src/panfrost/midgard/disassemble.c

   1 /* Author(s):
   2  *   Connor Abbott
   3  *   Alyssa Rosenzweig
   4  *
   5  * Copyright (c) 2013 Connor Abbott (connor@abbott.cx)
   6  * Copyright (c) 2018 Alyssa Rosenzweig (alyssa@rosenzweig.io)
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26
  27 #include <stdio.h>
  28 #include <stdint.h>
  29 #include <stdlib.h>
  30 #include <assert.h>
  31 #include <inttypes.h>
  32 #include <ctype.h>
  33 #include <string.h>
  34 #include "midgard.h"
  35 #include "midgard-parse.h"
  36 #include "midgard_ops.h"
  37 #include "disassemble.h"
  38 #include "helpers.h"
  39 #include "util/half_float.h"
  40 #include "util/u_math.h"
  41
  42 #define DEFINE_CASE(define, str) case define: { printf(str); break; }
  43
  44 static unsigned *midg_tags;
  45 static bool is_instruction_int = false;
  46
  47 /* Stats */
  48
  49 static struct midgard_disasm_stats midg_stats;
  50
  51 /* Prints a short form of the tag for branching, the minimum needed to be
  52  * legible and unambiguous */
  53
  54 static void
  55 print_tag_short(unsigned tag)
  56 {
  57         switch (midgard_word_types[tag]) {
  58         case midgard_word_type_texture:
  59                 printf("tex/%X", tag);
  60                 break;
  61
  62         case midgard_word_type_load_store:
  63                 printf("ldst");
  64                 break;
  65
  66         case midgard_word_type_alu:
  67                 printf("alu%u/%X", midgard_word_size[tag], tag);
  68                 break;
  69
  70         default:
  71                 printf("%s%X", (tag > 0) ? "" : "unk", tag);
  72                 break;
  73         }
  74 }
  75
  76 static void
  77 print_alu_opcode(midgard_alu_op op)
  78 {
  79         bool int_op = false;
  80
  81         if (alu_opcode_props[op].name) {
  82                 printf("%s", alu_opcode_props[op].name);
  83
  84                 int_op = midgard_is_integer_op(op);
  85         } else
  86                 printf("alu_op_%02X", op);
  87
  88         /* For constant analysis */
  89         is_instruction_int = int_op;
  90 }
  91
  92 static void
  93 print_ld_st_opcode(midgard_load_store_op op)
  94 {
  95         if (load_store_opcode_props[op].name)
  96                 printf("%s", load_store_opcode_props[op].name);
  97         else
  98                 printf("ldst_op_%02X", op);
  99 }
 100
 101 static bool is_embedded_constant_half = false;
 102 static bool is_embedded_constant_int = false;
 103
 104 static char
 105 prefix_for_bits(unsigned bits)
 106 {
 107         switch (bits) {
 108         case 8:
 109                 return 'q';
 110         case 16:
 111                 return 'h';
 112         case 64:
 113                 return 'd';
 114         default:
 115                 return 0;
 116         }
 117 }
 118
 119 /* For static analysis to ensure all registers are written at least once before
 120  * use along the source code path (TODO: does this break done for complex CF?)
 121  */
 122
 123 uint16_t midg_ever_written = 0;
 124
 125 static void
 126 print_reg(unsigned reg, unsigned bits)
 127 {
 128         /* Perform basic static analysis for expanding constants correctly */
 129
 130         if (reg == 26) {
 131                 is_embedded_constant_int = is_instruction_int;
 132                 is_embedded_constant_half = (bits < 32);
 133         }
 134
 135         unsigned uniform_reg = 23 - reg;
 136         bool is_uniform = false;
 137
 138         /* For r8-r15, it could be a work or uniform. We distinguish based on
 139          * the fact work registers are ALWAYS written before use, but uniform
 140          * registers are NEVER written before use. */
 141
 142         if ((reg >= 8 && reg < 16) && !(midg_ever_written & (1 << reg)))
 143                 is_uniform = true;
 144
 145         /* r16-r23 are always uniform */
 146
 147         if (reg >= 16 && reg <= 23)
 148                 is_uniform = true;
 149
 150         /* Update the uniform count appropriately */
 151
 152         if (is_uniform)
 153                 midg_stats.uniform_count =
 154                         MAX2(uniform_reg + 1, midg_stats.uniform_count);
 155
 156         char prefix = prefix_for_bits(bits);
 157
 158         if (prefix)
 159                 putchar(prefix);
 160
 161         printf("r%u", reg);
 162 }
 163
 164 static char *outmod_names_float[4] = {
 165         "",
 166         ".pos",
 167         ".unk2",
 168         ".sat"
 169 };
 170
 171 static char *outmod_names_int[4] = {
 172         ".isat",
 173         ".usat",
 174         "",
 175         ".hi"
 176 };
 177
 178 static char *srcmod_names_int[4] = {
 179         "sext(",
 180         "zext(",
 181         "",
 182         "("
 183 };
 184
 185 static void
 186 print_outmod(unsigned outmod, bool is_int)
 187 {
 188         printf("%s", is_int ? outmod_names_int[outmod] :
 189                outmod_names_float[outmod]);
 190 }
 191
 192 static void
 193 print_quad_word(uint32_t *words, unsigned tabs)
 194 {
 195         unsigned i;
 196
 197         for (i = 0; i < 4; i++)
 198                 printf("0x%08X%s ", words[i], i == 3 ? "" : ",");
 199
 200         printf("\n");
 201 }
 202
 203 static const char components[16] = "xyzwefghijklmnop";
 204
 205 /* Helper to print 4 chars of a swizzle */
 206 static void
 207 print_swizzle_helper(unsigned swizzle, bool upper)
 208 {
 209         for (unsigned i = 0; i < 4; ++i) {
 210                 unsigned c = (swizzle >> (i * 2)) & 3;
 211                 c += upper*4;
 212                 printf("%c", components[c]);
 213         }
 214 }
 215
 216 /* Helper to print 8 chars of a swizzle, duplicating over */
 217 static void
 218 print_swizzle_helper_8(unsigned swizzle, bool upper)
 219 {
 220         for (unsigned i = 0; i < 4; ++i) {
 221                 unsigned c = (swizzle >> (i * 2)) & 3;
 222                 c *= 2;
 223                 c += upper*8;
 224                 printf("%c%c", components[c], components[c+1]);
 225         }
 226 }
 227
 228 static void
 229 print_swizzle_vec16(unsigned swizzle, bool rep_high, bool rep_low,
 230                     midgard_dest_override override)
 231 {
 232         printf(".");
 233
 234         if (override == midgard_dest_override_upper) {
 235                 if (rep_high)
 236                         printf(" /* rep_high */ ");
 237                 if (rep_low)
 238                         printf(" /* rep_low */ ");
 239
 240                 if (!rep_high && rep_low)
 241                         print_swizzle_helper_8(swizzle, true);
 242                 else
 243                         print_swizzle_helper_8(swizzle, false);
 244         } else {
 245                 print_swizzle_helper_8(swizzle, rep_high & 1);
 246                 print_swizzle_helper_8(swizzle, !(rep_low & 1));
 247         }
 248 }
 249
 250 static void
 251 print_swizzle_vec8(unsigned swizzle, bool rep_high, bool rep_low)
 252 {
 253         printf(".");
 254
 255         print_swizzle_helper(swizzle, rep_high & 1);
 256         print_swizzle_helper(swizzle, !(rep_low & 1));
 257 }
 258
 259 static void
 260 print_swizzle_vec4(unsigned swizzle, bool rep_high, bool rep_low)
