sim/sh64/sh64.c

/* SH5 simulator support code
   Copyright (C) 2000-2013 Free Software Foundation, Inc.
   Contributed by Red Hat, 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 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
#define WANT_CPU_SH64

#include "sim-main.h"
#include "sim-fpu.h"
#include "cgen-mem.h"
#include "cgen-ops.h"

#include "gdb/callback.h"
#include "defs-compact.h"

#include "bfd.h"
/* From include/gdb/.  */
#include "gdb/sim-sh.h"

#define SYS_exit        1
#define	SYS_read	3
#define SYS_write       4
#define	SYS_open	5
#define	SYS_close	6
#define	SYS_lseek	19
#define	SYS_time	23
#define	SYS_argc	172
#define	SYS_argnlen	173
#define	SYS_argn	174

IDESC * sh64_idesc_media;
IDESC * sh64_idesc_compact;

BI
sh64_endian (SIM_CPU *current_cpu)
{
  return (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN);
}

SF
sh64_fldi0 (SIM_CPU *current_cpu)
{
  SF result;
  sim_fpu_to32 (&result, &sim_fpu_zero);
  return result;
}

SF
sh64_fldi1 (SIM_CPU *current_cpu)
{
  SF result;
  sim_fpu_to32 (&result, &sim_fpu_one);
  return result;
}

DF
sh64_fabsd(SIM_CPU *current_cpu, DF drgh)
{
  DF result;
  sim_fpu f, fres;

  sim_fpu_64to (&f, drgh);
  sim_fpu_abs (&fres, &f);
  sim_fpu_to64 (&result, &fres);
  return result;
}

SF
sh64_fabss(SIM_CPU *current_cpu, SF frgh)
{
  SF result;
  sim_fpu f, fres;

  sim_fpu_32to (&f, frgh);
  sim_fpu_abs (&fres, &f);
  sim_fpu_to32 (&result, &fres);
  return result;
}

DF
sh64_faddd(SIM_CPU *current_cpu, DF drg, DF drh)
{
  DF result;
  sim_fpu f1, f2, fres;

  sim_fpu_64to (&f1, drg);
  sim_fpu_64to (&f2, drh);
  sim_fpu_add (&fres, &f1, &f2);
  sim_fpu_to64 (&result, &fres);
  return result;
}

SF
sh64_fadds(SIM_CPU *current_cpu, SF frg, SF frh)
{
  SF result;
  sim_fpu f1, f2, fres;

  sim_fpu_32to (&f1, frg);
  sim_fpu_32to (&f2, frh);
  sim_fpu_add (&fres, &f1, &f2);
  sim_fpu_to32 (&result, &fres);
  return result;
}

BI
sh64_fcmpeqd(SIM_CPU *current_cpu, DF drg, DF drh)
{
  sim_fpu f1, f2;

  sim_fpu_64to (&f1, drg);
  sim_fpu_64to (&f2, drh);
  return sim_fpu_is_eq (&f1, &f2);
}

BI
sh64_fcmpeqs(SIM_CPU *current_cpu, SF frg, SF frh)
{
  sim_fpu f1, f2;

  sim_fpu_32to (&f1, frg);
  sim_fpu_32to (&f2, frh);
  return sim_fpu_is_eq (&f1, &f2);
}

BI
sh64_fcmpged(SIM_CPU *current_cpu, DF drg, DF drh)
{
  sim_fpu f1, f2;

  sim_fpu_64to (&f1, drg);
  sim_fpu_64to (&f2, drh);
  return sim_fpu_is_ge (&f1, &f2);
}

BI
sh64_fcmpges(SIM_CPU *current_cpu, SF frg, SF frh)
{
  sim_fpu f1, f2;

  sim_fpu_32to (&f1, frg);
  sim_fpu_32to (&f2, frh);
  return sim_fpu_is_ge (&f1, &f2);
}

BI
sh64_fcmpgtd(SIM_CPU *current_cpu, DF drg, DF drh)
{
  sim_fpu f1, f2;

  sim_fpu_64to (&f1, drg);
  sim_fpu_64to (&f2, drh);
  return sim_fpu_is_gt (&f1, &f2);
}

