src/compiler/spirv/vtn_private.h

   1 /*
   2  * Copyright © 2015 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Jason Ekstrand (jason@jlekstrand.net)
  25  *
  26  */
  27
  28 #ifndef _VTN_PRIVATE_H_
  29 #define _VTN_PRIVATE_H_
  30
  31 #include <setjmp.h>
  32
  33 #include "nir/nir.h"
  34 #include "nir/nir_builder.h"
  35 #include "util/u_dynarray.h"
  36 #include "nir_spirv.h"
  37 #include "spirv.h"
  38
  39 struct vtn_builder;
  40 struct vtn_decoration;
  41
  42 void vtn_log(struct vtn_builder *b, enum nir_spirv_debug_level level,
  43              size_t spirv_offset, const char *message);
  44
  45 void vtn_logf(struct vtn_builder *b, enum nir_spirv_debug_level level,
  46               size_t spirv_offset, const char *fmt, ...) PRINTFLIKE(4, 5);
  47
  48 #define vtn_info(...) vtn_logf(b, NIR_SPIRV_DEBUG_LEVEL_INFO, 0, __VA_ARGS__)
  49
  50 void _vtn_warn(struct vtn_builder *b, const char *file, unsigned line,
  51                const char *fmt, ...) PRINTFLIKE(4, 5);
  52 #define vtn_warn(...) _vtn_warn(b, __FILE__, __LINE__, __VA_ARGS__)
  53
  54 void _vtn_err(struct vtn_builder *b, const char *file, unsigned line,
  55                const char *fmt, ...) PRINTFLIKE(4, 5);
  56 #define vtn_err(...) _vtn_err(b, __FILE__, __LINE__, __VA_ARGS__)
  57
  58 /** Fail SPIR-V parsing
  59  *
  60  * This function logs an error and then bails out of the shader compile using
  61  * longjmp.  This being safe relies on two things:
  62  *
  63  *  1) We must guarantee that setjmp is called after allocating the builder
  64  *     and setting up b->debug (so that logging works) but before before any
  65  *     errors have a chance to occur.
  66  *
  67  *  2) While doing the SPIR-V -> NIR conversion, we need to be careful to
  68  *     ensure that all heap allocations happen through ralloc and are parented
  69  *     to the builder.  This way they will get properly cleaned up on error.
  70  *
  71  *  3) We must ensure that _vtn_fail is never called while a mutex lock or a
  72  *     reference to any other resource is held with the exception of ralloc
  73  *     objects which are parented to the builder.
  74  *
  75  * So long as these two things continue to hold, we can easily longjmp back to
  76  * spirv_to_nir(), clean up the builder, and return NULL.
  77  */
  78 NORETURN void
  79 _vtn_fail(struct vtn_builder *b, const char *file, unsigned line,
  80              const char *fmt, ...) PRINTFLIKE(4, 5);
  81
  82 #define vtn_fail(...) _vtn_fail(b, __FILE__, __LINE__, __VA_ARGS__)
  83
  84 /** Fail if the given expression evaluates to true */
  85 #define vtn_fail_if(expr, ...) \
  86    do { \
  87       if (unlikely(expr)) \
  88          vtn_fail(__VA_ARGS__); \
  89    } while (0)
  90
  91 /** Assert that a condition is true and, if it isn't, vtn_fail
  92  *
  93  * This macro is transitional only and should not be used in new code.  Use
  94  * vtn_fail_if and provide a real message instead.
