sim/lm32/mloop.in

   1 # Simulator main loop for lm32. -*- C -*-
   2 # Contributed by Jon Beniston <jon@beniston.com>
   3 #
   4 # This file is part of the GNU Simulators.
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3, or (at your option)
   9 # any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License along
  17 # with this program; if not, see <http://www.gnu.org/licenses/>.
  18
  19 # Syntax:
  20 # /bin/sh mainloop.in command
  21 #
  22 # Command is one of:
  23 #
  24 # init
  25 # support
  26 # extract-{simple,scache,pbb}
  27 # {full,fast}-exec-{simple,scache,pbb}
  28 #
  29
  30 case "x$1" in
  31
  32 xsupport)
  33
  34 cat <<EOF
  35
  36 static INLINE const IDESC *
  37 extract (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn,
  38            ARGBUF *abuf, int fast_p)
  39 {
  40   const IDESC *id = @cpu@_decode (current_cpu, pc, insn, insn, abuf);
  41
  42   @cpu@_fill_argbuf (current_cpu, abuf, id, pc, fast_p);
  43   if (! fast_p)
  44     {
  45       int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
  46       int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
  47       @cpu@_fill_argbuf_tp (current_cpu, abuf, trace_p, profile_p);
  48     }
  49   return id;
  50 }
  51
  52 static INLINE SEM_PC
  53 execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p)
  54 {
  55   SEM_PC vpc;
  56
  57   if (fast_p)
  58     {
  59 #if ! WITH_SEM_SWITCH_FAST
  60 #if WITH_SCACHE
  61       vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, sc);
  62 #else
  63       vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, &sc->argbuf);
  64 #endif
  65 #else
  66       abort ();
  67 #endif /* WITH_SEM_SWITCH_FAST */
  68     }
  69   else
  70     {
  71 #if ! WITH_SEM_SWITCH_FULL
  72       ARGBUF *abuf = &sc->argbuf;
  73       const IDESC *idesc = abuf->idesc;
  74       const CGEN_INSN *idata = idesc->idata;
  75 #if WITH_SCACHE_PBB
  76       int virtual_p = CGEN_INSN_ATTR_VALUE (idata, CGEN_INSN_VIRTUAL);
  77 #else
  78       int virtual_p = 0;
  79 #endif
  80       if (! virtual_p)
  81         {
  82           /* FIXME: call x-before */
  83           if (ARGBUF_PROFILE_P (abuf))
  84             PROFILE_COUNT_INSN (current_cpu, abuf->addr, idesc->num);
  85           /* FIXME: Later make cover macros: PROFILE_INSN_{INIT,FINI}.  */
  86           if (PROFILE_MODEL_P (current_cpu)
  87               && ARGBUF_PROFILE_P (abuf))
  88             @cpu@_model_insn_before (current_cpu, 1 /*first_p*/);
  89           CGEN_TRACE_INSN_INIT (current_cpu, abuf, 1);
  90           CGEN_TRACE_INSN (current_cpu, idata,
  91                       (const struct argbuf *) abuf, abuf->addr);
  92         }
  93 #if WITH_SCACHE
  94       vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, sc);
  95 #else
  96       vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, abuf);
  97 #endif
  98       if (! virtual_p)
  99         {
 100           /* FIXME: call x-after */
 101           if (PROFILE_MODEL_P (current_cpu)
 102               && ARGBUF_PROFILE_P (abuf))
 103             {
 104               int cycles;
 105
 106               cycles = (*idesc->timing->model_fn) (current_cpu, sc);
 107               @cpu@_model_insn_after (current_cpu, 1 /*last_p*/, cycles);
 108             }
 109           CGEN_TRACE_INSN_FINI (current_cpu, abuf, 1);
 110         }
 111 #else
 112       abort ();
 113 #endif /* WITH_SEM_SWITCH_FULL */
 114     }
 115
 116   return vpc;
 117 }
 118
 119 EOF
 120
 121 ;;
 122
 123 xinit)
 124
 125 # Nothing needed.
 126
 127 ;;
 128
 129 xextract-simple | xextract-scache)
 130
 131 cat <<EOF
 132 {
 133   CGEN_INSN_INT insn = GETIMEMUSI (current_cpu, vpc);
 134   extract (current_cpu, vpc, insn, SEM_ARGBUF (sc), FAST_P);
 135 }
 136 EOF
 137
 138 ;;
 139
 140 xextract-pbb)
 141
 142 # Inputs:  current_cpu, pc, sc, max_insns, FAST_P
 143 # Outputs: sc, pc
 144 # sc must be left pointing past the last created entry.
 145 # pc must be left pointing past the last created entry.
 146 # If the pbb is terminated by a cti insn, SET_CTI_VPC(sc) must be called
 147 # to record the vpc of the cti insn.
 148 # SET_INSN_COUNT(n) must be called to record number of real insns.
 149
 150 cat <<EOF
 151 {
 152   const IDESC *idesc;
 153   int icount = 0;
 154
 155   while (max_insns > 0)
 156     {
 157       USI insn = GETIMEMUSI (current_cpu, pc);
 158
 159       idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
 160       ++sc;
 161       --max_insns;
 162       ++icount;
 163       pc += idesc->length;
 164
 165       if (IDESC_CTI_P (idesc))
 166         {
 167           SET_CTI_VPC (sc - 1);
 168           break;
 169         }
 170     }
 171
 172  Finish:
 173   SET_INSN_COUNT (icount);
 174 }
 175 EOF
 176
 177 ;;
 178
 179 xfull-exec-* | xfast-exec-*)
 180
 181 # Inputs: current_cpu, vpc, FAST_P
 182 # Outputs: vpc
 183
 184 cat <<EOF
 185   /* Update cycle counter */
 186   SET_H_CSR (LM32_CSR_CC, GET_H_CSR (LM32_CSR_CC) + 1);
 187 #if (! FAST_P && WITH_SEM_SWITCH_FULL) || (FAST_P && WITH_SEM_SWITCH_FAST)
 188 #define DEFINE_SWITCH
 189 #include "sem-switch.c"
 190 #else
 191   vpc = execute (current_cpu, vpc, FAST_P);
 192 #endif
 193 EOF
 194
 195 ;;
 196
 197 *)
 198   echo "Invalid argument to mainloop.in: $1" >&2
 199   exit 1
 200   ;;
 201
 202 esac