BI
sh64_fcmpgts(SIM_CPU *current_cpu, SF frg, SF frh)
{
  sim_fpu f1, f2;

  sim_fpu_32to (&f1, frg);
  sim_fpu_32to (&f2, frh);
  return sim_fpu_is_gt (&f1, &f2);
}

BI
sh64_fcmpund(SIM_CPU *current_cpu, DF drg, DF drh)
{
  sim_fpu f1, f2;

  sim_fpu_64to (&f1, drg);
  sim_fpu_64to (&f2, drh);
  return (sim_fpu_is_nan (&f1) || sim_fpu_is_nan (&f2));
}

BI
sh64_fcmpuns(SIM_CPU *current_cpu, SF frg, SF frh)
{
  sim_fpu f1, f2;

  sim_fpu_32to (&f1, frg);
  sim_fpu_32to (&f2, frh); 
  return (sim_fpu_is_nan (&f1) || sim_fpu_is_nan (&f2));
}  

SF
sh64_fcnvds(SIM_CPU *current_cpu, DF drgh)
{
  union {
    unsigned long long ll;
    double d;
  } f1;

  union {
    unsigned long l;
    float f;
  } f2;

  f1.ll = drgh;
  f2.f = (float) f1.d;
  
  return (SF) f2.l;
}

DF
sh64_fcnvsd(SIM_CPU *current_cpu, SF frgh)
{
  DF result;
  sim_fpu f;

  sim_fpu_32to (&f, frgh);
  sim_fpu_to64 (&result, &f);
  return result;
}

DF
sh64_fdivd(SIM_CPU *current_cpu, DF drg, DF drh)
{
  DF result;
  sim_fpu f1, f2, fres;

  sim_fpu_64to (&f1, drg);
  sim_fpu_64to (&f2, drh);
  sim_fpu_div (&fres, &f1, &f2);
  sim_fpu_to64 (&result, &fres);
  return result;
}

SF
sh64_fdivs(SIM_CPU *current_cpu, SF frg, SF frh)
{
  SF result;
  sim_fpu f1, f2, fres;

  sim_fpu_32to (&f1, frg);
  sim_fpu_32to (&f2, frh);
  sim_fpu_div (&fres, &f1, &f2);
  sim_fpu_to32 (&result, &fres);
  return result;
}

DF
sh64_floatld(SIM_CPU *current_cpu, SF frgh)
{
  DF result;
  sim_fpu f;

  sim_fpu_i32to (&f, frgh, sim_fpu_round_default); 
  sim_fpu_to64 (&result, &f);
  return result;
}

SF
sh64_floatls(SIM_CPU *current_cpu, SF frgh)
{
  SF result;
  sim_fpu f;

  sim_fpu_i32to (&f, frgh, sim_fpu_round_default);
  sim_fpu_to32 (&result, &f);
  return result;
}

DF
sh64_floatqd(SIM_CPU *current_cpu, DF drgh)
{
  DF result;
  sim_fpu f;

  sim_fpu_i64to (&f, drgh, sim_fpu_round_default);
  sim_fpu_to64 (&result, &f);
  return result;
}

SF
sh64_floatqs(SIM_CPU *current_cpu, DF drgh)
{
  SF result;
  sim_fpu f;

  sim_fpu_i64to (&f, drgh, sim_fpu_round_default);
  sim_fpu_to32 (&result, &f);
  return result;
}

SF
sh64_fmacs(SIM_CPU *current_cpu, SF fr0, SF frm, SF frn)
{
  SF result;
  sim_fpu m1, m2, a1, fres;

  sim_fpu_32to (&m1, fr0);
  sim_fpu_32to (&m2, frm);
  sim_fpu_32to (&a1, frn);

  sim_fpu_mul (&fres, &m1, &m2);
  sim_fpu_add (&fres, &fres, &a1);
  
  sim_fpu_to32 (&result, &fres);
  return result;
}

DF
sh64_fmuld(SIM_CPU *current_cpu, DF drg, DF drh)
{
  DF result;
  sim_fpu f1, f2, fres;

  sim_fpu_64to (&f1, drg);
  sim_fpu_64to (&f2, drh);
  sim_fpu_mul (&fres, &f1, &f2);
  sim_fpu_to64 (&result, &fres);
  return result;
}