 261 {
 262         if (rep_high)
 263                 printf(" /* rep_high */ ");
 264         if (rep_low)
 265                 printf(" /* rep_low */ ");
 266
 267         if (swizzle == 0xE4) return; /* xyzw */
 268
 269         printf(".");
 270         print_swizzle_helper(swizzle, 0);
 271 }
 272 static void
 273 print_swizzle_vec2(unsigned swizzle, bool rep_high, bool rep_low)
 274 {
 275         if (rep_high)
 276                 printf(" /* rep_high */ ");
 277         if (rep_low)
 278                 printf(" /* rep_low */ ");
 279
 280         if (swizzle == 0xE4) return; /* XY */
 281
 282         printf(".");
 283
 284         for (unsigned i = 0; i < 4; i += 2) {
 285                 unsigned a = (swizzle >> (i * 2)) & 3;
 286                 unsigned b = (swizzle >> ((i+1) * 2)) & 3;
 287
 288                 /* Normally we're adjacent, but if there's an issue, don't make
 289                  * it ambiguous */
 290
 291                 if (a & 0x1)
 292                         printf("[%c%c]", components[a], components[b]);
 293                 else if (a == b)
 294                         printf("%c", components[a >> 1]);
 295                 else if (b == (a + 1))
 296                         printf("%c", "XY"[a >> 1]);
 297                 else
 298                         printf("[%c%c]", components[a], components[b]);
 299         }
 300 }
 301
 302 static int
 303 bits_for_mode(midgard_reg_mode mode)
 304 {
 305         switch (mode) {
 306         case midgard_reg_mode_8:
 307                 return 8;
 308         case midgard_reg_mode_16:
 309                 return 16;
 310         case midgard_reg_mode_32:
 311                 return 32;
 312         case midgard_reg_mode_64:
 313                 return 64;
 314         default:
 315                 unreachable("Invalid reg mode");
 316                 return 0;
 317         }
 318 }
 319
 320 static int
 321 bits_for_mode_halved(midgard_reg_mode mode, bool half)
 322 {
 323         unsigned bits = bits_for_mode(mode);
 324
 325         if (half)
 326                 bits >>= 1;
 327
 328         return bits;
 329 }
 330
 331 static void
 332 print_vector_src(unsigned src_binary,
 333                  midgard_reg_mode mode, unsigned reg,
 334                  midgard_dest_override override, bool is_int)
 335 {
 336         midgard_vector_alu_src *src = (midgard_vector_alu_src *)&src_binary;
 337
 338         /* Modifiers change meaning depending on the op's context */
 339
 340         midgard_int_mod int_mod = src->mod;
 341
 342         if (is_int) {
 343                 printf("%s", srcmod_names_int[int_mod]);
 344         } else {
 345                 if (src->mod & MIDGARD_FLOAT_MOD_NEG)
 346                         printf("-");
 347
 348                 if (src->mod & MIDGARD_FLOAT_MOD_ABS)
 349                         printf("abs(");
 350         }
 351
 352         //register
 353         unsigned bits = bits_for_mode_halved(mode, src->half);
 354         print_reg(reg, bits);
 355
 356         //swizzle
 357         if (bits == 16)
 358                 print_swizzle_vec8(src->swizzle, src->rep_high, src->rep_low);
 359         else if (bits == 8)
 360                 print_swizzle_vec16(src->swizzle, src->rep_high, src->rep_low, override);
 361         else if (bits == 32)
 362                 print_swizzle_vec4(src->swizzle, src->rep_high, src->rep_low);
 363         else if (bits == 64)
 364                 print_swizzle_vec2(src->swizzle, src->rep_high, src->rep_low);
 365
 366         /* Since we wrapped with a function-looking thing */
 367
 368         if (is_int && int_mod == midgard_int_shift)
 369                 printf(") << %u", bits);
 370         else if ((is_int && (int_mod != midgard_int_normal))
 371                  || (!is_int && src->mod & MIDGARD_FLOAT_MOD_ABS))
 372                 printf(")");
 373 }
 374
 375 static uint16_t
 376 decode_vector_imm(unsigned src2_reg, unsigned imm)
 377 {
 378         uint16_t ret;
 379         ret = src2_reg << 11;
 380         ret |= (imm & 0x7) << 8;
 381         ret |= (imm >> 3) & 0xFF;
 382         return ret;
 383 }
 384
 385 static void
 386 print_immediate(uint16_t imm)
 387 {
 388         if (is_instruction_int)
 389                 printf("#%u", imm);
 390         else
 391                 printf("#%g", _mesa_half_to_float(imm));
 392 }
 393
 394 static void
 395 update_dest(unsigned reg)
 396 {
 397         /* We should record writes as marking this as a work register. Store
 398          * the max register in work_count; we'll add one at the end */
 399
 400         if (reg < 16) {
 401                 midg_stats.work_count = MAX2(reg, midg_stats.work_count);
 402                 midg_ever_written |= (1 << reg);
 403         }
 404 }
 405
 406 static void
 407 print_dest(unsigned reg, midgard_reg_mode mode, midgard_dest_override override)
 408 {
 409         /* Depending on the mode and override, we determine the type of
 410          * destination addressed. Absent an override, we address just the
 411          * type of the operation itself */
 412
 413         unsigned bits = bits_for_mode(mode);
 414
 415         if (override != midgard_dest_override_none)
 416                 bits /= 2;
 417
 418         update_dest(reg);
 419         print_reg(reg, bits);
 420 }
 421
 422 static void
 423 print_mask_vec16(uint8_t mask, midgard_dest_override override)
 424 {
 425         printf(".");
 426
 427         for (unsigned i = 0; i < 8; i++) {
 428                 if (mask & (1 << i))
 429                         printf("%c%c",
 430                                components[i*2 + 0],
 431                                components[i*2 + 1]);
 432         }
 433 }
 434
 435 /* For 16-bit+ masks, we read off from the 8-bit mask field. For 16-bit (vec8),
 436  * it's just one bit per channel, easy peasy. For 32-bit (vec4), it's one bit
 437  * per channel with one duplicate bit in the middle. For 64-bit (vec2), it's
 438  * one-bit per channel with _3_ duplicate bits in the middle. Basically, just
 439  * subdividing the 128-bit word in 16-bit increments. For 64-bit, we uppercase
 440  * the mask to make it obvious what happened */
 441
 442 static void
 443 print_mask(uint8_t mask, unsigned bits, midgard_dest_override override)
 444 {
 445         if (bits == 8) {
 446                 print_mask_vec16(mask, override);
 447                 return;
 448         }
 449
 450         /* Skip 'complete' masks */
 451
 452         if (override == midgard_dest_override_none) {
 453                 if (bits >= 32 && mask == 0xFF) return;
 454
 455                 if (bits == 16) {
 456                         if (mask == 0x0F)
 457                                 return;
 458                         else if (mask == 0xF0) {
 459                                 printf("'");
 460                                 return;
 461                         }
 462                 }
 463         }
 464
 465         printf(".");
 466
 467         unsigned skip = (bits / 16);
 468         bool uppercase = bits > 32;
 469         bool tripped = false;
 470
 471         /* To apply an upper destination override, we "shift" the alphabet.
