src/gallium/drivers/vc4/vc4_qir.c

   1 /*
   2  * Copyright © 2014 Broadcom
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "util/u_memory.h"
  25 #include "util/ralloc.h"
  26
  27 #include "vc4_qir.h"
  28 #include "vc4_qpu.h"
  29
  30 struct qir_op_info {
  31         const char *name;
  32         uint8_t ndst, nsrc;
  33         bool has_side_effects;
  34 };
  35
  36 static const struct qir_op_info qir_op_info[] = {
  37         [QOP_MOV] = { "mov", 1, 1 },
  38         [QOP_FMOV] = { "fmov", 1, 1 },
  39         [QOP_MMOV] = { "mmov", 1, 1 },
  40         [QOP_FADD] = { "fadd", 1, 2 },
  41         [QOP_FSUB] = { "fsub", 1, 2 },
  42         [QOP_FMUL] = { "fmul", 1, 2 },
  43         [QOP_MUL24] = { "mul24", 1, 2 },
  44         [QOP_V8MULD] = {"v8muld", 1, 2 },
  45         [QOP_V8MIN] = {"v8min", 1, 2 },
  46         [QOP_V8MAX] = {"v8max", 1, 2 },
  47         [QOP_V8ADDS] = {"v8adds", 1, 2 },
  48         [QOP_V8SUBS] = {"v8subs", 1, 2 },
  49         [QOP_FMIN] = { "fmin", 1, 2 },
  50         [QOP_FMAX] = { "fmax", 1, 2 },
  51         [QOP_FMINABS] = { "fminabs", 1, 2 },
  52         [QOP_FMAXABS] = { "fmaxabs", 1, 2 },
  53         [QOP_FTOI] = { "ftoi", 1, 1 },
  54         [QOP_ITOF] = { "itof", 1, 1 },
  55         [QOP_ADD] = { "add", 1, 2 },
  56         [QOP_SUB] = { "sub", 1, 2 },
  57         [QOP_SHR] = { "shr", 1, 2 },
  58         [QOP_ASR] = { "asr", 1, 2 },
  59         [QOP_SHL] = { "shl", 1, 2 },
  60         [QOP_MIN] = { "min", 1, 2 },
  61         [QOP_MAX] = { "max", 1, 2 },
  62         [QOP_AND] = { "and", 1, 2 },
  63         [QOP_OR] = { "or", 1, 2 },
  64         [QOP_XOR] = { "xor", 1, 2 },
  65         [QOP_NOT] = { "not", 1, 1 },
  66
  67         [QOP_RCP] = { "rcp", 1, 1 },
  68         [QOP_RSQ] = { "rsq", 1, 1 },
  69         [QOP_EXP2] = { "exp2", 1, 1 },
  70         [QOP_LOG2] = { "log2", 1, 1 },
  71         [QOP_TLB_COLOR_READ] = { "tlb_color_read", 1, 0 },
  72         [QOP_MS_MASK] = { "ms_mask", 0, 1, true },
  73         [QOP_VARY_ADD_C] = { "vary_add_c", 1, 1 },
  74
  75         [QOP_FRAG_Z] = { "frag_z", 1, 0 },
  76         [QOP_FRAG_W] = { "frag_w", 1, 0 },
  77
  78         [QOP_TEX_S] = { "tex_s", 0, 2, true },
  79         [QOP_TEX_T] = { "tex_t", 0, 2, true },
  80         [QOP_TEX_R] = { "tex_r", 0, 2, true },
  81         [QOP_TEX_B] = { "tex_b", 0, 2, true },
  82         [QOP_TEX_DIRECT] = { "tex_direct", 0, 2, true },
  83         [QOP_TEX_RESULT] = { "tex_result", 1, 0, true },
  84
  85         [QOP_THRSW] = { "thrsw", 0, 0, true },
  86
  87         [QOP_LOAD_IMM] = { "load_imm", 0, 1 },
  88         [QOP_LOAD_IMM_U2] = { "load_imm_u2", 0, 1 },
  89         [QOP_LOAD_IMM_I2] = { "load_imm_i2", 0, 1 },
  90
  91         [QOP_ROT_MUL] = { "rot_mul", 0, 2 },
  92
  93         [QOP_BRANCH] = { "branch", 0, 0, true },
  94         [QOP_UNIFORMS_RESET] = { "uniforms_reset", 0, 2, true },
  95 };
  96
  97 static const char *
  98 qir_get_op_name(enum qop qop)
  99 {
 100         if (qop < ARRAY_SIZE(qir_op_info) && qir_op_info[qop].name)
 101                 return qir_op_info[qop].name;
 102         else
 103                 return "???";
 104 }
 105
 106 int
 107 qir_get_op_nsrc(enum qop qop)
 108 {
 109         if (qop < ARRAY_SIZE(qir_op_info) && qir_op_info[qop].name)
 110                 return qir_op_info[qop].nsrc;
 111         else
 112                 abort();
 113 }
 114
 115 /**
 116  * Returns whether the instruction has any side effects that must be
 117  * preserved.