SF
sh64_fmuls(SIM_CPU *current_cpu, SF frg, SF frh)
{
  SF result;
  sim_fpu f1, f2, fres;

  sim_fpu_32to (&f1, frg);
  sim_fpu_32to (&f2, frh);
  sim_fpu_mul (&fres, &f1, &f2);
  sim_fpu_to32 (&result, &fres);
  return result;
}

DF
sh64_fnegd(SIM_CPU *current_cpu, DF drgh)
{
  DF result;
  sim_fpu f1, f2;

  sim_fpu_64to (&f1, drgh);
  sim_fpu_neg (&f2, &f1);
  sim_fpu_to64 (&result, &f2);
  return result;
}

SF
sh64_fnegs(SIM_CPU *current_cpu, SF frgh)
{
  SF result;
  sim_fpu f, fres;

  sim_fpu_32to (&f, frgh);
  sim_fpu_neg (&fres, &f);
  sim_fpu_to32 (&result, &fres);
  return result;
}

DF
sh64_fsqrtd(SIM_CPU *current_cpu, DF drgh)
{
  DF result;
  sim_fpu f, fres;

  sim_fpu_64to (&f, drgh);
  sim_fpu_sqrt (&fres, &f);
  sim_fpu_to64 (&result, &fres);
  return result;
}

SF
sh64_fsqrts(SIM_CPU *current_cpu, SF frgh)
{
  SF result;
  sim_fpu f, fres;

  sim_fpu_32to (&f, frgh);
  sim_fpu_sqrt (&fres, &f);
  sim_fpu_to32 (&result, &fres);
  return result;
}

DF
sh64_fsubd(SIM_CPU *current_cpu, DF drg, DF drh)
{
  DF result;
  sim_fpu f1, f2, fres;

  sim_fpu_64to (&f1, drg);
  sim_fpu_64to (&f2, drh);
  sim_fpu_sub (&fres, &f1, &f2);
  sim_fpu_to64 (&result, &fres);
  return result;
}

SF
sh64_fsubs(SIM_CPU *current_cpu, SF frg, SF frh)
{
  SF result;
  sim_fpu f1, f2, fres;

  sim_fpu_32to (&f1, frg);
  sim_fpu_32to (&f2, frh);
  sim_fpu_sub (&fres, &f1, &f2);
  sim_fpu_to32 (&result, &fres);
  return result;
}

SF
sh64_ftrcdl(SIM_CPU *current_cpu, DF drgh)
{
  SI result;
  sim_fpu f;

  sim_fpu_64to (&f, drgh);
  sim_fpu_to32i (&result, &f, sim_fpu_round_zero);
  return (SF) result;
}

SF
sh64_ftrcsl(SIM_CPU *current_cpu, SF frgh)
{
  SI result;
  sim_fpu f;

  sim_fpu_32to (&f, frgh);
  sim_fpu_to32i (&result, &f, sim_fpu_round_zero);
  return (SF) result;
}

DF
sh64_ftrcdq(SIM_CPU *current_cpu, DF drgh)
{
  DI result;
  sim_fpu f;

  sim_fpu_64to (&f, drgh);
  sim_fpu_to64i (&result, &f, sim_fpu_round_zero);
  return (DF) result;
}

DF
sh64_ftrcsq(SIM_CPU *current_cpu, SF frgh)
{
  DI result;
  sim_fpu f;

  sim_fpu_32to (&f, frgh);
  sim_fpu_to64i (&result, &f, sim_fpu_round_zero);
  return (DF) result;
}

VOID
sh64_ftrvs(SIM_CPU *cpu, unsigned g, unsigned h, unsigned f)
{
  int i, j;

  for (i = 0; i < 4; i++)
    {
      SF result;
      sim_fpu sum;
      sim_fpu_32to (&sum, 0);

      for (j = 0; j < 4; j++)
	{
	  sim_fpu f1, f2, temp;
	  sim_fpu_32to (&f1, sh64_h_fr_get (cpu, (g + i) + (j * 4)));
	  sim_fpu_32to (&f2, sh64_h_fr_get (cpu, h + j));
	  sim_fpu_mul (&temp, &f1, &f2);
	  sim_fpu_add (&sum, &sum, &temp);
	}
      sim_fpu_to32 (&result, &sum);
      sh64_h_fr_set (cpu, f + i, result);
    }
}

