src/intel/tools/i965_asm.c

   1 /*
   2  * Copyright © 2018 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  */
  24
  25 #include <stdio.h>
  26 #include <getopt.h>
  27 #include "i965_asm.h"
  28
  29 enum opt_output_type {
  30    OPT_OUTPUT_HEX,
  31    OPT_OUTPUT_C_LITERAL,
  32    OPT_OUTPUT_BIN,
  33 };
  34
  35 extern FILE *yyin;
  36 struct brw_codegen *p;
  37 static enum opt_output_type output_type = OPT_OUTPUT_BIN;
  38 char *input_filename = NULL;
  39 int errors;
  40
  41 struct list_head instr_labels;
  42 struct list_head target_labels;
  43
  44 static void
  45 print_help(const char *progname, FILE *file)
  46 {
  47    fprintf(file,
  48            "Usage: %s [OPTION] inputfile\n"
  49            "Assemble i965 instructions from input file.\n\n"
  50            "    -h, --help             display this help and exit\n"
  51            "    -t, --type=OUTPUT_TYPE OUTPUT_TYPE can be 'bin' (default if omitted),\n"
  52            "                           'c_literal', or 'hex'\n"
  53            "    -o, --output           specify output file\n"
  54            "        --compact          print compacted instructions\n"
  55            "    -g, --gen=platform     assemble instructions for given \n"
  56            "                           platform (3 letter platform name)\n"
  57            "Example:\n"
  58            "    i965_asm -g kbl input.asm -t hex -o output\n",
  59            progname);
  60 }
  61
  62 static uint32_t
  63 get_dword(const brw_inst *inst, int idx)
  64 {
  65    uint32_t dword;
  66    memcpy(&dword, (char *)inst + 4 * idx, sizeof(dword));
  67    return dword;
  68 }
  69
  70 static void
  71 print_instruction(FILE *output, bool compact, const brw_inst *instruction)
  72 {
  73    int byte_limit;
  74
  75    byte_limit = (compact == true) ? 8 : 16;
  76
  77    switch (output_type) {
  78    case OPT_OUTPUT_HEX: {
  79       fprintf(output, "%02x", ((unsigned char *)instruction)[0]);
  80
  81       for (unsigned i = 1; i < byte_limit; i++) {
  82          fprintf(output, " %02x", ((unsigned char *)instruction)[i]);
  83       }
  84       break;
  85    }
  86    case OPT_OUTPUT_C_LITERAL: {
  87       fprintf(output, "\t0x%08x,", get_dword(instruction, 0));
  88
  89       for (unsigned i = 1; i < byte_limit / 4; i++)
  90          fprintf(output, " 0x%08x,", get_dword(instruction, i));
  91
  92       break;
  93    }
  94    case OPT_OUTPUT_BIN:
  95       fwrite(instruction, 1, byte_limit, output);
  96       break;
  97    }
  98
  99    if (output_type != OPT_OUTPUT_BIN) {
 100       fprintf(output, "\n");
 101    }
 102 }
 103
 104 static struct gen_device_info *
 105 i965_disasm_init(uint16_t pci_id)
 106 {
 107    struct gen_device_info *devinfo;
 108
 109    devinfo = malloc(sizeof *devinfo);
 110    if (devinfo == NULL)
 111       return NULL;
 112
 113    if (!gen_get_device_info_from_pci_id(pci_id, devinfo)) {
 114       fprintf(stderr, "can't find device information: pci_id=0x%x\n",
 115               pci_id);
 116       free(devinfo);
 117       return NULL;
 118    }
 119
 120    return devinfo;
 121 }
 122
 123 static bool
 124 i965_postprocess_labels()
 125 {
 126    if (p->devinfo->gen < 6) {
 127       return true;
 128    }
 129
 130    void *store = p->store;
 131
 132    struct target_label *tlabel;
 133    struct instr_label *ilabel, *s;
 134
 135    const unsigned to_bytes_scale = brw_jump_scale(p->devinfo);
 136
 137    LIST_FOR_EACH_ENTRY(tlabel, &target_labels, link) {
 138       LIST_FOR_EACH_ENTRY_SAFE(ilabel, s, &instr_labels, link) {
 139          if (!strcmp(tlabel->name, ilabel->name)) {
 140             brw_inst *inst = store + ilabel->offset;
 141
 142             int relative_offset = (tlabel->offset - ilabel->offset) / sizeof(brw_inst);
 143             relative_offset *= to_bytes_scale;
 144
 145             unsigned opcode = brw_inst_opcode(p->devinfo, inst);