 118  */
 119 bool
 120 qir_has_side_effects(struct vc4_compile *c, struct qinst *inst)
 121 {
 122         switch (inst->dst.file) {
 123         case QFILE_TLB_Z_WRITE:
 124         case QFILE_TLB_COLOR_WRITE:
 125         case QFILE_TLB_COLOR_WRITE_MS:
 126         case QFILE_TLB_STENCIL_SETUP:
 127                 return true;
 128         default:
 129                 break;
 130         }
 131
 132         return qir_op_info[inst->op].has_side_effects;
 133 }
 134
 135 bool
 136 qir_has_side_effect_reads(struct vc4_compile *c, struct qinst *inst)
 137 {
 138         /* We can dead-code eliminate varyings, because we only tell the VS
 139          * about the live ones at the end.  But we have to preserve the
 140          * point/line coordinates reads, because they're generated by
 141          * fixed-function hardware.
 142          */
 143         for (int i = 0; i < qir_get_op_nsrc(inst->op); i++) {
 144                 if (inst->src[i].file == QFILE_VARY &&
 145                     c->input_slots[inst->src[i].index].slot == 0xff) {
 146                         return true;
 147                 }
 148
 149                 if (inst->src[i].file == QFILE_VPM)
 150                         return true;
 151         }
 152
 153         if (inst->dst.file == QFILE_VPM)
 154                 return true;
 155
 156         return false;
 157 }
 158
 159 bool
 160 qir_is_mul(struct qinst *inst)
 161 {
 162         switch (inst->op) {
 163         case QOP_MMOV:
 164         case QOP_FMUL:
 165         case QOP_MUL24:
 166         case QOP_V8MULD:
 167         case QOP_V8MIN:
 168         case QOP_V8MAX:
 169         case QOP_V8ADDS:
 170         case QOP_V8SUBS:
 171         case QOP_ROT_MUL:
 172                 return true;
 173         default:
 174                 return false;
 175         }
 176 }
 177
 178 bool
 179 qir_is_float_input(struct qinst *inst)
 180 {
 181         switch (inst->op) {
 182         case QOP_FMOV:
 183         case QOP_FMUL:
 184         case QOP_FADD:
 185         case QOP_FSUB:
 186         case QOP_FMIN:
 187         case QOP_FMAX:
 188         case QOP_FMINABS:
 189         case QOP_FMAXABS:
 190         case QOP_FTOI:
 191                 return true;
 192         default:
 193                 return false;
 194         }
 195 }
 196
 197 bool
 198 qir_is_raw_mov(struct qinst *inst)
 199 {
 200         return ((inst->op == QOP_MOV ||
 201                  inst->op == QOP_FMOV ||
 202                  inst->op == QOP_MMOV) &&
 203                 inst->cond == QPU_COND_ALWAYS &&
 204                 !inst->dst.pack &&
 205                 !inst->src[0].pack);
 206 }
 207
 208 bool
 209 qir_is_tex(struct qinst *inst)
 210 {
 211         return inst->op >= QOP_TEX_S && inst->op <= QOP_TEX_DIRECT;
 212 }
 213
 214 bool
 215 qir_depends_on_flags(struct qinst *inst)
 216 {
 217         if (inst->op == QOP_BRANCH) {
 218                 return inst->cond != QPU_COND_BRANCH_ALWAYS;
 219         } else {
 220                 return (inst->cond != QPU_COND_ALWAYS &&
 221                         inst->cond != QPU_COND_NEVER);
 222         }
 223 }
 224
 225 bool
 226 qir_writes_r4(struct qinst *inst)
 227 {
 228         switch (inst->op) {
 229         case QOP_TEX_RESULT:
 230         case QOP_TLB_COLOR_READ:
 231         case QOP_RCP:
 232         case QOP_RSQ:
 233         case QOP_EXP2:
 234         case QOP_LOG2:
 235                 return true;
 236         default:
 237                 return false;
 238         }
 239 }
 240
 241 uint8_t
 242 qir_channels_written(struct qinst *inst)
 243 {
 244         if (qir_is_mul(inst)) {
 245                 switch (inst->dst.pack) {
 246                 case QPU_PACK_MUL_NOP:
