Skip to content
Snippets Groups Projects
d3dbc.c 37.8 KiB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956
/*
 * Copyright 2002-2003 Jason Edmeades
 * Copyright 2002-2003 Raphael Junqueira
 * Copyright 2004 Christian Costa
 * Copyright 2005 Oliver Stieber
 * Copyright 2006 Ivan Gyurdiev
 * Copyright 2007-2008 Stefan Dösinger for CodeWeavers
 * Copyright 2009, 2021 Henri Verbeet for CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "vkd3d_shader_private.h"

#define VKD3D_SM1_VS  0xfffeu
#define VKD3D_SM1_PS  0xffffu

#define VKD3D_SM1_DCL_USAGE_SHIFT              0u
#define VKD3D_SM1_DCL_USAGE_MASK               (0xfu << VKD3D_SM1_DCL_USAGE_SHIFT)
#define VKD3D_SM1_DCL_USAGE_INDEX_SHIFT        16u
#define VKD3D_SM1_DCL_USAGE_INDEX_MASK         (0xfu << VKD3D_SM1_DCL_USAGE_INDEX_SHIFT)

#define VKD3D_SM1_RESOURCE_TYPE_SHIFT          27u
#define VKD3D_SM1_RESOURCE_TYPE_MASK           (0xfu << VKD3D_SM1_RESOURCE_TYPE_SHIFT)

#define VKD3D_SM1_OPCODE_MASK                  0x0000ffffu

#define VKD3D_SM1_INSTRUCTION_FLAGS_SHIFT      16u
#define VKD3D_SM1_INSTRUCTION_FLAGS_MASK       (0xffu << VKD3D_SM1_INSTRUCTION_FLAGS_SHIFT)

#define VKD3D_SM1_INSTRUCTION_LENGTH_SHIFT     24u
#define VKD3D_SM1_INSTRUCTION_LENGTH_MASK      (0xfu << VKD3D_SM1_INSTRUCTION_LENGTH_SHIFT)

#define VKD3D_SM1_COISSUE                      (0x1u << 30u)

#define VKD3D_SM1_COMMENT_SIZE_SHIFT           16u
#define VKD3D_SM1_COMMENT_SIZE_MASK            (0x7fffu << VKD3D_SM1_COMMENT_SIZE_SHIFT)

#define VKD3D_SM1_INSTRUCTION_PREDICATED       (0x1u << 28u)

#define VKD3D_SM1_INSTRUCTION_PARAMETER        (0x1u << 31u)

#define VKD3D_SM1_REGISTER_NUMBER_MASK         0x000007ffu

#define VKD3D_SM1_REGISTER_TYPE_SHIFT          28u
#define VKD3D_SM1_REGISTER_TYPE_MASK           (0x7u << VKD3D_SM1_REGISTER_TYPE_SHIFT)
#define VKD3D_SM1_REGISTER_TYPE_SHIFT2         8u
#define VKD3D_SM1_REGISTER_TYPE_MASK2          (0x18u << VKD3D_SM1_REGISTER_TYPE_SHIFT2)

#define VKD3D_SM1_ADDRESS_MODE_SHIFT           13u
#define VKD3D_SM1_ADDRESS_MODE_MASK            (0x1u << VKD3D_SM1_ADDRESS_MODE_SHIFT)

#define VKD3D_SM1_DST_MODIFIER_SHIFT           20u
#define VKD3D_SM1_DST_MODIFIER_MASK            (0xfu << VKD3D_SM1_DST_MODIFIER_SHIFT)

#define VKD3D_SM1_DSTSHIFT_SHIFT               24u
#define VKD3D_SM1_DSTSHIFT_MASK                (0xfu << VKD3D_SM1_DSTSHIFT_SHIFT)

#define VKD3D_SM1_WRITEMASK_SHIFT              16u
#define VKD3D_SM1_WRITEMASK_MASK               (0xfu << VKD3D_SM1_WRITEMASK_SHIFT)

#define VKD3D_SM1_SWIZZLE_SHIFT                16u
#define VKD3D_SM1_SWIZZLE_MASK                 (0xffu << VKD3D_SM1_SWIZZLE_SHIFT)
#define VKD3D_SM1_SWIZZLE_DEFAULT              (0u | (1u << 2) | (2u << 4) | (3u << 6))

#define VKD3D_SM1_SWIZZLE_COMPONENT_SHIFT(idx) (2u * (idx))
#define VKD3D_SM1_SWIZZLE_COMPONENT_MASK(idx)  (0x3u << VKD3D_SM1_SWIZZLE_COMPONENT_SHIFT(idx))

#define VKD3D_SM1_SRC_MODIFIER_SHIFT           24u
#define VKD3D_SM1_SRC_MODIFIER_MASK            (0xfu << VKD3D_SM1_SRC_MODIFIER_SHIFT)

#define VKD3D_SM1_END                          0x0000ffffu

#define VKD3D_SM1_VERSION_MAJOR(version)       (((version) >> 8u) & 0xffu)
#define VKD3D_SM1_VERSION_MINOR(version)       (((version) >> 0u) & 0xffu)

enum vkd3d_sm1_address_mode_type
{
    VKD3D_SM1_ADDRESS_MODE_ABSOLUTE = 0x0,
    VKD3D_SM1_ADDRESS_MODE_RELATIVE = 0x1,
};

enum vkd3d_sm1_resource_type
{
    VKD3D_SM1_RESOURCE_UNKNOWN      = 0x0,
    VKD3D_SM1_RESOURCE_TEXTURE_1D   = 0x1,
    VKD3D_SM1_RESOURCE_TEXTURE_2D   = 0x2,
    VKD3D_SM1_RESOURCE_TEXTURE_CUBE = 0x3,
    VKD3D_SM1_RESOURCE_TEXTURE_3D   = 0x4,
};

