misc.c   [plain text]

/* TIc80 Simulator.
   Copyright (C) 1997, 1998 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 2, 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, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */


#include "sim-main.h"

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


tic80_control_regs
tic80_index2cr (int index)
{
  switch (index)
    {
    case 0x0000: return EPC_CR;
    case 0x0001: return EIP_CR;
    case 0x0002: return CONFIG_CR;
    case 0x0004: return INTPEN_CR;
    case 0x0006: return IE_CR;
    case 0x0008: return FPST_CR;
    case 0x000A: return PPERROR_CR;
    case 0x000D: return PKTREQ_CR;
    case 0x000E: return TCOUNT_CR;
    case 0x000F: return TSCALE_CR;
    case 0x0010: return FLTOP_CR;
    case 0x0011: return FLTADR_CR;
    case 0x0012: return FLTTAG_CR;
    case 0x0013: return FLTDLT_CR;
    case 0x0014: return FLTDTH_CR;
    case 0x0015: return FLT005_CR;
    case 0x0016: return FLT006_CR;
    case 0x0017: return FLT007_CR;
    case 0x0018: return FLT008_CR;
    case 0x0019: return FLT009_CR;
    case 0x001a: return FLT010_CR;
    case 0x001b: return FLT011_CR;
    case 0x001c: return FLT012_CR;
    case 0x001d: return FLT013_CR;
    case 0x001e: return FLT014_CR;
    case 0x001f: return FLT015_CR;
    case 0x0020: return SYSSTK_CR;
    case 0x0021: return SYSTMP_CR;
    case 0x0030: return MPC_CR;
    case 0x0031: return MIP_CR;
    case 0x0033: return ECOMCNTL_CR;
    case 0x0034: return ANASTAT_CR;
    case 0x0039: return BRK1_CR;
    case 0x003A: return BRK2_CR;
    case 0x0200: return ITAG0_CR;
    case 0x0201: return ITAG1_CR;
    case 0x0202: return ITAG2_CR;
    case 0x0203: return ITAG3_CR;
    case 0x0204: return ITAG4_CR;
    case 0x0205: return ITAG5_CR;
    case 0x0206: return ITAG6_CR;
    case 0x0207: return ITAG7_CR;
    case 0x0208: return ITAG8_CR;
    case 0x0209: return ITAG9_CR;
    case 0x020a: return ITAG10_CR;
    case 0x020b: return ITAG11_CR;
    case 0x020c: return ITAG12_CR;
    case 0x020d: return ITAG13_CR;
    case 0x020e: return ITAG14_CR;
    case 0x020f: return ITAG15_CR;
    case 0x0300: return ILRU_CR;
    case 0x0400: return DTAG0_CR;
    case 0x0401: return DTAG1_CR;
    case 0x0402: return DTAG2_CR;
    case 0x0403: return DTAG3_CR;
    case 0x0404: return DTAG4_CR;
    case 0x0405: return DTAG5_CR;
    case 0x0406: return DTAG6_CR;
    case 0x0407: return DTAG7_CR;
    case 0x0408: return DTAG8_CR;
    case 0x0409: return DTAG9_CR;
    case 0x040a: return DTAG10_CR;
    case 0x040b: return DTAG11_CR;
    case 0x040c: return DTAG12_CR;
    case 0x040d: return DTAG13_CR;
    case 0x040e: return DTAG14_CR;
    case 0x040f: return DTAG15_CR;
    case 0x0500: return DLRU_CR;
    case 0x4000: return IN0P_CR;
    case 0x4001: return IN1P_CR;
    case 0x4002: return OUTP_CR;
    default: return SCRATCH_CR;
    }
}



#if defined(WITH_TRACE)
/* Tracing support routines */

static char tic80_trace_buffer[1024];
static int  tic80_size_name;