 247                 case QPU_PACK_MUL_8888:
 248                         return 0xf;
 249                 case QPU_PACK_MUL_8A:
 250                         return 0x1;
 251                 case QPU_PACK_MUL_8B:
 252                         return 0x2;
 253                 case QPU_PACK_MUL_8C:
 254                         return 0x4;
 255                 case QPU_PACK_MUL_8D:
 256                         return 0x8;
 257                 }
 258         } else {
 259                 switch (inst->dst.pack) {
 260                 case QPU_PACK_A_NOP:
 261                 case QPU_PACK_A_8888:
 262                 case QPU_PACK_A_8888_SAT:
 263                 case QPU_PACK_A_32_SAT:
 264                         return 0xf;
 265                 case QPU_PACK_A_8A:
 266                 case QPU_PACK_A_8A_SAT:
 267                         return 0x1;
 268                 case QPU_PACK_A_8B:
 269                 case QPU_PACK_A_8B_SAT:
 270                         return 0x2;
 271                 case QPU_PACK_A_8C:
 272                 case QPU_PACK_A_8C_SAT:
 273                         return 0x4;
 274                 case QPU_PACK_A_8D:
 275                 case QPU_PACK_A_8D_SAT:
 276                         return 0x8;
 277                 case QPU_PACK_A_16A:
 278                 case QPU_PACK_A_16A_SAT:
 279                         return 0x3;
 280                 case QPU_PACK_A_16B:
 281                 case QPU_PACK_A_16B_SAT:
 282                         return 0xc;
 283                 }
 284         }
 285         unreachable("Bad pack field");
 286 }
 287
 288 static void
 289 qir_print_reg(struct vc4_compile *c, struct qreg reg, bool write)
 290 {
 291         static const char *files[] = {
 292                 [QFILE_TEMP] = "t",
 293                 [QFILE_VARY] = "v",
 294                 [QFILE_UNIF] = "u",
 295                 [QFILE_TLB_COLOR_WRITE] = "tlb_c",
 296                 [QFILE_TLB_COLOR_WRITE_MS] = "tlb_c_ms",
 297                 [QFILE_TLB_Z_WRITE] = "tlb_z",
 298                 [QFILE_TLB_STENCIL_SETUP] = "tlb_stencil",
 299                 [QFILE_FRAG_X] = "frag_x",
 300                 [QFILE_FRAG_Y] = "frag_y",
 301                 [QFILE_FRAG_REV_FLAG] = "frag_rev_flag",
 302                 [QFILE_QPU_ELEMENT] = "elem",
 303         };
 304
 305         switch (reg.file) {
 306
 307         case QFILE_NULL:
 308                 fprintf(stderr, "null");
 309                 break;
 310
 311         case QFILE_LOAD_IMM:
 312                 fprintf(stderr, "0x%08x (%f)", reg.index, uif(reg.index));
 313                 break;
 314
 315         case QFILE_SMALL_IMM:
 316                 if ((int)reg.index >= -16 && (int)reg.index <= 15)
 317                         fprintf(stderr, "%d", reg.index);
 318                 else
 319                         fprintf(stderr, "%f", uif(reg.index));
 320                 break;
 321
 322         case QFILE_VPM:
 323                 if (write) {
 324                         fprintf(stderr, "vpm");
 325                 } else {
 326                         fprintf(stderr, "vpm%d.%d",
 327                                 reg.index / 4, reg.index % 4);
 328                 }
 329                 break;
 330
 331         case QFILE_TLB_COLOR_WRITE:
 332         case QFILE_TLB_COLOR_WRITE_MS:
 333         case QFILE_TLB_Z_WRITE:
 334         case QFILE_TLB_STENCIL_SETUP:
 335                 fprintf(stderr, "%s", files[reg.file]);
 336                 break;
 337
 338         default:
 339                 fprintf(stderr, "%s%d", files[reg.file], reg.index);
 340                 break;
 341         }
 342
 343         if (reg.file == QFILE_UNIF &&
 344             c->uniform_contents[reg.index] == QUNIFORM_CONSTANT) {