 472          * E.g. with an upper override on 32-bit, instead of xyzw, print efgh.
 473          * For upper 16-bit, instead of xyzwefgh, print ijklmnop */
 474
 475         const char *alphabet = components;
 476
 477         if (override == midgard_dest_override_upper) {
 478                 unsigned components = 128 / bits;
 479                 alphabet += components;
 480         }
 481
 482         for (unsigned i = 0; i < 8; i += skip) {
 483                 bool a = (mask & (1 << i)) != 0;
 484
 485                 for (unsigned j = 1; j < skip; ++j) {
 486                         bool dupe = (mask & (1 << (i + j))) != 0;
 487                         tripped |= (dupe != a);
 488                 }
 489
 490                 if (a) {
 491                         char c = alphabet[i / skip];
 492
 493                         if (uppercase)
 494                                 c = toupper(c);
 495
 496                         printf("%c", c);
 497                 }
 498         }
 499
 500         if (tripped)
 501                 printf(" /* %X */", mask);
 502 }
 503
 504 /* Prints the 4-bit masks found in texture and load/store ops, as opposed to
 505  * the 8-bit masks found in (vector) ALU ops */
 506
 507 static void
 508 print_mask_4(unsigned mask)
 509 {
 510         if (mask == 0xF) return;
 511
 512         printf(".");
 513
 514         for (unsigned i = 0; i < 4; ++i) {
 515                 bool a = (mask & (1 << i)) != 0;
 516                 if (a)
 517                         printf("%c", components[i]);
 518         }
 519 }
 520
 521 static void
 522 print_vector_field(const char *name, uint16_t *words, uint16_t reg_word,
 523                    unsigned tabs)
 524 {
 525         midgard_reg_info *reg_info = (midgard_reg_info *)&reg_word;
 526         midgard_vector_alu *alu_field = (midgard_vector_alu *) words;
 527         midgard_reg_mode mode = alu_field->reg_mode;
 528         unsigned override = alu_field->dest_override;
 529
 530         /* For now, prefix instruction names with their unit, until we
 531          * understand how this works on a deeper level */
 532         printf("%s.", name);
 533
 534         print_alu_opcode(alu_field->op);
 535
 536         /* Postfix with the size to disambiguate if necessary */
 537         char postfix = prefix_for_bits(bits_for_mode(mode));
 538         bool size_ambiguous = override != midgard_dest_override_none;
 539
 540         if (size_ambiguous)
 541                 printf("%c", postfix ? postfix : 'r');
 542
 543         /* Print the outmod, if there is one */
 544         print_outmod(alu_field->outmod,
 545                      midgard_is_integer_out_op(alu_field->op));
 546
 547         printf(" ");
 548
 549         /* Mask denoting status of 8-lanes */
 550         uint8_t mask = alu_field->mask;
 551
 552         /* First, print the destination */
 553         print_dest(reg_info->out_reg, mode, alu_field->dest_override);
 554
 555         if (override != midgard_dest_override_none) {
 556                 bool modeable = (mode != midgard_reg_mode_8);
 557                 bool known = override != 0x3; /* Unused value */
 558
 559                 if (!(modeable && known))
 560                         printf("/* do%u */ ", override);
 561         }
 562
 563         print_mask(mask, bits_for_mode(mode), override);
 564
 565         printf(", ");
 566
 567         bool is_int = midgard_is_integer_op(alu_field->op);
 568         print_vector_src(alu_field->src1, mode, reg_info->src1_reg, override, is_int);
 569
 570         printf(", ");
 571
 572         if (reg_info->src2_imm) {
 573                 uint16_t imm = decode_vector_imm(reg_info->src2_reg, alu_field->src2 >> 2);
 574                 print_immediate(imm);
 575         } else {
 576                 print_vector_src(alu_field->src2, mode,
 577                                  reg_info->src2_reg, override, is_int);
 578         }
 579
 580         midg_stats.instruction_count++;
 581         printf("\n");
 582 }
 583
 584 static void
 585 print_scalar_src(unsigned src_binary, unsigned reg)
 586 {
 587         midgard_scalar_alu_src *src = (midgard_scalar_alu_src *)&src_binary;
 588
 589         if (src->negate)
 590                 printf("-");
 591
 592         if (src->abs)
 593                 printf("abs(");
 594
 595         print_reg(reg, src->full ? 32 : 16);
 596
 597         unsigned c = src->component;
 598
 599         if (src->full) {
 600                 assert((c & 1) == 0);
 601                 c >>= 1;
 602         }
 603
 604         printf(".%c", components[c]);
 605
 606         if (src->abs)
 607                 printf(")");
 608
 609 }
 610
 611 static uint16_t
 612 decode_scalar_imm(unsigned src2_reg, unsigned imm)
 613 {
 614         uint16_t ret;
 615         ret = src2_reg << 11;
 616         ret |= (imm & 3) << 9;
 617         ret |= (imm & 4) << 6;
 618         ret |= (imm & 0x38) << 2;
 619         ret |= imm >> 6;
 620         return ret;
 621 }
 622
 623 static void
 624 print_scalar_field(const char *name, uint16_t *words, uint16_t reg_word,
 625                    unsigned tabs)
 626 {
 627         midgard_reg_info *reg_info = (midgard_reg_info *)&reg_word;
 628         midgard_scalar_alu *alu_field = (midgard_scalar_alu *) words;
 629
 630         if (alu_field->unknown)
 631                 printf("scalar ALU unknown bit set\n");
 632
 633         printf("%s.", name);
 634         print_alu_opcode(alu_field->op);
 635         print_outmod(alu_field->outmod,
 636                      midgard_is_integer_out_op(alu_field->op));
 637         printf(" ");
 638
 639         bool full = alu_field->output_full;
 640         update_dest(reg_info->out_reg);
 641         print_reg(reg_info->out_reg, full ? 32 : 16);
 642         unsigned c = alu_field->output_component;
 643
 644         if (full) {
 645                 assert((c & 1) == 0);
 646                 c >>= 1;
 647         }
 648
 649         printf(".%c, ", components[c]);
 650
 651         print_scalar_src(alu_field->src1, reg_info->src1_reg);
 652
 653         printf(", ");
 654
 655         if (reg_info->src2_imm) {
 656                 uint16_t imm = decode_scalar_imm(reg_info->src2_reg,
 657                                                  alu_field->src2);
 658                 print_immediate(imm);
 659         } else
