sim/cris/mloop.in

   1 # Simulator main loop for CRIS. -*- C -*-
   2 # Copyright (C) 2004-2022 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 #include <stdlib.h>
  46
  47 /* It seems we don't have a templated header file corresponding to
  48    cris-tmpl.c, so we have to get out declarations the hackish way.  */
  49 extern void @cpu@_specific_init (SIM_CPU *current_cpu);
  50
  51 static INLINE const IDESC *
  52 extract (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn, ARGBUF *abuf,
  53          int fast_p)
  54 {
  55   const IDESC *id = @cpu@_decode (current_cpu, pc, insn,
  56 #if CGEN_INT_INSN_P
  57                                   insn,
  58 #endif
  59                                   abuf);
  60   @cpu@_fill_argbuf (current_cpu, abuf, id, pc, fast_p);
  61   if (! fast_p)
  62     {
  63       int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
  64       int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
  65       @cpu@_fill_argbuf_tp (current_cpu, abuf, trace_p, profile_p);
  66     }
  67   return id;
  68 }
  69
  70 /* This might not be used directly depending on the fast compile mode.  */
  71 ATTRIBUTE_UNUSED static INLINE SEM_PC
  72 execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p)
  73 {
  74   SEM_PC vpc;
  75
  76   if (fast_p)
  77     {
  78 #if ! WITH_SEM_SWITCH_FAST
  79 #if WITH_SCACHE
  80       vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, sc);
  81 #else
  82       vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, &sc->argbuf);
  83 #endif
  84 #else
  85       abort ();
  86 #endif /* WITH_SEM_SWITCH_FAST */
  87     }
  88   else
  89     {
  90 #if ! WITH_SEM_SWITCH_FULL
  91       ARGBUF *abuf = &sc->argbuf;
  92       const IDESC *idesc = abuf->idesc;
  93 #if WITH_SCACHE_PBB
  94       int virtual_p = CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_VIRTUAL);
  95 #else
  96       int virtual_p = 0;
  97 #endif
  98
  99       if (! virtual_p)
 100         {
 101           /* FIXME: call x-before */
 102           if (ARGBUF_PROFILE_P (abuf))
 103             PROFILE_COUNT_INSN (current_cpu, abuf->addr, idesc->num);
 104           /* FIXME: Later make cover macros: PROFILE_INSN_{INIT,FINI}.  */
 105           if (PROFILE_MODEL_P (current_cpu)
 106               && ARGBUF_PROFILE_P (abuf))
 107             @cpu@_model_insn_before (current_cpu, 1 /*first_p*/);
 108           CGEN_TRACE_INSN_INIT (current_cpu, abuf, 1);
 109           CGEN_TRACE_INSN (current_cpu, idesc->idata,
 110                       (const struct argbuf *) abuf, abuf->addr);
 111         }
 112 #if WITH_SCACHE
 113       vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, sc);
 114 #else
 115       vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, abuf);
 116 #endif
 117       if (! virtual_p)
 118         {
 119           /* FIXME: call x-after */
 120           if (PROFILE_MODEL_P (current_cpu)
 121               && ARGBUF_PROFILE_P (abuf))
 122             {
 123               int cycles;
 124
 125               cycles = (*idesc->timing->model_fn) (current_cpu, sc);
 126               @cpu@_model_insn_after (current_cpu, 1 /*last_p*/, cycles);
 127             }
 128           CGEN_TRACE_INSN_FINI (current_cpu, abuf, 1);
 129         }
 130 #else
 131       abort ();
 132 #endif /* WITH_SEM_SWITCH_FULL */
 133     }
 134
 135   return vpc;
 136 }
 137
 138 EOF
 139
 140 ;;
 141
 142 xinit)
 143
 144 cat <<EOF
 145   /* This seemed the only sane location to emit a call to a
 146      model-specific init function.  It may not work for all simulator
 147      types.  FIXME: Introduce a model-init hook.  */
 148
 149   /* We use the same condition as the code that's expected to follow, so
 150      GCC can consolidate the code with only one conditional.  */
 151   if (! CPU_IDESC_SEM_INIT_P (current_cpu))
 152     @cpu@_specific_init (current_cpu);
 153 EOF
 154
 155 ;;
 156
 157 xextract-simple | xextract-scache)
 158
 159 # Inputs:  current_cpu, vpc, sc, FAST_P
 160 # Outputs: sc filled in
 161
 162 cat <<EOF
 163 {
 164   CGEN_INSN_INT insn = GETIMEMUHI (current_cpu, vpc);
 165   extract (current_cpu, vpc, insn, SEM_ARGBUF (sc), FAST_P);
 166 }
 167 EOF
 168
 169 ;;
 170
 171 xextract-pbb)
 172
 173 # Inputs:  current_cpu, pc, sc, max_insns, FAST_P
 174 # Outputs: sc, pc
 175 # sc must be left pointing past the last created entry.
