433 lines
10 KiB
C
433 lines
10 KiB
C
/* m32r simulator support code
|
||
Copyright (C) 1996-2022 Free Software Foundation, Inc.
|
||
Contributed by Cygnus Support.
|
||
|
||
This file is part of GDB, the GNU debugger.
|
||
|
||
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/>. */
|
||
|
||
/* This must come before any other includes. */
|
||
#include "defs.h"
|
||
|
||
#define WANT_CPU m32rbf
|
||
#define WANT_CPU_M32RBF
|
||
|
||
#include "sim-main.h"
|
||
#include "cgen-mem.h"
|
||
#include "cgen-ops.h"
|
||
#include <stdlib.h>
|
||
|
||
/* Return the size of REGNO in bytes. */
|
||
|
||
static int
|
||
m32rbf_register_size (int regno)
|
||
{
|
||
return 4;
|
||
}
|
||
|
||
/* Decode gdb ctrl register number. */
|
||
|
||
int
|
||
m32r_decode_gdb_ctrl_regnum (int gdb_regnum)
|
||
{
|
||
switch (gdb_regnum)
|
||
{
|
||
case PSW_REGNUM : return H_CR_PSW;
|
||
case CBR_REGNUM : return H_CR_CBR;
|
||
case SPI_REGNUM : return H_CR_SPI;
|
||
case SPU_REGNUM : return H_CR_SPU;
|
||
case BPC_REGNUM : return H_CR_BPC;
|
||
case BBPSW_REGNUM : return H_CR_BBPSW;
|
||
case BBPC_REGNUM : return H_CR_BBPC;
|
||
case EVB_REGNUM : return H_CR_CR5;
|
||
}
|
||
abort ();
|
||
}
|
||
|
||
/* The contents of BUF are in target byte order. */
|
||
|
||
int
|
||
m32rbf_fetch_register (SIM_CPU *current_cpu, int rn, unsigned char *buf, int len)
|
||
{
|
||
int size = m32rbf_register_size (rn);
|
||
if (len != size)
|
||
return -1;
|
||
|
||
if (rn < 16)
|
||
SETTWI (buf, m32rbf_h_gr_get (current_cpu, rn));
|
||
else
|
||
switch (rn)
|
||
{
|
||
case PSW_REGNUM :
|
||
case CBR_REGNUM :
|
||
case SPI_REGNUM :
|
||
case SPU_REGNUM :
|
||
case BPC_REGNUM :
|
||
case BBPSW_REGNUM :
|
||
case BBPC_REGNUM :
|
||
SETTWI (buf, m32rbf_h_cr_get (current_cpu,
|
||
m32r_decode_gdb_ctrl_regnum (rn)));
|
||
break;
|
||
case PC_REGNUM :
|
||
SETTWI (buf, m32rbf_h_pc_get (current_cpu));
|
||
break;
|
||
case ACCL_REGNUM :
|
||
SETTWI (buf, GETLODI (m32rbf_h_accum_get (current_cpu)));
|
||
break;
|
||
case ACCH_REGNUM :
|
||
SETTWI (buf, GETHIDI (m32rbf_h_accum_get (current_cpu)));
|
||
break;
|
||
default :
|
||
return 0;
|
||
}
|
||
|
||
return size;
|
||
}
|
||
|
||
/* The contents of BUF are in target byte order. */
|
||
|
||
int
|
||
m32rbf_store_register (SIM_CPU *current_cpu, int rn, unsigned char *buf, int len)
|
||
{
|
||
int size = m32rbf_register_size (rn);
|
||
if (len != size)
|
||
return -1;
|
||
|
||
if (rn < 16)
|
||
m32rbf_h_gr_set (current_cpu, rn, GETTWI (buf));
|
||
else
|
||
switch (rn)
|
||
{
|
||
case PSW_REGNUM :
|
||
case CBR_REGNUM :
|
||
case SPI_REGNUM :
|
||