 660                 print_scalar_src(alu_field->src2, reg_info->src2_reg);
 661
 662         midg_stats.instruction_count++;
 663         printf("\n");
 664 }
 665
 666 static void
 667 print_branch_op(unsigned op)
 668 {
 669         switch (op) {
 670         case midgard_jmp_writeout_op_branch_uncond:
 671                 printf("uncond.");
 672                 break;
 673
 674         case midgard_jmp_writeout_op_branch_cond:
 675                 printf("cond.");
 676                 break;
 677
 678         case midgard_jmp_writeout_op_writeout:
 679                 printf("write.");
 680                 break;
 681
 682         case midgard_jmp_writeout_op_tilebuffer_pending:
 683                 printf("tilebuffer.");
 684                 break;
 685
 686         case midgard_jmp_writeout_op_discard:
 687                 printf("discard.");
 688                 break;
 689
 690         default:
 691                 printf("unk%u.", op);
 692                 break;
 693         }
 694 }
 695
 696 static void
 697 print_branch_cond(int cond)
 698 {
 699         switch (cond) {
 700         case midgard_condition_write0:
 701                 printf("write0");
 702                 break;
 703
 704         case midgard_condition_false:
 705                 printf("false");
 706                 break;
 707
 708         case midgard_condition_true:
 709                 printf("true");
 710                 break;
 711
 712         case midgard_condition_always:
 713                 printf("always");
 714                 break;
 715
 716         default:
 717                 printf("unk%X", cond);
 718                 break;
 719         }
 720 }
 721
 722 static void
 723 print_compact_branch_writeout_field(uint16_t word)
 724 {
 725         midgard_jmp_writeout_op op = word & 0x7;
 726
 727         switch (op) {
 728         case midgard_jmp_writeout_op_branch_uncond: {
 729                 midgard_branch_uncond br_uncond;
 730                 memcpy((char *) &br_uncond, (char *) &word, sizeof(br_uncond));
 731                 printf("br.uncond ");
 732
 733                 if (br_uncond.unknown != 1)
 734                         printf("unknown:%u, ", br_uncond.unknown);
 735
 736                 if (br_uncond.offset >= 0)
 737                         printf("+");
 738
 739                 printf("%d -> ", br_uncond.offset);
 740                 print_tag_short(br_uncond.dest_tag);
 741                 printf("\n");
 742
 743                 break;
 744         }
 745
 746         case midgard_jmp_writeout_op_branch_cond:
 747         case midgard_jmp_writeout_op_writeout:
 748         case midgard_jmp_writeout_op_discard:
 749         default: {
 750                 midgard_branch_cond br_cond;
 751                 memcpy((char *) &br_cond, (char *) &word, sizeof(br_cond));
 752
 753                 printf("br.");
 754
 755                 print_branch_op(br_cond.op);
 756                 print_branch_cond(br_cond.cond);
 757
 758                 printf(" ");
 759
 760                 if (br_cond.offset >= 0)
 761                         printf("+");
 762
 763                 printf("%d -> ", br_cond.offset);
 764                 print_tag_short(br_cond.dest_tag);
 765                 printf("\n");
 766
 767                 break;
 768         }
 769         }
 770
 771         midg_stats.instruction_count++;
 772 }
 773
 774 static void
 775 print_extended_branch_writeout_field(uint8_t *words, unsigned next)
 776 {
 777         midgard_branch_extended br;
 778         memcpy((char *) &br, (char *) words, sizeof(br));
 779
 780         printf("brx.");
 781
 782         print_branch_op(br.op);
 783
 784         /* Condition codes are a LUT in the general case, but simply repeated 8 times for single-channel conditions.. Check this. */
 785
 786         bool single_channel = true;
 787
 788         for (unsigned i = 0; i < 16; i += 2) {
 789                 single_channel &= (((br.cond >> i) & 0x3) == (br.cond & 0x3));
 790         }
 791
 792         if (single_channel)
 793                 print_branch_cond(br.cond & 0x3);
 794         else
 795                 printf("lut%X", br.cond);
 796
 797         if (br.unknown)
 798                 printf(".unknown%u", br.unknown);
 799
 800         printf(" ");
 801
 802         if (br.offset >= 0)
 803                 printf("+");
 804
 805         printf("%d -> ", br.offset);
 806         print_tag_short(br.dest_tag);
 807         printf("\n");
 808
 809         unsigned I = next + br.offset * 4;
 810
 811         if (midg_tags[I] && midg_tags[I] != br.dest_tag) {
 812                 printf("\t/* XXX TAG ERROR: jumping to ");
 813                 print_tag_short(br.dest_tag);
 814                 printf(" but tagged ");
 815                 print_tag_short(midg_tags[I]);
 816                 printf(" */\n");
 817         }
 818
 819         midg_tags[I] = br.dest_tag;
 820
 821         midg_stats.instruction_count++;
 822 }
 823
 824 static unsigned
 825 num_alu_fields_enabled(uint32_t control_word)
 826 {
 827         unsigned ret = 0;
 828
 829         if ((control_word >> 17) & 1)
 830                 ret++;
 831
 832         if ((control_word >> 19) & 1)
 833                 ret++;
 834
 835         if ((control_word >> 21) & 1)
 836                 ret++;
 837
 838         if ((control_word >> 23) & 1)
 839                 ret++;
 840
 841         if ((control_word >> 25) & 1)
 842                 ret++;
 843
 844         return ret;
 845 }
 846
 847 static float
 848 float_bitcast(uint32_t integer)
 849 {
 850         union {
 851                 uint32_t i;
 852                 float f;
 853         } v;
 854
 855         v.i = integer;
 856         return v.f;
 857 }
 858
 859 static void
 860 print_alu_word(uint32_t *words, unsigned num_quad_words,
 861                unsigned tabs, unsigned next)
 862 {
 863         uint32_t control_word = words[0];
 864         uint16_t *beginning_ptr = (uint16_t *)(words + 1);
 865         unsigned num_fields = num_alu_fields_enabled(control_word);
 866         uint16_t *word_ptr = beginning_ptr + num_fields;
 867         unsigned num_words = 2 + num_fields;
 868
 869         if ((control_word >> 16) & 1)
 870                 printf("unknown bit 16 enabled\n");
 871
 872         if ((control_word >> 17) & 1) {
 873                 print_vector_field("vmul", word_ptr, *beginning_ptr, tabs);
