sim/cris/mloop.in

   1 # Simulator main loop for CRIS. -*- C -*-
   2 # Copyright (C) 2004-2024 Free Software Foundation, Inc.
   3 # Contributed by Axis Communications.
   4 #
   5 # This file is part of the GNU simulators.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 # Based on the fr30 file.
  21
  22 # Syntax:
  23 # /bin/sh mainloop.in command
  24 #
  25 # Command is one of:
  26 #
  27 # init
  28 # support
  29 # extract-{simple,scache,pbb}
  30 # {full,fast}-exec-{simple,scache,pbb}
  31 #
  32 # A target need only provide a "full" version of one of simple,scache,pbb.
  33 # If the target wants it can also provide a fast version of same.
  34 # It can't provide more than this, however for illustration's sake the CRIS
  35 # port provides examples of all.
  36
  37 # ??? After a few more ports are done, revisit.
  38 # Will eventually need to machine generate a lot of this.
  39
  40 case "x$1" in
  41
  42 xsupport)
  43
  44 cat <<EOF
  45 #line $LINENO "$0"
  46 #include <stdlib.h>
  47
  48 /* It seems we don't have a templated header file corresponding to
  49    cris-tmpl.c, so we have to get out declarations the hackish way.  */
  50 extern void @cpu@_specific_init (SIM_CPU *current_cpu);
  51
  52 static INLINE const IDESC *
  53 extract (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn, ARGBUF *abuf,
  54          int fast_p)
  55 {
  56   const IDESC *id = @cpu@_decode (current_cpu, pc, insn,
  57 #if CGEN_INT_INSN_P
  58                                   insn,
  59 #endif
  60                                   abuf);
  61   @cpu@_fill_argbuf (current_cpu, abuf, id, pc, fast_p);
  62   if (! fast_p)
  63     {
  64       int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
  65       int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
  66       @cpu@_fill_argbuf_tp (current_cpu, abuf, trace_p, profile_p);
  67     }
  68   return id;
  69 }
  70
  71 /* This might not be used directly depending on the fast compile mode.  */
  72 ATTRIBUTE_UNUSED static INLINE SEM_PC
  73 execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p)
  74 {
  75   SEM_PC vpc;
  76
  77   if (fast_p)
  78     {
  79 #if ! WITH_SEM_SWITCH_FAST
  80 #if WITH_SCACHE
  81       vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, sc);
  82 #else
  83       vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, &sc->argbuf);
  84 #endif
  85 #else
  86       abort ();
  87 #endif /* WITH_SEM_SWITCH_FAST */
  88     }
  89   else
  90     {
  91 #if ! WITH_SEM_SWITCH_FULL
  92       ARGBUF *abuf = &sc->argbuf;
  93       const IDESC *idesc = abuf->idesc;
  94 #if WITH_SCACHE_PBB
  95       int virtual_p = CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_VIRTUAL);
  96 #else
  97       int virtual_p = 0;
  98 #endif
  99
 100       if (! virtual_p)
 101         {
 102           /* FIXME: call x-before */
 103           if (ARGBUF_PROFILE_P (abuf))
 104             PROFILE_COUNT_INSN (current_cpu, abuf->addr, idesc->num);
 105           /* FIXME: Later make cover macros: PROFILE_INSN_{INIT,FINI}.  */
 106           if (PROFILE_MODEL_P (current_cpu)
 107               && ARGBUF_PROFILE_P (abuf))
 108             @cpu@_model_insn_before (current_cpu, 1 /*first_p*/);
 109           CGEN_TRACE_INSN_INIT (current_cpu, abuf, 1);
 110           CGEN_TRACE_INSN (current_cpu, idesc->idata,
 111                       (const struct argbuf *) abuf, abuf->addr);
 112         }
 113 #if WITH_SCACHE
 114       vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, sc);
 115 #else
 116       vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, abuf);
 117 #endif
 118       if (! virtual_p)
 119         {
 120           /* FIXME: call x-after */
 121           if (PROFILE_MODEL_P (current_cpu)
 122               && ARGBUF_PROFILE_P (abuf))
 123             {
 124               int cycles;
 125
 126               cycles = (*idesc->timing->model_fn) (current_cpu, sc);
 127               @cpu@_model_insn_after (current_cpu, 1 /*last_p*/, cycles);
 128             }
 129           CGEN_TRACE_INSN_FINI (current_cpu, abuf, 1);
 130         }
 131 #else
 132       abort ();
 133 #endif /* WITH_SEM_SWITCH_FULL */
 134     }
 135
 136   return vpc;
 137 }
 138
 139 EOF
 140
 141 ;;
 142
 143 xinit)
 144
 145 cat <<EOF
 146 #line $LINENO "$0"
 147   /* This seemed the only sane location to emit a call to a
 148      model-specific init function.  It may not work for all simulator
 149      types.  FIXME: Introduce a model-init hook.  */
 150
 151   /* We use the same condition as the code that's expected to follow, so
 152      GCC can consolidate the code with only one conditional.  */
 153   if (! CPU_IDESC_SEM_INIT_P (current_cpu))
 154     @cpu@_specific_init (current_cpu);
 155 EOF
 156
 157 ;;
 158
 159 xextract-simple | xextract-scache)
 160
 161 # Inputs:  current_cpu, vpc, sc, FAST_P
 162 # Outputs: sc filled in
 163
 164 cat <<EOF
 165 #line $LINENO "$0"
 166 {
 167   CGEN_INSN_INT insn = GETIMEMUHI (current_cpu, vpc);
 168   extract (current_cpu, vpc, insn, SEM_ARGBUF (sc), FAST_P);
 169 }
 170 EOF
 171
 172 ;;
 173
 174 xextract-pbb)
 175
 176 # Inputs:  current_cpu, pc, sc, max_insns, FAST_P
 177 # Outputs: sc, pc
 178 # sc must be left pointing past the last created entry.
