sim/or1k/mloop.in

   1 # Simulator main loop for or1k. -*- C -*-
   2 #
   3 # Copyright (C) 2017-2020 Free Software Foundation, Inc.
   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 # Syntax:
  21 # /bin/sh mainloop.in command
  22 #
  23 # Command is one of:
  24 #
  25 # init
  26 # support
  27 # extract-{simple,scache,pbb}
  28 # {full,fast}-exec-{simple,scache,pbb}
  29 #
  30 # A target need only provide a "full" version of one of simple,scache,pbb.
  31 # If the target wants it can also provide a fast version of same, or if
  32 # the slow (full featured) version is `simple', then the fast version can be
  33 # one of scache/pbb.
  34 # A target can't provide more than this.
  35 # However for illustration's sake this file 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
  46 static INLINE const IDESC *
  47 extract (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn,
  48          ARGBUF *abuf, int fast_p)
  49 {
  50   const IDESC *id = @cpu@_decode (current_cpu, pc, insn, insn, abuf);
  51   @cpu@_fill_argbuf (current_cpu, abuf, id, pc, fast_p);
  52   if (!fast_p)
  53     {
  54       int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
  55       int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
  56       @cpu@_fill_argbuf_tp (current_cpu, abuf, trace_p, profile_p);
  57     }
  58   return id;
  59 }
  60
  61 static INLINE SEM_PC
  62 execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p)
  63 {
  64   SEM_PC vpc = sc;
  65
  66   @cpu@_insn_before (current_cpu, vpc, sc->argbuf.idesc);
  67
  68   if (fast_p)
  69     {
  70 #if ! WITH_SEM_SWITCH_FAST
  71 #if WITH_SCACHE
  72       vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, sc);
  73 #else
  74       vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, &sc->argbuf);
  75 #endif
  76 #else
  77       abort ();
  78 #endif /* WITH_SEM_SWITCH_FAST */
  79     }
  80   else
  81     {
  82 #if ! WITH_SEM_SWITCH_FULL
  83       ARGBUF *abuf = &sc->argbuf;
  84       const IDESC *idesc = abuf->idesc;
  85       const CGEN_INSN *idata = idesc->idata;
  86 #if WITH_SCACHE_PBB
  87       int virtual_p = CGEN_INSN_ATTR_VALUE (idata, CGEN_INSN_VIRTUAL);
  88 #else
  89       int virtual_p = 0;
  90 #endif
  91
  92       if (! virtual_p)
  93         {
  94           /* FIXME: call x-before */
  95           if (ARGBUF_PROFILE_P (abuf))
  96             PROFILE_COUNT_INSN (current_cpu, abuf->addr, idesc->num);
  97           /* FIXME: Later make cover macros: PROFILE_INSN_{INIT,FINI}.  */
  98           if (PROFILE_MODEL_P (current_cpu)
  99               && ARGBUF_PROFILE_P (abuf))
 100             @cpu@_model_insn_before (current_cpu, 1 /*first_p*/);
 101           CGEN_TRACE_INSN_INIT (current_cpu, abuf, 1);
 102           CGEN_TRACE_INSN (current_cpu, idata,
 103                       (const struct argbuf *) abuf, abuf->addr);
 104         }
 105 #if WITH_SCACHE
 106       vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, sc);
 107 #else
 108       vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, abuf);
 109 #endif
 110       if (! virtual_p)
 111         {
 112           /* FIXME: call x-after */
 113           if (PROFILE_MODEL_P (current_cpu)
 114               && ARGBUF_PROFILE_P (abuf))
 115             {
 116               int cycles;
 117
 118               cycles = (*idesc->timing->model_fn) (current_cpu, sc);
 119               @cpu@_model_insn_after (current_cpu, 1 /*last_p*/, cycles);
 120             }
 121           CGEN_TRACE_INSN_FINI (current_cpu, abuf, 1);
 122         }
 123 #else
 124       abort ();
 125 #endif /* WITH_SEM_SWITCH_FULL */
 126     }
 127
 128   @cpu@_insn_after (current_cpu, vpc, sc->argbuf.idesc);
 129
 130   return vpc;
 131 }
 132
 133 EOF
 134
 135 ;;
 136
 137 xinit)
 138
 139 # Nothing needed.
 140
 141 ;;
 142
 143 xextract-simple | xextract-scache)
 144
 145 cat <<EOF
 146 {
 147   USI insn = GETIMEMUSI (current_cpu, pc);
 148   extract (current_cpu, pc, insn, sc, FAST_P);
 149   SEM_SKIP_COMPILE (current_cpu, sc, 1);
 150 }
 151 EOF
 152
 153 ;;
 154
 155 xextract-pbb)
 156
 157 # Inputs:  current_cpu, pc, sc, max_insns, FAST_P
 158 # Outputs: sc, pc
 159 # sc must be left pointing past the last created entry.
 160 # pc must be left pointing past the last created entry.
 161 # If the pbb is terminated by a cti insn, SET_CTI_VPC(sc) must be called
 162 # to record the vpc of the cti insn.
 163 # SET_INSN_COUNT(n) must be called to record number of real insns.
 164
 165 cat <<EOF
 166 {
 167   const IDESC *idesc;
 168   int icount = 0;
 169
 170   while (max_insns > 0) {
 171
 172     USI insn = GETIMEMUSI (current_cpu, pc);
 173
 174     idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
 175
 176     SEM_SKIP_COMPILE (current_cpu, sc, 1);
 177
 178     ++sc;
 179     --max_insns;
 180     ++icount;
 181     pc += 4;
 182
 183     if (CGEN_ATTR_BOOLS (CGEN_INSN_ATTRS ((idesc)->idata)) & CGEN_ATTR_MASK (CGEN_INSN_FORCED_CTI))
 184       {
 185
 186         SET_CTI_VPC (sc - 1);
 187
 188         break;
 189
 190       }
 191     else if (CGEN_ATTR_BOOLS (CGEN_INSN_ATTRS ((idesc)->idata)) & CGEN_ATTR_MASK (CGEN_INSN_DELAYED_CTI))
 192       {
 193
 194         /* handle delay slot */
 195         SET_CTI_VPC (sc - 1);
 196
 197         insn = GETIMEMUSI (current_cpu, pc);
 198
 199         idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
 200
 201         ++sc;
 202         --max_insns;
 203         ++icount;
 204         pc += 4;
 205
 206         break;
 207       }
 208   }
 209
 210   SET_INSN_COUNT (icount);
 211
 212 }
 213 EOF
 214
 215 ;;
 216
 217 xfull-exec-* | xfast-exec-*)
 218
 219 # Inputs: current_cpu, vpc, FAST_P
 220 # Outputs: vpc
 221 # vpc is the virtual program counter.
 222
 223 cat <<EOF
 224 #if (! FAST_P && WITH_SEM_SWITCH_FULL) || (FAST_P && WITH_SEM_SWITCH_FAST)
 225 #define DEFINE_SWITCH
 226 #ifdef WANT_CPU_OR1K32BF
 227 #include "sem-switch.c"
 228 #endif
 229 #else
 230   vpc = execute (current_cpu, vpc, FAST_P);
 231 #endif
 232 EOF
 233
 234 ;;
 235
 236 *)
 237   echo "Invalid argument to mainloop.in: $1" >&2
 238   exit 1
 239   ;;
 240
 241 esac