exec.c

   1 /*
   2  * Copyright (C) 2012, 2013
   3  *     Wolfgang Bumiller
   4  *     Dale Weiler
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy of
   7  * this software and associated documentation files (the "Software"), to deal in
   8  * the Software without restriction, including without limitation the rights to
   9  * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  10  * of the Software, and to permit persons to whom the Software is furnished to do
  11  * so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in all
  14  * copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24 #ifndef QCVM_LOOP
  25 #include <errno.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <stdarg.h>
  29
  30 #include "gmqcc.h"
  31
  32 static void loaderror(const char *fmt, ...)
  33 {
  34     int     err = errno;
  35     va_list ap;
  36     va_start(ap, fmt);
  37     vprintf(fmt, ap);
  38     va_end(ap);
  39     printf(": %s\n", strerror(err));
  40 }
  41
  42 static void qcvmerror(qc_program *prog, const char *fmt, ...)
  43 {
  44     va_list ap;
  45
  46     prog->vmerror++;
  47
  48     va_start(ap, fmt);
  49     vprintf(fmt, ap);
  50     va_end(ap);
  51     putchar('\n');
  52 }
  53
  54 qc_program* prog_load(const char *filename)
  55 {
  56     qc_program   *prog;
  57     prog_header   header;
  58     FILE         *file   = file_open(filename, "rb");
  59
  60     if (!file)
  61         return NULL;
  62
  63     if (file_read(&header, sizeof(header), 1, file) != 1) {
  64         loaderror("failed to read header from '%s'", filename);
  65         file_close(file);
  66         return NULL;
  67     }
  68
  69     if (header.version != 6) {
  70         loaderror("header says this is a version %i progs, we need version 6\n", header.version);
  71         file_close(file);
  72         return NULL;
  73     }
  74
  75     prog = (qc_program*)mem_a(sizeof(qc_program));
  76     if (!prog) {
  77         file_close(file);
  78         printf("failed to allocate program data\n");
  79         return NULL;
  80     }
  81     memset(prog, 0, sizeof(*prog));
  82
  83     prog->entityfields = header.entfield;
  84     prog->crc16 = header.crc16;
  85
  86     prog->filename = util_strdup(filename);
  87     if (!prog->filename) {
  88         loaderror("failed to store program name");
  89         goto error;
  90     }
  91
  92 #define read_data(hdrvar, progvar, reserved)                           \
  93     if (file_seek(file, header.hdrvar.offset, SEEK_SET) != 0) {        \
  94         loaderror("seek failed");                                      \
  95         goto error;                                                    \
  96     }                                                                  \
  97     if (file_read (                                                    \
  98             vec_add(prog->progvar, header.hdrvar.length + reserved),   \
  99             sizeof(*prog->progvar),                                    \
 100             header.hdrvar.length,                                      \
 101             file                                                       \
 102         )!= header.hdrvar.length                                       \
 103     ) {                                                                \
 104         loaderror("read failed");                                      \
 105         goto error;                                                    \
 106     }
 107 #define read_data1(x)    read_data(x, x, 0)
 108 #define read_data2(x, y) read_data(x, x, y)
 109
 110     read_data (statements, code, 0);
 111     read_data1(defs);
 112     read_data1(fields);
 113     read_data1(functions);
 114     read_data1(strings);
 115     read_data2(globals, 2); /* reserve more in case a RETURN using with the global at "the end" exists */
 116
 117     file_close(file);
 118
 119     /* profile counters */
 120     memset(vec_add(prog->profile, vec_size(prog->code)), 0, sizeof(prog->profile[0]) * vec_size(prog->code));
 121
 122     /* Add tempstring area */
 123     prog->tempstring_start = vec_size(prog->strings);
 124     prog->tempstring_at    = vec_size(prog->strings);
 125     memset(vec_add(prog->strings, 16*1024), 0, 16*1024);
 126
 127     /* spawn the world entity */
 128     vec_push(prog->entitypool, true);
 129     memset(vec_add(prog->entitydata, prog->entityfields), 0, prog->entityfields * sizeof(prog->entitydata[0]));
 130     prog->entities = 1;
 131
 132     return prog;
 133
 134 error:
 135     if (prog->filename)
 136         mem_d(prog->filename);
 137     vec_free(prog->code);
 138     vec_free(prog->defs);
 139     vec_free(prog->fields);
 140     vec_free(prog->functions);
 141     vec_free(prog->strings);
 142     vec_free(prog->globals);
 143     vec_free(prog->entitydata);
 144     vec_free(prog->entitypool);
 145     mem_d(prog);
 146     return NULL;
 147 }
 148
 149 void prog_delete(qc_program *prog)
 150 {
 151     if (prog->filename) mem_d(prog->filename);
 152     vec_free(prog->code);
 153     vec_free(prog->defs);
 154     vec_free(prog->fields);
 155     vec_free(prog->functions);
 156     vec_free(prog->strings);
 157     vec_free(prog->globals);
 158     vec_free(prog->entitydata);
 159     vec_free(prog->entitypool);
 160     vec_free(prog->localstack);
 161     vec_free(prog->stack);
 162     vec_free(prog->profile);
 163     mem_d(prog);
 164 }
 165
 166 /***********************************************************************
 167  * VM code
 168  */
 169
 170 char* prog_getstring(qc_program *prog, qcint str)
 171 {
 172     /* cast for return required for C++ */
 173     if (str < 0 || str >= (qcint)vec_size(prog->strings))
 174         return (char*)"<<<invalid string>>>";
 175     return prog->strings + str;
 176 }
 177
 178 prog_section_def* prog_entfield(qc_program *prog, qcint off)
 179 {
 180     size_t i;
 181     for (i = 0; i < vec_size(prog->fields); ++i) {
 182         if (prog->fields[i].offset == off)
 183             return (prog->fields + i);
 184     }
 185     return NULL;
 186 }
 187
 188 prog_section_def* prog_getdef(qc_program *prog, qcint off)
 189 {
 190     size_t i;
 191     for (i = 0; i < vec_size(prog->defs); ++i) {
 192         if (prog->defs[i].offset == off)
 193             return (prog->defs + i);
 194     }
 195     return NULL;
 196 }
 197
 198 qcany* prog_getedict(qc_program *prog, qcint e)
 199 {
 200     if (e >= (qcint)vec_size(prog->entitypool)) {
 201         prog->vmerror++;
 202         printf("Accessing out of bounds edict %i\n", (int)e);
 203         e = 0;
 204     }
 205     return (qcany*)(prog->entitydata + (prog->entityfields * e));