 179 # pc must be left pointing past the last created entry.
 180 # If the pbb is terminated by a cti insn, SET_CTI_VPC(sc) must be called
 181 # to record the vpc of the cti insn.
 182 # SET_INSN_COUNT(n) must be called to record number of real insns.
 183
 184 cat <<EOF
 185 #line $LINENO "$0"
 186 {
 187   const IDESC *idesc;
 188   int icount = 0;
 189
 190   /* Make sure the buffer doesn't overflow for profiled insns if
 191      max_insns happens to not be a multiple of 3.  */
 192   if (!FAST_P)
 193      max_insns -= 2 + 3;
 194   else
 195      /* There might be two real insns handled per loop.  */
 196      max_insns--;
 197
 198   while (max_insns > 0)
 199     {
 200       UHI insn = GETIMEMUHI (current_cpu, pc);
 201       int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
 202       int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
 203       int befaft_p = profile_p || trace_p;
 204
 205       if (befaft_p)
 206         {
 207           @cpu@_emit_before (current_cpu, sc, pc, 1);
 208           ++sc;
 209           sc->argbuf.trace_p = trace_p;
 210           sc->argbuf.profile_p = profile_p;
 211           --max_insns;
 212         }
 213
 214       idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
 215       ++sc;
 216       --max_insns;
 217       ++icount;
 218
 219       if (befaft_p)
 220         {
 221           @cpu@_emit_after (current_cpu, sc, pc);
 222           ++sc;
 223           --max_insns;
 224         }
 225
 226       pc += idesc->length;
 227
 228       if (IDESC_CTI_P (idesc))
 229         {
 230           SET_CTI_VPC (sc - 1);
 231
 232           /* Delay slot?  Ignore for zero-instructions (bcc .+2) since
 233              those are treated as exit insns to avoid runaway sessions
 234              for invalid programs.  */
 235           if (insn != 0 && CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_DELAY_SLOT))
 236             {
 237               trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
 238               profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
 239               befaft_p = profile_p || trace_p;
 240
 241               if (befaft_p)
 242                 {
 243                   @cpu@_emit_before (current_cpu, sc, pc, 1);
 244                   ++sc;
 245                   sc->argbuf.trace_p = trace_p;
 246                   sc->argbuf.profile_p = profile_p;
 247                   --max_insns;
 248                 }
 249
 250               insn = GETIMEMUHI (current_cpu, pc);
 251               idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
 252               ++sc;
 253               --max_insns;
 254               ++icount;
 255
 256               if (befaft_p)
 257                 {
 258                   @cpu@_emit_after (current_cpu, sc, pc);
 259                   ++sc;
 260                   --max_insns;
 261                 }
 262               pc += idesc->length;
 263             }
 264           break;
 265         }
 266     }
 267
 268  Finish:
 269   SET_INSN_COUNT (icount);
 270 }
 271 EOF
 272
 273 ;;
 274
 275 xfull-exec-* | xfast-exec-*)
 276
 277 # Inputs: current_cpu, sc, FAST_P
 278 # Outputs: vpc
 279 # vpc contains the address of the next insn to execute
 280
 281 cat <<EOF
 282 #line $LINENO "$0"
 283 {
 284 #if (! FAST_P && WITH_SEM_SWITCH_FULL) || (FAST_P && WITH_SEM_SWITCH_FAST)
 285 #define DEFINE_SWITCH
 286 #include "sem@cpu@-switch.c"
 287 #else
 288   vpc = execute (current_cpu, vpc, FAST_P);
 289 #endif
 290 }
 291 EOF
 292
 293 ;;
 294
 295 *)
 296   echo "Invalid argument to mainloop.in: $1" >&2
 297   exit 1
 298   ;;
 299
 300 esac