 874                 beginning_ptr += 1;
 875                 word_ptr += 3;
 876                 num_words += 3;
 877         }
 878
 879         if ((control_word >> 18) & 1)
 880                 printf("unknown bit 18 enabled\n");
 881
 882         if ((control_word >> 19) & 1) {
 883                 print_scalar_field("sadd", word_ptr, *beginning_ptr, tabs);
 884                 beginning_ptr += 1;
 885                 word_ptr += 2;
 886                 num_words += 2;
 887         }
 888
 889         if ((control_word >> 20) & 1)
 890                 printf("unknown bit 20 enabled\n");
 891
 892         if ((control_word >> 21) & 1) {
 893                 print_vector_field("vadd", word_ptr, *beginning_ptr, tabs);
 894                 beginning_ptr += 1;
 895                 word_ptr += 3;
 896                 num_words += 3;
 897         }
 898
 899         if ((control_word >> 22) & 1)
 900                 printf("unknown bit 22 enabled\n");
 901
 902         if ((control_word >> 23) & 1) {
 903                 print_scalar_field("smul", word_ptr, *beginning_ptr, tabs);
 904                 beginning_ptr += 1;
 905                 word_ptr += 2;
 906                 num_words += 2;
 907         }
 908
 909         if ((control_word >> 24) & 1)
 910                 printf("unknown bit 24 enabled\n");
 911
 912         if ((control_word >> 25) & 1) {
 913                 print_vector_field("lut", word_ptr, *beginning_ptr, tabs);
 914                 word_ptr += 3;
 915                 num_words += 3;
 916         }
 917
 918         if ((control_word >> 26) & 1) {
 919                 print_compact_branch_writeout_field(*word_ptr);
 920                 word_ptr += 1;
 921                 num_words += 1;
 922         }
 923
 924         if ((control_word >> 27) & 1) {
 925                 print_extended_branch_writeout_field((uint8_t *) word_ptr, next);
 926                 word_ptr += 3;
 927                 num_words += 3;
 928         }
 929
 930         if (num_quad_words > (num_words + 7) / 8) {
 931                 assert(num_quad_words == (num_words + 15) / 8);
 932                 //Assume that the extra quadword is constants
 933                 void *consts = words + (4 * num_quad_words - 4);
 934
 935                 if (is_embedded_constant_int) {
 936                         if (is_embedded_constant_half) {
 937                                 int16_t *sconsts = (int16_t *) consts;
 938                                 printf("sconstants %d, %d, %d, %d\n",
 939                                        sconsts[0],
 940                                        sconsts[1],
 941                                        sconsts[2],
 942                                        sconsts[3]);
 943                         } else {
 944                                 uint32_t *iconsts = (uint32_t *) consts;
 945                                 printf("iconstants 0x%X, 0x%X, 0x%X, 0x%X\n",
 946                                        iconsts[0],
 947                                        iconsts[1],
 948                                        iconsts[2],
 949                                        iconsts[3]);
 950                         }
 951                 } else {
 952                         if (is_embedded_constant_half) {
 953                                 uint16_t *hconsts = (uint16_t *) consts;
 954                                 printf("hconstants %g, %g, %g, %g\n",
 955                                        _mesa_half_to_float(hconsts[0]),
 956                                        _mesa_half_to_float(hconsts[1]),
 957                                        _mesa_half_to_float(hconsts[2]),
 958                                        _mesa_half_to_float(hconsts[3]));
 959                         } else {
 960                                 uint32_t *fconsts = (uint32_t *) consts;
 961                                 printf("fconstants %g, %g, %g, %g\n",
 962                                        float_bitcast(fconsts[0]),
 963                                        float_bitcast(fconsts[1]),
 964                                        float_bitcast(fconsts[2]),
 965                                        float_bitcast(fconsts[3]));
 966                         }
 967
 968                 }
 969         }
 970 }
 971
 972 static void
 973 print_varying_parameters(midgard_load_store_word *word)
 974 {
 975         midgard_varying_parameter param;
 976         unsigned v = word->varying_parameters;
 977         memcpy(&param, &v, sizeof(param));
 978
 979         if (param.is_varying) {
 980                 /* If a varying, there are qualifiers */
 981                 if (param.flat)
 982                         printf(".flat");
 983
 984                 if (param.interpolation != midgard_interp_default) {
 985                         if (param.interpolation == midgard_interp_centroid)
 986                                 printf(".centroid");
 987                         else
 988                                 printf(".interp%d", param.interpolation);
 989                 }
 990
 991                 if (param.modifier != midgard_varying_mod_none) {
 992                         if (param.modifier == midgard_varying_mod_perspective_w)
 993                                 printf(".perspectivew");
 994                         else if (param.modifier == midgard_varying_mod_perspective_z)
 995                                 printf(".perspectivez");
 996                         else
 997                                 printf(".mod%d", param.modifier);
 998                 }
 999         } else if (param.flat || param.interpolation || param.modifier) {
1000                 printf(" /* is_varying not set but varying metadata attached */");
1001         }
1002
1003         if (param.zero0 || param.zero1 || param.zero2)
1004                 printf(" /* zero tripped, %u %u %u */ ", param.zero0, param.zero1, param.zero2);
1005 }
1006
1007 static bool
1008 is_op_varying(unsigned op)
1009 {
1010         switch (op) {
1011         case midgard_op_st_vary_16:
1012         case midgard_op_st_vary_32:
1013         case midgard_op_st_vary_32i:
1014         case midgard_op_st_vary_32u:
1015         case midgard_op_ld_vary_16:
1016         case midgard_op_ld_vary_32:
1017         case midgard_op_ld_vary_32i:
1018         case midgard_op_ld_vary_32u:
1019                 return true;
