93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/* frv vliw model.
|
|
Copyright (C) 1999, 2000, 2001, 2003, 2007, 2008, 2009, 2010, 2011
|
|
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]);
|
|
}
|
|
|