enum vkd3d_sm1_opcode
{
    VKD3D_SM1_OP_NOP          = 0x00,
    VKD3D_SM1_OP_MOV          = 0x01,
    VKD3D_SM1_OP_ADD          = 0x02,
    VKD3D_SM1_OP_SUB          = 0x03,
    VKD3D_SM1_OP_MAD          = 0x04,
    VKD3D_SM1_OP_MUL          = 0x05,
    VKD3D_SM1_OP_RCP          = 0x06,
    VKD3D_SM1_OP_RSQ          = 0x07,
    VKD3D_SM1_OP_DP3          = 0x08,
    VKD3D_SM1_OP_DP4          = 0x09,
    VKD3D_SM1_OP_MIN          = 0x0a,
    VKD3D_SM1_OP_MAX          = 0x0b,
    VKD3D_SM1_OP_SLT          = 0x0c,
    VKD3D_SM1_OP_SGE          = 0x0d,
    VKD3D_SM1_OP_EXP          = 0x0e,
    VKD3D_SM1_OP_LOG          = 0x0f,
    VKD3D_SM1_OP_LIT          = 0x10,
    VKD3D_SM1_OP_DST          = 0x11,
    VKD3D_SM1_OP_LRP          = 0x12,
    VKD3D_SM1_OP_FRC          = 0x13,
    VKD3D_SM1_OP_M4x4         = 0x14,
    VKD3D_SM1_OP_M4x3         = 0x15,
    VKD3D_SM1_OP_M3x4         = 0x16,
    VKD3D_SM1_OP_M3x3         = 0x17,
    VKD3D_SM1_OP_M3x2         = 0x18,
    VKD3D_SM1_OP_CALL         = 0x19,
    VKD3D_SM1_OP_CALLNZ       = 0x1a,
    VKD3D_SM1_OP_LOOP         = 0x1b,
    VKD3D_SM1_OP_RET          = 0x1c,
    VKD3D_SM1_OP_ENDLOOP      = 0x1d,
    VKD3D_SM1_OP_LABEL        = 0x1e,
    VKD3D_SM1_OP_DCL          = 0x1f,
    VKD3D_SM1_OP_POW          = 0x20,
    VKD3D_SM1_OP_CRS          = 0x21,
    VKD3D_SM1_OP_SGN          = 0x22,
    VKD3D_SM1_OP_ABS          = 0x23,
    VKD3D_SM1_OP_NRM          = 0x24,
    VKD3D_SM1_OP_SINCOS       = 0x25,
    VKD3D_SM1_OP_REP          = 0x26,
    VKD3D_SM1_OP_ENDREP       = 0x27,
    VKD3D_SM1_OP_IF           = 0x28,
    VKD3D_SM1_OP_IFC          = 0x29,
    VKD3D_SM1_OP_ELSE         = 0x2a,
    VKD3D_SM1_OP_ENDIF        = 0x2b,
    VKD3D_SM1_OP_BREAK        = 0x2c,
    VKD3D_SM1_OP_BREAKC       = 0x2d,
    VKD3D_SM1_OP_MOVA         = 0x2e,
    VKD3D_SM1_OP_DEFB         = 0x2f,
    VKD3D_SM1_OP_DEFI         = 0x30,

    VKD3D_SM1_OP_TEXCOORD     = 0x40,
    VKD3D_SM1_OP_TEXKILL      = 0x41,
    VKD3D_SM1_OP_TEX          = 0x42,
    VKD3D_SM1_OP_TEXBEM       = 0x43,
    VKD3D_SM1_OP_TEXBEML      = 0x44,
    VKD3D_SM1_OP_TEXREG2AR    = 0x45,
    VKD3D_SM1_OP_TEXREG2GB    = 0x46,
    VKD3D_SM1_OP_TEXM3x2PAD   = 0x47,
    VKD3D_SM1_OP_TEXM3x2TEX   = 0x48,
    VKD3D_SM1_OP_TEXM3x3PAD   = 0x49,
    VKD3D_SM1_OP_TEXM3x3TEX   = 0x4a,
    VKD3D_SM1_OP_TEXM3x3DIFF  = 0x4b,
    VKD3D_SM1_OP_TEXM3x3SPEC  = 0x4c,
    VKD3D_SM1_OP_TEXM3x3VSPEC = 0x4d,
    VKD3D_SM1_OP_EXPP         = 0x4e,
    VKD3D_SM1_OP_LOGP         = 0x4f,
    VKD3D_SM1_OP_CND          = 0x50,
    VKD3D_SM1_OP_DEF          = 0x51,
    VKD3D_SM1_OP_TEXREG2RGB   = 0x52,
    VKD3D_SM1_OP_TEXDP3TEX    = 0x53,
    VKD3D_SM1_OP_TEXM3x2DEPTH = 0x54,
    VKD3D_SM1_OP_TEXDP3       = 0x55,
    VKD3D_SM1_OP_TEXM3x3      = 0x56,
    VKD3D_SM1_OP_TEXDEPTH     = 0x57,
    VKD3D_SM1_OP_CMP          = 0x58,
    VKD3D_SM1_OP_BEM          = 0x59,
    VKD3D_SM1_OP_DP2ADD       = 0x5a,
    VKD3D_SM1_OP_DSX          = 0x5b,
    VKD3D_SM1_OP_DSY          = 0x5c,
    VKD3D_SM1_OP_TEXLDD       = 0x5d,
    VKD3D_SM1_OP_SETP         = 0x5e,
    VKD3D_SM1_OP_TEXLDL       = 0x5f,
    VKD3D_SM1_OP_BREAKP       = 0x60,

    VKD3D_SM1_OP_PHASE        = 0xfffd,
    VKD3D_SM1_OP_COMMENT      = 0xfffe,
    VKD3D_SM1_OP_END          = 0Xffff,
};

struct vkd3d_sm1_opcode_info
{
    enum vkd3d_sm1_opcode sm1_opcode;
    unsigned int dst_count;
    unsigned int src_count;
    enum vkd3d_shader_opcode vkd3d_opcode;
    struct
    {
        unsigned int major, minor;
    } min_version, max_version;
};

struct vkd3d_shader_sm1_parser
{
    const struct vkd3d_sm1_opcode_info *opcode_table;
    const uint32_t *start, *end;
    bool abort;

    struct vkd3d_shader_src_param src_rel_addr[4];
    struct vkd3d_shader_src_param pred_rel_addr;
    struct vkd3d_shader_src_param dst_rel_addr;
    struct vkd3d_shader_src_param src_param[4];
    struct vkd3d_shader_src_param pred_param;
    struct vkd3d_shader_dst_param dst_param;

    struct vkd3d_shader_parser p;
};

