src/gallium/include/pipe/p_shader_tokens.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * Copyright 2009-2010 VMware, Inc.
   5  * 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 TUNGSTEN GRAPHICS 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 P_SHADER_TOKENS_H
  30 #define P_SHADER_TOKENS_H
  31
  32 #ifdef __cplusplus
  33 extern "C" {
  34 #endif
  35
  36
  37 struct tgsi_header
  38 {
  39    unsigned HeaderSize : 8;
  40    unsigned BodySize   : 24;
  41 };
  42
  43 #define TGSI_PROCESSOR_FRAGMENT  0
  44 #define TGSI_PROCESSOR_VERTEX    1
  45 #define TGSI_PROCESSOR_GEOMETRY  2
  46 #define TGSI_PROCESSOR_COMPUTE   3
  47
  48 struct tgsi_processor
  49 {
  50    unsigned Processor  : 4;  /* TGSI_PROCESSOR_ */
  51    unsigned Padding    : 28;
  52 };
  53
  54 #define TGSI_TOKEN_TYPE_DECLARATION    0
  55 #define TGSI_TOKEN_TYPE_IMMEDIATE      1
  56 #define TGSI_TOKEN_TYPE_INSTRUCTION    2
  57 #define TGSI_TOKEN_TYPE_PROPERTY       3
  58
  59 struct tgsi_token
  60 {
  61    unsigned Type       : 4;  /**< TGSI_TOKEN_TYPE_x */
  62    unsigned NrTokens   : 8;  /**< UINT */
  63    unsigned Padding    : 20;
  64 };
  65
  66 enum tgsi_file_type {
  67    TGSI_FILE_NULL                =0,
  68    TGSI_FILE_CONSTANT            =1,
  69    TGSI_FILE_INPUT               =2,
  70    TGSI_FILE_OUTPUT              =3,
  71    TGSI_FILE_TEMPORARY           =4,
  72    TGSI_FILE_SAMPLER             =5,
  73    TGSI_FILE_ADDRESS             =6,
  74    TGSI_FILE_IMMEDIATE           =7,
  75    TGSI_FILE_PREDICATE           =8,
  76    TGSI_FILE_SYSTEM_VALUE        =9,
  77    TGSI_FILE_RESOURCE            =10,
  78    TGSI_FILE_SAMPLER_VIEW        =11,
  79    TGSI_FILE_COUNT      /**< how many TGSI_FILE_ types */
  80 };
  81
  82
  83 #define TGSI_WRITEMASK_NONE     0x00
  84 #define TGSI_WRITEMASK_X        0x01
  85 #define TGSI_WRITEMASK_Y        0x02
  86 #define TGSI_WRITEMASK_XY       0x03
  87 #define TGSI_WRITEMASK_Z        0x04
  88 #define TGSI_WRITEMASK_XZ       0x05
  89 #define TGSI_WRITEMASK_YZ       0x06
  90 #define TGSI_WRITEMASK_XYZ      0x07
  91 #define TGSI_WRITEMASK_W        0x08
  92 #define TGSI_WRITEMASK_XW       0x09
  93 #define TGSI_WRITEMASK_YW       0x0A
  94 #define TGSI_WRITEMASK_XYW      0x0B
  95 #define TGSI_WRITEMASK_ZW       0x0C
  96 #define TGSI_WRITEMASK_XZW      0x0D
  97 #define TGSI_WRITEMASK_YZW      0x0E
  98 #define TGSI_WRITEMASK_XYZW     0x0F
  99
 100 #define TGSI_INTERPOLATE_CONSTANT      0
 101 #define TGSI_INTERPOLATE_LINEAR        1
 102 #define TGSI_INTERPOLATE_PERSPECTIVE   2
 103 #define TGSI_INTERPOLATE_COLOR         3 /* special color case for smooth/flat */
 104 #define TGSI_INTERPOLATE_COUNT         4
 105
 106 #define TGSI_CYLINDRICAL_WRAP_X (1 << 0)
 107 #define TGSI_CYLINDRICAL_WRAP_Y (1 << 1)
 108 #define TGSI_CYLINDRICAL_WRAP_Z (1 << 2)
 109 #define TGSI_CYLINDRICAL_WRAP_W (1 << 3)
 110
 111 struct tgsi_declaration
 112 {
 113    unsigned Type        : 4;  /**< TGSI_TOKEN_TYPE_DECLARATION */
 114    unsigned NrTokens    : 8;  /**< UINT */
 115    unsigned File        : 4;  /**< one of TGSI_FILE_x */
