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_COUNT         3
 104
 105 #define TGSI_CYLINDRICAL_WRAP_X (1 << 0)
 106 #define TGSI_CYLINDRICAL_WRAP_Y (1 << 1)
 107 #define TGSI_CYLINDRICAL_WRAP_Z (1 << 2)
 108 #define TGSI_CYLINDRICAL_WRAP_W (1 << 3)
 109
 110 struct tgsi_declaration
 111 {
 112    unsigned Type        : 4;  /**< TGSI_TOKEN_TYPE_DECLARATION */
 113    unsigned NrTokens    : 8;  /**< UINT */
 114    unsigned File        : 4;  /**< one of TGSI_FILE_x */
 115    unsigned UsageMask   : 4;  /**< bitmask of TGSI_WRITEMASK_x flags */
 116    unsigned Interpolate : 4;  /**< one of TGSI_INTERPOLATE_x */
 117    unsigned Dimension   : 1;  /**< any extra dimension info? */
 118    unsigned Semantic    : 1;  /**< BOOL, any semantic info? */
 119    unsigned Centroid    : 1;  /**< centroid sampling? */
 120    unsigned Invariant   : 1;  /**< invariant optimization? */
 121    unsigned CylindricalWrap:4;   /**< TGSI_CYLINDRICAL_WRAP_x flags */
 122 };
 123
 124 struct tgsi_declaration_range
 125 {
 126    unsigned First   : 16; /**< UINT */
 127    unsigned Last    : 16; /**< UINT */
 128 };
 129
 130 struct tgsi_declaration_dimension
 131 {
 132    unsigned Index2D:16; /**< UINT */
 133    unsigned Padding:16;
 134 };
 135
 136 #define TGSI_SEMANTIC_POSITION   0
 137 #define TGSI_SEMANTIC_COLOR      1
 138 #define TGSI_SEMANTIC_BCOLOR     2  /**< back-face color */
 139 #define TGSI_SEMANTIC_FOG        3
 140 #define TGSI_SEMANTIC_PSIZE      4
 141 #define TGSI_SEMANTIC_GENERIC    5
 142 #define TGSI_SEMANTIC_NORMAL     6
 143 #define TGSI_SEMANTIC_FACE       7
 144 #define TGSI_SEMANTIC_EDGEFLAG   8
 145 #define TGSI_SEMANTIC_PRIMID     9
 146 #define TGSI_SEMANTIC_INSTANCEID 10
 147 #define TGSI_SEMANTIC_VERTEXID   11
 148 #define TGSI_SEMANTIC_STENCIL    12
 149 #define TGSI_SEMANTIC_CLIPDIST   13
 150 #define TGSI_SEMANTIC_CLIPVERTEX 14
 151 #define TGSI_SEMANTIC_COUNT      15 /**< number of semantic values */
 152
 153 struct tgsi_declaration_semantic
 154 {
 155    unsigned Name           : 8;  /**< one of TGSI_SEMANTIC_x */
 156    unsigned Index          : 16; /**< UINT */
 157    unsigned Padding        : 8;
 158 };
 159
 160 struct tgsi_declaration_resource {
 161    unsigned Resource    : 8; /**< one of TGSI_TEXTURE_ */
 162    unsigned ReturnTypeX : 6; /**< one of enum pipe_type */
 163    unsigned ReturnTypeY : 6; /**< one of enum pipe_type */
 164    unsigned ReturnTypeZ : 6; /**< one of enum pipe_type */
 165    unsigned ReturnTypeW : 6; /**< one of enum pipe_type */
 166 };
 167
 168 #define TGSI_IMM_FLOAT32   0
 169 #define TGSI_IMM_UINT32    1
 170 #define TGSI_IMM_INT32     2
 171
 172 struct tgsi_immediate
 173 {
 174    unsigned Type       : 4;  /**< TGSI_TOKEN_TYPE_IMMEDIATE */
 175    unsigned NrTokens   : 14; /**< UINT */
 176    unsigned DataType   : 4;  /**< one of TGSI_IMM_x */
 177    unsigned Padding    : 10;
 178 };
 179
 180 union tgsi_immediate_data
 181 {
 182    float Float;
 183    unsigned Uint;
 184    int Int;
 185 };
 186
 187 #define TGSI_PROPERTY_GS_INPUT_PRIM          0
 188 #define TGSI_PROPERTY_GS_OUTPUT_PRIM         1
 189 #define TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES 2
 190 #define TGSI_PROPERTY_FS_COORD_ORIGIN        3
 191 #define TGSI_PROPERTY_FS_COORD_PIXEL_CENTER  4
 192 #define TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS 5
 193 #define TGSI_PROPERTY_FS_DEPTH_LAYOUT        6
 194 #define TGSI_PROPERTY_VS_PROHIBIT_UCPS       7
 195 #define TGSI_PROPERTY_COUNT                  8
 196
 197 struct tgsi_property {
 198    unsigned Type         : 4;  /**< TGSI_TOKEN_TYPE_PROPERTY */
 199    unsigned NrTokens     : 8;  /**< UINT */
 200    unsigned PropertyName : 8;  /**< one of TGSI_PROPERTY */
 201    unsigned Padding      : 12;
