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