  95  */
  96 #define vtn_assert(expr) \
  97    do { \
  98       if (!likely(expr)) \
  99          vtn_fail("%s", #expr); \
 100    } while (0)
 101
 102 enum vtn_value_type {
 103    vtn_value_type_invalid = 0,
 104    vtn_value_type_undef,
 105    vtn_value_type_string,
 106    vtn_value_type_decoration_group,
 107    vtn_value_type_type,
 108    vtn_value_type_constant,
 109    vtn_value_type_pointer,
 110    vtn_value_type_function,
 111    vtn_value_type_block,
 112    vtn_value_type_ssa,
 113    vtn_value_type_extension,
 114    vtn_value_type_image_pointer,
 115    vtn_value_type_sampled_image,
 116 };
 117
 118 enum vtn_branch_type {
 119    vtn_branch_type_none,
 120    vtn_branch_type_switch_break,
 121    vtn_branch_type_switch_fallthrough,
 122    vtn_branch_type_loop_break,
 123    vtn_branch_type_loop_continue,
 124    vtn_branch_type_discard,
 125    vtn_branch_type_return,
 126 };
 127
 128 enum vtn_cf_node_type {
 129    vtn_cf_node_type_block,
 130    vtn_cf_node_type_if,
 131    vtn_cf_node_type_loop,
 132    vtn_cf_node_type_switch,
 133 };
 134
 135 struct vtn_cf_node {
 136    struct list_head link;
 137    enum vtn_cf_node_type type;
 138 };
 139
 140 struct vtn_loop {
 141    struct vtn_cf_node node;
 142
 143    /* The main body of the loop */
 144    struct list_head body;
 145
 146    /* The "continue" part of the loop.  This gets executed after the body
 147     * and is where you go when you hit a continue.
 148     */
 149    struct list_head cont_body;
 150
 151    SpvLoopControlMask control;
 152 };
 153
 154 struct vtn_if {
 155    struct vtn_cf_node node;
 156
 157    uint32_t condition;
 158
 159    enum vtn_branch_type then_type;
 160    struct list_head then_body;
 161
 162    enum vtn_branch_type else_type;
 163    struct list_head else_body;
 164
 165    SpvSelectionControlMask control;
 166 };
 167
 168 struct vtn_case {
 169    struct list_head link;
 170
 171    struct list_head body;
 172
 173    /* The block that starts this case */
 174    struct vtn_block *start_block;
 175
 176    /* The fallthrough case, if any */
 177    struct vtn_case *fallthrough;
 178
 179    /* The uint32_t values that map to this case */
 180    struct util_dynarray values;
 181
 182    /* True if this is the default case */
 183    bool is_default;
 184
 185    /* Initialized to false; used when sorting the list of cases */
 186    bool visited;
 187 };
 188
 189 struct vtn_switch {
 190    struct vtn_cf_node node;
 191
 192    uint32_t selector;
 193
 194    struct list_head cases;
 195 };
 196
 197 struct vtn_block {
 198    struct vtn_cf_node node;
 199
 200    /** A pointer to the label instruction */
 201    const uint32_t *label;
 202
 203    /** A pointer to the merge instruction (or NULL if non exists) */
 204    const uint32_t *merge;
 205
 206    /** A pointer to the branch instruction that ends this block */
 207    const uint32_t *branch;
 208
 209    enum vtn_branch_type branch_type;
 210
 211    /** Points to the loop that this block starts (if it starts a loop) */
 212    struct vtn_loop *loop;
 213
 214    /** Points to the switch case started by this block (if any) */
 215    struct vtn_case *switch_case;
 216
 217    /** Every block ends in a nop intrinsic so that we can find it again */
 218    nir_intrinsic_instr *end_nop;
 219 };
 220
 221 struct vtn_function {
 222    struct exec_node node;
 223
 224    struct vtn_type *type;
 225
 226    bool referenced;
 227    bool emitted;
 228
 229    nir_function_impl *impl;
 230    struct vtn_block *start_block;
 231
 232    struct list_head body;
 233
 234    const uint32_t *end;
 235
 236    SpvFunctionControlMask control;
 237 };
 238
 239 typedef bool (*vtn_instruction_handler)(struct vtn_builder *, SpvOp,
 240                                         const uint32_t *, unsigned);
 241
 242 void vtn_build_cfg(struct vtn_builder *b, const uint32_t *words,
 243                    const uint32_t *end);
 244 void vtn_function_emit(struct vtn_builder *b, struct vtn_function *func,
 245                        vtn_instruction_handler instruction_handler);
 246
 247 const uint32_t *
 248 vtn_foreach_instruction(struct vtn_builder *b, const uint32_t *start,
 249                         const uint32_t *end, vtn_instruction_handler handler);
 250
 251 struct vtn_ssa_value {
 252    union {
 253       nir_ssa_def *def;
 254       struct vtn_ssa_value **elems;
 255    };
 256
 257    /* For matrices, if this is non-NULL, then this value is actually the
 258     * transpose of some other value.  The value that `transposed` points to
 259     * always dominates this value.