 202 };
 203
 204 #define TGSI_FS_COORD_ORIGIN_UPPER_LEFT 0
 205 #define TGSI_FS_COORD_ORIGIN_LOWER_LEFT 1
 206
 207 #define TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER 0
 208 #define TGSI_FS_COORD_PIXEL_CENTER_INTEGER 1
 209
 210 #define TGSI_FS_DEPTH_LAYOUT_NONE         0
 211 #define TGSI_FS_DEPTH_LAYOUT_ANY          1
 212 #define TGSI_FS_DEPTH_LAYOUT_GREATER      2
 213 #define TGSI_FS_DEPTH_LAYOUT_LESS         3
 214 #define TGSI_FS_DEPTH_LAYOUT_UNCHANGED    4
 215
 216
 217 struct tgsi_property_data {
 218    unsigned Data;
 219 };
 220
 221 /* TGSI opcodes.
 222  *
 223  * For more information on semantics of opcodes and
 224  * which APIs are known to use which opcodes, see
 225  * gallium/docs/source/tgsi.rst
 226  */
 227 #define TGSI_OPCODE_ARL                 0
 228 #define TGSI_OPCODE_MOV                 1
 229 #define TGSI_OPCODE_LIT                 2
 230 #define TGSI_OPCODE_RCP                 3
 231 #define TGSI_OPCODE_RSQ                 4
 232 #define TGSI_OPCODE_EXP                 5
 233 #define TGSI_OPCODE_LOG                 6
 234 #define TGSI_OPCODE_MUL                 7
 235 #define TGSI_OPCODE_ADD                 8
 236 #define TGSI_OPCODE_DP3                 9
 237 #define TGSI_OPCODE_DP4                 10
 238 #define TGSI_OPCODE_DST                 11
 239 #define TGSI_OPCODE_MIN                 12
 240 #define TGSI_OPCODE_MAX                 13
 241 #define TGSI_OPCODE_SLT                 14
 242 #define TGSI_OPCODE_SGE                 15
 243 #define TGSI_OPCODE_MAD                 16
 244 #define TGSI_OPCODE_SUB                 17
 245 #define TGSI_OPCODE_LRP                 18
 246 #define TGSI_OPCODE_CND                 19
 247                                 /* gap */
 248 #define TGSI_OPCODE_DP2A                21
 249                                 /* gap */
 250 #define TGSI_OPCODE_FRC                 24
 251 #define TGSI_OPCODE_CLAMP               25
 252 #define TGSI_OPCODE_FLR                 26
 253 #define TGSI_OPCODE_ROUND               27
 254 #define TGSI_OPCODE_EX2                 28
 255 #define TGSI_OPCODE_LG2                 29
 256 #define TGSI_OPCODE_POW                 30
 257 #define TGSI_OPCODE_XPD                 31
 258                                 /* gap */
 259 #define TGSI_OPCODE_ABS                 33
 260 #define TGSI_OPCODE_RCC                 34
 261 #define TGSI_OPCODE_DPH                 35
 262 #define TGSI_OPCODE_COS                 36
 263 #define TGSI_OPCODE_DDX                 37
 264 #define TGSI_OPCODE_DDY                 38
 265 #define TGSI_OPCODE_KILP                39  /* predicated kill */
 266 #define TGSI_OPCODE_PK2H                40
 267 #define TGSI_OPCODE_PK2US               41
 268 #define TGSI_OPCODE_PK4B                42
 269 #define TGSI_OPCODE_PK4UB               43
 270 #define TGSI_OPCODE_RFL                 44
 271 #define TGSI_OPCODE_SEQ                 45
 272 #define TGSI_OPCODE_SFL                 46
 273 #define TGSI_OPCODE_SGT                 47
 274 #define TGSI_OPCODE_SIN                 48
 275 #define TGSI_OPCODE_SLE                 49
 276 #define TGSI_OPCODE_SNE                 50
 277 #define TGSI_OPCODE_STR                 51
 278 #define TGSI_OPCODE_TEX                 52
 279 #define TGSI_OPCODE_TXD                 53
 280 #define TGSI_OPCODE_TXP                 54
 281 #define TGSI_OPCODE_UP2H                55
 282 #define TGSI_OPCODE_UP2US               56
 283 #define TGSI_OPCODE_UP4B                57
 284 #define TGSI_OPCODE_UP4UB               58
 285 #define TGSI_OPCODE_X2D                 59
 286 #define TGSI_OPCODE_ARA                 60
 287 #define TGSI_OPCODE_ARR                 61
 288 #define TGSI_OPCODE_BRA                 62
