src/gallium/auxiliary/gallivm/lp_bld_tgsi.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2011-2012 Advanced Micro Devices, Inc.
   4  * Copyright 2009 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 VMWARE 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 /**
  30  * @file
  31  * TGSI to LLVM IR translation.
  32  *
  33  * @author Jose Fonseca <jfonseca@vmware.com>
  34  * @author Tom Stellard <thomas.stellard@amd.com>
  35  */
  36
  37 #ifndef LP_BLD_TGSI_H
  38 #define LP_BLD_TGSI_H
  39
  40 #include "gallivm/lp_bld.h"
  41 #include "gallivm/lp_bld_tgsi_action.h"
  42 #include "gallivm/lp_bld_limits.h"
  43 #include "gallivm/lp_bld_sample.h"
  44 #include "lp_bld_type.h"
  45 #include "pipe/p_compiler.h"
  46 #include "pipe/p_state.h"
  47 #include "tgsi/tgsi_exec.h"
  48 #include "tgsi/tgsi_scan.h"
  49 #include "tgsi/tgsi_info.h"
  50
  51 #define LP_CHAN_ALL ~0
  52
  53 #define LP_MAX_INSTRUCTIONS 256
  54
  55 struct tgsi_full_declaration;
  56 struct tgsi_full_immediate;
  57 struct tgsi_full_instruction;
  58 struct tgsi_full_src_register;
  59 struct tgsi_opcode_info;
  60 struct tgsi_token;
  61 struct tgsi_shader_info;
  62 struct lp_build_mask_context;
  63 struct gallivm_state;
  64 struct lp_derivatives;
  65 struct lp_build_tgsi_gs_iface;
  66
  67
  68 enum lp_build_tex_modifier {
  69    LP_BLD_TEX_MODIFIER_NONE = 0,
  70    LP_BLD_TEX_MODIFIER_PROJECTED,
  71    LP_BLD_TEX_MODIFIER_LOD_BIAS,
  72    LP_BLD_TEX_MODIFIER_EXPLICIT_LOD,
  73    LP_BLD_TEX_MODIFIER_EXPLICIT_DERIV,
  74    LP_BLD_TEX_MODIFIER_LOD_ZERO
  75 };
  76
  77
  78 /**
  79  * Describe a channel of a register.
  80  *
  81  * The value can be a:
  82  * - immediate value (i.e. derived from a IMM register)
  83  * - CONST[n].x/y/z/w
  84  * - IN[n].x/y/z/w
  85  * - undetermined (when .file == TGSI_FILE_NULL)
  86  *
  87  * This is one of the analysis results, and is used to described
  88  * the output color in terms of inputs.
  89  */
  90 struct lp_tgsi_channel_info
  91 {
  92    unsigned file:4; /* TGSI_FILE_* */
  93    unsigned swizzle:3; /* PIPE_SWIZZLE_x */
  94    union {
  95       uint32_t index;
  96       float value; /* for TGSI_FILE_IMMEDIATE */
  97    } u;
  98 };
  99
 100
 101 /**
 102  * Describe a texture sampler interpolator.
 103  *
 104  * The interpolation is described in terms of regular inputs.
 105  */
 106 struct lp_tgsi_texture_info
 107 {
 108    struct lp_tgsi_channel_info coord[4];
 109    unsigned target:8; /* TGSI_TEXTURE_* */
 110    unsigned sampler_unit:8;  /* Sampler unit */
 111    unsigned texture_unit:8;  /* Texture unit */
 112    unsigned modifier:8; /* LP_BLD_TEX_MODIFIER_* */
 113 };
 114
 115
 116 struct lp_tgsi_info
 117 {
 118    struct tgsi_shader_info base;
 119
 120    /*
 121     * Whether any of the texture opcodes access a register file other than
 122     * TGSI_FILE_INPUT.
 123     *
 124     * We could also handle TGSI_FILE_CONST/IMMEDIATE here, but there is little
 125     * benefit.
 126     */
 127    unsigned indirect_textures:1;
 128
 129    /*
 130     * Whether any immediate values are outside the range of 0 and 1
 131     */
 132    unsigned unclamped_immediates:1;
 133
 134    /*
 135     * Texture opcode description. Aimed at detecting and described direct
 136     * texture opcodes.