 260     */
 261    struct vtn_ssa_value *transposed;
 262
 263    const struct glsl_type *type;
 264 };
 265
 266 enum vtn_base_type {
 267    vtn_base_type_void,
 268    vtn_base_type_scalar,
 269    vtn_base_type_vector,
 270    vtn_base_type_matrix,
 271    vtn_base_type_array,
 272    vtn_base_type_struct,
 273    vtn_base_type_pointer,
 274    vtn_base_type_image,
 275    vtn_base_type_sampler,
 276    vtn_base_type_sampled_image,
 277    vtn_base_type_function,
 278 };
 279
 280 struct vtn_type {
 281    enum vtn_base_type base_type;
 282
 283    const struct glsl_type *type;
 284
 285    /* The SPIR-V id of the given type. */
 286    uint32_t id;
 287
 288    /* Specifies the length of complex types.
 289     *
 290     * For Workgroup pointers, this is the size of the referenced type.
 291     */
 292    unsigned length;
 293
 294    /* for arrays, matrices and pointers, the array stride */
 295    unsigned stride;
 296
 297    union {
 298       /* Members for scalar, vector, and array-like types */
 299       struct {
 300          /* for arrays, the vtn_type for the elements of the array */
 301          struct vtn_type *array_element;
 302
 303          /* for matrices, whether the matrix is stored row-major */
 304          bool row_major:1;
 305
 306          /* Whether this type, or a parent type, has been decorated as a
 307           * builtin
 308           */
 309          bool is_builtin:1;
 310
 311          /* Which built-in to use */
 312          SpvBuiltIn builtin;
 313       };
 314
 315       /* Members for struct types */
 316       struct {
 317          /* for structures, the vtn_type for each member */
 318          struct vtn_type **members;
 319
 320          /* for structs, the offset of each member */
 321          unsigned *offsets;
 322
 323          /* for structs, whether it was decorated as a "non-SSBO-like" block */
 324          bool block:1;
 325
 326          /* for structs, whether it was decorated as an "SSBO-like" block */
 327          bool buffer_block:1;
 328
 329          /* for structs with block == true, whether this is a builtin block
 330           * (i.e. a block that contains only builtins).
 331           */
 332          bool builtin_block:1;
 333       };
 334
 335       /* Members for pointer types */
 336       struct {
 337          /* For pointers, the vtn_type for dereferenced type */
 338          struct vtn_type *deref;
 339
 340          /* Storage class for pointers */
 341          SpvStorageClass storage_class;
 342
 343          /* Required alignment for pointers */
 344          uint32_t align;
 345       };
 346
 347       /* Members for image types */
 348       struct {
 349          /* For images, indicates whether it's sampled or storage */
 350          bool sampled;
 351
 352          /* Image format for image_load_store type images */
 353          unsigned image_format;
 354
 355          /* Access qualifier for storage images */
 356          SpvAccessQualifier access_qualifier;
 357       };
 358
 359       /* Members for sampled image types */
 360       struct {
 361          /* For sampled images, the image type */
 362          struct vtn_type *image;
 363       };
 364
 365       /* Members for function types */
 366       struct {
 367          /* For functions, the vtn_type for each parameter */
 368          struct vtn_type **params;
 369
 370          /* Return type for functions */
 371          struct vtn_type *return_type;
 372       };
 373    };
 374 };
 375
 376 bool vtn_types_compatible(struct vtn_builder *b,
 377                           struct vtn_type *t1, struct vtn_type *t2);
 378
 379 struct vtn_variable;
 380
 381 enum vtn_access_mode {
 382    vtn_access_mode_id,
 383    vtn_access_mode_literal,
 384 };
 385
 386 struct vtn_access_link {
 387    enum vtn_access_mode mode;
 388    uint32_t id;
 389 };
 390
 391 struct vtn_access_chain {
 392    uint32_t length;
 393
 394    /** Whether or not to treat the base pointer as an array.  This is only
 395     * true if this access chain came from an OpPtrAccessChain.
