xref: /netbsd/external/gpl3/gdb/dist/sim/v850/simops.c (revision 66e63ce3)

#include "sim-main.h"
#include "v850_sim.h"
#include "simops.h"

#include <sys/types.h>

#ifdef HAVE_UTIME_H
#include <utime.h>
#endif

#ifdef HAVE_TIME_H
#include <time.h>
#endif

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef HAVE_STRING_H
#include <string.h>
#else
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#endif

#include "targ-vals.h"

#include "libiberty.h"

#include <errno.h>
#if !defined(__GO32__) && !defined(_WIN32)
#include <sys/stat.h>
#include <sys/times.h>
#include <sys/time.h>
#endif

/* This is an array of the bit positions of registers r20 .. r31 in
   that order in a prepare/dispose instruction.  */
int type1_regs[12] = { 27, 26, 25, 24, 31, 30, 29, 28, 23, 22, 0, 21 };
/* This is an array of the bit positions of registers r16 .. r31 in
   that order in a push/pop instruction.  */
int type2_regs[16] = { 3, 2, 1, 0, 27, 26, 25, 24, 31, 30, 29, 28, 23, 22, 20, 21};
/* This is an array of the bit positions of registers r1 .. r15 in
   that order in a push/pop instruction.  */
int type3_regs[15] = { 2, 1, 0, 27, 26, 25, 24, 31, 30, 29, 28, 23, 22, 20, 21};

#ifdef DEBUG
#ifndef SIZE_INSTRUCTION
#define SIZE_INSTRUCTION 18
#endif

#ifndef SIZE_VALUES
#define SIZE_VALUES 11
#endif


unsigned32 trace_values[3];
int trace_num_values;
unsigned32 trace_pc;
const char *trace_name;
int trace_module;


void
trace_input (name, type, size)
     char *name;
     enum op_types type;
     int size;
{

  if (!TRACE_ALU_P (STATE_CPU (simulator, 0)))
    return;

  trace_pc = PC;
  trace_name = name;
  trace_module = TRACE_ALU_IDX;

  switch (type)
    {
    default:
    case OP_UNKNOWN:
    case OP_NONE:
    case OP_TRAP:
      trace_num_values = 0;
      break;

    case OP_REG:
    case OP_REG_REG_MOVE:
      trace_values[0] = State.regs[OP[0]];
      trace_num_values = 1;
      break;

    case OP_BIT_CHANGE:
    case OP_REG_REG:
    case OP_REG_REG_CMP:
      trace_values[0] = State.regs[OP[1]];
      trace_values[1] = State.regs[OP[0]];
      trace_num_values = 2;
      break;

    case OP_IMM_REG:
    case OP_IMM_REG_CMP:
      trace_values[0] = SEXT5 (OP[0]);
      trace_values[1] = OP[1];
      trace_num_values = 2;
      break;

    case OP_IMM_REG_MOVE:
      trace_values[0] = SEXT5 (OP[0]);
      trace_num_values = 1;
      break;

    case OP_COND_BR:
      trace_values[0] = State.pc;
      trace_values[1] = SEXT9 (OP[0]);
      trace_values[2] = PSW;
      trace_num_values = 3;
      break;

    case OP_LOAD16:
      trace_values[0] = OP[1] * size;
      trace_values[1] = State.regs[30];
      trace_num_values = 2;
      break;

    case OP_STORE16:
      trace_values[0] = State.regs[OP[0]];
      trace_values[1] = OP[1] * size;
      trace_values[2] = State.regs[30];
      trace_num_values = 3;
      break;

    case OP_LOAD32:
      trace_values[0] = EXTEND16 (OP[2]);
      trace_values[1] = State.regs[OP[0]];
      trace_num_values = 2;
      break;

    case OP_STORE32:
      trace_values[0] = State.regs[OP[1]];
      trace_values[1] = EXTEND16 (OP[2]);
      trace_values[2] = State.regs[OP[0]];
      trace_num_values = 3;
      break;

    case OP_JUMP:
      trace_values[0] = SEXT22 (OP[0]);
      trace_values[1] = State.pc;
      trace_num_values = 2;
      break;

    case OP_IMM_REG_REG:
      trace_values[0] = EXTEND16 (OP[0]) << size;
      trace_values[1] = State.regs[OP[1]];
      trace_num_values = 2;
      break;

    case OP_IMM16_REG_REG:
      trace_values[0] = EXTEND16 (OP[2]) << size;
      trace_values[1] = State.regs[OP[1]];
      trace_num_values = 2;
      break;

    case OP_UIMM_REG_REG:
      trace_values[0] = (OP[0] & 0xffff) << size;
      trace_values[1] = State.regs[OP[1]];
      trace_num_values = 2;
      break;

    case OP_UIMM16_REG_REG:
      trace_values[0] = (OP[2]) << size;
      trace_values[1] = State.regs[OP[1]];
      trace_num_values = 2;
      break;

    case OP_BIT:
      trace_num_values = 0;
      break;

    case OP_EX1:
      trace_values[0] = PSW;
      trace_num_values = 1;
      break;

    case OP_EX2:
      trace_num_values = 0;
      break;

    case OP_LDSR:
      trace_values[0] = State.regs[OP[0]];
      trace_num_values = 1;
      break;

    case OP_STSR:
      trace_values[0] = State.sregs[OP[1]];
      trace_num_values = 1;
    }

}

void
trace_result (int has_result, unsigned32 result)
{
  char buf[1000];
  char *chp;

  buf[0] = '\0';
  chp = buf;

  /* write out the values saved during the trace_input call */
  {
    int i;
    for (i = 0; i < trace_num_values; i++)
      {
	sprintf (chp, "%*s0x%.8lx", SIZE_VALUES - 10, "",
		 (long) trace_values[i]);
	chp = strchr (chp, '\0');
      }
    while (i++ < 3)
      {
	sprintf (chp, "%*s", SIZE_VALUES, "");
	chp = strchr (chp, '\0');
      }
  }

  /* append any result to the end of the buffer */
  if (has_result)
    sprintf (chp, " :: 0x%.8lx", (unsigned long)result);

  trace_generic (simulator, STATE_CPU (simulator, 0), trace_module, buf);
}

void
trace_output (result)
     enum op_types result;
{
  if (!TRACE_ALU_P (STATE_CPU (simulator, 0)))
    return;

  switch (result)
    {
    default:
    case OP_UNKNOWN:
    case OP_NONE:
    case OP_TRAP:
    case OP_REG:
    case OP_REG_REG_CMP:
    case OP_IMM_REG_CMP:
    case OP_COND_BR:
    case OP_STORE16:
    case OP_STORE32:
    case OP_BIT:
    case OP_EX2:
      trace_result (0, 0);
      break;

    case OP_LOAD16:
    case OP_STSR:
      trace_result (1, State.regs[OP[0]]);
      break;

    case OP_REG_REG:
    case OP_REG_REG_MOVE:
    case OP_IMM_REG:
    case OP_IMM_REG_MOVE:
    case OP_LOAD32:
    case OP_EX1:
      trace_result (1, State.regs[OP[1]]);
      break;

    case OP_IMM_REG_REG:
    case OP_UIMM_REG_REG:
    case OP_IMM16_REG_REG:
    case OP_UIMM16_REG_REG:
      trace_result (1, State.regs[OP[1]]);
      break;

    case OP_JUMP:
      if (OP[1] != 0)
	trace_result (1, State.regs[OP[1]]);
      else
	trace_result (0, 0);
      break;

    case OP_LDSR:
      trace_result (1, State.sregs[OP[1]]);
      break;
    }
}
#endif


/* Returns 1 if the specific condition is met, returns 0 otherwise.  */
int
condition_met (unsigned code)
{
  unsigned int psw = PSW;

  switch (code & 0xf)
    {
      case 0x0: return ((psw & PSW_OV) != 0);
      case 0x1:	return ((psw & PSW_CY) != 0);
      case 0x2:	return ((psw & PSW_Z) != 0);
      case 0x3:	return ((((psw & PSW_CY) != 0) | ((psw & PSW_Z) != 0)) != 0);
      case 0x4:	return ((psw & PSW_S) != 0);
    /*case 0x5:	return 1;*/
      case 0x6: return ((((psw & PSW_S) != 0) ^ ((psw & PSW_OV) != 0)) != 0);
      case 0x7:	return (((((psw & PSW_S) != 0) ^ ((psw & PSW_OV) != 0)) || ((psw & PSW_Z) != 0)) != 0);
      case 0x8:	return ((psw & PSW_OV) == 0);
      case 0x9:	return ((psw & PSW_CY) == 0);
      case 0xa:	return ((psw & PSW_Z) == 0);
      case 0xb:	return ((((psw & PSW_CY) != 0) | ((psw & PSW_Z) != 0)) == 0);
      case 0xc:	return ((psw & PSW_S) == 0);
      case 0xd:	return ((psw & PSW_SAT) != 0);
      case 0xe:	return ((((psw & PSW_S) != 0) ^ ((psw & PSW_OV) != 0)) == 0);
      case 0xf:	return (((((psw & PSW_S) != 0) ^ ((psw & PSW_OV) != 0)) || ((psw & PSW_Z) != 0)) == 0);
    }

  return 1;
}

static unsigned long
Add32 (unsigned long a1, unsigned long a2, int * carry)
{
  unsigned long result = (a1 + a2);