VOID
sh64_fipr (SIM_CPU *cpu, unsigned m, unsigned n)
{
  SF result = sh64_fmuls (cpu, sh64_h_fvc_get (cpu, m), sh64_h_fvc_get (cpu, n));
  result = sh64_fadds (cpu, result, sh64_fmuls (cpu, sh64_h_frc_get (cpu, m + 1), sh64_h_frc_get (cpu, n + 1)));
  result = sh64_fadds (cpu, result, sh64_fmuls (cpu, sh64_h_frc_get (cpu, m + 2), sh64_h_frc_get (cpu, n + 2)));
  result = sh64_fadds (cpu, result, sh64_fmuls (cpu, sh64_h_frc_get (cpu, m + 3), sh64_h_frc_get (cpu, n + 3)));
  sh64_h_frc_set (cpu, n + 3, result);
}

SF
sh64_fiprs (SIM_CPU *cpu, unsigned g, unsigned h)
{
  SF temp = sh64_fmuls (cpu, sh64_h_fr_get (cpu, g), sh64_h_fr_get (cpu, h));
  temp = sh64_fadds (cpu, temp, sh64_fmuls (cpu, sh64_h_fr_get (cpu, g + 1), sh64_h_fr_get (cpu, h + 1)));
  temp = sh64_fadds (cpu, temp, sh64_fmuls (cpu, sh64_h_fr_get (cpu, g + 2), sh64_h_fr_get (cpu, h + 2)));
  temp = sh64_fadds (cpu, temp, sh64_fmuls (cpu, sh64_h_fr_get (cpu, g + 3), sh64_h_fr_get (cpu, h + 3)));
  return temp;
}

VOID
sh64_fldp (SIM_CPU *cpu, PCADDR pc, DI rm, DI rn, unsigned f)
{
  sh64_h_fr_set (cpu, f,     GETMEMSF (cpu, pc, rm + rn));
  sh64_h_fr_set (cpu, f + 1, GETMEMSF (cpu, pc, rm + rn + 4));
}

VOID
sh64_fstp (SIM_CPU *cpu, PCADDR pc, DI rm, DI rn, unsigned f)
{
  SETMEMSF (cpu, pc, rm + rn,     sh64_h_fr_get (cpu, f));
  SETMEMSF (cpu, pc, rm + rn + 4, sh64_h_fr_get (cpu, f + 1));
}

VOID
sh64_ftrv (SIM_CPU *cpu, UINT ignored)
{
  /* TODO: Unimplemented.  */
}

VOID
sh64_pref (SIM_CPU *cpu, SI addr)
{
  /* TODO: Unimplemented.  */
}

/* Count the number of arguments.  */
static int
count_argc (cpu)
     SIM_CPU *cpu;
{
  int i = 0;

  if (! STATE_PROG_ARGV (CPU_STATE (cpu)))
    return -1;
  
  while (STATE_PROG_ARGV (CPU_STATE (cpu)) [i] != NULL)
    ++i;

  return i;
}

/* Read a null terminated string from memory, return in a buffer */
static char *
fetch_str (current_cpu, pc, addr)
     SIM_CPU *current_cpu;
     PCADDR pc;
     DI addr;
{
  char *buf;
  int nr = 0;
  while (sim_core_read_1 (current_cpu,
			  pc, read_map, addr + nr) != 0)
    nr++;
  buf = NZALLOC (char, nr + 1);
  sim_read (CPU_STATE (current_cpu), addr, buf, nr);
  return buf;
}

static void
trap_handler (SIM_CPU *current_cpu, int shmedia_abi_p, UQI trapnum, PCADDR pc)
{
  char ch;
  switch (trapnum)
    {
    case 1:
      ch = GET_H_GRC (0);
      sim_io_write_stdout (CPU_STATE (current_cpu), &ch, 1);
      fflush (stdout);
      break;
    case 2:
      sim_engine_halt (CPU_STATE (current_cpu), current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
      break;
    case 34:
      {
	int i;
	int ret_reg = (shmedia_abi_p) ? 2 : 0;
	char *buf;
	DI PARM1 = GET_H_GR ((shmedia_abi_p) ? 3 : 5);
	DI PARM2 = GET_H_GR ((shmedia_abi_p) ? 4 : 6);
	DI PARM3 = GET_H_GR ((shmedia_abi_p) ? 5 : 7);
	