 396     */
 397    bool ptr_as_array;
 398
 399    /** Struct elements and array offsets.
 400     *
 401     * This is an array of 1 so that it can conveniently be created on the
 402     * stack but the real length is given by the length field.
 403     */
 404    struct vtn_access_link link[1];
 405 };
 406
 407 enum vtn_variable_mode {
 408    vtn_variable_mode_local,
 409    vtn_variable_mode_global,
 410    vtn_variable_mode_param,
 411    vtn_variable_mode_uniform,
 412    vtn_variable_mode_ubo,
 413    vtn_variable_mode_ssbo,
 414    vtn_variable_mode_push_constant,
 415    vtn_variable_mode_workgroup,
 416    vtn_variable_mode_input,
 417    vtn_variable_mode_output,
 418 };
 419
 420 struct vtn_pointer {
 421    /** The variable mode for the referenced data */
 422    enum vtn_variable_mode mode;
 423
 424    /** The dereferenced type of this pointer */
 425    struct vtn_type *type;
 426
 427    /** The pointer type of this pointer
 428     *
 429     * This may be NULL for some temporary pointers constructed as part of a
 430     * large load, store, or copy.  It MUST be valid for all pointers which are
 431     * stored as SPIR-V SSA values.
 432     */
 433    struct vtn_type *ptr_type;
 434
 435    /** The referenced variable, if known
 436     *
 437     * This field may be NULL if the pointer uses a (block_index, offset) pair
 438     * instead of an access chain or if the access chain starts at a deref.
 439     */
 440    struct vtn_variable *var;
 441
 442    /** The deref at the base of the chain
 443     *
 444     * This field may be NULL if the pointer uses a (block_index, offset) pair
 445     * instead of an access chain or if the access chain starts at a variable.
 446     */
 447    nir_deref_instr *deref;
 448
 449    /** An access chain describing how to get from var to the referenced data
 450     *
 451     * This field may be NULL if the pointer references the entire variable or
 452     * if a (block_index, offset) pair is used instead of an access chain.
 453     */
 454    struct vtn_access_chain *chain;
 455
 456    /** A (block_index, offset) pair representing a UBO or SSBO position. */
 457    struct nir_ssa_def *block_index;
 458    struct nir_ssa_def *offset;
 459 };
 460
 461 struct vtn_variable {
 462    enum vtn_variable_mode mode;
 463
 464    struct vtn_type *type;
 465
 466    unsigned descriptor_set;
 467    unsigned binding;
 468    bool explicit_binding;
 469    unsigned input_attachment_index;
 470    bool patch;
 471
 472    nir_variable *var;
 473
 474    int shared_location;
 475
 476    /**
 477     * In some early released versions of GLSLang, it implemented all function
 478     * calls by making copies of all parameters into temporary variables and
 479     * passing those variables into the function.  It even did so for samplers
 480     * and images which violates the SPIR-V spec.  Unfortunately, two games
 481     * (Talos Principle and Doom) shipped with this old version of GLSLang and
 482     * also happen to pass samplers into functions.  Talos Principle received
 483     * an update fairly shortly after release with an updated GLSLang.  Doom,
 484     * on the other hand, has never received an update so we need to work
 485     * around this GLSLang issue in SPIR-V -> NIR.  Hopefully, we can drop this
 486     * hack at some point in the future.