1020         }
1021
1022         return false;
1023 }
1024
1025 static bool
1026 is_op_attribute(unsigned op)
1027 {
1028         switch (op) {
1029         case midgard_op_ld_attr_16:
1030         case midgard_op_ld_attr_32:
1031         case midgard_op_ld_attr_32i:
1032         case midgard_op_ld_attr_32u:
1033                 return true;
1034         }
1035
1036         return false;
1037 }
1038
1039 static void
1040 print_load_store_arg(uint8_t arg, unsigned index)
1041 {
1042         /* Try to interpret as a register */
1043         midgard_ldst_register_select sel;
1044         memcpy(&sel, &arg, sizeof(arg));
1045
1046         /* If unknown is set, we're not sure what this is or how to
1047          * interpret it. But if it's zero, we get it. */
1048
1049         if (sel.unknown) {
1050                 printf("0x%02X", arg);
1051                 return;
1052         }
1053
1054         unsigned reg = REGISTER_LDST_BASE + sel.select;
1055         char comp = components[sel.component];
1056
1057         printf("r%u.%c", reg, comp);
1058
1059         /* Only print a shift if it's non-zero. Shifts only make sense for the
1060          * second index. For the first, we're not sure what it means yet */
1061
1062         if (index == 1) {
1063                 if (sel.shift)
1064                         printf(" << %u", sel.shift);
1065         } else {
1066                 printf(" /* %X */", sel.shift);
1067         }
1068 }
1069
1070 static void
1071 update_stats(signed *stat, unsigned address)
1072 {
1073         if (*stat >= 0)
1074                 *stat = MAX2(*stat, address + 1);
1075 }
1076
1077 static void
1078 print_load_store_instr(uint64_t data,
1079                        unsigned tabs)
1080 {
1081         midgard_load_store_word *word = (midgard_load_store_word *) &data;
1082
1083         print_ld_st_opcode(word->op);
1084
1085         unsigned address = word->address;
1086
1087         if (is_op_varying(word->op)) {
1088                 print_varying_parameters(word);
1089
1090                 /* Do some analysis: check if direct cacess */
1091
1092                 if ((word->arg_2 == 0x1E) && midg_stats.varying_count >= 0)
1093                         update_stats(&midg_stats.varying_count, address);
1094                 else
1095                         midg_stats.varying_count = -16;
1096         } else if (is_op_attribute(word->op)) {
1097                 if ((word->arg_2 == 0x1E) && midg_stats.attribute_count >= 0)
1098                         update_stats(&midg_stats.attribute_count, address);
1099                 else
1100                         midg_stats.attribute_count = -16;
1101         }
1102
1103         printf(" r%u", word->reg);
1104         print_mask_4(word->mask);
1105
1106         if (!OP_IS_STORE(word->op))
1107                 update_dest(word->reg);
1108
1109         bool is_ubo = OP_IS_UBO_READ(word->op);
1110
1111         if (is_ubo) {
1112                 /* UBOs use their own addressing scheme */
1113
1114                 int lo = word->varying_parameters >> 7;
1115                 int hi = word->address;
1116
1117                 /* TODO: Combine fields logically */
1118                 address = (hi << 3) | lo;
1119         }
1120
1121         printf(", %u", address);
1122
1123         print_swizzle_vec4(word->swizzle, false, false);
1124
1125         printf(", ");
1126
1127         if (is_ubo) {
1128                 printf("ubo%u", word->arg_1);
1129                 update_stats(&midg_stats.uniform_buffer_count, word->arg_1);
1130         } else
1131                 print_load_store_arg(word->arg_1, 0);
1132
1133         printf(", ");
1134         print_load_store_arg(word->arg_2, 1);
1135         printf(" /* %X */\n", word->varying_parameters);
1136
1137         midg_stats.instruction_count++;
1138 }
1139
1140 static void
1141 print_load_store_word(uint32_t *word, unsigned tabs)
1142 {
1143         midgard_load_store *load_store = (midgard_load_store *) word;
1144
1145         if (load_store->word1 != 3) {
1146                 print_load_store_instr(load_store->word1, tabs);
1147         }
1148
1149         if (load_store->word2 != 3) {
1150                 print_load_store_instr(load_store->word2, tabs);
1151         }
1152 }
1153
1154 static void
1155 print_texture_reg(bool full, bool select, bool upper)
1156 {
1157         if (full)
1158                 printf("r%d", REG_TEX_BASE + select);
1159         else
1160                 printf("hr%d", (REG_TEX_BASE + select) * 2 + upper);
1161
1162         if (full && upper)
1163                 printf("// error: out full / upper mutually exclusive\n");
1164
1165 }
1166
1167 static void
1168 print_texture_reg_triple(unsigned triple)
1169 {
1170         bool full = triple & 1;
1171         bool select = triple & 2;
1172         bool upper = triple & 4;
1173
1174         print_texture_reg(full, select, upper);
1175 }
1176
1177 static void
1178 print_texture_reg_select(uint8_t u)
1179 {
1180         midgard_tex_register_select sel;
1181         memcpy(&sel, &u, sizeof(u));
1182
1183         if (!sel.full)
1184                 printf("h");
1185
1186         printf("r%u", REG_TEX_BASE + sel.select);
1187
1188         unsigned component = sel.component;
1189
1190         /* Use the upper half in half-reg mode */
1191         if (sel.upper) {
1192                 assert(!sel.full);
1193                 component += 4;
1194         }
1195
1196         printf(".%c", components[component]);
1197
1198         assert(sel.zero == 0);
1199 }
1200
1201 static void
1202 print_texture_format(int format)
1203 {
1204         /* Act like a modifier */
1205         printf(".");
1206
1207         switch (format) {
1208                 DEFINE_CASE(MALI_TEX_1D, "1d");
1209                 DEFINE_CASE(MALI_TEX_2D, "2d");
1210                 DEFINE_CASE(MALI_TEX_3D, "3d");
1211                 DEFINE_CASE(MALI_TEX_CUBE, "cube");
1212
1213         default:
1214                 unreachable("Bad format");
1215         }
1216 }
1217
1218 static bool
1219 midgard_op_has_helpers(unsigned op, bool gather)
1220 {
1221         if (gather)
1222                 return true;
1223
1224         switch (op) {
1225         case TEXTURE_OP_NORMAL:
1226         case TEXTURE_OP_DFDX:
1227         case TEXTURE_OP_DFDY:
1228                 return true;
1229         default:
1230                 return false;