 116    unsigned UsageMask   : 4;  /**< bitmask of TGSI_WRITEMASK_x flags */
 117    unsigned Dimension   : 1;  /**< any extra dimension info? */
 118    unsigned Semantic    : 1;  /**< BOOL, any semantic info? */
 119    unsigned Interpolate : 1;  /**< any interpolation info? */
 120    unsigned Invariant   : 1;  /**< invariant optimization? */
 121    unsigned Local       : 1;  /**< optimize as subroutine local variable? */
 122    unsigned Array       : 1;  /**< extra array info? */
 123    unsigned Padding     : 6;
 124 };
 125
 126 struct tgsi_declaration_range
 127 {
 128    unsigned First   : 16; /**< UINT */
 129    unsigned Last    : 16; /**< UINT */
 130 };
 131
 132 struct tgsi_declaration_dimension
 133 {
 134    unsigned Index2D:16; /**< UINT */
 135    unsigned Padding:16;
 136 };
 137
 138 struct tgsi_declaration_interp
 139 {
 140    unsigned Interpolate : 4;   /**< one of TGSI_INTERPOLATE_x */
 141    unsigned Centroid    : 1;   /**< centroid sampling? */
 142    unsigned CylindricalWrap:4; /**< TGSI_CYLINDRICAL_WRAP_x flags */
 143    unsigned Padding     : 23;
 144 };
 145
 146 #define TGSI_SEMANTIC_POSITION   0
 147 #define TGSI_SEMANTIC_COLOR      1
 148 #define TGSI_SEMANTIC_BCOLOR     2  /**< back-face color */
 149 #define TGSI_SEMANTIC_FOG        3
 150 #define TGSI_SEMANTIC_PSIZE      4
 151 #define TGSI_SEMANTIC_GENERIC    5
 152 #define TGSI_SEMANTIC_NORMAL     6
 153 #define TGSI_SEMANTIC_FACE       7
 154 #define TGSI_SEMANTIC_EDGEFLAG   8
 155 #define TGSI_SEMANTIC_PRIMID     9
 156 #define TGSI_SEMANTIC_INSTANCEID 10
 157 #define TGSI_SEMANTIC_VERTEXID   11
 158 #define TGSI_SEMANTIC_STENCIL    12
 159 #define TGSI_SEMANTIC_CLIPDIST   13
 160 #define TGSI_SEMANTIC_CLIPVERTEX 14
 161 #define TGSI_SEMANTIC_GRID_SIZE  15 /**< grid size in blocks */
 162 #define TGSI_SEMANTIC_BLOCK_ID   16 /**< id of the current block */
 163 #define TGSI_SEMANTIC_BLOCK_SIZE 17 /**< block size in threads */
 164 #define TGSI_SEMANTIC_THREAD_ID  18 /**< block-relative id of the current thread */
 165 #define TGSI_SEMANTIC_COUNT      19 /**< number of semantic values */
 166
 167 struct tgsi_declaration_semantic
 168 {
 169    unsigned Name           : 8;  /**< one of TGSI_SEMANTIC_x */
 170    unsigned Index          : 16; /**< UINT */
 171    unsigned Padding        : 8;
 172 };
 173
 174 struct tgsi_declaration_resource {
 175    unsigned Resource    : 8; /**< one of TGSI_TEXTURE_ */
 176    unsigned Raw         : 1;
 177    unsigned Writable    : 1;
 178    unsigned Padding     : 22;
 179 };
 180
 181 struct tgsi_declaration_sampler_view {
 182    unsigned Resource    : 8; /**< one of TGSI_TEXTURE_ */
 183    unsigned ReturnTypeX : 6; /**< one of enum pipe_type */
 184    unsigned ReturnTypeY : 6; /**< one of enum pipe_type */
 185    unsigned ReturnTypeZ : 6; /**< one of enum pipe_type */
 186    unsigned ReturnTypeW : 6; /**< one of enum pipe_type */
 187 };
 188
 189 struct tgsi_declaration_array {
 190    unsigned ArrayID : 10;
 191    unsigned Padding : 22;
 192 };
 193
 194 /*
 195  * Special resources that don't need to be declared.  They map to the
 196  * GLOBAL/LOCAL/PRIVATE/INPUT compute memory spaces.