 137     */
 138    unsigned num_texs;
 139    struct lp_tgsi_texture_info tex[PIPE_MAX_SAMPLERS];
 140
 141    /*
 142     * Output description. Aimed at detecting and describing simple blit
 143     * shaders.
 144     */
 145    struct lp_tgsi_channel_info output[PIPE_MAX_SHADER_OUTPUTS][4];
 146
 147    /*
 148     * Shortcut pointers into the above (for fragment shaders).
 149     */
 150    const struct lp_tgsi_channel_info *cbuf[PIPE_MAX_COLOR_BUFS];
 151 };
 152
 153 /**
 154  * Reference to system values.
 155  */
 156 struct lp_bld_tgsi_system_values {
 157    LLVMValueRef instance_id;
 158    LLVMValueRef vertex_id;
 159    LLVMValueRef prim_id;
 160 };
 161
 162
 163 /**
 164  * Sampler code generation interface.
 165  *
 166  * Although texture sampling is a requirement for TGSI translation, it is
 167  * a very different problem with several different approaches to it. This
 168  * structure establishes an interface for texture sampling code generation, so
 169  * that we can easily use different texture sampling strategies.
 170  */
 171 struct lp_build_sampler_soa
 172 {
 173    void
 174    (*destroy)( struct lp_build_sampler_soa *sampler );
 175
 176    void
 177    (*emit_fetch_texel)( const struct lp_build_sampler_soa *sampler,
 178                         struct gallivm_state *gallivm,
 179                         struct lp_type type,
 180                         boolean is_fetch,
 181                         unsigned texture_index,
 182                         unsigned sampler_index,
 183                         const LLVMValueRef *coords,
 184                         const LLVMValueRef *offsets,
 185                         const struct lp_derivatives *derivs,
 186                         LLVMValueRef lod_bias, /* optional */
 187                         LLVMValueRef explicit_lod, /* optional */
 188                         enum lp_sampler_lod_property,
 189                         LLVMValueRef *texel);
 190
 191    void
 192    (*emit_size_query)( const struct lp_build_sampler_soa *sampler,
 193                        struct gallivm_state *gallivm,
 194                        struct lp_type type,
 195                        unsigned unit,
 196                        unsigned target,
 197                        boolean need_nr_mips,
 198                        enum lp_sampler_lod_property,
 199                        LLVMValueRef explicit_lod, /* optional */
 200                        LLVMValueRef *sizes_out);
 201 };
 202
 203
 204 struct lp_build_sampler_aos
 205 {
 206    LLVMValueRef
 207    (*emit_fetch_texel)( struct lp_build_sampler_aos *sampler,
 208                         struct lp_build_context *bld,
 209                         unsigned target, /* TGSI_TEXTURE_* */
 210                         unsigned unit,
 211                         LLVMValueRef coords,
 212                         const struct lp_derivatives derivs,
 213                         enum lp_build_tex_modifier modifier);
 214 };
 215
 216
 217 void
 218 lp_build_tgsi_info(const struct tgsi_token *tokens,
 219                    struct lp_tgsi_info *info);
 220
 221
 222 void
 223 lp_build_tgsi_soa(struct gallivm_state *gallivm,
 224                   const struct tgsi_token *tokens,
 225                   struct lp_type type,
 226                   struct lp_build_mask_context *mask,
 227                   LLVMValueRef consts_ptr,
 228                   const struct lp_bld_tgsi_system_values *system_values,
 229                   const LLVMValueRef (*inputs)[4],
 230                   LLVMValueRef (*outputs)[4],
