path: root/sim/h8300/writecode.c

/* code generator for the Hitachi H8/300 architecture simulator.
   Copyright (C) 1990-1991 Free Software Foundation, Inc.
   Hacked by Steve Chamberlain of Cygnus Support.

This file is part of BFD, the Binary File Descriptor library.

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 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* This program reads the H8/300 opcode table and writes out
   a large switch statement to understand the opcodes (with ifs if
   there is more than one opcode per case) and code to do the stuff  */

#include "bfd.h"
#include "sysdep.h"

#define DEFINE_TABLE
#define INSIM
#include"opcode/h8300.h"

#define MAXSAME 14

#define PTWO 256
static struct h8_opcode *h8_opcodes_sorted[PTWO][MAXSAME];

char *cs = "/*";
char *ce = "*/";

/* How to get at nibble n from the instruction */
char *nibs[] =
{
  "foo",
  "(b0&0xf)",
  "((b1>>4)&0xf)",
  "((b1)&0xf)",
  "((pc[2]>>4)&0xf)",
  "((pc[2])&0xf)",
  "((pc[3]>>4)&0xf)",
  "((pc[3])&0xf)",
  0, 0};

/* how to get at the 3 bit immediate in the instruction */
char *imm3[] =
{"foo",
 "foo",
 "((pc[1]>>4)&0x7)",
 "foo",
 "foo",
 "foo",
 "((pc[3]>>4)&0x7)"};

/* How to get at a byte register from an index in the instruction at
   nibble n */
char *breg[] =
{"foo",
 "*(blow[b0])",
 "*(bhigh[b1])",
 "*(blow[b1])"};

/* How to get at a word register from an index in the instruction at
   nibble n */

char *wreg[] =
{"foo",
 "*(wlow[b0])",
 "*(whigh[b1])",
 "*(wlow[b1])"};

#define sorted_key noperands

/* sort the opcode table into h8_opcodes_sorted[0..255] */
static void
init ()
{
  unsigned int i;
  struct h8_opcode *p;

  for (p = h8_opcodes; p->name; p++)
    {
      int n1 = 0;
      int n2 = 0;
      int j;

      for (j = 0; p->data.nib[j] != E; j++)
	{
	  if ((int) p->data.nib[j] == ABS16ORREL8SRC)
	    p->data.nib[j] = ABS16SRC;
	  if ((int) p->data.nib[j] == ABS16OR8SRC)
	    p->data.nib[j] = ABS16SRC;
	  if ((int) p->data.nib[j] == ABS16OR8DST)
	    p->data.nib[j] = ABS16DST;
	}
      if ((int) p->data.nib[0] < 16)
	{
	  n1 = (int) p->data.nib[0];
	}
      else
	n1 = 0;
      if ((int) p->data.nib[1] < 16)
	{
	  n2 = (int) p->data.nib[1];
	}
      else
	n2 = 0;
      for (i = 0; i < MAXSAME; i++)
	{
	  int j = /* ((n3 >> 3) * 512) + ((n4 >> 3) * 256) + */ n1 * 16 + n2;

	  if (h8_opcodes_sorted[j][i] == (struct h8_opcode *) NULL)
	    {
	      h8_opcodes_sorted[j][i] = p;
	      p->sorted_key = j;
	      break;
	    }
	}

      if (i == MAXSAME)
	abort ();

      /* Just make sure there are an even number of nibbles in it, and
       that the count is the same s the length */
      for (i = 0; p->data.nib[i] != E; i++)
	/*EMPTY*/ ;
      if (i & 1)
	abort ();
      p->length = i / 2;
    }
  for (i = 0; i < PTWO; i++)
    {
      if (h8_opcodes_sorted[i][0])
	p = h8_opcodes_sorted[i][0];
      else
	h8_opcodes_sorted[i][0] = p;
    }
}