 206 }
 207
 208 qcint prog_spawn_entity(qc_program *prog)
 209 {
 210     char  *data;
 211     qcint  e;
 212     for (e = 0; e < (qcint)vec_size(prog->entitypool); ++e) {
 213         if (!prog->entitypool[e]) {
 214             data = (char*)(prog->entitydata + (prog->entityfields * e));
 215             memset(data, 0, prog->entityfields * sizeof(qcint));
 216             return e;
 217         }
 218     }
 219     vec_push(prog->entitypool, true);
 220     prog->entities++;
 221     data = (char*)vec_add(prog->entitydata, prog->entityfields);
 222     memset(data, 0, prog->entityfields * sizeof(qcint));
 223     return e;
 224 }
 225
 226 void prog_free_entity(qc_program *prog, qcint e)
 227 {
 228     if (!e) {
 229         prog->vmerror++;
 230         printf("Trying to free world entity\n");
 231         return;
 232     }
 233     if (e >= (qcint)vec_size(prog->entitypool)) {
 234         prog->vmerror++;
 235         printf("Trying to free out of bounds entity\n");
 236         return;
 237     }
 238     if (!prog->entitypool[e]) {
 239         prog->vmerror++;
 240         printf("Double free on entity\n");
 241         return;
 242     }
 243     prog->entitypool[e] = false;
 244 }
 245
 246 qcint prog_tempstring(qc_program *prog, const char *_str)
 247 {
 248     /* we don't access it, but the macro-generated functions don't use
 249      * const
 250      */
 251     char *str = (char*)_str;
 252
 253     size_t len = strlen(str);
 254     size_t at = prog->tempstring_at;
 255
 256     /* when we reach the end we start over */
 257     if (at + len >= vec_size(prog->strings))
 258         at = prog->tempstring_start;
 259
 260     /* when it doesn't fit, reallocate */
 261     if (at + len >= vec_size(prog->strings))
 262     {
 263         (void)vec_add(prog->strings, len+1);
 264         memcpy(prog->strings + at, str, len+1);
 265         return at;
 266     }
 267
 268     /* when it fits, just copy */
 269     memcpy(prog->strings + at, str, len+1);
 270     prog->tempstring_at += len+1;
 271     return at;
 272 }
 273
 274 static size_t print_escaped_string(const char *str, size_t maxlen)
 275 {
 276     size_t len = 2;
 277     putchar('"');
 278     --maxlen; /* because we're lazy and have escape sequences */
 279     while (*str) {
 280         if (len >= maxlen) {
 281             putchar('.');
 282             putchar('.');
 283             putchar('.');
 284             len += 3;
 285             break;
 286         }
 287         switch (*str) {
 288             case '\a': len += 2; putchar('\\'); putchar('a'); break;
 289             case '\b': len += 2; putchar('\\'); putchar('b'); break;
 290             case '\r': len += 2; putchar('\\'); putchar('r'); break;
 291             case '\n': len += 2; putchar('\\'); putchar('n'); break;
 292             case '\t': len += 2; putchar('\\'); putchar('t'); break;
 293             case '\f': len += 2; putchar('\\'); putchar('f'); break;
 294             case '\v': len += 2; putchar('\\'); putchar('v'); break;
 295             case '\\': len += 2; putchar('\\'); putchar('\\'); break;
 296             case '"':  len += 2; putchar('\\'); putchar('"'); break;
 297             default:
 298                 ++len;
 299                 putchar(*str);
 300                 break;
 301         }
 302         ++str;
 303     }
 304     putchar('"');
 305     return len;
 306 }
 307
 308 static void trace_print_global(qc_program *prog, unsigned int glob, int vtype)
 309 {
 310     static char spaces[28+1] = "                            ";
 311     prog_section_def *def;
 312     qcany    *value;
 313     int       len;
 314
 315     if (!glob) {
 316         len = printf("<null>,");
 317         goto done;
 318     }
 319
 320     def = prog_getdef(prog, glob);
 321     value = (qcany*)(&prog->globals[glob]);
 322
 323     len = printf("[@%u] ", glob);
 324     if (def) {
 325         const char *name = prog_getstring(prog, def->name);
 326         if (name[0] == '#')
 327             len += printf("$");
 328         else
 329             len += printf("%s ", name);
 330         vtype = def->type & DEF_TYPEMASK;
 331     }
 332
 333     switch (vtype) {
 334         case TYPE_VOID:
 335         case TYPE_ENTITY:
 336         case TYPE_FIELD:
 337         case TYPE_FUNCTION:
 338         case TYPE_POINTER:
 339             len += printf("(%i),", value->_int);
 340             break;
 341         case TYPE_VECTOR:
 342             len += printf("'%g %g %g',", value->vector[0],
 343                                          value->vector[1],
 344                                          value->vector[2]);
 345             break;
 346         case TYPE_STRING:
 347             if (value->string)
 348                 len += print_escaped_string(prog_getstring(prog, value->string), sizeof(spaces)-len-5);
 349             else
 350                 len += printf("(null)");
 351             len += printf(",");
 352             /* len += printf("\"%s\",", prog_getstring(prog, value->string)); */
 353             break;
 354         case TYPE_FLOAT:
 355         default:
 356             len += printf("%g,", value->_float);
 357             break;
 358     }
 359 done:
 360     if (len < (int)sizeof(spaces)-1) {
 361         spaces[sizeof(spaces)-1-len] = 0;
 362         file_puts(stdout, spaces);
 363         spaces[sizeof(spaces)-1-len] = ' ';
 364     }
 365 }
 366
 367 static void prog_print_statement(qc_program *prog, prog_section_statement *st)
 368 {
 369     if (st->opcode >= (sizeof(asm_instr)/sizeof(asm_instr[0]))) {
 370         printf("<illegal instruction %d>\n", st->opcode);
 371         return;
 372     }
 373     if ((prog->xflags & VMXF_TRACE) && vec_size(prog->function_stack)) {
 374         size_t i;
 375         for (i = 0; i < vec_size(prog->function_stack); ++i)
 376             printf("->");
 377         printf("%s:", vec_last(prog->function_stack));
 378     }
 379     printf(" <> %-12s", asm_instr[st->opcode].m);
 380     if (st->opcode >= INSTR_IF &&
 381         st->opcode <= INSTR_IFNOT)
 382     {
 383         trace_print_global(prog, st->o1.u1, TYPE_FLOAT);
 384         printf("%d\n", st->o2.s1);
 385     }
 386     else if (st->opcode >= INSTR_CALL0 &&
 387              st->opcode <= INSTR_CALL8)
 388     {
 389         trace_print_global(prog, st->o1.u1, TYPE_FUNCTION);
 390         printf("\n");
 391     }
 392     else if (st->opcode == INSTR_GOTO)
 393     {
 394         printf("%i\n", st->o1.s1);
 395     }
 396     else
 397     {
 398         int t[3] = { TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT };
 399         switch (st->opcode)
 400         {
