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 cache 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 cache
 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 cache 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 /* Want to measure simulator speed even in fast mode.  */
 146 static unsigned long insn_count;
 147 static SIM_ELAPSED_TIME start_time;
 148
 149 /* Forward decls of cpu-specific functions.  */
 150 static void engine_resume (SIM_DESC, int, int);
 151 static void engine_resume_full (SIM_DESC);
 152 ${scache+static void engine_resume_fast (SIM_DESC);}
 153
 154 int
 155 @cpu@_engine_stop (SIM_DESC sd)
 156 {
 157   keep_running = 0;
 158   return 1;
 159 }
 160
 161 void
 162 @cpu@_engine_run (SIM_DESC sd, int step, int siggnal)
 163 {
 164 #if WITH_SCACHE
 165   if (USING_SCACHE_P (sd))
 166     scache_flush (sd);
 167 #endif
 168   engine_resume (sd, step, siggnal);
 169 }
 170
 171 static void
 172 engine_resume (SIM_DESC sd, int step, int siggnal)
 173 {
 174   sim_cpu *current_cpu = STATE_CPU (sd, 0);
 175   /* These are volatile to survive setjmp.  */
 176   volatile sim_cpu *cpu = current_cpu;
 177   volatile sim_engine *engine = STATE_ENGINE (sd);
 178   jmp_buf buf;
 179   int jmpval;
 180
 181   keep_running = ! step;
 182   start_time = sim_elapsed_time_get ();
 183   /* FIXME: Having this global can slow things down a teensy bit.
 184      After things are working see about moving engine_resume_{full,fast}
 185      back into this function.  */
 186   insn_count = 0;
 187
 188   engine->jmpbuf = &buf;
 189   if (setjmp (buf))
 190     {
 191       /* Account for the last insn executed.  */
 192       ++insn_count;
 193
 194       engine->jmpbuf = NULL;
 195       TRACE_INSN_FINI ((sim_cpu *) cpu);
 196       PROFILE_EXEC_TIME (CPU_PROFILE_DATA (cpu))
 197         += sim_elapsed_time_since (start_time);
 198       PROFILE_TOTAL_INSN_COUNT (CPU_PROFILE_DATA (cpu))
 199         += insn_count;
 200
 201       return;
 202     }
 203
 204   /* ??? Restart support to be added in time.  */
 205
 206   /* The computed goto switch can be used, and while the number of blocks
 207      may swamp the relatively few that this function contains, when running
 208      with the scache we put the actual semantic code in their own
 209      functions.  */
 210
 211 EOF
 212
 213 if [ x$fast = xyes ] ; then
 214         cat <<EOF
 215   if (step
 216       || !RUN_FAST_P (current_cpu))
 217     engine_resume_full (sd);
 218   else
 219     engine_resume_fast (sd);
 220 EOF
 221 else
 222         cat <<EOF
 223   engine_resume_full (sd);
 224 EOF
 225 fi
 226
 227 cat <<EOF
 228
 229   /* If the loop exits, either we single-stepped or engine_stop was called.
 230      In either case we need to call engine_halt: to properly exit this
 231      function we must go through the setjmp executed above.  */
 232   if (step)
 233     sim_engine_halt (sd, current_cpu, NULL, NULL_CIA, sim_stopped, SIM_SIGTRAP);
 234   sim_engine_halt (sd, current_cpu, NULL, NULL_CIA, sim_stopped, SIM_SIGINT);
 235 }
 236
 237 EOF
 238
 239 ##########################################################################
 240
 241 if [ x$scache = xyes ] ; then
 242         cat <<EOF
 243
 244 static void
 245 engine_resume_full (SIM_DESC sd)
 246 {
 247 #define FAST_P 0
 248   /* current_{state,cpu} exist for the generated code to use.  */
 249   SIM_DESC current_state = sd;
 250   sim_cpu *current_cpu = STATE_CPU (sd, 0);
 251 ${parallel+  int icount = 0;}
 252
 253 EOF
 254
 255 # Any initialization code before looping starts.
 256 # Note that this code may declare some locals.