  * carry = (result < a1);

  return result;
}

static void
Multiply64 (int sign, unsigned long op0)
{
  unsigned long op1;
  unsigned long lo;
  unsigned long mid1;
  unsigned long mid2;
  unsigned long hi;
  unsigned long RdLo;
  unsigned long RdHi;
  int           carry;

  op1 = State.regs[ OP[1] ];

  if (sign)
    {
      /* Compute sign of result and adjust operands if necessary.  */

      sign = (op0 ^ op1) & 0x80000000;

      if (((signed long) op0) < 0)
	op0 = - op0;

      if (((signed long) op1) < 0)
	op1 = - op1;
    }

  /* We can split the 32x32 into four 16x16 operations. This ensures
     that we do not lose precision on 32bit only hosts: */
  lo   = ( (op0        & 0xFFFF) *  (op1        & 0xFFFF));
  mid1 = ( (op0        & 0xFFFF) * ((op1 >> 16) & 0xFFFF));
  mid2 = (((op0 >> 16) & 0xFFFF) *  (op1        & 0xFFFF));
  hi   = (((op0 >> 16) & 0xFFFF) * ((op1 >> 16) & 0xFFFF));

  /* We now need to add all of these results together, taking care
     to propogate the carries from the additions: */
  RdLo = Add32 (lo, (mid1 << 16), & carry);
  RdHi = carry;
  RdLo = Add32 (RdLo, (mid2 << 16), & carry);
  RdHi += (carry + ((mid1 >> 16) & 0xFFFF) + ((mid2 >> 16) & 0xFFFF) + hi);

  if (sign)
    {
      /* Negate result if necessary.  */

      RdLo = ~ RdLo;
      RdHi = ~ RdHi;
      if (RdLo == 0xFFFFFFFF)
	{
	  RdLo = 0;
	  RdHi += 1;
	}
      else
	RdLo += 1;
    }

  /* Don't store into register 0.  */
  if (OP[1])
    State.regs[ OP[1]       ] = RdLo;
  if (OP[2] >> 11)
    State.regs[ OP[2] >> 11 ] = RdHi;

  return;
}


/* Read a null terminated string from memory, return in a buffer */
static char *
fetch_str (sd, addr)
     SIM_DESC sd;
     address_word addr;
{
  char *buf;
  int nr = 0;
  while (sim_core_read_1 (STATE_CPU (sd, 0),
			  PC, read_map, addr + nr) != 0)
    nr++;
  buf = NZALLOC (char, nr + 1);
  sim_read (simulator, addr, buf, nr);
  return buf;
}

/* Read a null terminated argument vector from memory, return in a
   buffer */
static char **
fetch_argv (sd, addr)
     SIM_DESC sd;
     address_word addr;
{
  int max_nr = 64;
  int nr = 0;
  char **buf = xmalloc (max_nr * sizeof (char*));
  while (1)
    {
      unsigned32 a = sim_core_read_4 (STATE_CPU (sd, 0),
				      PC, read_map, addr + nr * 4);
      if (a == 0) break;
      buf[nr] = fetch_str (sd, a);
      nr ++;
      if (nr == max_nr - 1)
	{
	  max_nr += 50;
	  buf = xrealloc (buf, max_nr * sizeof (char*));
	}
    }
  buf[nr] = 0;
  return buf;
}


/* sst.b */
int
OP_380 ()
{
  trace_input ("sst.b", OP_STORE16, 1);

  store_mem (State.regs[30] + (OP[3] & 0x7f), 1, State.regs[ OP[1] ]);

  trace_output (OP_STORE16);

  return 2;
}

/* sst.h */
int
OP_480 ()
{
  trace_input ("sst.h", OP_STORE16, 2);

  store_mem (State.regs[30] + ((OP[3] & 0x7f) << 1), 2, State.regs[ OP[1] ]);

  trace_output (OP_STORE16);

  return 2;
}

/* sst.w */
int
OP_501 ()
{
  trace_input ("sst.w", OP_STORE16, 4);

  store_mem (State.regs[30] + ((OP[3] & 0x7e) << 1), 4, State.regs[ OP[1] ]);

  trace_output (OP_STORE16);

  return 2;
}

/* ld.b */
int
OP_700 ()
{
  int adr;

  trace_input ("ld.b", OP_LOAD32, 1);

  adr = State.regs[ OP[0] ] + EXTEND16 (OP[2]);

  State.regs[ OP[1] ] = EXTEND8 (load_mem (adr, 1));

  trace_output (OP_LOAD32);

  return 4;
}

/* ld.h */
int
OP_720 ()
{
  int adr;

  trace_input ("ld.h", OP_LOAD32, 2);

  adr = State.regs[ OP[0] ] + EXTEND16 (OP[2]);
  adr &= ~0x1;

  State.regs[ OP[1] ] = EXTEND16 (load_mem (adr, 2));

  trace_output (OP_LOAD32);

  return 4;
}

/* ld.w */
int
OP_10720 ()
{
  int adr;

  trace_input ("ld.w", OP_LOAD32, 4);

  adr = State.regs[ OP[0] ] + EXTEND16 (OP[2] & ~1);
  adr &= ~0x3;

  State.regs[ OP[1] ] = load_mem (adr, 4);

  trace_output (OP_LOAD32);

  return 4;
}

/* st.b */
int
OP_740 ()
{
  trace_input ("st.b", OP_STORE32, 1);

  store_mem (State.regs[ OP[0] ] + EXTEND16 (OP[2]), 1, State.regs[ OP[1] ]);

  trace_output (OP_STORE32);

  return 4;
}

/* st.h */
int
OP_760 ()
{
  int adr;

  trace_input ("st.h", OP_STORE32, 2);

  adr = State.regs[ OP[0] ] + EXTEND16 (OP[2]);
  adr &= ~1;

  store_mem (adr, 2, State.regs[ OP[1] ]);

  trace_output (OP_STORE32);

  return 4;
}

/* st.w */
int
OP_10760 ()
{
  int adr;

  trace_input ("st.w", OP_STORE32, 4);

  adr = State.regs[ OP[0] ] + EXTEND16 (OP[2] & ~1);
  adr &= ~3;

  store_mem (adr, 4, State.regs[ OP[1] ]);

  trace_output (OP_STORE32);

  return 4;
}

/* add reg, reg */
int
OP_1C0 ()
{
  unsigned int op0, op1, result, z, s, cy, ov;

  trace_input ("add", OP_REG_REG, 0);

  /* Compute the result.  */

  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];

  result = op0 + op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (result < op0 || result < op1);
  ov = ((op0 & 0x80000000) == (op1 & 0x80000000)
	&& (op0 & 0x80000000) != (result & 0x80000000));

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		     | (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0));
  trace_output (OP_REG_REG);

  return 2;
}

/* add sign_extend(imm5), reg */
int
OP_240 ()
{
  unsigned int op0, op1, result, z, s, cy, ov;
  int temp;

  trace_input ("add", OP_IMM_REG, 0);

  /* Compute the result.  */
  temp = SEXT5 (OP[0]);
  op0 = temp;
  op1 = State.regs[OP[1]];
  result = op0 + op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (result < op0 || result < op1);
  ov = ((op0 & 0x80000000) == (op1 & 0x80000000)
	&& (op0 & 0x80000000) != (result & 0x80000000));

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0));
  trace_output (OP_IMM_REG);

  return 2;
}

/* addi sign_extend(imm16), reg, reg */
int
OP_600 ()
{
  unsigned int op0, op1, result, z, s, cy, ov;

  trace_input ("addi", OP_IMM16_REG_REG, 0);

  /* Compute the result.  */

  op0 = EXTEND16 (OP[2]);
  op1 = State.regs[ OP[0] ];
  result = op0 + op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (result < op0 || result < op1);
  ov = ((op0 & 0x80000000) == (op1 & 0x80000000)
	&& (op0 & 0x80000000) != (result & 0x80000000));

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0));
  trace_output (OP_IMM16_REG_REG);

  return 4;
}

/* sub reg1, reg2 */
int
OP_1A0 ()
{
  unsigned int op0, op1, result, z, s, cy, ov;

  trace_input ("sub", OP_REG_REG, 0);
  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];
  result = op1 - op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (op1 < op0);
  ov = ((op1 & 0x80000000) != (op0 & 0x80000000)
	&& (op1 & 0x80000000) != (result & 0x80000000));

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0));
  trace_output (OP_REG_REG);

  return 2;
}

/* subr reg1, reg2 */
int
OP_180 ()
{
  unsigned int op0, op1, result, z, s, cy, ov;

  trace_input ("subr", OP_REG_REG, 0);
  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];
  result = op0 - op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (op0 < op1);
  ov = ((op0 & 0x80000000) != (op1 & 0x80000000)
	&& (op0 & 0x80000000) != (result & 0x80000000));