#define SIZE_HEX	8
#define SIZE_DECIMAL	11

/* Initialize tracing by calculating the maximum name size */
static void
tic80_init_trace (void)
{
  int i;
  int len, max_len = 0;

  for (i = 0; i < (int)nr_itable_entries; i++) {
    len = strlen (itable[i].name);
    if (len > max_len)
      max_len = len;
  }

  tic80_size_name = max_len + sizeof(":m") - 1 + sizeof (":s") - 1;
}

/* Given an integer which is the result of a comparison, return a string
   giving which bits are set.  */

static char *
tic80_trace_cmp_internal (unsigned32 flag)
{
  struct cmp_bits { unsigned32 bit; char *string; };
  static char buffer[32*8];
  static struct cmp_bits bits[] =
  {
    { BIT32(29), "hs" },
    { BIT32(28), "lo" },
    { BIT32(27), "ls" },
    { BIT32(26), "hi" },
    { BIT32(25), "ge" },
    { BIT32(24), "lt" },
    { BIT32(23), "le" },
    { BIT32(22), "gt" },
    { BIT32(21), "ne" },
    { BIT32(20), "eq" },

    { BIT32(19), "hs.h" },
    { BIT32(18), "lo.h" },
    { BIT32(17), "ls.h" },
    { BIT32(16), "hi.h" },
    { BIT32(15), "ge.h" },
    { BIT32(14), "lt.h" },
    { BIT32(13), "le.h" },
    { BIT32(12), "gt.h" },
    { BIT32(11), "ne.h" },
    { BIT32(10), "eq.h" },

    { BIT32( 9), "hs.b" },
    { BIT32( 8), "lo.b" },
    { BIT32( 7), "ls.b" },
    { BIT32( 6), "hi.b" },
    { BIT32( 5), "ge.b" },
    { BIT32( 4), "lt.b" },
    { BIT32( 3), "le.b" },
    { BIT32( 2), "gt.b" },
    { BIT32( 1), "ne.b" },
    { BIT32( 0), "eq.b" },
    { 0,	 (char *)0 },
  };

  int i;
  char *p = buffer;

  for (i = 0; bits[i].bit != 0; i++)
    {
      if ((flag & bits[i].bit) != 0)
	{
	  if (p != buffer)
	    *p++ = ' ';

	  strcpy (p, bits[i].string);
	  p += strlen (p);
	}
    }

  *p = '\0';
  return buffer;
}

/* Trace the result of an ALU operation with 2 integer inputs and an integer output */
char *
tic80_trace_alu3 (int indx,
		  unsigned32 result,
		  unsigned32 input1,
		  unsigned32 input2)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  sprintf (tic80_trace_buffer, "%-*s 0x%.*lx/%*ld 0x%.*lx/%*ld => 0x%.*lx/%*ld",
	   tic80_size_name, itable[indx].name,
	   SIZE_HEX, input1, SIZE_DECIMAL, (long)(signed32)input1,
	   SIZE_HEX, input2, SIZE_DECIMAL, (long)(signed32)input2,
	   SIZE_HEX, result, SIZE_DECIMAL, (long)(signed32)result);

  return tic80_trace_buffer;
}

/* Trace the result of an ALU operation with 2 integer inputs and an integer output
   that sets the bits from a compare instruction.  */
char *
tic80_trace_cmp (int indx,
		 unsigned32 result,
		 unsigned32 input1,
		 unsigned32 input2)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  sprintf (tic80_trace_buffer, "%-*s 0x%.*lx/%*ld 0x%.*lx/%*ld => 0x%.*lx %s",
	   tic80_size_name, itable[indx].name,
	   SIZE_HEX, input1, SIZE_DECIMAL, (long)(signed32)input1,
	   SIZE_HEX, input2, SIZE_DECIMAL, (long)(signed32)input2,
	   SIZE_HEX, result, tic80_trace_cmp_internal (result));

  return tic80_trace_buffer;
}

/* Trace the result of an ALU operation with 1 integer input and an integer output */
char *
tic80_trace_alu2 (int indx,
		  unsigned32 result,
		  unsigned32 input)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  sprintf (tic80_trace_buffer, "%-*s 0x%.*lx/%*ld %*s => 0x%.*lx/%*ld",
	   tic80_size_name, itable[indx].name,
	   SIZE_HEX, input, SIZE_DECIMAL, (long)(signed32)input,
	   SIZE_HEX + SIZE_DECIMAL + 3, "",
	   SIZE_HEX, result, SIZE_DECIMAL, (long)(signed32)result);

  return tic80_trace_buffer;
}

/* Trace the result of a shift instruction */
char *
tic80_trace_shift (int indx,
		   unsigned32 result,
		   unsigned32 input,
		   int i,
		   int n,
		   int merge,
		   int endmask,
		   int rotate)
{
  const char *merge_name;
  char name[40];
  char *p;

  if (!tic80_size_name)
    tic80_init_trace ();

  switch (merge)
    {
    default:	merge_name = ".??"; break;
    case 0:	merge_name = ".dz"; break;
    case 1:	merge_name = ".dm"; break;
    case 2:	merge_name = ".ds"; break;
    case 3:	merge_name = ".ez"; break;
    case 4:	merge_name = ".em"; break;
    case 5:	merge_name = ".es"; break;
    case 6:	merge_name = ".iz"; break;
    case 7:	merge_name = ".im"; break;
    }