 197  */
 198 #define TGSI_RESOURCE_GLOBAL    0x7fff
 199 #define TGSI_RESOURCE_LOCAL     0x7ffe
 200 #define TGSI_RESOURCE_PRIVATE   0x7ffd
 201 #define TGSI_RESOURCE_INPUT     0x7ffc
 202
 203 #define TGSI_IMM_FLOAT32   0
 204 #define TGSI_IMM_UINT32    1
 205 #define TGSI_IMM_INT32     2
 206
 207 struct tgsi_immediate
 208 {
 209    unsigned Type       : 4;  /**< TGSI_TOKEN_TYPE_IMMEDIATE */
 210    unsigned NrTokens   : 14; /**< UINT */
 211    unsigned DataType   : 4;  /**< one of TGSI_IMM_x */
 212    unsigned Padding    : 10;
 213 };
 214
 215 union tgsi_immediate_data
 216 {
 217    float Float;
 218    unsigned Uint;
 219    int Int;
 220 };
 221
 222 #define TGSI_PROPERTY_GS_INPUT_PRIM          0
 223 #define TGSI_PROPERTY_GS_OUTPUT_PRIM         1
 224 #define TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES 2
 225 #define TGSI_PROPERTY_FS_COORD_ORIGIN        3
 226 #define TGSI_PROPERTY_FS_COORD_PIXEL_CENTER  4
 227 #define TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS 5
 228 #define TGSI_PROPERTY_FS_DEPTH_LAYOUT        6
 229 #define TGSI_PROPERTY_VS_PROHIBIT_UCPS       7
 230 #define TGSI_PROPERTY_COUNT                  8
 231
 232 struct tgsi_property {
 233    unsigned Type         : 4;  /**< TGSI_TOKEN_TYPE_PROPERTY */
 234    unsigned NrTokens     : 8;  /**< UINT */
 235    unsigned PropertyName : 8;  /**< one of TGSI_PROPERTY */
 236    unsigned Padding      : 12;
 237 };
 238
 239 #define TGSI_FS_COORD_ORIGIN_UPPER_LEFT 0
 240 #define TGSI_FS_COORD_ORIGIN_LOWER_LEFT 1
 241
 242 #define TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER 0
 243 #define TGSI_FS_COORD_PIXEL_CENTER_INTEGER 1
 244
 245 #define TGSI_FS_DEPTH_LAYOUT_NONE         0
 246 #define TGSI_FS_DEPTH_LAYOUT_ANY          1
 247 #define TGSI_FS_DEPTH_LAYOUT_GREATER      2
 248 #define TGSI_FS_DEPTH_LAYOUT_LESS         3
 249 #define TGSI_FS_DEPTH_LAYOUT_UNCHANGED    4
 250
 251
 252 struct tgsi_property_data {
 253    unsigned Data;
 254 };
 255
 256 /* TGSI opcodes.
