sim/common/genmloop.sh

   1 # This shell script emits a C file. -*- C -*-
   2 # Generate the main loop of the simulator.
   3 # Syntax: genmloop.sh /bin/sh [options] cpu mainloop.in
   4 # Options: [-mono|-multi] -scache -fast -parallel
   5 #
   6 # -scache: use the scache
   7 # -fast: include support for fast execution in addition to full featured mode
   8 # -parallel: cpu can execute multiple instructions parallely
   9 #
  10 # FIXME: "multi" support is wip.
  11
  12 # TODO
  13 # - move this C code to mainloop.in
  14 # - keep genmloop.sh
  15 # - build exec.in from .cpu file
  16 # - have each cpu provide handwritten cycle.in
  17 # - integrate with common/sim-engine.[ch]
  18 # - for sparc, have two main loops, outer one handles delay slot when npc != 0
  19 #   - inner loop does not handle delay slots, pc = pc + 4
  20
  21 type=mono
  22 #scache=
  23 #fast=
  24 #parallel=
  25
  26 shell=$1 ; shift
  27
  28 while true
  29 do
  30         case $1 in
  31         -mono) type=mono ;;
  32         -multi) type=multi ;;
  33         -no-scache) ;;
  34         -scache) scache=yes ;;
  35         -no-fast) ;;
  36         -fast) fast=yes ;;
  37         -no-parallel) ;;
  38         -parallel) parallel=yes ;;
  39         *) break ;;
  40         esac
  41         shift
  42 done
  43
  44 cpu=$1
  45 file=$2
  46
  47 cat <<EOF
  48 /* This file is is generated by the genmloop script.  DO NOT EDIT! */
  49
  50 /* Main loop for CGEN-based simulators.
  51    Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
  52    Contributed by Cygnus Support.
  53
  54 This file is part of the GNU simulators.
  55
  56 This program is free software; you can redistribute it and/or modify
  57 it under the terms of the GNU General Public License as published by
  58 the Free Software Foundation; either version 2, or (at your option)
  59 any later version.
  60
  61 This program is distributed in the hope that it will be useful,
  62 but WITHOUT ANY WARRANTY; without even the implied warranty of
  63 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  64 GNU General Public License for more details.
  65
  66 You should have received a copy of the GNU General Public License along
  67 with this program; if not, write to the Free Software Foundation, Inc.,
  68 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  69
  70 /* We want the scache version of SEM_ARG.
  71    This is used by the switch() version of the semantic code.  */
  72 EOF
  73
  74 if [ x$scache = xyes ] ; then
  75         echo "#define SCACHE_P"
  76 else
  77         echo '/*#define SCACHE_P*/'
  78         echo '#undef WITH_SCACHE'
  79         echo '#define WITH_SCACHE 0'
  80 fi
  81
  82 cat <<EOF
  83
  84 #define WANT_CPU
  85 #define WANT_CPU_@CPU@
  86
  87 #include "sim-main.h"
  88 #include "bfd.h"
  89 #include "cgen-mem.h"
  90 #include "cgen-ops.h"
  91 #include "cpu-opc.h"
  92 #include "cpu-sim.h"
  93 #include "sim-assert.h"
  94
  95 /* Tell sim_main_loop to use the scache if it's active.
  96    Collecting profile data and tracing slow us down so we don't do them in
  97    "fast mode".
  98    There are 2 possibilities on 2 axes:
  99    - use or don't use the scache
 100    - run normally (full featured) or run fast
 101    Supporting all four possibilities in one executable is a bit much but
 102    supporting full/fast seems reasonable.
 103    If the scache is configured in it is always used.
 104    ??? Need to see whether it speeds up profiling significantly or not.
 105    Speeding up tracing doesn't seem worth it.
 106    ??? Sometimes supporting more than one set of semantic functions will make
 107    the simulator too large - this should be configurable.
 108 */
 109
 110 #if WITH_SCACHE
 111 #define RUN_FAST_P(cpu) (STATE_RUN_FAST_P (CPU_STATE (cpu)))
 112 #else
 113 #define RUN_FAST_P(cpu) 0
 114 #endif
 115
 116 #ifndef SIM_PRE_EXEC_HOOK
 117 #define SIM_PRE_EXEC_HOOK(state)
 118 #endif
 119
 120 #ifndef SIM_POST_EXEC_HOOK
 121 #define SIM_POST_EXEC_HOOK(state)
 122 #endif
 123
 124 #if 0 /* FIXME:experiment */
 125 /* "sc" is local to the calling function.