  /* Don't use itable[indx].name, which is just sl {r,i}.  Instead reconstruct
     the name, using the i and n fields.  */
  p = strchr (itable[indx].name, ' ');
  sprintf (name, "s%s%s%s%s",
	   (n) ? "r" : "l",
	   (i) ? "i" : "",
	   merge_name,
	   (p) ? p : "");

  sprintf (tic80_trace_buffer, "%-*s 0x%.*lx/%*ld %*s%2d,%2d => 0x%.*lx/%*ld",
	   tic80_size_name, name,
	   SIZE_HEX, input, SIZE_DECIMAL, (long)(signed32)input,
	   SIZE_HEX + SIZE_DECIMAL - 2, "",
	   rotate, endmask,
	   SIZE_HEX, result, SIZE_DECIMAL, (long)(signed32)result);

  return tic80_trace_buffer;
}

/* Trace the result of an FPU operation with 2 floating point inputs and a floating point output */
void
tic80_trace_fpu3 (SIM_DESC sd,
		  sim_cpu *cpu,
		  sim_cia cia,
		  int indx,
		  sim_fpu *result,
		  sim_fpu *input1,
		  sim_fpu *input2)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  trace_one_insn (sd, cpu, cia.ip, 1,
		  itable[indx].file, itable[indx].line_nr, "fpu",
		  "%-*s %*g %*g => %*g",
		  tic80_size_name, itable[indx].name,
		  SIZE_HEX + SIZE_DECIMAL + 3, sim_fpu_2d (input1),
		  SIZE_HEX + SIZE_DECIMAL + 3, sim_fpu_2d (input2),
		  SIZE_HEX + SIZE_DECIMAL + 3, sim_fpu_2d (result));
}

/* Trace the result of an FPU operation with 1 floating point input and a floating point output */
void
tic80_trace_fpu2 (SIM_DESC sd,
		  sim_cpu *cpu,
		  sim_cia cia,
		  int indx,
		  sim_fpu *result,
		  sim_fpu *input)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  trace_one_insn (sd, cpu, cia.ip, 1,
		  itable[indx].file, itable[indx].line_nr, "fpu",
		  "%-*s %*g %-*s => %*g",
		  tic80_size_name, itable[indx].name,
		  SIZE_HEX + SIZE_DECIMAL + 3, sim_fpu_2d (input),
		  SIZE_HEX + SIZE_DECIMAL + 3, "",
		  SIZE_HEX + SIZE_DECIMAL, sim_fpu_2d (result));
}

/* Trace the result of an FPU operation with 1 floating point input and a floating point output */
void
tic80_trace_fpu1 (SIM_DESC sd,
		  sim_cpu *cpu,
		  sim_cia cia,
		  int indx,
		  sim_fpu *result)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  trace_one_insn (sd, cpu, cia.ip, 1,
		  itable[indx].file, itable[indx].line_nr, "fpu",
		  "%-*s %-*s %-*s => %*g",
		  tic80_size_name, itable[indx].name,
		  SIZE_HEX + SIZE_DECIMAL + 3, "",
		  SIZE_HEX + SIZE_DECIMAL + 3, "",
		  SIZE_HEX + SIZE_DECIMAL, sim_fpu_2d (result));
}

/* Trace the result of an FPU operation with 2 floating point inputs and an integer output */
void
tic80_trace_fpu2i (SIM_DESC sd,
		   sim_cpu *cpu,
		   sim_cia cia,
		   int indx,
		   unsigned32 result,
		   sim_fpu *input1,
		   sim_fpu *input2)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  trace_one_insn (sd, cpu, cia.ip, 1,
		  itable[indx].file, itable[indx].line_nr, "fpu",
		  "%-*s %*g %*g => 0x%.*lx %-*ld",
		  tic80_size_name, itable[indx].name,
		  SIZE_HEX + SIZE_DECIMAL + 3, sim_fpu_2d (input1),
		  SIZE_HEX + SIZE_DECIMAL + 3, sim_fpu_2d (input2),
		  SIZE_HEX, result, SIZE_DECIMAL, (long)(signed32)result);
}