case SPU_REGNUM :
|
||
case BPC_REGNUM :
|
||
case BBPSW_REGNUM :
|
||
case BBPC_REGNUM :
|
||
m32rbf_h_cr_set (current_cpu,
|
||
m32r_decode_gdb_ctrl_regnum (rn),
|
||
GETTWI (buf));
|
||
break;
|
||
case PC_REGNUM :
|
||
m32rbf_h_pc_set (current_cpu, GETTWI (buf));
|
||
break;
|
||
case ACCL_REGNUM :
|
||
{
|
||
DI val = m32rbf_h_accum_get (current_cpu);
|
||
SETLODI (val, GETTWI (buf));
|
||
m32rbf_h_accum_set (current_cpu, val);
|
||
break;
|
||
}
|
||
case ACCH_REGNUM :
|
||
{
|
||
DI val = m32rbf_h_accum_get (current_cpu);
|
||
SETHIDI (val, GETTWI (buf));
|
||
m32rbf_h_accum_set (current_cpu, val);
|
||
break;
|
||
}
|
||
default :
|
||
return 0;
|
||
}
|
||
|
||
return size;
|
||
}
|
||
|
||
USI
|
||
m32rbf_h_cr_get_handler (SIM_CPU *current_cpu, UINT cr)
|
||
{
|
||
switch (cr)
|
||
{
|
||
case H_CR_PSW : /* psw */
|
||
return (((CPU (h_bpsw) & 0xc1) << 8)
|
||
| ((CPU (h_psw) & 0xc0) << 0)
|
||
| GET_H_COND ());
|
||
case H_CR_BBPSW : /* backup backup psw */
|
||
return CPU (h_bbpsw) & 0xc1;
|
||
case H_CR_CBR : /* condition bit */
|
||
return GET_H_COND ();
|
||
case H_CR_SPI : /* interrupt stack pointer */
|
||
if (! GET_H_SM ())
|
||
return CPU (h_gr[H_GR_SP]);
|
||
else
|
||
return CPU (h_cr[H_CR_SPI]);
|
||
case H_CR_SPU : /* user stack pointer */
|
||
if (GET_H_SM ())
|
||
return CPU (h_gr[H_GR_SP]);
|
||
else
|
||
return CPU (h_cr[H_CR_SPU]);
|
||
case H_CR_BPC : /* backup pc */
|
||
return CPU (h_cr[H_CR_BPC]) & 0xfffffffe;
|
||
case H_CR_BBPC : /* backup backup pc */
|
||
return CPU (h_cr[H_CR_BBPC]) & 0xfffffffe;
|
||
case 4 : /* ??? unspecified, but apparently available */
|
||
case 5 : /* ??? unspecified, but apparently available */
|
||
return CPU (h_cr[cr]);
|
||
default :
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
void
|
||
m32rbf_h_cr_set_handler (SIM_CPU *current_cpu, UINT cr, USI newval)
|
||
{
|
||
switch (cr)
|
||
{
|
||
case H_CR_PSW : /* psw */
|
||
{
|
||
int old_sm = (CPU (h_psw) & 0x80) != 0;
|
||
int new_sm = (newval & 0x80) != 0;
|
||
CPU (h_bpsw) = (newval >> 8) & 0xff;
|
||
CPU (h_psw) = newval & 0xff;
|
||
SET_H_COND (newval & 1);
|
||
/* When switching stack modes, update the registers. */
|
||
if (old_sm != new_sm)
|
||
{
|
||
if (old_sm)
|
||
{
|
||
/* Switching user -> system. */
|
||
CPU (h_cr[H_CR_SPU]) = CPU (h_gr[H_GR_SP]);
|
||
CPU (h_gr[H_GR_SP]) = CPU (h_cr[H_CR_SPI]);
|
||
}
|
||
else
|
||
{
|
||
/* Switching system -> user. */
|
||
CPU (h_cr[H_CR_SPI]) = CPU (h_gr[H_GR_SP]);
|
||
CPU (h_gr[H_GR_SP]) = CPU (h_cr[H_CR_SPU]);
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