 345                 fprintf(stderr, " (0x%08x / %f)",
 346                         c->uniform_data[reg.index],
 347                         uif(c->uniform_data[reg.index]));
 348         }
 349 }
 350
 351 void
 352 qir_dump_inst(struct vc4_compile *c, struct qinst *inst)
 353 {
 354         fprintf(stderr, "%s", qir_get_op_name(inst->op));
 355         if (inst->op == QOP_BRANCH)
 356                 vc4_qpu_disasm_cond_branch(stderr, inst->cond);
 357         else
 358                 vc4_qpu_disasm_cond(stderr, inst->cond);
 359         if (inst->sf)
 360                 fprintf(stderr, ".sf");
 361         fprintf(stderr, " ");
 362
 363         if (inst->op != QOP_BRANCH) {
 364                 qir_print_reg(c, inst->dst, true);
 365                 if (inst->dst.pack) {
 366                         if (inst->dst.pack) {
 367                                 if (qir_is_mul(inst))
 368                                         vc4_qpu_disasm_pack_mul(stderr, inst->dst.pack);
 369                                 else
 370                                         vc4_qpu_disasm_pack_a(stderr, inst->dst.pack);
 371                         }
 372                 }
 373         }
 374
 375         for (int i = 0; i < qir_get_op_nsrc(inst->op); i++) {
 376                 fprintf(stderr, ", ");
 377                 qir_print_reg(c, inst->src[i], false);
 378                 vc4_qpu_disasm_unpack(stderr, inst->src[i].pack);
 379         }
 380 }
 381
 382 void
 383 qir_dump(struct vc4_compile *c)
 384 {
 385         int ip = 0;
 386         int pressure = 0;
 387
 388         qir_for_each_block(block, c) {
 389                 fprintf(stderr, "BLOCK %d:\n", block->index);
 390                 qir_for_each_inst(inst, block) {
 391                         if (c->temp_start) {
 392                                 bool first = true;
 393
 394                                 fprintf(stderr, "%3d ", pressure);
 395
 396                                 for (int i = 0; i < c->num_temps; i++) {
 397                                         if (c->temp_start[i] != ip)
 398                                                 continue;
 399
 400                                         if (first) {
 401                                                 first = false;
 402                                         } else {
 403                                                 fprintf(stderr, ", ");
 404                                         }
 405                                         fprintf(stderr, "S%4d", i);
 406                                         pressure++;
 407                                 }
 408
 409                                 if (first)
 410                                         fprintf(stderr, "      ");
 411                                 else
 412                                         fprintf(stderr, " ");
 413                         }
 414
 415                         if (c->temp_end) {
 416                                 bool first = true;
 417
 418                                 for (int i = 0; i < c->num_temps; i++) {
 419                                         if (c->temp_end[i] != ip)
 420                                                 continue;
 421
 422                                         if (first) {
 423                                                 first = false;
 424                                         } else {
 425                                                 fprintf(stderr, ", ");
 426                                         }
 427                                         fprintf(stderr, "E%4d", i);
 428                                         pressure--;
 429                                 }
 430
 431                                 if (first)