 401             case INSTR_MUL_FV:
 402                 t[1] = t[2] = TYPE_VECTOR;
 403                 break;
 404             case INSTR_MUL_VF:
 405                 t[0] = t[2] = TYPE_VECTOR;
 406                 break;
 407             case INSTR_MUL_V:
 408                 t[0] = t[1] = TYPE_VECTOR;
 409                 break;
 410             case INSTR_ADD_V:
 411             case INSTR_SUB_V:
 412             case INSTR_EQ_V:
 413             case INSTR_NE_V:
 414                 t[0] = t[1] = t[2] = TYPE_VECTOR;
 415                 break;
 416             case INSTR_EQ_S:
 417             case INSTR_NE_S:
 418                 t[0] = t[1] = TYPE_STRING;
 419                 break;
 420             case INSTR_STORE_F:
 421             case INSTR_STOREP_F:
 422                 t[2] = -1;
 423                 break;
 424             case INSTR_STORE_V:
 425                 t[0] = t[1] = TYPE_VECTOR; t[2] = -1;
 426                 break;
 427             case INSTR_STORE_S:
 428                 t[0] = t[1] = TYPE_STRING; t[2] = -1;
 429                 break;
 430             case INSTR_STORE_ENT:
 431                 t[0] = t[1] = TYPE_ENTITY; t[2] = -1;
 432                 break;
 433             case INSTR_STORE_FLD:
 434                 t[0] = t[1] = TYPE_FIELD; t[2] = -1;
 435                 break;
 436             case INSTR_STORE_FNC:
 437                 t[0] = t[1] = TYPE_FUNCTION; t[2] = -1;
 438                 break;
 439             case INSTR_STOREP_V:
 440                 t[0] = TYPE_VECTOR; t[1] = TYPE_ENTITY; t[2] = -1;
 441                 break;
 442             case INSTR_STOREP_S:
 443                 t[0] = TYPE_STRING; t[1] = TYPE_ENTITY; t[2] = -1;
 444                 break;
 445             case INSTR_STOREP_ENT:
 446                 t[0] = TYPE_ENTITY; t[1] = TYPE_ENTITY; t[2] = -1;
 447                 break;
 448             case INSTR_STOREP_FLD:
 449                 t[0] = TYPE_FIELD; t[1] = TYPE_ENTITY; t[2] = -1;
 450                 break;
 451             case INSTR_STOREP_FNC:
 452                 t[0] = TYPE_FUNCTION; t[1] = TYPE_ENTITY; t[2] = -1;
 453                 break;
 454         }
 455         if (t[0] >= 0) trace_print_global(prog, st->o1.u1, t[0]);
 456         else           printf("(none),          ");
 457         if (t[1] >= 0) trace_print_global(prog, st->o2.u1, t[1]);
 458         else           printf("(none),          ");
 459         if (t[2] >= 0) trace_print_global(prog, st->o3.u1, t[2]);
 460         else           printf("(none)");
 461         printf("\n");
 462     }
 463     fflush(stdout);
 464 }
 465
 466 static qcint prog_enterfunction(qc_program *prog, prog_section_function *func)
 467 {
 468     qc_exec_stack st;
 469     size_t  parampos;
 470     int32_t p;
 471
 472     /* back up locals */
 473     st.localsp  = vec_size(prog->localstack);
 474     st.stmt     = prog->statement;
 475     st.function = func;
 476
 477     if (prog->xflags & VMXF_TRACE) {
 478         const char *str = prog_getstring(prog, func->name);
 479         vec_push(prog->function_stack, str);
 480     }
 481
 482 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 483     if (vec_size(prog->stack))
 484     {
 485         prog_section_function *cur;
 486         cur = prog->stack[vec_size(prog->stack)-1].function;
 487         if (cur)
 488         {
 489             qcint *globals = prog->globals + cur->firstlocal;
 490             vec_append(prog->localstack, cur->locals, globals);
 491         }
 492     }
 493 #else
 494     {
 495         qcint *globals = prog->globals + func->firstlocal;
 496         vec_append(prog->localstack, func->locals, globals);
 497     }
 498 #endif
 499
 500     /* copy parameters */
 501     parampos = func->firstlocal;
 502     for (p = 0; p < func->nargs; ++p)
 503     {
 504         size_t s;
 505         for (s = 0; s < func->argsize[p]; ++s) {
 506             prog->globals[parampos] = prog->globals[OFS_PARM0 + 3*p + s];
 507             ++parampos;
 508         }
 509     }
 510
 511     vec_push(prog->stack, st);
 512
 513     return func->entry;
 514 }
 515
 516 static qcint prog_leavefunction(qc_program *prog)
 517 {
 518     prog_section_function *prev = NULL;
 519     size_t oldsp;
 520
 521     qc_exec_stack st = vec_last(prog->stack);
 522
 523     if (prog->xflags & VMXF_TRACE) {
 524         if (vec_size(prog->function_stack))
 525             vec_pop(prog->function_stack);
 526     }
 527
 528 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 529     if (vec_size(prog->stack) > 1) {
 530         prev  = prog->stack[vec_size(prog->stack)-2].function;
 531         oldsp = prog->stack[vec_size(prog->stack)-2].localsp;
 532     }
 533 #else
 534     prev  = prog->stack[vec_size(prog->stack)-1].function;
 535     oldsp = prog->stack[vec_size(prog->stack)-1].localsp;
 536 #endif
 537     if (prev) {
 538         qcint *globals = prog->globals + prev->firstlocal;
 539         memcpy(globals, prog->localstack + oldsp, prev->locals * sizeof(prog->localstack[0]));
 540         /* vec_remove(prog->localstack, oldsp, vec_size(prog->localstack)-oldsp); */
 541         vec_shrinkto(prog->localstack, oldsp);
 542     }
 543
 544     vec_pop(prog->stack);
 545
 546     return st.stmt - 1; /* offset the ++st */
 547 }
 548
 549 bool prog_exec(qc_program *prog, prog_section_function *func, size_t flags, long maxjumps)
 550 {
 551     long jumpcount = 0;
 552     size_t oldxflags = prog->xflags;
 553     prog_section_statement *st;
 554
 555     prog->vmerror = 0;
 556     prog->xflags = flags;
 557
 558     st = prog->code + prog_enterfunction(prog, func);
 559     --st;
 560     switch (flags)
 561     {
 562         default:
 563         case 0:
 564         {
 565 #define QCVM_LOOP    1
 566 #define QCVM_PROFILE 0
 567 #define QCVM_TRACE   0
 568 #           include __FILE__
 569         }
 570         case (VMXF_TRACE):
 571         {
 572 #define QCVM_PROFILE 0
 573 #define QCVM_TRACE   1
 574 #           include __FILE__
 575         }
 576         case (VMXF_PROFILE):
 577         {
 578 #define QCVM_PROFILE 1
 579 #define QCVM_TRACE   0
 580 #           include __FILE__
 581         }
 582         case (VMXF_TRACE|VMXF_PROFILE):
 583         {
 584 #define QCVM_PROFILE 1
 585 #define QCVM_TRACE   1
 586 #           include __FILE__
 587         }
 588     };
 589
 590 cleanup:
 591     prog->xflags = oldxflags;
 592     vec_free(prog->localstack);
 593     vec_free(prog->stack);
 594     if (prog->vmerror)
 595         return false;
 596     return true;
 597 }
 598
 599 /***********************************************************************
 600  * main for when building the standalone executor