	switch (GET_H_GR ((shmedia_abi_p) ? 2 : 4))
	  {
	  case SYS_write:
	    buf = zalloc (PARM3);
	    sim_read (CPU_STATE (current_cpu), PARM2, buf, PARM3);
	    SET_H_GR (ret_reg,
		      sim_io_write (CPU_STATE (current_cpu),
				    PARM1, buf, PARM3));
	    free (buf);
	    break;

	  case SYS_lseek:
	    SET_H_GR (ret_reg,
		      sim_io_lseek (CPU_STATE (current_cpu),
				    PARM1, PARM2, PARM3));
	    break;
	    
	  case SYS_exit:
	    sim_engine_halt (CPU_STATE (current_cpu), current_cpu,
			     NULL, pc, sim_exited, PARM1);
	    break;

	  case SYS_read:
	    buf = zalloc (PARM3);
	    SET_H_GR (ret_reg,
		      sim_io_read (CPU_STATE (current_cpu),
				   PARM1, buf, PARM3));
	    sim_write (CPU_STATE (current_cpu), PARM2, buf, PARM3);
	    free (buf);
	    break;
	    
	  case SYS_open:
	    buf = fetch_str (current_cpu, pc, PARM1);
	    SET_H_GR (ret_reg,
		      sim_io_open (CPU_STATE (current_cpu),
				   buf, PARM2));
	    free (buf);
	    break;

	  case SYS_close:
	    SET_H_GR (ret_reg,
		      sim_io_close (CPU_STATE (current_cpu), PARM1));
	    break;

	  case SYS_time:
	    SET_H_GR (ret_reg, time (0));
	    break;

	  case SYS_argc:
	    SET_H_GR (ret_reg, count_argc (current_cpu));
	    break;

	  case SYS_argnlen:
	    if (PARM1 < count_argc (current_cpu))
	      SET_H_GR (ret_reg,
			strlen (STATE_PROG_ARGV (CPU_STATE (current_cpu)) [PARM1]));
	    else
	      SET_H_GR (ret_reg, -1);
	    break;

	  case SYS_argn:
	    if (PARM1 < count_argc (current_cpu))
	      {
		/* Include the NULL byte.  */
		i = strlen (STATE_PROG_ARGV (CPU_STATE (current_cpu)) [PARM1]) + 1;
		sim_write (CPU_STATE (current_cpu),
			   PARM2,
			   STATE_PROG_ARGV (CPU_STATE (current_cpu)) [PARM1],
			   i);

		/* Just for good measure.  */
		SET_H_GR (ret_reg, i);
		break;
	      }
	    else
	      SET_H_GR (ret_reg, -1);
	    break;

	  default:
	    SET_H_GR (ret_reg, -1);
	  }
      }
      break;
    case 253:
      puts ("pass");
      exit (0);
    case 254:
      puts ("fail");
      exit (1);
    case 0xc3:
      /* fall through.  */
    case 255:
      sim_engine_halt (CPU_STATE (current_cpu), current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
      break;
    }
}

void
sh64_trapa (SIM_CPU *current_cpu, DI rm, PCADDR pc)
{
  trap_handler (current_cpu, 1, (UQI) rm & 0xff, pc);
}

void
sh64_compact_trapa (SIM_CPU *current_cpu, UQI trapnum, PCADDR pc)
{
  int mach_sh5_p;

  /* If this is an SH5 executable, this is SHcompact code running in
     the SHmedia ABI.  */

  mach_sh5_p =
    (bfd_get_mach (STATE_PROG_BFD (CPU_STATE (current_cpu))) == bfd_mach_sh5);

  trap_handler (current_cpu, mach_sh5_p, trapnum, pc);
}

DI
sh64_nsb (SIM_CPU *current_cpu, DI rm)
{
  int result = 0, count;
  UDI source = (UDI) rm;

  if ((source >> 63))
    source = ~source;
  source <<= 1;

  for (count = 32; count; count >>= 1)
    {
      UDI newval = source << count;

      if ((newval >> count) == source)
	{
	  result |= count;
	  source = newval;
	}
    }
  
  return result;
}

void
sh64_break (SIM_CPU *current_cpu, PCADDR pc)
{
  SIM_DESC sd = CPU_STATE (current_cpu);
  sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
}