/* either fetch srca&srcb or store dst */

void
decode (p, fetch, size)
     struct h8_opcode *p;
     int fetch;
     int size;
{
  int i;
  char *ss = size == 8 ? "BYTE" : "WORD";

  for (i = 0; p->data.nib[i] != E; i++)
    {
      switch (p->data.nib[i])
	{
	case RS8:
	  if (fetch)
	    printf ("srca = %s;\n", breg[i]);
	  break;
	case RS16 | B30:
	case RS16 | B31:
	case RS16:
	  if (fetch)
	    printf ("srca = %s;\n", wreg[i]);
	  break;
	case RD8:
	  if (fetch)
	    printf ("srcb = %s;\n", breg[i]);
	  else
	    printf ("%s = dst;\n", breg[i]);
	  break;
	case RD16 | B30:
	case RD16 | B31:
	case RD16:
	  if (fetch)
	    printf ("srcb = %s;\n", wreg[i]);
	  else
	    printf ("%s =dst;\n", wreg[i]);
	  break;
	case IMM8:
	  if (fetch)
	    printf ("srca = b1;\n");
	  break;
	case RSINC:
	case RSINC | B30:
	case RSINC | B31:

	  if (fetch)
	    {
	      printf ("srca = %s_MEM(%s);\n", ss, wreg[i]);
	      printf ("%s+=%d;\n", wreg[i], size / 8);
	    }
	  break;
	case RSIND:
	case RSIND | B30:
	case RSIND | B31:
	  if (fetch)
	    {
	      printf ("lval = %s;\n", wreg[i]);
	      printf ("srca = %s_MEM(lval);\n", ss);
	    }
	  break;

	case RDIND:
	case RDIND | B30:
	case RDIND | B31:
	  if (fetch)
	    {
	      printf ("lval = %s;\n", wreg[i]);
	      printf ("srcb = %s_MEM(lval);\n", ss);
	    }
	  else
	    {
	      printf ("SET_%s_MEM(lval,dst);\n", ss);
	    }
	  break;

	case MEMIND:
	  if (fetch)
	    {
	      printf ("lval = ((pc[2]<<8)|pc[3]);\n");
	    }
	  break;
	case RDDEC:
	case RDDEC | B30:
	case RDDEC | B31:
	  if (!fetch)
	    {
	      printf ("%s -=%d;\n", wreg[i], size / 8);
	      printf ("SET_%s_MEM(%s, dst);\n", ss, wreg[i]);
	    }
	  break;
	case IMM3:
	case IMM3 | B31:
	case IMM3 | B30:

	  if (fetch)
	    printf ("srca = %s;\n", imm3[i]);
	  break;
	case IMM16:
	  if (fetch)
	    printf ("srca =( pc[2] << 8) | pc[3];\n");
	  break;
	case ABS8SRC:
	  if (fetch)
	    {

	      printf ("lval = (0xff00) + b1;\n");
	      printf ("srca = BYTE_MEM(lval);\n");
	    }

	  break;
	case ABS8DST:
	  if (fetch)
	    {
	      printf ("lval = (0xff00) + b1;\n");
	      printf ("srcb = BYTE_MEM(lval);\n");
	    }
	  else
	    {
	      printf ("SET_BYTE_MEM(lval,dst);\n");
	    }
	  break;
	case KBIT:
	  if (fetch)
	    printf ("srca = ((b1&0x80)?2:1);\n");
	  break;
	case ABS16ORREL8SRC:
	case ABS16SRC:
	  if (fetch)
	    {
	      printf ("lval = ((pc[2] << 8) + pc[3]);\n");
	      printf ("srca = %s_MEM(lval);\n", size == 8 ? "BYTE" : "WORD");
	    }
	  break;
	case DISPREG | B30:
	case DISPREG | B31:
	case DISPREG:
	  printf ("rn = %s & 0x7;\n", nibs[i]);
	  break;
	case DISPSRC:
	  if (fetch)
	    {
	      printf ("lval = 0xffff&((pc[2] << 8) + pc[3] +reg[rn]);\n");
	      printf ("srca = %s_MEM(lval);\n", size == 8 ? "BYTE" : "WORD");
	    }
	  break;
	case DISPDST:
	  if (fetch)
	    {
	      printf ("lval = 0xffff&((pc[2] << 8) + pc[3] +reg[rn]);\n");
	      printf ("srcb = %s_MEM(lval);\n", size == 8 ? "BYTE" : "WORD");
	    }
	  else
	    {
	      printf ("SET_%s_MEM(lval,dst);\n", ss);
	    }
	  break;
	case ABS16DST:
	  if (fetch)
	    {
	      printf ("lval = ((pc[2] << 8) + pc[3]);\n");
	      printf ("srcb = %s_MEM(lval);\n", ss);
	    }
	  else
	    {
	      printf ("SET_%s_MEM(lval,dst);\n", ss);
	    }
	  break;
	case IGNORE:
	  break;
	case DISP8:
	  printf ("			/* DISP8 handled in opcode */\n");
	  break;
	default:
	  if (p->data.nib[i] > HexF)
	    {
	      printf ("exception = SIGILL;\n");
	    }
	}
    }
}