/* This table is not order or position dependent. */
static const struct vkd3d_sm1_opcode_info vs_opcode_table[] =
{
    /* Arithmetic */
    {VKD3D_SM1_OP_NOP,          0, 0, VKD3DSIH_NOP},
    {VKD3D_SM1_OP_MOV,          1, 1, VKD3DSIH_MOV},
    {VKD3D_SM1_OP_MOVA,         1, 1, VKD3DSIH_MOVA,         {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_ADD,          1, 2, VKD3DSIH_ADD},
    {VKD3D_SM1_OP_SUB,          1, 2, VKD3DSIH_SUB},
    {VKD3D_SM1_OP_MAD,          1, 3, VKD3DSIH_MAD},
    {VKD3D_SM1_OP_MUL,          1, 2, VKD3DSIH_MUL},
    {VKD3D_SM1_OP_RCP,          1, 1, VKD3DSIH_RCP},
    {VKD3D_SM1_OP_RSQ,          1, 1, VKD3DSIH_RSQ},
    {VKD3D_SM1_OP_DP3,          1, 2, VKD3DSIH_DP3},
    {VKD3D_SM1_OP_DP4,          1, 2, VKD3DSIH_DP4},
    {VKD3D_SM1_OP_MIN,          1, 2, VKD3DSIH_MIN},
    {VKD3D_SM1_OP_MAX,          1, 2, VKD3DSIH_MAX},
    {VKD3D_SM1_OP_SLT,          1, 2, VKD3DSIH_SLT},
    {VKD3D_SM1_OP_SGE,          1, 2, VKD3DSIH_SGE},
    {VKD3D_SM1_OP_ABS,          1, 1, VKD3DSIH_ABS},
    {VKD3D_SM1_OP_EXP,          1, 1, VKD3DSIH_EXP},
    {VKD3D_SM1_OP_LOG,          1, 1, VKD3DSIH_LOG},
    {VKD3D_SM1_OP_EXPP,         1, 1, VKD3DSIH_EXPP},
    {VKD3D_SM1_OP_LOGP,         1, 1, VKD3DSIH_LOGP},
    {VKD3D_SM1_OP_LIT,          1, 1, VKD3DSIH_LIT},
    {VKD3D_SM1_OP_DST,          1, 2, VKD3DSIH_DST},
    {VKD3D_SM1_OP_LRP,          1, 3, VKD3DSIH_LRP},
    {VKD3D_SM1_OP_FRC,          1, 1, VKD3DSIH_FRC},
    {VKD3D_SM1_OP_POW,          1, 2, VKD3DSIH_POW},
    {VKD3D_SM1_OP_CRS,          1, 2, VKD3DSIH_CRS},
    {VKD3D_SM1_OP_SGN,          1, 3, VKD3DSIH_SGN,          {2, 0}, {  2,   1}},
    {VKD3D_SM1_OP_SGN,          1, 1, VKD3DSIH_SGN,          {3, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_NRM,          1, 1, VKD3DSIH_NRM,},
    {VKD3D_SM1_OP_SINCOS,       1, 3, VKD3DSIH_SINCOS,       {2, 0}, {  2,   1}},
    {VKD3D_SM1_OP_SINCOS,       1, 1, VKD3DSIH_SINCOS,       {3, 0}, {~0u, ~0u}},
    /* Matrix */
    {VKD3D_SM1_OP_M4x4,         1, 2, VKD3DSIH_M4x4},
    {VKD3D_SM1_OP_M4x3,         1, 2, VKD3DSIH_M4x3},
    {VKD3D_SM1_OP_M3x4,         1, 2, VKD3DSIH_M3x4},
    {VKD3D_SM1_OP_M3x3,         1, 2, VKD3DSIH_M3x3},
    {VKD3D_SM1_OP_M3x2,         1, 2, VKD3DSIH_M3x2},
    /* Declarations */
    {VKD3D_SM1_OP_DCL,          0, 2, VKD3DSIH_DCL},
    /* Constant definitions */
    {VKD3D_SM1_OP_DEF,          1, 4, VKD3DSIH_DEF},
    {VKD3D_SM1_OP_DEFB,         1, 1, VKD3DSIH_DEFB},
    {VKD3D_SM1_OP_DEFI,         1, 4, VKD3DSIH_DEFI},
    /* Control flow */
    {VKD3D_SM1_OP_REP,          0, 1, VKD3DSIH_REP,          {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_ENDREP,       0, 0, VKD3DSIH_ENDREP,       {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_IF,           0, 1, VKD3DSIH_IF,           {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_IFC,          0, 2, VKD3DSIH_IFC,          {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_ELSE,         0, 0, VKD3DSIH_ELSE,         {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_ENDIF,        0, 0, VKD3DSIH_ENDIF,        {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_BREAK,        0, 0, VKD3DSIH_BREAK,        {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_BREAKC,       0, 2, VKD3DSIH_BREAKC,       {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_BREAKP,       0, 1, VKD3DSIH_BREAKP},
    {VKD3D_SM1_OP_CALL,         0, 1, VKD3DSIH_CALL,         {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_CALLNZ,       0, 2, VKD3DSIH_CALLNZ,       {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_LOOP,         0, 2, VKD3DSIH_LOOP,         {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_RET,          0, 0, VKD3DSIH_RET,          {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_ENDLOOP,      0, 0, VKD3DSIH_ENDLOOP,      {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_LABEL,        0, 1, VKD3DSIH_LABEL,        {2, 0}, {~0u, ~0u}},

    {VKD3D_SM1_OP_SETP,         1, 2, VKD3DSIH_SETP},
    {VKD3D_SM1_OP_TEXLDL,       1, 2, VKD3DSIH_TEXLDL,       {3, 0}, {~0u, ~0u}},
    {0,                         0, 0, VKD3DSIH_INVALID},
};