/* Trace the result of an FPU operation with 2 floating point inputs and an integer output
   that is the result of a comparison.  */
void
tic80_trace_fpu2cmp (SIM_DESC sd,
		     sim_cpu *cpu,
		     sim_cia cia,
		     int indx,
		     unsigned32 result,
		     sim_fpu *input1,
		     sim_fpu *input2)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  trace_one_insn (sd, cpu, cia.ip, 1,
		  itable[indx].file, itable[indx].line_nr, "fpu",
		  "%-*s %*g %*g => 0x%.*lx %s",
		  tic80_size_name, itable[indx].name,
		  SIZE_HEX + SIZE_DECIMAL + 3, sim_fpu_2d (input1),
		  SIZE_HEX + SIZE_DECIMAL + 3, sim_fpu_2d (input2),
		  SIZE_HEX, result, tic80_trace_cmp_internal (result));
}

/* Trace the result of a NOP operation */
char *
tic80_trace_nop (int indx)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  sprintf (tic80_trace_buffer, "%s", itable[indx].name);
  return tic80_trace_buffer;
}

/* Trace the result of a data sink with one input */
char *
tic80_trace_sink1 (int indx, unsigned32 input)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  sprintf (tic80_trace_buffer, "%-*s 0x%.*lx/%*ld",
	   tic80_size_name, itable[indx].name,
	   SIZE_HEX, input, SIZE_DECIMAL, (long)(signed32)input);

  return tic80_trace_buffer;
}

/* Trace the result of a data sink with two inputs */
char *
tic80_trace_sink2 (int indx, unsigned32 input1, unsigned32 input2)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  sprintf (tic80_trace_buffer, "%-*s 0x%.*lx/%*ld 0x%.*lx/%*ld",
	   tic80_size_name, itable[indx].name,
	   SIZE_HEX, input1, SIZE_DECIMAL, (long)(signed32)input1,
	   SIZE_HEX, input2, SIZE_DECIMAL, (long)(signed32)input2);

  return tic80_trace_buffer;
}

/* Trace the result of a data sink with three inputs */
char *
tic80_trace_sink3 (int indx, unsigned32 input1, unsigned32 input2, unsigned32 input3)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  sprintf (tic80_trace_buffer, "%-*s 0x%.*lx/%*ld 0x%.*lx/%*ld    0x%.*lx/%*ld",
	   tic80_size_name, itable[indx].name,
	   SIZE_HEX, input1, SIZE_DECIMAL, (long)(signed32)input1,
	   SIZE_HEX, input2, SIZE_DECIMAL, (long)(signed32)input2,
	   SIZE_HEX, input3, SIZE_DECIMAL, (long)(signed32)input3);

  return tic80_trace_buffer;
}

/* Trace the result of a conditional branch operation */
char *
tic80_trace_cond_br (int indx,
		     int jump_p,
		     unsigned32 cond,
		     unsigned32 target,
		     int size,
		     int code)
{
  char *suffix1, *suffix2;

  if (!tic80_size_name)
    tic80_init_trace ();

  if (size >= 0 && code >= 0)
    {				/* BCND */
      switch (code)
	{
	default: suffix1 = "???"; break;
	case 0:  suffix1 = "nev"; break;
	case 1:  suffix1 = "gt0"; break;
	case 2:  suffix1 = "eq0"; break;
	case 3:  suffix1 = "ge0"; break;
	case 4:  suffix1 = "lt0"; break;
	case 5:  suffix1 = "ne0"; break;
	case 6:  suffix1 = "le0"; break;
	case 7:  suffix1 = "alw"; break;
	}

      switch (size)
	{
	default: suffix2 = ".?"; break;
	case 0:  suffix2 = ".b"; break;
	case 1:  suffix2 = ".h"; break;
	case 2:  suffix2 = ".w"; break;
	}