 126    It is done this way to keep the internals of the implementation out of
 127    the description file.  */
 128 #define EXTRACT(cpu, pc, insn, sc, num, fast_p) \
 129 @cpu@_extract (cpu, pc, insn, sc + num, fast_p)
 130
 131 #define EXECUTE(cpu, sc, num, fast_p) \
 132 @cpu@_execute (cpu, sc + num, fast_p)
 133 #endif
 134
 135 #define GET_ATTR(cpu, num, attr) \
 136 CGEN_INSN_ATTR (sc[num].argbuf.opcode, CGEN_INSN_##attr)
 137
 138 EOF
 139
 140 ${SHELL} $file support
 141
 142 cat <<EOF
 143
 144 static volatile int keep_running;
 145 /* FIXME: Should each cpu have its own copy?  */
 146 static volatile enum sim_stop pending_reason;
 147 static volatile int pending_sigrc;
 148
 149 /* Want to measure simulator speed even in fast mode.  */
 150 static unsigned long insn_count;
 151 static SIM_ELAPSED_TIME start_time;
 152
 153 /* Forward decls of cpu-specific functions.  */
 154 static void engine_resume (SIM_DESC, int, int);
 155 static void engine_resume_full (SIM_DESC);
 156 ${scache+static void engine_resume_fast (SIM_DESC);}
 157
 158 /* Stop the simulation for REASON/SIGRC.
 159    CPU is the cpu being stopped [at address PC].
 160    If CPU is NULL, all cpu's are stopping for the same reason.  */
 161
 162 int
 163 @cpu@_engine_stop (SIM_DESC sd, SIM_CPU *cpu, PCADDR pc,
 164                    enum sim_stop reason, int sigrc)
 165 {
 166   keep_running = 0;
 167   pending_reason = reason;
 168   pending_sigrc = sigrc;
 169   return 1;
 170 }
 171
 172 void
 173 @cpu@_engine_run (SIM_DESC sd, int step, int siggnal)
 174 {
 175 #if WITH_SCACHE
 176   if (USING_SCACHE_P (sd))
 177     scache_flush (sd);
 178 #endif
 179   engine_resume (sd, step, siggnal);
 180 }
 181
 182 static void
 183 engine_resume (SIM_DESC sd, int step, int siggnal)
 184 {
 185   sim_cpu *current_cpu = STATE_CPU (sd, 0);
 186   /* These are volatile to survive setjmp.  */
 187   volatile sim_cpu *cpu = current_cpu;
 188   volatile sim_engine *engine = STATE_ENGINE (sd);
 189   jmp_buf buf;
 190   int jmpval;
 191
 192   keep_running = ! step;
 193   start_time = sim_elapsed_time_get ();
 194   /* FIXME: Having this global can slow things down a teensy bit.
 195      After things are working see about moving engine_resume_{full,fast}
 196      back into this function.  */
 197   insn_count = 0;
 198
 199   engine->jmpbuf = &buf;
 200   sim_engine_set_run_state (sd, sim_running, 0);
 201   pending_reason = sim_running;
 202   pending_sigrc = 0;
 203
 204   /* ??? Restart support to be added in time.  */
 205
 206   if (setjmp (buf))
 207     {
 208       /* Account for the last insn executed.  */
 209       ++insn_count;
 210       TRACE_INSN_FINI ((sim_cpu *) cpu, 1);
 211     }
 212   else
 213     {
 214       /* The computed goto switch can be used, and while the number of blocks
 215          may swamp the relatively few that this function contains, when running
 216          with the scache we put the actual semantic code in their own
 217          functions.  */
 218
 219 EOF
 220
 221 if [ x$fast = xyes ] ; then
 222         cat <<EOF
 223       if (step
 224           || !RUN_FAST_P (current_cpu))
 225         engine_resume_full (sd);
 226       else
 227         engine_resume_fast (sd);
 228 EOF
 229 else
 230         cat <<EOF
 231       engine_resume_full (sd);
 232 EOF
 233 fi
 234
 235 cat <<EOF
 236
 237       /* If the loop exits, either we single-stepped or @cpu@_engine_stop
 238          was called.  */
 239       if (step)
 240         sim_engine_set_run_state (sd, sim_stopped, SIM_SIGTRAP);
 241       else
 242         sim_engine_set_run_state (sd, pending_reason, pending_sigrc);
 243     }
 244
 245   engine->jmpbuf = NULL;
 246   PROFILE_EXEC_TIME (CPU_PROFILE_DATA (cpu))
 247     += sim_elapsed_time_since (start_time);
 248   PROFILE_TOTAL_INSN_COUNT (CPU_PROFILE_DATA (cpu))
 249     += insn_count;
 250 }
 251
 252 EOF
 253
 254 ##########################################################################
 255
 256 if [ x$scache = xyes ] ; then
 257         cat <<EOF
 258
 259 static void
 260 engine_resume_full (SIM_DESC sd)
 261 {
 262 #define FAST_P 0
 263   /* current_{state,cpu} exist for the generated code to use.  */
 264   SIM_DESC current_state = sd;
 265   sim_cpu *current_cpu = STATE_CPU (sd, 0);
 266
 267 EOF
 268
 269 # Any initialization code before looping starts.