static const struct vkd3d_sm1_opcode_info ps_opcode_table[] =
{
    /* Arithmetic */
    {VKD3D_SM1_OP_NOP,          0, 0, VKD3DSIH_NOP},
    {VKD3D_SM1_OP_MOV,          1, 1, VKD3DSIH_MOV},
    {VKD3D_SM1_OP_ADD,          1, 2, VKD3DSIH_ADD},
    {VKD3D_SM1_OP_SUB,          1, 2, VKD3DSIH_SUB},
    {VKD3D_SM1_OP_MAD,          1, 3, VKD3DSIH_MAD},
    {VKD3D_SM1_OP_MUL,          1, 2, VKD3DSIH_MUL},
    {VKD3D_SM1_OP_RCP,          1, 1, VKD3DSIH_RCP},
    {VKD3D_SM1_OP_RSQ,          1, 1, VKD3DSIH_RSQ},
    {VKD3D_SM1_OP_DP3,          1, 2, VKD3DSIH_DP3},
    {VKD3D_SM1_OP_DP4,          1, 2, VKD3DSIH_DP4},
    {VKD3D_SM1_OP_MIN,          1, 2, VKD3DSIH_MIN},
    {VKD3D_SM1_OP_MAX,          1, 2, VKD3DSIH_MAX},
    {VKD3D_SM1_OP_SLT,          1, 2, VKD3DSIH_SLT},
    {VKD3D_SM1_OP_SGE,          1, 2, VKD3DSIH_SGE},
    {VKD3D_SM1_OP_ABS,          1, 1, VKD3DSIH_ABS},
    {VKD3D_SM1_OP_EXP,          1, 1, VKD3DSIH_EXP},
    {VKD3D_SM1_OP_LOG,          1, 1, VKD3DSIH_LOG},
    {VKD3D_SM1_OP_EXPP,         1, 1, VKD3DSIH_EXPP},
    {VKD3D_SM1_OP_LOGP,         1, 1, VKD3DSIH_LOGP},
    {VKD3D_SM1_OP_DST,          1, 2, VKD3DSIH_DST},
    {VKD3D_SM1_OP_LRP,          1, 3, VKD3DSIH_LRP},
    {VKD3D_SM1_OP_FRC,          1, 1, VKD3DSIH_FRC},
    {VKD3D_SM1_OP_CND,          1, 3, VKD3DSIH_CND,          {1, 0}, {  1,   4}},
    {VKD3D_SM1_OP_CMP,          1, 3, VKD3DSIH_CMP,          {1, 2}, {  3,   0}},
    {VKD3D_SM1_OP_POW,          1, 2, VKD3DSIH_POW},
    {VKD3D_SM1_OP_CRS,          1, 2, VKD3DSIH_CRS},
    {VKD3D_SM1_OP_NRM,          1, 1, VKD3DSIH_NRM},
    {VKD3D_SM1_OP_SINCOS,       1, 3, VKD3DSIH_SINCOS,       {2, 0}, {  2,   1}},
    {VKD3D_SM1_OP_SINCOS,       1, 1, VKD3DSIH_SINCOS,       {3, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_DP2ADD,       1, 3, VKD3DSIH_DP2ADD,       {2, 0}, {~0u, ~0u}},
    /* Matrix */
    {VKD3D_SM1_OP_M4x4,         1, 2, VKD3DSIH_M4x4},
    {VKD3D_SM1_OP_M4x3,         1, 2, VKD3DSIH_M4x3},
    {VKD3D_SM1_OP_M3x4,         1, 2, VKD3DSIH_M3x4},
    {VKD3D_SM1_OP_M3x3,         1, 2, VKD3DSIH_M3x3},
    {VKD3D_SM1_OP_M3x2,         1, 2, VKD3DSIH_M3x2},
    /* Declarations */
    {VKD3D_SM1_OP_DCL,          0, 2, VKD3DSIH_DCL},
    /* Constant definitions */
    {VKD3D_SM1_OP_DEF,          1, 4, VKD3DSIH_DEF},
    {VKD3D_SM1_OP_DEFB,         1, 1, VKD3DSIH_DEFB},
    {VKD3D_SM1_OP_DEFI,         1, 4, VKD3DSIH_DEFI},
    /* Control flow */
    {VKD3D_SM1_OP_REP,          0, 1, VKD3DSIH_REP,          {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_ENDREP,       0, 0, VKD3DSIH_ENDREP,       {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_IF,           0, 1, VKD3DSIH_IF,           {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_IFC,          0, 2, VKD3DSIH_IFC,          {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_ELSE,         0, 0, VKD3DSIH_ELSE,         {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_ENDIF,        0, 0, VKD3DSIH_ENDIF,        {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_BREAK,        0, 0, VKD3DSIH_BREAK,        {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_BREAKC,       0, 2, VKD3DSIH_BREAKC,       {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_BREAKP,       0, 1, VKD3DSIH_BREAKP},
    {VKD3D_SM1_OP_CALL,         0, 1, VKD3DSIH_CALL,         {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_CALLNZ,       0, 2, VKD3DSIH_CALLNZ,       {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_LOOP,         0, 2, VKD3DSIH_LOOP,         {3, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_RET,          0, 0, VKD3DSIH_RET,          {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_ENDLOOP,      0, 0, VKD3DSIH_ENDLOOP,      {3, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_LABEL,        0, 1, VKD3DSIH_LABEL,        {2, 1}, {~0u, ~0u}},
    /* Texture */
    {VKD3D_SM1_OP_TEXCOORD,     1, 0, VKD3DSIH_TEXCOORD,     {0, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXCOORD,     1, 1, VKD3DSIH_TEXCOORD,     {1 ,4}, {  1,   4}},
    {VKD3D_SM1_OP_TEXKILL,      1, 0, VKD3DSIH_TEXKILL,      {1 ,0}, {  3,   0}},
    {VKD3D_SM1_OP_TEX,          1, 0, VKD3DSIH_TEX,          {0, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEX,          1, 1, VKD3DSIH_TEX,          {1, 4}, {  1,   4}},
    {VKD3D_SM1_OP_TEX,          1, 2, VKD3DSIH_TEX,          {2, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_TEXBEM,       1, 1, VKD3DSIH_TEXBEM,       {0, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXBEML,      1, 1, VKD3DSIH_TEXBEML,      {1, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXREG2AR,    1, 1, VKD3DSIH_TEXREG2AR,    {1, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXREG2GB,    1, 1, VKD3DSIH_TEXREG2GB,    {1, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXREG2RGB,   1, 1, VKD3DSIH_TEXREG2RGB,   {1, 2}, {  1,   3}},
    {VKD3D_SM1_OP_TEXM3x2PAD,   1, 1, VKD3DSIH_TEXM3x2PAD,   {1, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXM3x2TEX,   1, 1, VKD3DSIH_TEXM3x2TEX,   {1, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXM3x3PAD,   1, 1, VKD3DSIH_TEXM3x3PAD,   {1, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXM3x3DIFF,  1, 1, VKD3DSIH_TEXM3x3DIFF,  {0, 0}, {  0,   0}},
    {VKD3D_SM1_OP_TEXM3x3SPEC,  1, 2, VKD3DSIH_TEXM3x3SPEC,  {1, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXM3x3VSPEC, 1, 1, VKD3DSIH_TEXM3x3VSPEC, {1, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXM3x3TEX,   1, 1, VKD3DSIH_TEXM3x3TEX,   {1, 0}, {  1,   3}},
    {VKD3D_SM1_OP_TEXDP3TEX,    1, 1, VKD3DSIH_TEXDP3TEX,    {1, 2}, {  1,   3}},
    {VKD3D_SM1_OP_TEXM3x2DEPTH, 1, 1, VKD3DSIH_TEXM3x2DEPTH, {1, 3}, {  1,   3}},
    {VKD3D_SM1_OP_TEXDP3,       1, 1, VKD3DSIH_TEXDP3,       {1, 2}, {  1,   3}},
    {VKD3D_SM1_OP_TEXM3x3,      1, 1, VKD3DSIH_TEXM3x3,      {1, 2}, {  1,   3}},
    {VKD3D_SM1_OP_TEXDEPTH,     1, 0, VKD3DSIH_TEXDEPTH,     {1, 4}, {  1,   4}},
    {VKD3D_SM1_OP_BEM,          1, 2, VKD3DSIH_BEM,          {1, 4}, {  1,   4}},
    {VKD3D_SM1_OP_DSX,          1, 1, VKD3DSIH_DSX,          {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_DSY,          1, 1, VKD3DSIH_DSY,          {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_TEXLDD,       1, 4, VKD3DSIH_TEXLDD,       {2, 1}, {~0u, ~0u}},
    {VKD3D_SM1_OP_SETP,         1, 2, VKD3DSIH_SETP},
    {VKD3D_SM1_OP_TEXLDL,       1, 2, VKD3DSIH_TEXLDL,       {3, 0}, {~0u, ~0u}},
    {VKD3D_SM1_OP_PHASE,        0, 0, VKD3DSIH_PHASE},
    {0,                         0, 0, VKD3DSIH_INVALID},
};