 176 # pc must be left pointing past the last created entry.
 177 # If the pbb is terminated by a cti insn, SET_CTI_VPC(sc) must be called
 178 # to record the vpc of the cti insn.
 179 # SET_INSN_COUNT(n) must be called to record number of real insns.
 180
 181 cat <<EOF
 182 {
 183   const IDESC *idesc;
 184   int icount = 0;
 185
 186   /* Make sure the buffer doesn't overflow for profiled insns if
 187      max_insns happens to not be a multiple of 3.  */
 188   if (!FAST_P)
 189      max_insns -= 2 + 3;
 190   else
 191      /* There might be two real insns handled per loop.  */
 192      max_insns--;
 193
 194   while (max_insns > 0)
 195     {
 196       UHI insn = GETIMEMUHI (current_cpu, pc);
 197       int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
 198       int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
 199       int befaft_p = profile_p || trace_p;
 200
 201       if (befaft_p)
 202         {
 203           @cpu@_emit_before (current_cpu, sc, pc, 1);
 204           ++sc;
 205           sc->argbuf.trace_p = trace_p;
 206           sc->argbuf.profile_p = profile_p;
 207           --max_insns;
 208         }
 209
 210       idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
 211       ++sc;
 212       --max_insns;
 213       ++icount;
 214
 215       if (befaft_p)
 216         {
 217           @cpu@_emit_after (current_cpu, sc, pc);
 218           ++sc;
 219           --max_insns;
 220         }
 221
 222       pc += idesc->length;
 223
 224       if (IDESC_CTI_P (idesc))
 225         {
 226           SET_CTI_VPC (sc - 1);
 227
 228           /* Delay slot?  Ignore for zero-instructions (bcc .+2) since
 229              those are treated as exit insns to avoid runaway sessions
 230              for invalid programs.  */
 231           if (insn != 0 && CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_DELAY_SLOT))
 232             {
 233               UHI insn;
 234               trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
 235               profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
 236               befaft_p = profile_p || trace_p;
 237
 238               if (befaft_p)
 239                 {
 240                   @cpu@_emit_before (current_cpu, sc, pc, 1);
 241                   ++sc;
 242                   sc->argbuf.trace_p = trace_p;
 243                   sc->argbuf.profile_p = profile_p;
 244                   --max_insns;
 245                 }
 246
 247               insn = GETIMEMUHI (current_cpu, pc);
 248               idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
 249               ++sc;
 250               --max_insns;
 251               ++icount;
 252
 253               if (befaft_p)
 254                 {
 255                   @cpu@_emit_after (current_cpu, sc, pc);
 256                   ++sc;
 257                   --max_insns;
 258                 }
 259               pc += idesc->length;
 260             }
 261           break;
 262         }
 263     }
 264
 265  Finish:
 266   SET_INSN_COUNT (icount);
 267 }
 268 EOF
 269
 270 ;;
 271
 272 xfull-exec-* | xfast-exec-*)
 273
 274 # Inputs: current_cpu, sc, FAST_P
 275 # Outputs: vpc
 276 # vpc contains the address of the next insn to execute
 277
 278 cat <<EOF
 279 {
 280 #if (! FAST_P && WITH_SEM_SWITCH_FULL) || (FAST_P && WITH_SEM_SWITCH_FAST)
 281 #define DEFINE_SWITCH
 282 #include "sem@cpu@-switch.c"
 283 #else
 284   vpc = execute (current_cpu, vpc, FAST_P);
 285 #endif
 286 }
 287 EOF
 288
 289 ;;
 290
 291 *)
 292   echo "Invalid argument to mainloop.in: $1" >&2
 293   exit 1
 294   ;;
 295
 296 esac