static void
esleep ()
{
  printf ("exception = SIGSTOP;\n");
}

static void
mov (p, s, sz)
     struct h8_opcode *p;
     char *s;
     int sz;
{
  printf ("dst = srca;\n");
}

static void
andc (p)
     struct h8_opcode *p;
{
  printf ("SET_CCR(GET_CCR() & srca);\n");
}

static void
addx (p)
     struct h8_opcode *p;
{
  printf ("dst = srca + srcb+ (c != 0);\n");
}

static void
subx (p)
     struct h8_opcode *p;
{
  printf ("dst = srcb - srca - (c != 0);\n");
}

static void
add (p, s, sz)
     struct h8_opcode *p;
     char *s;
     int sz;
{
  printf ("%s;\n", s);
}

static void
adds (p, s)
     struct h8_opcode *p;
     char *s;
{
  printf ("%s;\n", s);
}

static void
bra (p, a)
     struct h8_opcode *p;
     char *a;
{
  printf ("if (%s) npc += (((char *)pc)[1]);\n", a);
}

static void
bsr (p, a)
     struct h8_opcode *p;
     char *a;
{
  printf ("reg[7]-=2;\n");
  printf ("tmp = reg[7];\n");
  printf ("SET_WORD_MEM(tmp, npc-mem);\n");
  printf ("npc += (((char *)pc)[1]);\n");
}

static void
cmp (p, a, s)
     struct h8_opcode *p;
     char *a;
     int s;
{
  decode (p, 1, s);
  printf ("srca = -srca;\n");
  printf ("dst = srca + srcb;\n");
}

static
void
jsr (p, a, s)
     struct h8_opcode *p;
     char *a;
     int s;
{
  printf ("if (b1 == 0xc4) {\n");
  printf ("printf(\"%%c\", reg[2]);\n");
  printf ("}\n");
  printf ("else {\n");
  printf ("reg[7]-=2;\n");
  printf ("tmp = reg[7];\n");
  printf ("SET_WORD_MEM(tmp, npc-mem);\n");
  printf ("npc = lval + mem;\n");
  printf ("}");
}

static void
jmp (p, a, s)
     struct h8_opcode *p;
     char *a;
     int s;
{
  printf ("npc = lval + mem;\n");
}

static void
rts (p, a, s)
     struct h8_opcode *p;
     char *a;
     int s;
{
  printf ("tmp = reg[7];\n");
  printf ("reg[7]+=2;\n");
  printf ("npc = mem + WORD_MEM(tmp);\n");
}

static void
setf (p, a, s)
     struct h8_opcode *p;
     char *a;
     int s;
{
  printf ("tmp = GET_CCR();\n");
  printf ("tmp %s= srca;\n", a);
}

static void
bpt (p, a, s)
     struct h8_opcode *p;
     char *a;
     int s;
{
  printf ("exception = SIGTRAP;\n");
  printf ("npc = pc;\n");
}

static void
log (p, a, s)
     struct h8_opcode *p;
     char *a;
     int s;
{
  printf ("dst = srcb %s srca;\n", a);
}

static void
ulog (p, a, s)
     struct h8_opcode *p;
     char *a;
     int s;
{
  printf ("dst = %s srcb ;\n", a);
}

static void
nop ()
{
}

static void
rotl ()
{
  printf ("c = srcb & 0x80;\n");
  printf ("dst = srcb << 1;\n");
  printf ("if (c) dst|=1;\n");
}

static void
rotr ()
{
  printf ("c = srcb & 1;\n");
  printf ("dst = srcb >> 1;\n");
  printf ("if (c) dst|=0x80;\n");
}

static void
rotxl ()
{
  printf ("tmp = srcb & 0x80;\n");
  printf ("dst = srcb << 1;\n");
  printf ("if (c) dst|=1;\n");
  printf ("c = tmp;\n");
}

static void
rotxr ()
{
  printf ("tmp = srcb & 1;\n");
  printf ("dst = srcb >> 1;\n");
  printf ("if (c) dst|=0x80;\n");
  printf ("c = tmp;\n");
}