static const enum vkd3d_shader_resource_type resource_type_table[] =
{
    /* VKD3D_SM1_RESOURCE_UNKNOWN */      VKD3D_SHADER_RESOURCE_NONE,
    /* VKD3D_SM1_RESOURCE_TEXTURE_1D */   VKD3D_SHADER_RESOURCE_TEXTURE_1D,
    /* VKD3D_SM1_RESOURCE_TEXTURE_2D */   VKD3D_SHADER_RESOURCE_TEXTURE_2D,
    /* VKD3D_SM1_RESOURCE_TEXTURE_CUBE */ VKD3D_SHADER_RESOURCE_TEXTURE_CUBE,
    /* VKD3D_SM1_RESOURCE_TEXTURE_3D */   VKD3D_SHADER_RESOURCE_TEXTURE_3D,
};

static struct vkd3d_shader_sm1_parser *vkd3d_shader_sm1_parser(struct vkd3d_shader_parser *parser)
{
    return CONTAINING_RECORD(parser, struct vkd3d_shader_sm1_parser, p);
}

static uint32_t read_u32(const uint32_t **ptr)
{
    return *(*ptr)++;
}

static bool shader_ver_ge(const struct vkd3d_shader_version *v, unsigned int major, unsigned int minor)
{
    return v->major > major || (v->major == major && v->minor >= minor);
}

static bool shader_ver_le(const struct vkd3d_shader_version *v, unsigned int major, unsigned int minor)
{
    return v->major < major || (v->major == major && v->minor <= minor);
}

static bool has_relative_address(uint32_t param)
{
    enum vkd3d_sm1_address_mode_type address_mode;

    address_mode = (param & VKD3D_SM1_ADDRESS_MODE_MASK) >> VKD3D_SM1_ADDRESS_MODE_SHIFT;

    return address_mode == VKD3D_SM1_ADDRESS_MODE_RELATIVE;
}

static const struct vkd3d_sm1_opcode_info *shader_sm1_get_opcode_info(
        const struct vkd3d_shader_sm1_parser *sm1, enum vkd3d_sm1_opcode opcode)
{
    const struct vkd3d_sm1_opcode_info *info;
    unsigned int i = 0;

    for (;;)
    {
        info = &sm1->opcode_table[i++];
        if (info->vkd3d_opcode == VKD3DSIH_INVALID)
            return NULL;

        if (opcode == info->sm1_opcode
                && shader_ver_ge(&sm1->p.shader_version, info->min_version.major, info->min_version.minor)
                && (shader_ver_le(&sm1->p.shader_version, info->max_version.major, info->max_version.minor)
                        || !info->max_version.major))
            return info;
    }
}

static unsigned int shader_sm1_get_swizzle_component(uint32_t swizzle, unsigned int idx)
{
    return (swizzle & VKD3D_SM1_SWIZZLE_COMPONENT_MASK(idx)) >> VKD3D_SM1_SWIZZLE_COMPONENT_SHIFT(idx);
}

static uint32_t swizzle_from_sm1(uint32_t swizzle)
{
    return vkd3d_shader_create_swizzle(shader_sm1_get_swizzle_component(swizzle, 0),
            shader_sm1_get_swizzle_component(swizzle, 1),
            shader_sm1_get_swizzle_component(swizzle, 2),
            shader_sm1_get_swizzle_component(swizzle, 3));
}

static void shader_sm1_parse_src_param(uint32_t param, const struct vkd3d_shader_src_param *rel_addr,
        struct vkd3d_shader_src_param *src)
{
    src->reg.type = ((param & VKD3D_SM1_REGISTER_TYPE_MASK) >> VKD3D_SM1_REGISTER_TYPE_SHIFT)
            | ((param & VKD3D_SM1_REGISTER_TYPE_MASK2) >> VKD3D_SM1_REGISTER_TYPE_SHIFT2);
    src->reg.precision = VKD3D_SHADER_REGISTER_PRECISION_DEFAULT;
    src->reg.non_uniform = false;
    src->reg.data_type = VKD3D_DATA_FLOAT;
    src->reg.idx[0].offset = param & VKD3D_SM1_REGISTER_NUMBER_MASK;
    src->reg.idx[0].rel_addr = rel_addr;
    src->reg.idx[1].offset = ~0u;
    src->reg.idx[1].rel_addr = NULL;
    src->reg.idx[2].offset = ~0u;
    src->reg.idx[2].rel_addr = NULL;
    src->swizzle = swizzle_from_sm1((param & VKD3D_SM1_SWIZZLE_MASK) >> VKD3D_SM1_SWIZZLE_SHIFT);
    src->modifiers = (param & VKD3D_SM1_SRC_MODIFIER_MASK) >> VKD3D_SM1_SRC_MODIFIER_SHIFT;
}

static void shader_sm1_parse_dst_param(uint32_t param, const struct vkd3d_shader_src_param *rel_addr,
        struct vkd3d_shader_dst_param *dst)
{
    dst->reg.type = ((param & VKD3D_SM1_REGISTER_TYPE_MASK) >> VKD3D_SM1_REGISTER_TYPE_SHIFT)
            | ((param & VKD3D_SM1_REGISTER_TYPE_MASK2) >> VKD3D_SM1_REGISTER_TYPE_SHIFT2);
    dst->reg.precision = VKD3D_SHADER_REGISTER_PRECISION_DEFAULT;
    dst->reg.non_uniform = false;
    dst->reg.data_type = VKD3D_DATA_FLOAT;
    dst->reg.idx[0].offset = param & VKD3D_SM1_REGISTER_NUMBER_MASK;
    dst->reg.idx[0].rel_addr = rel_addr;
    dst->reg.idx[1].offset = ~0u;
    dst->reg.idx[1].rel_addr = NULL;
    dst->reg.idx[2].offset = ~0u;
    dst->reg.idx[2].rel_addr = NULL;
    dst->write_mask = (param & VKD3D_SM1_WRITEMASK_MASK) >> VKD3D_SM1_WRITEMASK_SHIFT;
    dst->modifiers = (param & VKD3D_SM1_DST_MODIFIER_MASK) >> VKD3D_SM1_DST_MODIFIER_SHIFT;
    dst->shift = (param & VKD3D_SM1_DSTSHIFT_MASK) >> VKD3D_SM1_DSTSHIFT_SHIFT;
}