 289 #define TGSI_OPCODE_CAL                 63
 290 #define TGSI_OPCODE_RET                 64
 291 #define TGSI_OPCODE_SSG                 65 /* SGN */
 292 #define TGSI_OPCODE_CMP                 66
 293 #define TGSI_OPCODE_SCS                 67
 294 #define TGSI_OPCODE_TXB                 68
 295 #define TGSI_OPCODE_NRM                 69
 296 #define TGSI_OPCODE_DIV                 70
 297 #define TGSI_OPCODE_DP2                 71
 298 #define TGSI_OPCODE_TXL                 72
 299 #define TGSI_OPCODE_BRK                 73
 300 #define TGSI_OPCODE_IF                  74
 301                                 /* gap */
 302 #define TGSI_OPCODE_ELSE                77
 303 #define TGSI_OPCODE_ENDIF               78
 304                                 /* gap */
 305 #define TGSI_OPCODE_PUSHA               81
 306 #define TGSI_OPCODE_POPA                82
 307 #define TGSI_OPCODE_CEIL                83
 308 #define TGSI_OPCODE_I2F                 84
 309 #define TGSI_OPCODE_NOT                 85
 310 #define TGSI_OPCODE_TRUNC               86
 311 #define TGSI_OPCODE_SHL                 87
 312                                 /* gap */
 313 #define TGSI_OPCODE_AND                 89
 314 #define TGSI_OPCODE_OR                  90
 315 #define TGSI_OPCODE_MOD                 91
 316 #define TGSI_OPCODE_XOR                 92
 317 #define TGSI_OPCODE_SAD                 93
 318 #define TGSI_OPCODE_TXF                 94
 319 #define TGSI_OPCODE_TXQ                 95
 320 #define TGSI_OPCODE_CONT                96
 321 #define TGSI_OPCODE_EMIT                97
 322 #define TGSI_OPCODE_ENDPRIM             98
 323 #define TGSI_OPCODE_BGNLOOP             99
 324 #define TGSI_OPCODE_BGNSUB              100
 325 #define TGSI_OPCODE_ENDLOOP             101
 326 #define TGSI_OPCODE_ENDSUB              102
 327                                 /* gap */
 328 #define TGSI_OPCODE_NOP                 107
 329                                 /* gap */
 330 #define TGSI_OPCODE_NRM4                112
 331 #define TGSI_OPCODE_CALLNZ              113
 332 #define TGSI_OPCODE_IFC                 114
 333 #define TGSI_OPCODE_BREAKC              115
 334 #define TGSI_OPCODE_KIL                 116  /* conditional kill */
 335 #define TGSI_OPCODE_END                 117  /* aka HALT */
 336                                 /* gap */
 337 #define TGSI_OPCODE_F2I                 119
 338 #define TGSI_OPCODE_IDIV                120
 339 #define TGSI_OPCODE_IMAX                121
 340 #define TGSI_OPCODE_IMIN                122
 341 #define TGSI_OPCODE_INEG                123
 342 #define TGSI_OPCODE_ISGE                124
 343 #define TGSI_OPCODE_ISHR                125
 344 #define TGSI_OPCODE_ISLT                126
 345 #define TGSI_OPCODE_F2U                 127
 346 #define TGSI_OPCODE_U2F                 128
 347 #define TGSI_OPCODE_UADD                129
 348 #define TGSI_OPCODE_UDIV                130
 349 #define TGSI_OPCODE_UMAD                131
 350 #define TGSI_OPCODE_UMAX                132
 351 #define TGSI_OPCODE_UMIN                133
 352 #define TGSI_OPCODE_UMOD                134
 353 #define TGSI_OPCODE_UMUL                135
 354 #define TGSI_OPCODE_USEQ                136
 355 #define TGSI_OPCODE_USGE                137
 356 #define TGSI_OPCODE_USHR                138
 357 #define TGSI_OPCODE_USLT                139
 358 #define TGSI_OPCODE_USNE                140
 359 #define TGSI_OPCODE_SWITCH              141
 360 #define TGSI_OPCODE_CASE                142
 361 #define TGSI_OPCODE_DEFAULT             143
 362 #define TGSI_OPCODE_ENDSWITCH           144
 363
 364 /* resource related opcodes */
 365 #define TGSI_OPCODE_LOAD                145
 366 #define TGSI_OPCODE_LOAD_MS             146
 367 #define TGSI_OPCODE_SAMPLE              147