 601  */
 602
 603 #if defined(QCVM_EXECUTOR)
 604 #include <math.h>
 605
 606 opts_cmd_t opts;
 607
 608 const char *type_name[TYPE_COUNT] = {
 609     "void",
 610     "string",
 611     "float",
 612     "vector",
 613     "entity",
 614     "field",
 615     "function",
 616     "pointer",
 617 #if 0
 618     "integer",
 619 #endif
 620     "variant"
 621 };
 622
 623 typedef struct {
 624     int         vtype;
 625     const char *value;
 626 } qcvm_parameter;
 627
 628 qcvm_parameter *main_params = NULL;
 629
 630 #define CheckArgs(num) do {                                                    \
 631     if (prog->argc != (num)) {                                                 \
 632         prog->vmerror++;                                                       \
 633         printf("ERROR: invalid number of arguments for %s: %i, expected %i\n", \
 634         __FUNCTION__, prog->argc, (num));                                      \
 635         return -1;                                                             \
 636     }                                                                          \
 637 } while (0)
 638
 639 #define GetGlobal(idx) ((qcany*)(prog->globals + (idx)))
 640 #define GetArg(num) GetGlobal(OFS_PARM0 + 3*(num))
 641 #define Return(any) *(GetGlobal(OFS_RETURN)) = (any)
 642
 643 static int qc_print(qc_program *prog)
 644 {
 645     size_t i;
 646     const char *laststr = NULL;
 647     for (i = 0; i < (size_t)prog->argc; ++i) {
 648         qcany *str = (qcany*)(prog->globals + OFS_PARM0 + 3*i);
 649         laststr = prog_getstring(prog, str->string);
 650         printf("%s", laststr);
 651     }
 652     if (laststr && (prog->xflags & VMXF_TRACE)) {
 653         size_t len = strlen(laststr);
 654         if (!len || laststr[len-1] != '\n')
 655             printf("\n");
 656     }
 657     return 0;
 658 }
 659
 660 static int qc_error(qc_program *prog)
 661 {
 662     printf("*** VM raised an error:\n");
 663     qc_print(prog);
 664     prog->vmerror++;
 665     return -1;
 666 }
 667
 668 static int qc_ftos(qc_program *prog)
 669 {
 670     char buffer[512];
 671     qcany *num;
 672     qcany str;
 673     CheckArgs(1);
 674     num = GetArg(0);
 675     snprintf(buffer, sizeof(buffer), "%g", num->_float);
 676     str.string = prog_tempstring(prog, buffer);
 677     Return(str);
 678     return 0;
 679 }
 680
 681 static int qc_stof(qc_program *prog)
 682 {
 683     qcany *str;
 684     qcany num;
 685     CheckArgs(1);
 686     str = GetArg(0);
 687     num._float = strtof(prog_getstring(prog, str->string), NULL);
 688     Return(num);
 689     return 0;
 690 }
 691
 692 static int qc_vtos(qc_program *prog)
 693 {
 694     char buffer[512];
 695     qcany *num;
 696     qcany str;
 697     CheckArgs(1);
 698     num = GetArg(0);
 699     snprintf(buffer, sizeof(buffer), "'%g %g %g'", num->vector[0], num->vector[1], num->vector[2]);
 700     str.string = prog_tempstring(prog, buffer);
 701     Return(str);
 702     return 0;
 703 }
 704
 705 static int qc_etos(qc_program *prog)
 706 {
 707     char buffer[512];
 708     qcany *num;
 709     qcany str;
 710     CheckArgs(1);
 711     num = GetArg(0);
 712     snprintf(buffer, sizeof(buffer), "%i", num->_int);
 713     str.string = prog_tempstring(prog, buffer);
 714     Return(str);
 715     return 0;
 716 }
 717
 718 static int qc_spawn(qc_program *prog)
 719 {
 720     qcany ent;
 721     CheckArgs(0);
 722     ent.edict = prog_spawn_entity(prog);
 723     Return(ent);
 724     return (ent.edict ? 0 : -1);
 725 }
 726
 727 static int qc_kill(qc_program *prog)
 728 {
 729     qcany *ent;
 730     CheckArgs(1);
 731     ent = GetArg(0);
 732     prog_free_entity(prog, ent->edict);
 733     return 0;
 734 }
 735
 736 static int qc_vlen(qc_program *prog)
 737 {
 738     qcany *vec, len;
 739     CheckArgs(1);
 740     vec = GetArg(0);
 741     len._float = sqrt(vec->vector[0] * vec->vector[0] +
 742                       vec->vector[1] * vec->vector[1] +
 743                       vec->vector[2] * vec->vector[2]);
 744     Return(len);
 745     return 0;
 746 }
 747
 748 static int qc_strcat(qc_program *prog)
 749 {
 750     char  *buffer;
 751     size_t len1,   len2;
 752     char  *cstr1, *cstr2;
 753     qcany *str1,  *str2;
 754     qcany  out;
 755
 756     CheckArgs(2);
 757     str1 = GetArg(0);
 758     str2 = GetArg(1);
 759     cstr1 = prog_getstring(prog, str1->string);
 760     cstr2 = prog_getstring(prog, str2->string);
 761     len1 = strlen(cstr1);
 762     len2 = strlen(cstr2);
 763     buffer = (char*)mem_a(len1 + len2 + 1);
 764     memcpy(buffer, cstr1, len1);
 765     memcpy(buffer+len1, cstr2, len2+1);
 766     out.string = prog_tempstring(prog, buffer);
 767     mem_d(buffer);
 768     Return(out);
 769     return 0;
 770 }
 771
 772 static int qc_strcmp(qc_program *prog)
 773 {
 774     char  *cstr1, *cstr2;
 775     qcany *str1,  *str2;
 776     qcany out;
 777
 778     if (prog->argc != 2 && prog->argc != 3) {
 779         printf("ERROR: invalid number of arguments for strcmp/strncmp: %i, expected 2 or 3\n",
 780                prog->argc);
 781         return -1;
 782     }
 783
 784     str1 = GetArg(0);
 785     str2 = GetArg(1);
 786     cstr1 = prog_getstring(prog, str1->string);
 787     cstr2 = prog_getstring(prog, str2->string);
 788     if (prog->argc == 3)
 789         out._float = strncmp(cstr1, cstr2, GetArg(2)->_float);
 790     else
 791         out._float = strcmp(cstr1, cstr2);
 792     Return(out);
 793     return 0;
 794 }
 795
 796 static prog_builtin qc_builtins[] = {
 797     NULL,
 798     &qc_print,  /*   1   */
 799     &qc_ftos,   /*   2   */
 800     &qc_spawn,  /*   3   */
 801     &qc_kill,   /*   4   */
 802     &qc_vtos,   /*   5   */
 803     &qc_error,  /*   6   */
 804     &qc_vlen,   /*   7   */
 805     &qc_etos,   /*   8   */
 806     &qc_stof,   /*   9   */
 807     &qc_strcat, /*   10  */
 808     &qc_strcmp  /*   11  */
 809 };
 810 static size_t qc_builtins_count = sizeof(qc_builtins) / sizeof(qc_builtins[0]);
 811
 812 static const char *arg0 = NULL;
 813
 814 static void version() {
 815     printf("GMQCC-QCVM %d.%d.%d Built %s %s\n",
 816            GMQCC_VERSION_MAJOR,
 817            GMQCC_VERSION_MINOR,
 818            GMQCC_VERSION_PATCH,
 819            __DATE__,
 820            __TIME__
 821     );
 822 }
 823
 824 static void usage()
 825 {
 826     printf("usage: %s [options] [parameters] file\n", arg0);
 827     printf("options:\n");
 828     printf("  -h, --help         print this message\n"
 829            "  -trace             trace the execution\n"