static void
shal ()
{
  printf ("c = srcb&0x80;\n");
  printf ("dst = srcb << 1;\n");
}

static
void
shar ()
{
  printf ("c = srcb&0x1;\n");
  printf ("if (srcb&0x80) dst = (srcb>>1) | 0x80;\n");
  printf ("else  dst = (srcb>>1) &~ 0x80;\n");
}

static
void
shll ()
{
  printf ("c = srcb&0x80;\n");
  printf ("dst = srcb << 1;\n");
}

static
void
shlr ()
{
  printf ("c = srcb&0x1;\n");
  printf ("dst = (srcb>>1) &~ 0x80;\n");
}

static
void
divxu ()
{
  printf ("srca = %s;\n", breg[2]);
  printf ("srcb = %s;\n", wreg[3]);
  printf ("n = srca & 0x80;\n");
  printf ("z = !srca;\n");
  printf ("if (srca) dst = srcb / srca;tmp = srcb %% srca;\n");
  printf ("%s = (dst & 0xff) | (tmp << 8);\n", wreg[3]);
}

static
void
mulxu ()
{
  printf ("srca = %s;\n", breg[2]);
  printf ("srcb = %s;\n", wreg[3]);

  printf ("dst = (srcb&0xff) * srca;\n");
  printf ("%s = dst;\n", wreg[3]);
}

static
void
inc ()
{
  printf ("dst = %s;\n", breg[3]);
  printf ("v = (dst==0x7f);\n");
  printf ("dst++;\n");
  printf ("%s= dst;\n", breg[3]);
}

static
void
bit (p, a, s)
     struct h8_opcode *p;
     char *a;
     int s;
{
  printf ("%s\n", a);
}

static
void
dec ()
{
  printf ("dst = %s;\n", breg[3]);
  printf ("v = (dst==0x80);\n");
  printf ("dst--;\n");
  printf ("%s = dst;\n", breg[3]);
}

char saf[] = "goto setflags;";
char sf[] = "goto shiftflags;";
char af8[] = "goto aluflags8;";
char af16[] = "goto aluflags16;";
char lf[] = "goto logflags;";
char icf[] = "goto incflags;";
char mf8[] = "goto movflags8;";
char mf16[] = "goto movflags16;";
char nx[] = "goto next;";

struct
{
  char *ftype;
  int decode;
  char *name;
  void (*func) ();
  char *arg;
  int size;