 146
 147             if (ilabel->type == INSTR_LABEL_JIP) {
 148                switch (opcode) {
 149                case BRW_OPCODE_IF:
 150                case BRW_OPCODE_ELSE:
 151                case BRW_OPCODE_ENDIF:
 152                case BRW_OPCODE_WHILE:
 153                   if (p->devinfo->gen >= 7) {
 154                      brw_inst_set_jip(p->devinfo, inst, relative_offset);
 155                   } else if (p->devinfo->gen == 6) {
 156                      brw_inst_set_gen6_jump_count(p->devinfo, inst, relative_offset);
 157                   }
 158                   break;
 159                case BRW_OPCODE_BREAK:
 160                case BRW_OPCODE_HALT:
 161                case BRW_OPCODE_CONTINUE:
 162                   brw_inst_set_jip(p->devinfo, inst, relative_offset);
 163                   break;
 164                default:
 165                   fprintf(stderr, "Unknown opcode %d with JIP label\n", opcode);
 166                   return false;
 167                }
 168             } else {
 169                switch (opcode) {
 170                case BRW_OPCODE_IF:
 171                case BRW_OPCODE_ELSE:
 172                   if (p->devinfo->gen > 7) {
 173                      brw_inst_set_uip(p->devinfo, inst, relative_offset);
 174                   } else if (p->devinfo->gen == 7) {
 175                      brw_inst_set_uip(p->devinfo, inst, relative_offset);
 176                   } else if (p->devinfo->gen == 6) {
 177                      // Nothing
 178                   }
 179                   break;
 180                case BRW_OPCODE_WHILE:
 181                case BRW_OPCODE_ENDIF:
 182                   fprintf(stderr, "WHILE/ENDIF cannot have UIP offset\n");
 183                   return false;
 184                case BRW_OPCODE_BREAK:
 185                case BRW_OPCODE_CONTINUE:
 186                case BRW_OPCODE_HALT:
 187                   brw_inst_set_uip(p->devinfo, inst, relative_offset);
 188                   break;
 189                default:
 190                   fprintf(stderr, "Unknown opcode %d with UIP label\n", opcode);
 191                   return false;
 192                }
 193             }
 194
 195             list_del(&ilabel->link);
 196          }
 197       }
 198    }
 199
 200    LIST_FOR_EACH_ENTRY(ilabel, &instr_labels, link) {
 201       fprintf(stderr, "Unknown label '%s'\n", ilabel->name);
 202    }
 203
 204    return list_is_empty(&instr_labels);
 205 }
 206
 207 int main(int argc, char **argv)
 208 {
 209    char *output_file = NULL;
 210    char c;
 211    FILE *output = stdout;
 212    bool help = false, compact = false;
 213    void *store;
 214    uint64_t pci_id = 0;
 215    int offset = 0, err;
 216    int start_offset = 0;
 217    struct disasm_info *disasm_info;
 218    struct gen_device_info *devinfo = NULL;
 219    int result = EXIT_FAILURE;
 220    list_inithead(&instr_labels);
 221    list_inithead(&target_labels);
 222
 223    const struct option i965_asm_opts[] = {
 224       { "help",          no_argument,       (int *) &help,      true },
 225       { "type",          required_argument, NULL,               't' },
 226       { "gen",           required_argument, NULL,               'g' },
 227       { "output",        required_argument, NULL,               'o' },
 228       { "compact",       no_argument,       (int *) &compact,   true },
 229       { NULL,            0,                 NULL,               0 }
 230    };
 231
 232    while ((c = getopt_long(argc, argv, ":t:g:o:h", i965_asm_opts, NULL)) != -1) {
 233       switch (c) {
 234       case 'g': {
 235          const int id = gen_device_name_to_pci_device_id(optarg);
 236          if (id < 0) {
 237             fprintf(stderr, "can't parse gen: '%s', expected 3 letter "
 238                             "platform name\n", optarg);
 239             goto end;