 830            "  -profile           perform profiling during execution\n"
 831            "  -info              print information from the prog's header\n"
 832            "  -disasm            disassemble and exit\n"
 833            "  -disasm-func func  disassemble and exit\n"
 834            "  -printdefs         list the defs section\n"
 835            "  -printfields       list the field section\n"
 836            "  -printfuns         list functions information\n"
 837            "  -v                 be verbose\n"
 838            "  -vv                be even more verbose\n");
 839     printf("parameters:\n");
 840     printf("  -vector <V>   pass a vector parameter to main()\n"
 841            "  -float  <f>   pass a float parameter to main()\n"
 842            "  -string <s>   pass a string parameter to main() \n");
 843 }
 844
 845 static void prog_main_setparams(qc_program *prog)
 846 {
 847     size_t i;
 848     qcany *arg;
 849
 850     for (i = 0; i < vec_size(main_params); ++i) {
 851         arg = GetGlobal(OFS_PARM0 + 3*i);
 852         arg->vector[0] = 0;
 853         arg->vector[1] = 0;
 854         arg->vector[2] = 0;
 855         switch (main_params[i].vtype) {
 856             case TYPE_VECTOR:
 857 #ifdef _MSC_VER
 858                 (void)sscanf_s(main_params[i].value, " %f %f %f ",
 859                                &arg->vector[0],
 860                                &arg->vector[1],
 861                                &arg->vector[2]);
 862 #else
 863                 (void)sscanf(main_params[i].value, " %f %f %f ",
 864                              &arg->vector[0],
 865                              &arg->vector[1],
 866                              &arg->vector[2]);
 867 #endif
 868                 break;
 869             case TYPE_FLOAT:
 870                 arg->_float = atof(main_params[i].value);
 871                 break;
 872             case TYPE_STRING:
 873                 arg->string = prog_tempstring(prog, main_params[i].value);
 874                 break;
 875             default:
 876                 printf("error: unhandled parameter type: %i\n", main_params[i].vtype);
 877                 break;
 878         }
 879     }
 880 }
 881
 882 void prog_disasm_function(qc_program *prog, size_t id);
 883 int main(int argc, char **argv)
 884 {
 885     size_t      i;
 886     qcint       fnmain = -1;
 887     qc_program *prog;
 888     size_t      xflags = VMXF_DEFAULT;
 889     bool        opts_printfields = false;
 890     bool        opts_printdefs   = false;
 891     bool        opts_printfuns   = false;
 892     bool        opts_disasm      = false;
 893     bool        opts_info        = false;
 894     bool        noexec           = false;
 895     const char *progsfile        = NULL;
 896     const char **dis_list        = NULL;
 897     int         opts_v           = 0;
 898
 899     arg0 = argv[0];
 900
 901     if (argc < 2) {
 902         usage();
 903         exit(1);
 904     }
 905
 906     while (argc > 1) {
 907         if (!strcmp(argv[1], "-h") ||
 908             !strcmp(argv[1], "-help") ||
 909             !strcmp(argv[1], "--help"))
 910         {
 911             usage();
 912             exit(0);
 913         }
 914         else if (!strcmp(argv[1], "-v")) {
 915             ++opts_v;
 916             --argc;
 917             ++argv;
 918         }
 919         else if (!strncmp(argv[1], "-vv", 3)) {
 920             const char *av = argv[1]+1;
 921             for (; *av; ++av) {
 922                 if (*av == 'v')
 923                     ++opts_v;
 924                 else {
 925                     usage();
 926                     exit(1);
 927                 }
 928             }
 929             --argc;
 930             ++argv;
 931         }
 932         else if (!strcmp(argv[1], "-version") ||
 933                  !strcmp(argv[1], "--version"))
 934         {
 935             version();
 936             exit(0);
 937         }
 938         else if (!strcmp(argv[1], "-trace")) {
 939             --argc;
 940             ++argv;
 941             xflags |= VMXF_TRACE;
 942         }
 943         else if (!strcmp(argv[1], "-profile")) {
 944             --argc;
 945             ++argv;
 946             xflags |= VMXF_PROFILE;
 947         }
 948         else if (!strcmp(argv[1], "-info")) {
 949             --argc;
 950             ++argv;
 951             opts_info = true;
 952             noexec = true;
 953         }
 954         else if (!strcmp(argv[1], "-disasm")) {
 955             --argc;
 956             ++argv;
 957             opts_disasm = true;
 958             noexec = true;
 959         }
 960         else if (!strcmp(argv[1], "-disasm-func")) {
 961             --argc;
 962             ++argv;
 963             if (argc <= 1) {
 964                 usage();
 965                 exit(1);
 966             }
 967             vec_push(dis_list, argv[1]);
 968             --argc;
 969             ++argv;
 970             noexec = true;
 971         }
 972         else if (!strcmp(argv[1], "-printdefs")) {
 973             --argc;
 974             ++argv;
 975             opts_printdefs = true;
 976             noexec = true;
 977         }
 978         else if (!strcmp(argv[1], "-printfuns")) {
 979             --argc;
 980             ++argv;
 981             opts_printfuns = true;
 982             noexec = true;
 983         }
 984         else if (!strcmp(argv[1], "-printfields")) {
 985             --argc;
 986             ++argv;
 987             opts_printfields = true;
 988             noexec = true;
 989         }
 990         else if (!strcmp(argv[1], "-vector") ||
 991                  !strcmp(argv[1], "-string") ||
 992                  !strcmp(argv[1], "-float") )
 993         {
 994             qcvm_parameter p;
 995             if (argv[1][1] == 'f')
 996                 p.vtype = TYPE_FLOAT;
 997             else if (argv[1][1] == 's')
 998                 p.vtype = TYPE_STRING;
 999             else if (argv[1][1] == 'v')
1000                 p.vtype = TYPE_VECTOR;
1001
1002             --argc;
1003             ++argv;
1004             if (argc < 3) {
1005                 usage();
1006                 exit(1);
1007             }
1008             p.value = argv[1];
1009
1010             vec_push(main_params, p);
1011             --argc;
1012             ++argv;
1013         }
1014         else if (!strcmp(argv[1], "--")) {
1015             --argc;
1016             ++argv;
1017             break;
1018         }
1019         else if (argv[1][0] != '-') {
1020             if (progsfile) {
1021                 printf("only 1 program file may be specified\n");
1022                 usage();
1023                 exit(1);