 368 #define TGSI_OPCODE_SAMPLE_B            148
 369 #define TGSI_OPCODE_SAMPLE_C            149
 370 #define TGSI_OPCODE_SAMPLE_C_LZ         150
 371 #define TGSI_OPCODE_SAMPLE_D            151
 372 #define TGSI_OPCODE_SAMPLE_L            152
 373 #define TGSI_OPCODE_GATHER4             153
 374 #define TGSI_OPCODE_RESINFO             154
 375 #define TGSI_OPCODE_SAMPLE_POS          155
 376 #define TGSI_OPCODE_SAMPLE_INFO         156
 377
 378 #define TGSI_OPCODE_UARL                157
 379 #define TGSI_OPCODE_UCMP                158
 380 #define TGSI_OPCODE_IABS                159
 381
 382 #define TGSI_OPCODE_LAST                160
 383
 384 #define TGSI_SAT_NONE            0  /* do not saturate */
 385 #define TGSI_SAT_ZERO_ONE        1  /* clamp to [0,1] */
 386 #define TGSI_SAT_MINUS_PLUS_ONE  2  /* clamp to [-1,1] */
 387
 388 /**
 389  * Opcode is the operation code to execute. A given operation defines the
 390  * semantics how the source registers (if any) are interpreted and what is
 391  * written to the destination registers (if any) as a result of execution.
 392  *
 393  * NumDstRegs and NumSrcRegs is the number of destination and source registers,
 394  * respectively. For a given operation code, those numbers are fixed and are
 395  * present here only for convenience.
 396  *
 397  * If Predicate is TRUE, tgsi_instruction_predicate token immediately follows.
 398  *
 399  * Saturate controls how are final results in destination registers modified.
 400  */
 401
 402 struct tgsi_instruction
 403 {
 404    unsigned Type       : 4;  /* TGSI_TOKEN_TYPE_INSTRUCTION */
 405    unsigned NrTokens   : 8;  /* UINT */
 406    unsigned Opcode     : 8;  /* TGSI_OPCODE_ */
 407    unsigned Saturate   : 2;  /* TGSI_SAT_ */
 408    unsigned NumDstRegs : 2;  /* UINT */
 409    unsigned NumSrcRegs : 4;  /* UINT */
 410    unsigned Predicate  : 1;  /* BOOL */
 411    unsigned Label      : 1;
 412    unsigned Texture    : 1;
 413    unsigned Padding    : 1;
 414 };
 415
 416 /*
 417  * If tgsi_instruction::Label is TRUE, tgsi_instruction_label follows.
 418  *
 419  * If tgsi_instruction::Texture is TRUE, tgsi_instruction_texture follows.
 420  *   if texture instruction has a number of offsets,
 421  *   then tgsi_instruction::Texture::NumOffset of tgsi_texture_offset follow.
 422  *
 423  * Then, tgsi_instruction::NumDstRegs of tgsi_dst_register follow.
 424  *
 425  * Then, tgsi_instruction::NumSrcRegs of tgsi_src_register follow.
 426  *
 427  * tgsi_instruction::NrTokens contains the total number of words that make the
 428  * instruction, including the instruction word.
 429  */
 430
 431 #define TGSI_SWIZZLE_X      0
 432 #define TGSI_SWIZZLE_Y      1
 433 #define TGSI_SWIZZLE_Z      2
 434 #define TGSI_SWIZZLE_W      3
 435
 436 struct tgsi_instruction_label
 437 {
 438    unsigned Label    : 24;   /* UINT */
 439    unsigned Padding  : 8;
 440 };
 441
 442 #define TGSI_TEXTURE_UNKNOWN        0
 443 #define TGSI_TEXTURE_1D             1
 444 #define TGSI_TEXTURE_2D             2
 445 #define TGSI_TEXTURE_3D             3
 446 #define TGSI_TEXTURE_CUBE           4
 447 #define TGSI_TEXTURE_RECT           5
 448 #define TGSI_TEXTURE_SHADOW1D       6
 449 #define TGSI_TEXTURE_SHADOW2D       7
 450 #define TGSI_TEXTURE_SHADOWRECT     8
 451 #define TGSI_TEXTURE_1D_ARRAY       9
 452 #define TGSI_TEXTURE_2D_ARRAY       10
 453 #define TGSI_TEXTURE_SHADOW1D_ARRAY 11
 454 #define TGSI_TEXTURE_SHADOW2D_ARRAY 12
 455 #define TGSI_TEXTURE_COUNT          13
 456
 457 struct tgsi_instruction_texture
 458 {
 459    unsigned Texture  : 8;    /* TGSI_TEXTURE_ */
 460    unsigned NumOffsets : 4;
 461    unsigned Padding : 20;
 462 };
 463
 464 /* for texture offsets in GLSL and DirectX.