 257 ${SHELL} $file init
 258
 259 if [ x$parallel = xyes ] ; then
 260 cat << EOF
 261
 262 #if defined (HAVE_PARALLEL_EXEC) && defined (__GNUC__)
 263   {
 264     static read_init_p = 0;
 265     if (! read_init_p)
 266       {
 267 /* ??? Later maybe paste read.c in when building mainloop.c.  */
 268 #define DEFINE_LABELS
 269 #include "readx.c"
 270         read_init_p = 1;
 271       }
 272   }
 273 #endif
 274
 275 EOF
 276 fi
 277
 278 cat <<EOF
 279
 280   do
 281     {
 282       /* FIXME: Later check every insn for events and such.  */
 283
 284       SIM_PRE_EXEC_HOOK (current_cpu);
 285
 286       {
 287         unsigned int hash;
 288         SCACHE *sc;
 289         PCADDR pc = PC;
 290
 291         /* First step: look up current insn in hash table.  */
 292         hash = SCACHE_HASH_PC (sd, pc);
 293         sc = CPU_SCACHE_CACHE (current_cpu) + hash;
 294
 295         /* If the entry isn't the one we want (cache miss),
 296            fetch and decode the instruction.  */
 297         if (sc->argbuf.addr != pc)
 298           {
 299             insn_t insn;
 300
 301             PROFILE_COUNT_SCACHE_MISS (current_cpu);
 302
 303 /* begin full-extract-scache */
 304 EOF
 305
 306 ${SHELL} $file full-extract-scache
 307
 308 cat <<EOF
 309 /* end full-extract-scache */
 310           }
 311         else
 312           {
 313             PROFILE_COUNT_SCACHE_HIT (current_cpu);
 314             /* Make core access statistics come out right.
 315                The size is a guess, but it's currently not used either.  */
 316             PROFILE_COUNT_CORE (current_cpu, pc, 2, sim_core_execute_map);
 317           }
 318
 319 /* begin full-exec-scache */
 320 EOF
 321
 322 ${SHELL} $file full-exec-scache
 323
 324 cat <<EOF
 325 /* end full-exec-scache */
 326       }
 327
 328       SIM_POST_EXEC_HOOK (current_cpu);
 329
 330       ++insn_count;
 331     }
 332   while (keep_running);
 333 #undef FAST_P
 334 }
 335 EOF
 336
 337 ##########################################################################
 338
 339 else # ! WITH_SCACHE
 340         cat <<EOF
 341
 342 static void
 343 engine_resume_full (SIM_DESC sd)
 344 {
 345 #define FAST_P 0
 346   SIM_DESC current_state = sd;
 347   sim_cpu *current_cpu = STATE_CPU (sd, 0);
 348   SCACHE cache[MAX_LIW_INSNS];
 349   SCACHE *sc = &cache[0];
 350 ${parallel+  int icount = 0;}
 351
 352 EOF
 353
 354 # Any initialization code before looping starts.
 355 # Note that this code may declare some locals.
 356 ${SHELL} $file init
 357
 358 if [ x$parallel = xyes ] ; then
 359 cat << EOF
 360
 361 #if defined (HAVE_PARALLEL_EXEC) && defined (__GNUC__)
 362   {
 363     static read_init_p = 0;
 364     if (! read_init_p)
 365       {
 366 /* ??? Later maybe paste read.c in when building mainloop.c.  */
 367 #define DEFINE_LABELS
 368 #include "readx.c"
 369         read_init_p = 1;
 370       }
 371   }
 372 #endif
 373
 374 EOF
 375 fi
 376
 377 cat <<EOF
 378
 379   do
 380     {
 381       /* FIXME: Later check every insn for events and such.  */
 382
 383       SIM_PRE_EXEC_HOOK (current_cpu);
 384
 385       {
 386 /* begin full-{extract,exec}-noscache */
 387 EOF
 388
 389 ${SHELL} $file full-extract-noscache
 390 echo ""
 391 ${SHELL} $file full-exec-noscache
 392
 393 cat <<EOF
 394 /* end full-{extract,exec}-noscache */
 395       }
 396
 397       SIM_POST_EXEC_HOOK (current_cpu);
 398
 399       ++insn_count;
 400     }
 401   while (keep_running);
 402 #undef FAST_P
 403 }
 404
 405 EOF
 406 fi # ! WITH_SCACHE
 407
 408 ##########################################################################
 409
 410 if [ x$fast = xyes ] ; then
 411     if [ x$scache = xyes ] ; then
 412         cat <<EOF
 413
 414 static void
 415 engine_resume_fast (SIM_DESC sd)
 416 {
 417 #define FAST_P 1
 418   SIM_DESC current_state = sd;
 419   sim_cpu *current_cpu = STATE_CPU (sd, 0);
 420 ${parallel+  int icount = 0;}
 421
 422 EOF
 423
 424 # Any initialization code before looping starts.