1231         }
1232 }
1233
1234 static void
1235 print_texture_op(unsigned op, bool gather)
1236 {
1237         /* Act like a bare name, like ESSL functions */
1238
1239         if (gather) {
1240                 printf("textureGather");
1241
1242                 unsigned component = op >> 4;
1243                 unsigned bottom = op & 0xF;
1244
1245                 if (bottom != 0x2)
1246                         printf("_unk%u", bottom);
1247
1248                 printf(".%c", components[component]);
1249                 return;
1250         }
1251
1252         switch (op) {
1253                 DEFINE_CASE(TEXTURE_OP_NORMAL, "texture");
1254                 DEFINE_CASE(TEXTURE_OP_LOD, "textureLod");
1255                 DEFINE_CASE(TEXTURE_OP_TEXEL_FETCH, "texelFetch");
1256                 DEFINE_CASE(TEXTURE_OP_DFDX, "dFdx");
1257                 DEFINE_CASE(TEXTURE_OP_DFDY, "dFdy");
1258
1259         default:
1260                 printf("tex_%X", op);
1261                 break;
1262         }
1263 }
1264
1265 static bool
1266 texture_op_takes_bias(unsigned op)
1267 {
1268         return op == TEXTURE_OP_NORMAL;
1269 }
1270
1271 static char
1272 sampler_type_name(enum mali_sampler_type t)
1273 {
1274         switch (t) {
1275         case MALI_SAMPLER_FLOAT:
1276                 return 'f';
1277         case MALI_SAMPLER_UNSIGNED:
1278                 return 'u';
1279         case MALI_SAMPLER_SIGNED:
1280                 return 'i';
1281         default:
1282                 return '?';
1283         }
1284
1285 }
1286
1287 #undef DEFINE_CASE
1288
1289 static void
1290 print_texture_word(uint32_t *word, unsigned tabs)
1291 {
1292         midgard_texture_word *texture = (midgard_texture_word *) word;
1293
1294         midg_stats.helper_invocations |=
1295                 midgard_op_has_helpers(texture->op, texture->is_gather);
1296
1297         /* Broad category of texture operation in question */
1298         print_texture_op(texture->op, texture->is_gather);
1299
1300         /* Specific format in question */
1301         print_texture_format(texture->format);
1302
1303         /* Instruction "modifiers" parallel the ALU instructions. */
1304
1305         if (texture->shadow)
1306                 printf(".shadow");
1307
1308         if (texture->cont)
1309                 printf(".cont");
1310
1311         if (texture->last)
1312                 printf(".last");
1313
1314         /* Output modifiers are always interpreted floatly */
1315         print_outmod(texture->outmod, false);
1316
1317         printf(" ");
1318
1319         print_texture_reg(texture->out_full, texture->out_reg_select, texture->out_upper);
1320         print_mask_4(texture->mask);
1321         printf(", ");
1322
1323         /* Depending on whether we read from textures directly or indirectly,
1324          * we may be able to update our analysis */
1325
1326         if (texture->texture_register) {
1327                 printf("texture[");
1328                 print_texture_reg_select(texture->texture_handle);
1329                 printf("], ");
1330
1331                 /* Indirect, tut tut */
1332                 midg_stats.texture_count = -16;
1333         } else {
1334                 printf("texture%u, ", texture->texture_handle);
1335                 update_stats(&midg_stats.texture_count, texture->texture_handle);
1336         }
1337
1338         /* Print the type, GL style */
1339         printf("%csampler", sampler_type_name(texture->sampler_type));
1340
1341         if (texture->sampler_register) {
1342                 printf("[");
1343                 print_texture_reg_select(texture->sampler_handle);
1344                 printf("]");
1345
1346                 midg_stats.sampler_count = -16;
1347         } else {
1348                 printf("%u", texture->sampler_handle);
1349                 update_stats(&midg_stats.sampler_count, texture->sampler_handle);
1350         }
1351
1352         print_swizzle_vec4(texture->swizzle, false, false);
1353         printf(", ");
1354
1355         print_texture_reg(texture->in_reg_full, texture->in_reg_select, texture->in_reg_upper);
1356         print_swizzle_vec4(texture->in_reg_swizzle, false, false);
1357
1358         /* There is *always* an offset attached. Of
1359          * course, that offset is just immediate #0 for a
1360          * GLES call that doesn't take an offset. If there
1361          * is a non-negative non-zero offset, this is
1362          * specified in immediate offset mode, with the
1363          * values in the offset_* fields as immediates. If
1364          * this is a negative offset, we instead switch to
1365          * a register offset mode, where the offset_*
1366          * fields become register triplets */
1367
1368         if (texture->offset_register) {
1369                 printf(" + ");
1370                 print_texture_reg_triple(texture->offset_x);
1371
1372                 /* The less questions you ask, the better. */
1373
1374                 unsigned swizzle_lo, swizzle_hi;
1375                 unsigned orig_y = texture->offset_y;
1376                 unsigned orig_z = texture->offset_z;
1377
1378                 memcpy(&swizzle_lo, &orig_y, sizeof(unsigned));
1379                 memcpy(&swizzle_hi, &orig_z, sizeof(unsigned));
1380
1381                 /* Duplicate hi swizzle over */
1382                 assert(swizzle_hi < 4);
1383                 swizzle_hi = (swizzle_hi << 2) | swizzle_hi;
1384
1385                 unsigned swiz = (swizzle_lo << 4) | swizzle_hi;
1386                 unsigned reversed = util_bitreverse(swiz) >> 24;
1387                 print_swizzle_vec4(reversed, false, false);
1388
1389                 printf(", ");
1390         } else if (texture->offset_x || texture->offset_y || texture->offset_z) {
1391                 /* Only select ops allow negative immediate offsets, verify */
1392
1393                 bool neg_x = texture->offset_x < 0;
1394                 bool neg_y = texture->offset_y < 0;
1395                 bool neg_z = texture->offset_z < 0;
1396                 bool any_neg = neg_x || neg_y || neg_z;
1397
1398                 if (any_neg && texture->op != TEXTURE_OP_TEXEL_FETCH)
1399                         printf("/* invalid negative */ ");
1400
1401                 /* Regardless, just print the immediate offset */
1402
1403                 printf(" + <%d, %d, %d>, ",