/* Read a parameter token from the input stream, and possibly a relative
 * addressing token. */
static void shader_sm1_read_param(struct vkd3d_shader_sm1_parser *sm1,
        const uint32_t **ptr, uint32_t *token, uint32_t *addr_token)
{
    if (*ptr >= sm1->end)
    {
        vkd3d_shader_parser_error(&sm1->p, VKD3D_SHADER_ERROR_D3DBC_UNEXPECTED_EOF,
                "Attempted to read a parameter token, but no more tokens are remaining.");
        sm1->abort = true;
        *token = 0;
        return;
    }
    *token = read_u32(ptr);
    if (!has_relative_address(*token))
        return;

    /* PS >= 3.0 have relative addressing (with token)
     * VS >= 2.0 have relative addressing (with token)
     * VS >= 1.0 < 2.0 have relative addressing (without token)
     * The version check below should work in general. */
    if (sm1->p.shader_version.major < 2)
    {
        *addr_token = (1u << 31)
                | ((VKD3DSPR_ADDR << VKD3D_SM1_REGISTER_TYPE_SHIFT2) & VKD3D_SM1_REGISTER_TYPE_MASK2)
                | ((VKD3DSPR_ADDR << VKD3D_SM1_REGISTER_TYPE_SHIFT) & VKD3D_SM1_REGISTER_TYPE_MASK)
                | (VKD3D_SM1_SWIZZLE_DEFAULT << VKD3D_SM1_SWIZZLE_SHIFT);
        return;
    }

    if (*ptr >= sm1->end)
    {
        vkd3d_shader_parser_error(&sm1->p, VKD3D_SHADER_ERROR_D3DBC_UNEXPECTED_EOF,
                "Attempted to read an indirect addressing token, but no more tokens are remaining.");
        sm1->abort = true;
        *addr_token = 0;
        return;
    }
    *addr_token = read_u32(ptr);
}

/* Skip the parameter tokens for an opcode. */
static void shader_sm1_skip_opcode(const struct vkd3d_shader_sm1_parser *sm1, const uint32_t **ptr,
        const struct vkd3d_sm1_opcode_info *opcode_info, uint32_t opcode_token)
{
    unsigned int length;

    /* Version 2.0+ shaders may contain address tokens, but fortunately they
     * have a useful length mask - use it here. Version 1.x shaders contain no
     * such tokens. */
    if (sm1->p.shader_version.major >= 2)
    {
        length = (opcode_token & VKD3D_SM1_INSTRUCTION_LENGTH_MASK) >> VKD3D_SM1_INSTRUCTION_LENGTH_SHIFT;
        *ptr += length;
        return;
    }

    *ptr += (opcode_info->dst_count + opcode_info->src_count);
}

static void shader_sm1_destroy(struct vkd3d_shader_parser *parser)
{
    struct vkd3d_shader_sm1_parser *sm1 = vkd3d_shader_sm1_parser(parser);

    free_shader_desc(&sm1->p.shader_desc);
    vkd3d_free(sm1);
}

static void shader_sm1_read_src_param(struct vkd3d_shader_sm1_parser *sm1, const uint32_t **ptr,
        struct vkd3d_shader_src_param *src_param, struct vkd3d_shader_src_param *src_rel_addr)
{
    uint32_t token, addr_token;

    shader_sm1_read_param(sm1, ptr, &token, &addr_token);
    if (has_relative_address(token))
        shader_sm1_parse_src_param(addr_token, NULL, src_rel_addr);
    else
        src_rel_addr = NULL;
    shader_sm1_parse_src_param(token, src_rel_addr, src_param);
}

static void shader_sm1_read_dst_param(struct vkd3d_shader_sm1_parser *sm1, const uint32_t **ptr,
        struct vkd3d_shader_dst_param *dst_param, struct vkd3d_shader_src_param *dst_rel_addr)
{
    uint32_t token, addr_token;

    shader_sm1_read_param(sm1, ptr, &token, &addr_token);
    if (has_relative_address(token))
        shader_sm1_parse_src_param(addr_token, NULL, dst_rel_addr);
    else
        dst_rel_addr = NULL;
    shader_sm1_parse_dst_param(token, dst_rel_addr, dst_param);
}

static void shader_sm1_read_semantic(struct vkd3d_shader_sm1_parser *sm1,
        const uint32_t **ptr, struct vkd3d_shader_semantic *semantic)
{
    enum vkd3d_sm1_resource_type resource_type;
    struct vkd3d_shader_register_range *range;
    uint32_t usage_token, dst_token;

    if (*ptr >= sm1->end || sm1->end - *ptr < 2)
    {
        vkd3d_shader_parser_error(&sm1->p, VKD3D_SHADER_ERROR_D3DBC_UNEXPECTED_EOF,
                "Attempted to read a declaration instruction, but not enough tokens are remaining.");
        sm1->abort = true;
        return;
    }

    usage_token = read_u32(ptr);
    dst_token = read_u32(ptr);

    semantic->usage = (usage_token & VKD3D_SM1_DCL_USAGE_MASK) >> VKD3D_SM1_DCL_USAGE_SHIFT;
    semantic->usage_idx = (usage_token & VKD3D_SM1_DCL_USAGE_INDEX_MASK) >> VKD3D_SM1_DCL_USAGE_INDEX_SHIFT;
    resource_type = (usage_token & VKD3D_SM1_RESOURCE_TYPE_MASK) >> VKD3D_SM1_RESOURCE_TYPE_SHIFT;
    if (resource_type >= ARRAY_SIZE(resource_type_table))
    {
        vkd3d_shader_parser_error(&sm1->p, VKD3D_SHADER_ERROR_D3DBC_INVALID_RESOURCE_TYPE,
                "Invalid resource type %#x.", resource_type);
        semantic->resource_type = VKD3D_SHADER_RESOURCE_NONE;
    }
    else
    {
        semantic->resource_type = resource_type_table[resource_type];
    }
    semantic->resource_data_type[0] = VKD3D_DATA_FLOAT;
    semantic->resource_data_type[1] = VKD3D_DATA_FLOAT;
    semantic->resource_data_type[2] = VKD3D_DATA_FLOAT;
    semantic->resource_data_type[3] = VKD3D_DATA_FLOAT;
    shader_sm1_parse_dst_param(dst_token, NULL, &semantic->resource.reg);
    range = &semantic->resource.range;
    range->space = 0;
    range->first = range->last = semantic->resource.reg.reg.idx[0].offset;
}