1024             }
1025             progsfile = argv[1];
1026             --argc;
1027             ++argv;
1028         }
1029         else
1030         {
1031             usage();
1032             exit(1);
1033         }
1034     }
1035
1036     if (argc > 2) {
1037         usage();
1038         exit(1);
1039     }
1040     if (argc > 1) {
1041         if (progsfile) {
1042             printf("only 1 program file may be specified\n");
1043             usage();
1044             exit(1);
1045         }
1046         progsfile = argv[1];
1047         --argc;
1048         ++argv;
1049     }
1050
1051     if (!progsfile) {
1052         usage();
1053         exit(1);
1054     }
1055
1056     prog = prog_load(progsfile);
1057     if (!prog) {
1058         printf("failed to load program '%s'\n", progsfile);
1059         exit(1);
1060     }
1061
1062     prog->builtins       = qc_builtins;
1063     prog->builtins_count = qc_builtins_count;
1064
1065     if (opts_info) {
1066         printf("Program's system-checksum = 0x%04x\n", (unsigned int)prog->crc16);
1067         printf("Entity field space: %u\n", (unsigned int)prog->entityfields);
1068         printf("Globals: %u\n", (unsigned int)vec_size(prog->globals));
1069         printf("Counts:\n"
1070                "      code: %lu\n"
1071                "      defs: %lu\n"
1072                "    fields: %lu\n"
1073                " functions: %lu\n"
1074                "   strings: %lu\n",
1075                (unsigned long)vec_size(prog->code),
1076                (unsigned long)vec_size(prog->defs),
1077                (unsigned long)vec_size(prog->fields),
1078                (unsigned long)vec_size(prog->functions),
1079                (unsigned long)vec_size(prog->strings));
1080     }
1081
1082     if (opts_info) {
1083         prog_delete(prog);
1084         return 0;
1085     }
1086     for (i = 0; i < vec_size(dis_list); ++i) {
1087         size_t k;
1088         printf("Looking for `%s`\n", dis_list[i]);
1089         for (k = 1; k < vec_size(prog->functions); ++k) {
1090             const char *name = prog_getstring(prog, prog->functions[k].name);
1091             if (!strcmp(name, dis_list[i])) {
1092                 prog_disasm_function(prog, k);
1093                 break;
1094             }
1095         }
1096     }
1097     if (opts_disasm) {
1098         for (i = 1; i < vec_size(prog->functions); ++i)
1099             prog_disasm_function(prog, i);
1100         return 0;
1101     }
1102     if (opts_printdefs) {
1103         for (i = 0; i < vec_size(prog->defs); ++i) {
1104             printf("Global: %8s %-16s at %u%s\n",
1105                    type_name[prog->defs[i].type & DEF_TYPEMASK],
1106                    prog_getstring(prog, prog->defs[i].name),
1107                    (unsigned int)prog->defs[i].offset,
1108                    ((prog->defs[i].type & DEF_SAVEGLOBAL) ? " [SAVE]" : ""));
1109         }
1110     }
1111     if (opts_printfields) {
1112         for (i = 0; i < vec_size(prog->fields); ++i) {
1113             printf("Field: %8s %-16s at %u%s\n",
1114                    type_name[prog->fields[i].type],
1115                    prog_getstring(prog, prog->fields[i].name),
1116                    (unsigned int)prog->fields[i].offset,
1117                    ((prog->fields[i].type & DEF_SAVEGLOBAL) ? " [SAVE]" : ""));
1118         }
1119     }
1120     if (opts_printfuns) {
1121         for (i = 0; i < vec_size(prog->functions); ++i) {
1122             int32_t a;
1123             printf("Function: %-16s taking %i parameters:(",
1124                    prog_getstring(prog, prog->functions[i].name),
1125                    (unsigned int)prog->functions[i].nargs);
1126             for (a = 0; a < prog->functions[i].nargs; ++a) {
1127                 printf(" %i", prog->functions[i].argsize[a]);
1128             }
1129             if (opts_v > 1) {
1130                 int32_t start = prog->functions[i].entry;
1131                 if (start < 0)
1132                     printf(") builtin %i\n", (int)-start);
1133                 else {
1134                     size_t funsize = 0;
1135                     prog_section_statement *st = prog->code + start;
1136                     for (;st->opcode != INSTR_DONE; ++st)
1137                         ++funsize;
1138                     printf(") - %lu instructions", (unsigned long)funsize);
1139                     if (opts_v > 2) {
1140                         printf(" - locals: %i + %i\n",
1141                                prog->functions[i].firstlocal,
1142                                prog->functions[i].locals);
1143                     }
1144                     else
1145                         printf("\n");
1146                 }
1147             }
1148             else if (opts_v) {
1149                 printf(") locals: %i + %i\n",
1150                        prog->functions[i].firstlocal,
1151                        prog->functions[i].locals);
1152             }
1153             else
1154                 printf(")\n");
1155         }
1156     }
1157     if (!noexec) {
1158         for (i = 1; i < vec_size(prog->functions); ++i) {
1159             const char *name = prog_getstring(prog, prog->functions[i].name);
1160             if (!strcmp(name, "main"))
1161                 fnmain = (qcint)i;
1162         }
1163         if (fnmain > 0)
1164         {
1165             prog_main_setparams(prog);
1166             prog_exec(prog, &prog->functions[fnmain], xflags, VM_JUMPS_DEFAULT);
1167         }
1168         else
1169             printf("No main function found\n");
1170     }
1171
1172     prog_delete(prog);
1173     return 0;
1174 }
1175
1176 void prog_disasm_function(qc_program *prog, size_t id)
1177 {
1178     prog_section_function *fdef = prog->functions + id;
1179     prog_section_statement *st;
1180
1181     if (fdef->entry < 0) {
1182         printf("FUNCTION \"%s\" = builtin #%i\n", prog_getstring(prog, fdef->name), (int)-fdef->entry);
1183         return;
1184     }
1185     else
1186         printf("FUNCTION \"%s\"\n", prog_getstring(prog, fdef->name));
1187
1188     st = prog->code + fdef->entry;
1189     while (st->opcode != INSTR_DONE) {
1190         prog_print_statement(prog, st);
1191         ++st;
1192     }
1193 }
1194 #endif
1195 #else /* !QCVM_LOOP */
1196 /*
1197  * Everything from here on is not including into the compilation of the
1198  * executor.  This is simply code that is #included via #include __FILE__
1199  * see when QCVM_LOOP is defined, the rest of the code above do not get
1200  * re-included.  So this really just acts like one large macro, but it
1201  * sort of isn't, which makes it nicer looking.