1404                        texture->offset_x,
1405                        texture->offset_y,
1406                        texture->offset_z);
1407         } else {
1408                 printf(", ");
1409         }
1410
1411         char lod_operand = texture_op_takes_bias(texture->op) ? '+' : '=';
1412
1413         if (texture->lod_register) {
1414                 printf("lod %c ", lod_operand);
1415                 print_texture_reg_select(texture->bias);
1416                 printf(", ");
1417
1418                 if (texture->bias_int)
1419                         printf(" /* bias_int = 0x%X */", texture->bias_int);
1420         } else if (texture->op == TEXTURE_OP_TEXEL_FETCH) {
1421                 /* For texel fetch, the int LOD is in the fractional place and
1422                  * there is no fraction / possibility of bias. We *always* have
1423                  * an explicit LOD, even if it's zero. */
1424
1425                 if (texture->bias_int)
1426                         printf(" /* bias_int = 0x%X */ ", texture->bias_int);
1427
1428                 printf("lod = %u, ", texture->bias);
1429         } else if (texture->bias || texture->bias_int) {
1430                 signed bias_int = texture->bias_int;
1431                 float bias_frac = texture->bias / 256.0f;
1432                 float bias = bias_int + bias_frac;
1433
1434                 bool is_bias = texture_op_takes_bias(texture->op);
1435                 char sign = (bias >= 0.0) ? '+' : '-';
1436                 char operand = is_bias ? sign : '=';
1437
1438                 printf("lod %c %f, ", operand, fabsf(bias));
1439         }
1440
1441         printf("\n");
1442
1443         /* While not zero in general, for these simple instructions the
1444          * following unknowns are zero, so we don't include them */
1445
1446         if (texture->unknown4 ||
1447             texture->unknownA ||
1448             texture->unknown8) {
1449                 printf("// unknown4 = 0x%x\n", texture->unknown4);
1450                 printf("// unknownA = 0x%x\n", texture->unknownA);
1451                 printf("// unknown8 = 0x%x\n", texture->unknown8);
1452         }
1453
1454         midg_stats.instruction_count++;
1455 }
1456
1457 struct midgard_disasm_stats
1458 disassemble_midgard(uint8_t *code, size_t size, unsigned gpu_id)
1459 {
1460         uint32_t *words = (uint32_t *) code;
1461         unsigned num_words = size / 4;
1462         int tabs = 0;
1463
1464         bool prefetch_flag = false;
1465
1466         int last_next_tag = -1;
1467
1468         unsigned i = 0;
1469
1470         midg_tags = calloc(sizeof(midg_tags[0]), num_words);
1471
1472         /* Stats for shader-db */
1473         memset(&midg_stats, 0, sizeof(midg_stats));
1474         midg_ever_written = 0;
1475
1476         while (i < num_words) {
1477                 unsigned tag = words[i] & 0xF;
1478                 unsigned next_tag = (words[i] >> 4) & 0xF;
1479                 unsigned num_quad_words = midgard_word_size[tag];
1480
1481                 if (midg_tags[i] && midg_tags[i] != tag) {
1482                         printf("\t/* XXX: TAG ERROR branch, got ");
1483                         print_tag_short(tag);
1484                         printf(" expected ");
1485                         print_tag_short(midg_tags[i]);
1486                         printf(" */\n");
1487                 }
1488
1489                 midg_tags[i] = tag;
1490
1491                 /* Check the tag */
1492                 if (last_next_tag > 1) {
1493                         if (last_next_tag != tag) {
1494                                 printf("\t/* XXX: TAG ERROR sequence, got ");
1495                                 print_tag_short(tag);
1496                                 printf(" expected ");
1497                                 print_tag_short(last_next_tag);
1498                                 printf(" */\n");
1499                         }
1500                 } else {
1501                         /* TODO: Check ALU case */
1502                 }
1503
1504                 last_next_tag = next_tag;
1505
1506                 switch (midgard_word_types[tag]) {
1507                 case midgard_word_type_texture:
1508                         print_texture_word(&words[i], tabs);
1509                         break;
1510
1511                 case midgard_word_type_load_store:
1512                         print_load_store_word(&words[i], tabs);
1513                         break;
1514
1515                 case midgard_word_type_alu:
1516                         print_alu_word(&words[i], num_quad_words, tabs, i + 4*num_quad_words);
1517
1518                         /* Reset word static analysis state */
1519                         is_embedded_constant_half = false;
1520                         is_embedded_constant_int = false;
1521
1522                         break;
1523
1524                 default:
1525                         printf("Unknown word type %u:\n", words[i] & 0xF);
1526                         num_quad_words = 1;
1527                         print_quad_word(&words[i], tabs);
1528                         printf("\n");
1529                         break;
1530                 }
1531
1532                 if (prefetch_flag && midgard_word_types[tag] == midgard_word_type_alu)
1533                         break;
1534
1535                 printf("\n");
1536
1537                 unsigned next = (words[i] & 0xF0) >> 4;
1538
1539                 /* We are parsing per bundle anyway */
1540                 midg_stats.bundle_count++;
1541                 midg_stats.quadword_count += num_quad_words;
1542
1543                 /* Break based on instruction prefetch flag */
1544
1545                 if (i < num_words && next == 1) {
1546                         prefetch_flag = true;
1547
1548                         if (midgard_word_types[words[i] & 0xF] != midgard_word_type_alu)
1549                                 break;
1550                 }
1551
1552                 i += 4 * num_quad_words;
1553         }
1554
1555         /* We computed work_count as max_work_registers, so add one to get the
1556          * count. If no work registers are written, you still have one work
1557          * reported, which is exactly what the hardware expects */
1558
1559         midg_stats.work_count++;
1560
1561         return midg_stats;
1562 }