static void shader_sm1_read_immconst(struct vkd3d_shader_sm1_parser *sm1, const uint32_t **ptr,
        struct vkd3d_shader_src_param *src_param, enum vkd3d_immconst_type type, enum vkd3d_data_type data_type)
{
    unsigned int count = type == VKD3D_IMMCONST_VEC4 ? 4 : 1;

    if (*ptr >= sm1->end || sm1->end - *ptr < count)
    {
        vkd3d_shader_parser_error(&sm1->p, VKD3D_SHADER_ERROR_D3DBC_UNEXPECTED_EOF,
                "Attempted to read a constant definition, but not enough tokens are remaining. "
                "%zu token(s) available, %u required.", sm1->end - *ptr, count);
        sm1->abort = true;
        return;
    }

    src_param->reg.type = VKD3DSPR_IMMCONST;
    src_param->reg.precision = VKD3D_SHADER_REGISTER_PRECISION_DEFAULT;
    src_param->reg.non_uniform = false;
    src_param->reg.data_type = data_type;
    src_param->reg.idx[0].offset = ~0u;
    src_param->reg.idx[0].rel_addr = NULL;
    src_param->reg.idx[1].offset = ~0u;
    src_param->reg.idx[1].rel_addr = NULL;
    src_param->reg.idx[2].offset = ~0u;
    src_param->reg.idx[2].rel_addr = NULL;
    src_param->reg.immconst_type = type;
    memcpy(src_param->reg.u.immconst_uint, *ptr, count * sizeof(uint32_t));
    src_param->swizzle = VKD3D_SHADER_NO_SWIZZLE;
    src_param->modifiers = 0;

    *ptr += count;
}

static void shader_sm1_read_comment(struct vkd3d_shader_sm1_parser *sm1)
{
    const uint32_t **ptr = &sm1->p.ptr;
    const char *comment;
    unsigned int size;
    size_t remaining;
    uint32_t token;

    if (*ptr >= sm1->end)
        return;

    remaining = sm1->end - *ptr;

    token = **ptr;
    while ((token & VKD3D_SM1_OPCODE_MASK) == VKD3D_SM1_OP_COMMENT)
    {
        size = (token & VKD3D_SM1_COMMENT_SIZE_MASK) >> VKD3D_SM1_COMMENT_SIZE_SHIFT;

        if (size > --remaining)
        {
            vkd3d_shader_parser_error(&sm1->p, VKD3D_SHADER_ERROR_D3DBC_UNEXPECTED_EOF,
                    "Encountered a %u token comment, but only %zu token(s) is/are remaining.",
                    size, remaining);
            return;
        }

        comment = (const char *)++(*ptr);
        remaining -= size;
        *ptr += size;

        if (size > 1 && *(const uint32_t *)comment == TAG_TEXT)
        {
            const char *end = comment + size * sizeof(token);
            const char *p = comment + sizeof(token);
            const char *line;

            TRACE("// TEXT\n");
            for (line = p; line < end; line = p)
            {
                if (!(p = memchr(line, '\n', end - line)))
                    p = end;
                else
                    ++p;
                TRACE("// %s\n", debugstr_an(line, p - line));
            }
        }
        else if (size)
        {
            TRACE("// %s\n", debugstr_an(comment, size * sizeof(token)));
        }
        else
            break;

        if (!remaining)
            break;
        token = **ptr;
    }
}

static void shader_sm1_validate_instruction(struct vkd3d_shader_sm1_parser *sm1, struct vkd3d_shader_instruction *ins)
{
    if ((ins->handler_idx == VKD3DSIH_BREAKP || ins->handler_idx == VKD3DSIH_IF) && ins->flags)
    {
        vkd3d_shader_parser_warning(&sm1->p, VKD3D_SHADER_WARNING_D3DBC_IGNORED_INSTRUCTION_FLAGS,
                "Ignoring unexpected instruction flags %#x.", ins->flags);
        ins->flags = 0;
    }
}

static void shader_sm1_read_instruction(struct vkd3d_shader_parser *parser, struct vkd3d_shader_instruction *ins)
{
    struct vkd3d_shader_sm1_parser *sm1 = vkd3d_shader_sm1_parser(parser);
    const struct vkd3d_sm1_opcode_info *opcode_info;
    const uint32_t **ptr = &parser->ptr;
    uint32_t opcode_token;
    const uint32_t *p;
    unsigned int i;

    shader_sm1_read_comment(sm1);

    if (*ptr >= sm1->end)
    {
        WARN("End of byte-code, failed to read opcode.\n");
        goto fail;
    }

    ++parser->location.line;
    opcode_token = read_u32(ptr);
    if (!(opcode_info = shader_sm1_get_opcode_info(sm1, opcode_token & VKD3D_SM1_OPCODE_MASK)))
    {
        vkd3d_shader_parser_error(parser, VKD3D_SHADER_ERROR_D3DBC_INVALID_OPCODE,
                "Invalid opcode %#x (token 0x%08x, shader version %u.%u).",
                opcode_token & VKD3D_SM1_OPCODE_MASK, opcode_token,
                sm1->p.shader_version.major, sm1->p.shader_version.minor);
        goto fail;
    }

    ins->handler_idx = opcode_info->vkd3d_opcode;
    ins->flags = (opcode_token & VKD3D_SM1_INSTRUCTION_FLAGS_MASK) >> VKD3D_SM1_INSTRUCTION_FLAGS_SHIFT;
    ins->coissue = opcode_token & VKD3D_SM1_COISSUE;
    ins->raw = false;
    ins->structured = false;
    ins->predicate = opcode_token & VKD3D_SM1_INSTRUCTION_PREDICATED ? &sm1->pred_param : NULL;
    ins->dst_count = opcode_info->dst_count;
    ins->dst = &sm1->dst_param;
    ins->src_count = opcode_info->src_count;
    ins->src = sm1->src_param;
    ins->resource_type = VKD3D_SHADER_RESOURCE_NONE;
    ins->resource_stride = 0;
    ins->resource_data_type[0] = VKD3D_DATA_FLOAT;
    ins->resource_data_type[1] = VKD3D_DATA_FLOAT;
    ins->resource_data_type[2] = VKD3D_DATA_FLOAT;
    ins->resource_data_type[3] = VKD3D_DATA_FLOAT;
    memset(&ins->texel_offset, 0, sizeof(ins->texel_offset));

    p = *ptr;
    shader_sm1_skip_opcode(sm1, ptr, opcode_info, opcode_token);
    if (*ptr > sm1->end)
    {
        vkd3d_shader_parser_error(&sm1->p, VKD3D_SHADER_ERROR_D3DBC_UNEXPECTED_EOF,
                "The current instruction ends %zu token(s) past the end of the shader.",
                *ptr - sm1->end);
        goto fail;
    }