 257  *
 258  * For more information on semantics of opcodes and
 259  * which APIs are known to use which opcodes, see
 260  * gallium/docs/source/tgsi.rst
 261  */
 262 #define TGSI_OPCODE_ARL                 0
 263 #define TGSI_OPCODE_MOV                 1
 264 #define TGSI_OPCODE_LIT                 2
 265 #define TGSI_OPCODE_RCP                 3
 266 #define TGSI_OPCODE_RSQ                 4
 267 #define TGSI_OPCODE_EXP                 5
 268 #define TGSI_OPCODE_LOG                 6
 269 #define TGSI_OPCODE_MUL                 7
 270 #define TGSI_OPCODE_ADD                 8
 271 #define TGSI_OPCODE_DP3                 9
 272 #define TGSI_OPCODE_DP4                 10
 273 #define TGSI_OPCODE_DST                 11
 274 #define TGSI_OPCODE_MIN                 12
 275 #define TGSI_OPCODE_MAX                 13
 276 #define TGSI_OPCODE_SLT                 14
 277 #define TGSI_OPCODE_SGE                 15
 278 #define TGSI_OPCODE_MAD                 16
 279 #define TGSI_OPCODE_SUB                 17
 280 #define TGSI_OPCODE_LRP                 18
 281 #define TGSI_OPCODE_CND                 19
 282 #define TGSI_OPCODE_SQRT                20
 283 #define TGSI_OPCODE_DP2A                21
 284                                 /* gap */
 285 #define TGSI_OPCODE_FRC                 24
 286 #define TGSI_OPCODE_CLAMP               25
 287 #define TGSI_OPCODE_FLR                 26
 288 #define TGSI_OPCODE_ROUND               27
 289 #define TGSI_OPCODE_EX2                 28
 290 #define TGSI_OPCODE_LG2                 29
 291 #define TGSI_OPCODE_POW                 30
 292 #define TGSI_OPCODE_XPD                 31
 293                                 /* gap */
 294 #define TGSI_OPCODE_ABS                 33
 295 #define TGSI_OPCODE_RCC                 34
 296 #define TGSI_OPCODE_DPH                 35
 297 #define TGSI_OPCODE_COS                 36
 298 #define TGSI_OPCODE_DDX                 37
 299 #define TGSI_OPCODE_DDY                 38
 300 #define TGSI_OPCODE_KILP                39  /* predicated kill */
 301 #define TGSI_OPCODE_PK2H                40
 302 #define TGSI_OPCODE_PK2US               41
 303 #define TGSI_OPCODE_PK4B                42
 304 #define TGSI_OPCODE_PK4UB               43
 305 #define TGSI_OPCODE_RFL                 44
 306 #define TGSI_OPCODE_SEQ                 45
 307 #define TGSI_OPCODE_SFL                 46
 308 #define TGSI_OPCODE_SGT                 47
 309 #define TGSI_OPCODE_SIN                 48
 310 #define TGSI_OPCODE_SLE                 49
 311 #define TGSI_OPCODE_SNE                 50
 312 #define TGSI_OPCODE_STR                 51
 313 #define TGSI_OPCODE_TEX                 52
 314 #define TGSI_OPCODE_TXD                 53
 315 #define TGSI_OPCODE_TXP                 54
 316 #define TGSI_OPCODE_UP2H                55
 317 #define TGSI_OPCODE_UP2US               56
 318 #define TGSI_OPCODE_UP4B                57
 319 #define TGSI_OPCODE_UP4UB               58
 320 #define TGSI_OPCODE_X2D                 59
 321 #define TGSI_OPCODE_ARA                 60
 322 #define TGSI_OPCODE_ARR                 61
 323 #define TGSI_OPCODE_BRA                 62
 324 #define TGSI_OPCODE_CAL                 63