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0));
  trace_output (OP_REG_REG);

  return 2;
}

/* sxh reg1 */
int
OP_E0 ()
{
  trace_input ("mulh", OP_REG_REG, 0);

  State.regs[ OP[1] ] = (EXTEND16 (State.regs[ OP[1] ]) * EXTEND16 (State.regs[ OP[0] ]));

  trace_output (OP_REG_REG);

  return 2;
}

/* mulh sign_extend(imm5), reg2 */
int
OP_2E0 ()
{
  trace_input ("mulh", OP_IMM_REG, 0);

  State.regs[ OP[1] ] = EXTEND16 (State.regs[ OP[1] ]) * SEXT5 (OP[0]);

  trace_output (OP_IMM_REG);

  return 2;
}

/* mulhi imm16, reg1, reg2 */
int
OP_6E0 ()
{
  trace_input ("mulhi", OP_IMM16_REG_REG, 0);

  State.regs[ OP[1] ] = EXTEND16 (State.regs[ OP[0] ]) * EXTEND16 (OP[2]);

  trace_output (OP_IMM16_REG_REG);

  return 4;
}

/* cmp reg, reg */
int
OP_1E0 ()
{
  unsigned int op0, op1, result, z, s, cy, ov;

  trace_input ("cmp", OP_REG_REG_CMP, 0);
  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];
  result = op1 - op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (op1 < op0);
  ov = ((op1 & 0x80000000) != (op0 & 0x80000000)
	&& (op1 & 0x80000000) != (result & 0x80000000));

  /* Set condition codes.  */
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0));
  trace_output (OP_REG_REG_CMP);

  return 2;
}

/* cmp sign_extend(imm5), reg */
int
OP_260 ()
{
  unsigned int op0, op1, result, z, s, cy, ov;
  int temp;

  /* Compute the result.  */
  trace_input ("cmp", OP_IMM_REG_CMP, 0);
  temp = SEXT5 (OP[0]);
  op0 = temp;
  op1 = State.regs[OP[1]];
  result = op1 - op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (op1 < op0);
  ov = ((op1 & 0x80000000) != (op0 & 0x80000000)
	&& (op1 & 0x80000000) != (result & 0x80000000));

  /* Set condition codes.  */
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0));
  trace_output (OP_IMM_REG_CMP);

  return 2;
}

/* setf cccc,reg2 */
int
OP_7E0 ()
{
  trace_input ("setf", OP_EX1, 0);

  State.regs[ OP[1] ] = condition_met (OP[0]);

  trace_output (OP_EX1);

  return 4;
}

/* satadd reg,reg */
int
OP_C0 ()
{
  unsigned int op0, op1, result, z, s, cy, ov, sat;

  trace_input ("satadd", OP_REG_REG, 0);
  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];
  result = op0 + op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (result < op0 || result < op1);
  ov = ((op0 & 0x80000000) == (op1 & 0x80000000)
	&& (op0 & 0x80000000) != (result & 0x80000000));
  sat = ov;

  /* Handle saturated results.  */
  if (sat && s)
    {
      /* An overflow that results in a negative result implies that we
	 became too positive.  */
      result = 0x7fffffff;
      s = 0;
    }
  else if (sat)
    {
      /* Any other overflow must have thus been too negative.  */
      result = 0x80000000;
      s = 1;
      z = 0;
    }

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
	  | (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0)
	  | (sat ? PSW_SAT : 0));

  trace_output (OP_REG_REG);

  return 2;
}

/* satadd sign_extend(imm5), reg */
int
OP_220 ()
{
  unsigned int op0, op1, result, z, s, cy, ov, sat;

  int temp;

  trace_input ("satadd", OP_IMM_REG, 0);

  /* Compute the result.  */
  temp = SEXT5 (OP[0]);
  op0 = temp;
  op1 = State.regs[OP[1]];
  result = op0 + op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (result < op0 || result < op1);
  ov = ((op0 & 0x80000000) == (op1 & 0x80000000)
	&& (op0 & 0x80000000) != (result & 0x80000000));
  sat = ov;

  /* Handle saturated results.  */
  if (sat && s)
    {
      /* An overflow that results in a negative result implies that we
	 became too positive.  */
      result = 0x7fffffff;
      s = 0;
    }
  else if (sat)
    {
      /* Any other overflow must have thus been too negative.  */
      result = 0x80000000;
      s = 1;
      z = 0;
    }

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0)
		| (sat ? PSW_SAT : 0));
  trace_output (OP_IMM_REG);

  return 2;
}

/* satsub reg1, reg2 */
int
OP_A0 ()
{
  unsigned int op0, op1, result, z, s, cy, ov, sat;

  trace_input ("satsub", OP_REG_REG, 0);

  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];
  result = op1 - op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (op1 < op0);
  ov = ((op1 & 0x80000000) != (op0 & 0x80000000)
	&& (op1 & 0x80000000) != (result & 0x80000000));
  sat = ov;

  /* Handle saturated results.  */
  if (sat && s)
    {
      /* An overflow that results in a negative result implies that we
	 became too positive.  */
      result = 0x7fffffff;
      s = 0;
    }
  else if (sat)
    {
      /* Any other overflow must have thus been too negative.  */
      result = 0x80000000;
      s = 1;
      z = 0;
    }

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
	  | (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0)
	  | (sat ? PSW_SAT : 0));

  trace_output (OP_REG_REG);
  return 2;
}

/* satsubi sign_extend(imm16), reg */
int
OP_660 ()
{
  unsigned int op0, op1, result, z, s, cy, ov, sat;
  int temp;

  trace_input ("satsubi", OP_IMM_REG, 0);

  /* Compute the result.  */
  temp = EXTEND16 (OP[2]);
  op0 = temp;
  op1 = State.regs[ OP[0] ];
  result = op1 - op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (op1 < op0);
  ov = ((op1 & 0x80000000) != (op0 & 0x80000000)
	&& (op1 & 0x80000000) != (result & 0x80000000));
  sat = ov;

  /* Handle saturated results.  */
  if (sat && s)
    {
      /* An overflow that results in a negative result implies that we
	 became too positive.  */
      result = 0x7fffffff;
      s = 0;
    }
  else if (sat)
    {
      /* Any other overflow must have thus been too negative.  */
      result = 0x80000000;
      s = 1;
      z = 0;
    }

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0)
		| (sat ? PSW_SAT : 0));

  trace_output (OP_IMM_REG);

  return 4;
}

/* satsubr reg,reg */
int
OP_80 ()
{
  unsigned int op0, op1, result, z, s, cy, ov, sat;

  trace_input ("satsubr", OP_REG_REG, 0);

  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];
  result = op0 - op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = (op0 < op1);
  ov = ((op0 & 0x80000000) != (op1 & 0x80000000)
	&& (op0 & 0x80000000) != (result & 0x80000000));
  sat = ov;

  /* Handle saturated results.  */
  if (sat && s)
    {
      /* An overflow that results in a negative result implies that we
	 became too positive.  */
      result = 0x7fffffff;
      s = 0;
    }
  else if (sat)
    {
      /* Any other overflow must have thus been too negative.  */
      result = 0x80000000;
      s = 1;
      z = 0;
    }

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_CY | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
	  | (cy ? PSW_CY : 0) | (ov ? PSW_OV : 0)
	  | (sat ? PSW_SAT : 0));

  trace_output (OP_REG_REG);

  return 2;
}

/* tst reg,reg */
int
OP_160 ()
{
  unsigned int op0, op1, result, z, s;

  trace_input ("tst", OP_REG_REG_CMP, 0);

  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];
  result = op0 & op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);

  /* Store the condition codes.  */
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0));
  trace_output (OP_REG_REG_CMP);

  return 2;
}

/* mov sign_extend(imm5), reg */
int
OP_200 ()
{
  int value = SEXT5 (OP[0]);

  trace_input ("mov", OP_IMM_REG_MOVE, 0);

  State.regs[ OP[1] ] = value;

  trace_output (OP_IMM_REG_MOVE);

  return 2;
}

/* movhi imm16, reg, reg */
int
OP_640 ()
{
  trace_input ("movhi", OP_UIMM16_REG_REG, 16);

  State.regs[ OP[1] ] = State.regs[ OP[0] ] + (OP[2] << 16);

  trace_output (OP_UIMM16_REG_REG);

  return 4;
}

/* sar zero_extend(imm5),reg1 */
int
OP_2A0 ()
{
  unsigned int op0, op1, result, z, s, cy;

  trace_input ("sar", OP_IMM_REG, 0);
  op0 = OP[0];
  op1 = State.regs[ OP[1] ];
  result = (signed)op1 >> op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = op0 ? (op1 & (1 << (op0 - 1))) : 0;