 231                   struct lp_build_sampler_soa *sampler,
 232                   const struct tgsi_shader_info *info,
 233                   const struct lp_build_tgsi_gs_iface *gs_iface);
 234
 235
 236 void
 237 lp_build_tgsi_aos(struct gallivm_state *gallivm,
 238                   const struct tgsi_token *tokens,
 239                   struct lp_type type,
 240                   const unsigned char swizzles[4],
 241                   LLVMValueRef consts_ptr,
 242                   const LLVMValueRef *inputs,
 243                   LLVMValueRef *outputs,
 244                   struct lp_build_sampler_aos *sampler,
 245                   const struct tgsi_shader_info *info);
 246
 247
 248 enum lp_exec_mask_break_type {
 249    LP_EXEC_MASK_BREAK_TYPE_LOOP,
 250    LP_EXEC_MASK_BREAK_TYPE_SWITCH
 251 };
 252
 253
 254 struct lp_exec_mask {
 255    struct lp_build_context *bld;
 256
 257    boolean has_mask;
 258    boolean ret_in_main;
 259
 260    LLVMTypeRef int_vec_type;
 261
 262    LLVMValueRef cond_stack[LP_MAX_TGSI_NESTING];
 263    int cond_stack_size;
 264    LLVMValueRef cond_mask;
 265
 266    /* keep track if break belongs to switch or loop */
 267    enum lp_exec_mask_break_type break_type_stack[LP_MAX_TGSI_NESTING];
 268    enum lp_exec_mask_break_type break_type;
 269
 270    struct {
 271       LLVMValueRef switch_val;
 272       LLVMValueRef switch_mask;
 273       LLVMValueRef switch_mask_default;
 274       boolean switch_in_default;
 275       unsigned switch_pc;
 276    } switch_stack[LP_MAX_TGSI_NESTING];
 277    int switch_stack_size;
 278    LLVMValueRef switch_val;
 279    LLVMValueRef switch_mask;         /* current switch exec mask */
 280    LLVMValueRef switch_mask_default; /* reverse of switch mask used for default */
 281    boolean switch_in_default;        /* if switch exec is currently in default */
 282    unsigned switch_pc;               /* when used points to default or endswitch-1 */
 283
 284    LLVMBasicBlockRef loop_block;
 285    LLVMValueRef cont_mask;
 286    LLVMValueRef break_mask;
 287    LLVMValueRef break_var;
 288    struct {
 289       LLVMBasicBlockRef loop_block;
 290       LLVMValueRef cont_mask;
 291       LLVMValueRef break_mask;
 292       LLVMValueRef break_var;
 293    } loop_stack[LP_MAX_TGSI_NESTING];
 294    int loop_stack_size;
 295
 296    LLVMValueRef ret_mask;
 297    struct {
 298       int pc;
 299       LLVMValueRef ret_mask;
 300    } call_stack[LP_MAX_TGSI_NESTING];
 301    int call_stack_size;
 302
 303    LLVMValueRef exec_mask;
 304    LLVMValueRef loop_limiter;
 305 };
 306
 307 struct lp_build_tgsi_inst_list
 308 {
 309    struct tgsi_full_instruction *instructions;
 310    uint max_instructions;
 311    uint num_instructions;
 312 };
 313
 314 unsigned lp_bld_tgsi_list_init(struct lp_build_tgsi_context * bld_base);
 315
 316
 317 unsigned lp_bld_tgsi_add_instruction(
 318    struct lp_build_tgsi_context * bld_base,
 319    struct tgsi_full_instruction *inst_to_add);
 320
 321
 322 struct lp_build_tgsi_context;
 323
 324
 325 typedef LLVMValueRef (*lp_build_emit_fetch_fn)(struct lp_build_tgsi_context *,
 326                                         const struct tgsi_full_src_register *,
 327                                         enum tgsi_opcode_type,
 328                                         unsigned);
 329
 330 struct lp_build_tgsi_context
 331 {
 332    struct lp_build_context base;
 333
 334    struct lp_build_context uint_bld;
 335    struct lp_build_context int_bld;
 336
 337    /** This array stores functions that are used to transform TGSI opcodes to
 338      * LLVM instructions.