 325 #define TGSI_OPCODE_RET                 64
 326 #define TGSI_OPCODE_SSG                 65 /* SGN */
 327 #define TGSI_OPCODE_CMP                 66
 328 #define TGSI_OPCODE_SCS                 67
 329 #define TGSI_OPCODE_TXB                 68
 330 #define TGSI_OPCODE_NRM                 69
 331 #define TGSI_OPCODE_DIV                 70
 332 #define TGSI_OPCODE_DP2                 71
 333 #define TGSI_OPCODE_TXL                 72
 334 #define TGSI_OPCODE_BRK                 73
 335 #define TGSI_OPCODE_IF                  74
 336                                 /* gap */
 337 #define TGSI_OPCODE_ELSE                77
 338 #define TGSI_OPCODE_ENDIF               78
 339                                 /* gap */
 340 #define TGSI_OPCODE_PUSHA               81
 341 #define TGSI_OPCODE_POPA                82
 342 #define TGSI_OPCODE_CEIL                83
 343 #define TGSI_OPCODE_I2F                 84
 344 #define TGSI_OPCODE_NOT                 85
 345 #define TGSI_OPCODE_TRUNC               86
 346 #define TGSI_OPCODE_SHL                 87
 347                                 /* gap */
 348 #define TGSI_OPCODE_AND                 89
 349 #define TGSI_OPCODE_OR                  90
 350 #define TGSI_OPCODE_MOD                 91
 351 #define TGSI_OPCODE_XOR                 92
 352 #define TGSI_OPCODE_SAD                 93
 353 #define TGSI_OPCODE_TXF                 94
 354 #define TGSI_OPCODE_TXQ                 95
 355 #define TGSI_OPCODE_CONT                96
 356 #define TGSI_OPCODE_EMIT                97
 357 #define TGSI_OPCODE_ENDPRIM             98
 358 #define TGSI_OPCODE_BGNLOOP             99
 359 #define TGSI_OPCODE_BGNSUB              100
 360 #define TGSI_OPCODE_ENDLOOP             101
 361 #define TGSI_OPCODE_ENDSUB              102
 362 #define TGSI_OPCODE_TXQ_LZ              103 /* TXQ for mipmap level 0 */
 363                                 /* gap */
 364 #define TGSI_OPCODE_NOP                 107
 365                                 /* gap */
 366 #define TGSI_OPCODE_NRM4                112
 367 #define TGSI_OPCODE_CALLNZ              113
 368 #define TGSI_OPCODE_IFC                 114
 369 #define TGSI_OPCODE_BREAKC              115
 370 #define TGSI_OPCODE_KIL                 116  /* conditional kill */
 371 #define TGSI_OPCODE_END                 117  /* aka HALT */
 372                                 /* gap */
 373 #define TGSI_OPCODE_F2I                 119
 374 #define TGSI_OPCODE_IDIV                120
 375 #define TGSI_OPCODE_IMAX                121
 376 #define TGSI_OPCODE_IMIN                122
 377 #define TGSI_OPCODE_INEG                123
 378 #define TGSI_OPCODE_ISGE                124
 379 #define TGSI_OPCODE_ISHR                125
 380 #define TGSI_OPCODE_ISLT                126
 381 #define TGSI_OPCODE_F2U                 127
 382 #define TGSI_OPCODE_U2F                 128
 383 #define TGSI_OPCODE_UADD                129
 384 #define TGSI_OPCODE_UDIV                130
 385 #define TGSI_OPCODE_UMAD                131
 386 #define TGSI_OPCODE_UMAX                132
 387 #define TGSI_OPCODE_UMIN                133
 388 #define TGSI_OPCODE_UMOD                134