  /* Store the result and condition codes.  */
  State.regs[ OP[1] ] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV | PSW_CY);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0));
  trace_output (OP_IMM_REG);

  return 2;
}

/* sar reg1, reg2 */
int
OP_A007E0 ()
{
  unsigned int op0, op1, result, z, s, cy;

  trace_input ("sar", OP_REG_REG, 0);

  op0 = State.regs[ OP[0] ] & 0x1f;
  op1 = State.regs[ OP[1] ];
  result = (signed)op1 >> op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = op0 ? (op1 & (1 << (op0 - 1))) : 0;

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV | PSW_CY);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0));
  trace_output (OP_REG_REG);

  return 4;
}

/* shl zero_extend(imm5),reg1 */
int
OP_2C0 ()
{
  unsigned int op0, op1, result, z, s, cy;

  trace_input ("shl", OP_IMM_REG, 0);
  op0 = OP[0];
  op1 = State.regs[ OP[1] ];
  result = op1 << op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = op0 ? (op1 & (1 << (32 - op0))) : 0;

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV | PSW_CY);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0));
  trace_output (OP_IMM_REG);

  return 2;
}

/* shl reg1, reg2 */
int
OP_C007E0 ()
{
  unsigned int op0, op1, result, z, s, cy;

  trace_input ("shl", OP_REG_REG, 0);
  op0 = State.regs[ OP[0] ] & 0x1f;
  op1 = State.regs[ OP[1] ];
  result = op1 << op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = op0 ? (op1 & (1 << (32 - op0))) : 0;

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV | PSW_CY);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0));
  trace_output (OP_REG_REG);

  return 4;
}

/* shr zero_extend(imm5),reg1 */
int
OP_280 ()
{
  unsigned int op0, op1, result, z, s, cy;

  trace_input ("shr", OP_IMM_REG, 0);
  op0 = OP[0];
  op1 = State.regs[ OP[1] ];
  result = op1 >> op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = op0 ? (op1 & (1 << (op0 - 1))) : 0;

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV | PSW_CY);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0));
  trace_output (OP_IMM_REG);

  return 2;
}

/* shr reg1, reg2 */
int
OP_8007E0 ()
{
  unsigned int op0, op1, result, z, s, cy;

  trace_input ("shr", OP_REG_REG, 0);
  op0 = State.regs[ OP[0] ] & 0x1f;
  op1 = State.regs[ OP[1] ];
  result = op1 >> op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);
  cy = op0 ? (op1 & (1 << (op0 - 1))) : 0;

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV | PSW_CY);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0)
		| (cy ? PSW_CY : 0));
  trace_output (OP_REG_REG);

  return 4;
}

/* or reg, reg */
int
OP_100 ()
{
  unsigned int op0, op1, result, z, s;

  trace_input ("or", OP_REG_REG, 0);

  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];
  result = op0 | op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0));
  trace_output (OP_REG_REG);

  return 2;
}

/* ori zero_extend(imm16), reg, reg */
int
OP_680 ()
{
  unsigned int op0, op1, result, z, s;

  trace_input ("ori", OP_UIMM16_REG_REG, 0);
  op0 = OP[2];
  op1 = State.regs[ OP[0] ];
  result = op0 | op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0));
  trace_output (OP_UIMM16_REG_REG);

  return 4;
}

/* and reg, reg */
int
OP_140 ()
{
  unsigned int op0, op1, result, z, s;

  trace_input ("and", OP_REG_REG, 0);

  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];
  result = op0 & op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0));
  trace_output (OP_REG_REG);

  return 2;
}

/* andi zero_extend(imm16), reg, reg */
int
OP_6C0 ()
{
  unsigned int result, z;

  trace_input ("andi", OP_UIMM16_REG_REG, 0);

  result = OP[2] & State.regs[ OP[0] ];

  /* Compute the condition codes.  */
  z = (result == 0);

  /* Store the result and condition codes.  */
  State.regs[ OP[1] ] = result;

  PSW &= ~(PSW_Z | PSW_S | PSW_OV);
  PSW |= (z ? PSW_Z : 0);

  trace_output (OP_UIMM16_REG_REG);

  return 4;
}

/* xor reg, reg */
int
OP_120 ()
{
  unsigned int op0, op1, result, z, s;

  trace_input ("xor", OP_REG_REG, 0);

  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  op1 = State.regs[ OP[1] ];
  result = op0 ^ op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0));
  trace_output (OP_REG_REG);

  return 2;
}

/* xori zero_extend(imm16), reg, reg */
int
OP_6A0 ()
{
  unsigned int op0, op1, result, z, s;

  trace_input ("xori", OP_UIMM16_REG_REG, 0);
  op0 = OP[2];
  op1 = State.regs[ OP[0] ];
  result = op0 ^ op1;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0));
  trace_output (OP_UIMM16_REG_REG);

  return 4;
}

/* not reg1, reg2 */
int
OP_20 ()
{
  unsigned int op0, result, z, s;

  trace_input ("not", OP_REG_REG_MOVE, 0);
  /* Compute the result.  */
  op0 = State.regs[ OP[0] ];
  result = ~op0;

  /* Compute the condition codes.  */
  z = (result == 0);
  s = (result & 0x80000000);

  /* Store the result and condition codes.  */
  State.regs[OP[1]] = result;
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);
  PSW |= ((z ? PSW_Z : 0) | (s ? PSW_S : 0));
  trace_output (OP_REG_REG_MOVE);

  return 2;
}

/* set1 */
int
OP_7C0 ()
{
  unsigned int op0, op1, op2;
  int temp;

  trace_input ("set1", OP_BIT, 0);
  op0 = State.regs[ OP[0] ];
  op1 = OP[1] & 0x7;
  temp = EXTEND16 (OP[2]);
  op2 = temp;
  temp = load_mem (op0 + op2, 1);
  PSW &= ~PSW_Z;
  if ((temp & (1 << op1)) == 0)
    PSW |= PSW_Z;
  temp |= (1 << op1);
  store_mem (op0 + op2, 1, temp);
  trace_output (OP_BIT);

  return 4;
}

/* not1 */
int
OP_47C0 ()
{
  unsigned int op0, op1, op2;
  int temp;

  trace_input ("not1", OP_BIT, 0);
  op0 = State.regs[ OP[0] ];
  op1 = OP[1] & 0x7;
  temp = EXTEND16 (OP[2]);
  op2 = temp;
  temp = load_mem (op0 + op2, 1);
  PSW &= ~PSW_Z;
  if ((temp & (1 << op1)) == 0)
    PSW |= PSW_Z;
  temp ^= (1 << op1);
  store_mem (op0 + op2, 1, temp);
  trace_output (OP_BIT);

  return 4;
}

/* clr1 */
int
OP_87C0 ()
{
  unsigned int op0, op1, op2;
  int temp;

  trace_input ("clr1", OP_BIT, 0);
  op0 = State.regs[ OP[0] ];
  op1 = OP[1] & 0x7;
  temp = EXTEND16 (OP[2]);
  op2 = temp;
  temp = load_mem (op0 + op2, 1);
  PSW &= ~PSW_Z;
  if ((temp & (1 << op1)) == 0)
    PSW |= PSW_Z;
  temp &= ~(1 << op1);
  store_mem (op0 + op2, 1, temp);
  trace_output (OP_BIT);

  return 4;
}

/* tst1 */
int
OP_C7C0 ()
{
  unsigned int op0, op1, op2;
  int temp;

  trace_input ("tst1", OP_BIT, 0);
  op0 = State.regs[ OP[0] ];
  op1 = OP[1] & 0x7;
  temp = EXTEND16 (OP[2]);
  op2 = temp;
  temp = load_mem (op0 + op2, 1);
  PSW &= ~PSW_Z;
  if ((temp & (1 << op1)) == 0)
    PSW |= PSW_Z;
  trace_output (OP_BIT);

  return 4;
}

/* di */
int
OP_16007E0 ()
{
  trace_input ("di", OP_NONE, 0);
  PSW |= PSW_ID;
  trace_output (OP_NONE);

  return 4;
}

/* ei */
int
OP_16087E0 ()
{
  trace_input ("ei", OP_NONE, 0);
  PSW &= ~PSW_ID;
  trace_output (OP_NONE);

  return 4;
}

/* halt */
int
OP_12007E0 ()
{
  trace_input ("halt", OP_NONE, 0);
  /* FIXME this should put processor into a mode where NMI still handled */
  trace_output (OP_NONE);
  sim_engine_halt (simulator, STATE_CPU (simulator, 0), NULL, PC,
		   sim_stopped, SIM_SIGTRAP);
  return 0;
}

/* trap */
int
OP_10007E0 ()
{
  trace_input ("trap", OP_TRAP, 0);
  trace_output (OP_TRAP);

  /* Trap 31 is used for simulating OS I/O functions */

  if (OP[0] == 31)
    {
      int save_errno = errno;
      errno = 0;

/* Registers passed to trap 0 */

#define FUNC   State.regs[6]	/* function number, return value */
#define PARM1  State.regs[7]	/* optional parm 1 */
#define PARM2  State.regs[8]	/* optional parm 2 */
#define PARM3  State.regs[9]	/* optional parm 3 */