 339      */
 340    struct lp_build_tgsi_action op_actions[TGSI_OPCODE_LAST];
 341
 342    /* TGSI_OPCODE_RSQ is defined as 1 / sqrt( abs(src0.x) ), rsq_action
 343     * should compute 1 / sqrt (src0.x) */
 344    struct lp_build_tgsi_action rsq_action;
 345
 346    struct lp_build_tgsi_action sqrt_action;
 347
 348    const struct tgsi_shader_info *info;
 349
 350    lp_build_emit_fetch_fn emit_fetch_funcs[TGSI_FILE_COUNT];
 351
 352    LLVMValueRef (*emit_swizzle)(struct lp_build_tgsi_context *,
 353                          LLVMValueRef, unsigned, unsigned, unsigned, unsigned);
 354
 355
 356    void (*emit_debug)(struct lp_build_tgsi_context *,
 357                       const struct tgsi_full_instruction *,
 358                       const struct tgsi_opcode_info *);
 359
 360    void (*emit_store)(struct lp_build_tgsi_context *,
 361                       const struct tgsi_full_instruction *,
 362                       const struct tgsi_opcode_info *,
 363                       LLVMValueRef dst[4]);
 364
 365    void (*emit_declaration)(struct lp_build_tgsi_context *,
 366                              const struct tgsi_full_declaration *decl);
 367
 368    void (*emit_immediate)(struct lp_build_tgsi_context *,
 369                           const struct tgsi_full_immediate *imm);
 370
 371
 372    /* Allow the user to store data in this structure rather than passing it
 373     * to every function. */
 374    void * userdata;
 375
 376    boolean soa;
 377
 378    int pc;
 379
 380    struct tgsi_full_instruction *instructions;
 381    uint max_instructions;
 382    uint num_instructions;
 383
 384    /** This function allows the user to insert some instructions at the
 385      * beginning of the program.  It is optional and does not need to be
 386      * implemented.
 387      */
 388    void (*emit_prologue)(struct lp_build_tgsi_context*);
 389
 390    /** This function allows the user to insert some instructions at the end of
 391      * the program.  This callback is intended to be used for emitting
 392      * instructions to handle the export for the output registers, but it can
 393      * be used for any purpose.  Implementing this function is optiona, but
 394      * recommended.
 395      */
 396    void (*emit_epilogue)(struct lp_build_tgsi_context*);
 397 };
 398
 399 struct lp_build_tgsi_gs_iface
 400 {
 401    LLVMValueRef (*fetch_input)(const struct lp_build_tgsi_gs_iface *gs_iface,
 402                                struct lp_build_tgsi_context * bld_base,
 403                                boolean is_vindex_indirect,
 404                                LLVMValueRef vertex_index,
 405                                boolean is_aindex_indirect,
 406                                LLVMValueRef attrib_index,
 407                                LLVMValueRef swizzle_index);
 408    void (*emit_vertex)(const struct lp_build_tgsi_gs_iface *gs_iface,
 409                        struct lp_build_tgsi_context * bld_base,
 410                        LLVMValueRef (*outputs)[4],
 411                        LLVMValueRef emitted_vertices_vec);
 412    void (*end_primitive)(const struct lp_build_tgsi_gs_iface *gs_iface,
 413                          struct lp_build_tgsi_context * bld_base,
 414                          LLVMValueRef verts_per_prim_vec,
 415                          LLVMValueRef emitted_prims_vec);
 416    void (*gs_epilogue)(const struct lp_build_tgsi_gs_iface *gs_iface,
 417                        struct lp_build_tgsi_context * bld_base,
 418                        LLVMValueRef total_emitted_vertices_vec,
 419                        LLVMValueRef emitted_prims_vec);
 420 };
 421
 422 struct lp_build_tgsi_soa_context
 423 {
 424    struct lp_build_tgsi_context bld_base;
 425
 426    /* Builder for scalar elements of shader's data type (float) */
 427    struct lp_build_context elem_bld;
 428
 429    const struct lp_build_tgsi_gs_iface *gs_iface;
 430    LLVMValueRef emitted_prims_vec_ptr;
 431    LLVMValueRef total_emitted_vertices_vec_ptr;
 432    LLVMValueRef emitted_vertices_vec_ptr;
 433    LLVMValueRef max_output_vertices_vec;
 434
 435    LLVMValueRef consts_ptr;
 436    const LLVMValueRef (*inputs)[TGSI_NUM_CHANNELS];
 437    LLVMValueRef (*outputs)[TGSI_NUM_CHANNELS];
 438
 439    const struct lp_build_sampler_soa *sampler;
 440
 441    struct tgsi_declaration_sampler_view sv[PIPE_MAX_SHADER_SAMPLER_VIEWS];
 442
 443    LLVMValueRef immediates[LP_MAX_TGSI_IMMEDIATES][TGSI_NUM_CHANNELS];
 444    LLVMValueRef temps[LP_MAX_TGSI_TEMPS][TGSI_NUM_CHANNELS];
 445    LLVMValueRef addr[LP_MAX_TGSI_ADDRS][TGSI_NUM_CHANNELS];
 446    LLVMValueRef preds[LP_MAX_TGSI_PREDS][TGSI_NUM_CHANNELS];
 447
 448    /* We allocate/use this array of temps if (1 << TGSI_FILE_TEMPORARY) is
 449     * set in the indirect_files field.
