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/* frv vliw model.
Copyright (C) 1999-2021 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]);
}
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