    } else {			/* BBO/BBZ */

      suffix2 = "";
      switch (cond)
	{
	default: suffix1 = "??.?"; break;
	case 29: suffix1 = "hs.w"; break;
	case 28: suffix1 = "lo.w"; break;
	case 27: suffix1 = "ls.w"; break;
	case 26: suffix1 = "hi.w"; break;
	case 25: suffix1 = "ge.w"; break;
	case 24: suffix1 = "lt.w"; break;
	case 23: suffix1 = "le.w"; break;
	case 22: suffix1 = "gt.w"; break;
	case 21: suffix1 = "ne.w"; break;
	case 20: suffix1 = "eq.w"; break;
	case 19: suffix1 = "hs.h"; break;
	case 18: suffix1 = "lo.h"; break;
	case 17: suffix1 = "ls.h"; break;
	case 16: suffix1 = "hi.h"; break;
	case 15: suffix1 = "ge.h"; break;
	case 14: suffix1 = "lt.h"; break;
	case 13: suffix1 = "le.h"; break;
	case 12: suffix1 = "gt.h"; break;
	case 11: suffix1 = "ne.h"; break;
	case 10: suffix1 = "eq.h"; break;
	case  9: suffix1 = "hs.b"; break;
	case  8: suffix1 = "lo.b"; break;
	case  7: suffix1 = "ls.b"; break;
	case  6: suffix1 = "hi.b"; break;
	case  5: suffix1 = "ge.b"; break;
	case  4: suffix1 = "lt.b"; break;
	case  3: suffix1 = "le.b"; break;
	case  2: suffix1 = "gt.b"; break;
	case  1: suffix1 = "ne.b"; break;
	case  0: suffix1 = "eq.b"; break;
	}
    }

  if (jump_p)
    sprintf (tic80_trace_buffer,
	     "%-*s 0x%.*lx %*s 0x%.*lx/%*ld => 0x%.*lx %s%s",
	     tic80_size_name, itable[indx].name,
	     SIZE_HEX, target, SIZE_DECIMAL, "",
	     SIZE_HEX, cond, SIZE_DECIMAL, (long)(signed32)cond,
	     SIZE_HEX, target,
	     suffix1, suffix2);
  else
    sprintf (tic80_trace_buffer,
	     "%-*s 0x%.*lx %*s 0x%.*lx/%*ld => %-*s %s%s",
	     tic80_size_name, itable[indx].name,
	     SIZE_HEX, target, SIZE_DECIMAL, "",
	     SIZE_HEX, cond, SIZE_DECIMAL, (long)(signed32)cond,
	     SIZE_HEX + 2, "[no jump]",
	     suffix1, suffix2);

  return tic80_trace_buffer;
}

/* Trace the result of a unconditional branch operation */
char *
tic80_trace_ucond_br (int indx,
		      unsigned32 target)
{
  if (!tic80_size_name)
    tic80_init_trace ();

  sprintf (tic80_trace_buffer,
	     "%-*s 0x%.*lx %*s => 0x%.*lx",
	     tic80_size_name, itable[indx].name,
	     SIZE_HEX, target, (SIZE_DECIMAL*2) + SIZE_HEX + 4, "",
	     SIZE_HEX, target);

  return tic80_trace_buffer;
}

/* Trace the result of a load or store operation with 2 integer addresses
   and an integer output or input */
void
tic80_trace_ldst (SIM_DESC sd,
		  sim_cpu *cpu,
		  sim_cia cia,
		  int indx,
		  int st_p,
		  int m_p,
		  int s_p,
		  unsigned32 value,
		  unsigned32 input1,
		  unsigned32 input2)
{
  char name[40];

  if (!tic80_size_name)
    tic80_init_trace ();

  strcpy (name, itable[indx].name);
  if (m_p)
    strcat (name, ":m");

  if (s_p)
    strcat (name, ":s");

  trace_one_insn (sd, cpu, cia.ip, 1,
		  itable[indx].file, itable[indx].line_nr, "memory",
		  "%-*s 0x%.*lx/%*ld 0x%.*lx/%*ld %s 0x%.*lx/%*ld",
		  tic80_size_name, name,
		  SIZE_HEX, input1, SIZE_DECIMAL, (long)(signed32)input1,
		  SIZE_HEX, input2, SIZE_DECIMAL, (long)(signed32)input2,
		  (!st_p) ? "=>" : "<=",
		  SIZE_HEX, value, SIZE_DECIMAL, (long)(signed32)value);
}

#endif /* WITH_TRACE */