/* Registers set by trap 0 */

#define RETVAL State.regs[10]	/* return value */
#define RETERR State.regs[11]	/* return error code */

/* Turn a pointer in a register into a pointer into real memory. */

#define MEMPTR(x) (map (x))

      RETERR = 0;

      switch (FUNC)
	{

#ifdef HAVE_FORK
#ifdef TARGET_SYS_fork
	case TARGET_SYS_fork:
	  RETVAL = fork ();
	  RETERR = errno;
	  break;
#endif
#endif

#ifdef HAVE_EXECVE
#ifdef TARGET_SYS_execv
	case TARGET_SYS_execve:
	  {
	    char *path = fetch_str (simulator, PARM1);
	    char **argv = fetch_argv (simulator, PARM2);
	    char **envp = fetch_argv (simulator, PARM3);
	    RETVAL = execve (path, argv, envp);
	    free (path);
	    freeargv (argv);
	    freeargv (envp);
	    RETERR = errno;
	    break;
	  }
#endif
#endif

#if HAVE_EXECV
#ifdef TARGET_SYS_execv
	case TARGET_SYS_execv:
	  {
	    char *path = fetch_str (simulator, PARM1);
	    char **argv = fetch_argv (simulator, PARM2);
	    RETVAL = execv (path, argv);
	    free (path);
	    freeargv (argv);
	    RETERR = errno;
	    break;
	  }
#endif
#endif

#if 0
#ifdef TARGET_SYS_pipe
	case TARGET_SYS_pipe:
	  {
	    reg_t buf;
	    int host_fd[2];

	    buf = PARM1;
	    RETVAL = pipe (host_fd);
	    SW (buf, host_fd[0]);
	    buf += sizeof(uint16);
	    SW (buf, host_fd[1]);
	    RETERR = errno;
	  }
	  break;
#endif
#endif

#if 0
#ifdef TARGET_SYS_wait
	case TARGET_SYS_wait:
	  {
	    int status;

	    RETVAL = wait (&status);
	    SW (PARM1, status);
	    RETERR = errno;
	  }
	  break;
#endif
#endif

#ifdef TARGET_SYS_read
	case TARGET_SYS_read:
	  {
	    char *buf = zalloc (PARM3);
	    RETVAL = sim_io_read (simulator, PARM1, buf, PARM3);
	    sim_write (simulator, PARM2, buf, PARM3);
	    free (buf);
	    if ((int) RETVAL < 0)
	      RETERR = sim_io_get_errno (simulator);
	    break;
	  }
#endif

#ifdef TARGET_SYS_write
	case TARGET_SYS_write:
	  {
	    char *buf = zalloc (PARM3);
	    sim_read (simulator, PARM2, buf, PARM3);
	    if (PARM1 == 1)
	      RETVAL = sim_io_write_stdout (simulator, buf, PARM3);
	    else
	      RETVAL = sim_io_write (simulator, PARM1, buf, PARM3);
	    free (buf);
	    if ((int) RETVAL < 0)
	      RETERR = sim_io_get_errno (simulator);
	    break;
	  }
#endif

#ifdef TARGET_SYS_lseek
	case TARGET_SYS_lseek:
	  RETVAL = sim_io_lseek (simulator, PARM1, PARM2, PARM3);
	  if ((int) RETVAL < 0)
	    RETERR = sim_io_get_errno (simulator);
	  break;
#endif

#ifdef TARGET_SYS_close
	case TARGET_SYS_close:
	  RETVAL = sim_io_close (simulator, PARM1);
	  if ((int) RETVAL < 0)
	    RETERR = sim_io_get_errno (simulator);
	  break;
#endif

#ifdef TARGET_SYS_open
	case TARGET_SYS_open:
	  {
	    char *buf = fetch_str (simulator, PARM1);
	    RETVAL = sim_io_open (simulator, buf, PARM2);
	    free (buf);
	    if ((int) RETVAL < 0)
	      RETERR = sim_io_get_errno (simulator);
	    break;
	  }
#endif

#ifdef TARGET_SYS_exit
	case TARGET_SYS_exit:
	  if ((PARM1 & 0xffff0000) == 0xdead0000 && (PARM1 & 0xffff) != 0)
	    /* get signal encoded by kill */
	    sim_engine_halt (simulator, STATE_CPU (simulator, 0), NULL, PC,
			     sim_signalled, PARM1 & 0xffff);
	  else if (PARM1 == 0xdead)
	    /* old libraries */
	    sim_engine_halt (simulator, STATE_CPU (simulator, 0), NULL, PC,
			     sim_stopped, SIM_SIGABRT);
	  else
	    /* PARM1 has exit status */
	    sim_engine_halt (simulator, STATE_CPU (simulator, 0), NULL, PC,
			     sim_exited, PARM1);
	  break;
#endif

#ifdef TARGET_SYS_stat
	case TARGET_SYS_stat:	/* added at hmsi */
	  /* stat system call */
	  {
	    struct stat host_stat;
	    reg_t buf;
	    char *path = fetch_str (simulator, PARM1);

	    RETVAL = sim_io_stat (simulator, path, &host_stat);

	    free (path);
	    buf = PARM2;

	    /* Just wild-assed guesses.  */
	    store_mem (buf, 2, host_stat.st_dev);
	    store_mem (buf + 2, 2, host_stat.st_ino);
	    store_mem (buf + 4, 4, host_stat.st_mode);
	    store_mem (buf + 8, 2, host_stat.st_nlink);
	    store_mem (buf + 10, 2, host_stat.st_uid);
	    store_mem (buf + 12, 2, host_stat.st_gid);
	    store_mem (buf + 14, 2, host_stat.st_rdev);
	    store_mem (buf + 16, 4, host_stat.st_size);
	    store_mem (buf + 20, 4, host_stat.st_atime);
	    store_mem (buf + 28, 4, host_stat.st_mtime);
	    store_mem (buf + 36, 4, host_stat.st_ctime);

	    if ((int) RETVAL < 0)
	      RETERR = sim_io_get_errno (simulator);
	  }
	  break;
#endif

#ifdef TARGET_SYS_fstat
	case TARGET_SYS_fstat:
	  /* fstat system call */
	  {
	    struct stat host_stat;
	    reg_t buf;

	    RETVAL = sim_io_fstat (simulator, PARM1, &host_stat);

	    buf = PARM2;

	    /* Just wild-assed guesses.  */
	    store_mem (buf, 2, host_stat.st_dev);
	    store_mem (buf + 2, 2, host_stat.st_ino);
	    store_mem (buf + 4, 4, host_stat.st_mode);
	    store_mem (buf + 8, 2, host_stat.st_nlink);
	    store_mem (buf + 10, 2, host_stat.st_uid);
	    store_mem (buf + 12, 2, host_stat.st_gid);
	    store_mem (buf + 14, 2, host_stat.st_rdev);
	    store_mem (buf + 16, 4, host_stat.st_size);
	    store_mem (buf + 20, 4, host_stat.st_atime);
	    store_mem (buf + 28, 4, host_stat.st_mtime);
	    store_mem (buf + 36, 4, host_stat.st_ctime);

	    if ((int) RETVAL < 0)
	      RETERR = sim_io_get_errno (simulator);
	  }
	  break;
#endif

#ifdef TARGET_SYS_rename
	case TARGET_SYS_rename:
	  {
	    char *oldpath = fetch_str (simulator, PARM1);
	    char *newpath = fetch_str (simulator, PARM2);
	    RETVAL = sim_io_rename (simulator, oldpath, newpath);
	    free (oldpath);
	    free (newpath);
	    if ((int) RETVAL < 0)
	      RETERR = sim_io_get_errno (simulator);
	  }
	  break;
#endif

#ifdef TARGET_SYS_unlink
	case TARGET_SYS_unlink:
	  {
	    char *path = fetch_str (simulator, PARM1);
	    RETVAL = sim_io_unlink (simulator, path);
	    free (path);
	    if ((int) RETVAL < 0)
	      RETERR = sim_io_get_errno (simulator);
	  }
	  break;
#endif

#ifdef HAVE_CHOWN
#ifdef TARGET_SYS_chown
	case TARGET_SYS_chown:
	  {
	    char *path = fetch_str (simulator, PARM1);
	    RETVAL = chown (path, PARM2, PARM3);
	    free (path);
	    RETERR = errno;
	  }
	  break;
#endif
#endif

#if HAVE_CHMOD
#ifdef TARGET_SYS_chmod
	case TARGET_SYS_chmod:
	  {
	    char *path = fetch_str (simulator, PARM1);
	    RETVAL = chmod (path, PARM2);
	    free (path);
	    RETERR = errno;
	  }
	  break;
#endif
#endif

#ifdef TARGET_SYS_time
#if HAVE_TIME
	case TARGET_SYS_time:
	  {
	    time_t now;
	    RETVAL = time (&now);
	    store_mem (PARM1, 4, now);
	    RETERR = errno;
	  }
	  break;
#endif
#endif