 450     * The temps[] array above is unused then.
 451     */
 452    LLVMValueRef temps_array;
 453
 454    /* We allocate/use this array of output if (1 << TGSI_FILE_OUTPUT) is
 455     * set in the indirect_files field.
 456     * The outputs[] array above is unused then.
 457     */
 458    LLVMValueRef outputs_array;
 459
 460    /* We allocate/use this array of inputs if (1 << TGSI_FILE_INPUT) is
 461     * set in the indirect_files field.
 462     * The inputs[] array above is unused then.
 463     */
 464    LLVMValueRef inputs_array;
 465
 466    /* We allocate/use this array of temps if (1 << TGSI_FILE_IMMEDIATE) is
 467     * set in the indirect_files field.
 468     */
 469    LLVMValueRef imms_array;
 470
 471
 472    struct lp_bld_tgsi_system_values system_values;
 473
 474    /** bitmask indicating which register files are accessed indirectly */
 475    unsigned indirect_files;
 476
 477    struct lp_build_mask_context *mask;
 478    struct lp_exec_mask exec_mask;
 479
 480    uint num_immediates;
 481
 482 };
 483
 484 void
 485 lp_emit_declaration_soa(
 486    struct lp_build_tgsi_context *bld,
 487    const struct tgsi_full_declaration *decl);
 488
 489 void lp_emit_immediate_soa(
 490    struct lp_build_tgsi_context *bld_base,
 491    const struct tgsi_full_immediate *imm);
 492
 493 boolean
 494 lp_emit_instruction_soa(
 495    struct lp_build_tgsi_soa_context *bld,
 496    const struct tgsi_full_instruction *inst,
 497    const struct tgsi_opcode_info *info);
 498
 499
 500 LLVMValueRef
 501 lp_get_temp_ptr_soa(
 502    struct lp_build_tgsi_soa_context *bld,
 503    unsigned index,
 504    unsigned chan);
 505
 506 LLVMValueRef
 507 lp_get_output_ptr(
 508    struct lp_build_tgsi_soa_context *bld,
 509    unsigned index,
 510    unsigned chan);
 511
 512 struct lp_build_tgsi_aos_context
 513 {
 514    struct lp_build_tgsi_context bld_base;
 515
 516    /* Builder for integer masks and indices */
 517    struct lp_build_context int_bld;
 518
 519    /*
 520     * AoS swizzle used:
 521     * - swizzles[0] = red index
 522     * - swizzles[1] = green index
 523     * - swizzles[2] = blue index
 524     * - swizzles[3] = alpha index
 525     */
 526    unsigned char swizzles[4];
 527    unsigned char inv_swizzles[4];
 528
 529    LLVMValueRef consts_ptr;
 530    const LLVMValueRef *inputs;
 531    LLVMValueRef *outputs;
 532
 533    struct lp_build_sampler_aos *sampler;
 534
 535    LLVMValueRef immediates[LP_MAX_TGSI_IMMEDIATES];
 536    LLVMValueRef temps[LP_MAX_TGSI_TEMPS];
 537    LLVMValueRef addr[LP_MAX_TGSI_ADDRS];
 538    LLVMValueRef preds[LP_MAX_TGSI_PREDS];
 539
 540    /* We allocate/use this array of temps if (1 << TGSI_FILE_TEMPORARY) is
 541     * set in the indirect_files field.