    if (ins->handler_idx == VKD3DSIH_DCL)
    {
        shader_sm1_read_semantic(sm1, &p, &ins->declaration.semantic);
    }
    else if (ins->handler_idx == VKD3DSIH_DEF)
    {
        shader_sm1_read_dst_param(sm1, &p, &sm1->dst_param, &sm1->dst_rel_addr);
        shader_sm1_read_immconst(sm1, &p, &sm1->src_param[0], VKD3D_IMMCONST_VEC4, VKD3D_DATA_FLOAT);
    }
    else if (ins->handler_idx == VKD3DSIH_DEFB)
    {
        shader_sm1_read_dst_param(sm1, &p, &sm1->dst_param, &sm1->dst_rel_addr);
        shader_sm1_read_immconst(sm1, &p, &sm1->src_param[0], VKD3D_IMMCONST_SCALAR, VKD3D_DATA_UINT);
    }
    else if (ins->handler_idx == VKD3DSIH_DEFI)
    {
        shader_sm1_read_dst_param(sm1, &p, &sm1->dst_param, &sm1->dst_rel_addr);
        shader_sm1_read_immconst(sm1, &p, &sm1->src_param[0], VKD3D_IMMCONST_VEC4, VKD3D_DATA_INT);
    }
    else
    {
        /* Destination token */
        if (ins->dst_count)
            shader_sm1_read_dst_param(sm1, &p, &sm1->dst_param, &sm1->dst_rel_addr);

        /* Predication token */
        if (ins->predicate)
            shader_sm1_read_src_param(sm1, &p, &sm1->pred_param, &sm1->pred_rel_addr);

        /* Other source tokens */
        for (i = 0; i < ins->src_count; ++i)
            shader_sm1_read_src_param(sm1, &p, &sm1->src_param[i], &sm1->src_rel_addr[i]);
    }

    if (sm1->abort)
    {
        sm1->abort = false;
        goto fail;
    }

    shader_sm1_validate_instruction(sm1, ins);
    return;

fail:
    ins->handler_idx = VKD3DSIH_INVALID;
    *ptr = sm1->end;
}

static bool shader_sm1_is_end(struct vkd3d_shader_parser *parser)
{
    struct vkd3d_shader_sm1_parser *sm1 = vkd3d_shader_sm1_parser(parser);
    const uint32_t **ptr = &parser->ptr;

    shader_sm1_read_comment(sm1);

    if (*ptr >= sm1->end)
        return true;

    if (**ptr == VKD3D_SM1_END)
    {
        ++(*ptr);
        return true;
    }

    return false;
}

static void shader_sm1_reset(struct vkd3d_shader_parser *parser)
{
    struct vkd3d_shader_sm1_parser *sm1 = vkd3d_shader_sm1_parser(parser);

    parser->ptr = sm1->start;
    parser->failed = false;
}

const struct vkd3d_shader_parser_ops shader_sm1_parser_ops =
{
    .parser_reset = shader_sm1_reset,
    .parser_destroy = shader_sm1_destroy,
    .parser_read_instruction = shader_sm1_read_instruction,
    .parser_is_end = shader_sm1_is_end,
};

static enum vkd3d_result shader_sm1_init(struct vkd3d_shader_sm1_parser *sm1,
        const struct vkd3d_shader_compile_info *compile_info, struct vkd3d_shader_message_context *message_context)
{
    const struct vkd3d_shader_location location = {.source_name = compile_info->source_name};
    const uint32_t *code = compile_info->source.code;
    size_t code_size = compile_info->source.size;
    struct vkd3d_shader_desc *shader_desc;
    struct vkd3d_shader_version version;
    uint16_t shader_type;
    size_t token_count;

    token_count = code_size / sizeof(*sm1->start);

    if (token_count < 2)
    {
        vkd3d_shader_error(message_context, &location, VKD3D_SHADER_ERROR_D3DBC_UNEXPECTED_EOF,
                "Invalid shader size %zu (token count %zu). At least 2 tokens are required.",
                code_size, token_count);
        return VKD3D_ERROR_INVALID_SHADER;
    }

    TRACE("Version: 0x%08x.\n", code[0]);

    shader_type = code[0] >> 16;
    version.major = VKD3D_SM1_VERSION_MAJOR(code[0]);
    version.minor = VKD3D_SM1_VERSION_MINOR(code[0]);

    switch (shader_type)
    {
        case VKD3D_SM1_VS:
            version.type = VKD3D_SHADER_TYPE_VERTEX;
            sm1->opcode_table = vs_opcode_table;
            break;

        case VKD3D_SM1_PS:
            version.type = VKD3D_SHADER_TYPE_PIXEL;
            sm1->opcode_table = ps_opcode_table;
            break;

        default:
            vkd3d_shader_error(message_context, &location, VKD3D_SHADER_ERROR_D3DBC_INVALID_VERSION_TOKEN,
                    "Invalid shader type %#x (token 0x%08x).", shader_type, code[0]);
            return VKD3D_ERROR_INVALID_SHADER;
    }

    if (!shader_ver_le(&version, 3, 0))
    {
        vkd3d_shader_error(message_context, &location, VKD3D_SHADER_ERROR_D3DBC_INVALID_VERSION_TOKEN,
                "Invalid shader version %u.%u (token 0x%08x).", version.major, version.minor, code[0]);
        return VKD3D_ERROR_INVALID_SHADER;
    }

    sm1->start = &code[1];
    sm1->end = &code[token_count];

    vkd3d_shader_parser_init(&sm1->p, message_context, compile_info->source_name, &version, &shader_sm1_parser_ops);
    shader_desc = &sm1->p.shader_desc;
    shader_desc->byte_code = code;
    shader_desc->byte_code_size = code_size;
    sm1->p.ptr = sm1->start;

    return VKD3D_OK;
}

int vkd3d_shader_sm1_parser_create(const struct vkd3d_shader_compile_info *compile_info,
        struct vkd3d_shader_message_context *message_context, struct vkd3d_shader_parser **parser)
{
    struct vkd3d_shader_sm1_parser *sm1;
    int ret;

    if (!(sm1 = vkd3d_calloc(1, sizeof(*sm1))))
    {
        ERR("Failed to allocate parser.\n");
        return VKD3D_ERROR_OUT_OF_MEMORY;
    }

    if ((ret = shader_sm1_init(sm1, compile_info, message_context)) < 0)
    {
        WARN("Failed to initialise shader parser, ret %d.\n", ret);
        vkd3d_free(sm1);
        return ret;
    }

    *parser = &sm1->p;

    return VKD3D_OK;
}