 487     */
 488    struct vtn_pointer *copy_prop_sampler;
 489 };
 490
 491 struct vtn_image_pointer {
 492    struct vtn_pointer *image;
 493    nir_ssa_def *coord;
 494    nir_ssa_def *sample;
 495 };
 496
 497 struct vtn_sampled_image {
 498    struct vtn_type *type;
 499    struct vtn_pointer *image; /* Image or array of images */
 500    struct vtn_pointer *sampler; /* Sampler */
 501 };
 502
 503 struct vtn_value {
 504    enum vtn_value_type value_type;
 505    const char *name;
 506    struct vtn_decoration *decoration;
 507    struct vtn_type *type;
 508    union {
 509       void *ptr;
 510       char *str;
 511       nir_constant *constant;
 512       struct vtn_pointer *pointer;
 513       struct vtn_image_pointer *image;
 514       struct vtn_sampled_image *sampled_image;
 515       struct vtn_function *func;
 516       struct vtn_block *block;
 517       struct vtn_ssa_value *ssa;
 518       vtn_instruction_handler ext_handler;
 519    };
 520 };
 521
 522 #define VTN_DEC_DECORATION -1
 523 #define VTN_DEC_EXECUTION_MODE -2
 524 #define VTN_DEC_STRUCT_MEMBER0 0
 525
 526 struct vtn_decoration {
 527    struct vtn_decoration *next;
 528
 529    /* Specifies how to apply this decoration.  Negative values represent a
 530     * decoration or execution mode. (See the VTN_DEC_ #defines above.)
 531     * Non-negative values specify that it applies to a structure member.
 532     */
 533    int scope;
 534
 535    const uint32_t *literals;
 536    struct vtn_value *group;
 537
 538    union {
 539       SpvDecoration decoration;
 540       SpvExecutionMode exec_mode;
 541    };
 542 };
 543
 544 struct vtn_builder {
 545    nir_builder nb;
 546
 547    /* Used by vtn_fail to jump back to the beginning of SPIR-V compilation */
 548    jmp_buf fail_jump;
 549
 550    const uint32_t *spirv;
 551    size_t spirv_word_count;
 552
 553    nir_shader *shader;
 554    const struct spirv_to_nir_options *options;
 555    struct vtn_block *block;
 556
 557    /* Current offset, file, line, and column.  Useful for debugging.  Set
 558     * automatically by vtn_foreach_instruction.
 559     */
 560    size_t spirv_offset;
 561    char *file;
 562    int line, col;
 563
 564    /*
 565     * In SPIR-V, constants are global, whereas in NIR, the load_const
 566     * instruction we use is per-function. So while we parse each function, we
 567     * keep a hash table of constants we've resolved to nir_ssa_value's so
 568     * far, and we lazily resolve them when we see them used in a function.
 569     */
 570    struct hash_table *const_table;
 571
 572    /*
 573     * Map from phi instructions (pointer to the start of the instruction)
 574     * to the variable corresponding to it.