case H_CR_BBPSW : /* backup backup psw */
|
||
CPU (h_bbpsw) = newval & 0xff;
|
||
break;
|
||
case H_CR_CBR : /* condition bit */
|
||
SET_H_COND (newval & 1);
|
||
break;
|
||
case H_CR_SPI : /* interrupt stack pointer */
|
||
if (! GET_H_SM ())
|
||
CPU (h_gr[H_GR_SP]) = newval;
|
||
else
|
||
CPU (h_cr[H_CR_SPI]) = newval;
|
||
break;
|
||
case H_CR_SPU : /* user stack pointer */
|
||
if (GET_H_SM ())
|
||
CPU (h_gr[H_GR_SP]) = newval;
|
||
else
|
||
CPU (h_cr[H_CR_SPU]) = newval;
|
||
break;
|
||
case H_CR_BPC : /* backup pc */
|
||
CPU (h_cr[H_CR_BPC]) = newval;
|
||
break;
|
||
case H_CR_BBPC : /* backup backup pc */
|
||
CPU (h_cr[H_CR_BBPC]) = newval;
|
||
break;
|
||
case 4 : /* ??? unspecified, but apparently available */
|
||
case 5 : /* ??? unspecified, but apparently available */
|
||
CPU (h_cr[cr]) = newval;
|
||
break;
|
||
default :
|
||
/* ignore */
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Cover fns to access h-psw. */
|
||
|
||
UQI
|
||
m32rbf_h_psw_get_handler (SIM_CPU *current_cpu)
|
||
{
|
||
return (CPU (h_psw) & 0xfe) | (CPU (h_cond) & 1);
|
||
}
|
||
|
||
void
|
||
m32rbf_h_psw_set_handler (SIM_CPU *current_cpu, UQI newval)
|
||
{
|
||
CPU (h_psw) = newval;
|
||
CPU (h_cond) = newval & 1;
|
||
}
|
||
|
||
/* Cover fns to access h-accum. */
|
||
|
||
DI
|
||
m32rbf_h_accum_get_handler (SIM_CPU *current_cpu)
|
||
{
|
||
/* Sign extend the top 8 bits. */
|
||
DI r;
|
||
#if 1
|
||
r = ANDDI (CPU (h_accum), MAKEDI (0xffffff, 0xffffffff));
|
||
r = XORDI (r, MAKEDI (0x800000, 0));
|
||
r = SUBDI (r, MAKEDI (0x800000, 0));
|
||
#else
|
||
SI hi,lo;
|
||
r = CPU (h_accum);
|
||
hi = GETHIDI (r);
|
||
lo = GETLODI (r);
|
||
hi = ((hi & 0xffffff) ^ 0x800000) - 0x800000;
|
||
r = MAKEDI (hi, lo);
|
||
#endif
|
||
return r;
|
||
}
|
||
|
||
void
|
||
m32rbf_h_accum_set_handler (SIM_CPU *current_cpu, DI newval)
|
||
{
|
||
CPU (h_accum) = newval;
|
||
}
|
||
|
||
#if WITH_PROFILE_MODEL_P
|
||
|
||
/* FIXME: Some of these should be inline or macros. Later. */
|
||
|
||
/* Initialize cycle counting for an insn.
|
||
FIRST_P is non-zero if this is the first insn in a set of parallel
|
||
insns. */
|
||
|
||
void
|
||
m32rbf_model_insn_before (SIM_CPU *cpu, int first_p)
|
||
{
|
||
M32R_MISC_PROFILE *mp = CPU_M32R_MISC_PROFILE (cpu);
|
||
mp->cti_stall = 0;
|
||
mp->load_stall = 0;
|
||
if (first_p)
|
||
{
|
||
mp->load_regs_pending = 0;
|
||
mp->biggest_cycles = 0;
|
||
}
|
||
}
|
||
|
||
/* Record the cycles computed for an insn.
|
||
LAST_P is non-zero if this is the last insn in a set of parallel insns,
|
||
and we update the total cycle count.