1202  */
1203
1204 #define OPA ( (qcany*) (prog->globals + st->o1.u1) )
1205 #define OPB ( (qcany*) (prog->globals + st->o2.u1) )
1206 #define OPC ( (qcany*) (prog->globals + st->o3.u1) )
1207
1208 #define GLOBAL(x) ( (qcany*) (prog->globals + (x)) )
1209
1210 /* to be consistent with current darkplaces behaviour */
1211 #if !defined(FLOAT_IS_TRUE_FOR_INT)
1212 #   define FLOAT_IS_TRUE_FOR_INT(x) ( (x) & 0x7FFFFFFF )
1213 #endif
1214
1215 while (1) {
1216     prog_section_function  *newf;
1217     qcany          *ed;
1218     qcany          *ptr;
1219
1220     ++st;
1221
1222 #if QCVM_PROFILE
1223     prog->profile[st - prog->code]++;
1224 #endif
1225
1226 #if QCVM_TRACE
1227     prog_print_statement(prog, st);
1228 #endif
1229
1230     switch (st->opcode)
1231     {
1232         default:
1233             qcvmerror(prog, "Illegal instruction in %s\n", prog->filename);
1234             goto cleanup;
1235
1236         case INSTR_DONE:
1237         case INSTR_RETURN:
1238             /* TODO: add instruction count to function profile count */
1239             GLOBAL(OFS_RETURN)->ivector[0] = OPA->ivector[0];
1240             GLOBAL(OFS_RETURN)->ivector[1] = OPA->ivector[1];
1241             GLOBAL(OFS_RETURN)->ivector[2] = OPA->ivector[2];
1242
1243             st = prog->code + prog_leavefunction(prog);
1244             if (!vec_size(prog->stack))
1245                 goto cleanup;
1246
1247             break;
1248
1249         case INSTR_MUL_F:
1250             OPC->_float = OPA->_float * OPB->_float;
1251             break;
1252         case INSTR_MUL_V:
1253             OPC->_float = OPA->vector[0]*OPB->vector[0] +
1254                           OPA->vector[1]*OPB->vector[1] +
1255                           OPA->vector[2]*OPB->vector[2];
1256             break;
1257         case INSTR_MUL_FV:
1258             OPC->vector[0] = OPA->_float * OPB->vector[0];
1259             OPC->vector[1] = OPA->_float * OPB->vector[1];
1260             OPC->vector[2] = OPA->_float * OPB->vector[2];
1261             break;
1262         case INSTR_MUL_VF:
1263             OPC->vector[0] = OPB->_float * OPA->vector[0];
1264             OPC->vector[1] = OPB->_float * OPA->vector[1];
1265             OPC->vector[2] = OPB->_float * OPA->vector[2];
1266             break;
1267         case INSTR_DIV_F:
1268             if (OPB->_float != 0.0f)
1269                 OPC->_float = OPA->_float / OPB->_float;
1270             else
1271                 OPC->_float = 0;
1272             break;
1273
1274         case INSTR_ADD_F:
1275             OPC->_float = OPA->_float + OPB->_float;
1276             break;
1277         case INSTR_ADD_V:
1278             OPC->vector[0] = OPA->vector[0] + OPB->vector[0];
1279             OPC->vector[1] = OPA->vector[1] + OPB->vector[1];
1280             OPC->vector[2] = OPA->vector[2] + OPB->vector[2];
1281             break;
1282         case INSTR_SUB_F:
1283             OPC->_float = OPA->_float - OPB->_float;
1284             break;
1285         case INSTR_SUB_V:
1286             OPC->vector[0] = OPA->vector[0] - OPB->vector[0];
1287             OPC->vector[1] = OPA->vector[1] - OPB->vector[1];
1288             OPC->vector[2] = OPA->vector[2] - OPB->vector[2];
1289             break;
1290
1291         case INSTR_EQ_F:
1292             OPC->_float = (OPA->_float == OPB->_float);
1293             break;
1294         case INSTR_EQ_V:
1295             OPC->_float = ((OPA->vector[0] == OPB->vector[0]) &&
1296                            (OPA->vector[1] == OPB->vector[1]) &&
1297                            (OPA->vector[2] == OPB->vector[2]) );
1298             break;
1299         case INSTR_EQ_S:
1300             OPC->_float = !strcmp(prog_getstring(prog, OPA->string),
1301                                   prog_getstring(prog, OPB->string));
1302             break;
1303         case INSTR_EQ_E:
1304             OPC->_float = (OPA->_int == OPB->_int);
1305             break;
1306         case INSTR_EQ_FNC:
1307             OPC->_float = (OPA->function == OPB->function);
1308             break;
1309         case INSTR_NE_F:
1310             OPC->_float = (OPA->_float != OPB->_float);
1311             break;
1312         case INSTR_NE_V:
1313             OPC->_float = ((OPA->vector[0] != OPB->vector[0]) ||
1314                            (OPA->vector[1] != OPB->vector[1]) ||
1315                            (OPA->vector[2] != OPB->vector[2]) );
1316             break;
1317         case INSTR_NE_S:
1318             OPC->_float = !!strcmp(prog_getstring(prog, OPA->string),
1319                                    prog_getstring(prog, OPB->string));
1320             break;
1321         case INSTR_NE_E:
1322             OPC->_float = (OPA->_int != OPB->_int);
1323             break;
1324         case INSTR_NE_FNC:
1325             OPC->_float = (OPA->function != OPB->function);
1326             break;
1327
1328         case INSTR_LE:
1329             OPC->_float = (OPA->_float <= OPB->_float);
1330             break;
1331         case INSTR_GE:
1332             OPC->_float = (OPA->_float >= OPB->_float);
1333             break;
1334         case INSTR_LT:
1335             OPC->_float = (OPA->_float < OPB->_float);
1336             break;
1337         case INSTR_GT:
1338             OPC->_float = (OPA->_float > OPB->_float);
1339             break;
1340
1341         case INSTR_LOAD_F:
1342         case INSTR_LOAD_S:
1343         case INSTR_LOAD_FLD:
1344         case INSTR_LOAD_ENT:
1345         case INSTR_LOAD_FNC:
1346             if (OPA->edict < 0 || OPA->edict >= prog->entities) {
1347                 qcvmerror(prog, "progs `%s` attempted to read an out of bounds entity", prog->filename);
1348                 goto cleanup;
1349             }
1350             if ((unsigned int)(OPB->_int) >= (unsigned int)(prog->entityfields)) {
1351                 qcvmerror(prog, "prog `%s` attempted to read an invalid field from entity (%i)",
1352                           prog->filename,
1353                           OPB->_int);
1354                 goto cleanup;
1355             }
1356             ed = prog_getedict(prog, OPA->edict);
1357             OPC->_int = ((qcany*)( ((qcint*)ed) + OPB->_int ))->_int;
1358             break;
1359         case INSTR_LOAD_V:
1360             if (OPA->edict < 0 || OPA->edict >= prog->entities) {
1361                 qcvmerror(prog, "progs `%s` attempted to read an out of bounds entity", prog->filename);
1362                 goto cleanup;
1363             }
1364             if (OPB->_int < 0 || OPB->_int + 3 > (qcint)prog->entityfields)
1365             {
1366                 qcvmerror(prog, "prog `%s` attempted to read an invalid field from entity (%i)",
1367                           prog->filename,
1368                           OPB->_int + 2);
1369                 goto cleanup;
1370             }
1371             ed = prog_getedict(prog, OPA->edict);
1372             OPC->ivector[0] = ((qcany*)( ((qcint*)ed) + OPB->_int ))->ivector[0];
1373             OPC->ivector[1] = ((qcany*)( ((qcint*)ed) + OPB->_int ))->ivector[1];
1374             OPC->ivector[2] = ((qcany*)( ((qcint*)ed) + OPB->_int ))->ivector[2];
1375             break;
1376
1377         case INSTR_ADDRESS:
1378             if (OPA->edict < 0 || OPA->edict >= prog->entities) {