 270 # Note that this code may declare some locals.
 271 ${SHELL} $file init
 272
 273 if [ x$parallel = xyes ] ; then
 274 cat << EOF
 275
 276 #if defined (HAVE_PARALLEL_EXEC) && defined (__GNUC__)
 277   {
 278     if (! CPU_IDESC_READ_INIT_P (current_cpu))
 279       {
 280 /* ??? Later maybe paste read.c in when building mainloop.c.  */
 281 #define DEFINE_LABELS
 282 #include "readx.c"
 283         CPU_IDESC_READ_INIT_P (current_cpu) = 1;
 284       }
 285   }
 286 #endif
 287
 288 EOF
 289 fi
 290
 291 cat <<EOF
 292
 293   do
 294     {
 295       /* FIXME: Later check every insn for events and such.  */
 296
 297       SIM_PRE_EXEC_HOOK (current_cpu);
 298
 299       {
 300         unsigned int hash;
 301         SCACHE *sc;
 302         PCADDR pc = PC;
 303
 304         /* First step: look up current insn in hash table.  */
 305         hash = SCACHE_HASH_PC (sd, pc);
 306         sc = CPU_SCACHE_CACHE (current_cpu) + hash;
 307
 308         /* If the entry isn't the one we want (cache miss),
 309            fetch and decode the instruction.  */
 310         if (sc->argbuf.addr != pc)
 311           {
 312             insn_t insn;
 313
 314             PROFILE_COUNT_SCACHE_MISS (current_cpu);
 315
 316 /* begin full-extract-scache */
 317 EOF
 318
 319 ${SHELL} $file full-extract-scache
 320
 321 cat <<EOF
 322 /* end full-extract-scache */
 323           }
 324         else
 325           {
 326             PROFILE_COUNT_SCACHE_HIT (current_cpu);
 327             /* Make core access statistics come out right.
 328                The size is a guess, but it's currently not used either.  */
 329             PROFILE_COUNT_CORE (current_cpu, pc, 2, exec_map);
 330           }
 331
 332 /* begin full-exec-scache */
 333 EOF
 334
 335 ${SHELL} $file full-exec-scache
 336
 337 cat <<EOF
 338 /* end full-exec-scache */
 339       }
 340
 341       SIM_POST_EXEC_HOOK (current_cpu);
 342
 343       ++insn_count;
 344     }
 345   while (keep_running);
 346 #undef FAST_P
 347 }
 348 EOF
 349
 350 ##########################################################################
 351
 352 else # ! WITH_SCACHE
 353         cat <<EOF
 354
 355 static void
 356 engine_resume_full (SIM_DESC sd)
 357 {
 358 #define FAST_P 0
 359   SIM_DESC current_state = sd;
 360   sim_cpu *current_cpu = STATE_CPU (sd, 0);
 361   SCACHE cache[MAX_LIW_INSNS];
 362   SCACHE *sc = &cache[0];
 363
 364 EOF
 365
 366 # Any initialization code before looping starts.
 367 # Note that this code may declare some locals.
 368 ${SHELL} $file init
 369
 370 if [ x$parallel = xyes ] ; then
 371 cat << EOF
 372
 373 #if defined (HAVE_PARALLEL_EXEC) && defined (__GNUC__)
 374   {
 375     if (! CPU_IDESC_READ_INIT_P (current_cpu))
 376       {
 377 /* ??? Later maybe paste read.c in when building mainloop.c.  */
 378 #define DEFINE_LABELS
 379 #include "readx.c"
 380         CPU_IDESC_READ_INIT_P (current_cpu) = 1;
 381       }
 382   }
 383 #endif
 384
 385 EOF
 386 fi
 387
 388 cat <<EOF
 389
 390   do
 391     {
 392       /* FIXME: Later check every insn for events and such.  */
 393
 394       SIM_PRE_EXEC_HOOK (current_cpu);
 395
 396       {
 397 /* begin full-{extract,exec}-noscache */
 398 EOF
 399
 400 ${SHELL} $file full-extract-noscache
 401 echo ""
 402 ${SHELL} $file full-exec-noscache
 403
 404 cat <<EOF
 405 /* end full-{extract,exec}-noscache */
 406       }
 407
 408       SIM_POST_EXEC_HOOK (current_cpu);
 409
 410       ++insn_count;
 411     }
 412   while (keep_running);
 413 #undef FAST_P
 414 }
 415
 416 EOF
 417 fi # ! WITH_SCACHE
 418
 419 ##########################################################################
 420
 421 if [ x$fast = xyes ] ; then
 422     if [ x$scache = xyes ] ; then
 423         cat <<EOF
 424
 425 static void
 426 engine_resume_fast (SIM_DESC sd)
 427 {
 428 #define FAST_P 1
 429   SIM_DESC current_state = sd;
 430   sim_cpu *current_cpu = STATE_CPU (sd, 0);
 431
 432 EOF
 433
 434 # Any initialization code before looping starts.