 240          } else {
 241             pci_id = id;
 242          }
 243          break;
 244       }
 245       case 'h':
 246          help = true;
 247          print_help(argv[0], stderr);
 248          goto end;
 249       case 't': {
 250          if (strcmp(optarg, "hex") == 0) {
 251             output_type = OPT_OUTPUT_HEX;
 252          } else if (strcmp(optarg, "c_literal") == 0) {
 253             output_type = OPT_OUTPUT_C_LITERAL;
 254          } else if (strcmp(optarg, "bin") == 0) {
 255             output_type = OPT_OUTPUT_BIN;
 256          } else {
 257             fprintf(stderr, "invalid value for --type: %s\n", optarg);
 258             goto end;
 259          }
 260          break;
 261       }
 262       case 'o':
 263          output_file = strdup(optarg);
 264          break;
 265       case 0:
 266          break;
 267       case ':':
 268          fprintf(stderr, "%s: option `-%c' requires an argument\n",
 269                  argv[0], optopt);
 270          goto end;
 271       case '?':
 272       default:
 273          fprintf(stderr, "%s: option `-%c' is invalid: ignored\n",
 274                  argv[0], optopt);
 275          goto end;
 276       }
 277    }
 278
 279    if (help || !pci_id) {
 280       print_help(argv[0], stderr);
 281       goto end;
 282    }
 283
 284    if (!argv[optind]) {
 285       fprintf(stderr, "Please specify input file\n");
 286       goto end;
 287    }
 288
 289    input_filename = strdup(argv[optind]);
 290    yyin = fopen(input_filename, "r");
 291    if (!yyin) {
 292       fprintf(stderr, "Unable to read input file : %s\n",
 293               input_filename);
 294       goto end;
 295    }
 296
 297    if (output_file) {
 298       output = fopen(output_file, "w");
 299       if (!output) {
 300          fprintf(stderr, "Couldn't open output file\n");
 301          goto end;
 302       }
 303    }
 304
 305    devinfo = i965_disasm_init(pci_id);
 306    if (!devinfo) {
 307       fprintf(stderr, "Unable to allocate memory for "
 308                       "gen_device_info struct instance.\n");
 309       goto end;
 310    }
 311
 312    p = rzalloc(NULL, struct brw_codegen);
 313    brw_init_codegen(devinfo, p, p);
 314    p->automatic_exec_sizes = false;
 315
 316    err = yyparse();
 317    if (err || errors)
 318       goto end;
 319
 320    if (!i965_postprocess_labels())
 321       goto end;
 322
 323    store = p->store;
 324
 325    disasm_info = disasm_initialize(p->devinfo, NULL);
 326    if (!disasm_info) {
 327       fprintf(stderr, "Unable to initialize disasm_info struct instance\n");
 328       goto end;
 329    }
 330
 331    if (output_type == OPT_OUTPUT_C_LITERAL)
 332       fprintf(output, "{\n");
 333
 334    brw_validate_instructions(p->devinfo, p->store, 0,
 335                              p->next_insn_offset, disasm_info);
 336
 337    const int nr_insn = (p->next_insn_offset - start_offset) / 16;
 338
 339    if (compact)
 340       brw_compact_instructions(p, start_offset, disasm_info);
 341
 342    for (int i = 0; i < nr_insn; i++) {
 343       const brw_inst *insn = store + offset;
 344       bool compacted = false;
 345
 346       if (compact && brw_inst_cmpt_control(p->devinfo, insn)) {
 347             offset += 8;
 348             compacted = true;
 349       } else {
 350             offset += 16;
 351       }
 352
 353       print_instruction(output, compacted, insn);
 354    }
 355
 356    ralloc_free(disasm_info);
 357
 358    if (output_type == OPT_OUTPUT_C_LITERAL)
 359       fprintf(output, "}");
 360
 361    result = EXIT_SUCCESS;
 362    goto end;
 363
 364 end:
 365    free(input_filename);
 366    free(output_file);
 367
 368    if (yyin)
 369       fclose(yyin);
 370
 371    if (output)
 372       fclose(output);
 373
 374    if (p)
 375       ralloc_free(p);
 376
 377    if (devinfo)
 378       free(devinfo);
 379
 380    exit(result);
 381 }