|
||
CYCLES is the cycle count of the insn. */
|
||
|
||
void
|
||
m32rbf_model_insn_after (SIM_CPU *cpu, int last_p, int cycles)
|
||
{
|
||
PROFILE_DATA *p = CPU_PROFILE_DATA (cpu);
|
||
M32R_MISC_PROFILE *mp = CPU_M32R_MISC_PROFILE (cpu);
|
||
unsigned long total = cycles + mp->cti_stall + mp->load_stall;
|
||
|
||
if (last_p)
|
||
{
|
||
unsigned long biggest = total > mp->biggest_cycles ? total : mp->biggest_cycles;
|
||
PROFILE_MODEL_TOTAL_CYCLES (p) += biggest;
|
||
PROFILE_MODEL_CUR_INSN_CYCLES (p) = total;
|
||
}
|
||
else
|
||
{
|
||
/* Here we take advantage of the fact that !last_p -> first_p. */
|
||
mp->biggest_cycles = total;
|
||
PROFILE_MODEL_CUR_INSN_CYCLES (p) = total;
|
||
}
|
||
|
||
/* Branch and load stall counts are recorded independently of the
|
||
total cycle count. */
|
||
PROFILE_MODEL_CTI_STALL_CYCLES (p) += mp->cti_stall;
|
||
PROFILE_MODEL_LOAD_STALL_CYCLES (p) += mp->load_stall;
|
||
|
||
mp->load_regs = mp->load_regs_pending;
|
||
}
|
||
|
||
static INLINE void
|
||
check_load_stall (SIM_CPU *cpu, int regno)
|
||
{
|
||
UINT h_gr = CPU_M32R_MISC_PROFILE (cpu)->load_regs;
|
||
|
||
if (regno != -1
|
||
&& (h_gr & (1 << regno)) != 0)
|
||
{
|
||
CPU_M32R_MISC_PROFILE (cpu)->load_stall += 2;
|
||
if (TRACE_INSN_P (cpu))
|
||
cgen_trace_printf (cpu, " ; Load stall of 2 cycles.");
|
||
}
|
||
}
|
||
|
||
int
|
||
m32rbf_model_m32r_d_u_exec (SIM_CPU *cpu, const IDESC *idesc,
|
||
int unit_num, int referenced,
|
||
INT sr, INT sr2, INT dr)
|
||
{
|
||
check_load_stall (cpu, sr);
|
||
check_load_stall (cpu, sr2);
|
||
return idesc->timing->units[unit_num].done;
|
||
}
|
||
|
||
int
|
||
m32rbf_model_m32r_d_u_cmp (SIM_CPU *cpu, const IDESC *idesc,
|
||
int unit_num, int referenced,
|
||
INT src1, INT src2)
|
||
{
|
||
check_load_stall (cpu, src1);
|
||
check_load_stall (cpu, src2);
|
||
return idesc->timing->units[unit_num].done;
|
||
}
|
||
|
||
int
|
||
m32rbf_model_m32r_d_u_mac (SIM_CPU *cpu, const IDESC *idesc,
|
||
int unit_num, int referenced,
|
||
INT src1, INT src2)
|
||
{
|
||
check_load_stall (cpu, src1);
|
||
check_load_stall (cpu, src2);
|
||
return idesc->timing->units[unit_num].done;
|
||
}
|
||
|
||
int
|
||
m32rbf_model_m32r_d_u_cti (SIM_CPU *cpu, const IDESC *idesc,
|
||
int unit_num, int referenced,
|
||
INT sr)
|
||
{
|
||
PROFILE_DATA *profile = CPU_PROFILE_DATA (cpu);
|
||
int taken_p = (referenced & (1 << 1)) != 0;
|
||
|
||
check_load_stall (cpu, sr);
|
||
if (taken_p)
|
||
{
|
||
CPU_M32R_MISC_PROFILE (cpu)->cti_stall += 2;
|
||
PROFILE_MODEL_TAKEN_COUNT (profile) += 1;
|
||
}
|
||
else
|
||
PROFILE_MODEL_UNTAKEN_COUNT (profile) += 1;
|
||
return idesc->timing->units[unit_num].done;
|
||
}
|
||
|
||
int
|
||
m32rbf_model_m32r_d_u_load (SIM_CPU *cpu, const IDESC *idesc,
|
||
int unit_num, int referenced,
|
||
INT sr, INT dr)
|
||
{
|
||
CPU_M32R_MISC_PROFILE (cpu)->load_regs_pending |= (1 << dr);
|
||
check_load_stall (cpu, sr);
|
||
return idesc->timing->units[unit_num].done;
|
||
}
|
||
|
||
int
|
||
m32rbf_model_m32r_d_u_store (SIM_CPU *cpu, const IDESC *idesc,
|
||
int unit_num, int referenced,
|
||
INT src1, INT src2)
|
||
{
|
||
check_load_stall (cpu, src1);
|
||
check_load_stall (cpu, src2);
|
||
return idesc->timing->units[unit_num].done;
|
||
}
|
||
|
||
int
|
||
m32rbf_model_test_u_exec (SIM_CPU *cpu, const IDESC *idesc,
|
||
int unit_num, int referenced)
|
||
{
|
||
return idesc->timing->units[unit_num].done;
|
||
}
|
||
|
||
#endif /* WITH_PROFILE_MODEL_P */
|