old-cross-binutils/sim/m32r/mloop.in

# Simulator main loop for m32r. -*- C -*-
# Copyright (C) 1996, 1997 Free Software Foundation, Inc.
#
# This file is part of the GNU Simulators.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

# Syntax:
# /bin/sh mainloop.in init|support|{full,fast}-{extract,exec}-{scache,noscache}

# ??? After a few more ports are done, revisit.
# Will eventually need to machine generate a lot of this.

case "x$1" in

xsupport)

cat <<EOF

static INLINE void
extract16 (SIM_CPU *current_cpu, PCADDR pc, insn_t insn,
	   SCACHE *sc, int fast_p)
{
  const IDESC *d = @cpu@_decode (current_cpu, pc, insn);
  (*d->extract) (current_cpu, pc, insn, &sc->argbuf);
  if (fast_p)
    {
#if WITH_SEM_SWITCH_FAST
#ifdef __GNUC__
      sc->semantic.sem_case = d->sem_fast_lab;
#else
      sc->semantic.sem_case = d->num;
#endif
#else
      sc->semantic.sem_fast = d->sem_fast;
#endif
    }
  else
    {
      sc->semantic.sem_full = d->sem_full;
    }
  sc->argbuf.idesc = d;
  sc->next = pc + 2;
}

static INLINE void
extract32 (SIM_CPU *current_cpu, PCADDR pc, insn_t insn,
	   SCACHE *sc, int fast_p)
{
  const IDESC *d = @cpu@_decode (current_cpu, pc, (USI) insn >> 16);
  (*d->extract) (current_cpu, pc, insn, &sc->argbuf);
  if (fast_p)
    {
#if WITH_SEM_SWITCH_FAST
#ifdef __GNUC__
      sc->semantic.sem_case = d->sem_fast_lab;
#else
      sc->semantic.sem_case = d->num;
#endif
#else
      sc->semantic.sem_fast_fn = d->sem_fast;
#endif
    }
  else
    {
      sc->semantic.sem_full = d->sem_full;
    }
  sc->argbuf.idesc = d;
  sc->next = pc + 4;
}

static INLINE PCADDR
execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p)
{
  PCADDR pc;

  if (fast_p)
    {
#if WITH_SCACHE && ! WITH_SEM_SWITCH_FAST
      pc = (*sc->semantic.sem_fast) (current_cpu, sc);
#else
#if 0
      pc = (*sc->semantic.sem_full) (current_cpu, &sc->argbuf);
#else
      pc = (*sc->semantic.sem_full) (current_cpu, sc);
#endif
#endif
    }
  else
    {
      m32r_model_init_insn_cycles (current_cpu, 1);
      TRACE_INSN_INIT (current_cpu, 1);
      TRACE_INSN (current_cpu, sc->argbuf.idesc->opcode, (const struct argbuf *) &sc->argbuf, sc->argbuf.addr);
#if 0
      pc = (*sc->semantic.sem_full) (current_cpu, &sc->argbuf);
#else
      pc = (*sc->semantic.sem_full) (current_cpu, sc);
#endif
      m32r_model_update_insn_cycles (current_cpu, 1);
      TRACE_INSN_FINI (current_cpu, 1);
    }

  return pc;
}

EOF

;;

xinit)

cat <<EOF
/*xxxinit*/
EOF

;;

xfull-extract-* | xfast-extract-*)

cat <<EOF
{
  PCADDR pc = CPU (h_pc);

  if ((pc & 3) != 0)
    {
      /* This only occurs when single stepping.
	 The test is unnecessary otherwise, but the cost is teensy,
	 compared with decoding/extraction.  */
      UHI insn = GETIMEMUHI (current_cpu, pc);
      extract16 (current_cpu, pc, insn & 0x7fff, sc, FAST_P);
    }
  else
    {
      USI insn = GETIMEMUSI (current_cpu, pc);
      if ((SI) insn < 0)
	{
	  extract32 (current_cpu, pc, insn, sc, FAST_P);
	}
      else
	{
	  extract16 (current_cpu, pc, insn >> 16, sc, FAST_P);
	  extract16 (current_cpu, pc + 2, insn & 0x7fff, sc + 1, FAST_P);
	  /* The m32r doesn't support parallel execution.  */
	  if ((insn & 0x8000) != 0
	      && (insn & 0x7fff) != 0x7000) /* parallel nops are ok */
	    sim_engine_illegal_insn (current_cpu, pc);
	}
    }
}
EOF

;;

xfull-exec-* | xfast-exec-*)

cat <<EOF
{
#if WITH_SCACHE && FAST_P && WITH_SEM_SWITCH_FAST
#define DEFINE_SWITCH
#include "sem-switch.c"
#else
  PCADDR new_pc = execute (current_cpu, sc, FAST_P);
  CPU (h_pc) = new_pc;
#endif
}
EOF

;;

*)
  echo "Invalid argument to mainloop.in: $1" >&2
  exit 1
  ;;

esac