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