;
 383    unsigned                       MaxOutputVertices;
 384
 385    /* FRAGMENT processor only. */
 386    const struct tgsi_interp_coef *InterpCoefs;
 387    struct tgsi_exec_vector       QuadPos;
 388    float                         Face;    /**< +1 if front facing, -1 if back facing */
 389    bool                          flatshade_color;
 390
 391    /* Compute Only */
 392    void                          *LocalMem;
 393    unsigned                      LocalMemSize;
 394
 395    /* See GLSL 4.50 specification for definition of helper invocations */
 396    uint NonHelperMask;  /**< non-helpers */
 397    /* Conditional execution masks */
 398    uint CondMask;  /**< For IF/ELSE/ENDIF */
 399    uint LoopMask;  /**< For BGNLOOP/ENDLOOP */
 400    uint ContMask;  /**< For loop CONT statements */
 401    uint FuncMask;  /**< For function calls */
 402    uint ExecMask;  /**< = CondMask & LoopMask */
 403
 404    /* Current switch-case state. */
 405    struct tgsi_switch_record Switch;
 406
 407    /* Current break type. */
 408    enum tgsi_break_type BreakType;
 409
 410    /** Condition mask stack (for nested conditionals) */
 411    uint CondStack[TGSI_EXEC_MAX_COND_NESTING];
 412    int CondStackTop;
 413
 414    /** Loop mask stack (for nested loops) */
 415    uint LoopStack[TGSI_EXEC_MAX_LOOP_NESTING];
 416    int LoopStackTop;
 417
 418    /** Loop label stack */
 419    uint LoopLabelStack[TGSI_EXEC_MAX_LOOP_NESTING];
 420    int LoopLabelStackTop;
 421
 422    /** Loop continue mask stack (see comments in tgsi_exec.c) */
 423    uint ContStack[TGSI_EXEC_MAX_LOOP_NESTING];
 424    int ContStackTop;
 425
 426    /** Switch case stack */
 427    struct tgsi_switch_record SwitchStack[TGSI_EXEC_MAX_SWITCH_NESTING];
 428    int SwitchStackTop;
 429
 430    enum tgsi_break_type BreakStack[TGSI_EXEC_MAX_BREAK_STACK];
 431    int BreakStackTop;
 432
 433    /** Function execution mask stack (for executing subroutine code) */
 434    uint FuncStack[TGSI_EXEC_MAX_CALL_NESTING];
 435    int FuncStackTop;
 436
 437    /** Function call stack for saving/restoring the program counter */
 438    struct tgsi_call_record CallStack[TGSI_EXEC_MAX_CALL_NESTING];
 439    int CallStackTop;
 440
 441    struct tgsi_full_instruction *Instructions;
 442    uint NumInstructions;
 443
 444    struct tgsi_full_declaration *Declarations;
 445    uint NumDeclarations;
 446
 447    struct tgsi_declaration_sampler_view
 448       SamplerViews[PIPE_MAX_SHADER_SAMPLER_VIEWS];
 449
 450    boolean UsedGeometryShader;
 451
 452    int pc;
 453 };
 454
 455 struct tgsi_exec_machine *
 456 tgsi_exec_machine_create(enum pipe_shader_type shader_type);
 457
 458 void
 459 tgsi_exec_machine_destroy(struct tgsi_exec_machine *mach);
 460
 461
 462 void
 463 tgsi_exec_machine_bind_shader(
 464    struct tgsi_exec_machine *mach,
 465    const struct tgsi_token *tokens,
 466    struct tgsi_sampler *sampler,
 467    struct tgsi_image *image,
 468    struct tgsi_buffer *buffer);
 469
 470 uint
 471 tgsi_exec_machine_run(
 472    struct tgsi_exec_machine *mach, int start_pc );
 473
 474
 475 void
 476 tgsi_exec_machine_free_data(struct tgsi_exec_machine *mach);
 477
 478
 479 boolean
 480 tgsi_check_soa_dependencies(const struct tgsi_full_instruction *inst);
 481
 482
 483 extern void
 484 tgsi_exec_set_constant_buffers(struct tgsi_exec_machine *mach,
 485                                unsigned num_bufs,
 486                                const void **bufs,
 487                                const unsigned *buf_sizes);
 488
 489
 490 static inline int
 491 tgsi_exec_get_shader_param(enum pipe_shader_cap param)
 492 {
 493    switch(param) {
 494    case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 495    case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 496    case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 497    case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 498       return INT_MAX;
 499    case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 500       return TGSI_EXEC_MAX_NESTING;
 501    case PIPE_SHADER_CAP_MAX_INPUTS:
 502       return TGSI_EXEC_MAX_INPUT_ATTRIBS;
 503    case PIPE_SHADER_CAP_MAX_OUTPUTS:
 504       return 32;
 505    case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 506       return TGSI_EXEC_MAX_CONST_BUFFER_SIZE;
 507    case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 508       return PIPE_MAX_CONSTANT_BUFFERS;
 509    case PIPE_SHADER_CAP_MAX_TEMPS:
 510       return TGSI_EXEC_NUM_TEMPS;
 511    case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 512       return 1;
 513    case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 514    case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 515    case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 516    case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 517       return 1;
 518    case PIPE_SHADER_CAP_SUBROUTINES:
 519       return 1;
 520    case PIPE_SHADER_CAP_INTEGERS:
 521       return 1;
 522    case PIPE_SHADER_CAP_INT64_ATOMICS:
 523    case PIPE_SHADER_CAP_FP16:
 524       return 0;
 525    case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 526       return PIPE_MAX_SAMPLERS;
 527    case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 528       return PIPE_MAX_SHADER_SAMPLER_VIEWS;
 529    case PIPE_SHADER_CAP_PREFERRED_IR:
 530       return PIPE_SHADER_IR_TGSI;
 531    case PIPE_SHADER_CAP_SUPPORTED_IRS:
 532       return 1 << PIPE_SHADER_IR_TGSI;
 533    case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 534       return 1;
 535    case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 536    case PIPE_SHADER_CAP_TGSI_LDEXP_SUPPORTED:
 537    case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 538       return 1;
 539    case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 540    case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 541    case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 542    case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 543    case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS:
 544    case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
 545       return 0;
 546    case PIPE_SHADER_CAP_SCALAR_ISA:
 547       return 1;
 548    case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
 549       return PIPE_MAX_SHADER_BUFFERS;
 550    case PIPE_SHADER_CAP_MAX_SHADER_IMAGES:
 551       return PIPE_MAX_SHADER_IMAGES;
 552
 553    case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
 554       return 32;
 555    }
 556    /* if we get here, we missed a shader cap above (and should have seen
 557     * a compiler warning.)
 558     */
 559    return 0;
 560 }
 561
 562 #if defined __cplusplus
 563 } /* extern "C" */
 564 #endif
 565
 566 #endif /* TGSI_EXEC_H */