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