SI
sh64_movua (SIM_CPU *current_cpu, PCADDR pc, SI rn)
{
  SI v;
  int i;

  /* Move the data one byte at a time to avoid alignment problems.
     Be aware of endianness.  */
  v = 0;
  for (i = 0; i < 4; ++i)
    v = (v << 8) | (GETMEMQI (current_cpu, pc, rn + i) & 0xff);

  v = T2H_4 (v);
  return v;
}

void
set_isa (SIM_CPU *current_cpu, int mode)
{
  /* Do nothing.  */
}

/* The semantic code invokes this for invalid (unrecognized) instructions.  */

SEM_PC
sim_engine_invalid_insn (SIM_CPU *current_cpu, IADDR cia, SEM_PC vpc)
{
  SIM_DESC sd = CPU_STATE (current_cpu);
  sim_engine_halt (sd, current_cpu, NULL, cia, sim_stopped, SIM_SIGILL);

  return vpc;
}


/* Process an address exception.  */

void
sh64_core_signal (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia,
                  unsigned int map, int nr_bytes, address_word addr,
                  transfer_type transfer, sim_core_signals sig)
{
  sim_core_signal (sd, current_cpu, cia, map, nr_bytes, addr,
		   transfer, sig);
}


/* Initialize cycle counting for an insn.
   FIRST_P is non-zero if this is the first insn in a set of parallel
   insns.  */

void
sh64_compact_model_insn_before (SIM_CPU *cpu, int first_p)
{
  /* Do nothing.  */
}

void
sh64_media_model_insn_before (SIM_CPU *cpu, int first_p)
{
  /* Do nothing.  */
}

/* 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
sh64_compact_model_insn_after(SIM_CPU *cpu, int last_p, int cycles)
{
  /* Do nothing.  */
}

void
sh64_media_model_insn_after(SIM_CPU *cpu, int last_p, int cycles)
{
  /* Do nothing.  */
}

int
sh64_fetch_register (SIM_CPU *cpu, int nr, unsigned char *buf, int len)
{
  /* Fetch general purpose registers. */
  if (nr >= SIM_SH64_R0_REGNUM
      && nr < (SIM_SH64_R0_REGNUM + SIM_SH64_NR_R_REGS)
      && len == 8)
    {
      *((unsigned64*) buf) =
	H2T_8 (sh64_h_gr_get (cpu, nr - SIM_SH64_R0_REGNUM));
      return len;
    }

  /* Fetch PC.  */
  if (nr == SIM_SH64_PC_REGNUM && len == 8)
    {
      *((unsigned64*) buf) = H2T_8 (sh64_h_pc_get (cpu) | sh64_h_ism_get (cpu));
      return len;
    }

  /* Fetch status register (SR).  */
  if (nr == SIM_SH64_SR_REGNUM && len == 8)
    {
      *((unsigned64*) buf) = H2T_8 (sh64_h_sr_get (cpu));
      return len;
    }
      
  /* Fetch saved status register (SSR) and PC (SPC).  */
  if ((nr == SIM_SH64_SSR_REGNUM || nr == SIM_SH64_SPC_REGNUM)
      && len == 8)
    {
      *((unsigned64*) buf) = 0;
      return len;
    }

  /* Fetch target registers.  */
  if (nr >= SIM_SH64_TR0_REGNUM
      && nr < (SIM_SH64_TR0_REGNUM + SIM_SH64_NR_TR_REGS)
      && len == 8)
    {
      *((unsigned64*) buf) =
	H2T_8 (sh64_h_tr_get (cpu, nr - SIM_SH64_TR0_REGNUM));
      return len;
    }

  /* Fetch floating point registers.  */
  if (nr >= SIM_SH64_FR0_REGNUM
      && nr < (SIM_SH64_FR0_REGNUM + SIM_SH64_NR_FP_REGS)
      && len == 4)
    {
      *((unsigned32*) buf) =
	H2T_4 (sh64_h_fr_get (cpu, nr - SIM_SH64_FR0_REGNUM));
      return len;
    }