}

table  [] =
{
  {    nx, 1, "bld", bit, "dst = srcb; c = (srcb>>srca)&1;", 8  }  ,
  {    nx, 1, "bild", bit, "dst = srcb; c = !((srcb>>srca)&1);", 8  }  ,
  {    nx, 1, "band", bit, "dst = srcb; c = C &&((srcb>>srca)&1);", 8  }  ,
  {    nx, 1, "biand", bit, "dst = srcb; c = C &&(!((srcb>>srca)&1));", 8  }  ,
  {    nx, 1, "bior", bit, "dst = srcb; c = C ||(!((srcb>>srca)&1));", 8  }  ,
  {    nx, 1, "bor", bit, "dst = srcb; c = C ||(((srcb>>srca)&1));", 8  }  ,
  {    nx, 1, "bixor", bit, "dst = srcb; c = C ^(!((srcb>>srca)&1));", 8  }  ,
  {    nx, 1, "bxor", bit, "dst = srcb; c = C ^(((srcb>>srca)&1));", 8  }  ,
  {    nx, 1, "bnot", bit, "dst = srcb ^ (1<<srca);", 8  }  ,
  {    nx, 1, "bclr", bit, "dst = srcb & ~(1<<srca);", 8  }  ,
  {    nx, 1, "bset", bit, "dst = srcb | (1<<srca);", 8  }  ,
  {    nx, 1, "bst", bit, "dst = (srcb & ~(1<<srca))| ((C)<<srca);", 8  }  ,
  {    nx, 1, "bist", bit, "dst = (srcb & ~(1<<srca))| ((!C)<<srca);", 8  }  ,
  {    nx, 1, "btst", bit, "dst = srcb; z = !((srcb>>srca)&1);", 8  }  ,
  {    icf, 0, "dec", dec, 0, 0  }  ,
  {    icf, 0, "inc", inc, 0, 0  }  ,
  {    saf, 1, "orc", setf, "|", 0  }  ,
  {    saf, 1, "xorc", setf, "^", 0  }  ,
  {    saf, 1, "andc", setf, "&", 0  }  ,
  {    nx, 1, "nop", nop, 0, 0  }  ,
  {    nx, 1, "bra", bra, "1", 0  }  ,
  {    nx, 1, "brn", bra, "0", 0  }  ,
  {    nx, 1, "bhi", bra, "(C||Z)==0", 0  }  ,
  {    nx, 1, "bls", bra, "(C||Z)==1", 0  }  ,
  {    nx, 1, "bcs", bra, "C==1", 0  }  ,
  {    nx, 1, "bcc", bra, "C==0", 0  }  ,
  {    nx, 1, "bpl", bra, "N==0", 0  }  ,
  {    nx, 1, "bmi", bra, "N==1", 0  }  ,
  {    nx, 1, "bvs", bra, "V==1", 0  }  ,
  {    nx, 1, "bvc", bra, "V==0", 0  }  ,
  {    nx, 1, "bge", bra, "(N^V)==0", 0  }  ,
  {    nx, 1, "bgt", bra, "(Z|(N^V))==0", 0  }  ,
  {    nx, 1, "blt", bra, "(N^V)==1", 0  }  ,
  {    nx, 1, "ble", bra, "(Z|(N^V))==1", 0  }  ,
  {    nx, 1, "beq", bra, "Z==1", 0  }  ,
  {    nx, 1, "bne", bra, "Z==0", 0  }  ,
  {    nx, 1, "bsr", bsr, "", 0  }  ,
  {    nx, 1, "jsr", jsr, 0, 0  }  ,
  {    nx, 1, "jmp", jmp, 0, 0  }  ,
  {    nx, 0, "rts", rts, 0, 0  }  ,
  {    nx, 1, "andc", andc, 0, 0  }  ,
  {    sf, 1, "shal", shal, 0, 0  }  ,
  {    sf, 1, "shar", shar, 0, 0  }  ,
  {    sf, 1, "shll", shll, 0, 0  }  ,
  {    sf, 1, "shlr", shlr, 0, 0  }  ,
  {    sf, 1, "rotxl", rotxl, 0, 0  }  ,
  {    sf, 1, "rotxr", rotxr, 0, 0  }  ,
  {    sf, 1, "rotl", rotl, 0, 0  }  ,
  {    sf, 1, "rotr", rotr, 0, 0  }  ,
  {    lf, 1, "xor", log, "^", 0  }  ,
  {    lf, 1, "and", log, "&", 0  }  ,
  {    lf, 1, "or", log, "|", 0  }  ,
  {    lf, 1, "not", ulog, " ~", 0  }  ,
  {    lf, 1, "neg", ulog, " - ", 0  }  ,
  {    nx, 1, "adds", adds, "dst = srca + srcb", 0  }  ,
  {    nx, 1, "subs", adds, "srca = -srca; dst = srcb + srca", 0  }  ,
  {    af8, 1, "add.b", add, "dst = srca + srcb", 8  }  ,
  {    af16, 1, "add.w", add, "dst = srca + srcb", 16  }  ,
  {    af16, 1, "sub.w", add, "srca = -srca; dst = srcb + srca", 16  }  ,
  {    af8, 1, "sub.b", add, "srca = -srca; dst = srcb + srca", 8  }  ,
  {    af8, 1, "addx", addx, 0, 8  }  ,
  {    af8, 1, "subx", subx, 0, 8  }  ,
  {    af8, 0, "cmp.b", cmp, 0, 8  }  ,
  {    af16, 0, "cmp.w", cmp, 0, 16  }  ,
  {    nx, 1, "sleep", esleep, 0, 0  }  ,
  {    nx, 0, "bpt", bpt, 0, 8  }  ,
  {    nx, 0, "divxu", divxu, 0, 0  }  ,
  {    nx, 0, "mulxu", mulxu, 0, 0  }  ,
  {    mf8, 1, "mov.b", mov, 0, 8  }  ,
  {    mf8, 1, "movtpe", mov, 0, 8  }  ,
  {    mf8, 1, "movfpe", mov, 0, 8  }  ,
  {    mf16, 1, "mov.w", mov, 0, 16  }  ,
  {    0  }
};

static
void
edo (p)
     struct h8_opcode *p;
{
  int i;