 389 #define TGSI_OPCODE_UMUL                135
 390 #define TGSI_OPCODE_USEQ                136
 391 #define TGSI_OPCODE_USGE                137
 392 #define TGSI_OPCODE_USHR                138
 393 #define TGSI_OPCODE_USLT                139
 394 #define TGSI_OPCODE_USNE                140
 395 #define TGSI_OPCODE_SWITCH              141
 396 #define TGSI_OPCODE_CASE                142
 397 #define TGSI_OPCODE_DEFAULT             143
 398 #define TGSI_OPCODE_ENDSWITCH           144
 399
 400 /* resource related opcodes */
 401 #define TGSI_OPCODE_SAMPLE              145
 402 #define TGSI_OPCODE_SAMPLE_I            146
 403 #define TGSI_OPCODE_SAMPLE_I_MS         147
 404 #define TGSI_OPCODE_SAMPLE_B            148
 405 #define TGSI_OPCODE_SAMPLE_C            149
 406 #define TGSI_OPCODE_SAMPLE_C_LZ         150
 407 #define TGSI_OPCODE_SAMPLE_D            151
 408 #define TGSI_OPCODE_SAMPLE_L            152
 409 #define TGSI_OPCODE_GATHER4             153
 410 #define TGSI_OPCODE_SVIEWINFO           154
 411 #define TGSI_OPCODE_SAMPLE_POS          155
 412 #define TGSI_OPCODE_SAMPLE_INFO         156
 413
 414 #define TGSI_OPCODE_UARL                157
 415 #define TGSI_OPCODE_UCMP                158
 416 #define TGSI_OPCODE_IABS                159
 417 #define TGSI_OPCODE_ISSG                160
 418
 419 #define TGSI_OPCODE_LOAD                161
 420 #define TGSI_OPCODE_STORE               162
 421
 422 #define TGSI_OPCODE_MFENCE              163
 423 #define TGSI_OPCODE_LFENCE              164
 424 #define TGSI_OPCODE_SFENCE              165
 425 #define TGSI_OPCODE_BARRIER             166
 426
 427 #define TGSI_OPCODE_ATOMUADD            167
 428 #define TGSI_OPCODE_ATOMXCHG            168
 429 #define TGSI_OPCODE_ATOMCAS             169
 430 #define TGSI_OPCODE_ATOMAND             170
 431 #define TGSI_OPCODE_ATOMOR              171
 432 #define TGSI_OPCODE_ATOMXOR             172
 433 #define TGSI_OPCODE_ATOMUMIN            173
 434 #define TGSI_OPCODE_ATOMUMAX            174
 435 #define TGSI_OPCODE_ATOMIMIN            175
 436 #define TGSI_OPCODE_ATOMIMAX            176
 437
 438 /* to be used for shadow cube map compares */
 439 #define TGSI_OPCODE_TEX2                177
 440 #define TGSI_OPCODE_TXB2                178
 441 #define TGSI_OPCODE_TXL2                179
 442
 443 #define TGSI_OPCODE_LAST                180
 444
 445 #define TGSI_SAT_NONE            0  /* do not saturate */
 446 #define TGSI_SAT_ZERO_ONE        1  /* clamp to [0,1] */
 447 #define TGSI_SAT_MINUS_PLUS_ONE  2  /* clamp to [-1,1] */
 448
 449 /**
 450  * Opcode is the operation code to execute. A given operation defines the
 451  * semantics how the source registers (if any) are interpreted and what is
 452  * written to the destination registers (if any) as a result of execution.
 453  *
 454  * NumDstRegs and NumSrcRegs is the number of destination and source registers,
 455  * respectively. For a given operation code, those numbers are fixed and are
 456  * present here only for convenience.
 457  *
 458  * If Predicate is TRUE, tgsi_instruction_predicate token immediately follows.
 459  *
 460  * Saturate controls how are final results in destination registers modified.