 575     */
 576    struct hash_table *phi_table;
 577
 578    unsigned num_specializations;
 579    struct nir_spirv_specialization *specializations;
 580
 581    unsigned value_id_bound;
 582    struct vtn_value *values;
 583
 584    gl_shader_stage entry_point_stage;
 585    const char *entry_point_name;
 586    struct vtn_value *entry_point;
 587    bool origin_upper_left;
 588    bool pixel_center_integer;
 589
 590    struct vtn_function *func;
 591    struct exec_list functions;
 592
 593    /* Current function parameter index */
 594    unsigned func_param_idx;
 595
 596    bool has_loop_continue;
 597 };
 598
 599 nir_ssa_def *
 600 vtn_pointer_to_ssa(struct vtn_builder *b, struct vtn_pointer *ptr);
 601 struct vtn_pointer *
 602 vtn_pointer_from_ssa(struct vtn_builder *b, nir_ssa_def *ssa,
 603                      struct vtn_type *ptr_type);
 604
 605 static inline struct vtn_value *
 606 vtn_untyped_value(struct vtn_builder *b, uint32_t value_id)
 607 {
 608    vtn_fail_if(value_id >= b->value_id_bound,
 609                "SPIR-V id %u is out-of-bounds", value_id);
 610    return &b->values[value_id];
 611 }
 612
 613 static inline struct vtn_value *
 614 vtn_push_value(struct vtn_builder *b, uint32_t value_id,
 615                enum vtn_value_type value_type)
 616 {
 617    struct vtn_value *val = vtn_untyped_value(b, value_id);
 618
 619    vtn_fail_if(val->value_type != vtn_value_type_invalid,
 620                "SPIR-V id %u has already been written by another instruction",
 621                value_id);
 622
 623    val->value_type = value_type;
 624    return &b->values[value_id];
 625 }
 626
 627 static inline struct vtn_value *
 628 vtn_push_ssa(struct vtn_builder *b, uint32_t value_id,
 629              struct vtn_type *type, struct vtn_ssa_value *ssa)
 630 {
 631    struct vtn_value *val;
 632    if (type->base_type == vtn_base_type_pointer) {
 633       val = vtn_push_value(b, value_id, vtn_value_type_pointer);
 634       val->pointer = vtn_pointer_from_ssa(b, ssa->def, type);
 635    } else {
 636       val = vtn_push_value(b, value_id, vtn_value_type_ssa);
 637       val->ssa = ssa;
 638    }
 639    return val;
 640 }
 641
 642 static inline struct vtn_value *
 643 vtn_value(struct vtn_builder *b, uint32_t value_id,
 644           enum vtn_value_type value_type)
 645 {
 646    struct vtn_value *val = vtn_untyped_value(b, value_id);
 647    vtn_fail_if(val->value_type != value_type,
 648                "SPIR-V id %u is the wrong kind of value", value_id);
 649    return val;
 650 }
 651
 652 bool
 653 vtn_set_instruction_result_type(struct vtn_builder *b, SpvOp opcode,
 654                                 const uint32_t *w, unsigned count);
 655
 656 static inline nir_constant *
 657 vtn_constant_value(struct vtn_builder *b, uint32_t value_id)
 658 {
 659    return vtn_value(b, value_id, vtn_value_type_constant)->constant;
 660 }
 661
 662 struct vtn_ssa_value *vtn_ssa_value(struct vtn_builder *b, uint32_t value_id);
 663
 664 struct vtn_ssa_value *vtn_create_ssa_value(struct vtn_builder *b,
 665                                            const struct glsl_type *type);
 666
 667 struct vtn_ssa_value *vtn_ssa_transpose(struct vtn_builder *b,
 668                                         struct vtn_ssa_value *src);
 669
 670 nir_ssa_def *vtn_vector_extract(struct vtn_builder *b, nir_ssa_def *src,
 671                                 unsigned index);
 672 nir_ssa_def *vtn_vector_extract_dynamic(struct vtn_builder *b, nir_ssa_def *src,
 673                                         nir_ssa_def *index);
 674 nir_ssa_def *vtn_vector_insert(struct vtn_builder *b, nir_ssa_def *src,
 675                                nir_ssa_def *insert, unsigned index);
 676 nir_ssa_def *vtn_vector_insert_dynamic(struct vtn_builder *b, nir_ssa_def *src,
 677                                        nir_ssa_def *insert, nir_ssa_def *index);
 678
 679 nir_deref_instr *vtn_nir_deref(struct vtn_builder *b, uint32_t id);
 680
 681 struct vtn_pointer *vtn_pointer_for_variable(struct vtn_builder *b,