  /* We should never get here.  */
  return 0;
}

int
sh64_store_register (SIM_CPU *cpu, int nr, unsigned char *buf, int len)
{
  /* Store general purpose registers. */
  if (nr >= SIM_SH64_R0_REGNUM
      && nr < (SIM_SH64_R0_REGNUM + SIM_SH64_NR_R_REGS)
      && len == 8)
    {
      sh64_h_gr_set (cpu, nr - SIM_SH64_R0_REGNUM, T2H_8 (*((unsigned64*)buf)));
      return len;
    }

  /* Store PC.  */
  if (nr == SIM_SH64_PC_REGNUM && len == 8)
    {
      unsigned64 new_pc = T2H_8 (*((unsigned64*)buf));
      sh64_h_pc_set (cpu, new_pc);
      return len;
    }

  /* Store status register (SR).  */
  if (nr == SIM_SH64_SR_REGNUM && len == 8)
    {
      sh64_h_sr_set (cpu, T2H_8 (*((unsigned64*)buf)));
      return len;
    }

  /* Store saved status register (SSR) and PC (SPC).  */
  if (nr == SIM_SH64_SSR_REGNUM || nr == SIM_SH64_SPC_REGNUM)
    {
      /* Do nothing.  */
      return len;
    }

  /* Store target registers.  */
  if (nr >= SIM_SH64_TR0_REGNUM
      && nr < (SIM_SH64_TR0_REGNUM + SIM_SH64_NR_TR_REGS)
      && len == 8)
    {
      sh64_h_tr_set (cpu, nr - SIM_SH64_TR0_REGNUM, T2H_8 (*((unsigned64*)buf)));
      return len;
    }

  /* Store floating point registers.  */
  if (nr >= SIM_SH64_FR0_REGNUM
      && nr < (SIM_SH64_FR0_REGNUM + SIM_SH64_NR_FP_REGS)
      && len == 4)
    {
      sh64_h_fr_set (cpu, nr - SIM_SH64_FR0_REGNUM, T2H_4 (*((unsigned32*)buf)));
      return len;
    }

  /* We should never get here.  */
  return 0;
}

void
sh64_engine_run_full(SIM_CPU *cpu)
{
  if (sh64_h_ism_get (cpu) == ISM_MEDIA)
    {
      if (!sh64_idesc_media)
	{
	  sh64_media_init_idesc_table (cpu);
	  sh64_idesc_media = CPU_IDESC (cpu);
	}
      else
	CPU_IDESC (cpu) = sh64_idesc_media;
      sh64_media_engine_run_full (cpu);
    }
  else
    {
      if (!sh64_idesc_compact)
	{
	  sh64_compact_init_idesc_table (cpu);
	  sh64_idesc_compact = CPU_IDESC (cpu);
	}
      else
	CPU_IDESC (cpu) = sh64_idesc_compact;
      sh64_compact_engine_run_full (cpu);
    }
}

void
sh64_engine_run_fast (SIM_CPU *cpu)
{
  if (sh64_h_ism_get (cpu) == ISM_MEDIA)
    {
      if (!sh64_idesc_media)
	{
	  sh64_media_init_idesc_table (cpu);
	  sh64_idesc_media = CPU_IDESC (cpu);
	}
      else
	CPU_IDESC (cpu) = sh64_idesc_media;
      sh64_media_engine_run_fast (cpu);
    }
  else
    {
      if (!sh64_idesc_compact)
	{
	  sh64_compact_init_idesc_table (cpu);
	  sh64_idesc_compact = CPU_IDESC (cpu);
	}
      else
	CPU_IDESC (cpu) = sh64_idesc_compact;
      sh64_compact_engine_run_fast (cpu);
    }
}

static void
sh64_prepare_run (SIM_CPU *cpu)
{
  /* Nothing.  */
}

static const CGEN_INSN *
sh64_get_idata (SIM_CPU *cpu, int inum)
{
  return CPU_IDESC (cpu) [inum].idata;
}