#if !defined(__GO32__) && !defined(_WIN32)
#ifdef TARGET_SYS_times
	case TARGET_SYS_times:
	  {
	    struct tms tms;
	    RETVAL = times (&tms);
	    store_mem (PARM1, 4, tms.tms_utime);
	    store_mem (PARM1 + 4, 4, tms.tms_stime);
	    store_mem (PARM1 + 8, 4, tms.tms_cutime);
	    store_mem (PARM1 + 12, 4, tms.tms_cstime);
	    reterr = errno;
	    break;
	  }
#endif
#endif

#ifdef TARGET_SYS_gettimeofday
#if !defined(__GO32__) && !defined(_WIN32)
	case TARGET_SYS_gettimeofday:
	  {
	    struct timeval t;
	    struct timezone tz;
	    RETVAL = gettimeofday (&t, &tz);
	    store_mem (PARM1, 4, t.tv_sec);
	    store_mem (PARM1 + 4, 4, t.tv_usec);
	    store_mem (PARM2, 4, tz.tz_minuteswest);
	    store_mem (PARM2 + 4, 4, tz.tz_dsttime);
	    RETERR = errno;
	    break;
	  }
#endif
#endif

#ifdef TARGET_SYS_utime
#if HAVE_UTIME
	case TARGET_SYS_utime:
	  {
	    /* Cast the second argument to void *, to avoid type mismatch
	       if a prototype is present.  */
	    sim_io_error (simulator, "Utime not supported");
	    /* RETVAL = utime (path, (void *) MEMPTR (PARM2)); */
	  }
	  break;
#endif
#endif

	default:
	  abort ();
	}
      errno = save_errno;

      return 4;
    }
  else
    {				/* Trap 0 -> 30 */
      EIPC = PC + 4;
      EIPSW = PSW;
      /* Mask out EICC */
      ECR &= 0xffff0000;
      ECR |= 0x40 + OP[0];
      /* Flag that we are now doing exception processing.  */
      PSW |= PSW_EP | PSW_ID;
      PC = (OP[0] < 0x10) ? 0x40 : 0x50;

      return 0;
    }
}

/* tst1 reg2, [reg1] */
int
OP_E607E0 (void)
{
  int temp;

  trace_input ("tst1", OP_BIT, 1);

  temp = load_mem (State.regs[ OP[0] ], 1);

  PSW &= ~PSW_Z;
  if ((temp & (1 << (State.regs[ OP[1] ] & 0x7))) == 0)
    PSW |= PSW_Z;

  trace_output (OP_BIT);

  return 4;
}

/* mulu reg1, reg2, reg3 */
int
OP_22207E0 (void)
{
  trace_input ("mulu", OP_REG_REG_REG, 0);

  Multiply64 (0, State.regs[ OP[0] ]);

  trace_output (OP_REG_REG_REG);

  return 4;
}

#define BIT_CHANGE_OP( name, binop )		\
  unsigned int bit;				\
  unsigned int temp;				\
  						\
  trace_input (name, OP_BIT_CHANGE, 0);		\
  						\
  bit  = 1 << (State.regs[ OP[1] ] & 0x7);	\
  temp = load_mem (State.regs[ OP[0] ], 1);	\
						\
  PSW &= ~PSW_Z;				\
  if ((temp & bit) == 0)			\
    PSW |= PSW_Z;				\
  temp binop bit;				\
  						\
  store_mem (State.regs[ OP[0] ], 1, temp);	\
	     					\
  trace_output (OP_BIT_CHANGE);			\
	     					\
  return 4;

/* clr1 reg2, [reg1] */
int
OP_E407E0 (void)
{
  BIT_CHANGE_OP ("clr1", &= ~ );
}

/* not1 reg2, [reg1] */
int
OP_E207E0 (void)
{
  BIT_CHANGE_OP ("not1", ^= );
}

/* set1 */
int
OP_E007E0 (void)
{
  BIT_CHANGE_OP ("set1", |= );
}

/* sasf */
int
OP_20007E0 (void)
{
  trace_input ("sasf", OP_EX1, 0);

  State.regs[ OP[1] ] = (State.regs[ OP[1] ] << 1) | condition_met (OP[0]);

  trace_output (OP_EX1);

  return 4;
}

/* This function is courtesy of Sugimoto at NEC, via Seow Tan
   (Soew_Tan@el.nec.com) */
void
divun
(
  unsigned int       N,
  unsigned long int  als,
  unsigned long int  sfi,
  unsigned32 /*unsigned long int*/ *  quotient_ptr,
  unsigned32 /*unsigned long int*/ *  remainder_ptr,
  int *          overflow_ptr
)
{
  unsigned long   ald = sfi >> (N - 1);
  unsigned long   alo = als;
  unsigned int    Q   = 1;
  unsigned int    C;
  unsigned int    S   = 0;
  unsigned int    i;
  unsigned int    R1  = 1;
  unsigned int    DBZ = (als == 0) ? 1 : 0;
  unsigned long   alt = Q ? ~als : als;

  /* 1st Loop */
  alo = ald + alt + Q;
  C   = (((alt >> 31) & (ald >> 31))
	 | (((alt >> 31) ^ (ald >> 31)) & (~alo >> 31)));
  C   = C ^ Q;
  Q   = ~(C ^ S) & 1;
  R1  = (alo == 0) ? 0 : (R1 & Q);
  if ((S ^ (alo>>31)) && !C)
    {
      DBZ = 1;
    }
  S   = alo >> 31;
  sfi = (sfi << (32-N+1)) | Q;
  ald = (alo << 1) | (sfi >> 31);

  /* 2nd - N-1th Loop */
  for (i = 2; i < N; i++)
    {
      alt = Q ? ~als : als;
      alo = ald + alt + Q;
      C   = (((alt >> 31) & (ald >> 31))
	     | (((alt >> 31) ^ (ald >> 31)) & (~alo >> 31)));
      C   = C ^ Q;
      Q   = ~(C ^ S) & 1;
      R1  = (alo == 0) ? 0 : (R1 & Q);
      if ((S ^ (alo>>31)) && !C && !DBZ)
	{
	  DBZ = 1;
	}
      S   = alo >> 31;
      sfi = (sfi << 1) | Q;
      ald = (alo << 1) | (sfi >> 31);
    }

  /* Nth Loop */
  alt = Q ? ~als : als;
  alo = ald + alt + Q;
  C   = (((alt >> 31) & (ald >> 31))
	 | (((alt >> 31) ^ (ald >> 31)) & (~alo >> 31)));
  C   = C ^ Q;
  Q   = ~(C ^ S) & 1;
  R1  = (alo == 0) ? 0 : (R1 & Q);
  if ((S ^ (alo>>31)) && !C)
    {
      DBZ = 1;
    }

  * quotient_ptr  = (sfi << 1) | Q;
  * remainder_ptr = Q ? alo : (alo + als);
  * overflow_ptr  = DBZ | R1;
}

/* This function is courtesy of Sugimoto at NEC, via Seow Tan (Soew_Tan@el.nec.com) */
void
divn
(
  unsigned int       N,
  unsigned long int  als,
  unsigned long int  sfi,
  signed32 /*signed long int*/ *  quotient_ptr,
  signed32 /*signed long int*/ *  remainder_ptr,
  int *          overflow_ptr
)
{
  unsigned long	  ald = (signed long) sfi >> (N - 1);
  unsigned long   alo = als;
  unsigned int    SS  = als >> 31;
  unsigned int	  SD  = sfi >> 31;
  unsigned int    R1  = 1;
  unsigned int    OV;
  unsigned int    DBZ = als == 0 ? 1 : 0;
  unsigned int    Q   = ~(SS ^ SD) & 1;
  unsigned int    C;
  unsigned int    S;
  unsigned int    i;
  unsigned long   alt = Q ? ~als : als;


  /* 1st Loop */

  alo = ald + alt + Q;
  C   = (((alt >> 31) & (ald >> 31))
	 | (((alt >> 31) ^ (ald >> 31)) & (~alo >> 31)));
  Q   = C ^ SS;
  R1  = (alo == 0) ? 0 : (R1 & (Q ^ (SS ^ SD)));
  S   = alo >> 31;
  sfi = (sfi << (32-N+1)) | Q;
  ald = (alo << 1) | (sfi >> 31);
  if ((alo >> 31) ^ (ald >> 31))
    {
      DBZ = 1;
    }

  /* 2nd - N-1th Loop */

  for (i = 2; i < N; i++)
    {
      alt = Q ? ~als : als;
      alo = ald + alt + Q;
      C   = (((alt >> 31) & (ald >> 31))
	     | (((alt >> 31) ^ (ald >> 31)) & (~alo >> 31)));
      Q   = C ^ SS;
      R1  = (alo == 0) ? 0 : (R1 & (Q ^ (SS ^ SD)));
      S   = alo >> 31;
      sfi = (sfi << 1) | Q;
      ald = (alo << 1) | (sfi >> 31);
      if ((alo >> 31) ^ (ald >> 31))
	{
	  DBZ = 1;
	}
    }