  printf ("%s %s %s\n", cs, p->name, ce);

  for (i = 0; table[i].name; i++)
    {
      if (strcmp (table[i].name, p->name) == 0)
	{
	  printf ("{\n");
	  if (table[i].decode)
	    decode (p, 1, table[i].size);
	  printf ("cycles += %d;\n", p->time);
	  printf ("npc = pc + %d;\n", p->length);
	  table[i].func (p, table[i].arg, table[i].size);
	  if (table[i].decode)
	    decode (p, 0, table[i].size);
	  if (table[i].ftype)
	    printf (table[i].ftype);
	  else
	    printf ("goto next;\n");
	  printf ("}\n");
	  return;
	}
    }
  printf ("%s not found %s\n", cs, ce);
  printf ("exception = SIGILL;\n");
  printf ("break;\n");
}

static
int
owrite (i)
     int i;
{
  /* write if statements to select the right opcode */
  struct h8_opcode **p;
  int needand = 1;

  p = h8_opcodes_sorted[i];
  printf ("case 0x%03x:\n", i);

  if (p[1] == 0)
    {
      /* See if the next few also match */
      while (h8_opcodes_sorted[i + 1][0] == *p)
	{
	  i++;
	  printf ("case 0x%03x:\n", i);
	}

      /* Dont need any if's this is the only one */
      edo (*p);
    }
  else
    {
      while (*p)
	{
	  /* start two nibbles in since we know we match in the first byte */
	  int c;
	  int nib = 2;
	  int byte = 1;
	  int mask1[5];
	  int mask0[5];
	  int nibshift = 4;
	  int any = 0;

	  for (c = 0; c < 5; c++)
	    {
	      mask1[c] = 0;
	      mask0[c] = 0;
	    }
	  printf ("%s %x%x", cs, (*p)->data.nib[0], (*p)->data.nib[1]);
	  while ((c = (*p)->data.nib[nib]) != E)
	    {
	      if (c & B30)
		{
		  /* bit 3 must be zero */
		  mask0[byte] |= 0x8 << nibshift;
		  printf ("0");
		  any = 1;
		}
	      else if (c & B31)
		{
		  /* bit 3 must be one */
		  mask1[byte] |= 0x8 << nibshift;
		  printf ("8");
		  any = 1;
		}
	      else if (c <= HexF)
		{
		  mask0[byte] |= ((~c) & 0xf) << nibshift;
		  mask1[byte] |= (c & 0xf) << nibshift;
		  printf ("%x", c);
		  any = 1;
		}
	      else
		{
		  printf ("x");
		}
	      nib++;
	      if (nibshift == 4)
		{
		  nibshift = 0;
		}
	      else
		{
		  byte++;
		  nibshift = 4;
		}
	    }
	  printf ("*/\n");
	  if (any)
	    {
	      printf ("if (");
	      needand = 0;
	      for (c = 1; c < byte; c++)
		{
		  if (mask0[c] | mask1[c])
		    {
		      if (needand)
			printf ("\n&&");
		      printf ("((pc[%d]&0x%02x)==0x%x)",
			      c, mask0[c] | mask1[c], mask1[c]);
		      needand = 1;
		    }
		}
	      printf (")\n");
	    }
	  edo (*p);
	  p++;

	}
    }
  return i;
}

static
void
remove_dups ()
{
  struct h8_opcode *s;
  struct h8_opcode *d;

  for (d = s = h8_opcodes; s->name; s++)
    {
      int doit = 1;

      if (strcmp (s->name, "push") == 0)
	doit = 0;
      if (strcmp (s->name, "bhs") == 0)
	doit = 0;
      if (strcmp (s->name, "blo") == 0)
	doit = 0;
      if (strcmp (s->name, "bt") == 0)
	doit = 0;
      if (strcmp (s->name, "bf") == 0)
	doit = 0;
      if (strcmp (s->name, "pop") == 0)
	doit = 0;
      if (doit)
	{
	  *d++ = *s;
	}
    }
  *d++ = *s++;
}

int
main ()
{
  int i;

  remove_dups ();
  init ();

  printf ("%s do the operation %s\n", cs, ce);
  printf ("switch (b0) \n{\n");
  for (i = 0; i < PTWO; i++)
    {
      i = owrite (i);
    }
  printf ("}\n");

  return 0;
}