static void
sh64_init_cpu (SIM_CPU *cpu)
{
  CPU_REG_FETCH (cpu) = sh64_fetch_register;
  CPU_REG_STORE (cpu) = sh64_store_register;
  CPU_PC_FETCH (cpu) = sh64_h_pc_get;
  CPU_PC_STORE (cpu) = sh64_h_pc_set;
  CPU_GET_IDATA (cpu) = sh64_get_idata;
  /* Only used by profiling.  0 disables it. */
  CPU_MAX_INSNS (cpu) = 0;
  CPU_INSN_NAME (cpu) = cgen_insn_name;
  CPU_FULL_ENGINE_FN (cpu) = sh64_engine_run_full;
#if WITH_FAST
  CPU_FAST_ENGINE_FN (cpu) = sh64_engine_run_fast;
#else
  CPU_FAST_ENGINE_FN (cpu) = sh64_engine_run_full;
#endif
}

static void
shmedia_init_cpu (SIM_CPU *cpu)
{
  sh64_init_cpu (cpu);
}

static void
shcompact_init_cpu (SIM_CPU *cpu)
{ 
  sh64_init_cpu (cpu);
}

static void
sh64_model_init()
{
  /* Do nothing.  */
}

static const MODEL sh_models [] =
{
  { "sh2",        & sh2_mach,         MODEL_SH5, NULL, sh64_model_init },
  { "sh2e",       & sh2e_mach,        MODEL_SH5, NULL, sh64_model_init },
  { "sh2a",       & sh2a_fpu_mach,    MODEL_SH5, NULL, sh64_model_init },
  { "sh2a_nofpu", & sh2a_nofpu_mach,  MODEL_SH5, NULL, sh64_model_init },
  { "sh3",        & sh3_mach,         MODEL_SH5, NULL, sh64_model_init },
  { "sh3e",       & sh3_mach,         MODEL_SH5, NULL, sh64_model_init },
  { "sh4",        & sh4_mach,         MODEL_SH5, NULL, sh64_model_init },
  { "sh4_nofpu",  & sh4_nofpu_mach,   MODEL_SH5, NULL, sh64_model_init },
  { "sh4a",       & sh4a_mach,        MODEL_SH5, NULL, sh64_model_init },
  { "sh4a_nofpu", & sh4a_nofpu_mach,  MODEL_SH5, NULL, sh64_model_init },
  { "sh4al",      & sh4al_mach,       MODEL_SH5, NULL, sh64_model_init },
  { "sh5",        & sh5_mach,         MODEL_SH5, NULL, sh64_model_init },
  { 0 }
};

static const MACH_IMP_PROPERTIES sh5_imp_properties =
{
  sizeof (SIM_CPU),
#if WITH_SCACHE
  sizeof (SCACHE)
#else
  0
#endif
};

const MACH sh2_mach =
{
  "sh2", "sh2", MACH_SH5,
  16, 16, &sh_models[0], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh2e_mach =
{
  "sh2e", "sh2e", MACH_SH5,
  16, 16, &sh_models[1], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh2a_fpu_mach =
{
  "sh2a", "sh2a", MACH_SH5,
  16, 16, &sh_models[2], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh2a_nofpu_mach =
{
  "sh2a_nofpu", "sh2a_nofpu", MACH_SH5,
  16, 16, &sh_models[3], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh3_mach =
{
  "sh3", "sh3", MACH_SH5,
  16, 16, &sh_models[4], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh3e_mach =
{
  "sh3e", "sh3e", MACH_SH5,
  16, 16, &sh_models[5], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh4_mach =
{
  "sh4", "sh4", MACH_SH5,
  16, 16, &sh_models[6], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh4_nofpu_mach =
{
  "sh4_nofpu", "sh4_nofpu", MACH_SH5,
  16, 16, &sh_models[7], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh4a_mach =
{
  "sh4a", "sh4a", MACH_SH5,
  16, 16, &sh_models[8], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh4a_nofpu_mach =
{
  "sh4a_nofpu", "sh4a_nofpu", MACH_SH5,
  16, 16, &sh_models[9], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh4al_mach =
{
  "sh4al", "sh4al", MACH_SH5,
  16, 16, &sh_models[10], &sh5_imp_properties,
  shcompact_init_cpu,
  sh64_prepare_run
};

const MACH sh5_mach =
{
  "sh5", "sh5", MACH_SH5,
  32, 32, &sh_models[11], &sh5_imp_properties,
  shmedia_init_cpu,
  sh64_prepare_run
};