 465  * Generally these always come from TGSI_FILE_IMMEDIATE,
 466  * however DX11 appears to have the capability to do
 467  * non-constant texture offsets.
 468  */
 469 struct tgsi_texture_offset
 470 {
 471    int      Index    : 16;
 472    unsigned File     : 4;  /**< one of TGSI_FILE_x */
 473    unsigned SwizzleX : 2;  /* TGSI_SWIZZLE_x */
 474    unsigned SwizzleY : 2;  /* TGSI_SWIZZLE_x */
 475    unsigned SwizzleZ : 2;  /* TGSI_SWIZZLE_x */
 476    unsigned Padding  : 6;
 477 };
 478
 479 /*
 480  * For SM3, the following constraint applies.
 481  *   - Swizzle is either set to identity or replicate.
 482  */
 483 struct tgsi_instruction_predicate
 484 {
 485    int      Index    : 16; /* SINT */
 486    unsigned SwizzleX : 2;  /* TGSI_SWIZZLE_x */
 487    unsigned SwizzleY : 2;  /* TGSI_SWIZZLE_x */
 488    unsigned SwizzleZ : 2;  /* TGSI_SWIZZLE_x */
 489    unsigned SwizzleW : 2;  /* TGSI_SWIZZLE_x */
 490    unsigned Negate   : 1;  /* BOOL */
 491    unsigned Padding  : 7;
 492 };
 493
 494 /**
 495  * File specifies the register array to access.
 496  *
 497  * Index specifies the element number of a register in the register file.
 498  *
 499  * If Indirect is TRUE, Index should be offset by the X component of a source
 500  * register that follows. The register can be now fetched into local storage
 501  * for further processing.
 502  *
 503  * If Negate is TRUE, all components of the fetched register are negated.
 504  *
 505  * The fetched register components are swizzled according to SwizzleX, SwizzleY,
 506  * SwizzleZ and SwizzleW.
 507  *
 508  */
 509
 510 struct tgsi_src_register
 511 {
 512    unsigned File        : 4;  /* TGSI_FILE_ */
 513    unsigned Indirect    : 1;  /* BOOL */
 514    unsigned Dimension   : 1;  /* BOOL */
 515    int      Index       : 16; /* SINT */
 516    unsigned SwizzleX    : 2;  /* TGSI_SWIZZLE_ */
 517    unsigned SwizzleY    : 2;  /* TGSI_SWIZZLE_ */
 518    unsigned SwizzleZ    : 2;  /* TGSI_SWIZZLE_ */
 519    unsigned SwizzleW    : 2;  /* TGSI_SWIZZLE_ */
 520    unsigned Absolute    : 1;    /* BOOL */
 521    unsigned Negate      : 1;    /* BOOL */
 522 };
 523
 524 /**
 525  * If tgsi_src_register::Modifier is TRUE, tgsi_src_register_modifier follows.
 526  *
 527  * Then, if tgsi_src_register::Indirect is TRUE, another tgsi_src_register
 528  * follows.
 529  *
 530  * Then, if tgsi_src_register::Dimension is TRUE, tgsi_dimension follows.
 531  */
 532
 533
 534 struct tgsi_dimension
 535 {
 536    unsigned Indirect    : 1;  /* BOOL */
 537    unsigned Dimension   : 1;  /* BOOL */
 538    unsigned Padding     : 14;
 539    int      Index       : 16; /* SINT */
 540 };
 541
 542 struct tgsi_dst_register
 543 {
 544    unsigned File        : 4;  /* TGSI_FILE_ */
 545    unsigned WriteMask   : 4;  /* TGSI_WRITEMASK_ */
 546    unsigned Indirect    : 1;  /* BOOL */
 547    unsigned Dimension   : 1;  /* BOOL */
 548    int      Index       : 16; /* SINT */
 549    unsigned Padding     : 6;
 550 };
 551
 552
 553 #ifdef __cplusplus
 554 }
 555 #endif
 556
 557 #endif /* P_SHADER_TOKENS_H */