1379                 qcvmerror(prog, "prog `%s` attempted to address an out of bounds entity %i", prog->filename, OPA->edict);
1380                 goto cleanup;
1381             }
1382             if ((unsigned int)(OPB->_int) >= (unsigned int)(prog->entityfields))
1383             {
1384                 qcvmerror(prog, "prog `%s` attempted to read an invalid field from entity (%i)",
1385                           prog->filename,
1386                           OPB->_int);
1387                 goto cleanup;
1388             }
1389
1390             ed = prog_getedict(prog, OPA->edict);
1391             OPC->_int = ((qcint*)ed) - prog->entitydata + OPB->_int;
1392             break;
1393
1394         case INSTR_STORE_F:
1395         case INSTR_STORE_S:
1396         case INSTR_STORE_ENT:
1397         case INSTR_STORE_FLD:
1398         case INSTR_STORE_FNC:
1399             OPB->_int = OPA->_int;
1400             break;
1401         case INSTR_STORE_V:
1402             OPB->ivector[0] = OPA->ivector[0];
1403             OPB->ivector[1] = OPA->ivector[1];
1404             OPB->ivector[2] = OPA->ivector[2];
1405             break;
1406
1407         case INSTR_STOREP_F:
1408         case INSTR_STOREP_S:
1409         case INSTR_STOREP_ENT:
1410         case INSTR_STOREP_FLD:
1411         case INSTR_STOREP_FNC:
1412             if (OPB->_int < 0 || OPB->_int >= (qcint)vec_size(prog->entitydata)) {
1413                 qcvmerror(prog, "`%s` attempted to write to an out of bounds edict (%i)", prog->filename, OPB->_int);
1414                 goto cleanup;
1415             }
1416             if (OPB->_int < (qcint)prog->entityfields && !prog->allowworldwrites)
1417                 qcvmerror(prog, "`%s` tried to assign to world.%s (field %i)\n",
1418                           prog->filename,
1419                           prog_getstring(prog, prog_entfield(prog, OPB->_int)->name),
1420                           OPB->_int);
1421             ptr = (qcany*)(prog->entitydata + OPB->_int);
1422             ptr->_int = OPA->_int;
1423             break;
1424         case INSTR_STOREP_V:
1425             if (OPB->_int < 0 || OPB->_int + 2 >= (qcint)vec_size(prog->entitydata)) {
1426                 qcvmerror(prog, "`%s` attempted to write to an out of bounds edict (%i)", prog->filename, OPB->_int);
1427                 goto cleanup;
1428             }
1429             if (OPB->_int < (qcint)prog->entityfields && !prog->allowworldwrites)
1430                 qcvmerror(prog, "`%s` tried to assign to world.%s (field %i)\n",
1431                           prog->filename,
1432                           prog_getstring(prog, prog_entfield(prog, OPB->_int)->name),
1433                           OPB->_int);
1434             ptr = (qcany*)(prog->entitydata + OPB->_int);
1435             ptr->ivector[0] = OPA->ivector[0];
1436             ptr->ivector[1] = OPA->ivector[1];
1437             ptr->ivector[2] = OPA->ivector[2];
1438             break;
1439
1440         case INSTR_NOT_F:
1441             OPC->_float = !FLOAT_IS_TRUE_FOR_INT(OPA->_int);
1442             break;
1443         case INSTR_NOT_V:
1444             OPC->_float = !OPA->vector[0] &&
1445                           !OPA->vector[1] &&
1446                           !OPA->vector[2];
1447             break;
1448         case INSTR_NOT_S:
1449             OPC->_float = !OPA->string ||
1450                           !*prog_getstring(prog, OPA->string);
1451             break;
1452         case INSTR_NOT_ENT:
1453             OPC->_float = (OPA->edict == 0);
1454             break;
1455         case INSTR_NOT_FNC:
1456             OPC->_float = !OPA->function;
1457             break;
1458
1459         case INSTR_IF:
1460             /* this is consistent with darkplaces' behaviour */
1461             if(FLOAT_IS_TRUE_FOR_INT(OPA->_int))
1462             {
1463                 st += st->o2.s1 - 1;    /* offset the s++ */
1464                 if (++jumpcount >= maxjumps)
1465                     qcvmerror(prog, "`%s` hit the runaway loop counter limit of %li jumps", prog->filename, jumpcount);
1466             }
1467             break;
1468         case INSTR_IFNOT:
1469             if(!FLOAT_IS_TRUE_FOR_INT(OPA->_int))
1470             {
1471                 st += st->o2.s1 - 1;    /* offset the s++ */
1472                 if (++jumpcount >= maxjumps)
1473                     qcvmerror(prog, "`%s` hit the runaway loop counter limit of %li jumps", prog->filename, jumpcount);
1474             }
1475             break;
1476
1477         case INSTR_CALL0:
1478         case INSTR_CALL1:
1479         case INSTR_CALL2:
1480         case INSTR_CALL3:
1481         case INSTR_CALL4:
1482         case INSTR_CALL5:
1483         case INSTR_CALL6:
1484         case INSTR_CALL7:
1485         case INSTR_CALL8:
1486             prog->argc = st->opcode - INSTR_CALL0;
1487             if (!OPA->function)
1488                 qcvmerror(prog, "NULL function in `%s`", prog->filename);
1489
1490             if(!OPA->function || OPA->function >= (qcint)vec_size(prog->functions))
1491             {
1492                 qcvmerror(prog, "CALL outside the program in `%s`", prog->filename);
1493                 goto cleanup;
1494             }
1495
1496             newf = &prog->functions[OPA->function];
1497             newf->profile++;
1498
1499             prog->statement = (st - prog->code) + 1;
1500
1501             if (newf->entry < 0)
1502             {
1503                 /* negative statements are built in functions */
1504                 qcint builtinnumber = -newf->entry;
1505                 if (builtinnumber < (qcint)prog->builtins_count && prog->builtins[builtinnumber])
1506                     prog->builtins[builtinnumber](prog);
1507                 else
1508                     qcvmerror(prog, "No such builtin #%i in %s! Try updating your gmqcc sources",
1509                               builtinnumber, prog->filename);
1510             }
1511             else
1512                 st = prog->code + prog_enterfunction(prog, newf) - 1; /* offset st++ */
1513             if (prog->vmerror)
1514                 goto cleanup;
1515             break;
1516
1517         case INSTR_STATE:
1518             qcvmerror(prog, "`%s` tried to execute a STATE operation", prog->filename);
1519             break;
1520
1521         case INSTR_GOTO:
1522             st += st->o1.s1 - 1;    /* offset the s++ */
1523             if (++jumpcount == 10000000)
1524                 qcvmerror(prog, "`%s` hit the runaway loop counter limit of %li jumps", prog->filename, jumpcount);
1525             break;
1526
1527         case INSTR_AND:
1528             OPC->_float = FLOAT_IS_TRUE_FOR_INT(OPA->_int) &&
1529                           FLOAT_IS_TRUE_FOR_INT(OPB->_int);
1530             break;
1531         case INSTR_OR:
1532             OPC->_float = FLOAT_IS_TRUE_FOR_INT(OPA->_int) ||
1533                           FLOAT_IS_TRUE_FOR_INT(OPB->_int);
1534             break;
1535
1536         case INSTR_BITAND:
1537             OPC->_float = ((int)OPA->_float) & ((int)OPB->_float);
1538             break;
1539         case INSTR_BITOR:
1540             OPC->_float = ((int)OPA->_float) | ((int)OPB->_float);
1541             break;
1542     }
1543 }
1544
1545 #undef QCVM_PROFILE
1546 #undef QCVM_TRACE
1547 #endif /* !QCVM_LOOP */