 542     * The temps[] array above is unused then.
 543     */
 544    LLVMValueRef temps_array;
 545
 546    /** bitmask indicating which register files are accessed indirectly */
 547    unsigned indirect_files;
 548
 549 };
 550
 551 static INLINE struct lp_build_tgsi_soa_context *
 552 lp_soa_context(struct lp_build_tgsi_context *bld_base)
 553 {
 554    return (struct lp_build_tgsi_soa_context *)bld_base;
 555 }
 556
 557 static INLINE struct lp_build_tgsi_aos_context *
 558 lp_aos_context(struct lp_build_tgsi_context *bld_base)
 559 {
 560    return (struct lp_build_tgsi_aos_context *)bld_base;
 561 }
 562
 563 void
 564 lp_emit_declaration_aos(
 565    struct lp_build_tgsi_aos_context *bld,
 566    const struct tgsi_full_declaration *decl);
 567
 568
 569 boolean
 570 lp_emit_instruction_aos(
 571    struct lp_build_tgsi_aos_context *bld,
 572    const struct tgsi_full_instruction *inst,
 573    const struct tgsi_opcode_info *info,
 574    int *pc);
 575
 576 void
 577 lp_emit_store_aos(
 578    struct lp_build_tgsi_aos_context *bld,
 579    const struct tgsi_full_instruction *inst,
 580    unsigned index,
 581    LLVMValueRef value);
 582
 583 void lp_build_fetch_args(
 584    struct lp_build_tgsi_context * bld_base,
 585    struct lp_build_emit_data * emit_data);
 586
 587 LLVMValueRef
 588 lp_build_tgsi_inst_llvm_aos(
 589    struct lp_build_tgsi_context * bld_base,
 590    const struct tgsi_full_instruction *inst);
 591
 592 void
 593 lp_build_tgsi_intrinsic(
 594  const struct lp_build_tgsi_action * action,
 595  struct lp_build_tgsi_context * bld_base,
 596  struct lp_build_emit_data * emit_data);
 597
 598 LLVMValueRef
 599 lp_build_emit_llvm(
 600    struct lp_build_tgsi_context *bld_base,
 601    unsigned tgsi_opcode,
 602    struct lp_build_emit_data * emit_data);
 603
 604 LLVMValueRef
 605 lp_build_emit_llvm_unary(
 606    struct lp_build_tgsi_context *bld_base,
 607    unsigned tgsi_opcode,
 608    LLVMValueRef arg0);
 609
 610 LLVMValueRef
 611 lp_build_emit_llvm_binary(
 612    struct lp_build_tgsi_context *bld_base,
 613    unsigned tgsi_opcode,
 614    LLVMValueRef arg0,
 615    LLVMValueRef arg1);
 616
 617 LLVMValueRef
 618 lp_build_emit_llvm_ternary(
 619    struct lp_build_tgsi_context *bld_base,
 620    unsigned tgsi_opcode,
 621    LLVMValueRef arg0,
 622    LLVMValueRef arg1,
 623    LLVMValueRef arg2);
 624
 625 boolean
 626 lp_build_tgsi_inst_llvm(
 627    struct lp_build_tgsi_context * bld_base,
 628    const struct tgsi_full_instruction *inst);
 629
 630 LLVMValueRef
 631 lp_build_emit_fetch(
 632    struct lp_build_tgsi_context *bld_base,
 633    const struct tgsi_full_instruction *inst,
 634    unsigned src_op,
 635    const unsigned chan_index);
 636
 637
 638 LLVMValueRef
 639 lp_build_emit_fetch_texoffset(
 640    struct lp_build_tgsi_context *bld_base,
 641    const struct tgsi_full_instruction *inst,
 642    unsigned tex_off_op,
 643    const unsigned chan_index);
 644
 645 boolean
 646 lp_build_tgsi_llvm(
 647    struct lp_build_tgsi_context * bld_base,
 648    const struct tgsi_token *tokens);
 649
 650 #endif /* LP_BLD_TGSI_H */