 461  */
 462
 463 struct tgsi_instruction
 464 {
 465    unsigned Type       : 4;  /* TGSI_TOKEN_TYPE_INSTRUCTION */
 466    unsigned NrTokens   : 8;  /* UINT */
 467    unsigned Opcode     : 8;  /* TGSI_OPCODE_ */
 468    unsigned Saturate   : 2;  /* TGSI_SAT_ */
 469    unsigned NumDstRegs : 2;  /* UINT */
 470    unsigned NumSrcRegs : 4;  /* UINT */
 471    unsigned Predicate  : 1;  /* BOOL */
 472    unsigned Label      : 1;
 473    unsigned Texture    : 1;
 474    unsigned Padding    : 1;
 475 };
 476
 477 /*
 478  * If tgsi_instruction::Label is TRUE, tgsi_instruction_label follows.
 479  *
 480  * If tgsi_instruction::Texture is TRUE, tgsi_instruction_texture follows.
 481  *   if texture instruction has a number of offsets,
 482  *   then tgsi_instruction::Texture::NumOffset of tgsi_texture_offset follow.
 483  *
 484  * Then, tgsi_instruction::NumDstRegs of tgsi_dst_register follow.
 485  *
 486  * Then, tgsi_instruction::NumSrcRegs of tgsi_src_register follow.
 487  *
 488  * tgsi_instruction::NrTokens contains the total number of words that make the
 489  * instruction, including the instruction word.
 490  */
 491
 492 #define TGSI_SWIZZLE_X      0
 493 #define TGSI_SWIZZLE_Y      1
 494 #define TGSI_SWIZZLE_Z      2
 495 #define TGSI_SWIZZLE_W      3
 496
 497 struct tgsi_instruction_label
 498 {
 499    unsigned Label    : 24;   /* UINT */
 500    unsigned Padding  : 8;
 501 };
 502
 503 #define TGSI_TEXTURE_BUFFER         0
 504 #define TGSI_TEXTURE_1D             1
 505 #define TGSI_TEXTURE_2D             2
 506 #define TGSI_TEXTURE_3D             3
 507 #define TGSI_TEXTURE_CUBE           4
 508 #define TGSI_TEXTURE_RECT           5
 509 #define TGSI_TEXTURE_SHADOW1D       6
 510 #define TGSI_TEXTURE_SHADOW2D       7
 511 #define TGSI_TEXTURE_SHADOWRECT     8
 512 #define TGSI_TEXTURE_1D_ARRAY       9
 513 #define TGSI_TEXTURE_2D_ARRAY       10
 514 #define TGSI_TEXTURE_SHADOW1D_ARRAY 11
 515 #define TGSI_TEXTURE_SHADOW2D_ARRAY 12
 516 #define TGSI_TEXTURE_SHADOWCUBE     13
 517 #define TGSI_TEXTURE_2D_MSAA        14
 518 #define TGSI_TEXTURE_2D_ARRAY_MSAA  15
 519 #define TGSI_TEXTURE_CUBE_ARRAY     16
 520 #define TGSI_TEXTURE_SHADOWCUBE_ARRAY 17
 521 #define TGSI_TEXTURE_UNKNOWN        18
 522 #define TGSI_TEXTURE_COUNT          19
 523
 524 struct tgsi_instruction_texture
 525 {
 526    unsigned Texture  : 8;    /* TGSI_TEXTURE_ */
 527    unsigned NumOffsets : 4;
 528    unsigned Padding : 20;
 529 };
 530
 531 /* for texture offsets in GLSL and DirectX.
 532  * Generally these always come from TGSI_FILE_IMMEDIATE,
 533  * however DX11 appears to have the capability to do
 534  * non-constant texture offsets.
 535  */
 536 struct tgsi_texture_offset
 537 {
 538    int      Index    : 16;
 539    unsigned File     : 4;  /**< one of TGSI_FILE_x */
 540    unsigned SwizzleX : 2;  /* TGSI_SWIZZLE_x */
 541    unsigned SwizzleY : 2;  /* TGSI_SWIZZLE_x */
 542    unsigned SwizzleZ : 2;  /* TGSI_SWIZZLE_x */
 543    unsigned Padding  : 6;
 544 };
 545
 546 /*
 547  * For SM3, the following constraint applies.