 435 # Note that this code may declare some locals.
 436 ${SHELL} $file init
 437
 438 if [ x$parallel = xyes ] ; then
 439 cat << EOF
 440
 441 #if defined (HAVE_PARALLEL_EXEC) && defined (__GNUC__)
 442   {
 443     if (! CPU_IDESC_READ_INIT_P (current_cpu))
 444       {
 445 /* ??? Later maybe paste read.c in when building mainloop.c.  */
 446 #define DEFINE_LABELS
 447 #include "readx.c"
 448         CPU_IDESC_READ_INIT_P (current_cpu) = 1;
 449       }
 450   }
 451 #endif
 452
 453 EOF
 454 fi
 455
 456 cat <<EOF
 457
 458 #if defined (WITH_SEM_SWITCH_FAST) && defined (__GNUC__)
 459   {
 460     if (! CPU_IDESC_SEM_INIT_P (current_cpu))
 461       {
 462 /* ??? Later maybe paste sem-switch.c in when building mainloop.c.  */
 463 #define DEFINE_LABELS
 464 #include "sem-switch.c"
 465         CPU_IDESC_SEM_INIT_P (current_cpu) = 1;
 466       }
 467   }
 468 #endif
 469
 470   do
 471     {
 472       {
 473         unsigned int hash;
 474         SCACHE *sc;
 475         PCADDR pc = PC;
 476
 477         /* First step: look up current insn in hash table.  */
 478         hash = SCACHE_HASH_PC (sd, pc);
 479         sc = CPU_SCACHE_CACHE (current_cpu) + hash;
 480
 481         /* If the entry isn't the one we want (cache miss),
 482            fetch and decode the instruction.  */
 483         if (sc->argbuf.addr != pc)
 484           {
 485             insn_t insn;
 486
 487 /* begin fast-extract-scache */
 488 EOF
 489
 490 ${SHELL} $file fast-extract-scache
 491
 492 cat <<EOF
 493 /* end fast-extract-scache */
 494           }
 495
 496 /* begin fast-exec-scache */
 497 EOF
 498
 499 ${SHELL} $file fast-exec-scache
 500
 501 cat <<EOF
 502 /* end fast-exec-scache */
 503
 504       }
 505
 506       ++insn_count;
 507     }
 508   while (keep_running);
 509 #undef FAST_P
 510 }
 511
 512 EOF
 513
 514 ##########################################################################
 515
 516 else # ! WITH_SCACHE
 517         cat <<EOF
 518
 519 static void
 520 engine_resume_fast (SIM_DESC sd)
 521 {
 522 #define FAST_P 1
 523   SIM_DESC current_state = sd;
 524   sim_cpu *current_cpu = STATE_CPU (sd, 0);
 525   SCACHE cache[MAX_LIW_INSNS];
 526   SCACHE *sc = &cache[0];
 527
 528 EOF
 529
 530 # Any initialization code before looping starts.
 531 # Note that this code may declare some locals.
 532 ${SHELL} $file init
 533
 534 if [ x$parallel = xyes ] ; then
 535 cat << EOF
 536
 537 #if defined (HAVE_PARALLEL_EXEC) && defined (__GNUC__)
 538   {
 539     if (! CPU_IDESC_READ_INIT_P (current_cpu))
 540       {
 541 /* ??? Later maybe paste read.c in when building mainloop.c.  */
 542 #define DEFINE_LABELS
 543 #include "readx.c"
 544         CPU_IDESC_READ_INIT_P (current_cpu) = 1;
 545       }
 546   }
 547 #endif
 548
 549 EOF
 550 fi
 551
 552 cat <<EOF
 553
 554   do
 555     {
 556 /* begin fast-{extract,exec}-noscache */
 557 EOF
 558
 559 ${SHELL} $file fast-extract-noscache
 560 echo ""
 561 ${SHELL} $file fast-exec-noscache
 562
 563 cat <<EOF
 564 /* end fast-{extract,exec}-noscache */
 565
 566       ++insn_count;
 567     }
 568   while (keep_running);
 569 #undef FAST_P
 570 }
 571
 572 EOF
 573
 574     fi # ! WITH_SCACHE
 575 fi # -fast