 432                                         fprintf(stderr, "      ");
 433                                 else
 434                                         fprintf(stderr, " ");
 435                         }
 436
 437                         qir_dump_inst(c, inst);
 438                         fprintf(stderr, "\n");
 439                         ip++;
 440                 }
 441                 if (block->successors[1]) {
 442                         fprintf(stderr, "-> BLOCK %d, %d\n",
 443                                 block->successors[0]->index,
 444                                 block->successors[1]->index);
 445                 } else if (block->successors[0]) {
 446                         fprintf(stderr, "-> BLOCK %d\n",
 447                                 block->successors[0]->index);
 448                 }
 449         }
 450 }
 451
 452 struct qreg
 453 qir_get_temp(struct vc4_compile *c)
 454 {
 455         struct qreg reg;
 456
 457         reg.file = QFILE_TEMP;
 458         reg.index = c->num_temps++;
 459         reg.pack = 0;
 460
 461         if (c->num_temps > c->defs_array_size) {
 462                 uint32_t old_size = c->defs_array_size;
 463                 c->defs_array_size = MAX2(old_size * 2, 16);
 464                 c->defs = reralloc(c, c->defs, struct qinst *,
 465                                    c->defs_array_size);
 466                 memset(&c->defs[old_size], 0,
 467                        sizeof(c->defs[0]) * (c->defs_array_size - old_size));
 468         }
 469
 470         return reg;
 471 }
 472
 473 struct qinst *
 474 qir_inst(enum qop op, struct qreg dst, struct qreg src0, struct qreg src1)
 475 {
 476         struct qinst *inst = CALLOC_STRUCT(qinst);
 477
 478         inst->op = op;
 479         inst->dst = dst;
 480         inst->src = calloc(2, sizeof(inst->src[0]));
 481         inst->src[0] = src0;
 482         inst->src[1] = src1;
 483         inst->cond = QPU_COND_ALWAYS;
 484
 485         return inst;
 486 }
 487
 488 struct qinst *
 489 qir_inst4(enum qop op, struct qreg dst,
 490           struct qreg a,
 491           struct qreg b,
 492           struct qreg c,
 493           struct qreg d)
 494 {
 495         struct qinst *inst = CALLOC_STRUCT(qinst);
 496
 497         inst->op = op;
 498         inst->dst = dst;
 499         inst->src = calloc(4, sizeof(*inst->src));
 500         inst->src[0] = a;
 501         inst->src[1] = b;
 502         inst->src[2] = c;
 503         inst->src[3] = d;
 504
 505         return inst;
 506 }
 507
 508 static void
 509 qir_emit(struct vc4_compile *c, struct qinst *inst)
 510 {
 511         list_addtail(&inst->link, &c->cur_block->instructions);
 512 }
 513
 514 /* Updates inst to write to a new temporary, emits it, and notes the def. */
 515 struct qreg
 516 qir_emit_def(struct vc4_compile *c, struct qinst *inst)
 517 {
 518         assert(inst->dst.file == QFILE_NULL);
 519
 520         inst->dst = qir_get_temp(c);
 521
 522         if (inst->dst.file == QFILE_TEMP)
 523                 c->defs[inst->dst.index] = inst;
 524
 525         qir_emit(c, inst);
 526
 527         return inst->dst;
 528 }
 529
 530 struct qinst *
 531 qir_emit_nondef(struct vc4_compile *c, struct qinst *inst)
 532 {
 533         if (inst->dst.file == QFILE_TEMP)
 534                 c->defs[inst->dst.index] = NULL;
 535
 536         qir_emit(c, inst);
 537
 538         return inst;
 539 }
 540
 541 bool
 542 qir_reg_equals(struct qreg a, struct qreg b)
 543 {
 544         return a.file == b.file && a.index == b.index && a.pack == b.pack;
 545 }
 546
 547 struct qblock *
 548 qir_new_block(struct vc4_compile *c)
 549 {
 550         struct qblock *block = rzalloc(c, struct qblock);