 548  *   - Swizzle is either set to identity or replicate.
 549  */
 550 struct tgsi_instruction_predicate
 551 {
 552    int      Index    : 16; /* SINT */
 553    unsigned SwizzleX : 2;  /* TGSI_SWIZZLE_x */
 554    unsigned SwizzleY : 2;  /* TGSI_SWIZZLE_x */
 555    unsigned SwizzleZ : 2;  /* TGSI_SWIZZLE_x */
 556    unsigned SwizzleW : 2;  /* TGSI_SWIZZLE_x */
 557    unsigned Negate   : 1;  /* BOOL */
 558    unsigned Padding  : 7;
 559 };
 560
 561 /**
 562  * File specifies the register array to access.
 563  *
 564  * Index specifies the element number of a register in the register file.
 565  *
 566  * If Indirect is TRUE, Index should be offset by the X component of the indirect
 567  * register that follows. The register can be now fetched into local storage
 568  * for further processing.
 569  *
 570  * If Negate is TRUE, all components of the fetched register are negated.
 571  *
 572  * The fetched register components are swizzled according to SwizzleX, SwizzleY,
 573  * SwizzleZ and SwizzleW.
 574  *
 575  */
 576
 577 struct tgsi_src_register
 578 {
 579    unsigned File        : 4;  /* TGSI_FILE_ */
 580    unsigned Indirect    : 1;  /* BOOL */
 581    unsigned Dimension   : 1;  /* BOOL */
 582    int      Index       : 16; /* SINT */
 583    unsigned SwizzleX    : 2;  /* TGSI_SWIZZLE_ */
 584    unsigned SwizzleY    : 2;  /* TGSI_SWIZZLE_ */
 585    unsigned SwizzleZ    : 2;  /* TGSI_SWIZZLE_ */
 586    unsigned SwizzleW    : 2;  /* TGSI_SWIZZLE_ */
 587    unsigned Absolute    : 1;    /* BOOL */
 588    unsigned Negate      : 1;    /* BOOL */
 589 };
 590
 591 /**
 592  * If tgsi_src_register::Indirect is TRUE, tgsi_ind_register follows.
 593  *
 594  * File, Index and Swizzle are handled the same as in tgsi_src_register.
 595  *
 596  * If ArrayID is zero the whole register file might be is indirectly addressed,
 597  * if not only the Declaration with this ArrayID is accessed by this operand.
 598  *
 599  */
 600
 601 struct tgsi_ind_register
 602 {
 603    unsigned File    : 4;  /* TGSI_FILE_ */
 604    int      Index   : 16; /* SINT */
 605    unsigned Swizzle : 2;  /* TGSI_SWIZZLE_ */
 606    unsigned ArrayID : 10; /* UINT */
 607 };
 608
 609 /**
 610  * If tgsi_src_register::Dimension is TRUE, tgsi_dimension follows.
 611  */
 612
 613 struct tgsi_dimension
 614 {
 615    unsigned Indirect    : 1;  /* BOOL */
 616    unsigned Dimension   : 1;  /* BOOL */
 617    unsigned Padding     : 14;
 618    int      Index       : 16; /* SINT */
 619 };
 620
 621 struct tgsi_dst_register
 622 {
 623    unsigned File        : 4;  /* TGSI_FILE_ */
 624    unsigned WriteMask   : 4;  /* TGSI_WRITEMASK_ */
 625    unsigned Indirect    : 1;  /* BOOL */
 626    unsigned Dimension   : 1;  /* BOOL */
 627    int      Index       : 16; /* SINT */
 628    unsigned Padding     : 6;
 629 };
 630
 631
 632 #ifdef __cplusplus
 633 }
 634 #endif
 635
 636 #endif /* P_SHADER_TOKENS_H */