/* frv vliw model.

   Copyright (C) 1999-2018 Free Software Foundation, Inc.

   Contributed by Red Hat.

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 3 of the License, 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, see <http://www.gnu.org/licenses/>.  */

#define WANT_CPU frvbf

#define WANT_CPU_FRVBF

#include "sim-main.h"

/* Simulator specific vliw related functions.  Additional vliw related

   code used by both the simulator and the assembler is in frv.opc.  */

int insns_in_slot[UNIT_NUM_UNITS] = {0};

void

frv_vliw_setup_insn (SIM_CPU *current_cpu, const CGEN_INSN *insn)

{

  FRV_VLIW *vliw;

  int index;

  /* Always clear the NE index which indicates the target register

     of a non excepting insn. This will be reset by the insn if

     necessary.  */

  frv_interrupt_state.ne_index = NE_NOFLAG;

  vliw = CPU_VLIW (current_cpu);

  index = vliw->next_slot - 1;

  if (frv_is_float_insn (insn))

    {

      /* If the insn is to be added and is a floating point insn and

	 it is the first floating point insn in the vliw, then clear

	 FSR0.FTT.  */

      int i;

      for (i = 0; i < index; ++i)

	if (frv_is_float_major (vliw->major[i], vliw->mach))

	  break; /* found float insn.  */

      if (i >= index)

	{

	  SI fsr0 = GET_FSR (0);

	  SET_FSR_FTT (fsr0, FTT_NONE);

	  SET_FSR (0, fsr0);

	}

    }

  else if (frv_is_media_insn (insn))

    {

      /* Clear the appropriate MSR fields depending on which slot

	 this insn is in.  */

      CGEN_ATTR_VALUE_ENUM_TYPE preserve_ovf;

      SI msr0 = GET_MSR (0);

      preserve_ovf = CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_PRESERVE_OVF);

      if ((*vliw->current_vliw)[index] == UNIT_FM0)

	{

	  if (! preserve_ovf)

	    {

	      /* Clear MSR0.OVF and MSR0.SIE.  */

	      CLEAR_MSR_SIE (msr0);

	      CLEAR_MSR_OVF (msr0);

	    }

	}

      else

	{

	  if (! preserve_ovf)

	    {

	      /* Clear MSR1.OVF and MSR1.SIE.  */

	      SI msr1 = GET_MSR (1);

	      CLEAR_MSR_SIE (msr1);

	      CLEAR_MSR_OVF (msr1);

	      SET_MSR (1, msr1);

	    }

	}

      SET_MSR (0, msr0);

    } /* Insn is a media insns.  */

  COUNT_INSNS_IN_SLOT ((*vliw->current_vliw)[index]);

}