 551
 552         list_inithead(&block->instructions);
 553         list_inithead(&block->qpu_inst_list);
 554
 555         block->predecessors = _mesa_set_create(block,
 556                                                _mesa_hash_pointer,
 557                                                _mesa_key_pointer_equal);
 558
 559         block->index = c->next_block_index++;
 560
 561         return block;
 562 }
 563
 564 void
 565 qir_set_emit_block(struct vc4_compile *c, struct qblock *block)
 566 {
 567         c->cur_block = block;
 568         list_addtail(&block->link, &c->blocks);
 569 }
 570
 571 struct qblock *
 572 qir_entry_block(struct vc4_compile *c)
 573 {
 574         return list_first_entry(&c->blocks, struct qblock, link);
 575 }
 576
 577 struct qblock *
 578 qir_exit_block(struct vc4_compile *c)
 579 {
 580         return list_last_entry(&c->blocks, struct qblock, link);
 581 }
 582
 583 void
 584 qir_link_blocks(struct qblock *predecessor, struct qblock *successor)
 585 {
 586         _mesa_set_add(successor->predecessors, predecessor);
 587         if (predecessor->successors[0]) {
 588                 assert(!predecessor->successors[1]);
 589                 predecessor->successors[1] = successor;
 590         } else {
 591                 predecessor->successors[0] = successor;
 592         }
 593 }
 594
 595 struct vc4_compile *
 596 qir_compile_init(void)
 597 {
 598         struct vc4_compile *c = rzalloc(NULL, struct vc4_compile);
 599
 600         list_inithead(&c->blocks);
 601         qir_set_emit_block(c, qir_new_block(c));
 602
 603         c->output_position_index = -1;
 604         c->output_color_index = -1;
 605         c->output_point_size_index = -1;
 606         c->output_sample_mask_index = -1;
 607
 608         c->def_ht = _mesa_hash_table_create(c, _mesa_hash_pointer,
 609                                             _mesa_key_pointer_equal);
 610
 611         return c;
 612 }
 613
 614 void
 615 qir_remove_instruction(struct vc4_compile *c, struct qinst *qinst)
 616 {
 617         if (qinst->dst.file == QFILE_TEMP)
 618                 c->defs[qinst->dst.index] = NULL;
 619
 620         list_del(&qinst->link);
 621         free(qinst->src);
 622         free(qinst);
 623 }
 624
 625 struct qreg
 626 qir_follow_movs(struct vc4_compile *c, struct qreg reg)
 627 {
 628         int pack = reg.pack;
 629
 630         while (reg.file == QFILE_TEMP &&
 631                c->defs[reg.index] &&
 632                (c->defs[reg.index]->op == QOP_MOV ||
 633                 c->defs[reg.index]->op == QOP_FMOV ||
 634                 c->defs[reg.index]->op == QOP_MMOV)&&
 635                !c->defs[reg.index]->dst.pack &&
 636                !c->defs[reg.index]->src[0].pack) {
 637                 reg = c->defs[reg.index]->src[0];
 638         }
 639
 640         reg.pack = pack;
 641         return reg;
 642 }
 643
 644 void
 645 qir_compile_destroy(struct vc4_compile *c)
 646 {
 647         qir_for_each_block(block, c) {
 648                 while (!list_empty(&block->instructions)) {
 649                         struct qinst *qinst =
 650                                 list_first_entry(&block->instructions,
 651                                                  struct qinst, link);
 652                         qir_remove_instruction(c, qinst);
 653                 }
 654         }
 655
 656         ralloc_free(c);
 657 }
 658
 659 const char *
 660 qir_get_stage_name(enum qstage stage)
 661 {
 662         static const char *names[] = {
 663                 [QSTAGE_FRAG] = "FS",
 664                 [QSTAGE_VERT] = "VS",
 665                 [QSTAGE_COORD] = "CS",
 666         };
 667
 668         return names[stage];