  /* Nth Loop */
  alt = Q ? ~als : als;
  alo = ald + alt + Q;
  C   = (((alt >> 31) & (ald >> 31))
	 | (((alt >> 31) ^ (ald >> 31)) & (~alo >> 31)));
  Q   = C ^ SS;
  R1  = (alo == 0) ? 0 : (R1 & (Q ^ (SS ^ SD)));
  sfi = (sfi << (32-N+1));
  ald = alo;

  /* End */
  if (alo != 0)
    {
      alt = Q ? ~als : als;
      alo = ald + alt + Q;
    }
  R1  = R1 & ((~alo >> 31) ^ SD);
  if ((alo != 0) && ((Q ^ (SS ^ SD)) ^ R1)) alo = ald;
  if (N != 32)
    ald = sfi = (long) ((sfi >> 1) | (SS ^ SD) << 31) >> (32-N-1) | Q;
  else
    ald = sfi = sfi | Q;

  OV = DBZ | ((alo == 0) ? 0 : R1);

  * remainder_ptr = alo;

  /* Adj */
  if (((alo != 0) && ((SS ^ SD) ^ R1))
      || ((alo == 0) && (SS ^ R1)))
    alo = ald + 1;
  else
    alo = ald;

  OV  = (DBZ | R1) ? OV : ((alo >> 31) & (~ald >> 31));

  * quotient_ptr  = alo;
  * overflow_ptr  = OV;
}

/* sdivun imm5, reg1, reg2, reg3 */
int
OP_1C207E0 (void)
{
  unsigned32 /*unsigned long int*/  quotient;
  unsigned32 /*unsigned long int*/  remainder;
  unsigned long int  divide_by;
  unsigned long int  divide_this;
  int            overflow = 0;
  unsigned int       imm5;

  trace_input ("sdivun", OP_IMM_REG_REG_REG, 0);

  imm5 = 32 - ((OP[3] & 0x3c0000) >> 17);

  divide_by   = State.regs[ OP[0] ];
  divide_this = State.regs[ OP[1] ] << imm5;

  divun (imm5, divide_by, divide_this, & quotient, & remainder, & overflow);

  State.regs[ OP[1]       ] = quotient;
  State.regs[ OP[2] >> 11 ] = remainder;

  /* Set condition codes.  */
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);

  if (overflow)      PSW |= PSW_OV;
  if (quotient == 0) PSW |= PSW_Z;
  if (quotient & 0x80000000) PSW |= PSW_S;

  trace_output (OP_IMM_REG_REG_REG);

  return 4;
}

/* sdivn imm5, reg1, reg2, reg3 */
int
OP_1C007E0 (void)
{
  signed32 /*signed long int*/  quotient;
  signed32 /*signed long int*/  remainder;
  signed long int  divide_by;
  signed long int  divide_this;
  int          overflow = 0;
  unsigned int     imm5;

  trace_input ("sdivn", OP_IMM_REG_REG_REG, 0);

  imm5 = 32 - ((OP[3] & 0x3c0000) >> 17);

  divide_by   = (signed32) State.regs[ OP[0] ];
  divide_this = (signed32) (State.regs[ OP[1] ] << imm5);

  divn (imm5, divide_by, divide_this, & quotient, & remainder, & overflow);

  State.regs[ OP[1]       ] = quotient;
  State.regs[ OP[2] >> 11 ] = remainder;

  /* Set condition codes.  */
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);

  if (overflow)      PSW |= PSW_OV;
  if (quotient == 0) PSW |= PSW_Z;
  if (quotient <  0) PSW |= PSW_S;

  trace_output (OP_IMM_REG_REG_REG);

  return 4;
}

/* sdivhun imm5, reg1, reg2, reg3 */
int
OP_18207E0 (void)
{
  unsigned32 /*unsigned long int*/  quotient;
  unsigned32 /*unsigned long int*/  remainder;
  unsigned long int  divide_by;
  unsigned long int  divide_this;
  int            overflow = 0;
  unsigned int       imm5;

  trace_input ("sdivhun", OP_IMM_REG_REG_REG, 0);

  imm5 = 32 - ((OP[3] & 0x3c0000) >> 17);

  divide_by   = State.regs[ OP[0] ] & 0xffff;
  divide_this = State.regs[ OP[1] ] << imm5;

  divun (imm5, divide_by, divide_this, & quotient, & remainder, & overflow);

  State.regs[ OP[1]       ] = quotient;
  State.regs[ OP[2] >> 11 ] = remainder;

  /* Set condition codes.  */
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);

  if (overflow)      PSW |= PSW_OV;
  if (quotient == 0) PSW |= PSW_Z;
  if (quotient & 0x80000000) PSW |= PSW_S;

  trace_output (OP_IMM_REG_REG_REG);

  return 4;
}

/* sdivhn imm5, reg1, reg2, reg3 */
int
OP_18007E0 (void)
{
  signed32 /*signed long int*/  quotient;
  signed32 /*signed long int*/  remainder;
  signed long int  divide_by;
  signed long int  divide_this;
  int          overflow = 0;
  unsigned int     imm5;

  trace_input ("sdivhn", OP_IMM_REG_REG_REG, 0);

  imm5 = 32 - ((OP[3] & 0x3c0000) >> 17);

  divide_by   = EXTEND16 (State.regs[ OP[0] ]);
  divide_this = (signed32) (State.regs[ OP[1] ] << imm5);

  divn (imm5, divide_by, divide_this, & quotient, & remainder, & overflow);

  State.regs[ OP[1]       ] = quotient;
  State.regs[ OP[2] >> 11 ] = remainder;

  /* Set condition codes.  */
  PSW &= ~(PSW_Z | PSW_S | PSW_OV);

  if (overflow)      PSW |= PSW_OV;
  if (quotient == 0) PSW |= PSW_Z;
  if (quotient <  0) PSW |= PSW_S;

  trace_output (OP_IMM_REG_REG_REG);

  return 4;
}

/* divu  reg1, reg2, reg3 */
int
OP_2C207E0 (void)
{
  unsigned long int quotient;
  unsigned long int remainder;
  unsigned long int divide_by;
  unsigned long int divide_this;
  int           overflow = 0;

  trace_input ("divu", OP_REG_REG_REG, 0);

  /* Compute the result.  */

  divide_by   = State.regs[ OP[0] ];
  divide_this = State.regs[ OP[1] ];

  if (divide_by == 0)
    {
      PSW |= PSW_OV;
    }
  else
    {
      State.regs[ OP[1]       ] = quotient  = divide_this / divide_by;
      State.regs[ OP[2] >> 11 ] = remainder = divide_this % divide_by;

      /* Set condition codes.  */
      PSW &= ~(PSW_Z | PSW_S | PSW_OV);

      if (overflow)      PSW |= PSW_OV;
      if (quotient == 0) PSW |= PSW_Z;
      if (quotient & 0x80000000) PSW |= PSW_S;
    }

  trace_output (OP_REG_REG_REG);

  return 4;
}

/* div  reg1, reg2, reg3 */
int
OP_2C007E0 (void)
{
  signed long int quotient;
  signed long int remainder;
  signed long int divide_by;
  signed long int divide_this;

  trace_input ("div", OP_REG_REG_REG, 0);

  /* Compute the result.  */

  divide_by   = (signed32) State.regs[ OP[0] ];
  divide_this = State.regs[ OP[1] ];

  if (divide_by == 0)
    {
      PSW |= PSW_OV;
    }
  else if (divide_by == -1 && divide_this == (1L << 31))
    {
      PSW &= ~PSW_Z;
      PSW |= PSW_OV | PSW_S;
      State.regs[ OP[1] ] = (1 << 31);
      State.regs[ OP[2] >> 11 ] = 0;
    }
  else
    {
      divide_this = (signed32) divide_this;
      State.regs[ OP[1]       ] = quotient  = divide_this / divide_by;
      State.regs[ OP[2] >> 11 ] = remainder = divide_this % divide_by;

      /* Set condition codes.  */
      PSW &= ~(PSW_Z | PSW_S | PSW_OV);

      if (quotient == 0) PSW |= PSW_Z;
      if (quotient <  0) PSW |= PSW_S;
    }

  trace_output (OP_REG_REG_REG);

  return 4;
}

/* divhu  reg1, reg2, reg3 */
int
OP_28207E0 (void)
{
  unsigned long int quotient;
  unsigned long int remainder;
  unsigned long int divide_by;
  unsigned long int divide_this;
  int           overflow = 0;

  trace_input ("divhu", OP_REG_REG_REG, 0);

  /* Compute the result.  */

  divide_by   = State.regs[ OP[0] ] & 0xffff;
  divide_this = State.regs[ OP[1] ];

  if (divide_by == 0)
    {
      PSW |= PSW_OV;
    }
  else
    {
      State.regs[ OP[1]       ] = quotient  = divide_this / divide_by;
      State.regs[ OP[2] >> 11 ] = remainder = divide_this % divide_by;

