# Simulator main loop for i960. -*- C -*-# Copyright (C) 1996, 1997, 1998, 1999 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 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 M32R# 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" inxsupport)cat <<EOF/*static INLINE*/ const IDESC *extract32 (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn,	   ARGBUF *abuf, int fast_p){  /* ??? wilson, instructions are 32 bits.  */  const IDESC *d = @cpu@_decode (current_cpu, pc, (USI) insn, abuf);  @cpu@_fill_argbuf (current_cpu, abuf, d, 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 d;}#if 0/*static INLINE*/ const IDESC */* ??? wilson, Some instructions are 64 bits.  */extract64 (SIM_CPU *current_cpu, PCADDR pc, insn_t insn,	   ARGBUF *abuf, int fast_p){  const IDESC *d = @cpu@_decode (current_cpu, pc, (UDI) insn >> 32, abuf);  SEM_SET_CODE (abuf, d, fast_p);  abuf->idesc = d;  abuf->addr = pc;  return d;}#endifstatic INLINE SEM_PCexecute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p){  SEM_PC vpc;  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;      const CGEN_INSN *insn = idesc->idata;#if WITH_SCACHE_PBB      int virtual_p = CGEN_INSN_ATTR_VALUE (insn, 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))	    @cpu@_model_insn_before (current_cpu, 1 /*first_p*/);	  TRACE_INSN_INIT (current_cpu, abuf, 1);	  TRACE_INSN (current_cpu, insn,		      (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))	    {	      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)cat <<EOF/*xxxinit*/EOF;;xextract-simple | xextract-scache)cat <<EOF{  if ((pc & 3) != 0)    {      abort ();#if 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);#endif    }  else    {      USI insn = GETIMEMUSI (current_cpu, pc);      /* ??? wilson, insns are 32 bits, unless MEMB with displacement, which	 has high bit set, bit 12 set, and mode of 5, 12, 13, 14, or 15.  */      if (((SI) insn > 0)	  || ! (((insn & 0x3000) == 0x3000)		|| ((insn & 0x3C00) == 0x1400)))	{	  extract32 (current_cpu, pc, insn, sc, FAST_P);	}      else	{	  UDI llinsn = (((UDI) insn << 32) || GETIMEMUSI (current_cpu, pc+4));	  extract64 (current_cpu, pc, llinsn, sc, FAST_P);	}    }}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;  if ((pc & 3) != 0)    {      abort ();#if 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);      idesc = extract16 (current_cpu, pc, insn & 0x7fff, &sc->argbuf, FAST_P);      ++sc;      --max_insns;      ++icount;      pc += 2;      if (IDESC_CTI_P (idesc))	{	  SET_CTI_VPC (sc - 1);	  goto Finish;	}#endif    }  while (max_insns > 0)    {      USI insn = GETIMEMUSI (current_cpu, pc);#if 0      /* ??? wilson, insns are 32 bits, unless MEMB with displacement, which	 has high bit set, bit 12 set, and mode of 5, 12, 13, 14, or 15.  */      if (((SI) insn > 0)	  || ! (((insn & 0x3000) == 0x3000)		|| ((insn & 0x3C00) == 0x1400)))	{	  idesc = extract32 (current_cpu, pc, insn, &sc->argbuf, FAST_P);	  ++sc;	  --max_insns;	  ++icount;	  pc += 4;	  if (IDESC_CTI_P (idesc))	    {	      SET_CTI_VPC (sc - 1);	      break;	    }	}      else	{	  idesc = extract64 (current_cpu, pc, insn, &sc->argbuf, FAST_P);	  ++sc;	  --max_insns;	  ++icount;	  pc += 8;	  if (IDESC_CTI_P (idesc))	    {	      SET_CTI_VPC (sc - 1);	      break;	    }	}#else      idesc = extract32 (current_cpu, pc, insn, &sc->argbuf, FAST_P);      ++sc;      --max_insns;      ++icount;      pc += idesc->length;      if (IDESC_CTI_P (idesc))        {          SET_CTI_VPC (sc - 1);          break;        }    }#endif Finish:  SET_INSN_COUNT (icount);}EOF;;xfull-exec-* | xfast-exec-*)# Inputs: current_cpu, vpc, FAST_P# Outputs: vpc# vpc is the virtual program counter.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);#endifEOF;;*)  echo "Invalid argument to mainloop.in: $1" >&2  exit 1  ;;esac