 425 # Note that this code may declare some locals.
 426 ${SHELL} $file init
 427
 428 if [ x$parallel = xyes ] ; then
 429 cat << EOF
 430
 431 #if defined (HAVE_PARALLEL_EXEC) && defined (__GNUC__)
 432   {
 433     static read_init_p = 0;
 434     if (! read_init_p)
 435       {
 436 /* ??? Later maybe paste read.c in when building mainloop.c.  */
 437 #define DEFINE_LABELS
 438 #include "readx.c"
 439         read_init_p = 1;
 440       }
 441   }
 442 #endif
 443
 444 EOF
 445 fi
 446
 447 cat <<EOF
 448
 449 #if defined (WITH_SEM_SWITCH_FAST) && defined (__GNUC__)
 450   {
 451     static decode_init_p = 0;
 452     if (! decode_init_p)
 453       {
 454 /* ??? Later maybe paste sem-switch.c in when building mainloop.c.  */
 455 #define DEFINE_LABELS
 456 #include "sem-switch.c"
 457         decode_init_p = 1;
 458       }
 459   }
 460 #endif
 461
 462   do
 463     {
 464       {
 465         unsigned int hash;
 466         SCACHE *sc;
 467         PCADDR pc = PC;
 468
 469         /* First step: look up current insn in hash table.  */
 470         hash = SCACHE_HASH_PC (sd, pc);
 471         sc = CPU_SCACHE_CACHE (current_cpu) + hash;
 472
 473         /* If the entry isn't the one we want (cache miss),
 474            fetch and decode the instruction.  */
 475         if (sc->argbuf.addr != pc)
 476           {
 477             insn_t insn;
 478
 479 /* begin fast-extract-scache */
 480 EOF
 481
 482 ${SHELL} $file fast-extract-scache
 483
 484 cat <<EOF
 485 /* end fast-extract-scache */
 486           }
 487
 488 /* begin fast-exec-scache */
 489 EOF
 490
 491 ${SHELL} $file fast-exec-scache
 492
 493 cat <<EOF
 494 /* end fast-exec-scache */
 495
 496       }
 497
 498       ++insn_count;
 499     }
 500   while (keep_running);
 501 #undef FAST_P
 502 }
 503
 504 EOF
 505
 506 ##########################################################################
 507
 508 else # ! WITH_SCACHE
 509         cat <<EOF
 510
 511 static void
 512 engine_resume_fast (SIM_DESC sd)
 513 {
 514 #define FAST_P 1
 515   SIM_DESC current_state = sd;
 516   sim_cpu *current_cpu = STATE_CPU (sd, 0);
 517   SCACHE cache[MAX_LIW_INSNS];
 518   SCACHE *sc = &cache[0];
 519 ${parallel+  int icount = 0;}
 520
 521 EOF
 522
 523 # Any initialization code before looping starts.
 524 # Note that this code may declare some locals.
 525 ${SHELL} $file init
 526
 527 if [ x$parallel = xyes ] ; then
 528 cat << EOF
 529
 530 #if defined (HAVE_PARALLEL_EXEC) && defined (__GNUC__)
 531   {
 532     static read_init_p = 0;
 533     if (! read_init_p)
 534       {
 535 /* ??? Later maybe paste read.c in when building mainloop.c.  */
 536 #define DEFINE_LABELS
 537 #include "readx.c"
 538         read_init_p = 1;
 539       }
 540   }
 541 #endif
 542
 543 EOF
 544 fi
 545
 546 cat <<EOF
 547
 548   do
 549     {
 550 /* begin fast-{extract,exec}-noscache */
 551 EOF
 552
 553 ${SHELL} $file fast-extract-noscache
 554 echo ""
 555 ${SHELL} $file fast-exec-noscache
 556
 557 cat <<EOF
 558 /* end fast-{extract,exec}-noscache */
 559
 560       ++insn_count;
 561     }
 562   while (keep_running);
 563 #undef FAST_P
 564 }
 565
 566 EOF
 567
 568     fi # ! WITH_SCACHE
 569 fi # -fast