 669 }
 670
 671 struct qreg
 672 qir_uniform(struct vc4_compile *c,
 673             enum quniform_contents contents,
 674             uint32_t data)
 675 {
 676         for (int i = 0; i < c->num_uniforms; i++) {
 677                 if (c->uniform_contents[i] == contents &&
 678                     c->uniform_data[i] == data) {
 679                         return qir_reg(QFILE_UNIF, i);
 680                 }
 681         }
 682
 683         uint32_t uniform = c->num_uniforms++;
 684
 685         if (uniform >= c->uniform_array_size) {
 686                 c->uniform_array_size = MAX2(MAX2(16, uniform + 1),
 687                                              c->uniform_array_size * 2);
 688
 689                 c->uniform_data = reralloc(c, c->uniform_data,
 690                                            uint32_t,
 691                                            c->uniform_array_size);
 692                 c->uniform_contents = reralloc(c, c->uniform_contents,
 693                                                enum quniform_contents,
 694                                                c->uniform_array_size);
 695         }
 696
 697         c->uniform_contents[uniform] = contents;
 698         c->uniform_data[uniform] = data;
 699
 700         return qir_reg(QFILE_UNIF, uniform);
 701 }
 702
 703 void
 704 qir_SF(struct vc4_compile *c, struct qreg src)
 705 {
 706         struct qinst *last_inst = NULL;
 707
 708         if (!list_empty(&c->cur_block->instructions))
 709                 last_inst = (struct qinst *)c->cur_block->instructions.prev;
 710
 711         /* We don't have any way to guess which kind of MOV is implied. */
 712         assert(!src.pack);
 713
 714         if (src.file != QFILE_TEMP ||
 715             !c->defs[src.index] ||
 716             last_inst != c->defs[src.index]) {
 717                 last_inst = qir_MOV_dest(c, qir_reg(QFILE_NULL, 0), src);
 718                 last_inst = (struct qinst *)c->cur_block->instructions.prev;
 719         }
 720         last_inst->sf = true;
 721 }
 722
 723 #define OPTPASS(func)                                                   \
 724         do {                                                            \
 725                 bool stage_progress = func(c);                          \
 726                 if (stage_progress) {                                   \
 727                         progress = true;                                \
 728                         if (print_opt_debug) {                          \
 729                                 fprintf(stderr,                         \
 730                                         "QIR opt pass %2d: %s progress\n", \
 731                                         pass, #func);                   \
 732                         }                                               \
 733                         qir_validate(c);                                \
 734                 }                                                       \
 735         } while (0)
 736
 737 void
 738 qir_optimize(struct vc4_compile *c)
 739 {
 740         bool print_opt_debug = false;
 741         int pass = 1;
 742
 743         while (true) {
 744                 bool progress = false;
 745
 746                 OPTPASS(qir_opt_algebraic);
 747                 OPTPASS(qir_opt_constant_folding);
 748                 OPTPASS(qir_opt_copy_propagation);
 749                 OPTPASS(qir_opt_peephole_sf);
 750                 OPTPASS(qir_opt_dead_code);
 751                 OPTPASS(qir_opt_small_immediates);
 752                 OPTPASS(qir_opt_vpm);
 753
 754                 if (!progress)
 755                         break;
 756
 757                 pass++;
 758         }
 759 }