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-rw-r--r--sim/iq2000/mloop.in244
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diff --git a/sim/iq2000/mloop.in b/sim/iq2000/mloop.in
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--- a/sim/iq2000/mloop.in
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-# Simulator main loop for IQ2000. -*- C -*-
-# Copyright (C) 1998, 1999 Free Software Foundation, Inc.
-# Contributed by Cygnus Solutions.
-#
-# 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 command
-#
-# Command is one of:
-#
-# init
-# support
-# extract-{simple,scache,pbb}
-# {full,fast}-exec-{simple,scache,pbb}
-#
-# A target need only provide a "full" version of one of simple,scache,pbb.
-# If the target wants it can also provide a fast version of same.
-# It can't provide more than this, however for illustration's sake the IQ2000
-# port provides examples of all.
-
-# ??? 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 const IDESC *
-extract (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn, ARGBUF *abuf,
- int fast_p)
-{
- const IDESC *id = @cpu@_decode (current_cpu, pc, insn, insn, abuf);
- @cpu@_fill_argbuf (current_cpu, abuf, id, pc, fast_p);
- if (! fast_p)
- {
- int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
- int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
- @cpu@_fill_argbuf_tp (current_cpu, abuf, trace_p, profile_p);
- }
- return id;
-}
-
-static INLINE SEM_PC
-execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p)
-{
- SEM_PC vpc;
-
- /* Force R0 to zero before every insn. */
- @cpu@_h_gr_set (current_cpu, 0, 0);
-
- if (fast_p)
- {
-#if ! WITH_SEM_SWITCH_FAST
-#if WITH_SCACHE
- vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, sc);
-#else
- vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, &sc->argbuf);
-#endif
-#else
- abort ();
-#endif /* WITH_SEM_SWITCH_FAST */
- }
- else
- {
-#if ! WITH_SEM_SWITCH_FULL
- ARGBUF *abuf = &sc->argbuf;
- const IDESC *idesc = abuf->idesc;
-#if WITH_SCACHE_PBB
- int virtual_p = CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_VIRTUAL);
-#else
- int virtual_p = 0;
-#endif
-
- if (! virtual_p)
- {
- /* FIXME: call x-before */
- if (ARGBUF_PROFILE_P (abuf))
- PROFILE_COUNT_INSN (current_cpu, abuf->addr, idesc->num);
- /* FIXME: Later make cover macros: PROFILE_INSN_{INIT,FINI}. */
- if (PROFILE_MODEL_P (current_cpu)
- && ARGBUF_PROFILE_P (abuf))
- @cpu@_model_insn_before (current_cpu, 1 /*first_p*/);
- TRACE_INSN_INIT (current_cpu, abuf, 1);
- TRACE_INSN (current_cpu, idesc->idata,
- (const struct argbuf *) abuf, abuf->addr);
- }
-#if WITH_SCACHE
- vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, sc);
-#else
- vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, abuf);
-#endif
- if (! virtual_p)
- {
- /* FIXME: call x-after */
- if (PROFILE_MODEL_P (current_cpu)
- && ARGBUF_PROFILE_P (abuf))
- {
- int cycles;
-
- cycles = (*idesc->timing->model_fn) (current_cpu, sc);
- @cpu@_model_insn_after (current_cpu, 1 /*last_p*/, cycles);
- }
- TRACE_INSN_FINI (current_cpu, abuf, 1);
- }
-#else
- abort ();
-#endif /* WITH_SEM_SWITCH_FULL */
- }
-
- return vpc;
-}
-
-EOF
-;;
-
-xinit)
-;;
-
-xextract-simple | xextract-scache)
-
-# Inputs: current_cpu, vpc, sc, FAST_P
-# Outputs: sc filled in
-
-cat <<EOF
-{
- CGEN_INSN_INT insn = GETIMEMUSI (current_cpu, CPU2INSN(vpc));
- extract (current_cpu, vpc, insn, SEM_ARGBUF (sc), FAST_P);
- SEM_SKIP_COMPILE (current_cpu, sc, 1);
-}
-EOF
-
-;;
-
-xextract-pbb)
-
-# Inputs: current_cpu, pc, sc, max_insns, FAST_P
-# Outputs: sc, pc
-# sc must be left pointing past the last created entry.
-# pc must be left pointing past the last created entry.
-# If the pbb is terminated by a cti insn, SET_CTI_VPC(sc) must be called
-# to record the vpc of the cti insn.
-# SET_INSN_COUNT(n) must be called to record number of real insns.
-
-cat <<EOF
-{
- const IDESC *idesc;
- int icount = 0;
-
- /* Is the CTI instruction at the end of the PBB a likely branch? */
- int likely_cti;
-
- while (max_insns > 0)
- {
- USI insn = GETIMEMUSI (current_cpu, CPU2INSN(pc));
-
- idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
- SEM_SKIP_COMPILE (current_cpu, sc, 1);
- ++sc;
- --max_insns;
- ++icount;
- pc += idesc->length;
-
- if (IDESC_CTI_P (idesc))
- {
- /* Likely branches annul their delay slot if the branch is
- not taken by using the (skip ..) rtx. We'll rely on
- that. */
- likely_cti = (IDESC_SKIP_P (idesc));
-
- SET_CTI_VPC (sc - 1);
-
- if (CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_DELAY_SLOT))
- {
- USI insn = GETIMEMUSI (current_cpu, CPU2INSN(pc));
- idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
-
- if (likely_cti && IDESC_CTI_P (idesc))
- {
- /* malformed program */
- sim_io_eprintf (CPU_STATE (current_cpu),
- "malformed program, \`%s' insn in branch likely delay slot\n",
- CGEN_INSN_NAME (idesc->idata));
- }
- else
- {
- ++sc;
- --max_insns;
- ++icount;
- pc += idesc->length;
- }
- }
- break;
- }
- }
-
- Finish:
- SET_INSN_COUNT (icount);
-}
-EOF
-
-;;
-
-xfull-exec-* | xfast-exec-*)
-
-# Inputs: current_cpu, sc, FAST_P
-# Outputs: vpc
-# vpc contains the address of the next insn to execute
-
-cat <<EOF
-{
-#if (! FAST_P && WITH_SEM_SWITCH_FULL) || (FAST_P && WITH_SEM_SWITCH_FAST)
-#define DEFINE_SWITCH
-#include "sem-switch.c"
-#else
- vpc = execute (current_cpu, vpc, FAST_P);
-#endif
-}
-EOF
-
-;;
-
-*)
- echo "Invalid argument to mainloop.in: $1" >&2
- exit 1
- ;;
-
-esac
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