      /* Set condition codes.  */
      PSW &= ~(PSW_Z | PSW_S | PSW_OV);

      if (overflow)      PSW |= PSW_OV;
      if (quotient == 0) PSW |= PSW_Z;
      if (quotient & 0x80000000) PSW |= PSW_S;
    }

  trace_output (OP_REG_REG_REG);

  return 4;
}

/* divh  reg1, reg2, reg3 */
int
OP_28007E0 (void)
{
  signed long int quotient;
  signed long int remainder;
  signed long int divide_by;
  signed long int divide_this;
  int         overflow = 0;

  trace_input ("divh", OP_REG_REG_REG, 0);

  /* Compute the result.  */

  divide_by  = EXTEND16 (State.regs[ OP[0] ]);
  divide_this = State.regs[ OP[1] ];

  if (divide_by == 0)
    {
      PSW |= PSW_OV;
    }
  else if (divide_by == -1 && divide_this == (1L << 31))
    {
      PSW &= ~PSW_Z;
      PSW |= PSW_OV | PSW_S;
      State.regs[ OP[1] ] = (1 << 31);
      State.regs[ OP[2] >> 11 ] = 0;
    }
  else
    {
      divide_this = (signed32) divide_this;
      State.regs[ OP[1]       ] = quotient  = divide_this / divide_by;
      State.regs[ OP[2] >> 11 ] = remainder = divide_this % divide_by;

      /* Set condition codes.  */
      PSW &= ~(PSW_Z | PSW_S | PSW_OV);

      if (quotient == 0) PSW |= PSW_Z;
      if (quotient <  0) PSW |= PSW_S;
    }

  trace_output (OP_REG_REG_REG);

  return 4;
}

/* mulu imm9, reg2, reg3 */
int
OP_24207E0 (void)
{
  trace_input ("mulu", OP_IMM_REG_REG, 0);

  Multiply64 (0, (OP[3] & 0x1f) | ((OP[3] >> 13) & 0x1e0));

  trace_output (OP_IMM_REG_REG);

  return 4;
}

/* mul imm9, reg2, reg3 */
int
OP_24007E0 (void)
{
  trace_input ("mul", OP_IMM_REG_REG, 0);

  Multiply64 (1, SEXT9 ((OP[3] & 0x1f) | ((OP[3] >> 13) & 0x1e0)));

  trace_output (OP_IMM_REG_REG);

  return 4;
}

/* ld.hu */
int
OP_107E0 (void)
{
  int adr;

  trace_input ("ld.hu", OP_LOAD32, 2);

  adr = State.regs[ OP[0] ] + EXTEND16 (OP[2] & ~1);
  adr &= ~0x1;

  State.regs[ OP[1] ] = load_mem (adr, 2);

  trace_output (OP_LOAD32);

  return 4;
}


/* ld.bu */
int
OP_10780 (void)
{
  int adr;

  trace_input ("ld.bu", OP_LOAD32, 1);

  adr = (State.regs[ OP[0] ]
	 + (EXTEND16 (OP[2] & ~1) | ((OP[3] >> 5) & 1)));

  State.regs[ OP[1] ] = load_mem (adr, 1);

  trace_output (OP_LOAD32);

  return 4;
}

/* prepare list12, imm5, imm32 */
int
OP_1B0780 (void)
{
  int  i;

  trace_input ("prepare", OP_PUSHPOP1, 0);

  /* Store the registers with lower number registers being placed at higher addresses.  */
  for (i = 0; i < 12; i++)
    if ((OP[3] & (1 << type1_regs[ i ])))
      {
	SP -= 4;
	store_mem (SP, 4, State.regs[ 20 + i ]);
      }

  SP -= (OP[3] & 0x3e) << 1;

  EP = load_mem (PC + 4, 4);

  trace_output (OP_PUSHPOP1);

  return 8;
}

/* prepare list12, imm5, imm16-32 */
int
OP_130780 (void)
{
  int  i;

  trace_input ("prepare", OP_PUSHPOP1, 0);

  /* Store the registers with lower number registers being placed at higher addresses.  */
  for (i = 0; i < 12; i++)
    if ((OP[3] & (1 << type1_regs[ i ])))
      {
	SP -= 4;
	store_mem (SP, 4, State.regs[ 20 + i ]);
      }

  SP -= (OP[3] & 0x3e) << 1;

  EP = load_mem (PC + 4, 2) << 16;

  trace_output (OP_PUSHPOP1);

  return 6;
}

/* prepare list12, imm5, imm16 */
int
OP_B0780 (void)
{
  int  i;

  trace_input ("prepare", OP_PUSHPOP1, 0);

  /* Store the registers with lower number registers being placed at higher addresses.  */
  for (i = 0; i < 12; i++)
    if ((OP[3] & (1 << type1_regs[ i ])))
      {
	SP -= 4;
	store_mem (SP, 4, State.regs[ 20 + i ]);
      }

  SP -= (OP[3] & 0x3e) << 1;

  EP = EXTEND16 (load_mem (PC + 4, 2));

  trace_output (OP_PUSHPOP1);

  return 6;
}

/* prepare list12, imm5, sp */
int
OP_30780 (void)
{
  int  i;

  trace_input ("prepare", OP_PUSHPOP1, 0);

  /* Store the registers with lower number registers being placed at higher addresses.  */
  for (i = 0; i < 12; i++)
    if ((OP[3] & (1 << type1_regs[ i ])))
      {
	SP -= 4;
	store_mem (SP, 4, State.regs[ 20 + i ]);
      }

  SP -= (OP[3] & 0x3e) << 1;

  EP = SP;

  trace_output (OP_PUSHPOP1);

  return 4;
}

/* mul reg1, reg2, reg3 */
int
OP_22007E0 (void)
{
  trace_input ("mul", OP_REG_REG_REG, 0);

  Multiply64 (1, State.regs[ OP[0] ]);

  trace_output (OP_REG_REG_REG);

  return 4;
}

/* popmh list18 */
int
OP_307F0 (void)
{
  int i;

  trace_input ("popmh", OP_PUSHPOP2, 0);

  if (OP[3] & (1 << 19))
    {
      if ((PSW & PSW_NP) && ((PSW & PSW_EP) == 0))
	{
	  FEPSW = load_mem ( SP      & ~ 3, 4);
	  FEPC  = load_mem ((SP + 4) & ~ 3, 4);
	}
      else
	{
	  EIPSW = load_mem ( SP      & ~ 3, 4);
	  EIPC  = load_mem ((SP + 4) & ~ 3, 4);
	}

      SP += 8;
    }

  /* Load the registers with lower number registers being retrieved from higher addresses.  */
  for (i = 16; i--;)
    if ((OP[3] & (1 << type2_regs[ i ])))
      {
	State.regs[ i + 16 ] = load_mem (SP & ~ 3, 4);
	SP += 4;
      }

  trace_output (OP_PUSHPOP2);

  return 4;
}

/* popml lsit18 */
int
OP_107F0 (void)
{
  int i;

  trace_input ("popml", OP_PUSHPOP3, 0);

  if (OP[3] & (1 << 19))
    {
      if ((PSW & PSW_NP) && ((PSW & PSW_EP) == 0))
	{
	  FEPSW = load_mem ( SP      & ~ 3, 4);
	  FEPC =  load_mem ((SP + 4) & ~ 3, 4);
	}
      else
	{
	  EIPSW = load_mem ( SP      & ~ 3, 4);
	  EIPC  = load_mem ((SP + 4) & ~ 3, 4);
	}

      SP += 8;
    }

  if (OP[3] & (1 << 3))
    {
      PSW = load_mem (SP & ~ 3, 4);
      SP += 4;
    }

  /* Load the registers with lower number registers being retrieved from higher addresses.  */
  for (i = 15; i--;)
    if ((OP[3] & (1 << type3_regs[ i ])))
      {
	State.regs[ i + 1 ] = load_mem (SP & ~ 3, 4);
	SP += 4;
      }

  trace_output (OP_PUSHPOP2);

  return 4;
}

/* pushmh list18 */
int
OP_307E0 (void)
{
  int i;

  trace_input ("pushmh", OP_PUSHPOP2, 0);

  /* Store the registers with lower number registers being placed at higher addresses.  */
  for (i = 0; i < 16; i++)
    if ((OP[3] & (1 << type2_regs[ i ])))
      {
	SP -= 4;
	store_mem (SP & ~ 3, 4, State.regs[ i + 16 ]);
      }

  if (OP[3] & (1 << 19))
    {
      SP -= 8;

      if ((PSW & PSW_NP) && ((PSW & PSW_EP) == 0))
	{
	  store_mem ((SP + 4) & ~ 3, 4, FEPC);
	  store_mem ( SP      & ~ 3, 4, FEPSW);
	}
      else
	{
	  store_mem ((SP + 4) & ~ 3, 4, EIPC);
	  store_mem ( SP      & ~ 3, 4, EIPSW);
	}
    }

  trace_output (OP_PUSHPOP2);

  return 4;
}