 682                                              struct vtn_variable *var,
 683                                              struct vtn_type *ptr_type);
 684
 685 nir_deref_var *vtn_pointer_to_deref_var(struct vtn_builder *b,
 686                                         struct vtn_pointer *ptr);
 687 nir_deref_instr *vtn_pointer_to_deref(struct vtn_builder *b,
 688                                       struct vtn_pointer *ptr);
 689 nir_ssa_def *
 690 vtn_pointer_to_offset(struct vtn_builder *b, struct vtn_pointer *ptr,
 691                       nir_ssa_def **index_out);
 692
 693 struct vtn_ssa_value *
 694 vtn_local_load(struct vtn_builder *b, nir_deref_instr *src);
 695
 696 void vtn_local_store(struct vtn_builder *b, struct vtn_ssa_value *src,
 697                      nir_deref_instr *dest);
 698
 699 struct vtn_ssa_value *
 700 vtn_variable_load(struct vtn_builder *b, struct vtn_pointer *src);
 701
 702 void vtn_variable_store(struct vtn_builder *b, struct vtn_ssa_value *src,
 703                         struct vtn_pointer *dest);
 704
 705 void vtn_handle_variables(struct vtn_builder *b, SpvOp opcode,
 706                           const uint32_t *w, unsigned count);
 707
 708
 709 typedef void (*vtn_decoration_foreach_cb)(struct vtn_builder *,
 710                                           struct vtn_value *,
 711                                           int member,
 712                                           const struct vtn_decoration *,
 713                                           void *);
 714
 715 void vtn_foreach_decoration(struct vtn_builder *b, struct vtn_value *value,
 716                             vtn_decoration_foreach_cb cb, void *data);
 717
 718 typedef void (*vtn_execution_mode_foreach_cb)(struct vtn_builder *,
 719                                               struct vtn_value *,
 720                                               const struct vtn_decoration *,
 721                                               void *);
 722
 723 void vtn_foreach_execution_mode(struct vtn_builder *b, struct vtn_value *value,
 724                                 vtn_execution_mode_foreach_cb cb, void *data);
 725
 726 nir_op vtn_nir_alu_op_for_spirv_opcode(struct vtn_builder *b,
 727                                        SpvOp opcode, bool *swap,
 728                                        unsigned src_bit_size, unsigned dst_bit_size);
 729
 730 void vtn_handle_alu(struct vtn_builder *b, SpvOp opcode,
 731                     const uint32_t *w, unsigned count);
 732
 733 void vtn_handle_subgroup(struct vtn_builder *b, SpvOp opcode,
 734                          const uint32_t *w, unsigned count);
 735
 736 bool vtn_handle_glsl450_instruction(struct vtn_builder *b, SpvOp ext_opcode,
 737                                     const uint32_t *words, unsigned count);
 738
 739 struct vtn_builder* vtn_create_builder(const uint32_t *words, size_t word_count,
 740                                        gl_shader_stage stage, const char *entry_point_name,
 741                                        const struct spirv_to_nir_options *options);
 742
 743 void vtn_handle_entry_point(struct vtn_builder *b, const uint32_t *w,
 744                             unsigned count);
 745
 746 void vtn_handle_decoration(struct vtn_builder *b, SpvOp opcode,
 747                            const uint32_t *w, unsigned count);
 748
 749 static inline uint32_t
 750 vtn_align_u32(uint32_t v, uint32_t a)
 751 {
 752    assert(a != 0 && a == (a & -((int32_t) a)));
 753    return (v + a - 1) & ~(a - 1);
 754 }
 755
 756 static inline uint64_t
 757 vtn_u64_literal(const uint32_t *w)
 758 {
 759    return (uint64_t)w[1] << 32 | w[0];
 760 }
 761
 762 bool vtn_handle_amd_gcn_shader_instruction(struct vtn_builder *b, SpvOp ext_opcode,
 763                                            const uint32_t *words, unsigned count);
 764
 765 bool vtn_handle_amd_shader_trinary_minmax_instruction(struct vtn_builder *b, SpvOp ext_opcode,
 766                                                       const uint32_t *words, unsigned count);
 767 #endif /* _VTN_PRIVATE_H_ */